Electromagnetic type multi-pipe-fitting abrasive self-circulation magnetic grinding machining device and electromagnetic type multi-pipe-fitting abrasive self-circulation magnetic grinding machining method

Abstract

The invention discloses an electromagnetic type multi-pipe grinding material self-circulation magnetic grinding machining device and method, and relates to the field of magnetic grinding machining, the technical scheme is that the device comprises a clamping assembly, a grinding assembly and an automatic grinding material supplementing assembly, the clamping assembly comprises an upper chuck and a lower chuck, the upper chuck is provided with a plurality of driving clamping pieces, and the lower chuck is provided with a plurality of driving clamping pieces; a plurality of driven clamping pieces corresponding to the driving clamping pieces in position are rotationally connected to the lower chuck, the driving clamping pieces can do circular motion around the centers of the driving clamping pieces, and the driving clamping pieces and the driven clamping pieces clamp the two ends of a pipe fitting correspondingly. The grinding assembly comprises a support, a plurality of electromagnets fixedly connected to the support and a driving assembly used for driving the support to do linear reciprocating motion, the electromagnets and the pipe fittings are arranged at intervals during grinding, and the automatic grinding material supplementing assembly is used for injecting magnetic mixed grinding liquid into the pipe fittings. By arranging the clamping assembly, the grinding assembly and the automatic abrasive supplementing assembly, multiple pipe fittings can be machined at the same time, the machining efficiency is high, and the device is suitable for batch machining.

Description

Technical Field

[0001] The invention relates to the field of magnetic grinding processing, and more specifically, to an electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device and method. Background Art

[0002] More and more precision pipes are used in high-tech industries such as aerospace, electronic communications, automobile manufacturing, and medical machinery. Traditional grinding methods are difficult to meet the high-quality and efficient processing requirements of the inner surface of pipes, while magnetic grinding technology uses the magnetic effect of magnetic field and free magnetic mixed abrasives to process the inner surface. With the continuous updating and iteration of magnetic grinding technology, its processing efficiency and precision are also constantly upgraded, but traditional magnetic grinding technology usually only grinds one pipe, and the abrasive is not easy to automatically update online. After long-term grinding, the magnetic grinding processing performance is reduced, thereby reducing the grinding efficiency. Summary of the invention

[0003] In view of the shortcomings of the prior art, the object of the present invention is to provide a magnetic grinding processing device and method with electromagnet multi-tube abrasive self-circulation.

[0004] The above technical purpose of the present invention is achieved through the following technical scheme: it includes a clamping assembly, a grinding assembly and an automatic abrasive replenishing assembly, the clamping assembly includes an upper chuck and a lower chuck, the upper chuck is provided with a plurality of active clamping members, the lower chuck is rotatably connected with a plurality of passive clamping members corresponding to the positions of the active clamping members, the active clamping members can make circular motion around the center, the active clamping members and the passive clamping members respectively clamp the two ends of the pipe fitting, the grinding assembly includes a bracket, a plurality of electromagnets fixedly connected to the bracket and a driving assembly for driving the bracket to reciprocate linearly, the electromagnets and the pipe fitting are arranged at intervals during grinding, the automatic abrasive replenishing assembly is used to inject magnetic mixed grinding liquid into the inside of the pipe fitting, the active clamping member can close the upper end of the pipe fitting, and the passive clamping member can close the lower end of the pipe fitting.

[0005] Furthermore, the active clamping member includes a three-jaw chuck and a rotating motor, the active clamping member is rotatably connected to the lower surface of the upper chuck, the output shaft of the rotating motor is connected to the three-jaw chuck, and the passive clamping member is a centering chuck, and the passive clamping member is rotatably connected to the upper surface of the lower chuck.

[0006] Furthermore, the driving assembly includes a stepper motor, a screw rod connected to the output shaft of the stepper motor, and a guide rail. The bracket is provided with a guide rail hole matching the guide rail. The guide rail and the bracket are slidably connected. The bracket is provided with a ball nut matching the screw rod.

[0007] Furthermore, the automatic abrasive replenishment component includes a liquid reservoir, a pump and a hose for conveying magnetic mixed grinding fluid. One end of the hose is connected to the liquid reservoir, and the other end passes through the lower chuck and leads to the passive clamping part. During grinding, the hose is connected to the inside of the pipe.

