A bearing outer ring raceway polishing process method with elastic support structure

Abstract

A polishing process for the raceway of a bearing outer ring with a spring support structure is disclosed. This invention belongs to the field of bearing outer ring processing and manufacturing technology. The purpose of this invention is to improve the surface quality of the bearing raceway without affecting the accuracy of the spring support structure, and to ensure smooth transitions between all connecting surfaces. The method involves: installing the bearing ring with the spring support structure to be polished into a polishing fixture; starting the equipment, the polishing fixture rotates clockwise, while the abrasive box drives the abrasive to rotate counterclockwise for polishing; starting the equipment again, the polishing fixture rotates counterclockwise, while the abrasive box drives the abrasive to rotate clockwise for a second polishing process; removing the bearing ring, drying it, and performing rust prevention treatment. After polishing, the edges and corners of the bearing spring support structure have smooth transitions, improving the surface geometry and texture of the raceway, increasing raceway roughness and compressive stress, without affecting the accuracy of the spring support structure. This invention is used for polishing the raceway of the outer ring of a bearing with a spring support structure.

Description

Technical Field

[0001] This invention belongs to the field of bearing outer ring processing and manufacturing technology, specifically relating to a polishing device and process method for the raceway of a bearing outer ring with a spring support structure. Background Technology

[0002] The operating conditions faced by bearings are becoming increasingly complex, leading to ever-increasing demands for integrated and lightweight bearing structures. Bearings with spring supports and flanges integrated into the bearing ring manufacturing process are now commonplace. During the machining of bearing rings, polishing is necessary to ensure smooth transitions between connecting surfaces and improve the surface quality of the bearing raceway. However, the spring support structure is complex, thin, and has low rigidity. While conventional polishing equipment and methods can effectively improve the surface quality of the bearing raceway, they cannot effectively protect the spring support structure. Furthermore, the abrasive material can significantly damage the dimensional accuracy of the spring support during contact with the bearing ring. To improve the surface quality of the bearing ring raceway without compromising the accuracy of the bearing spring support structure, this invention proposes a polishing process for the outer ring raceway of bearings with spring support structures. Summary of the Invention

[0003] This invention proposes a polishing process for the outer ring raceway of a bearing with a spring support structure, aiming to improve the surface quality of the bearing raceway without affecting the accuracy of the bearing spring support structure and to ensure a smooth transition between the connecting surfaces.

[0004] A polishing process for the outer ring raceway of a bearing with a spring support structure is specifically carried out according to the following steps:

[0005] 1. Install the bearing ring with the spring support structure to be polished into the polishing fixture. The polishing fixture consists of a sleeve and a pressure plate. Connect the polishing fixture as a whole to the polishing machine connecting rod. Use alumina particles as abrasive. The polishing fixture is immersed in the abrasive. The central axis of the polishing fixture is at an angle of 45° to 60° to the bottom surface of the abrasive box.

[0006] 2. Start the equipment. The polishing fixture rotates clockwise, and the abrasive box drives the abrasive to rotate counterclockwise for polishing.

[0007] 3. After the second step is completed, wait until the polishing fixture and abrasive are completely still, then start the equipment again. The polishing fixture will rotate counterclockwise, and the abrasive box will drive the abrasive to rotate clockwise for a second polishing process.

[0008] 4. After the processing in step three is completed, remove the bearing ring from the polishing fixture, blow it dry, and perform rust prevention treatment to complete the process.

[0009] The inner ring of the sleeve described in step one has four threaded holes, which correspond to the pre-reserved installation threaded holes on the bearing ring flange.

[0010] Step 1: Install the bearing ring into the sleeve of the polishing fixture. Use bolts to fix the sleeve to the bearing ring, and use bolts to fix the bearing ring spring support to correspond to the sleeve spring support position, so as to fix the bearing ring in the circumferential position. Use bolts to connect the pressure plate to the sleeve to fix the bearing ring in the axial direction.

