High-precision workpiece outer circle grinding process

Abstract

The application discloses a high-precision workpiece outer circle grinding process. The steel ring is fixedly clamped from the inner side of the whole circumferential surface at the fixed station, so that the inner circle deformation or the steel ring is not crushed due to uneven distribution of the clamping area is prevented, the problem of uneven stress of the steel ring in the grinding process is ensured, and the grinding precision is ensured. Meanwhile, the feeding and discharging of the steel ring is also optimally designed, the steel ring is fixed by magnetic attraction, and the feeding and discharging before and after the grinding is completed by automatically taking and placing the steel ring in cooperation with the clamping of the whole circumferential surface. The grinding wheel in the application can be adjusted or fixed in the front and back positions and the left and right positions, and the fixed station can be adjusted in the front and back positions and the left and right positions.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of bearing processing, and particularly relates to a high-precision workpiece outer circle grinding processing technology. BACKGROUND

[0002] A bearing is an important part in contemporary mechanical equipment, and its main function is to support a mechanical rotating body, reduce the friction coefficient in the movement process of the mechanical rotating body, and ensure the rotation precision. When the outer diameter of a bearing ring is processed, a general three-jaw chuck is usually used for bearing ring grinding processing, the three-jaw chuck expands the inner diameter of the bearing ring from the inside to the outside, and in the case that the wall thickness of the bearing ring is sufficient, the radial deformation of the bearing ring caused by the clamping force of the three points can be ignored, and the processing precision is within a controllable range. However, when the wall thickness of the bearing ring is thin, the bearing ring will produce great radial deformation, thereby affecting the roundness. If the pressure is too large, the bearing ring will be crushed, and if the pressure is too small, the bearing ring will not be clamped tightly, and will be easily offset during grinding processing. In addition, due to the structure of the chuck, uneven stress will be generated during grinding processing, and these factors will directly affect the processing precision. SUMMARY

[0003] In order to solve the above technical problems, the inventors have summarized and obtained the technical scheme of the present application through practice, and the present application adopts the following technical scheme:

[0004] A high-precision workpiece outer circle grinding processing technology, and the processing steps are as follows:

[0005] S100, grinding station ring fixing:

[0006] The steel ring is fed to the fixing station, the fixing station is provided with a steel ring fixing mechanism, the steel ring fixing mechanism drives the steel ring to rotate at high speed, and the inner side of the steel ring is fixed by the steel ring fixing mechanism;

[0007] S200, steel ring outer diameter grinding:

[0008] The grinding motor drives the grinding wheel to rotate at high speed, the position of the grinding wheel and the steel ring fixing mechanism is adjustable, the grinding wheel is used for steel ring outer circle grinding operation until the outer diameter size meets the design size, and then the steel ring is taken out.

[0009] Preferably, the steel ring fixing mechanism comprises a mounting frame I, a servo motor and a rotating disc are mounted on the mounting frame I, the servo motor drives the rotating disc to rotate at high speed through a rotating shaft, a central rod, radial guide grooves I arranged on the left and right sides of the central rod, radial guide grooves II arranged on the upper and lower sides of the central rod are mounted on the middle part of the side of the rotating disc opposite to the rotating shaft, a reset disc and a driving disc are sleeved on the central rod, the reset disc is located between the driving disc and the rotating disc, a guide rod is arranged on the side of the reset disc opposite to the rotating disc, the guide rod is arranged on the periphery of the central rod, one end of the guide rod penetrates through the rotating disc and is connected with a stop head, springs are sleeved on the guide rod between the reset disc and the rotating disc.

[0010] The driving disc comprises a main disc body and a secondary disc body, elastic expansion rods are arranged between the main disc body and the secondary disc body and on the periphery of the central rod.

[0011] An inner support I is slidably mounted in the radial guide groove I, and the inner support I is connected with the secondary disc body through a rotating rod I; an inner support II is slidably mounted in the radial guide groove II, and the inner support II is connected with the main disc body through a rotating rod II.

[0012] The central rod is provided with a limiting body which is adjustable relative to the position of the central rod, and the limiting body is located on the side of the main disc body opposite to the secondary disc body, and the limiting body is used for locking and fixing the position of the main disc body relative to the rotating disc.

[0013] Preferably, a blind hole is arranged in the middle part of one end of the central rod, a spring is mounted in the blind hole, an axial slot is arranged at the root of the blind hole, guide grooves corresponding in position are arranged on the opposite sides of the axial slot, and a recess is arranged at the end of the guide grooves away from the blind hole.

