阅读说明：本技术 圆盘抛光机及其控制系统 (Disc polishing machine and control system thereof ) 是由 邝忠胜 于 2021-09-27 设计创作，主要内容包括：本发明公开了一种圆盘抛光机及其控制系统,包括机架,它还包括抛光轮、前后移动工作台、左右移动工作台、升降工作台和用于固定工件的转盘；所述的前后移动工作台前后滑动配合在机架底部,所述的左右移动工作台左右滑动配合在前后移动工作台上,所述的升降工作台设在左右移动工作台上带动转盘上下运动,所述的转盘靠近抛光轮实现对工件进行抛光,本发明提供一种可对产品的多个侧面进行抛光使得抛光效果好的圆盘抛光机及其控制系统。(The invention discloses a disc polishing machine and a control system thereof, comprising a frame, a polishing wheel, a front-back moving workbench, a left-right moving workbench, a lifting workbench and a turntable for fixing a workpiece, wherein the polishing wheel is arranged on the frame; the front-back moving workbench is in front-back sliding fit with the bottom of the rack, the left-right moving workbench is in left-right sliding fit with the front-back moving workbench, the lifting workbench is arranged on the left-right moving workbench and drives the turntable to move up and down, and the turntable is close to the polishing wheel to polish workpieces.)

1. A disc polishing machine comprises a frame (1), and is characterized in that: the polishing machine also comprises a polishing wheel (2), a front-back moving workbench (3), a left-right moving workbench (4), a lifting workbench (5) and a turntable (7) for fixing a workpiece (6);

the front-back moving workbench (3) is in front-back sliding fit with the bottom of the rack (1), the left-right moving workbench (4) is in left-right sliding fit with the front-back moving workbench (3), the lifting workbench (5) is arranged on the left-right moving workbench (4) and drives the turntable (7) to move up and down, and the turntable (7) is close to the polishing wheel (2) to polish a workpiece (6).

2. The disc polisher of claim 1, wherein: the automatic feeding device is characterized in that a guide rail (8) is arranged at the bottom of the rack (1), a sliding block (9) is arranged at the bottom of the front-back moving workbench (3), a front-back motor (10) is arranged on the rack (1), and the front-back motor (10) drives the front-back moving workbench (3) to be in front-back sliding fit on the guide rail (8).

3. The disc polisher of claim 2, wherein: guide rail (8) including supporting part (11) and guide part (12), guide part (12) establish supporting part (11) upper end, the shape of guide part (12) cross section include major arc (13) and water flat line (14), major arc (13) opening down, water flat line (14) be located the lower extreme of major arc (13), water flat line (14) control both ends and be connected with major arc (13) both ends respectively, slider (9) lower extreme be equipped with open slot (15), guide part (12) sliding fit in open slot (15) upper end, supporting part (11) upper end sliding fit in open slot (15) lower extreme.

4. The disc polisher of claim 1, wherein: the upper surface of the front-back moving workbench (3) is also provided with a guide rail (8), the bottom surface of the left-right moving workbench (4) is also provided with a slide block (9) corresponding to the guide rail (8), the rack (1) is provided with a swing motor (16), and the swing motor (16) drives the left-right moving workbench (4) to be in sliding fit on the guide rail (8) from side to side.

5. The disc polisher of claim 1, wherein: the device also comprises a worm wheel (17), a worm (18), a screw rod (19) and an up-down motor, wherein the up-down motor, the worm wheel (17) and the worm (18) are all arranged on the left-right moving workbench (4);

the upper end of the screw rod (19) is arranged on the lifting workbench (5), the lower end of the screw rod (19) is in threaded connection with the worm wheel (17), the upper motor and the lower motor drive the worm wheel (17) to rotate through the worm (18), and the screw rod (19) drives the lifting workbench (5) to move up and down when the worm wheel (17) rotates.

6. The disc polisher of claim 5, wherein: a thread sleeve (21) is arranged in the worm wheel (17), and the lower end of the screw rod (19) is matched in the thread sleeve (21).

7. The disc polisher of claim 1, wherein: the automatic lifting device is characterized by further comprising a guide rod (22), wherein the lower end of the guide rod (22) is fixed on the left-right moving workbench (4), and the upper end of the guide rod (22) is in sliding fit with the lifting workbench (5).

8. The disc polisher of claim 1, wherein: the polishing machine also comprises a liquid waxing device, wherein a discharge hole of the liquid waxing device is positioned right above the polishing wheel (2).

