A bearing inner ring raceway grinding device and a grinding method

Abstract

The application provides a bearing inner ring raceway grinding device and a grinding method, and belongs to the technical field of bearing grinding. The bearing inner ring raceway grinding device comprises a machine tool and a machining table arranged in the machine tool, and further comprises: a feeding and discharging assembly arranged on the machining table, wherein the feeding and discharging assembly comprises a placing plate, and a magnetic disc is rotationally arranged on the placing plate; and a limiting support assembly arranged on the machining table, wherein the limiting support assembly comprises a limiting frame, a driving rod is rotationally arranged on the limiting frame, and a sliding rod is slidably arranged on the driving rod. The inner ring main driving rotation is driven by the magnetic disc, and slight contact is achieved between the supporting roller and the inner wall of the inner ring. When the inner ring deviates, the supporting roller can synchronously rotate and assist in maintaining the stable rotating speed of the inner ring, and dynamic compensation is achieved in cooperation with the floating support, so that the problems that the bearing is prone to deviation, rotating instability and even stop in the process of electromagnetic centerless floating grinding in the prior art are solved.

Description

Technical Field

[0001] This invention belongs to the field of bearing grinding technology, specifically relating to a bearing inner ring raceway grinding device and grinding method. Background Technology

[0002] Bearings are key components in mechanical transmission systems, playing a vital role in high-speed rotation, precision transmission, and load-bearing support. The roundness, surface roughness, and dimensional accuracy of the bearing's inner ring raceway directly affect the bearing's operational stability and service life. Therefore, precision grinding of the bearing's inner ring raceway is usually required using a grinding machine.

[0003] Chinese patent CN116197795B discloses a vertical grinding machine for fixing bearing rings using an electromagnetic centerless clamp. The machine includes a base, a housing, a cooling device, a moving device, a surface treatment device, and a fixing device. The housing and fixing device are both located above the base. The cooling device is located on one side of the fixing device, and the moving device is located on the inner wall of the housing. Compared to current vertical grinding machines, this invention uses automatic eccentric positioning to replace traditional manual positioning. Through a magnetic block and positioning mechanism, the bearing rings automatically rotate and correct their positioning when the electromagnetic chuck rotates. The fixing device in this invention not only automatically corrects the workpiece, is simple and practical to operate, and has a high degree of automation, but also facilitates fully automatic loading and unloading by a robotic arm. The grinding process is safe, reliable, and highly efficient, reducing the impact of human factors on the grinding efficiency and cost of bearing rings.

[0004] However, the above technical solution still has the following problems. Since the bearing rings are not rigidly clamped under electromagnetic centerless floating support, when the grinding wheel grinds the bearing raceway, the grinding force can easily cause the workpiece to shift slightly. After the shift, the local contact pressure between the workpiece and the support structure increases, which in turn increases the workpiece's rotational resistance, reduces the rotational speed, or even causes it to stop. At the same time, local clamping can also easily cause the workpiece to jam, reducing the workpiece's rotational stability. Ultimately, this can easily lead to grinding burns, vibration marks, increased roundness errors, and decreased machining accuracy on the raceway, thus affecting the stability of the bearing raceway grinding process. Summary of the Invention

[0005] The purpose of this invention is to provide a grinding device and grinding method for the inner ring raceway of a bearing, which aims to solve the problem in the prior art that bearings are prone to displacement during electromagnetic centerless floating grinding, leading to rotational instability or even stoppage.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bearing inner ring raceway grinding device, comprising: a machine tool and a processing table disposed inside the machine tool, and further comprising: The loading and unloading assembly is set on the processing table, and a disk is rotatably mounted on the loading and unloading assembly. A limiting support assembly is mounted on a processing table. The limiting support assembly includes a limiting frame, a drive rod rotatably mounted on the limiting frame, a slide rod slidably mounted on the drive rod, a snap-fit ​​connector on one side of the slide rod, and a snap-fit ​​groove on the disk that mates with the snap-fit ​​connector. A support frame is rotatably mounted on the limiting frame, a support roller is rotatably mounted on the support frame, a gear set is mounted on the drive rod to drive the support roller to rotate, and a sleeve is rotatably mounted on the limiting frame to control the rotation of the support frame. The detection and adjustment component is set on the limit support component. The detection and adjustment component includes a detection ring that is slidably set on the limit frame. The limit frame is equipped with a position detection device. An adjustment disk that can push the card connector to move is slidably set inside the disk. The grinding assembly, mounted on the machining table, is used for grinding the inner ring.