[0014] The limiting body comprises a slide pin and a sleeve, the slide pin is arranged in the blind hole and abuts against the end of the spring, a hollow rod is mounted at the end of the slide pin in the blind hole, an elastic hook is arranged at the end of the hollow rod, the elastic hook is adapted in the guide groove and the recess, and the inside of the hollow rod is provided with a pulling rope for pulling the elastic hook.

[0015] A counterbore is arranged at the end of the slide pin away from the spring, a T-shaped rod body is slidably mounted in the counterbore, and a through hole is arranged at the root of the counterbore, the T-shaped rod body is connected and fixed with the end of the pulling rope away from the elastic hook, and an acting block is mounted at the end of the T-shaped rod body.

[0016] The sleeve is fixed on the outside of the slide pin and is sleeved on the outside of the central rod, the end of the sleeve is used for acting on the main disc body, and the acting block is located on the side of the sleeve away from the main disc body.

[0017] A check ring is arranged on the inside of one end of the sleeve, and the check ring is used for sleeving on the outside of the T-shaped rod body to limit the T-shaped rod body in the counterbore.

[0018] Preferably, the elastic hook head comprises a T-shaped hook head and an elastomer, the small head of the T-shaped hook head penetrates through the elastomer and is inserted into the end of the hollow rod, and the small head of the T-shaped hook head and the pulling rope are connected and fixed.

[0019] Preferably, the outer sides of the inner support body one and the inner support body two are provided with flexible pads, the flexible pads are matched with the inner groove of the steel ring, the flexible pads are composed of two symmetrically distributed flexible pieces, and the opposite side of the flexible piece is fixedly provided, and the side away from the inner support body is provided with a flexible body bent and deformed to both sides.

[0020] Preferably, the steel ring full circumference surface fixing step in the S100 step is as follows:

[0021] The steel ring is axially sleeved on the outer sides of the inner support body one and the inner support body two and the end surface is attached to the rotary disc, the sleeve is axially close to the rotary disc, the end of the sleeve acts on the main disc body, due to the existence of the elastic expansion rod between the main disc body and the auxiliary disc body, the reset disc and the main disc body and the auxiliary disc body move close to the rotary disc, the rotating rod one drives the inner support body one to expand outward along the radial guide groove one, the rotating rod two drives the inner support body two to expand outward along the radial guide groove two, until the spring between the reset disc and the rotary disc does not deform, and at this time the elastic expansion rod does not have any deformation, and at this time the rotating rod one supports the inner support body one on the inner wall of the steel ring;

[0022] Subsequently, with the sleeve continuing to move axially close to the rotary disc, the elastic expansion rod begins to deform, the rotating rod two drives the inner support body two to expand outward along the radial guide groove two, the inner support body two moves outward relative to the inner support body one, until the inner support body two is supported on the inner wall of the steel ring, at this time the two ends of the inner support body two are respectively inserted between the two ends of the inner support body one and the end surface is in abutting state;

[0023] At this time, in the process of the sleeve continuing to move axially close to the rotary disc, the slide pin continuously compresses the spring, and in the process the T-shaped hook head of the elastic hook head moves to the sink groove along the guide groove and is inserted into the sink groove under the action of the elastomer, the sleeve and the slide pin are locked;

[0024] When the inner support body one and the inner support body two are supported on the inner wall of the steel ring, the flexible pad will act on the position of the inner groove of the steel ring and protect the inner groove of the steel ring, and at the same time avoid the axial deviation of the steel ring in the grinding process.

[0025] Preferably, in the S200 step, the specific steps of taking down the steel ring are as follows:

[0026] By moving the action block to the side away from the rotary disc, and through the pulling rope action to extrude the T-shaped hook head from the elastic body, until the T-shaped hook head is separated from the sink, when completely separated, the spring in the center rod will act on the slide pin to move outward away from the rotary disc, the sleeve moves outward with the slide pin, until it returns to the initial position, at the same time, the main disc body, reset disc, vice disc body will restore the inner support body one and the inner support body two to the initial position under the action of the elastic telescopic rod and the spring.

[0027] Preferably, when the steel ring is fed, a steel ring manipulator is used for automatic feeding and automatic discharging, the steel ring manipulator comprising an X-axis linear module, a Y-axis linear module, a Z-axis linear module and a clamping assembly, the X-axis linear module, the Y-axis linear module and the Z-axis linear module being used for adjusting the three-dimensional coordinate position of the clamping assembly, the clamping assembly comprising a taking and placing frame, the taking and placing frame being embedded with an electromagnet one and an electromagnet two, the electromagnet one being used for magnetically attracting and fixing the steel ring, the taking and placing frame being provided with a clamping piece and an axial hole, the side of the axial hole being provided with a side guide groove arranged circumferentially along the length of the hole, the clamping piece being movably mounted in the axial hole through a spring and the side of the clamping piece being provided with an ear plate, the ear plate and the side guide groove being slidably fitted, the electromagnet two being used for attracting and clamping the clamping piece and driving the clamping piece to rotate, and the clamping piece being used for selectively fitting with the action block.

