阅读说明：本技术 一种适应于不同尺寸管件的内壁双向自动抛光装置及方法 (Bidirectional automatic polishing device and method suitable for inner walls of pipe fittings of different sizes ) 是由 王晓燕 康杰 赵方 于 2021-09-03 设计创作，主要内容包括：本发明公开了一种适应于不同尺寸管件的内壁双向自动抛光装置及方法,该装置包括工作台、PLC控制面板和PLC控制主机,工作台上设有上料机构、下料机构、装夹机构、横向尺寸调整机构和打磨机构,PLC控制面板和PLC控制主机分别与上料机构、下料机构、装夹机构、横向尺寸调整机构和打磨机构电性连接,本发明通过PLC控制面板和PLC控制主机能实现从管件两端同时进行内壁的双向自动抛光,能够适应不同的管件尺寸,能够完成上料、下料的自动化装置,节约生产时间,以提高自动化生产水平与生产效率。(The invention discloses a bidirectional automatic polishing device and method for inner walls of pipes with different sizes, wherein the device comprises a workbench, a PLC control panel and a PLC host, a feeding mechanism, a discharging mechanism, a clamping mechanism, a transverse size adjusting mechanism and a polishing mechanism are arranged on the workbench, and the PLC control panel and the PLC host are respectively and electrically connected with the feeding mechanism, the discharging mechanism, the clamping mechanism, the transverse size adjusting mechanism and the polishing mechanism.)

1. The utility model provides a two-way automatic burnishing device of inner wall that is adapted to not unidimensional pipe fitting which characterized in that: comprises a workbench, a PLC control panel and a PLC control host, wherein the workbench is provided with a feeding mechanism, a discharging mechanism, a clamping mechanism, a transverse size adjusting mechanism and a polishing mechanism, the feeding mechanism is positioned at the front side in the middle of the workbench, the blanking mechanism is positioned at the rear side in the middle of the workbench, the clamping mechanism is positioned between the feeding mechanism and the discharging mechanism, the transverse size adjusting mechanism is a symmetrical structure arranged at the left side and the right side of the clamping mechanism, the polishing mechanism is fixed on a second fixing plate above the transverse size adjusting mechanism, the polishing mechanism is of a symmetrical structure arranged at the left side and the right side of the clamping mechanism, a PLC control panel and a PLC control host are arranged on the left side of the workbench and are electrically connected, the PLC control panel and the PLC control host are respectively and electrically connected with the feeding mechanism, the discharging mechanism, the clamping mechanism, the transverse size adjusting mechanism and the polishing mechanism;

the feeding mechanism comprises a feeding guide groove, a feeding conveyor belt, a driving wheel and a conveying motor, the feeding guide groove is positioned on the front side of the workbench and close to the pipe fitting chuck, the feeding conveyor belt is arranged on the feeding guide groove, the driving wheel and the driving motor are arranged below the feeding conveyor belt, and an output shaft of the driving motor is connected with a main shaft of the driving wheel;

the blanking mechanism comprises a blanking guide chute, a blanking conveying belt, a driving wheel and a conveying motor, the blanking guide chute is positioned at the rear side of the workbench and close to the pipe fitting chuck, the blanking conveying belt is arranged on the blanking guide chute, the driving wheel and the driving motor are arranged below the blanking conveying belt, and an output shaft of the driving motor is connected with a main shaft of the driving wheel;

the clamping mechanism comprises a pipe fitting chuck, a chuck rotating motor and a jacking device, the pipe fitting chuck is positioned between the feeding guide chute and the discharging guide chute, the pipe fitting chuck is circular, an arc-shaped clamping groove is formed in the circumference of the pipe fitting chuck, a main shaft of the pipe fitting chuck is horizontally connected with an output shaft of the chuck rotating motor, the chuck rotating motor is fixed on a second motor base and is electrically connected with a PLC (programmable logic controller) host, the jacking device comprises a jacking block and a hydraulic jacking device, the jacking block is connected with a main shaft of the hydraulic jacking device, the hydraulic jacking device is fixed on a first fixing plate, and the first fixing plate is fixed on the gantry support;

the transverse size adjusting mechanism comprises two sliding frames, two first double guide rails, two ball screw nut pairs and two servo motors, the two sliding frames are respectively fixed on the left side and the right side of the first double guide rails, the two first double guide rails are fixed on the left side and the right side of the workbench, the two ball screw nut pairs are fixed on the front side and the rear side of the workbench, the sliding frame and the first double guide rails on the left side are located on the left side of the pipe fitting chuck, the sliding frame and the first double guide rails on the right side are located on the right side of the pipe fitting chuck, the sliding frame is connected to a triangular support, the triangular support is connected to the ball screw nut pairs, and a lead screw of each ball screw nut pair is connected to a main shaft of the servo motor;

the polishing mechanism consists of two hydraulic drivers, two second double guide rails, two polishing motors and two polishing brushes which are bilaterally symmetrical, the polishing brushes are arranged on the main shafts of the polishing motors, the polishing motors are arranged on a first motor base, the first motor base is fixed on the second double guide rails, the hydraulic drivers are arranged on a second fixing plate above the sliding frame, and the rear sides of the first motor bases are connected with the main shafts of the hydraulic drivers;

and the PLC control panel and the PLC control host are respectively electrically connected with the hydraulic driver and the hydraulic jacking device.