[0011] Beneficial effects of this invention:

[0012] After polishing, the edges and corners of the bearing spring support structure are smoothly transitioned, improving the surface geometry and texture of the raceway, increasing raceway roughness and compressive stress, without affecting the accuracy of the spring support structure. This achieves an improvement in the surface roughness and optimization of the raceway surface while ensuring the accuracy of the spring support structure.

[0013] The method of this invention is used for polishing the raceway of the outer ring of a bearing with a spring support structure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the bearing ring with the spring support structure to be polished being installed into the polishing fixture in a specific implementation method.

[0015] Figure 2 This is a schematic diagram of a specific implementation method where the polishing fixture is completely immersed in the abrasive.

[0016] Figure 3 This is a schematic diagram of the sleeve structure described in Specific Implementation Method Two;

[0017] Figure 4 This is a schematic diagram of the pressure plate structure described in Specific Implementation Method 2. Detailed Implementation

[0018] Specific Implementation Method 1: This implementation method provides a polishing process for the raceway of the outer ring of a bearing with a spring support structure, which is carried out according to the following steps:

[0019] 1. Install the bearing ring 1 with the elastic support structure to be polished into the polishing fixture 2. The polishing fixture 2 consists of a sleeve and a pressure plate. Connect the polishing fixture 2 as a whole to the polishing machine connecting rod. Use alumina particles as abrasive 3. The polishing fixture 2 is completely immersed in the abrasive 3. The central axis of the polishing fixture 2 is at an angle of 45°~60° to the bottom surface of the abrasive box 4.

[0020] 2. Start the equipment. The polishing fixture 2 rotates clockwise, and the abrasive box 4 drives the abrasive 3 to rotate counterclockwise for polishing.

[0021] 3. After the second step is completed, wait until the polishing fixture 2 and the abrasive 3 are completely still, then start the equipment again. The polishing fixture 2 will rotate counterclockwise, and the abrasive box 4 will drive the abrasive 3 to rotate clockwise for a second polishing process.

[0022] 4. After the processing in step 3 is completed, remove the bearing ring 1 from the polishing fixture 2, blow it dry, and perform rust prevention treatment to complete the process.

[0023] Specific Implementation Method Two: This implementation method differs from Specific Implementation Method One in that the inner ring of the sleeve described in step one has four threaded holes, which correspond to the pre-drilled installation threaded holes on the bearing ring flange. Everything else is the same as in Specific Implementation Method One.

[0024] Specific Implementation Method Three: This implementation method differs from Specific Implementation Method One or Two in that: in step one, the bearing ring 1 is installed into the sleeve of the polishing fixture 2, and the sleeve is fixed to the bearing ring 1 using bolts. The bolts also align the bearing ring spring support with the sleeve spring support, thus fixing the bearing ring 1 in a circumferential position. Bolts are used to connect the pressure plate to the sleeve, thus fixing the bearing ring 1 axially. The rest is the same as in Specific Implementation Method One or Two.

[0025] Specific Implementation Method Four: This implementation method differs from Specific Implementation Methods One to Three in that: M8 bolts are used to fix the sleeve to the bearing ring 1, and M12 bolts are used to connect the pressure plate to the sleeve. Everything else is the same as in Specific Implementation Methods One to Three.

[0026] Specific Implementation Method Five: This implementation method differs from Specific Implementation Methods One to Four in that the diameter of the alumina particles described in step one is 1-5 mm. Everything else is the same as in Specific Implementation Methods One to Four.

[0027] Specific Implementation Method Six: This implementation method differs from Specific Implementation Methods One to Five in that the finishing machine described in step one is a large-scale cyclone milling finishing machine. Everything else is the same as in Specific Implementation Methods One to Five.

[0028] Specific Implementation Method Seven: This implementation method differs from Specific Implementation Methods One to Six in that the distance between the top of the polishing fixture 2 in step one and the surface of the abrasive is not less than 30mm. Everything else is the same as in Specific Implementation Methods One to Six.