[0028] Preferably, the steel ring feeding step is as follows:

[0029] The three-dimensional position of the clamping assembly is adjusted to the side of the taking and placing frame to be attached to the end face of the steel ring by controlling the X-axis linear module, the Y-axis linear module and the Z-axis linear module, the steel ring is attracted and fixed by the electromagnet one after being powered on, and the three-dimensional position of the clamping assembly is adjusted to the outside of the inner support body one and the inner support body two by controlling the X-axis linear module, the Y-axis linear module and the Z-axis linear module, while the end face is attached to the rotary disc, the steel ring falls on the outside of the inner support body one and the inner support body two by the de-energization of the electromagnet one.

[0030] Preferably, when the steel ring is taken down, the three-dimensional position of the clamping assembly is adjusted to the end face of the steel ring to be attached to the taking and placing frame by controlling the X-axis linear module, the Y-axis linear module and the Z-axis linear module, the electromagnet one and the electromagnet two are powered on at the same time, the steel ring is magnetically attracted and fixed by the electromagnet one, the clamping piece is attracted by the electromagnet two, the clamping piece extrudes the spring in the axial hole, and simultaneously moves circumferentially along the side guide groove through the ear plate, the clamping piece rotates, the clamping piece blocks the action block and pulls it outward during the rotation process, the locking state of the sleeve and the slide pin is contacted, the whole circumferential surface of the steel ring is fixedly contacted, until the rotation degree, the clamping piece is automatically separated from the action block during the rotation process, the electromagnet two is de-energized after the steel ring is taken away, and the clamping piece is reset to the initial position under the action of the spring.

[0031] The three-dimensional position of the clamping assembly is adjusted to the position of the steel ring at the discharging station by controlling the X-axis linear module, the Y-axis linear module and the Z-axis linear module, and the steel ring is released by de-energizing the electromagnet one.

[0032] Compared with the prior art, the present application has the following beneficial effects:

[0033] The present application fixes and clamps the steel ring from the inner side of the whole circumference at the fixed station, prevents the inner circle from changing or the steel ring from being crushed due to uneven distribution of the clamping area, ensures uneven force of the steel ring in the grinding process, and ensures the grinding precision. Meanwhile, the feeding and discharging of the steel ring are also optimized, the steel ring is fixed by magnetic attraction, and the automatic taking and placing of the steel ring are realized by cooperation of the whole circumference clamping to complete the feeding and discharging before and after the grinding. The grinding wheel in the present application can be adjusted or fixed in the front and back positions, and the fixed station can be adjusted in the front and back positions. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0035] Figure 2 It is a back side view of the processing equipment of the present application;

[0036] Figure 3 It is a horizontal sectional view of the structure of the ring fixing mechanism;

[0037] Figure 4 It is a horizontal sectional view of the structure of the ring fixing mechanism; Figure 3

[0038] Figure 5 It is a vertical sectional view of the structure of the ring fixing mechanism;

[0039] Figure 6 It is a horizontal sectional view of the taking and placing frame;

[0040] Figure 7 It is a vertical sectional view of the taking and placing frame.

[0041] ​In the figure: 10, grinding motor; 20, grinding wheel; 30, mounting frame one; 31, servo motor; 311, rotating shaft; 32, rotating disc; 321, center rod; 322, radial guide groove one; 323, radial guide groove two; 324, reset disc; 325, guide rod; 326, main disc body; 327, auxiliary disc body; 328, elastic telescopic rod; 329, inner support one; 3210, rotating rod one; 3211, inner support two; 3212, rotating rod two; 3213, guide groove; 3214, sink groove; 3215, sliding pin; 3216, sleeve; 3217, hollow rod; 3218, elastic hook head; 32181, T-shaped hook head; 32182, elastic body; 3219, pull rope; 3220, T-shaped rod body; 3221, action block; 40, X-axis linear module; 50, Y-axis linear module; 70, Z-axis linear module; 80, taking and placing frame; 81, electromagnet one; 82, electromagnet two; 821, side guide groove; 83, clamping piece; 831, ear plate; 84, axial hole. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0043] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0044] Embodiment 1, as shown in the figure, a high-precision workpiece cylindrical grinding process, the processing steps are as follows: Figures 1 to 7

[0045] S100, grinding station steel ring fixation:

[0046] The steel ring is fed to the fixed station, and a steel ring fixing mechanism is arranged at the fixed station. The steel ring fixing mechanism drives the steel ring to make high-speed rotary motion, and the inner side full circumference of the steel ring is fixed by the steel ring fixing mechanism.

