阅读说明：本技术 电磁场下利用液态金属进行抛光的旋转抛光装置及其方法 (Rotary polishing device and method for polishing by using liquid metal under electromagnetic field ) 是由 单晓杭 陈强 张利 李研彪 叶必卿 于 2019-10-16 设计创作，主要内容包括：本发明公开了一种电磁场下利用液态金属进行抛光的旋转抛光装置及其方法,包括滑动导轨夹紧组件、旋转夹持组件和定子线圈组件；所述滑动导轨夹紧组件包括导轨驱动电机、水平直线模组、联轴器、电机座和活动板,所述旋转夹持组件包括左侧双向连接座、右侧双向连接座、左活塞管、右活塞管、左活塞杆、右活塞杆、左侧充气活塞盖、右侧充气活塞盖、左侧工件夹持头、右侧工件夹持头、旋转驱动电机、主动带轮、从动带轮、同步带、左旋转接头、右旋转接头、左侧旋转管道、右侧旋转管道、左侧轴承座、右侧轴承座和右侧固定座,本发明通过控制液态金属可以实现对3D打印出来的加加工工件上的弯曲内孔进行抛光,实现了弯曲内孔抛光的自动化。(The invention discloses a rotary polishing device and a rotary polishing method for polishing by using liquid metal in an electromagnetic field, wherein the rotary polishing device comprises a sliding guide rail clamping assembly, a rotary clamping assembly and a stator coil assembly; the sliding guide clamping assembly comprises a guide rail driving motor, a horizontal linear module, a coupler, a motor base and a movable plate, the rotary clamping assembly comprises a left-side bidirectional connecting base, a right-side bidirectional connecting base, a left piston pipe, a right piston pipe, a left piston rod, a right piston rod, a left-side inflatable piston cover, a right-side inflatable piston cover, a left-side workpiece clamping head, a right-side workpiece clamping head, a rotary driving motor, a driving belt wheel, a driven belt wheel, a synchronous belt, a left rotary joint, a right rotary joint, a left-side rotary pipeline, a right-side rotary pipeline, a left-side bearing seat, a right-side bearing seat and a right-side fixing seat, and the automatic polishing of the bent inner hole on the machined workpiece printed by 3D can be realized by controlling liquid metal.)

1. A rotary polishing device for polishing by using liquid metal under an electromagnetic field is characterized in that: the device comprises a sliding guide rail clamping assembly, a rotary clamping assembly and a stator coil assembly;

the sliding guide rail clamping assembly comprises a guide rail driving motor (1), a horizontal linear module (3), a coupler (2), a motor base and a movable plate (4), the horizontal linear module (3) is horizontally installed on a workbench surface, the guide rail driving motor (1) is fixed at one end of the horizontal linear module (3) through the motor base, an output shaft of the guide rail driving motor (1) is connected with the horizontal linear module (3) through the coupler (2), the movable plate (4) is fixed on a sliding block of the horizontal linear module (3), and the sliding block of the horizontal linear module (3) and the movable plate (4) are driven to linearly move in the horizontal direction when the guide rail driving motor (1) moves;

the rotary clamping component comprises a left-side bidirectional connecting seat (17), a right-side bidirectional connecting seat (24), a left piston tube (16), a right piston tube (25), a left piston rod (14), a right piston rod (26), a left-side inflatable piston cover (13), a right-side inflatable piston cover (15), a left-side workpiece clamping head (7), a right-side workpiece clamping head (28), a rotary driving motor (23), a driving pulley, a driven pulley (27), a synchronous belt (10), a left rotary joint (18), a right rotary joint (11), a left-side rotary pipeline, a right-side rotary pipeline (31), a left-side bearing seat (19), a right-side bearing seat (9) and a right-side fixing seat (35), wherein the right-side fixing seat (35) is fixed on the working table top, the right-side bearing seat (9) and the right-side bidirectional connecting seat (, the left bearing seat (19) and the left bidirectional connecting seat (17) are fixedly arranged on the movable plate (4);

the one end fixed connection of left side piston pipe (16) is in the one end of the two-way connecting seat in left side (17), and the stiff end of left rotary joint (18) is connected to the other end of the two-way connecting seat in left side (17), the one end of left side rotary pipeline is connected to the expansion end of left side rotary joint (18), left side rotary pipeline passes through deep groove ball bearing (32) and supports on left side bearing frame (19), the other end and left side work piece clamping head (7) fixed connection of left side rotary pipeline, the other end cover of left side piston pipe (16) is equipped with left side inflating piston lid (13), and the left piston sets up in left piston pipe (16), and the left piston is connected to the one end of left piston rod (14), and the other end of left piston rod (14) passes left side inflating piston lid (13) and stretches out left side inflating piston lid (13), be provided with the inflation chamber that is linked together with the inner chamber of left piston pipe (16) on the left, an inflation inlet (36) communicated with the inflation cavity is formed in the left inflation piston cover (13), and the inflation inlet (36) of the left inflation piston cover (13) is connected with an external inflation device with a control valve through an inflation pipeline;