[0007] Its effect is that the inner ring is magnetically attracted by the disk and driven to rotate. With the help of the limit support component and the detection and adjustment component, the rotational stability of the inner ring during grinding can be improved.

[0008] A further technical solution of the present invention is that the loading and unloading assembly includes a placement plate, which is vertically mounted on a processing table. A disk is rotatably mounted on the placement plate. A loading rack and a unloading rack are provided on one side of the placement plate. A first drive frame is slidably mounted on the side of the placement plate away from the loading rack. A loading swing arm and a unloading swing arm are rotatably mounted on one side of the first drive frame. The loading swing arm and the unloading swing arm pass through the placement plate and extend to the side of the loading rack. A first drive unit is provided on the first drive frame. The disk passes through the placement plate and extends to the side of the loading rack. An electromagnetic frame is provided on the processing table. One end of the disk is connected to the electromagnetic frame. A second drive unit capable of controlling the fixed-axis rotation of the disk is provided on the electromagnetic frame. The disk is magnetic and located in the processing area.

[0009] A further technical solution of the present invention is that the limiting support assembly includes a limiting block and a floating block slidably disposed on the placement plate. A floating head is rotatably disposed on the side of the floating block near the inner ring. A first elastic element is connected to the pivot position of the floating head. The other end of the first elastic element is connected to the floating block. The side of the floating head facing the inner ring is set as V-shaped. Both the limiting block and the side of the floating head facing the inner ring are made of wear-resistant material.

[0010] A further technical solution of the present invention is that the limiting frame is disposed at one end of the unloading swing arm, one side of the limiting frame can be inserted into the inner ring, one end of the drive rod is connected to a second elastic element, the other end of the second elastic element is connected to the slide rod, the snap joint is disposed on the side of the slide rod away from the second elastic element, a guide ring is rotatably disposed on the slide rod, a sleeve is disposed outside the guide ring, a sliding post is disposed on the guide ring, and a spiral groove that cooperates with the sliding post is disposed inside the sleeve, the spiral groove being spirally disposed along the axial direction of the sleeve.

[0011] Its effect is that the drive rod and the disk rotate synchronously through the cooperation of the snap-fit ​​connector and the snap-fit ​​groove, and the rotation of the sleeve is controlled by the cooperation of the guide ring and the spiral groove, thereby improving the stability of the support roller unfolding.

[0012] A further technical solution of the present invention is that the gear set includes a main gear mounted on a drive rod, a connecting gear rotatably mounted on a limiting frame and meshing with the main gear, multiple sets of connecting gears evenly arranged around the main gear, a secondary gear meshing with the connecting gear on a support roller, a support frame swinging around the rotation axis of the connecting gear, a third elastic element mounted at the pivot position of the support frame, the other end of the third elastic element being connected to the limiting frame, multiple sets of push plates mounted on a sleeve, and a baffle plate cooperating with the push plates mounted on the support frame.

[0013] A further technical solution of the present invention is that the bottom of the detection ring is provided with an inclined block that cooperates with the support frame, the end of the support frame away from the baffle is always in contact with the bottom inclined surface of the inclined block, the position detection device cooperates with the detection ring, and one side of the detection ring passes through the limiting frame and extends into the interior of the position detection device.

[0014] A further technical solution of the present invention is that an adjustment disk is slidably disposed inside the disk, the adjustment disk penetrates the disk and extends to its outside, a push rod is provided at one end of the adjustment disk, the push rod penetrates the disk and is connected to the locking slot, a guide plate is slidably disposed on the outside of the disk, and the guide plate is rotatably engaged with the adjustment disk, and one end of the guide plate is connected to the electromagnetic frame.

[0015] Its effect is that by adjusting the disc to move the locking joint, the contact state between the support roller and the inner ring can be adjusted, thus avoiding excessive interference of the support roller with the normal rotation of the inner ring.

[0016] A further technical solution of the present invention is that the grinding assembly includes a grinding frame slidably disposed on the processing table, a grinding wheel rotatably disposed on the grinding frame, and a feeding rod disposed on the first drive frame, the feeding rod penetrating the placement plate and being flush with the side of the placement plate.