9. The disc polisher of claim 1, wherein: lifting table (5) on be equipped with travel switch (28), carousel (7) bottom be equipped with branch (29), when branch (29) run into travel switch (28) time carousel (7) stall and work piece (6) axis and polishing wheel (2) axis parallel.

10. The control system of the disk polishing machine according to any one of claims 1 to 9, characterized in that: it includes PLC control module (30), is used for relay module (31) of transmission signal, is used for frequency converter module (32) of control motor and is used for gathering sensor module (33) of motor signal, sensor module (33) and motor one-to-one, sensor module (33) to gathering signal transmission for PLC control module (30), relay module (31) transmit the control signal of PLC control module (30) for frequency converter module (32).

Technical Field

The invention relates to the technical field of polishing machines, in particular to a disc polishing machine and a control system thereof.

Background

The polishing machine is a mechanical processing device for carrying out surface mechanical treatment on a workpiece made of a metal material to obtain the required surface smoothness. Polishing machines are required to polish multiple sides of a product to meet service requirements, especially for pipe. According to prior art, burnishing machine can't polish to the different sides of product, can't satisfy the demand, and polishing effect is poor.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the disc polishing machine and the control system thereof are provided, wherein the disc polishing machine can polish a plurality of side surfaces of a product so that the polishing effect is good.

In order to achieve the purpose, the technical scheme of the invention is as follows: a disk polishing machine comprises a frame, a polishing wheel, a front-back moving workbench, a left-right moving workbench, a lifting workbench and a turntable for fixing a workpiece;

the front-back moving workbench is in front-back sliding fit with the bottom of the frame, the left-right moving workbench is in left-right sliding fit with the front-back moving workbench, the lifting workbench is arranged on the left-right moving workbench and drives the turntable to move up and down, and the turntable is close to the polishing wheel to polish workpieces.

After adopting the structure, compared with the prior art, the invention has the following advantages: the polishing wheel, the front-back moving workbench, the left-right moving workbench, the lifting workbench and the turntable are arranged, so that the workpiece can move front and back, left and right and up and down, the polishing of different sides of the workpiece can be met, and the polishing effect is good.

Preferably, the bottom of the rack is provided with a guide rail, the bottom of the front-back moving workbench is provided with a slide block, the rack is provided with a front-back motor, the front-back motor drives the front-back moving workbench to be in front-back sliding fit on the guide rail, and the structure is simple.

Preferably, the guide rail comprises a supporting part and a guiding part, the guiding part is arranged at the upper end of the supporting part, the cross section of the guiding part comprises a major arc and a horizontal line, the opening of the major arc is downward, the horizontal line is positioned at the lower end of the major arc, the left end and the right end of the horizontal line are respectively connected with the two ends of the major arc, the lower end of the sliding block is provided with an open slot, the guiding part is in sliding fit in the upper end of the open slot, the upper end of the supporting part is in sliding fit in the lower end of the open slot, the guide rail comprises the supporting part and the guiding part, the guiding part is used for guiding the sliding block, and the cross section of the part of the guiding part, which is in contact with the sliding block, is arc-shaped, so that the contact area between the guiding part and the sliding block is large, the reliability is high, and the sliding is smoother; the upper end of the supporting part is in sliding fit with the opening groove on the sliding block, so that the sliding block is not easy to separate from the guide rail, and the reliability is high.

Preferably, the support part and the guide part are integrally molded, and the strength is high.

Preferably, the upper surface of the front-back moving workbench is also provided with a guide rail, the bottom surface of the left-right moving workbench is also provided with a slide block corresponding to the guide rail, the rack is provided with a swing motor, and the swing motor drives the left-right moving workbench to be in sliding fit on the guide rail left and right, so that the reliability is high.

Preferably, the device also comprises a worm wheel, a worm, a screw rod, an upper motor and a lower motor, wherein the upper motor, the lower motor, the worm wheel and the worm are arranged on the left-right moving workbench;

the upper end of the screw rod is arranged on the lifting workbench, the lower end of the screw rod is in threaded connection with the worm wheel, the upper motor and the lower motor drive the worm wheel to rotate through the worm, the screw rod drives the lifting workbench to move up and down when the worm wheel rotates, and the lifting workbench is driven to move up and down by the rotation of the screw rod, so that the lifting workbench is stable and reliable.

Preferably, a threaded sleeve is arranged in the worm wheel, and the lower end of the screw rod is matched in the threaded sleeve, so that the worm wheel is matched with the threaded sleeve conveniently.