2. The bidirectional automatic polishing device for the inner walls of pipes with different sizes, which is disclosed by claim 1, is characterized in that: the feeding guide groove is composed of a left concave channel steel and a right concave channel steel, the feeding guide groove is inclined along the length direction and is low close to one end of a pipe fitting chuck, the concave channel steel is welded on a triangular support, the triangular support is fixed on a ball screw nut pair, the discharging guide groove is composed of the left concave channel steel and the right concave channel steel, the discharging guide groove is inclined along the length direction and is high close to one end of the pipe fitting chuck, the concave channel steel is welded on the triangular support, and the triangular support is fixed on the ball screw nut pair.

3. The bidirectional automatic polishing device for the inner walls of pipes with different sizes, which is disclosed by claim 1, is characterized in that: the feeding conveyor belt and the discharging conveyor belt are both horizontal.

4. The bidirectional automatic polishing device for the inner walls of pipes with different sizes, which is disclosed by claim 1, is characterized in that: the circumference of the pipe fitting chuck is provided with four arc-shaped clamping grooves which comprise a first station, a second station and a third station, the gantry support consists of a first cross beam, a second cross beam, a first longitudinal beam, a second longitudinal beam, a first upright post, a second upright post, a third upright post, a fourth upright post, a first short post and a second short post, the first cross beam is horizontally welded at the tops of the first upright post and the fourth upright post and is parallel to the axis of the pipe fitting chuck, the first upright post and the fourth upright post are welded on the surface of the workbench, the second cross beam is horizontally welded at the tops of the second upright post and the third upright post and is parallel to the first cross beam, the second upright post and the third upright post are welded on the surface of the workbench, the first longitudinal beam is welded between the first upright post and the second upright post and is fixed on the workbench, the second longitudinal beam is welded between the third upright post and the fourth upright post and is fixed on the workbench, the hydraulic jacking device comprises a gantry support, a first cross beam, a second cross beam, a first short column, a second short column, a hydraulic jacking device, a first fixing plate and a second fixing plate, wherein the first short column and the second short column are vertically welded between the first cross beam and the second cross beam and are parallel to each other, the hydraulic jacking device is fixed on the first fixing plate, and the first fixing plate is fixed on the first short column and the second short column of the gantry support.

5. The bidirectional automatic polishing device for the inner walls of pipes with different sizes, which is disclosed by claim 1, is characterized in that: the sliding frame is a cuboid frame-shaped support and is composed of eight horizontal columns and four stand columns, a second fixing plate is mounted on the upper surface of the sliding frame, the sliding frame is connected with the guide chute into a whole through a connecting rod, and the sliding frame is connected with the ball screw nut pair through an L-shaped cross beam.

6. The bidirectional automatic polishing device for the inner walls of pipes with different sizes, which is disclosed by claim 1, is characterized in that: the polishing brush is composed of a flexible polishing brush and a polishing wheel spindle, the flexible polishing brush is fixed on the polishing wheel spindle, and the polishing wheel spindle is horizontally connected with the polishing motor spindle and ensures coaxiality.

7. A bidirectional automatic polishing method for inner walls of pipes with different sizes is characterized in that: the method comprises the following steps:

(1) switching on a power supply, inputting the length and the size of a workpiece into a PLC control panel, sending an instruction by a PLC control program according to the length parameter of the workpiece, starting a servo motor to drive a lead screw of a ball screw nut pair to move, driving a sliding frame to move along a first double guide rail by the lead screw, driving a feeding guide chute and a discharging guide chute to move together by the sliding frame, and stopping moving until the length of the workpiece corresponds to the size;

(2) starting a feeding motor button of a PLC control panel, placing a workpiece on a feeding conveyor belt, conveying the workpiece to a feeding guide chute by the feeding conveyor belt at a fixed speed, enabling a displacement sensor at an inlet of the feeding guide chute to work, determining the movement distance of the workpiece by the displacement sensor, and transmitting a signal to a PLC control program, wherein the PLC program judges that the workpiece runs to a first station, the PLC program sends an instruction, starting a chuck rotating motor, the chuck rotating motor drives the workpiece to rotate, the PLC program judges that the workpiece rotates from the first station to a second station according to the rotation time of the chuck, and the PLC sends the instruction to enable the chuck rotating motor to stop working;

(3) the PLC program sends out an instruction, the hydraulic jacking device starts to work, the jacking block is pushed to move to jack the workpiece tightly, the pressure sensor arranged on the hydraulic pipeline detects a pressure value and transmits an acquired signal to the PLC program, when the pressure value reaches a set value, the PLC program judges that the workpiece is compacted, the PLC program sends out an instruction, and the hydraulic jacking device stops working;

(4) the PLC program sends out an instruction, the hydraulic driver on the left side starts to work to drive the grinding motor to slide along the second double guide rails, the displacement sensor arranged on the second double guide rails collects displacement signals of the grinding motor, the signals are transmitted to the PLC program, the PLC program judges that the grinding motor runs to the end point of the second double guide rails according to set parameter values, the PLC sends out the instruction, the hydraulic driver on the right side stops working, the PLC program sends out the instruction after a plurality of seconds according to set delay time parameters, the hydraulic driver on the right side starts to work to drive the grinding motor to slide along the second double guide rails, the displacement sensor arranged on the second double guide rails collects the displacement signals of the grinding motor, the signals are transmitted to the PLC program, the PLC program judges that the grinding motor runs to the end point of the second double guide rails according to the set parameter values, the PLC program sends out the instruction, and the hydraulic driver stops working;