[0008] Furthermore, the clamping assembly includes a lifting assembly, and the lifting assembly can drive the upper chuck to perform lifting movement.

[0009] Furthermore, the lifting assembly includes a second stepper motor, the output end of the second stepper motor is connected to a second screw rod, the second screw rod is provided with a second ball nut, and the two ends of the upper chuck are respectively fixedly connected to the two second ball nuts.

[0010] Furthermore, the electromagnet includes an electromagnet frame, an iron core and a magnetic pole head. The iron core is fixedly connected to the electromagnet frame and passes through the electromagnet frame. The magnetic pole head is detachably connected to both ends of the iron core. The magnetic pole head includes different length sizes, and the length size of the magnetic pole head can be selected according to the diameter of the pipe fitting.

[0011] Furthermore, it also includes a control board, which is electrically connected to the electromagnet and the automatic abrasive replenishment component, the control board is electrically connected to the rotating motor, and the control board is electrically connected to the stepper motor. The control board can control the magnitude of the current passed through the electromagnet and thus control the magnetic field strength. The control board can control the start and stop of the automatic abrasive replenishment component, and the control board can control the start and stop of the rotating motor and the stepper motor as well as the forward and reverse rotation.

[0012] Furthermore, the number of the active clamping members and the number of the passive clamping members are both 8, and the active clamping members are arranged along the central circumference of the upper chuck.

[0013] A grinding method, using the electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device and method as described above to perform grinding processing, comprises the following steps: Step 1, fix eight pipe fittings to be processed on the upper chuck through active clamping parts; Step 2, adjust the position of the upper chuck so that the bottom of the pipe is close to the lower chuck; Step 3, adjusting the passive clamping member so that the passive clamping member clamps the bottom of the pipe fitting; Step 4, starting the abrasive automatic replenishing component to deliver a certain amount of abrasive to the inner wall of the pipe through the hose; Step 5, starting the rotating motor to rotate the pipe around its central axis; Step 6, start the stepper motor to make the grinding assembly perform linear reciprocating motion along the length direction of the pipe; Step 7, when the grinding assembly moves to the bottom, the electromagnet is powered off, and the automatic grinding liquid replenishment program is started. A certain amount of grinding liquid is added to the bottom of the pipe by controlling the pump. After replenishment, the electromagnet is powered on, and the stepper motor is started to move the grinding assembly to the top. Then the stepper motor is reversed to move the grinding assembly to the bottom, and this step is repeated.

[0014] Step 8, after accumulating 30min-45min of processing, start the automatic chip removal mode, cut off the power of the electromagnet, start the stepper motor to move the grinding assembly to the uppermost end, then energize the electromagnet, start the stepper motor to move the grinding assembly to the bottommost end; repeat the above steps 4-5 times.

[0015] In summary, the present invention has the following beneficial effects: 1. It can process multiple pipes at the same time, with high processing efficiency, suitable for batch processing.

[0016] 2. It has the function of automatically removing wear debris. Through the periodic power-off and power-on of the electromagnet, the wear debris in the pipe can be collected to the lowest end of the pipe.

[0017] 3. The opening and closing functions of the pump and electromagnet are used to realize the automatic replenishment of abrasives during the inner wall processing of the pipe, which can maintain the stability of grinding.

[0018] 4. It can process the inner wall of pipes with various diameters, and process pipes with different diameters by adjusting the length of the magnetic poles in the electromagnet.

[0019] 6. Use electromagnet for grinding. By controlling the current of the electromagnet, the magnetic field strength can be changed, thereby controlling the hardness of the magnetic mixed grinding fluid to adapt to the processing of pipes of different materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the electromagnet in the present invention.