the one end fixed connection of right piston pipe (25) is in the one end of the two-way connecting seat in right side (24), and the stiff end of right rotary joint (11) is connected to the other end of the two-way connecting seat in right side (24), the one end of right rotary pipeline (31) is connected to the expansion end of right rotary joint (11), right rotary pipeline (31) supports on right side bearing (9) through deep groove ball bearing (32), the other end and right side work piece clamping head (28) fixed connection of right rotary pipeline (31), the other end cover of right piston pipe (25) is equipped with right side inflation piston lid (15), right piston (34) sets up in right piston pipe (25), right piston (34) is connected to the one end of right piston rod (26), the other end of right piston rod (26) passes right side inflation piston lid (15) and stretches out outside right side inflation piston lid (15), be provided with the inflation chamber that is linked together with the inner chamber of right piston pipe (25) on right side inflation piston lid (15), an inflation opening (36) communicated with the inflation cavity is formed in the right inflation piston cover (15), and the inflation opening (36) of the right inflation piston cover (15) is connected with an external inflation device with a control valve through another inflation pipeline;

the rotary driving motor (23) is fixed on the right side fixing seat (35), the driving belt wheel is installed on an output shaft of the rotary driving motor (23), the driven belt wheel (27) is fixed on the right side rotary pipeline (31), and the driving belt wheel and the driven belt wheel (27) are connected through the synchronous belt (10);

the axial leads of the left bidirectional connecting seat (17), the right bidirectional connecting seat (24), the left rotary pipeline, the right rotary pipeline (31), the left rotary joint (18), the right rotary joint (11), the left workpiece clamping head (7), the right workpiece clamping head (28), the left piston pipe (16) and the right piston pipe (25) are all located on the same straight line, the left workpiece clamping head (7) and the right workpiece clamping head (28) are respectively clamped at the left end and the right end of a workpiece to be machined, one end of a bent inner hole in the workpiece to be machined is communicated with the left piston pipe (16) through the left workpiece clamping head (7), and the other end of the bent inner hole in the workpiece to be machined is communicated with the right piston pipe (25) through the right workpiece clamping head (28);

a hexagonal abrasive particle flow joint (12) is further fixed on the right bidirectional connecting seat (24), the hexagonal abrasive particle flow joint (12) is connected with an external abrasive particle flow generating device with an abrasive particle flow control valve through a pipeline, and the hexagonal abrasive particle flow joint (12) is communicated with a piston cavity on one side, close to a workpiece to be processed, of the right piston tube (25);

stator coil assembly includes three-phase stator coil (20) and stator coil fixing base (8), stator coil fixing base (8) are the annular setting, and stator coil fixing base (8) fixed mounting is on right side fixing base (35), and three-phase stator coil (20) are fixed at stator coil fixing base (8) and are encircleed the setting of treating the processing work piece.

2. A rotary polishing device for polishing by liquid metal under electromagnetic field as claimed in claim 1, characterized in that: the left bidirectional connecting seat (17) is provided with a left threaded joint and a right threaded joint, the fixed end of the left movable joint is provided with an internal thread matched with the right threaded joint on the left bidirectional connecting seat (17), and the left movable joint is matched with the right threaded joint on the left bidirectional connecting seat (17) through the internal thread and is fixedly connected with the left bidirectional connecting seat (17); the right bidirectional connecting seat (24) is provided with a left threaded joint and a right threaded joint, the fixed end of the right movable joint is provided with an internal thread matched with the left threaded joint on the right bidirectional connecting seat (24), and the right movable joint is matched with the right bidirectional connecting seat (24) through the internal thread and the left threaded joint on the right bidirectional connecting seat (24).

3. A rotary polishing device for polishing by liquid metal under electromagnetic field as claimed in claim 1, characterized in that: the left side work piece clamping head (7) is gone up the cover and is equipped with left side slip ring (6) of leading electricity, the right side work piece clamping head (28) is gone up the cover and is equipped with right side slip ring (21) of leading electricity, and left side work piece clamping head (7) and right side work piece clamping head (28) are inside all to be provided with copper ring (29), and left side copper ring (29) and the inside copper ring (29) of left side work piece clamping head (7) pass through the wire intercommunication, and right side copper ring (29) and the inside copper ring (29) of right side work piece clamping head (28) pass through the wire intercommunication, and the positive negative pole of an external square wave alternating current power supply is connected respectively to left side copper ring (29) and right.

4. A rotary polishing device for polishing by liquid metal under electromagnetic field as claimed in claim 1, characterized in that: left side work piece holding head (7) and right side work piece holding head (28) all include cylindric stiff end and the installation end that is used for installing the work piece, be provided with on the fixed end of left side work piece holding head (7) with the internal thread matched with external screw thread on the rotatory pipeline in left side, the stiff end of left side work piece holding head (7) passes through the internal thread cooperation and left side two-way connecting seat (17) fixed connection on external screw thread and the left side rotatory pipeline, be provided with on the fixed end of right side work piece holding head (28) with the internal thread matched with external screw thread on the right side rotatory pipeline (31), the stiff end of right side work piece holding head (28) passes through the internal thread cooperation and right side two-way connecting seat (24) fixed connection on external screw thread and the right side rotatory pipeline.

5. The rotary polishing device for polishing by using liquid metal under electromagnetic field according to claim 4, characterized in that: the mounting ends of the left workpiece clamping head (7) and the right workpiece clamping head (28) are designed in a copying manner, different copying ends are designed for different workpieces, and two ends of the workpiece to be processed are respectively in sealing connection with the mounting ends of the left workpiece clamping head (7) and the right workpiece clamping head (28).

6. A rotary polishing device for polishing by liquid metal under electromagnetic field as claimed in claim 1, characterized in that: a sleeve (33) is further sleeved on the right rotary pipeline (31), and the sleeve (33) on the right rotary pipeline (31) is arranged between the right rotary joint (11) and the right bearing seat (9); still the cover is equipped with sleeve (33) on the rotatory pipeline of left side, and sleeve (33) on the rotatory pipeline of left side set up between left rotary joint (18) and left side bearing frame (19).