[0047] S200, steel ring outer diameter grinding:

[0048] The grinding motor 10 drives the grinding wheel 20 to rotate at high speed, and the positions of the grinding wheel 20 and the steel ring fixing mechanism are relatively adjustable. The grinding wheel 20 grinds the workpiece to the design size, and the steel ring is removed. ​

[0049] As Figures 3 to 5 shown, the steel ring fixing mechanism includes a mounting frame 30, a servo motor 31 and a rotating disc 32 are mounted on the mounting frame 30, the servo motor 31 drives the rotating disc 32 to rotate at high speed through a rotating shaft 311, a center rod 321 and radial guide grooves one 322 arranged on the left and right sides of the center rod 321 and radial guide grooves two 323 arranged on the upper and lower sides of the center rod 321 are mounted on the middle part of the side of the rotating disc 32 opposite to the rotating shaft 311, a reset disc 324 and a driving disc are sleeved on the center rod 321, the reset disc 324 is located between the driving disc and the rotating disc 32, a guide rod 325 is arranged on the side of the reset disc 324 opposite to the rotating disc 32, the guide rod 325 is arranged in multiple and uniformly distributed on the periphery of the center rod 321, and one end of the guide rod 325 penetrates through the rotating disc 32 and is connected with a stop head, a spring is sleeved on the guide rod 325 between the reset disc 324 and the rotating disc 32;

[0050] The driving disc includes a main disc body 326 and a secondary disc body 327, and elastic expansion rods 328 are arranged between the main disc body 326 and the secondary disc body 327 and are arranged in multiple groups and uniformly distributed on the periphery of the center rod 321;

[0051] An inner support body one 329 is slidably installed in the radial guide groove one 322, and the inner support body one 329 and the secondary disc body 327 are connected through a rotating rod one 3210; an inner support body two 3211 is slidably installed in the radial guide groove two 323, and the inner support body two 3211 and the main disc body 326 are connected through a rotating rod two 3212;

[0052] The center rod 321 is provided with a limiting body which is adjustable in position relative to the center rod 321, the limiting body is located on the side of the main disc body 326 opposite to the secondary disc body 327, and the limiting body is used for locking and fixing the position of the main disc body 326 relative to the rotating disc 32.

[0053] One end of the center rod 321 is provided with a blind hole, a spring is installed in the blind hole, an axial slot is arranged at the root of the blind hole, a guide groove 3213 corresponding in position is arranged on the opposite side of the axial slot, and a sunken groove 3214 is arranged at the end of the guide groove 3213 away from the blind hole;

[0054] The limiting body includes a slide pin 3215 and a sleeve 3216, the slide pin 3215 is arranged in the blind hole and abuts against the end part of the spring, a hollow rod 3217 is installed at the end part of the slide pin 3215 in the blind hole, an elastic hook head 3218 is arranged at the end part of the hollow rod 3217, the elastic hook head 3218 is adapted in the guide groove and the sunken groove 3214, and a pulling rope 3219 is arranged in the hollow rod 3217 to pull the elastic hook head 3218;

[0055] The sliding pin 3215 is provided with a counter bore at the end opposite to the spring, a T-shaped rod 3220 is slidingly installed in the counter bore, and a through hole is provided at the bottom of the counter bore, the T-shaped rod 3220 is fixedly connected with the end of the pulling rope 3219 away from the elastic hook head 3218, and an acting block 3221 is installed at the end of the T-shaped rod 3220;

[0056] The sleeve 3216 is fixed outside the sliding pin 3215 and sleeved outside the center rod 321, the end of the sleeve 3216 is used for acting on the main disc body 326, and the acting block 3221 is located at the side of the sleeve 3216 away from the main disc body 326;

[0057] The inner side of one end of the sleeve 3216 is provided with a check ring, which is used for sleeving outside the T-shaped rod 3220 to limit the T-shaped rod 3220 located in the counter bore.

[0058] The elastic hook head 3218 comprises a T-shaped hook head 32181 and an elastic body 32182, the small head of the T-shaped hook head 32181 penetrates through the elastic body 32182 and is inserted into the end of the hollow rod 3217, and the small head of the T-shaped hook head 32181 and the pulling rope 3219 are fixedly connected.

