Device and method for improving surface quality and performance of bearing ring channel

Abstract

The invention relates to the technical field of bearing machining, in particular to a device and method for improving the surface quality and performance of a bearing ring channel, comprising a chuck, the front surface of the chuck is provided with a die holder, the front surface of the die holder is movably connected with an expansion sleeve, and the front and rear sides of the outer surface of the expansion sleeve are respectively provided with groups of deformation ports; a first deformation part is formed between the adjacent deformation openings in the rear side, a second deformation part is formed between the adjacent deformation openings in the front side, a fixing cylinder is fixedly connected to the position, located on the inner side of the expansion sleeve, of the front surface of the mold base, and grouped inserting columns are arranged on the front side and the rear side of the outer surface of the fixing cylinder correspondingly; according to the bearing inner ring groove surface grinding device, the surface microtopography of a bearing inner ring groove is remarkably improved, and microcracks generated by bearing groove surface grinding are effectively eliminated; according to the device and method for improving the surface quality and performance of the bearing ring channel, the technological process is improved, and the cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing processing, and in particular to a device and method for improving the surface quality and performance of a bearing ring groove. Background Art

[0002] Frequent contact, relative motion and friction occur between the bearing ring groove and the rolling element, causing surface fatigue failure, wear failure and strength failure of the bearing ring groove, which seriously affects the service life of the bearing. The surface quality of the bearing groove largely determines the service performance of the bearing and is the most important parameter for evaluating bearing performance. At present, the processing of the bearing ring groove is mainly carried out by grinding the raceway with a grinding wheel, then grinding, and finally polishing. The current processing technology has the following problems: (1) The process flow is long, the efficiency is low, and the cost is high; (2) The stress distribution on the processed surface is uneven, and tensile stress is easily present, which affects the fatigue resistance of the bearing. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings existing in the background technology and to propose a device and method for improving the surface quality and performance of the groove of a bearing ring.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a device for improving the surface quality and performance of the groove of a bearing ring, comprising a chuck, a die base is arranged on the front surface of the chuck, an expansion sleeve is movably connected to the front surface of the die base, and groups of deformation openings are respectively opened on the front and rear edges of the outer surface of the expansion sleeve, and each group of deformation openings is arranged in a circular array, a first deformation portion is formed between adjacent deformation openings at the rear, and a second deformation portion is formed between adjacent deformation openings at the front, a fixed cylinder is fixedly connected to the front surface of the die base and located on the inner side of the expansion sleeve, and groups of plug posts are respectively arranged on the front and rear edges of the outer surface of the fixed cylinder, and each group of plug posts is arranged in a circular array, and a pushing ring is fixedly arranged on the outer surface of the threaded column.

[0005] Preferably, connecting blocks are fixedly connected to the upper and lower parts of the rear side of the expansion sleeve, and side blocks are fixedly connected to the rear ends of the two side surfaces of the connecting block. Slide openings are respectively opened on the upper and lower parts of the front surface of the mold base, and the connecting block is slidably inserted into the port of the slide opening, and the side blocks are movably inserted into the inner side of the slide opening.

[0006] Preferably, the elastic mechanism includes a guide cylinder fixedly embedded in the outer surface of the fixed cylinder, the plug post is slidably inserted into the inner side of the guide cylinder, the end of the plug post away from the expansion sleeve is fixedly connected to the movable disk, the end of the guide cylinder close to the movable disk is fixedly connected to the fixed disk, a compression spring is fixedly connected between the movable disk and the fixed disk, and the compression spring is sleeved on the surface of the plug post.

[0007] Preferably, the front and rear surfaces of the pushing ring are respectively provided with transition curved surfaces.

[0008] Preferably, a contact sleeve is fixedly connected to the front end of the threaded column.