[0017] A method for grinding the raceway of a bearing inner ring includes the following steps: S1. Place the inner ring to be processed on the loading rack, and transport the inner ring to the processing area by the loading swing arm, and position it by magnetic adsorption by the disk. S2. The unloading swing arm drives the limit frame to insert into the inner ring, so that the snap-fit ​​connector engages with the snap-fit ​​slot, and the drive rod and the disk rotate synchronously. S3. The sleeve rotates to release the limit on the support frame. Under the action of the third elastic element, multiple sets of support rollers unfold and contact the inner wall of the inner ring for positioning. S4. The adjusting disc pushes the snap-fit ​​joint to move, so that the support roller and the inner ring maintain slight contact or gap, reducing interference with the normal rotation of the inner ring; S5. The grinding assembly drives the grinding wheel to approach the inner ring for grinding. When the inner ring deviates, the support roller assists in supporting and maintaining the stable rotation of the inner ring. S6. After the position detection device detects abnormal offset, it controls the grinding assembly to decelerate, stop, or retract the tool. After grinding is completed, the material is unloaded by the unloading swing arm.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a disk to drive the inner ring to rotate, and utilizes a support roller to make slight contact with the inner wall of the inner ring. When the inner ring deviates, the support roller can rotate synchronously and help maintain the stable rotation speed of the inner ring. At the same time, it works with a floating support for dynamic compensation, which solves the problem that bearings are prone to deviate, rotate unstably or even stop rotating in the electromagnetic centerless floating grinding process in the prior art, and improves grinding stability and machining accuracy.

[0019] 2. The position detection device monitors the rotation status of the support frame in real time by detecting the movement of the detection ring, and controls the dynamic retraction of the support rollers in conjunction with the adjustment disc. At the same time, it controls the grinding components to decelerate, stop or retract the tool. It can dynamically adjust the grinding process according to the grinding status of the inner ring, avoiding problems such as jamming, over-grinding and surface burning of the inner ring, thus improving the safety of the device and the reliability of processing. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the processing table in a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the placement plate in a specific embodiment of the present invention; Figure 5 This is a schematic diagram of the installation structure of the limiting block and the floating block in a specific embodiment of the present invention; Figure 6 This is a partial cross-sectional view of the disk in a specific embodiment of the present invention; Figure 7 This is an axonometric sectional view of the limiting frame in a specific embodiment of the present invention; Figure 8 This is a schematic diagram of the mating structure of the drive rod, slide rod, guide ring, and sleeve in a specific embodiment of the present invention; Figure 9 This is a schematic diagram of the limiting frame in a specific embodiment of the present invention; Figure 10 This is a partial structural diagram of the limiting support component in a specific embodiment of the present invention; Figure 11 This is a schematic diagram of the installation structure of the detection and adjustment component in a specific embodiment of the present invention; Figure 12 This is a schematic diagram of the cooperation structure between the support frame and the detection ring in a specific embodiment of the present invention; Figure 13 This is a schematic diagram of the installation structure of the disk, adjustment disk, and guide plate in a specific embodiment of the present invention.

[0021] In the diagram: 1. Machine tool; 2. Machining table; 3. Loading / unloading assembly; 31. Placement plate; 311. Loading rack; 312. Unloading rack; 32. First drive frame; 321. Loading swing arm; 322. Unloading swing arm; 33. Electromagnetic frame; 34. Disk disk; 341. Snap-fit ​​slot; 35. Unloading rod; 4. Limiting support assembly; 41. Limiting block; 42. Floating block; 421. Floating head; 422. First elastic element; 43. Limiting frame; 44. Drive rod; 441. Slide rod; 442. Second elastic element; 43. Snap-fit ​​connector; 444. Main gear; 445. Connecting gear; 45. Guide ring; 451. Sleeve; 452. Sliding column; 453. Spiral groove; 46. Support frame; 461. Support roller; 462. Secondary gear; 463. Third elastic element; 464. Push plate; 465. Baffle plate; 5. Detection and adjustment assembly; 51. Detection ring; 511. Inclined block; 52. Position detection device; 53. Adjustment disc; 531. Push rod; 54. Guide plate; 6. Grinding assembly; 61. Grinding frame; 62. Grinding wheel. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-13 The present invention provides the following technical solution: a bearing inner ring raceway grinding device, comprising a machine tool 1, a processing table 2, a loading and unloading assembly 3, a limiting support assembly 4, a detection and adjustment assembly 5, and a grinding assembly 6.

[0024] Machine tool 1 is placed horizontally on the ground. Machining table 2 is located inside machine tool 1. Machining table 2 is used to position and support the bearing inner ring and drive it to rotate for grinding. Loading / unloading assembly 3 is located on machining table 2. Loading / unloading assembly 3 automatically transports and loads the bearing inner ring, moving it to the machining position and removing it after grinding. Limiting support assembly 4 is located on machining table 2. Limiting support assembly 4 supports and limits the bearing inner ring and dynamically compensates for it during grinding, preventing displacement, jamming, or stopping. Detection and adjustment assembly 5 is located on limiting support assembly 4. Detection and adjustment assembly 5 detects the displacement and rotation states of the bearing inner ring during grinding and adjusts the grinding state based on the detection results to maintain stable grinding of the bearing inner ring. The grinding assembly 6 is set on the machining table 2. The grinding assembly 6 can perform grinding on the inner ring raceway of the bearing and adjust the grinding feed according to the grinding state of the inner ring of the bearing to improve the grinding stability and machining accuracy of the inner ring raceway of the bearing.