7. The rotary polishing method using liquid metal for polishing in an electromagnetic field of a rotary polishing apparatus using liquid metal for polishing in an electromagnetic field according to claim 1, characterized in that: the method specifically comprises the following steps: the method comprises the following steps: fixing one end of a workpiece to be machined in a right workpiece clamping head (28), starting a guide rail driving motor (1), driving the whole body formed by a sliding block and a movable plate (4) of a horizontal linear module (3) to move along a straight line through a coupler (2), enabling a left workpiece clamping head (7) to gradually approach the other end of the workpiece to be machined until the workpiece to be machined is clamped between the left workpiece clamping head (7) and the right workpiece clamping head (28), completely sealing the two ends of the workpiece to be machined with the left workpiece clamping head (7) and the right workpiece clamping head (28), stopping the guide rail driving motor (1), and respectively communicating the two ends of a bent inner hole in the workpiece to be machined with the insides of the left workpiece clamping head (7) and the right workpiece clamping head (28);

step two: injecting a liquid metal abrasive particle mixed solution into the whole device through a hexagonal abrasive particle flow joint (12) by using an abrasive particle flow generating device connected with the hexagonal abrasive particle flow joint (12) through a pipeline until the interior of a bent inner hole on a workpiece to be processed is filled with the liquid metal abrasive particle mixed solution, and stopping injecting the liquid metal abrasive particle mixed solution;

step three: respectively connecting inflation ports (36) of a right side inflation piston cover (15) and a left side inflation piston cover (13) with inflation devices with control valves, performing interval air supply on inflation cavities in the right side inflation piston cover (15) and the left side inflation piston cover (13) by controlling the opening and closing of the control valves, closing the control valves connected with the left side inflation piston cover (13) when the control valves connected with the right side inflation piston cover (15) are opened, and closing the control valves connected with the right side inflation piston cover (15) when the control valves connected with the left side inflation piston cover (13) are opened, so that the pistons connected with a left piston rod (14) and a right piston rod (26) are pushed to continuously move left and right, and liquid metal abrasive grain mixed liquid in a bent inner hole on a workpiece to be processed is pushed to reciprocate left and right;

step four: a rotary driving motor (23) is started, the rotary driving motor (23) drives a right rotary pipeline (31) to rotate through a synchronous belt mechanism consisting of a driving belt wheel, a synchronous belt (10) and a driven belt wheel (27), and further drives a workpiece to be processed to rotate;

step four: the three-phase alternating current is switched on for the three-phase stator coil (20), the three-phase alternating current enables the three-phase stator coil (20) to generate a rotating magnetic field, and liquid metal in the liquid metal abrasive particle mixed solution starts to rotate under the action of the rotating magnetic field, so that abrasive particle flow in the liquid metal abrasive particle mixed solution is driven to randomly impact the processing surface of a bent inner hole on a workpiece to be processed back and forth;

step five: after a certain time, the bent inner hole on the workpiece to be machined is machined, three-phase alternating current is cut off, the guide rail driving motor (1) is started to enable the workpiece clamping head (7) on the left side to move back, the workpiece to be machined is taken down, liquid metal abrasive particle mixed liquid in the whole device is poured out, and the whole bent inner hole polishing process is completed.

8. The rotary polishing method using liquid metal for polishing under an electromagnetic field according to claim 7, characterized in that: when the workpiece to be processed is made of a metal material, the external square wave alternating current power supply is turned on, square wave alternating current is conducted to copper rings (29) on a left workpiece clamping head (7) and a right workpiece clamping head (28), the workpiece to be processed is made of the metal material, and the alternating current can be finally applied to liquid metal of the liquid metal abrasive particle mixed liquid to enable the liquid metal to generate axial fluctuation, so that abrasive particles in the liquid metal abrasive particle mixed liquid are axially vibrated, and the process of the workpiece to be processed is disordered when the workpiece to be processed is polished back and forth and bent inner holes in the workpiece to be processed are formed.

Technical Field

The invention relates to the field, in particular to a rotary polishing device and a rotary polishing method for polishing by using liquid metal under an electromagnetic field.

Background

Polishing is a process that uses mechanical, chemical or electrochemical action to reduce the roughness of the surface of a workpiece to obtain a bright, flat surface. The method is to carry out modification processing on the surface of a workpiece by using a polishing tool and abrasive particles or other polishing media. Currently, mechanical polishing, chemical polishing, electrolytic polishing, etc. are commonly used polishing methods.

Liquid metal refers to an amorphous metal that can be viewed as a mixture of a positively ionic fluid and a free electron gas. Liquid metal is also an amorphous, flowable liquid metal. The liquid metal polishing refers to polishing work of a workpiece by liquid metal mixed liquid mixed with abrasive particles under a changing magnetic field and an electric field.

3D printing is one of the rapid prototyping technologies, which is a technology for constructing an object by using a bondable material such as powdered metal or plastic based on a digital model file and by printing layer by layer. Along with the continuous maturity of 3D printing technique, the application scope is more and more extensive, and does not have a suitable method to the through-hole processing of 3D printing product at present, mainly still through the manual work processing of polishing, can't realize the automatic polishing of through-hole, and machining efficiency is not high to the quality of processing can't obtain guaranteeing.