[0029] Specific Implementation Method Eight: This implementation method differs from Specific Implementation Methods One to Seven in that: in step two, the polishing process involves abrasive box 4 rotating at 10-30 rpm, polishing fixture 2 rotating at 10-30 rpm, and polishing time of 20-35 minutes. Everything else is the same as in Specific Implementation Methods One to Seven.

[0030] Specific Implementation Method Nine: This implementation method differs from Specific Implementation Methods One to Eight in that: in step three, the secondary polishing process involves the abrasive box 4 rotating at 10-30 rpm and the polishing fixture 2 rotating at 10-30 rpm, followed by a second polishing time of 20-35 minutes. Everything else is the same as in Specific Implementation Methods One to Eight.

[0031] Specific Implementation Method Ten: This implementation method differs from Specific Implementation Methods One to Nine in that step four uses compressed air for drying. Everything else is the same as in Specific Implementation Methods One to Nine.

[0032] The scope of this invention is not limited to the above-described embodiments; a combination of one or more specific embodiments can also achieve the purpose of the invention.

[0033] Example 1:

[0034] This embodiment describes a polishing process for the raceway of a bearing with a spring-supported structure. The process involves polishing a bearing raceway with a 156mm outer diameter that has undergone precision grinding. The specific steps are as follows:

[0035] 1. Install the bearing ring with the spring support structure to be polished into the polishing fixture. Connect the polishing fixture 2 as a whole to the polishing machine connecting rod. Use irregularly shaped alumina particles with a diameter of 1~5mm as abrasive. The polishing fixture 2 is completely immersed in the abrasive 3. The central axis of the polishing fixture 2 is at 50° with the bottom surface of the abrasive box. The top of the polishing fixture 2 is at least 30mm away from the surface of the abrasive.

[0036] 2. Start the equipment. The polishing fixture 2 rotates clockwise, and the abrasive box 4 drives the abrasive 3 to rotate counterclockwise for polishing. The abrasive box 4 rotates at 10 rpm, the polishing fixture 2 rotates at 10 rpm, and the polishing time is 20 minutes.

[0037] 3. After the processing in step two is completed, wait until the polishing fixture 2 and the abrasive 3 are completely still, then start the equipment again. The polishing fixture 2 rotates counterclockwise, and the abrasive box 4 drives the abrasive 3 to rotate clockwise. The rotation speed of the abrasive box 4 is 10 rpm, and the rotation speed of the polishing fixture 2 is 10 rpm. Polish again for 20 minutes to perform a second polishing process.

[0038] 4. After the processing in step 3 is completed, remove the bearing ring 1 from the polishing fixture 2, dry it with compressed air, and perform rust prevention treatment to complete the process.

[0039] The polishing fixture described in step one consists of a sleeve and a pressure plate. The inner ring of the sleeve has four M8 threaded holes, which correspond to the pre-reserved installation threaded holes on the bearing ring flange.

[0040] Step 1: Install the bearing ring into the sleeve of the polishing fixture. Use M8 bolts to fix the sleeve to the bearing ring, and use bolts to fix the bearing ring spring support to correspond to the sleeve spring support position, so as to fix the bearing ring circumferential position. Use M12 bolts to connect the pressure plate to the sleeve to fix the bearing ring axially.

[0041] The finishing machine mentioned in step one is a large-scale cyclone milling finishing machine.

[0042] The detection structure after polishing in this embodiment is shown in Table 1.

[0043] Table 1

[0044]

[0045] Example 2:

[0046] This embodiment describes a polishing process for the raceway of a bearing with a spring-supported structure. The process involves polishing a 230mm outer diameter bearing raceway with a spring-supported structure after precision grinding. The specific steps are as follows:

[0047] 1. Install the bearing ring with the spring support structure to be polished into the polishing fixture. Connect the polishing fixture 2 as a whole to the polishing machine connecting rod. Use spherical alumina particles with a diameter of 1~5mm as abrasive. The polishing fixture 2 is completely immersed in the abrasive 3. The central axis of the polishing fixture 2 is at a 50° angle to the bottom surface of the abrasive box. The top of the polishing fixture 2 is at least 30mm away from the abrasive surface.