Preferably, the lifting device further comprises a guide rod, the lower end of the guide rod is fixed on the left-right moving workbench, and the upper end of the guide rod is in sliding fit with the lifting workbench and plays a role in guiding the lifting workbench.

Preferably, the polishing device further comprises a liquid waxing device, a discharge port of the liquid waxing device is positioned right above the polishing wheel, liquid wax is sprayed on the polishing wheel, and the polishing effect is good.

Preferably, the lifting workbench is provided with a travel switch, the bottom of the rotary table is provided with a support rod, when the support rod touches the travel switch, the rotary table stops rotating, the axis of a workpiece is parallel to the axis of the polishing wheel, and the position of the rotary table is controlled by the travel switch, so that the workpiece is polished when the workpiece rotates to be parallel to the polishing wheel, and the straight polishing of the straight pipe is conveniently realized.

The utility model provides a control system according to above-mentioned disc burnishing machine, it includes PLC control module, the intermediate relay module that is used for transmitting the signal, the converter module that is used for controlling the motor and the sensor module that is used for gathering the motor signal, sensor module and motor one-to-one, sensor module gather the signal and transmit for PLC control module, intermediate relay module transmit PLC control module's control signal for the converter module, sensor module gathers the signal of motor and transmits for PLC control module, the signal of PLC control module feedback transmits for corresponding converter module through the intermediate relay module, then utilizes the start-up, stop and the rotational speed of converter module direct control motor.

Drawings

FIG. 1 is a perspective view of the disk polisher and its control system with the turntable removed in accordance with the present invention.

FIG. 2 is a perspective view of the disk polisher and its control system moving the work table forward and backward, moving the work table left and right, and lifting the work table.

FIG. 3 is a left side view of the disk burnishing machine and its control system guide of the present invention.

FIG. 4 is a perspective view of the disk polisher and its control system guide and slide of the present invention.

FIG. 5 is a perspective view of the disk burnishing machine and its control system moving the work table left and right and the lift table of the present invention.

FIG. 6 is a front cross-sectional view of the worm gear and lead screw of the disk polisher and its control system of the present invention.

FIG. 7 is a front view of the lift table and turntable of the present invention as the disk polisher and its control system perform straight line treatment on a straight pipe.

FIG. 8 is a control schematic diagram of the disk polisher and its control system of the present invention.

FIG. 9 is a wiring diagram of the input signals of the disk polisher and its control system of the present invention.

FIG. 10 is a wiring diagram of the output signals of the disk polisher and its control system of the present invention.

FIG. 11 is a schematic circuit diagram of the disk polisher and its control system for the intermediate relay control of the disk polisher.

FIG. 12 is a schematic circuit diagram of the frequency converter control of the disk polisher and its control system of the present invention.

FIG. 13 is a circuit diagram of the spindle motor of the disk polisher and its control system of the present invention.

The polishing machine comprises a machine frame, a polishing wheel, a front-back moving workbench, a left-right moving workbench, a lifting workbench, a workpiece, a 7, a rotary table, 8, a guide rail, a 9, a sliding block, 10, a front-back motor, 11, a supporting part, 12, a guiding part, 13, a major arc, 14, a horizontal line, 15, an open slot, 16, a swing motor, 17, a worm wheel, 18, a worm, 19, a screw rod, 20, a rotating motor, 21, a threaded sleeve, 22, a guide rod, 23, an upgrading sliding sleeve, 24, a spindle motor, 25, a first bearing, 26, a second bearing, 27, an annular bulge, 28, a travel switch, 29, a supporting rod, 30, a PLC (programmable logic controller) module, 31, an intermediate relay module, 32, a frequency converter module, 33 and a sensor module.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

As shown in figures 1 and 2, the invention provides a disc polishing machine, which comprises a frame 1, wherein the left side and the right side of the frame 1 are respectively provided with a baffle plate, the top of the frame 1 is provided with a cover plate, a polishing wheel 2 is positioned above the frame 1 and below the cover plate, a guide rail 8 is arranged on the frame 1, a front-back moving workbench 3, a left-right moving workbench 4 and a lifting workbench 5 form a moving assembly, a workpiece 6 is fixed on a turntable 7, the turntable 7 is arranged on the lifting workbench 5, specifically, the left-right moving workbench 4 is matched on the front-back moving workbench 3, the lifting workbench 5 is arranged on the left-right moving workbench 4, the front-back moving workbench 3 is in sliding fit on the guide rail 8 to realize the front-back movement of the workpiece 6, the left-right moving workbench 4 is in sliding fit on the front-back moving workbench 3 to realize the left-right movement of the workpiece 6, the lifting workbench 5 moves up and down to drive the turntable 7 to realize the lifting of the workpiece 6, the turntable 7 can move forward, move backward, swing left and right, and be adjusted up and down to meet the polishing requirements of different side surfaces of products, and particularly can polish irregular parts, dead angles such as holes, tubes and the like, and cracks and the like.