[0059] The outer sides of the inner support body one 329 and the inner support body two 3211 are provided with flexible gaskets, the flexible gaskets are matched with the inner grooves of the steel ring, the flexible gaskets are composed of two symmetrically distributed flexible pieces, the opposite sides of the flexible pieces are fixedly provided, and the sides away from the inner support bodies are provided with flexible bodies bent and deformed to two sides. For protecting the inner grooves, while preventing axial deviation during grinding process.

[0060] The steel ring full circumferential surface fixing step in the S100 step is as follows:

[0061] The steel ring is axially sleeved outside the inner support body one 329 and the inner support body two 3211 and the end surface is attached to the rotary disc 32, the sleeve 3216 is axially close to the rotary disc 32, the end of the sleeve 3216 acts on the main disc body 326, because the elastic expansion rod 328 exists between the main disc body 326 and the auxiliary disc body 327, the reset disc 324 and the main disc body 326 and the auxiliary disc body 327 move close to the rotary disc 32 together, the rotating rod one 3210 drives the inner support body one 329 to expand outward along the radial guide groove one 322, the rotating rod two 3212 drives the inner support body two 3211 to expand outward along the radial guide groove two 323, until the spring between the reset disc 324 and the rotary disc 32 is not deformed, until the elastic expansion rod 328 does not have any deformation at this time, and at this time the rotating rod one 3210 supports the inner support body one 329 on the inner wall of the steel ring;

[0062] Subsequently, as the sleeve 3216 continues to move axially close to the turntable 32, the elastic telescopic rod 328 begins to deform, the rotating rod two 3212 drives the inner support two 3211 to expand outward along the radial guide groove two 323, the inner support two 3211 moves outward relative to the inner support one 329, and the inner support two 3211 is supported on the inner wall of the steel ring, at this time, the two ends of the inner support two 3211 are respectively inserted vertically between the two ends of the inner support one 329 and the end faces are in abutting state;

[0063] At this time, the sleeve 3216 continues to move axially close to the turntable 32, the slide pin 3215 continuously compresses the spring, and the T-shaped hook head 32181 of the elastic hook head 3218 moves along the guide groove to the sink groove 3214, and is inserted into the sink groove 3214 under the action of the elastic body 32182, the sleeve 3216 and the slide pin 3215 are locked;

[0064] When the inner support one 329 and the inner support two 3211 are supported on the inner wall of the steel ring, the flexible gasket acts on the position of the steel ring inner channel and protects the steel ring inner channel, and avoids the axial deviation of the steel ring during the grinding process.

[0065] In the S200 step, the specific steps of removing the steel ring are as follows:

[0066] By moving the action block 3221 to the side away from the turntable 32, and extruding the elastic body 32182 of the T-shaped hook head 32181 through the pulling rope 3219, until the T-shaped hook head 32181 is separated from the sink groove 3214, when completely separated, the spring in the center rod 321 will move the slide pin 3215 outward away from the turntable 32, the sleeve 3216 moves outward together with the slide pin 3215, until it returns to the initial position, at the same time, the main disc body 326, the reset disc 324 and the vice disc body 327 will respectively restore the inner support one 329 and the inner support two 3211 to the initial position under the action of the elastic telescopic rod 328 and the spring.

[0067] Example 2, on the basis of example 1, the following improvements are made, such as Figure 6 and Figure 7As shown, when the steel ring is fed, the steel ring manipulator is used for automatic feeding and automatic discharging, the steel ring manipulator includes an X-axis linear module 40, a Y-axis linear module 50, a Z-axis linear module 70 and a clamping assembly, the X-axis linear module 40, the Y-axis linear module 50 and the Z-axis linear module 70 are used for adjusting the three-dimensional coordinate position of the clamping assembly, the clamping assembly includes a taking and placing frame 80, the taking and placing frame 80 is embedded with an electromagnet one 81 and an electromagnet two 82, the electromagnet one 81 is used for magnetically attracting and fixing the steel ring, the taking and placing frame 80 is provided with a clamping piece 83 and an axial hole 84, the side of the axial hole 84 is provided with a side guide groove 821 which is circumferentially arranged along the length direction of the hole, the clamping piece 83 is movably installed in the axial hole 84 through a spring and the side of the clamping piece 83 is provided with an ear plate 831, the ear plate 831 and the side guide groove 821 are slidably matched, the electromagnet two 82 is used for attracting and clamping the clamping piece 83 and driving the clamping piece 83 to rotate, and the clamping piece 83 is used for selectively matching with the acting block 3221.