[0021] In the figure: 1. upper chuck; 2. lower chuck; 3. active clamping member; 4. passive clamping member; 5. bracket; 6. electromagnet; 7. driving assembly; 8. three-jaw chuck; 9. rotating motor; 10. stepping motor 1; 11. screw 1; 12. guide rail; 13. liquid reservoir; 14. pump; 15. hose; 16. lifting assembly; 17. automatic abrasive replenishing assembly; 18. electromagnet frame; 19. iron core; 20. magnetic pole head. DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Embodiment 1, an electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device and method, such as Figure 1 As shown, an electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device and method, including a clamping assembly, a grinding assembly and an abrasive automatic replenishing assembly 17, the clamping assembly includes an upper chuck 1 and a lower chuck 2, the upper chuck 1 is provided with a plurality of active clamping members 3, the lower chuck 2 is rotatably connected with a plurality of passive clamping members 4 corresponding to the positions of the active clamping members 3, the active clamping members 3 can make a circular motion around the center, the active clamping members 3 and the passive clamping members 4 respectively clamp the two ends of the tube, the grinding assembly includes a bracket 5, a plurality of electromagnets 6 fixedly connected to the bracket 5 and a driving assembly 7 for driving the bracket 5 to reciprocate linearly, the active clamping member 3 can close the upper end of the tube, and the passive clamping members 4 can be rotated to rotate and connect the lower chuck 2 to the active clamping members 3. The clamping member 4 can close the lower end of the pipe fitting. During grinding, the electromagnet 6 and the pipe fitting are arranged at intervals. The automatic abrasive replenishing component 17 is used to inject magnetic mixed grinding liquid into the inner wall of the pipe fitting. The number of active clamping members 3 and passive clamping members 4 is 8. Each active clamping member 3 is arranged along the central circumference of the upper chuck 1. The active clamping members 3 and passive clamping members 4 correspond to each other up and down. The upper and lower ends of the same pipe fitting are fixed respectively by the upper and lower corresponding active clamping members 3 and passive clamping members 4. The electromagnet 6 on the bracket 5 moves up and down after being energized, and the active clamping member 3 makes a circular motion around its center, which can realize the simultaneous grinding of multiple pipe fittings, has better grinding efficiency, and can realize mass production.

[0024] The active clamping member 3 includes a three-jaw chuck 8 and a rotating motor 9. The active clamping member 3 is rotatably connected to the lower surface of the upper chuck 1. The output shaft of the rotating motor 9 is connected to the three-jaw chuck 8. The passive clamping member 4 is a centering chuck. The passive clamping member 4 is rotatably connected to the upper surface of the lower chuck 2, thereby realizing the circular motion of the active clamping member 3.

[0025] The driving assembly 7 includes a stepper motor 10, a screw rod 11 connected to the output shaft of the stepper motor 10, and a guide rail 12. A guide rail 12 hole matching the guide rail 12 is opened on the bracket 5. The guide rail 12 and the bracket 5 are slidably connected. A ball nut 1 matching the screw rod 11 is provided on the bracket 5. The linear reciprocating motion of the bracket 5 is realized by the forward and reverse rotation of the stepper motor 10.

[0026] The abrasive automatic replenishment component 17 includes a liquid reservoir 13, a pump 14 and a hose 15 for conveying a magnetic mixed grinding liquid. One end of the hose 15 is connected to the liquid reservoir 13, and the other end passes through the lower chuck 2 and leads to the passive clamping part 4. During grinding, the hose 15 is connected to the inside of the pipe, thereby realizing automatic replenishment of the magnetic mixed grinding liquid.

[0027] The clamping assembly includes a lifting assembly 16, which can drive the upper chuck 1 to perform lifting movement. The lifting assembly 16 includes a stepper motor 2, the output end of the stepper motor 2 is connected to a screw rod 2, and a ball nut 2 is arranged on the screw rod 2. The two ends of the upper chuck 1 are respectively fixedly connected to the two ball nuts 2. The upper chuck 1 is lifted, which can facilitate the clamping of the upper end of the pipe fitting on the active clamping member 3. Moreover, the distance between the upper chuck 1 and the lower chuck 2 can be changed by the lifting assembly 16, so as to realize the grinding of pipe fittings of different lengths. After the pipe fitting is installed between the active clamping member 3 and the passive clamping member 4, the lifting assembly 16 can further compress the distance between the upper chuck 1 and the lower chuck 2, so that the gap between the pipe fitting and the active clamping member 3 and the passive clamping member 4 is smaller, thereby making the pipe fitting better sealed by the active clamping member 3 and the passive clamping member 4.