As an embodiment, the bottom of the front-back moving workbench 3 is provided with a slide block 9, the slide block 9 is in sliding fit with a guide rail 8 on the frame 1, specifically, a front-back motor 10 is arranged on the frame 1, and the front-back motor 10 is used for driving the front-back moving workbench 3 to be in sliding fit with the guide rail 8 in the front-back direction. In the same way, the left-right moving workbench 4 is in left-right sliding fit with the front-back moving workbench 3 through the matching of the slide block 9 and the guide rail 8. That is, the upper surface of the front-back moving workbench 3 is also provided with a guide rail 8, and the bottom surface of the left-right moving workbench 4 is also provided with a slide block 9 matched with the guide rail 8. Specifically, a swing motor 16 is provided on the frame 1, and the left-right moving table 4 is driven by the swing motor 16 to slide left and right on the front-back moving table 3. Specifically, the sliders 9 are fixed to the forward-backward movement table 3 and the leftward-rightward movement table 4 by bolts, respectively.

As an embodiment, as shown in fig. 3 and 4, the guide rail 8 includes a support plate 11 and a guide portion 12, the guide portion 12 is disposed on the support plate 11, the support plate 11 and the guide portion 12 are both distributed along the length direction of the guide rail 8, the cross section of the guide portion 12 includes a major arc 13 and a horizontal line 14, the major arc 13 opens downward, the horizontal line 14 is used for sealing the opening of the major arc 13, that is, the left and right ends of the horizontal line 14 are respectively connected with the two ends of the major arc 13 to form a closed figure, the cross section of the support plate 11 is rectangular, the horizontal line 14 coincides with the side above the rectangle, correspondingly, the bottom surface of the slider 9 is provided with an opening groove 15 that opens downward, the inner space of the opening groove 15 corresponds to the major arc 13, the opening position of the opening groove 15 corresponds to the horizontal line 14, the slider 9 is slidably fitted on the guide portion 12 by the opening of the opening groove 15, and the slider 9 is engaged with the opening of the major arc 13 at both sides of the upper end of the support plate 11 to prevent the slider 9 from rotating circumferentially. Specifically, the support plate 11 is integrally formed with the guide 12.

As an embodiment, as shown in fig. 5, the up-and-down movement of the lifting table 5 is realized by using a lifting mechanism, specifically, the lifting mechanism includes a worm wheel 17, a worm 18, a screw rod 19, and an up-and-down motor, the worm wheel 17, the worm 18, and the up-and-down motor are all disposed on the upper surface of the left-and-right moving table 3, the worm 18 is connected with the up-and-down motor and the worm wheel 17, the upper end of the screw rod 19 is disposed on the lifting table 5, the lower end of the screw rod 19 is disposed on the worm wheel 17, the lower end of the screw rod 19 is screwed with the worm wheel 17, the worm 18 is driven to rotate by the up-and-down motor, the worm wheel 17 is driven to rotate with the worm wheel 17, the worm wheel 17 is screwed with the screw rod 19 while rotating, and the up-and-down movement of the screw rod 19 drives the lifting table 5 to move up-and-down. Specifically, two bearing seats are arranged on the upper surface of the left-right moving workbench 3, and two ends of the worm 18 are respectively in running fit with the bearing seats.

Specifically, in order to facilitate the worm wheel 17 to be in threaded fit with the screw rod 19, a threaded sleeve 21 is arranged in the middle of the worm wheel 17, and the screw rod 19 is screwed with the threaded sleeve 21 to realize screwing with the worm wheel 17. Specifically, in order to ensure that elevating platform 5 moves smoothly, guide bar 22 is provided, the lower end of guide bar 22 is arranged on left-right moving platform 3, the upper end of guide bar 22 upwards penetrates elevating platform 5, elevating platform 5 is in up-down sliding fit on guide bar 22, specifically, the number of guide bars 22 is four, and guide bars 22 are respectively arranged at the positions of four corners of elevating platform 5. Specifically, in order to improve the reliability of the fit between the guide rod 22 and the lifting table 5, an upgrading sliding sleeve 23 is sleeved on the guide rod 22, and the lifting table 5 is in up-and-down sliding fit on the upgrading sliding sleeve 23. In order to limit the lifting workbench 5, the diameter of the upper end of the upgrading sliding sleeve 23 is larger than the diameter of the lower end of the upgrading sliding sleeve 23, and the lifting workbench 5 is in up-down sliding fit with the lower end of the upgrading sliding sleeve 23.