(5) the PLC program sends out an instruction, the hydraulic driver on the left side works, the polishing motor works, the hydraulic driver drives the polishing motor to move from the end point of the second double guide rail, the polishing motor drives the polishing brush to rotate, the left side of the workpiece is polished, the PLC program sends out an instruction after a plurality of seconds according to the set delay time parameter, the hydraulic driver on the right side works, the polishing motor works, the hydraulic driver drives the polishing motor to move from the end point of the second double guide rail, the polishing motor drives the polishing brush to rotate, and the right side of the workpiece is polished; a displacement sensor arranged on a second double-guide rail collects displacement signals of the grinding motors on two sides, the collected signals are transmitted to a PLC program, the PLC program judges that the grinding motor on the left side moves from the end point to the starting point of the second double-guide rail according to set parameters, the PLC program judges that the grinding motor on the right side moves from the end point to the starting point of the second double-guide rail according to the set parameters, the PLC sends an instruction, a hydraulic driver on the left side stops working, the grinding motor stops working, the hydraulic driver on the right side stops working according to set delay time parameters after a plurality of seconds, and the grinding motor stops working and the grinding on the right side of the workpiece ends;

(6) the PLC program sends out an instruction, the hydraulic jacking device works to drive the jacking block to leave a workpiece, a pressure sensor arranged on the hydraulic jacking device collects pressure signals and transmits the collected signals to the PLC program, the PLC program judges that the jacking device is loosened according to a set value and moves to a safe distance, the PLC program sends out an instruction, and the hydraulic jacking device stops working;

(7) the PLC program sends out an instruction, the chuck rotating motor works, the workpiece rotates from the second station to the third station, the PLC program judges that the workpiece rotates to the third station according to the rotation time of the chuck rotating motor, the PLC program sends out an instruction, and the chuck rotating motor stops working;

(8) the PLC program sends out an instruction, the conveying motor drives the blanking conveying belt to start working, the workpiece enters the blanking conveying belt from the blanking guide chute, a displacement sensor arranged on the blanking guide chute collects workpiece displacement signals and transmits the collected signals to the PLC program, the PLC program judges that the workpiece leaves the blanking guide chute according to set parameters, and the workpiece is machined.

8. The method for bidirectionally and automatically polishing the inner wall of the pipe fitting with different sizes as claimed in claim 7, wherein: the pipe fitting chuck distributes three station, first station, second station and third station, first station is the material loading position, and the work piece state is for treating the processing state, the second station is the station of adding, and the work piece state is for processing the state, the third station is the material level of unloading, and the work piece state is for having processed the completion state, first station, second station and third station simultaneous working, material loading, top tightly, unloading three processes go on simultaneously, and when the process of polishing goes on, material loading, unloading process are in the wait of taking one's place.

9. The method for bidirectionally and automatically polishing the inner wall of the pipe fitting with different sizes as claimed in claim 7, wherein: the polishing brush on the left side is arranged at the point A, the polishing brush on the right side is arranged at the point B, the point A is the middle point of the pipe fitting, the point B is 2cm away from the middle point of the pipe fitting, the polishing brush on the left side is used for polishing in advance, and the polishing brush on the right side is used for polishing after being delayed for a plurality of seconds.

10. The method for bidirectionally and automatically polishing the inner wall of the pipe fitting with different sizes as claimed in claim 7, wherein: when the pipe fittings with different lengths are processed, the servo motor drives the lead screw of the ball screw nut pair to rotate relative to the nut, the lead screw drives the tripod to move towards the left side and the right side, so that the distance between the guide chutes is adjusted, and the tripod drives the sliding frame to move along the first double guide rail, so that the initial distance between the grinding wheels is adjusted.

The technical field is as follows:

the invention belongs to the technical field of polishing of inner walls of cylindrical pipes, and particularly relates to a bidirectional automatic polishing device and method for inner walls of pipes with different sizes.

Background art:

according to the use requirement, the inner wall of the cylindrical pipe fitting is usually required to be ground and polished so as to ensure certain surface roughness. Compared with the outer surface of the pipe fitting, the inner surface of the pipe fitting has narrow operation space, the grinding tool is not easy to operate on the inner surface, and the grinding and polishing difficulty is high. The polishing device for the inner wall of the existing pipe fitting is mainly used for polishing the pipe fitting in one direction and can only be used for the pipe fitting with a fixed size, and the feeding and the blanking still adopt manpower, so that much clamping and positioning time is spent, and the polishing efficiency is low.

Therefore, an automatic device which can polish the inner walls of two ends of a pipe simultaneously, adapt to different sizes of pipes and can automatically feed and discharge is particularly needed, so that the automatic production level and the production efficiency are improved.

The invention content is as follows:

aiming at the problems, the technical problem to be solved by the invention is to provide a bidirectional automatic polishing device for inner walls of pipes with different sizes, which comprises a workbench, a PLC control panel and a PLC control host, wherein the workbench is provided with a feeding mechanism, a discharging mechanism, a clamping mechanism, a transverse size adjusting mechanism and a polishing mechanism, the feeding mechanism is positioned on the front side of the middle of the workbench, the discharging mechanism is positioned on the rear side of the middle of the workbench, the clamping mechanism is positioned between the feeding mechanism and the discharging mechanism, the transverse size adjusting mechanism is of a symmetrical structure arranged on the left side and the right side of the clamping mechanism, the polishing mechanism is fixed on a second fixing plate above the transverse size adjusting mechanism, the polishing mechanism is of a symmetrical structure arranged on the left side and the right side of the clamping mechanism, the left side of the workbench is provided with the PLC control panel and the PLC control host, and the PLC control panel is electrically connected with the PLC control host, the PLC control panel and the PLC control host are respectively and electrically connected with the feeding mechanism, the discharging mechanism, the clamping mechanism, the transverse size adjusting mechanism and the polishing mechanism;