For polishing of a bent through hole of a workpiece, the traditional mechanical and chemical polishing technology cannot be adopted, so abrasive flow polishing and liquid metal polishing are generally adopted, but the efficiency of pure abrasive flow and liquid metal polishing is possibly low, and the polishing time is long.

Disclosure of Invention

The invention aims to solve the problems that the polishing efficiency of a bent inner hole of a 3D printed workpiece is low, the period is long, and automatic polishing cannot be realized, and provides a rotary polishing device and a method for polishing by using liquid metal under an electromagnetic field, which can automatically realize polishing of the bent inner hole of the 3D printed workpiece, have high polishing efficiency and high automation degree, greatly save the labor cost, and improve the processing efficiency.

The invention realizes the purpose through the following technical scheme: a rotary polishing device for polishing by using liquid metal under an electromagnetic field comprises a sliding guide rail clamping assembly, a rotary clamping assembly and a stator coil assembly;

the sliding guide rail clamping assembly comprises a guide rail driving motor, a horizontal linear module, a coupler, a motor base and a movable plate, wherein the horizontal linear module is horizontally arranged on the working table surface;

the rotary clamping assembly comprises a left bidirectional connecting seat, a right bidirectional connecting seat, a left piston tube, a right piston tube, a left piston rod, a right piston rod, a left inflatable piston cover, a right inflatable piston cover, a left workpiece clamping head, a right workpiece clamping head, a rotary driving motor, a driving pulley, a driven pulley, a synchronous belt, a left rotary joint, a right rotary joint, a left rotary pipeline, a right rotary pipeline, a left bearing seat, a right bearing seat and a right fixing seat, wherein the right fixing seat is fixed on a working table board;

one end of the left piston tube is fixedly connected with one end of the left bidirectional connecting seat, the other end of the left bidirectional connecting seat is connected with the fixed end of the left rotary joint, the movable end of the left rotary joint is connected with one end of a left rotary pipeline, the left rotary pipeline is supported on a left bearing seat through a deep groove ball bearing, the other end of the left rotary pipeline is fixedly connected with a left workpiece clamping head, the other end of the left piston tube is sleeved with a left inflation piston cover, the left piston is arranged in the left piston tube, one end of a left piston rod is connected with the left piston, the other end of the left piston rod passes through the left inflation piston cover and extends out of the left inflation piston cover, the left side inflating piston cover is provided with an inflating cavity communicated with the inner cavity of the left piston pipe, the left side inflating piston cover is provided with an inflating port communicated with the inflating cavity, and the inflating port of the left side inflating piston cover is connected with an external inflating device with a control valve through an inflating pipeline;

one end of the right piston tube is fixedly connected with one end of the right bidirectional connecting seat, the other end of the right bidirectional connecting seat is connected with the fixed end of the right rotary joint, the movable end of the right rotary adapter is connected with one end of a right rotary pipeline, the right rotary pipeline is supported on a right bearing seat through a deep groove ball bearing, the other end of the right rotary pipeline is fixedly connected with a right workpiece clamping head, the other end of the right piston tube is sleeved with a right inflatable piston cover, the right piston is arranged in the right piston tube, one end of a right piston rod is connected with the right piston, the other end of the right piston rod passes through the right inflatable piston cover and extends out of the right inflatable piston cover, an inflation cavity communicated with the inner cavity of the right piston tube is formed in the right inflation piston cover, an inflation opening communicated with the inflation cavity is formed in the right inflation piston cover, and the inflation opening of the right inflation piston cover is connected with an external inflation device with a control valve through another inflation pipeline;

the rotary driving motor is fixed on the right side fixing seat, the driving belt wheel is installed on an output shaft of the rotary driving motor, the driven belt wheel is fixed on the right side rotary pipeline, and the driving belt wheel and the driven belt wheel are connected through a synchronous belt;

the axial leads of the left bidirectional connecting seat, the right bidirectional connecting seat, the left rotary pipeline, the right rotary pipeline, the left rotary adapter, the right rotary adapter, the left workpiece clamping head, the right workpiece clamping head, the left piston pipe and the right piston pipe are all located on the same straight line, the left workpiece clamping head and the right workpiece clamping head are respectively clamped at the left end and the right end of a workpiece to be machined, one end of a bent inner hole in the workpiece to be machined is communicated with the left piston pipe through the left workpiece clamping head, and the other end of the bent inner hole in the workpiece to be machined is communicated with the right piston pipe through the right workpiece clamping head;

a hexagonal abrasive particle flow joint is further fixed on the right bidirectional connecting seat, the hexagonal abrasive particle flow joint is connected with an external abrasive particle flow generating device with an abrasive particle flow control valve through a pipeline, and the hexagonal abrasive particle flow joint is communicated with a piston cavity on one side, close to a workpiece to be processed, of the right piston pipe;

stator coil assembly includes three-phase stator coil and stator coil fixing base, stator coil fixing base is the annular setting, and stator coil fixing base fixed mounting is on the right side fixing base, and three-phase stator coil fixes at stator coil fixing base and encircles the setting of treating the processing work piece.

Furthermore, the left bidirectional connecting seat is provided with a left threaded joint and a right threaded joint, the fixed end of the left movable joint is provided with an internal thread matched with the right threaded joint on the left bidirectional connecting seat, and the left movable joint is fixedly connected with the left bidirectional connecting seat through the matching of the internal thread and the right threaded joint on the left bidirectional connecting seat; the right bidirectional connecting seat is provided with a left threaded joint and a right threaded joint, the fixed end of the right movable joint is provided with an internal thread matched with the left threaded joint on the right bidirectional connecting seat, and the right movable joint is fixedly connected with the right bidirectional connecting seat through the matching of the internal thread and the left threaded joint on the right bidirectional connecting seat.