[0028] The electromagnet 6 includes an electromagnet frame 18, an iron core 19 and a magnetic pole head 20. The iron core 19 is fixedly connected to the electromagnet frame 18 and penetrates the electromagnet frame 18. The magnetic pole head 20 is detachably connected to the two ends of the iron core 19 by threads. A plurality of magnetic pole heads 20 are arranged on a side away from the iron core 19. The magnetic pole head 20 includes different length sizes. The length size of the magnetic pole head 20 can be selected according to the diameter of the pipe fitting. For pipe fittings of different diameters, the magnetic pole head 20 can be as close to the pipe fitting as possible, so that the magnetic field strength at the pipe fitting is greater, and it has better applicability to pipe fittings of different diameters.

[0029] It also includes a control board, which is electrically connected to the electromagnet 6 and the automatic abrasive replenishing component 17, the control board is electrically connected to the rotating motor 9, and the control board is electrically connected to the stepper motor 10. The control board can control the current of the electromagnet 6, the control board can control the start and stop of the automatic abrasive replenishing component 17, and the control board can control the start and stop of the rotating motor 9 and the stepper motor 10 as well as the forward and reverse rotation of the rotating motor 9 and the stepper motor 10.

[0030] A grinding method comprises the following steps: Step 1, fix eight pipes to be processed on the upper chuck 1 through the active clamping member 3; Step 2, adjust the position of the upper chuck 1 so that the bottom of the pipe is close to the lower chuck 2; Step 3, adjusting the passive clamping member 4 so that the passive clamping member 4 clamps the bottom of the pipe fitting; Step 4, start the abrasive automatic replenishing component 17 to transport a certain amount of abrasive into the pipe through the hose 15; Step 5, starting the rotary motor 9 to rotate the pipe around its central axis; Step 6, start the stepper motor 10 to make the grinding assembly perform linear reciprocating motion along the length direction of the pipe; Step 7, when the grinding assembly moves to the bottom, the electromagnet 6 is powered off, and the automatic grinding liquid replenishment program is started. A certain amount of grinding liquid is replenished to the bottom of the pipe by controlling the pump. After replenishment, the electromagnet 6 is powered on, and the stepper motor 10 is started to move the grinding assembly to the top. Then the stepper motor 10 is reversed to move the grinding assembly to the bottom, and this step is repeated. By periodically powering off and on the electromagnet 6, the magnetic mixed grinding liquid periodically changes between the solid-liquid states, so that the abrasive in the magnetic mixed grinding liquid can be evenly distributed on the inner wall of the pipe diameter.

[0031] Step 8, after accumulating 30 minutes of processing, start the automatic chip removal mode, cut off the power of electromagnet 6, start the stepper motor 10 to move the grinding assembly to the top, then energize the electromagnet 6, start the stepper motor 10 to move the grinding assembly to the bottom; repeat the above steps 4-5 times; in the automatic chip removal mode, the electromagnet 6 is not energized when it rises, and is energized when it descends, which can bring the iron chips attached to the inner wall of the pipe to the bottom of the pipe, making the inner wall of the pipe smoother after grinding.

[0032] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device and method, characterized in that: The invention comprises a clamping assembly, a grinding assembly and an automatic abrasive replenishing assembly (17), wherein the clamping assembly comprises an upper chuck (1) and a lower chuck (2), wherein a plurality of active clamping members (3) are arranged on the upper chuck (1), and a plurality of passive clamping members (4) corresponding to the positions of the active clamping members (3) are rotatably connected to the lower chuck (2), wherein the active clamping members (3) can make circular motion around the center thereof, and the active clamping members (3) and the passive clamping members (4) respectively clamp the two ends of the pipe fitting, and the grinding assembly comprises a bracket (5), a plurality of electromagnets (6) fixedly connected to the bracket (5), and a driving assembly (7) for driving the bracket (5) to reciprocate linearly, wherein the electromagnets (6) and the pipe fitting are arranged at intervals during grinding, and the automatic abrasive replenishing assembly (17) is used to inject a magnetic mixed grinding liquid into the pipe fitting, wherein the active clamping members (3) can seal the upper end of the pipe fitting, and the passive clamping members (4) can seal the lower end of the pipe fitting.

2. The electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device and method according to claim 1 is characterized in that: The active clamping member (3) comprises a three-jaw chuck (8) and a rotating motor (9); the active clamping member (3) is rotatably connected to the lower surface of the upper chuck (1); the output shaft of the rotating motor (9) is connected to the three-jaw chuck (8); the passive clamping member (4) is a centering chuck; and the passive clamping member (4) is rotatably connected to the upper surface of the lower chuck (2).