[0009] Preferably, the rear surface of the chuck is connected to the output end of the lathe, the upper surface of the lathe is slidably connected to a slide, the front surface of the slide is fixedly mounted with a second motor, the output shaft of the second motor is fixedly connected to a pushing column, the pushing column rotates and passes through the outer surface of the slide, the rear end of the pushing column is fixedly connected to a pushing head, and the pushing head is located in front of the contact sleeve.

[0010] Preferably, an ultrasonic rolling machine is fixedly installed on the rear surface of the lathe, and a rolling head is provided at the lower end of the ultrasonic rolling machine, and the rolling head is located above the expansion sleeve.

[0011] Preferably, a first motor is fixedly connected to the rear end of one side surface of the lathe, a screw rod is fixedly connected to the output shaft of the first motor, the screw rod is rotationally connected to the side surface of the lathe, and the screw rod thread passes through the inner side of the slide.

[0012] A method for improving the surface quality and performance of the bearing ring groove is also proposed, which is carried out using the above-mentioned device and includes the following steps:

[0013] S1. Heat treatment is performed on the inner ring groove of the bearing before ultrasonic surface rolling treatment;

[0014] S2. Rough grinding and fine grinding of the groove surface of the inner ring of the bearing;

[0015] S3, the inner ring of the bearing is placed on the outer surface of the expansion sleeve for positioning, and then the inner ring of the bearing is ultrasonically rolled.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention significantly improves the surface micromorphology of the inner ring groove of the bearing, and effectively eliminates the micro cracks caused by grinding the surface of the bearing groove; the device and method for improving the surface quality and performance of the bearing ring groove of the present invention improve the process flow and save costs;

[0018] 2. The present invention improves the stress distribution on the inner ring surface of the bearing during processing, improves the anti-fatigue performance of the bearing, and has simple operation and high stability;

[0019] 3. The present invention can prevent the problem of excessively concentrated force on a local position of the inner wall of the inner ring of the bearing and deformation and damage caused by ultrasonic rolling for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a partial structural schematic diagram of a device for improving the surface quality and performance of a bearing ring groove of the present invention;

[0021] Figure 2 A cross-sectional view of a die seat of a device for improving the surface quality and performance of a bearing ring groove of the present invention;

[0022] Figure 3 The device for improving the surface quality and performance of the bearing ring groove of the present invention Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 It is a schematic diagram of the expansion sleeve and the fixing cylinder of the device for improving the surface quality and performance of the bearing ring groove of the present invention;

[0024] Figure 5 A schematic diagram of the elastic mechanism of the device for improving the surface quality and performance of the bearing ring groove of the present invention;

[0025] Figure 6 A schematic diagram of the expansion sleeve of the device for improving the surface quality and performance of the bearing ring groove of the present invention;

[0026] Figure 7 It is a cross-sectional view of the die base of the device for improving the surface quality and performance of the bearing ring groove of the present invention.

[0027] Figure 8 It is a schematic diagram of a device for improving the surface quality and performance of a bearing ring groove according to the present invention.

[0028] In the figure: 1. chuck; 2. die base; 3. expansion sleeve; 4. deformation mouth; 5. connecting block; 6. side block; 7. sliding mouth; 8. fixed cylinder; 9. guide cylinder; 10. plug-in column; 11. fixed disk; 12. compression spring; 13. movable disk; 15. first deformation part; 16. second deformation part; 17. threaded column; 18. threaded hole; 19. pushing ring; 20. transition surface; 21. contact sleeve; 22. pushing column; 23. pushing head; 24. lathe; 25. slide; 26. screw; 27. first motor; 28. second motor; 29. ​​ultrasonic rolling machine; 30. rolling head; 31. bearing inner ring. DETAILED DESCRIPTION