[0025] like Figures 1-4 As shown, the loading and unloading assembly 3 includes a placement plate 31 vertically mounted on the processing table 2. A loading rack 311 and a unloading rack 312 are provided on one side of the placement plate 31. The inner ring to be processed is first placed on the loading rack 311, then moved to the processing area for grinding. The processed inner ring is removed from the processing area and placed on the unloading rack 312. A first drive frame 32 is slidably mounted on the side of the placement plate 31 away from the loading rack 311. The first drive frame 32 can reciprocate along the upper surface of the processing table 2, moving closer to or away from the placement plate 31. A loading swing arm 321 and an unloading swing arm 322 are rotatably mounted on one side of the first drive frame 32. The loading swing arm 321 and the unloading swing arm 322 pass through the placement plate 31 and extend to one side of the loading rack 311. A first drive unit (not shown in the figure) is provided on the first drive frame 32. The first drive unit can control the reciprocating sliding of the first drive frame 32 and the rotation of the loading swing arm 321 and the unloading swing arm 322. By moving the first drive frame 32 closer to or further away from the placement plate 31, one end of the loading swing arm 321 can be rotated to the loading frame 311 position, and then the bearing inner ring is inserted for limiting and moved to the processing area. One end of the unloading swing arm 322 can be rotated to the processing area to limit the bearing inner ring, and then the processed bearing inner ring is moved out onto the unloading frame 312.

[0026] A disk 34 is rotatably mounted on the placement plate 31, extending through the placement plate 31 and to one side of the loading rack 311. An electromagnetic frame 33 is mounted on the processing table 2, located on one side of the first drive frame 32. One end of the disk 34 is connected to the electromagnetic frame 33. A second drive unit (not shown in the figure) is mounted on the electromagnetic frame 33, which controls the fixed-axis rotation of the disk 34. The disk 34 is magnetic and located in the processing area. After the inner ring to be ground moves to one end of the disk 34, the disk 34 can attract the inner ring. Subsequently, the disk 34 is controlled to drive the inner ring to rotate synchronously, preparing for the subsequent grinding of the inner ring.

[0027] During operation, the bearing inner ring to be processed is first placed on the loading rack 311. Then, the first drive unit moves the first drive frame 32 and controls the loading swing arm 321 to rotate to the position on the loading rack 311, inserting and limiting the inner ring. The loading swing arm 321 then rotates and transports the inner ring to the processing area. After the inner ring is magnetically attracted by the disk 34, the first drive unit controls the loading swing arm 321 to reset, and the unloading swing arm 322 rotates to the processing area to limit the inner ring. The second drive unit drives the disk 34 to rotate on its fixed axis, causing the inner ring to rotate synchronously and undergo grinding. After processing, the unloading swing arm 322 moves the processed inner ring out of the processing area and transports it to the unloading rack 312, completing the automatic loading and unloading of the inner ring.

[0028] like Figures 4-5 As shown, the limiting support assembly 4 includes a limiting block 41 and a floating block 42 slidably disposed on the placement plate 31. The limiting block 41 and the floating block 42 can reciprocate along the placement plate 31, moving closer to or away from the inner ring on the disk 34. A floating head 421 is rotatably disposed on the side of the floating block 42 near the inner ring. A first elastic element 422 is connected to the pivot of the floating head 421. The other end of the first elastic element 422 is connected to the floating block 42. The first elastic element 422 ensures that one end of the floating head 421 always faces the inner ring. The side of the floating head 421 facing the inner ring is V-shaped so that it can fit against the inner ring. In this embodiment, the first elastic element 422 is a torsion spring. The side of the limiting block 41 and the floating head 421 facing the inner ring are both made of wear-resistant material and can contact the inner ring to prevent wear during grinding.