Further, the left workpiece clamping head is sleeved with a left conductive slip ring, the right workpiece clamping head is sleeved with a right conductive slip ring, copper rings are arranged inside the left workpiece clamping head and the right workpiece clamping head respectively, the left conductive copper ring is communicated with the copper ring inside the left workpiece clamping head through a wire, the right conductive copper ring is communicated with the copper ring inside the right workpiece clamping head through a wire, and the left conductive copper ring and the right conductive copper ring are respectively connected with the positive electrode and the negative electrode of an external square wave alternating current power supply.

Further, left side work piece holding head and right side work piece holding head all include cylindric stiff end and the installation end that is used for installing the work piece, be provided with on the fixed end of left side work piece holding head with the internal thread matched with external screw thread on the rotatory pipeline in left side, the stiff end of left side work piece holding head passes through external screw thread and the internal thread cooperation and the two-way connecting seat fixed connection in left side on the rotatory pipeline in left side, be provided with on the fixed end of right side work piece holding head with the internal thread matched with external screw thread on the rotatory pipeline in right side, the stiff end of right side work piece holding head passes through external screw thread and the internal thread cooperation and the two-way connecting seat fixed connection in.

Furthermore, the mounting ends of the left workpiece clamping head and the right workpiece clamping head are designed in a copying manner, different copying ends are designed for different workpieces, and two ends of the workpiece to be processed are respectively in sealing connection with the mounting ends of the left workpiece clamping head and the right workpiece clamping head.

Further, a sleeve is further sleeved on the right rotary pipeline, and the sleeve on the right rotary pipeline is arranged between the right rotary joint and the right bearing seat; still the cover is equipped with the sleeve on the rotatory pipeline of left side, and the sleeve setting on the rotatory pipeline of left side is between left rotary joint and left side bearing frame.

A rotary polishing method for polishing by using liquid metal in an electromagnetic field of a rotary polishing device for polishing by using liquid metal in the electromagnetic field specifically comprises the following steps:

the method comprises the following steps: fixing one end of a workpiece to be machined in a right workpiece clamping head, starting a guide rail driving motor, driving the whole body consisting of a sliding block and a movable plate of a horizontal linear module to move along a straight line through a coupler, enabling a left workpiece clamping head to be gradually close to the other end of the workpiece to be machined until the workpiece to be machined is clamped between the left workpiece clamping head and the right workpiece clamping head, completely sealing the two ends of the workpiece to be machined with the left workpiece clamping head and the right workpiece clamping head, stopping the guide rail driving motor at the moment, and respectively communicating the two ends of a bent inner hole on the workpiece to be machined with the insides of the left workpiece clamping head and the right workpiece clamping head;

step two: injecting a liquid metal abrasive grain mixed solution into the whole device through a hexagonal abrasive grain flow joint by using an abrasive grain flow generating device connected with the hexagonal abrasive grain flow joint through a pipeline until the interior of a bent inner hole on a workpiece to be processed is filled with the liquid metal abrasive grain mixed solution;

step three: respectively connecting inflation ports of the right side inflatable piston cover and the left side inflatable piston cover with inflation devices with control valves, performing interval air supply on inflation cavities in the right side inflatable piston cover and the left side inflatable piston cover by controlling the opening and closing of the control valves, closing the control valves connected with the left side inflatable piston cover when the control valves connected with the right side inflatable piston cover are opened, and closing the control valves connected with the right side inflatable piston cover when the control valves connected with the left side inflatable piston cover are opened, so that the pistons connected with the left piston rod and the right piston rod are pushed to move continuously left and right, and liquid metal abrasive grain mixed liquid in a bent inner hole on a workpiece to be processed is pushed to reciprocate left and right;

step four: a rotary driving motor is started, and the rotary driving motor drives the right rotary pipeline to rotate through a synchronous belt mechanism consisting of a driving belt wheel, a synchronous belt and a driven belt wheel, so as to drive the workpiece to be processed to rotate;

step four: the three-phase alternating current is switched on for the three-phase stator coil, the three-phase alternating current enables the three-phase stator coil to generate a rotating magnetic field, and the liquid metal in the liquid metal abrasive particle mixed solution starts to rotate under the action of the rotating magnetic field, so that abrasive particle flow in the liquid metal abrasive particle mixed solution is driven to randomly impact the processing surface of the bent inner hole on the workpiece to be processed back and forth;

step five: after a certain time, the bent inner hole on the workpiece to be machined is machined, the three-phase alternating current is cut off, the guide rail driving motor is started to enable the workpiece clamping head on the left side to move backwards, the workpiece to be machined is taken down, the liquid metal abrasive particle mixed liquid in the whole device is poured out, and the whole bent inner hole polishing process is completed.

Further, when waiting to process the work piece and making by metal material, open external square wave alternating current power supply, for copper ring switch-on square wave alternating current on left side work piece holding head and the right side work piece holding head, because it is metal material to wait to process the work piece, make things convenient for the alternating current finally to use in the liquid metal of liquid metal abrasive particle mixed liquid, make liquid metal take place axial fluctuation, further make the abrasive particle in the liquid metal abrasive particle mixed liquid take place axial vibration, the process becomes more unordered when making a round trip to polish the crooked hole on waiting to process the work piece.

The invention has the beneficial effects that: .