[0068] The steel ring feeding step is as follows:

[0069] By controlling the X-axis linear module 40, the Y-axis linear module 50 and the Z-axis linear module 70 to adjust the three-dimensional position of the clamping assembly to the side of the taking and placing frame 80 to be attached to the end face of the steel ring, the electromagnet one 81 is powered on to attract and fix the steel ring, and then the X-axis linear module 40, the Y-axis linear module 50 and the Z-axis linear module 70 are controlled to adjust the three-dimensional position of the clamping assembly to the outside of the inner support one 329 and the inner support two 3211, while the end face is attached to the rotary disc 32, and the electromagnet one 81 is powered off to make the steel ring fall on the outside of the inner support one 329 and the inner support two 3211.

[0070] When the steel ring is taken down, the three-dimensional position of the clamping assembly is adjusted to the end face of the steel ring to be attached to the taking and placing frame 80 by controlling the X-axis linear module 40, the Y-axis linear module 50 and the Z-axis linear module 70, the electromagnet one 81 and the electromagnet two 82 are powered on at the same time, the electromagnet one 81 magnetically attracts and fixes the steel ring, the electromagnet two 82 attracts and clamps the clamping piece 83, the clamping piece 83 extrudes the spring in the axial hole 84, and at the same time, the clamping piece 83 moves circumferentially along the side guide groove 821 through the ear plate 831, the clamping piece 83 rotates, and in the rotating process, the clamping piece 83 blocks the acting block 3221 and pulls outward, the sleeve 3216 and the locking state of the slide pin 3215 are contacted, the whole circumferential surface of the steel ring is fixedly contacted, until the rotating motion is 180 degrees, and in the rotating process, the clamping piece 83 is automatically separated from the acting block 3221, the clamping piece 83 is reset to the initial position under the action of the spring, after the steel ring is taken away, the electromagnet two 82 is powered off;

[0071] Then the X-axis linear module 40, the Y-axis linear module 50 and the Z-axis linear module 70 are controlled to adjust the three-dimensional position of the clamping assembly to the position where the steel ring is discharged, and the electromagnet one 81 is powered off to release the steel ring.

[0072] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto. The alternatives can be partial structure, device, method step alternatives, or complete technical solutions. According to the technical solutions of the present application and the inventive concept, equivalent replacement or change should be covered within the protection scope of the present application.

Claims

1. A high-precision workpiece cylindrical grinding process, characterized in that: The processing steps are as follows: S100, Grinding station steel ring fixation: The steel ring is loaded onto the fixed station, where a steel ring fixing mechanism is provided. The steel ring fixing mechanism drives the steel ring to rotate at high speed, and fixes the inner circumference of the steel ring through the steel ring fixing mechanism. S200, steel ring outer diameter grinding: The grinding motor (10) drives the grinding wheel (20) to rotate at high speed. The positions of the grinding wheel (20) and the steel ring fixing mechanism are relatively adjustable. The grinding wheel (20) grinds the outer diameter of the steel ring until the outer diameter meets the design size, and then the steel ring is removed. The steel ring fixing mechanism includes a mounting frame (30), a servo motor (31) and a rotary disk (32) are mounted on the mounting frame (30), the servo motor (31) drives the rotary disk (32) to perform high-speed rotary motion via a rotary shaft (311), a center rod (321) and radial guide grooves (322) arranged on the left and right sides of the center rod (321) and radial guide grooves (323) arranged on the upper and lower sides of the center rod (321) are mounted on the middle part of the side of the rotary disk (32) facing away from the rotary shaft (311). A reset disk (324) and a driving disk are mounted on the center rod (321). The reset disk (324) is located between the driving disk and the rotary disk (32). A plurality of guide rods (325) are provided on one side of the reset disk (324) opposite to the rotary disk (32). The plurality of guide rods (325) are evenly distributed on the periphery of the center rod (321). One end of the guide rod (325) passes through the rotary disk (32) and is connected to a stopper. A spring is mounted on the guide rod (325) located between the reset disk (324) and the rotary disk (32). The driving disk includes a main disk body (326) and a sub-disk body (327), and elastic telescopic rods (328) are installed between the main disk body (326) and the sub-disk body (327). The elastic telescopic rods (328) are provided in multiple groups evenly distributed around the periphery of the central rod (321); An inner support body (329) is slidably mounted in the radial guide groove (322), and the inner support body (329) and the auxiliary disk body (327) are connected via a rotating rod (3210); an inner support body (3211) is slidably mounted in the radial guide groove (323), and the inner support body (3211) and the main disk body (326) are connected via a rotating rod (3212); A limiting body is provided on the center rod (321) and is adjustable relative to the center rod (321). The limiting body is located on the side of the main disk body (326) facing away from the auxiliary disk body (327). The limiting body is used to lock and fix the position of the main disk body (326) relative to the rotary disk (32).