the feeding mechanism comprises a feeding guide groove, a feeding conveyor belt, a driving wheel and a conveying motor, the feeding guide groove is positioned on the front side of the workbench and close to the pipe fitting chuck, the feeding conveyor belt is arranged on the feeding guide groove, the driving wheel and the driving motor are arranged below the feeding conveyor belt, and an output shaft of the driving motor is connected with a main shaft of the driving wheel;

the blanking mechanism comprises a blanking guide chute, a blanking conveying belt, a driving wheel and a conveying motor, the blanking guide chute is positioned at the rear side of the workbench and close to the pipe fitting chuck, the blanking conveying belt is arranged on the blanking guide chute, the driving wheel and the driving motor are arranged below the blanking conveying belt, and an output shaft of the driving motor is connected with a main shaft of the driving wheel;

the clamping mechanism comprises a pipe fitting chuck, a chuck rotating motor and a jacking device, the pipe fitting chuck is positioned between the feeding guide chute and the discharging guide chute, the pipe fitting chuck is circular, an arc-shaped clamping groove is formed in the circumference of the pipe fitting chuck, a main shaft of the pipe fitting chuck is horizontally connected with an output shaft of the chuck rotating motor, the chuck rotating motor is fixed on a second motor base and is electrically connected with the PLC (programmable logic controller) host, the jacking device comprises a jacking block and a hydraulic jacking device, the jacking block is connected with a main shaft of the hydraulic jacking device, the hydraulic jacking device is fixed on a first fixing plate, and the first fixing plate is fixed on a first short column and a second short column of the gantry support;

the transverse size adjusting mechanism comprises two sliding frames, two first double guide rails, two ball screw nut pairs and two servo motors, the two sliding frames are respectively fixed on the left side and the right side of the first double guide rails, the two first double guide rails are fixed on the left side and the right side of the workbench, the two ball screw nut pairs are fixed on the front side and the rear side of the workbench, the sliding frame and the first double guide rails on the left side are located on the left side of the pipe fitting chuck, the sliding frame and the first double guide rails on the right side are located on the right side of the pipe fitting chuck, the sliding frame is connected to a triangular support, the triangular support is connected to the ball screw nut pairs, and a lead screw of each ball screw nut pair is connected to a main shaft of the servo motor;

the polishing mechanism consists of two hydraulic drivers, two second double guide rails, two polishing motors and two polishing brushes which are bilaterally symmetrical, the polishing brushes are arranged on the main shafts of the polishing motors, the polishing motors are arranged on a first motor base, the first motor base is fixed on the second double guide rails, the hydraulic drivers are arranged on a second fixing plate above the sliding frame, and the rear sides of the first motor bases are connected with the main shafts of the hydraulic drivers;

and the PLC control panel and the PLC control host are respectively electrically connected with the hydraulic driver and the hydraulic jacking device.

Preferably, the feeding guide groove is composed of a left concave channel steel and a right concave channel steel, the feeding guide groove is inclined along the length direction and is low close to one end of the pipe fitting chuck, the concave channel steel is welded on a triangular support, the triangular support is fixed on the ball screw nut pair, the discharging guide groove is composed of the left concave channel steel and the right concave channel steel, the discharging guide groove is inclined along the length direction and is high close to one end of the pipe fitting chuck, the concave channel steel is welded on the triangular support, and the triangular support is fixed on the ball screw nut pair.

Preferably, the feeding conveyor belt and the blanking conveyor belt are both horizontal.

Preferably, four arc-shaped clamping grooves are formed in the circumference of the pipe fitting chuck and comprise a first station, a second station and a third station, the gantry support consists of a first cross beam, a second cross beam, a first longitudinal beam, a second longitudinal beam, a first upright column, a second upright column, a third upright column, a fourth upright column, a first short column and a second short column, the first cross beam is horizontally welded at the tops of the first upright column and the fourth upright column and is parallel to the axis of the pipe fitting chuck, the first upright column and the fourth upright column are welded on the surface of the workbench, the second cross beam is horizontally welded at the tops of the second upright column and the third upright column and is parallel to the first cross beam, the second upright column and the third upright column are welded on the surface of the workbench, the first longitudinal beam is welded between the first upright column and the second upright column and is fixed on the workbench, the second cross beam is welded between the third upright column and the fourth upright column and is fixed on the workbench, the first short column and the second short column are vertically welded between the first cross beam and the second cross beam and are parallel to each other, and the hydraulic jacking device is fixed on the first short column and the second short column of the gantry support.

Preferably, the carriage is cuboid frame shape support, comprises eight horizontal columns and four stands, surface mounting second fixed plate on the carriage, the carriage passes through the connecting rod and links into whole with the baffle box, the carriage passes through L type crossbeam and is connected with ball screw nut pair.

Preferably, the polishing brush consists of a flexible polishing brush and a polishing wheel spindle, the flexible polishing brush is fixed on the polishing wheel spindle, and the polishing wheel spindle is horizontally connected with the polishing motor spindle and ensures coaxiality.