[0029] like Figures 6-13As shown, the limiting support assembly 4 also includes a limiting frame 43 disposed at one end of the unloading swing arm 322. One side of the limiting frame 43 can be inserted into the inner ring and contact the disk 34. A drive rod 44 is rotatably disposed on the limiting frame 43, and a slide rod 441 is slidably disposed on the drive rod 44. The slide rod 441 can slide back and forth along the drive rod 44. One end of the drive rod 44 is connected to a second elastic element 442, and the other end of the second elastic element 442 is connected to the slide rod 441. A snap-fit ​​connector 443 is disposed on the side of the slide rod 441 away from the second elastic element 442. The disk 34 is provided with a snap-fit ​​groove 341 that cooperates with the snap-fit ​​connector 443. When one side of the limiting frame 43 contacts the disk 34, one end of the snap-fit ​​connector 443 first contacts the side of the disk 34, and the second elastic element 442 is in a compressed state. At this time, rotating the disk 34, under the action of the second elastic element 442, allows the snap-fit ​​connector 443 to be inserted into the snap-fit ​​groove 341. In this embodiment, the second elastic element 442 is set as a spring.

[0030] A guide ring 45 is rotatably mounted on the slide rod 441, and the guide ring 45 can slide back and forth along the limiting frame 43. A sleeve 451 is rotatably mounted on the limiting frame 43, and the sleeve 451 is located outside the guide ring 45. A sliding post 452 is mounted on the guide ring 45, and a spiral groove 453 that cooperates with the sliding post 452 is provided inside the sleeve 451. The spiral groove 453 is spirally arranged along the axial direction of the sleeve 451. When one end of the snap-fit ​​connector 443 first contacts the side of the disk 34, the disk 34 is rotated so that the snap-fit ​​connector 443 corresponds to the snap-fit ​​groove 341. When the snap-fit ​​connector 443 is inserted into the snap-fit ​​groove 341, the slide rod 441 can drive the guide ring 45 to move synchronously and approach the disk 34. Under the cooperation of the sliding post 452 and the spiral groove 453, the sleeve 451 begins to rotate along the fixed axis of the limiting frame 43.

[0031] A gear set is mounted on the drive rod 44, including a main gear 444 mounted on the drive rod 44. A connecting gear 445, which meshes with the main gear 444, is rotatably mounted on the limiting frame 43. Multiple sets of connecting gears 445 are evenly arranged around the main gear 444. When the drive rod 44 rotates, the main gear 444 drives multiple sets of connecting gears 445 to rotate synchronously. A support frame 46 is rotatably mounted on the limiting frame 43, and a support roller 461 is rotatably mounted on the support frame 46. During grinding, the support roller 461 is located inside the inner ring. A secondary gear 462, which meshes with the connecting gear 445, is mounted on the support roller 461. The support frame 46 swings around the rotation axis of the connecting gear 445, meaning that when the support frame 46 rotates along the connecting gear 445, the connecting gear 445 and the secondary gear 462 are always meshed. A third elastic element 463 is provided at the pivot position of the support frame 46. The other end of the third elastic element 463 is connected to the limiting frame 43. In the initial state, under the action of the third elastic element 463, the support frame 46 can be driven to rotate the support roller 461 away from the limiting frame 43. In this embodiment, the third elastic element 463 is set as a torsion spring. The sleeve 451 is provided with multiple sets of push plates 464, and the support frame 46 is provided with a baffle 465 that cooperates with the push plates 464. When one end of the snap-fit ​​connector 443 contacts the side of the disk 34 first, the sleeve 451 twists, and the push plates 464 limit the baffle 465, pushing the baffle 465 to rotate synchronously. At this time, the third elastic element 463 is twisted by force, and the support roller 461 rotates towards the limiting frame 43. When the snap-fit ​​connector 443 is inserted into the snap-fit ​​groove 341, the sleeve 451 rotates while driving the push plate 464 to rotate in the opposite direction. The push plate 464 releases the limit on the baffle 465. Under the action of the third elastic element 463, the support frame 46 drives the support roller 461 to rotate away from the limit frame 43 and gradually approach the inner wall of the inner ring, and supports and positions the inner wall.