[0048] 2. Start the equipment. The polishing fixture 2 rotates clockwise, and the abrasive box 4 drives the abrasive 3 to rotate counterclockwise for polishing. The abrasive box 4 rotates at 20 rpm, the polishing fixture 2 rotates at 15 rpm, and the polishing time is 25 minutes.

[0049] 3. After the processing in step two is completed, wait until the polishing fixture 2 and the abrasive 3 are completely still, then start the equipment again. The polishing fixture 2 rotates counterclockwise, and the abrasive box 4 drives the abrasive 3 to rotate clockwise. The rotation speed of the abrasive box 4 is 20 rpm, and the rotation speed of the polishing fixture 2 is 15 rpm. Polish again for 25 minutes to perform a second polishing process.

[0050] 4. After the processing in step 3 is completed, remove the bearing ring 1 from the polishing fixture 2, dry it with compressed air, and perform rust prevention treatment to complete the process.

[0051] The polishing fixture described in step one consists of a sleeve and a pressure plate. The inner ring of the sleeve has four M8 threaded holes, which correspond to the pre-reserved installation threaded holes on the bearing ring flange.

[0052] Step 1: Install the bearing ring into the sleeve of the polishing fixture. Use M8 bolts to fix the sleeve to the bearing ring, and use bolts to fix the bearing ring spring support to correspond to the sleeve spring support position, so as to fix the bearing ring circumferential position. Use M12 bolts to connect the pressure plate to the sleeve to fix the bearing ring axially.

[0053] The finishing machine mentioned in step one is a large-scale cyclone milling finishing machine.

[0054] The detection structure after polishing in this embodiment is shown in Table 2.

[0055] Table 2

[0056]

[0057] Example 3:

[0058] This embodiment describes a polishing process for the raceway of a bearing with a spring-supported structure. The process involves polishing a bearing raceway with a 110mm outer diameter that has undergone precision grinding. The specific steps are as follows:

[0059] 1. Install the bearing ring with the spring support structure to be polished into the polishing fixture. Connect the polishing fixture 2 as a whole to the polishing machine connecting rod. Use irregularly shaped alumina particles with a diameter of 1~5mm as abrasive. The polishing fixture 2 is completely immersed in the abrasive 3. The central axis of the polishing fixture 2 is at 45° to the bottom surface of the abrasive box. The top of the polishing fixture 2 is at least 30mm away from the surface of the abrasive.

[0060] 2. Start the equipment. The polishing fixture 2 rotates clockwise, and the abrasive box 4 drives the abrasive 3 to rotate counterclockwise for polishing. The abrasive box 4 rotates at 30 rpm, the polishing fixture 2 rotates at 30 rpm, and the polishing time is 35 minutes.

[0061] 3. After the processing in step two is completed, remove the bearing ring 1 from the polishing fixture 2, dry it with compressed air, and perform rust prevention treatment to complete the process.

[0062] The polishing fixture described in step one consists of a sleeve and a pressure plate. The inner ring of the sleeve has four M8 threaded holes, which correspond to the pre-reserved installation threaded holes on the bearing ring flange.

[0063] Step 1: Install the bearing ring into the sleeve of the polishing fixture. Use M8 bolts to fix the sleeve to the bearing ring, and use bolts to fix the bearing ring spring support to correspond to the sleeve spring support position, so as to fix the bearing ring circumferential position. Use M12 bolts to connect the pressure plate to the sleeve to fix the bearing ring axially.

[0064] The finishing machine mentioned in step one is a large-scale cyclone milling finishing machine.

[0065] The detection structure after polishing in this embodiment is shown in Table 3.