As an embodiment, in order to realize the rotation of the turntable 7, a rotating motor 20 is disposed on the lifting table 5, and the rotating motor 20 drives the turntable 7 to rotate.

As an example, a spindle motor is provided on the cover plate, and the spindle motor is used to drive the polishing wheel 2.

As an embodiment, in order to ensure polishing effect, set up liquid waxing device, liquid waxing device is including storing up wax bucket, pipeline, wax spraying motor and wax spraying pump, and the wax spraying pump is connected with storing up the wax bucket, and pipeline one end is connected with the wax spraying pump, and the pipeline other end runs through the apron and stretches in frame 1 and the tip of the pipeline other end is located throwing aureola 2 top, and the wax spraying motor starts to drive the wax spraying pump, and the liquid wax that the wax spraying pump stored up in the wax bucket is spouted from the pipeline on throwing aureola 2.

As an embodiment, as shown in fig. 6, in order to ensure that the screw rod 19 and the threaded sleeve 21 are matched more reliably, the length of the threaded sleeve 21 is greater than the thickness of the left-right moving table 4, specifically, a first bearing 25 is arranged on the upper surface of the left-right moving table 4, the worm wheel 17 is arranged on the first bearing 25, and the upper end of the threaded sleeve 21 is fixed in the first bearing 25. Specifically, the bottom surface of the left-right moving table 4 is provided with a second bearing 26, and the lower end of the threaded sleeve 21 is fixed in the second bearing 26. In order to ensure that the threaded sleeve 21 cannot fall off, the outer side surface of the upper end part of the threaded sleeve 21 is provided with an annular bulge 27 protruding out of the outer side surface of the threaded sleeve 21, and the annular bulge 27 is fixed on the worm wheel 17.

As an embodiment, the workpiece 6 comprises a straight pipe and a bent pipe, the straight pipe is subjected to straight grain processing, the bent pipe is subjected to diagonal grain processing, the rotating motor 20 is connected with the speed reducer, and the turntable 7 is arranged on the speed reducer. As shown in fig. 1 and 2. In fig. 2, the pipe is fixed to the turn table 7, and the turn table 7 is rotated all the time when the pipe is subjected to the diagonal processing. As shown in fig. 7, when the straight pipe is processed by straight line, a hood needs to be added, so that the rotating motor 20 and the speed reducer are located in the hood, and thus a travel switch 28 is provided on the hood, and a support rod 29 is provided at the bottom of the turntable 4, specifically, the number of the travel switches 28 is two, and the travel switches 28 are centrosymmetric about the turntable 7. The supporting rod 29 rotates along with the rotary table 7, and when the travel switch 28 is switched off by the supporting rod 29, the rotary motor 20 stops working; after one side of the straight pipe is polished, the rotating motor 20 is electrified again, the rotating motor 20 operates again, the rotating disc 7 rotates again, the supporting rod 29 rotates 180 degrees along with the rotating disc 7 and then shifts the other travel switch 28 again, the rotating motor 20 stops working, the other side of the straight pipe can be polished, the travel switch 28 is shifted through the supporting rod 29, the motor 1 is paused once when rotating 180 degrees, and therefore the front and the rear of the straight pipe are processed separately twice. Position requirement of the travel switch 28: when the support rod 29 toggles the travel switch 28, the straight pipe is parallel to the polishing wheel, and the straight line processing of the straight pipe can be realized at this time. Specifically, when polishing an inclined pipe and a straight pipe, the corresponding rotating disk 7 needs to be replaced.

Specifically, straight line polishing is carried out on the straight pipe, inclined pipe polishing is carried out on the inclined pipe, only the corresponding rotary table 7 needs to be replaced when the straight pipe and the inclined pipe are polished, and specifically, a support rod 29 is arranged on the rotary table 7 when the straight pipe is polished; when polishing the inclined tube, the rotary disc 7 is not provided with the support rod 29, but the lifting working table 5 is provided with the travel switch 28.