1. According to the invention, the polishing of the bent inner hole on the machined workpiece printed by 3D can be realized by controlling the liquid metal, the automation of the polishing of the bent inner hole is realized, the labor cost is saved, and higher polishing precision can be obtained by automatic machining, so that the efficiency is greatly improved.

2. According to the invention, the inner hole of the workpiece is polished by mixing the abrasive particles in the liquid metal, so that higher polishing precision can be obtained, and the liquid metal in the liquid metal abrasive particle mixed liquid can be controlled to a certain degree, so that the polishing is more sufficient.

3. The three-phase stator coil is assembled outside the machined workpiece, then the three-phase alternating current is switched on to generate a rotating magnetic field, and the rotating magnetic field applied by the three-phase stator coil drives the liquid metal in the liquid metal abrasive particle mixed solution in the machined workpiece to rotate, so that the abrasive particles in the liquid metal abrasive particle mixed solution continuously polish the inner hole of the workpiece.

4. According to the invention, an electric field which changes axially is formed in the liquid metal abrasive particle mixed liquid by applying square wave alternating current, so that the liquid metal abrasive particle mixed liquid is more disordered and disordered in the polishing process, and the dead angle-free polishing of the bent inner hole of the workpiece is realized by combining with the rotating magnetic field, and the polishing quality is also ensured.

5. Under the combined action of the changing magnetic field and the electric field, the liquid metal in the liquid metal abrasive particle mixed liquid can drive abrasive particles mixed in the liquid metal abrasive particle mixed liquid to better and more fully process the inner hole of the workpiece, and the movement efficiency is higher than that of the traditional piston.

6. According to the invention, the three-phase stator coil is assembled outside the processed workpiece, then the three-phase alternating current is switched on to generate a rotating magnetic field, the rotating magnetic field applied by the three-phase stator coil drives the liquid metal in the processed workpiece to rotate, the rotating direction of the magnetic field is opposite to that of the workpiece, the polishing efficiency of abrasive particle flow is increased, the polishing precision is greatly improved due to the reverse rotation of the magnetic field and the workpiece, and the polishing quality is ensured.

Drawings

FIG. 1 is a schematic view showing the overall structure of a rotary polishing apparatus for polishing liquid metal under an electromagnetic field according to the present invention.

FIG. 2 is a top view of a rotary polishing apparatus for polishing with liquid metal in an electromagnetic field according to the present invention.

Fig. 3 is a schematic structural view of the right half of the rotating clamp assembly of the present invention.

Fig. 4 is a schematic cross-sectional view of the right half of the rotating clamp assembly of the present invention.

Figure 5 is a schematic structural view of a first embodiment of a left or right workpiece holding head of the present invention.

Figure 6 is a schematic structural view of a second embodiment of a left or right workpiece holding head of the present invention.

Figure 7 is a schematic structural view of a third embodiment of a left or right workpiece holding head of the present invention.

In the figure, 1-guide rail driving motor, 2-coupler, 3-horizontal linear module, 4-movable plate, 5-left lead wire, 6-left conductive slip ring, 7-left workpiece clamping head, 8-stator coil fixing seat, 9-right bearing seat, 10-synchronous belt, 11-right rotary joint, 12-hexagonal abrasive particle flow joint, 13-left side inflatable piston cover, 14-left piston rod, 15-right side inflatable piston cover, 16-left piston tube, 17-left side bidirectional connecting seat, 18-left rotary joint, 19-left bearing seat, 20-three-phase stator coil, 21-right conductive slip ring, 22-right lead wire, 23-rotary driving motor, 24-right side bidirectional connecting seat, 25-right piston tube, 26-right piston rod, 27-driven pulley, 28-right workpiece clamping head, 29-copper ring, 30-O-shaped sealing ring, 31-right rotary pipeline, 32-deep groove ball bearing, 33-sleeve, 34-right piston, 35-right fixed seat, 36-inflation port and 37-piston retaining ring.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

as shown in fig. 1 to 7, a rotary polishing apparatus using liquid metal for polishing in an electromagnetic field includes a sliding guide clamping assembly, a rotary clamping assembly, and a stator coil assembly.

Slide rail clamping components includes guide rail driving motor 1, horizontal linear module 3, shaft coupling 2, motor cabinet and fly leaf 4, 3 horizontal installation of horizontal linear module are on table surface, and guide rail driving motor 1 passes through the motor cabinet to be fixed in the one end of horizontal linear module 3, and guide rail driving motor 1's output shaft passes through shaft coupling 2 and connects horizontal linear module 3, fly leaf 4 is fixed on horizontal linear module 3's slider, and the slider and the fly leaf 4 of the horizontal linear module 3 of drive during the motion of guide rail driving motor 1 are at horizontal direction linear motion.

Rotatory centre gripping subassembly includes left side two-way connecting seat 17, right side two-way connecting seat 24, left piston pipe 16, right piston pipe 25, left piston rod 14, right piston rod 26, left side inflatable piston lid 13, right side inflatable piston lid 15, left side work piece clamping head 7, right side work piece clamping head 28, rotary driving motor 23, driving pulley, driven pulley 27, hold-in range 10, left-handed adapter 18, right rotary joint 11, left side rotary pipe way, right side rotary pipe way 31, left side bearing frame 19, right side bearing frame 9 and right side fixing base 35, right side fixing base 35 is fixed on table surface, right side bearing frame 9 and the 24 fixed mounting of right side two-way connecting seat in on the right side fixing base 35, left side bearing frame 19 and left side two-way connecting seat 17 fixed mounting be in on fly leaf 4.