The invention provides a bidirectional automatic polishing method for inner walls of pipes with different sizes, which comprises the following steps:

(1) switching on a power supply, inputting the length and the size of a workpiece into a PLC control panel, sending an instruction by a PLC control program according to the length parameter of the workpiece, starting a servo motor to drive a lead screw of a ball screw nut pair to move, driving a sliding frame to move along a first double guide rail by the lead screw, driving a feeding guide chute and a discharging guide chute to move together by the sliding frame, and stopping moving until the length of the workpiece corresponds to the size;

(2) starting a feeding motor button of a PLC control panel, placing a workpiece on a feeding conveyor belt, conveying the workpiece to a feeding guide chute by the feeding conveyor belt at a fixed speed, enabling a displacement sensor at an inlet of the feeding guide chute to work, determining the movement distance of the workpiece by the displacement sensor, and transmitting a signal to a PLC control program, wherein the PLC program judges that the workpiece runs to a first station, the PLC program sends an instruction, starting a chuck rotating motor, the chuck rotating motor drives the workpiece to rotate, the PLC program judges that the workpiece rotates from the first station to a second station according to the rotation time of the chuck, and the PLC sends the instruction to enable the chuck rotating motor to stop working;

(3) the PLC program sends out an instruction, the hydraulic jacking device starts to work, the jacking block is pushed to move to jack the workpiece tightly, the pressure sensor arranged on the hydraulic pipeline detects a pressure value and transmits an acquired signal to the PLC program, when the pressure value reaches a set value, the PLC program judges that the workpiece is compacted, the PLC program sends out an instruction, and the hydraulic jacking device stops working;

(4) the PLC program sends out an instruction, the hydraulic driver on the left side starts to work to drive the grinding motor to slide along the second double guide rails, the displacement sensor arranged on the second double guide rails collects displacement signals of the grinding motor, the signals are transmitted to the PLC program, the PLC program judges that the grinding motor runs to the end point of the second double guide rails according to set parameter values, the PLC sends out the instruction, the hydraulic driver on the right side stops working, the PLC program sends out the instruction after a plurality of seconds according to set delay time parameters, the hydraulic driver on the right side starts to work to drive the grinding motor to slide along the second double guide rails, the displacement sensor arranged on the second double guide rails collects the displacement signals of the grinding motor, the signals are transmitted to the PLC program, the PLC program judges that the grinding motor runs to the end point of the second double guide rails according to the set parameter values, the PLC program sends out the instruction, and the hydraulic driver stops working;

(5) the PLC program sends out an instruction, the hydraulic driver on the left side works, the polishing motor works, the hydraulic driver drives the polishing motor to move from the end point of the second double guide rail, the polishing motor drives the polishing brush to rotate, the left side of the workpiece is polished, the PLC program sends out an instruction after a plurality of seconds according to the set delay time parameter, the hydraulic driver on the right side works, the polishing motor works, the hydraulic driver drives the polishing motor to move from the end point of the second double guide rail, the polishing motor drives the polishing brush to rotate, and the right side of the workpiece is polished; a displacement sensor arranged on a second double-guide rail collects displacement signals of the grinding motors on two sides, the collected signals are transmitted to a PLC program, the PLC program judges that the grinding motor on the left side moves from the end point to the starting point of the second double-guide rail according to set parameters, the PLC program judges that the grinding motor on the right side moves from the end point to the starting point of the second double-guide rail according to the set parameters, the PLC sends an instruction, a hydraulic driver on the left side stops working, the grinding motor stops working, the hydraulic driver on the right side stops working according to set delay time parameters after a plurality of seconds, and the grinding motor stops working and the grinding on the right side of the workpiece ends;

(6) the PLC program sends out an instruction, the hydraulic jacking device works to drive the jacking block to leave a workpiece, a pressure sensor arranged on the hydraulic jacking device collects pressure signals and transmits the collected signals to the PLC program, the PLC program judges that the jacking device is loosened according to a set value and moves to a safe distance, the PLC program sends out an instruction, and the hydraulic jacking device stops working;

(7) the PLC program sends out an instruction, the chuck rotating motor works, the workpiece rotates from the second station to the third station, the PLC program judges that the workpiece rotates to the third station according to the rotation time of the chuck rotating motor, the PLC program sends out an instruction, and the chuck rotating motor stops working.

(8) The PLC program sends out an instruction, the conveying motor drives the blanking conveying belt to start working, the workpiece enters the blanking conveying belt from the blanking guide chute, a displacement sensor arranged on the blanking guide chute collects workpiece displacement signals and transmits the collected signals to the PLC program, the PLC program judges that the workpiece leaves the blanking guide chute according to set parameters, and the workpiece is machined.

Preferably, the pipe fitting chuck distributes three station, first station, second station and third station, first station is the material loading position, and the work piece state is for the processing state, the second station is the processing position, and the work piece state is at the processing state, the third station is the material level of unloading, and the work piece state is the completion state of having processed, first station, second station and third station simultaneous working, material loading, tight, the unloading three processes go on simultaneously, and when the process of polishing goes on, material loading, unloading process are in the wait of taking one's place.

Preferably, the initial polishing position of the polishing brush on the left side is at a point A, the initial polishing position of the polishing brush on the right side is at a point B, the point A is at the midpoint of the pipe fitting, the point B is 2cm from the midpoint of the pipe fitting, the polishing brush on the left side performs polishing in advance, and the polishing brush on the right side performs polishing after delaying for several seconds;

preferably, when processing pipe fittings of different length, servo motor drives the relative nut of lead screw of ball screw nut pair and is rotary motion, and the lead screw drives the tripod and removes to the left and right sides to the interval of adjustment baffle box, the tripod drives the carriage and removes along first double guide rail, thereby the initial interval between the adjustment wheel of polishing.

The invention has the beneficial effects that: the automatic polishing device realizes the bidirectional automatic polishing of the inner wall of the pipe fitting, can adapt to different pipe fitting sizes, can automatically feed and discharge materials, saves the production time and improves the production efficiency.