[0066] Table 3

[0067]

[0068] The test results before and after polishing in the three embodiments show that after polishing the bearing raceway rings with the elastic support structure using the present invention, the roughness values ​​of Ra, Rp, Rv, Rz, Rt, Rq and other roughness indicators of the bearing raceway surface all decreased, the raceway compressive stress increased, and the surface quality of the raceway was greatly improved. Furthermore, the present invention has little impact on the dimensional accuracy of the bearing elastic support structure. After polishing, the roundness of the outer diameter of the bearing elastic support and the change in outer diameter are all within the product process requirements and meet the product index requirements.

Claims

1. A polishing process for the raceway of the outer ring of a bearing with a spring support structure, characterized in that... This method is specifically carried out in the following steps:

1. Install the bearing ring (1) with elastic support structure to be polished into the polishing fixture (2). The polishing fixture (2) consists of a sleeve and a pressure plate. Connect the polishing fixture (2) as a whole to the polishing machine connecting rod. Use alumina particles as abrasive (3). The polishing fixture (2) is completely immersed in the abrasive (3). The central axis of the polishing fixture (2) is at an angle of 45°~60° to the bottom surface of the abrasive box (4).

2. Start the equipment, the polishing fixture (2) rotates clockwise, and the abrasive box (4) drives the abrasive (3) to rotate counterclockwise for polishing.

3. After the second step is completed, wait until the polishing fixture (2) and abrasive (3) are completely still, then start the equipment again. The polishing fixture (2) rotates counterclockwise, and the abrasive box (4) drives the abrasive (3) to rotate clockwise for a second polishing process.

4. After the processing in step 3 is completed, remove the bearing ring (1) from the polishing fixture (2), blow it dry, and perform rust prevention treatment to complete the process.

2. The polishing process for the raceway of the outer ring of a bearing with a spring support structure according to claim 1, characterized in that... The inner ring of the sleeve described in step one has four threaded holes, which correspond to the pre-reserved installation threaded holes on the bearing ring flange.

3. The polishing process for the raceway of the outer ring of a bearing with a spring support structure according to claim 1, characterized in that... Step 1: Install the bearing ring (1) into the sleeve of the polishing fixture (2), use bolts to fix the sleeve to the bearing ring (1), and fix the bearing ring spring support to correspond to the sleeve spring support position through bolt fixation, so as to fix the bearing ring (1) in the circumferential position; use bolts to connect the pressure plate to the sleeve to fix the bearing ring (1) in the axial direction.

4. The polishing process for the raceway of the outer ring of a bearing with a spring support structure according to claim 3, characterized in that... The sleeve is fixed to the bearing ring (1) using M8 bolts, and the pressure plate is connected to the sleeve using M12 bolts.

5. The polishing process for the raceway of the outer ring of a bearing with a spring support structure according to claim 1, characterized in that... The diameter of the alumina particles mentioned in step one is 1~5mm.

6. The polishing process for the raceway of the outer ring of a bearing with a spring support structure according to claim 1, characterized in that... The finishing machine mentioned in step one is a large-scale cyclone milling finishing machine.

7. The polishing process for the raceway of the outer ring of a bearing with a spring support structure according to claim 1, characterized in that... The top of the polishing fixture (2) described in step one is at least 30mm away from the surface of the abrasive.

8. The polishing process for the raceway of the outer ring of a bearing with a spring support structure according to claim 1, characterized in that... In the polishing process described in step two, the abrasive box (4) rotates at 10~30 rpm, the polishing fixture (2) rotates at 10~30 rpm, and the polishing time is 20~35 min.

9. The polishing process for the raceway of the outer ring of a bearing with a spring support structure according to claim 1, characterized in that... In the second polishing process described in step three, the abrasive box (4) rotates at 10~30 rpm, the polishing fixture (2) rotates at 10~30 rpm, and polishes again for 20~35 minutes.

10. The polishing process for the raceway of the outer ring of a bearing with a spring support structure according to claim 1, characterized in that... Step four involves drying with compressed air.

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