3. The electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device and method according to claim 1 is characterized in that: The driving assembly (7) comprises a stepper motor (10), a screw rod (11) connected to an output shaft of the stepper motor (10), and a guide rail (12); a guide rail (12) hole matching the guide rail (12) is provided on the bracket (5); the guide rail (12) and the bracket (5) are slidably connected; and a ball nut (1) matching the screw rod (11) is provided on the bracket (5).

4. The electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device and method according to claim 1, characterized in that: The abrasive automatic replenishing assembly (17) comprises a liquid reservoir (13), a pump (14) and a hose (15) for conveying magnetic mixed grinding liquid. One end of the hose (15) is connected to the liquid reservoir (13), and the other end passes through the lower chuck (2) and leads to the passive clamping member (4). During grinding, the hose (15) is connected to the inside of the pipe.

5. The electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device and method according to claim 1, characterized in that: The clamping assembly comprises a lifting assembly (16), and the lifting assembly (16) can drive the upper clamping plate (1) to perform lifting movement.

6. The electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device and method according to claim 5, characterized in that: The lifting assembly (16) comprises a second stepper motor, the output end of the second stepper motor is connected to a second screw rod, the second screw rod is provided with a second ball nut, and the two ends of the upper chuck (1) are respectively fixedly connected to the two second ball nuts.

7. The electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device and method according to claim 1, characterized in that: The electromagnet (6) comprises an electromagnet frame (18), an iron core (19) and a magnetic pole head (20); the iron core (19) is fixedly connected to the electromagnet frame (18) and penetrates the electromagnet frame (18); the magnetic pole head (20) is detachably connected to both ends of the iron core (19); the magnetic pole head (20) comprises different length sizes, and the length size of the magnetic pole head (20) can be selected according to the diameter of the pipe fitting.

8. An electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device and method according to any one of claims 1 to 3, characterized in that: The invention also includes a control panel, wherein the control panel is electrically connected to the electromagnet (6) and the automatic abrasive replenishment component (17), the control panel is electrically connected to the rotating motor (9), and the control panel is electrically connected to the stepping motor (10). The control panel can control the magnitude of the current flowing into the electromagnet (6) and thus control the magnetic field strength. The control panel can control the start and stop of the automatic abrasive replenishment component (17), and the control panel can control the start and stop of the rotating motor (9) and the stepping motor (10) as well as the forward and reverse rotation.

9. An electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device and method according to any one of claims 1 to 3, characterized in that: The number of the active clamping members (3) and the number of the passive clamping members (4) are both 8, and the active clamping members (3) are arranged along the central circumference of the upper chuck (1).

10. A grinding method, using the electromagnetic multi-tube abrasive self-circulating magnetic grinding processing device as claimed in any one of claims 1 to 8 for grinding, comprising the following steps: Step 1, fix eight pipe fittings to be processed on the upper chuck (1) through active clamping parts (3); Step 2, adjusting the position of the upper chuck (1) so that the bottom of the pipe is in close contact with the lower chuck (2); Step 3, adjusting the passive clamping member (4) so ​​that the passive clamping member (4) clamps the bottom of the pipe fitting; Step 4, starting the abrasive automatic replenishing component (17) to transport a certain amount of abrasive to the inner wall of the pipe through the hose (15); Step 5, starting the rotary motor (9) to rotate the pipe around its central axis; Step 6, start the stepper motor 1 (10) to make the grinding assembly perform linear reciprocating motion along the length direction of the pipe; Step 7, when the grinding assembly moves to the bottom, the electromagnet (6) is powered off, and the automatic grinding liquid replenishment program is started. A certain amount of grinding liquid is replenished to the bottom of the pipe by controlling the pump. After replenishment, the electromagnet (6) is powered on, and the stepper motor 1 (10) is started to move the grinding assembly to the top. Then, the stepper motor 1 (10) is reversed to move the grinding assembly to the bottom, and this step is repeated. Step 8, after a cumulative processing time of 30 minutes to 45 minutes, the automatic chip removal mode is started, the electromagnet (6) is powered off, the stepper motor 1 (10) is started to move the grinding assembly to the uppermost end, and then the electromagnet (6) is powered on, the stepper motor 1 (10) is started to move the grinding assembly to the lowermost end; and the above steps are repeated 4 to 5 times.

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