2. A high-precision workpiece cylindrical grinding process according to claim 1, characterized in that: A blind hole is provided in the middle of one end of the center rod (321), a spring is installed in the blind hole, an axial notch is provided at the root of the blind hole, a guide groove (3213) corresponding in position is provided on the opposite side of the axial notch, and a sink groove (3214) is provided at the end of the guide groove (3213) away from the blind hole; The limiting body includes a sliding pin (3215) and a sleeve (3216). The sliding pin (3215) is arranged in the blind hole, and one end of the sliding pin (3215) located in the blind hole abuts against the end of the spring. A hollow rod (3217) is installed at the end of the sliding pin (3215) located in the blind hole. An elastic hook (3218) is provided at the end of the hollow rod (3217). The elastic hook (3218) is adapted to fit in the guide groove and the sink groove (3214). A pulling rope (3219) for pulling the elastic hook (3218) is provided inside the hollow rod (3217). A countersunk hole is provided at one end of the sliding pin (3215) facing away from the spring, a T-shaped rod (3220) is slidably installed inside the countersunk hole, and a through hole is provided at the root of the countersunk hole. The T-shaped rod (3220) is connected and fixed to the end of the pulling rope (3219) away from the elastic hook (3218), and an action block (3221) is installed at the end of the T-shaped rod (3220); The sleeve (3216) is fixed to the outside of the sliding pin (3215) and is sleeved on the outside of the center rod (321). The end of the sleeve (3216) is used to act on the main disk body (326), and the acting block (3221) is located on the side of the sleeve (3216) facing away from the main disk body (326). A retaining ring is provided on the inner side of one end of the sleeve (3216), and the retaining ring is used to be sleeved on the outer side of the T-shaped rod body (3220) to limit the T-shaped rod body (3220) located in the countersunk hole.

3. A high-precision workpiece cylindrical grinding process according to claim 2, characterized in that: The elastic hook head (3218) comprises a T-shaped hook head (32181) and an elastic body (32182). The small head of the T-shaped hook head (32181) passes through the elastic body (32182) and is inserted into the end of the hollow rod (3217). The small head of the T-shaped hook head (32181) is connected and fixed to the pulling rope (3219).

4. A high-precision workpiece cylindrical grinding process according to claim 3, characterized in that: The outer sides of the inner support body 1 (329) and the inner support body 2 (3211) are both provided with flexible gaskets, which are adapted to the inner channel of the steel ring. The flexible gaskets are composed of two symmetrically distributed flexible sheets, and the opposite sides of the flexible sheets are fixed, and the side away from the inner support body is provided with a flexible body that is bent and deformed to both sides.

5. A high-precision workpiece cylindrical grinding process according to claim 4, characterized in that: The steps for fixing the entire circumference of the steel ring in step S100 are as follows: The steel ring is axially sleeved on the outer sides of the inner support body 1 (329) and the inner support body 2 (3211) so that the end surface is fitted on the rotary disk (32). The sleeve (3216) is axially close to the rotary disk (32). The end of the sleeve (3216) acts on the main disk body (326). Due to the existence of the elastic telescopic rod (328) between the main disk body (326) and the auxiliary disk body (327), the reset disk (324) and the main disk body (326) and the auxiliary disk body (327) move together close to the rotary disk (32). The rotating rod (3210) drives the inner support body (329) to expand outward along the radial guide groove (322), and the rotating rod (3212) drives the inner support body (3211) to expand outward along the radial guide groove (323), until the spring between the reset disk (324) and the rotating disk (32) no longer deforms, and the elastic telescopic rod (328) does not have any deformation, and the rotating rod (3210) supports the inner support body (329) on the inner wall of the steel ring; Subsequently, as the sleeve (3216) continues to move axially toward the rotary disk (32), the elastic telescopic rod (328) begins to deform, and the rotating rod (3212) drives the inner support body (3211) to expand outward along the radial guide groove (323), and the inner support body (3211) moves outward relative to the inner support body (329) until the inner support body (3211) is supported on the inner wall of the steel ring. At this time, the two ends of the inner support body (3211) are respectively vertically inserted between the two ends of the inner support body (329) and the end faces are in abutment. At this time, as the sleeve (3216) continues to move axially toward the rotary disk (32), the sliding pin (3215) continues to compress the spring, and during the process, the T-shaped hook head (32181) of the elastic hook head (3218) moves along the guide groove to the sink groove (3214), and is inserted into the sink groove (3214) under the action of the elastic body (32182), and the sleeve (3216) and the sliding pin (3215) are locked; When the inner support body 1 (329) and the inner support body 2 (3211) are supported on the inner wall of the steel ring, the flexible gasket will act on the position of the inner groove of the steel ring and protect the inner groove of the steel ring, while preventing the steel ring from axially offsetting during the grinding process.