One end of the left piston tube 16 is fixedly connected to one end of the left bidirectional connecting base 17, the other end of the left bidirectional connecting base 17 is connected to a fixed end of the left rotary joint 18, a movable end of the left rotary joint 18 is connected to one end of a left rotary pipeline, the left rotary pipeline is supported on the left bearing seat 19 through the deep groove ball bearing 32, the other end of the left rotary pipeline is fixedly connected to the left workpiece clamping head 7, the other end of the left piston tube 16 is sleeved with the left inflating piston cover 13, the left piston is arranged in the left piston tube 16, one end of the left piston rod 14 is connected to the left piston, the other end of the left piston rod 14 penetrates through the left inflating piston cover 13 and extends out of the left inflating piston cover 13, an inflating cavity communicated with an inner cavity of the left piston tube 16 is arranged on the left inflating piston cover 13, and an inflating port 36 communicated with the inflating cavity is arranged on the left inflating, the inflation inlet 36 of the left inflation piston cover 13 is connected with an external inflation device with a control valve through an inflation pipeline. The end of the left piston tube 16 is provided with a piston stop ring for placing the left piston to be exposed outside the left piston tube 16.

The one end fixed connection of right piston pipe 25 is in the one end of the two-way connecting seat 24 in right side, and the stiff end of right rotary joint 11 is connected to the other end of the two-way connecting seat 24 in right side, the one end of right swivel joint 31 is connected to the expansion end of right swivel joint 11, right swivel joint 31 supports on right bearing 9 through deep groove ball bearing 32, and the other end and the right work piece holder 28 fixed connection of right swivel joint 31, the other end cover of right piston pipe 25 is equipped with right side inflatable piston lid 15, and right piston 34 sets up in right piston pipe 25, and right piston 34 is connected to the one end of right piston rod 26, and the other end of right piston rod 26 passes right side inflatable piston lid 15 and stretches out outside right side inflatable piston lid 15, be provided with the inflation chamber that is linked together with the inner chamber of right piston pipe 25 on the right side inflatable piston lid 15, be provided with the inflation inlet 36 that is linked, the charging opening 36 of the right-hand charging piston cover 15 is connected via a further charging line to an external charging device with a control valve. The end of the right piston tube 25 is provided with a piston stop ring 37 for preventing the right piston from being exposed to the outside of the right piston tube 25.

The rotary driving motor 23 is fixed on the right fixed seat 35, the driving pulley is installed on the output shaft of the rotary driving motor 23, the driven pulley 27 is fixed on the right rotary pipeline 31, and the driving pulley and the driven pulley 27 are connected through the synchronous belt 10.

The axial lead of left side two-way connecting seat 17, right side two-way connecting seat 24, left side rotary pipeline, right side rotary pipeline 31, left rotary joint 18, right rotary joint 11, left side work piece holding head 7, right side work piece holding head 28, left piston tube 16 and right piston tube 25 all is located same straight line, left side work piece holding head 7 and right side work piece holding head 28 centre gripping are treating both ends about the work piece of processing respectively, and the one end of treating the crooked hole on the work piece of processing is linked together through left side work piece holding head 7 and left piston tube 16, and the other end of treating the crooked hole on the work piece of processing is linked together through right side work piece holding head 28 and right piston tube 25.

The right bidirectional connecting seat 24 is further fixed with a hexagonal abrasive particle flow joint 12, the hexagonal abrasive particle flow joint 12 is connected with an external abrasive particle flow generating device with an abrasive particle flow control valve through a pipeline, and the hexagonal abrasive particle flow joint 12 is communicated with a piston cavity on one side, close to a workpiece to be processed, of the right piston tube 25.

Stator coil assembly includes three-phase stator coil 20 and stator coil fixing base 8, stator coil fixing base 8 is the annular setting, and 8 fixed mounting of stator coil fixing base are on right side fixing base 35, and three-phase stator coil 20 is fixed at stator coil fixing base 8 and is encircleed the setting of treating the processing work piece.

The left bidirectional connecting seat 17 is provided with a left threaded joint and a right threaded joint, the fixed end of the left movable joint is provided with an internal thread matched with the right threaded joint on the left bidirectional connecting seat 17, and the left movable joint is matched with the right threaded joint on the left bidirectional connecting seat 17 through the internal thread and is fixedly connected with the left bidirectional connecting seat 17; the right bidirectional connecting seat 24 is provided with a left threaded joint and a right threaded joint, the fixed end of the right movable joint is provided with an internal thread matched with the left threaded joint on the right bidirectional connecting seat 24, and the right movable joint is matched with the left bidirectional connecting seat 24 and fixedly connected with the right bidirectional connecting seat 24 through the internal thread and the left threaded joint on the right bidirectional connecting seat 24.

The left workpiece clamping head 7 is sleeved with a left conductive slip ring 6, the right workpiece clamping head 28 is sleeved with a right conductive slip ring 21, copper rings 29 are arranged inside the left workpiece clamping head 7 and the right workpiece clamping head 28, the left conductive copper ring 29 is communicated with the copper ring 29 inside the left workpiece clamping head 7 through a wire, the right conductive copper ring 29 is communicated with the copper ring 29 inside the right workpiece clamping head 28 through a wire, and the left conductive copper ring 29 and the right conductive copper ring 29 are respectively connected with the positive electrode and the negative electrode of an external square wave alternating current power supply through a left wire 5 and a right wire 22.