Specifically, the polishing wheel 2, the front-back moving workbench 3, the left-right moving workbench 4, the lifting workbench 5 and the turntable 7 are arranged, so that a workpiece 6 can move front and back, left and right and up and down, the polishing of different side surfaces of the workpiece can be met, and the polishing effect is good; (ii) a The polishing agent can polish irregular parts, dead angles such as holes, tubes and the like, cracks and the like, and has no dead angle during polishing.

The working process is as follows: firstly, fixing a workpiece 6 on a turntable 7; secondly, respectively starting a spindle motor and a wax spraying motor, wherein the spindle motor drives the polishing wheel 2 to rotate, and the wax spraying motor realizes spraying liquid wax on the polishing wheel 2; and thirdly, the spatial position of the workpiece 6 is adjusted by utilizing the forward and backward moving workbench 3, the leftward and rightward moving workbench 4 and the lifting workbench 5, meanwhile, the turntable 7 can also rotate, and the workpiece 6 can move forward and backward, leftward and rightward, up and down and can rotate automatically, so that the polishing of different sides of the workpiece can be met, and the polishing effect is good.

The utility model provides a disc polishing machine control system, it still includes PLC control module 30, an intermediate relay module 31 for transmitting signal, converter module 32 and sensor module 33, converter module 32 is used for controlling the motor, converter module 32 and motor one-to-one, sensor module 33 gathers the signal of motor and transmits for PLC control module 30, the signal that PLC control module 30 fed back transmits for corresponding converter module 32 through intermediate relay module 31, then utilize the start-up of converter module 32 direct control motor, stop and the rotational speed. While the travel switch 28 directly controls the start and stop of the rotary electric machine 20. The sensor module 33 is a rotational speed sensor.

Specifically, if the workpiece 6 is to be controlled to move back and forth, the sensor module 32 is used for collecting signals of the front and rear motors 10 and transmitting the signals to the PLC control module 30, then the PLC control module 30 feeds back the signals to the intermediate relay module 31, then the intermediate relay module 31 transmits the signals to the frequency converter module 32, finally the frequency converter module 32 controls the front and rear motors 10, and the front and rear motors 10 drive the front and rear movement workbench 3 to move back and forth; if the workpiece 6 is controlled to move left and right, firstly, the sensor module 32 is utilized to collect signals of the swing motor 16 and transmit the signals to the PLC control module 30, then the PLC control module 30 feeds back the signals to the intermediate relay module 31, then the intermediate relay module 31 transmits the signals to the frequency converter module 32, finally, the frequency converter module 32 controls the swing motor 16, and the swing motor 16 drives the left and right movement of the workbench 4; if the workpiece 6 is controlled to move up and down, the sensor module 32 is used for collecting signals of an upper motor and a lower motor and transmitting the signals to the PLC control module 30, then the PLC control module 30 feeds back signals to the intermediate relay module 31, then the intermediate relay module 31 transmits the signals to the frequency converter module 32, finally the frequency converter module 32 controls the upper motor and the lower motor, and the upper motor and the lower motor drive the lifting workbench 5 to move up and down; if the workpiece 6 is to be controlled to rotate, firstly, the sensor module 32 is used for collecting signals of the rotating motor 20 and transmitting the signals to the PLC control module 30, then the PLC control module 30 feeds back signals to the intermediate relay module 31, then the intermediate relay module 31 transmits the signals to the frequency converter module 32, finally, the frequency converter module 32 controls the rotating motor 20, the rotating motor 20 drives the turntable 7 to rotate, and meanwhile, when the straight line processing is carried out on the straight line pipe, the stroke switch 28 is used for controlling the starting and stopping of the rotating motor 20, so that the rotating motor 20 is powered off and powered on; similarly, the wax spraying motor is used for controlling the wax spraying pump to spray wax, and the spindle motor 24 is used for controlling the polishing wheel 2. The corresponding circuit diagrams are shown in fig. 8, 9, 10, 11, 12 and 13.

After adopting the structure, compared with the prior art, the invention has the following advantages: the PLC control system is used for processing different requirements such as straight lines and twill on the polishing part, the reliability is high, the universality is high, and straight line processing or twill processing on the bent pipe can be selected according to needs.

The PLC is selected from Dongyuan PLC series, specifically AP-130 BR-A.

On the basis of the above-described aspects, if various changes or modifications to the present invention are made without departing from the spirit and scope of the present invention, it is intended that the present invention also include these changes and modifications if they fall within the scope of the claims and the equivalent technical scope of the present invention.