6. A high-precision workpiece cylindrical grinding process according to claim 5, characterized in that: In step S200, the specific steps for removing the steel ring are as follows: By moving the action block (3221) to the side away from the rotary disk (32), and through the action of the pulling rope (3219), the T-shaped hook head (32181) is squeezed by the elastic body (32182) until the T-shaped hook head (32181) is disengaged from the sink groove (3214). When it is completely disengaged, the spring in the center rod (321) will act on the sliding pin (3215) to move outward away from the rotary disk (32), and the sleeve (3216) moves outward together with the sliding pin (3215) until it returns to the initial position. At the same time, the main disk body (326), the reset disk (324), and the auxiliary disk body (327) will respectively restore the inner support body 1 (329) and the inner support body 2 (3211) to their initial positions under the action of the elastic telescopic rod (328) and the spring.

7. A high-precision workpiece cylindrical grinding process according to claim 6, characterized in that: When the steel ring is loaded, a steel ring manipulator is used for automatic loading and unloading. The steel ring manipulator includes an X-axis linear module (40), a Y-axis linear module (50), a Z-axis linear module (70) and a clamping assembly. The X-axis linear module (40), the Y-axis linear module (50), and the Z-axis linear module (70) are used to adjust the three-dimensional coordinate position of the clamping assembly. The clamping assembly includes a pick-up and placement rack (80). An electromagnet 1 (81) and an electromagnet 2 (82) are embedded on the pick-up and placement rack (80). The electromagnet 1 (81) is used to magnetically fix the steel ring. The pick-up and placement rack A clamping member (83) and an axial hole (84) are provided on (80), and a side guide groove (821) arranged circumferentially along the length direction of the hole is provided on the side of the axial hole (84). The clamping member (83) is installed in the axial hole (84) through a spring and an ear plate (831) is provided on the side of the clamping member (83). The ear plate (831) and the side guide groove (821) are slidably adapted. The second electromagnet (82) is used to adsorb the clamping member (83) and drive the clamping member (83) to rotate. The clamping member (83) is used to selectively adapt to the action block (3221).

8. A high-precision workpiece cylindrical grinding process according to claim 5, characterized in that: The steel ring loading steps are as follows: The three-dimensional position of the clamping assembly is adjusted by controlling the X-axis linear module (40), the Y-axis linear module (50), and the Z-axis linear module (70) until one side of the pick-up and placement frame (80) is attached to the end face of the steel ring. After the electromagnet 1 (81) is energized, the steel ring is adsorbed and fixed. Then, the X-axis linear module (40), the Y-axis linear module (50), and the Z-axis linear module (70) are controlled to adjust the three-dimensional position of the clamping assembly until the steel ring is sleeved on the outside of the inner support body 1 (329) and the inner support body 2 (3211), and the end face is attached to the turntable (32). The electromagnet 1 (81) is de-energized, causing the steel ring to fall on the outside of the inner support body 1 (329) and the inner support body 2 (3211).

9. A high-precision workpiece cylindrical grinding process according to claim 6, characterized in that: When the steel ring is removed, the three-dimensional position of the clamping assembly is adjusted by controlling the X-axis linear module (40), the Y-axis linear module (50), and the Z-axis linear module (70) until the end surface of the steel ring is attached to the pick-up and placement frame (80). The electromagnet 1 (81) and the electromagnet 2 (82) are energized at the same time. The electromagnet 1 (81) magnetically fixes the steel ring, and the electromagnet 2 (82) absorbs the clamping member (83). The clamping member (83) squeezes the spring in the axial hole (84), and at the same time, the spring is pushed along the side guide groove through the ear plate (831). (821) moves circumferentially, and the clamping member (83) rotates. During the rotation, the clamping member (83) blocks the action block (3221) and pulls it outward, contacting the locking state of the contact sleeve (3216) and the sliding pin (3215). The entire circumference of the steel ring is fixedly contacted until the rotation moves 180 degrees. During the rotation, it will automatically separate from the action block (3221). After the steel ring is removed, the electromagnet (82) is powered off, and the clamping member (83) is reset to the initial position under the action of the spring; Then, the X-axis linear module (40), the Y-axis linear module (50), and the Z-axis linear module (70) are controlled to adjust the three-dimensional position of the clamping assembly until the steel ring is at the discharge position, and the electromagnet 1 (81) is powered off to release the steel ring.

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