Description of the drawings:

for ease of illustration, the invention is described in detail by the following specific examples and figures.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a schematic structural view of a gantry support;

FIG. 4 is a schematic view of a pipe chuck configuration;

FIG. 5 is a structural diagram of an upper and a lower material conveying belts;

FIG. 6 is a flowchart of a main process of the present invention;

FIG. 7 is a flowchart of a polishing subroutine of the present invention;

fig. 8 is a flowchart of a width adjustment procedure of the guide chute.

In the figure: 1-a workbench; 2-ball screw nut pair; 3-a servo motor; 4-a first double rail; 5-sliding rack; 6-a second dual rail; 7-a first motor mount; 8-a hydraulic drive; 9-grinding the motor; 10-polishing and brushing; 11-gantry support; 12-a top block; 13-a first fixing plate; 14-a hydraulic jacking device; 15-a second station; 16-a pipe chuck; 17-a chuck rotating motor; 18-a second motor mount; 19-a tripod; 20-a material guide groove; 21-a first station; a 22-L beam; 23-a connecting rod; 24-a third station; 25-a conveyor belt; 26-a first upright; 27-a first stringer; 28-a first beam; 29-a second upright; 30-a second beam; 31-a first stub; 32-a second stub; 33-a third column; 34-a fourth column; 35-a second stringer; 36-a conveyor motor; 37-a transmission wheel; 38-second fixing plate.

The specific implementation mode is as follows:

in order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 1-8, the bidirectional automatic polishing device for inner walls of pipe fittings with different sizes comprises a workbench 1, a PLC control panel and a PLC control host, wherein the workbench 1 is provided with a feeding mechanism, a discharging mechanism, a clamping mechanism, a transverse size adjusting mechanism and a polishing mechanism, the feeding mechanism is arranged on the front side of the middle of the workbench, the discharging mechanism is arranged on the rear side of the middle of the workbench 1, the clamping mechanism is arranged between the feeding mechanism and the discharging mechanism, the transverse size adjusting mechanism is a symmetrical structure arranged on the left side and the right side of the clamping mechanism, the polishing mechanism is fixed on a second fixing plate 38 above the transverse size adjusting mechanism, the polishing mechanism is a symmetrical structure arranged on the left side and the right side of the clamping mechanism, the PLC control panel and the PLC control host are arranged on the left side of the workbench, and the PLC control panel is electrically connected with the PLC control host, the PLC control panel and the PLC control host are respectively and electrically connected with the feeding mechanism, the discharging mechanism, the clamping mechanism, the transverse size adjusting mechanism and the polishing mechanism;

the feeding mechanism comprises a feeding guide chute 20, a feeding conveyor belt 25, a driving wheel 37 and a conveying motor 36, the feeding guide chute 20 is positioned on the front side of the workbench 1 and close to the pipe fitting chuck 16, the feeding conveyor belt 25 is arranged on the feeding guide chute 20, the driving wheel and a driving motor are arranged below the feeding conveyor belt 25, and an output shaft of the driving motor is connected with a main shaft of the driving wheel;

the blanking mechanism comprises a blanking guide chute 20, a blanking conveyor belt 25, a driving wheel 37 and a transmission motor 36, the blanking guide chute 20 is positioned at the rear side of the workbench 1 and close to the pipe fitting chuck 16, the blanking conveyor belt 25 is arranged on the blanking guide chute 20, the driving wheel and the transmission motor are arranged below the blanking conveyor belt 25, and an output shaft of the transmission motor is connected with a main shaft of the driving wheel;

the clamping mechanism comprises a pipe fitting chuck 16, a chuck rotating motor 17 and a jacking device, wherein the pipe fitting chuck 16 is positioned between a feeding guide chute 20 and a discharging guide chute 20, the pipe fitting chuck 16 is circular, an arc-shaped clamping groove is formed in the circumference of the pipe fitting chuck 16, a spindle of the pipe fitting chuck 16 is horizontally connected with an output shaft of the chuck rotating motor 17, the chuck rotating motor 17 is fixed on a second motor base 18 and is electrically connected with a PLC (programmable logic controller) host, the jacking device comprises a jacking block 12 and a hydraulic jacking device 14, the jacking block 12 is connected with a spindle of the hydraulic jacking device 14, the hydraulic jacking device 14 is fixed on a first fixing plate 13, and the first fixing plate 13 is fixed on a first short column 31 and a second short column 32 of a gantry support 11;

the transverse size adjusting mechanism comprises two sliding frames 5, two first double guide rails 4, two ball screw nut pairs 2 and two servo motors 3, wherein the two sliding frames 5 are respectively fixed on the left side and the right side of the first double guide rails 4, the two first double guide rails 4 are fixed on the left side and the right side of a workbench 1, the two ball screw nut pairs 2 are fixed on the front side and the rear side of the workbench 1, the sliding frame 5 and the first double guide rails 4 on the left side are located on the left side of a pipe fitting chuck 16, the sliding frame 5 and the first double guide rails 4 on the right side are located on the right side of the pipe fitting chuck 16, the sliding frame 5 is connected onto a triangular support 19, the triangular support 19 is connected onto the ball screw nut pairs 2, and a lead screw of the ball screw nut pairs 2 is connected onto a main shaft of the servo motors 3;

the polishing mechanism consists of two hydraulic drivers 8, two second double guide rails 6, two polishing motors 9 and two polishing brushes 10 which are bilaterally symmetrical, the polishing brushes 10 are arranged on main shafts of the polishing motors 9, the polishing motors 9 are arranged on a first motor base 7, the first motor base 7 is fixed on the second double guide rails 6, the hydraulic drivers are arranged on a second fixing plate 38 above the sliding frame 5, and the rear sides of the first motor bases 7 are connected with the main shafts of the hydraulic drivers;

the PLC control panel and the PLC control host are respectively and electrically connected with the hydraulic driver 8 and the hydraulic jacking device 14.