Left side work piece holding head 7 and right side work piece holding head 28 all include cylindric stiff end and the installation end that is used for installing the work piece, be provided with on the fixed end of left side work piece holding head 7 with the internal thread matched with external screw thread on the rotatory pipeline in left side, the stiff end of left side work piece holding head 7 passes through the internal thread cooperation and the two-way connecting seat 17 fixed connection in left side on external screw thread and the left side rotatory pipeline, be provided with on the fixed end of right side work piece holding head 28 with the internal thread matched with external screw thread on the rotatory pipeline 31 in right side, the stiff end of right side work piece holding head 28 passes through the internal thread cooperation and the two-way connecting seat 24 fixed connection in right side on external.

The installation ends of the left workpiece clamping head 7 and the right workpiece clamping head 28 are designed in a copying manner, different copying ends are designed for different workpieces, the shapes of the two ends of the workpiece to be machined can be designed into circular, triangular and square shapes, and other arbitrary copying shapes can be designed, the installation is only required to be guaranteed to be sealed, and the two ends of the workpiece to be machined are respectively connected with the installation ends of the left workpiece clamping head 7 and the right workpiece clamping head 28 in a sealing manner. The left workpiece clamping head 7 and the right workpiece clamping head 28 are both provided with O-ring seals 30 for sealing with the workpiece to be machined.

The sleeve 33 is sleeved on the right rotary pipeline 31, and the sleeve 33 on the right rotary pipeline 31 is arranged between the right rotary joint 11 and the right bearing seat 9; the sleeve 33 is further sleeved on the left rotary pipeline, and the sleeve 33 on the left rotary pipeline is arranged between the left rotary joint 18 and the left bearing seat 19.

The rotary polishing method for polishing by using the liquid metal in the electromagnetic field based on the rotary polishing device for polishing by using the liquid metal in the electromagnetic field specifically comprises the following steps:

the method comprises the following steps: fixing one end of a workpiece to be machined in a right workpiece clamping head 28, starting a guide rail driving motor 1, driving the whole body consisting of a sliding block and a movable plate 4 of a horizontal linear module 3 to move along a straight line through a coupler 2, enabling a left workpiece clamping head 7 to gradually approach to the other end of the workpiece to be machined until the workpiece to be machined is clamped between the left workpiece clamping head 7 and the right workpiece clamping head 28, completely sealing two ends of the workpiece to be machined between the left workpiece clamping head 7 and the right workpiece clamping head 28, stopping the guide rail driving motor 1 at the moment, and respectively communicating two ends of a bent inner hole on the workpiece to be machined with the insides of the left workpiece clamping head 7 and the right workpiece clamping head 28;

step two: injecting a liquid metal abrasive grain mixed solution into the whole device through the hexagonal abrasive grain flow joint 12 by using an abrasive grain flow generating device connected with the hexagonal abrasive grain flow joint 12 through a pipeline until the interior of a bent inner hole on a workpiece to be processed is filled with the liquid metal abrasive grain mixed solution, and stopping injecting the liquid metal abrasive grain mixed solution;

step three: respectively connecting the inflating ports 36 of the right inflating piston cover 15 and the left inflating piston cover 13 with inflating devices with control valves, performing interval air supply on inflating cavities in the right inflating piston cover 15 and the left inflating piston cover 13 by controlling the opening and closing of the control valves, closing the control valve connected with the left inflating piston cover 13 when the control valve connected with the right inflating piston cover 15 is opened, and closing the control valve connected with the right inflating piston cover 15 when the control valve connected with the left inflating piston cover 13 is opened, so that the pistons connected with the left piston rod 14 and the right piston rod 26 are pushed to continuously move left and right, and liquid metal abrasive grain mixed liquid in a bent inner hole on a workpiece to be processed is pushed to reciprocate left and right;

step four: the rotary driving motor 23 is started, and the rotary driving motor 23 drives the right rotary pipeline 31 to rotate through a synchronous belt mechanism consisting of a driving belt wheel, a synchronous belt 10 and a driven belt wheel 27, so as to drive the workpiece to be processed to rotate;

step four: the three-phase alternating current is switched on for the three-phase stator coil 20, the three-phase alternating current enables the three-phase stator coil 20 to generate a rotating magnetic field, and the liquid metal in the liquid metal abrasive particle mixed solution starts to rotate under the action of the rotating magnetic field, so that abrasive particle flow in the liquid metal abrasive particle mixed solution is driven to randomly impact the processing surface of the bent inner hole on the workpiece to be processed back and forth;

step five: after a certain time, the bent inner hole on the workpiece to be machined is machined, three-phase alternating current is cut off, the guide rail driving motor 1 is started to enable the workpiece clamping head 7 on the left side to move back, the workpiece to be machined is taken down, liquid metal abrasive particle mixed liquid in the whole device is poured out, and the whole bent inner hole polishing process is completed.

When the workpiece to be machined is made of a metal material, the external square wave alternating current power supply is turned on, square wave alternating current is conducted to the copper rings 29 on the left workpiece clamping head 7 and the right workpiece clamping head 28, the workpiece to be machined is made of the metal material, and the alternating current can be conveniently applied to liquid metal of the liquid metal abrasive particle mixed liquid finally to enable the liquid metal to generate axial fluctuation, so that abrasive particles in the liquid metal abrasive particle mixed liquid vibrate axially, and the process of the abrasive particles becomes more disordered when the abrasive particles polish the bent inner hole on the workpiece to be machined back and forth.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, so long as the technical solutions can be realized on the basis of the above embodiments without creative efforts, which should be considered to fall within the protection scope of the patent of the present invention.