[0032] During operation, the unloading swing arm 322 moves the limiting frame 43 to the processing area, causing one side of the limiting frame 43 to insert into the inner ring and contact the disk 34. The locking connector 443 first contacts the side of the disk 34 and compresses the second elastic element 442. Then, the disk 34 rotates, aligning the locking connector 443 with the locking groove 341. Under the action of the second elastic element 442, the locking connector 443 inserts into the locking groove 341, allowing the drive rod 44 and the disk 34 to rotate synchronously. At this time, the slide rod 441 drives the guide ring 45 to approach the disk 34, and under the action of the slide column 452 and the spiral groove 453, it drives the sleeve 451 to rotate. When the sleeve 451 initially rotates, the pusher 464 pushes the baffle 465, causing the support frame 46 to rotate the support roller 461 towards the limiting frame 43. At this time, the snap-fit ​​connector 443 contacts the side of the disk 34. After the snap-fit ​​connector 443 is fully inserted into the snap-fit ​​groove 341, the pusher 464 releases the limiting of the baffle 465. Under the action of the third elastic element 463, the support frame 46 drives the support roller 461 to rotate away from the limiting frame 43, so that multiple support rollers 461 gradually and synchronously contact the inner wall of the inner ring and provide support and positioning, positioning the inner ring at the rotation center of the disk 34. Furthermore, the axis of the auxiliary gear 462 is located on one side of the line connecting the center of the main gear 444 and the connecting gear 445, ensuring that the auxiliary gear 462 always maintains stable meshing with the connecting gear 445 during the rotation of the support frame 46, preventing the axis of the auxiliary gear 462 from exactly coinciding with the center axis of the main gear 444 and the connecting gear 445, thus preventing the support frame 46 from over-center reversal or jamming.

[0033] like Figure 3 , Figures 6-7 and Figures 9-13 As shown, the detection and adjustment assembly 5 includes a detection ring 51 slidably mounted on the limiting frame 43. The bottom of the detection ring 51 has a wedge 511 that cooperates with the support frame 46. The end of the support frame 46 away from the baffle 465 is always in contact with the bottom inclined surface of the wedge 511. The limiting frame 43 is equipped with a position detection device 52 that cooperates with the detection ring 51. One side of the detection ring 51 passes through the limiting frame 43 and extends into the position detection device 52. When the support frame 46 reciprocates, the detection ring 51 begins to slide reciprocally under the influence of the bottom inclined surface of the wedge 511, and the movement of the detection ring 51 can be detected by the position detection device 52.

[0034] An adjustment disk 53 is slidably disposed inside the disk 34, penetrating the disk 34 and extending to its exterior. A push rod 531 is disposed at one end of the adjustment disk 53, penetrating the disk 34 and communicating with a locking slot 341. The push rod 531 can reciprocate within the locking slot 341. A guide plate 54 is slidably disposed on the outside of the disk 34, and the guide plate 54 rotatably engages with the adjustment disk 53. One end of the guide plate 54 is connected to an electromagnetic frame 33. The reciprocating sliding of the guide plate 54 and the adjustment disk 53 can be controlled by a second drive unit.

[0035] During operation, after the inner ring is positioned by multiple sets of support rollers 461, the control guide plate 54 drives the adjusting plate 53 to approach the limiting frame 43. At this time, the push rod 531 on one side of the adjusting plate 53 first contacts the clamping joint 443 and pushes it to move. Then, the sleeve 451 drives the push plate 464 to rotate, thereby controlling the support frame 46 to rotate, so that a certain gap or slight contact is maintained between the support roller 461 and the inner wall of the inner ring, ensuring that the support roller 461 does not apply support force to the inner ring and avoids interference. If the inner ring only undergoes a small range of displacement under the grinding action of the grinding assembly 6, the position of the support roller 461 remains unchanged, and the grinding assembly 6 performs grinding normally. If the inner ring undergoes a more significant displacement, the support roller 461 is forced to drive the support frame 46 to rotate. The position detection device 52 detects the movement of the detection ring 51. At this time, the push rod 531 continues to push the clamping joint 443, causing the support roller 461 to rotate towards the limiting frame 43, thus preventing the inner ring from jamming. At the same time, the support roller 461 rotates and contacts the inner ring, which helps the inner ring maintain a stable rotation speed, prevents it from stopping, and reduces the grinding speed of the grinding assembly 6.

[0036] If the position detection device 52 detects that the movement of the detection ring 51 has not been restored, the grinding assembly 6 is controlled to stop moving or move in the opposite direction a certain distance to disengage from the inner ring, so as to avoid the inner ring from getting stuck or burning its surface. After the inner ring resumes stable rotation, the grinding assembly 6 continues to grind normally.

[0037] like Figures 2-3 As shown, the grinding assembly 6 includes a grinding frame 61 slidably mounted on the processing table 2. A grinding wheel 62 is rotatably mounted on the grinding frame 61. During operation, the grinding frame 61 can approach the inner ring while the grinding wheel 62 rotates to perform grinding on the inner ring. A feeding rod 35 is mounted on the first drive frame 32. The feeding rod 35 passes through the placement plate 31 and is flush with the side of the placement plate 31. The feeding rod 35 cooperates with the clamping connector 443, and the feeding rod 35 can assist in feeding the inner ring.