Specifically, the material loading baffle box 20 comprises two concave channel-section steels about by, and material loading baffle box 20 is low along length direction slope and be close to pipe fitting chuck 16 one end, the welding of concave groove steel is on A-frame 19, A-frame 19 is fixed on ball screw nut is vice 2, unloading baffle box 20 comprises two concave channel-section steels about by, and unloading baffle box 20 just is close to pipe fitting chuck 16 one end height along length direction slope, the welding of concave groove steel is on A-frame 19, A-frame 19 is fixed on ball screw nut is vice 2.

Specifically, the feeding conveyor belt 25 and the discharging conveyor belt 25 are both horizontal.

Specifically, four arc-shaped clamping grooves are formed in the circumference of the pipe fitting chuck 16 and comprise a first station 21, a second station 15 and a third station 24, the gantry support 11 is composed of a first cross beam 28, a second cross beam 30, a first longitudinal beam 27, a second longitudinal beam 35, a first upright post 26, a second upright post 29, a third upright post 33, a fourth upright post 34, a first short post 31 and a second short post 32, the first cross beam 28 is horizontally welded to the tops of the first upright post 26 and the fourth upright post 34 and is parallel to the axis of the pipe fitting chuck 16, the first upright post 26 and the fourth upright post 34 are welded to the surface of the workbench 1, the second cross beam 30 is horizontally welded to the tops of the second upright post 29 and the third upright post 33 and is parallel to the first cross beam 28, the second upright post 29 and the third upright post 33 are welded to the surface of the workbench 1, the first longitudinal beam 27 is welded between the first upright post 26 and the second upright post 29 and is fixed to the workbench 1, the second longitudinal beam 35 is welded between the third upright column 33 and the fourth upright column 34 and fixed on the workbench 1, the first stub 31 and the second stub 32 are vertically welded between the first cross beam 28 and the second cross beam 30, and the first stub 31 and the second stub 32 are parallel to each other.

Specifically, carriage 5 is cuboid frame shape support, comprises eight horizontal columns and four stands, 5 upper surface mounting second fixed plate 38 of carriage, carriage 5 connects into whole through connecting rod 23 and baffle box 20, can wholly slide, reaches the purpose of adjustment baffle box 20 width, and carriage 5 passes through L type crossbeam 22 and is connected with ball nut pair 2, makes ball nut 2 can drive carriage 5 and removes.

Specifically, the polishing brush 10 is composed of a flexible polishing brush 10 and a polishing wheel spindle, the flexible polishing brush 10 is fixed on the polishing wheel spindle, and the polishing wheel spindle is horizontally connected with a spindle of a polishing motor 9 and ensures coaxiality.

The invention provides a bidirectional automatic polishing method for inner walls of pipes with different sizes, which comprises the following steps:

(1) switching on a power supply, inputting the length and the size of a workpiece into a PLC control panel, sending an instruction by a PLC control program according to the length parameter of the workpiece, starting a servo motor 3 to drive a lead screw of a ball screw nut pair 2 to move, driving a sliding frame 5 to move along a first double guide rail 4 by the lead screw, driving a feeding guide chute 20 and a discharging guide chute 20 to move together by the sliding frame 5, and stopping moving until the length of the workpiece corresponds to the size;

(2) starting a feeding motor button of a PLC control panel, placing a workpiece on a feeding conveyor belt 25, conveying the workpiece to a feeding guide chute 20 by the feeding conveyor belt 25 at a fixed speed, working a displacement sensor at an inlet of the feeding guide chute 20, measuring the movement distance of the workpiece by the displacement sensor, transmitting a signal to a PLC control program, judging that the workpiece runs to a first station 21 by the PLC program, sending an instruction by the PLC program, starting a chuck rotating motor 17, driving the workpiece to rotate by the chuck rotating motor 17, judging that the workpiece rotates from the first station 21 to a second station 15 by the PLC program according to the rotation time of the chuck, and stopping the operation of the chuck rotating motor 17 by the PLC program;

(3) the PLC program gives an instruction, the hydraulic jacking device 14 starts to work, the jacking block 12 is pushed to move to jack the workpiece tightly, the pressure sensor arranged on the hydraulic pipeline detects a pressure value and transmits an acquired signal to the PLC program, when the pressure value reaches a set value, the PLC program judges that the workpiece is compacted, the PLC program gives an instruction, and the hydraulic jacking device 14 stops working;

(4) the PLC program sends out an instruction, the hydraulic driver 8 on the left side starts to work to drive the grinding motor 9 to slide along the second double guide rails 6, the displacement sensor arranged on the second double guide rails 6 collects displacement signals of the grinding motor 9, the signals are transmitted to the PLC program, the PLC program judges that the grinding motor 9 runs to the end point of the second double guide rails 6 according to set parameter values, the PLC sends out an instruction, the hydraulic driver 8 stops working, the PLC program sends out an instruction after a plurality of seconds according to set delay time parameters, the hydraulic driver 8 on the right side starts to work to drive the grinding motor 9 to slide along the second double guide rails 6, the displacement sensor arranged on the second double guide rails 6 collects displacement signals of the grinding motor 9, the signals are transmitted to the PLC program, the PLC program judges that the grinding motor 9 runs to the end point of the second double guide rails 6 according to the set parameter values, and the PLC sends out an instruction, the hydraulic actuator 8 stops working;