[0038] After grinding, push rod 531 pushes snap-fit ​​connector 443 so that the end of snap-fit ​​connector 443 is flush with the side of disk 34. At this time, support roller 461 is in a position close to limit frame 43, and the inner ring is not supported. Then, control the unloading swing arm 322 to rotate to the unloading frame 312 position. At this time, unloading rod 35 contacts snap-fit ​​connector 443. Then, control the first drive frame 32 to move closer to placement plate 31, so that limit frame 43 is gradually pulled out from the inner ring. Through the cooperation of unloading rod 35 and snap-fit ​​connector 443, the second elastic element 442 is kept in a compressed state. The inner ring is unloaded. When feeding continues, the guide plate 54 can control the movement of adjustment plate 53, so that push rod 531 extends out of snap-fit ​​groove 341 and contacts snap-fit ​​connector 443 again, so that limit frame 43 can be properly inserted into the inner ring.

[0039] A method for grinding the raceway of a bearing inner ring includes the following steps: S1. Place the inner ring to be processed on the loading rack 311, and transport the inner ring to the processing area through the loading swing arm 321, and position it by magnetic adsorption by the disk 34. S2, the unloading swing arm 322 drives the limit frame 43 to insert into the inner ring, so that the snap connector 443 snaps into the snap slot 341, and realizes the synchronous rotation of the drive rod 44 and the disk 34. S3. The sleeve 451 rotates to release the restriction on the support frame 46. Under the action of the third elastic element 463, multiple sets of support rollers 461 unfold and contact the inner wall of the inner ring for positioning. S4. Adjusting disc 53 pushes the snap-fit ​​connector 443 to move, so that the support roller 461 maintains slight contact or gap with the inner ring, reducing interference with the normal rotation of the inner ring; S5. Grinding assembly 6 drives grinding wheel 62 to approach the inner ring for grinding. When the inner ring deviates, support roller 461 provides auxiliary support and maintains stable rotation of the inner ring. S6. After the position detection device 52 detects abnormal offset, it controls the grinding assembly 6 to decelerate, stop, or retract the tool. After grinding is completed, the material is unloaded by the unloading swing arm 322.

Claims

1. A grinding apparatus for the inner ring raceway of a bearing, comprising: The machine tool (1) and the machining table (2) disposed inside the machine tool (1) are characterized in that they further include: The loading and unloading assembly (3) is set on the processing table (2), and a disk (34) is rotatably mounted on the loading and unloading assembly (3). A limiting support assembly (4) is set on the processing table (2). The limiting support assembly (4) includes a limiting frame (43), a drive rod (44) is rotatably set on the limiting frame (43), a slide rod (441) is slidably set on the drive rod (44), a snap connector (443) is set on one side of the slide rod (441), and a snap groove (341) that cooperates with the snap connector (443) is set on the disk (34); a support frame (46) is rotatably set on the limiting frame (43), a support roller (461) is rotatably set on the support frame (46), a gear set for driving the support roller (461) to rotate is set on the drive rod (44), and a sleeve (451) for controlling the rotation of the support frame (46) is rotatably set on the limiting frame (43). The detection adjustment component (5) is set on the limit support component (4). The detection adjustment component (5) includes a detection ring (51) that is slidably set on the limit frame (43). The limit frame (43) is provided with a position detection device (52). The disk (34) is slidably set with an adjustment disk (53) that can push the card connector (443) to move. The grinding assembly (6) is set on the machining table (2) and is used to grind the inner ring.

2. The bearing inner ring raceway grinding device according to claim 1, characterized in that: The loading and unloading assembly (3) includes a placement plate (31), which is vertically mounted on the processing table (2). A disk (34) is rotatably mounted on the placement plate (31). A loading rack (311) and a unloading rack (312) are provided on one side of the placement plate (31). A first drive frame (32) is slidably mounted on the side of the placement plate (31) away from the loading rack (311). A loading swing arm (321) and an unloading swing arm (322) are rotatably mounted on one side of the first drive frame (32). The loading swing arm (321) and the unloading swing arm (322) are rotatably mounted on the other side of the first drive frame (32). The material swing arm (322) passes through the placement plate (31) and extends to one side of the loading rack (311). The first drive frame (32) is provided with a first drive unit. The disk (34) passes through the placement plate (31) and extends to one side of the loading rack (311). The processing table (2) is provided with an electromagnetic frame (33). One end of the disk (34) is connected to the electromagnetic frame (33). The electromagnetic frame (33) is provided with a second drive unit that can control the fixed-axis rotation of the disk (34). The disk (34) is magnetic and located in the processing area.