(5) the PLC program sends out an instruction, the hydraulic driver 8 on the left side works, the grinding motor 9 works, the hydraulic driver 8 drives the grinding motor 9 to move from the end point of the second double guide rail 6, the grinding motor 9 drives the grinding brush 10 to rotate, grinding on the left side of the workpiece starts, the PLC program sends out an instruction after a plurality of seconds according to a set delay time parameter, the hydraulic driver 8 on the right side works, the grinding motor 9 works, the hydraulic driver 8 drives the grinding motor 9 to move from the end point of the second double guide rail 6, the grinding motor 9 drives the grinding brush 10 to rotate, and grinding on the right side of the workpiece starts; a displacement sensor arranged on the second double guide rail 6 collects displacement signals of the grinding motors 9 on two sides, the collected signals are transmitted to a PLC program, the PLC program judges that the grinding motor 9 on the left side moves from the end point of the second double guide rail 6 to the starting point according to set parameters, the PLC program judges that the grinding motor 9 on the right side moves from the end point of the second double guide rail 6 to the starting point according to the set parameters, the PLC sends out an instruction, the hydraulic driver 8 on the left side stops working, the grinding motor 9 stops working after a plurality of seconds, the hydraulic driver 8 on the right side stops working, the grinding motor 9 stops working, and the grinding on the right side of the workpiece is finished;

(6) the PLC program sends out an instruction, the hydraulic jacking device 14 works to drive the jacking block to leave a workpiece, a pressure sensor arranged on the hydraulic jacking device 14 collects a pressure signal and transmits the collected signal to the PLC program, the PLC program judges that the jacking device is loosened according to a set value and moves to a safe distance, the PLC program sends out an instruction, and the hydraulic jacking device 14 stops working;

(7) the PLC program sends out an instruction, the chuck rotating motor 17 works, the workpiece rotates from the second station 15 to the third station 24, the PLC program judges that the workpiece rotates to the third station 24 according to the rotating time of the chuck rotating motor 17, the PLC program sends out an instruction, and the chuck rotating motor 17 stops working.

(8) The PLC program sends out an instruction, the conveying motor 36 drives the blanking conveying belt 25 to start working, the workpiece enters the blanking conveying belt 25 from the blanking guide chute 20, the displacement sensor arranged on the blanking guide chute 20 collects a workpiece displacement signal and transmits the collected signal to the PLC program, the PLC program judges that the workpiece leaves the blanking guide chute 20 according to set parameters, and the workpiece processing is finished.

Specifically, the pipe fitting chuck 16 is provided with three stations, namely a first station 21, a second station 15 and a third station 24, wherein the first station 21 is a loading position, the workpiece state is in a waiting processing state, the second station 15 is a processing position, the workpiece state is in a processing state, the third station 24 is a discharging position, the workpiece state is in a processed state, the first station 21, the second station 15 and the third station 24 work simultaneously, the three processes of loading, jacking and discharging are performed simultaneously, and when the polishing process is performed, the loading and discharging processes are in place and wait.

Specifically, the initial polishing position of the left polishing brush 10 is at a point A, the initial polishing position of the right polishing brush 10 is at a point B, the point A is at the midpoint of the pipe fitting, the point B is 2cm through the midpoint of the pipe fitting, the left polishing brush 10 performs polishing first, and the right polishing brush 10 starts polishing after a delay of several seconds;

specifically, when processing the pipe fitting of different length, servo motor 3 drives the relative nut of lead screw that ball nut pair 2 is rotary motion, and the lead screw drives the tripod and removes to the left and right sides to the interval of adjustment baffle box 20, the tripod drives carriage 5 and removes along first pair guide rail 4, thereby adjusts the originated interval between the wheel of polishing.

The working process of the invention is as follows: the conveying motor 36 drives the feeding conveyor belt 25 to feed the workpiece to the first station 21, the chuck rotating motor 17 drives the pipe fitting chuck 16 to rotate, the workpiece rotates from the first station 21 to the second station 15, the hydraulic jacking device 14 jacks the upper part of the workpiece of the second station 15 tightly, the hydraulic driver 8 on the left side drives the grinding motor 9 to slide along the first double guide rail 4 from the left side, the grinding motor 9 runs to the end point of the first double guide rail 4, meanwhile, the grinding brush 10 runs to the position A of the middle point of the workpiece, the grinding motor 9 drives the grinding brush 10 to rotate, and grinding and polishing on the left side begin;

after a plurality of seconds, the right hydraulic driver 8 drives the grinding motor 9 to slide along the first double guide rail 4 from the right side, the grinding motor 9 runs to the end point of the first double guide rail 4, the grinding brush 10 runs to the position B2 cm away from the middle point of the workpiece, the grinding motor 9 drives the grinding brush 10 to rotate, and grinding on the right side starts;

the left grinding motor 9 gradually moves from the end point of the first double guide rail 4 to the starting point, the grinding brush 10 gradually returns from the position A of the middle point of the workpiece to the left end face of the workpiece, the grinding motor 9 stops working, and grinding and polishing on the left side are finished;

the grinding motor 9 on the right side gradually moves from the end point of the first double guide rail 4 to the starting point, the grinding brush 10 gradually returns to the right end face of the workpiece from the position B which is 2cm away from the middle point of the workpiece, the grinding motor 9 stops rotating, and the grinding on the right side is finished;

the hydraulic pipe jacking device 14 loosens the upper part of the workpiece, the chuck rotating motor 17 drives the pipe chuck 16 to rotate, the workpiece rotates from the second station 15 to the third station 24, the conveying motor 36 drives the blanking conveying belt 25 to blank, the workpiece is conveyed to a blanking area, and the grinding and polishing processing is finished.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.