3. The bearing inner ring raceway grinding device according to claim 2, characterized in that: The limiting support assembly (4) includes a limiting block (41) and a floating block (42) slidably disposed on the placement plate (31). The floating block (42) has a floating head (421) rotatably disposed on the side near the inner ring. The first elastic element (422) is connected to the pivot position of the floating head (421). The other end of the first elastic element (422) is connected to the floating block (42). The side of the floating head (421) facing the inner ring is set as V-shaped. Both the limiting block (41) and the side of the floating head (421) facing the inner ring are made of wear-resistant material.

4. The bearing inner ring raceway grinding device according to claim 3, characterized in that: The limiting frame (43) is set at one end of the unloading swing arm (322). The limiting frame (43) can be inserted into the inner ring on one side. One end of the drive rod (44) is connected to the second elastic element (442). The other end of the second elastic element (442) is connected to the slide rod (441). The snap joint (443) is set on the side of the slide rod (441) away from the second elastic element (442). A guide ring (45) is rotatably set on the slide rod (441). The sleeve (451) is set outside the guide ring (45). A sliding column (452) is set on the guide ring (45). A spiral groove (453) that cooperates with the sliding column (452) is set inside the sleeve (451). The spiral groove (453) is spirally set along the axial direction of the sleeve (451).

5. The bearing inner ring raceway grinding device according to claim 4, characterized in that: The gear set includes a main gear (444) mounted on a drive rod (44), a connecting gear (445) rotatably mounted on a limiting frame (43) meshing with the main gear (444), multiple sets of connecting gears (445) evenly arranged around the main gear (444), a secondary gear (462) meshing with the connecting gear (445) mounted on a support roller (461), a support frame (46) swinging around the rotation axis of the connecting gear (445), a third elastic element (463) mounted at the pivot position of the support frame (46), the other end of the third elastic element (463) being connected to the limiting frame (43), multiple sets of push plates (464) mounted on a sleeve (451), and a baffle (465) cooperating with the push plates (464) mounted on the support frame (46).

6. The bearing inner ring raceway grinding device according to claim 5, characterized in that: The bottom of the detection ring (51) is provided with an inclined block (511) that cooperates with the support frame (46). The end of the support frame (46) away from the baffle (465) is always in contact with the bottom inclined surface of the inclined block (511). The position detection device (52) cooperates with the detection ring (51). One side of the detection ring (51) passes through the limiting frame (43) and extends into the interior of the position detection device (52).

7. The bearing inner ring raceway grinding device according to claim 6, characterized in that: An adjustment disk (53) is slidably disposed inside the disk (34). The adjustment disk (53) passes through the disk (34) and extends to its outside. A push rod (531) is provided at one end of the adjustment disk (53). The push rod (531) passes through the disk (34) and is connected to the snap-fit ​​groove (341). A guide plate (54) is slidably disposed on the outside of the disk (34). The guide plate (54) rotates with the adjustment disk (53). One end of the guide plate (54) is connected to the electromagnetic frame (33).

8. The bearing inner ring raceway grinding device according to claim 7, characterized in that: The grinding assembly (6) includes a grinding frame (61) slidably mounted on the processing table (2), a grinding wheel (62) is rotatably mounted on the grinding frame (61), and a feed rod (35) is mounted on the first drive frame (32). The feed rod (35) passes through the placement plate (31) and is flush with the side of the placement plate (31).

9. A method for grinding the raceway of a bearing inner ring, characterized in that: The bearing inner ring raceway grinding apparatus as described in claim 8 includes the following steps: S1. Place the inner ring to be processed on the loading rack (311), and transport the inner ring to the processing area through the loading swing arm (321), and position it by magnetic adsorption by the disk (34); S2. The unloading swing arm (322) drives the limit frame (43) to insert into the inner ring, so that the snap connector (443) engages with the snap slot (341), thereby realizing the synchronous rotation of the drive rod (44) and the disk (34). S3. The sleeve (451) rotates to release the restriction on the support frame (46). Under the action of the third elastic element (463), multiple sets of support rollers (461) unfold and contact the inner wall of the inner ring for positioning. S4. The adjusting disc (53) pushes the snap-fit ​​connector (443) to move, so that the support roller (461) maintains slight contact or gap with the inner ring, reducing interference with the normal rotation of the inner ring; S5. The grinding assembly (6) drives the grinding wheel (62) to approach the inner ring for grinding. When the inner ring deviates, the support roller (461) assists in supporting and maintaining the stable rotation of the inner ring. S6. After the position detection device (52) detects abnormal deviation, it controls the grinding assembly (6) to decelerate, stop or retract the tool. After grinding is completed, the material is unloaded by the unloading swing arm (322).

Images