[0029] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0030] like Figure 1-Figure 8 The device for improving the surface quality and performance of the groove of a bearing ring shown in the figure comprises a chuck 1, which is a three-jaw chuck commonly used in the prior art. A die base 2 is arranged on the front surface of the chuck 1, and an expansion sleeve 3 is movably connected to the front surface of the die base 2. Groups of deformation openings 4 are respectively opened on the front and rear edges of the outer surface of the expansion sleeve 3. Each group of deformation openings 4 is arranged in a ring array. A first deformation portion 15 is formed between adjacent deformation openings 4 at the rear, and a second deformation portion 16 is formed between adjacent deformation openings 4 at the front. The front surface of the die base 2 is fixedly connected to the inner side of the expansion sleeve 3. It is connected to a fixed cylinder 8, and groups of plug posts 10 are respectively arranged at the front and rear edges of the outer surface of the fixed cylinder 8. Each group of plug posts 10 is arranged as a number of plug posts distributed in a circular array. The plug posts 10 and the fixed cylinder 8 are slidingly connected through an elastic mechanism. One end of the front plug post 10 contacts the inner wall of the second deformation part 16, and one end of the rear plug post 10 contacts the inner wall of the first deformation part 15. A threaded hole 18 is opened through the middle of the front surface of the mold base 2, and a threaded column 17 is threadedly inserted into the front end of the threaded hole 18, and a pushing ring 19 is fixedly arranged on the outer surface of the threaded column 17.

[0031] The upper and lower parts of the rear side of the expansion sleeve 3 are respectively fixedly connected with the connection blocks 5, and the rear ends of the two side surfaces of the connection blocks 5 are respectively fixedly connected with the side blocks 6. The upper and lower parts of the front surface of the mold base 2 are respectively provided with sliding openings 7. The connection blocks 5 are slidably inserted into the ports of the sliding openings 7, and the side blocks 6 are movably inserted into the inner side of the sliding openings 7. It should be noted that: the side wall of the sliding opening 7 is in contact with the side surface of the side block 6, but there is a gap between the inner rear wall of the sliding opening 7 and the side block 6 to ensure that the deformation of the first deformation part 15 is not interfered.

[0032] The elastic mechanism includes a guide cylinder 9 fixedly embedded on the outer surface of the fixed cylinder 8, a plug post 10 is slidably inserted into the inner side of the guide cylinder 9, one end of the plug post 10 away from the expansion sleeve 3 is fixedly connected to a moving disk 13, one end of the guide cylinder 9 close to the moving disk 13 is fixedly connected to a fixed disk 11, a compression spring 12 is fixedly connected between the moving disk 13 and the fixed disk 11, and the compression spring 12 is sleeved on the surface of the plug post 10. The compression spring 12 provides elastic force to ensure that when the moving disk 13 is not pushed, one end of the plug post 10 will not press against the inner wall of the expansion sleeve 3.

[0033] The front and rear surfaces of the pushing ring 19 are respectively provided with transition curved surfaces 20. Play a guiding role, ensure that the moving disk 13 can be pushed when the pushing ring 19 moves backward.

[0034] A contact sleeve 21 is fixedly connected to the front end of the threaded column 17 , and the contact sleeve 21 facilitates the rotation of the threaded column 17 .

[0035] The following discloses the adaptation method of the device in use: the rear surface of the chuck 1 is connected to the output end of the lathe 24, the upper surface of the lathe 24 is slidably connected to the slide 25, the front surface of the slide 25 is fixedly installed with a second motor 28, the output shaft of the second motor 28 is fixedly connected to the pushing column 22, the pushing column 22 rotates and penetrates the outer surface of the slide 25, the rear end of the pushing column 22 is fixedly connected to the pushing head 23, and the pushing head 23 is located in front of the contact sleeve 21. The second motor 28 drives the pushing column 22 to rotate.

[0036] An ultrasonic rolling machine 29 is fixedly installed on the rear surface of the lathe 24, and a rolling head 30 is arranged at the lower end of the ultrasonic rolling machine 29, and the rolling head 30 is located above the expansion sleeve 3. This part is the prior art, which is relatively common in the ultrasonic rolling treatment of metal surfaces, and will not be described in detail.

[0037] A first motor 27 is fixedly connected to the rear end of one side surface of the lathe 24, and a screw rod 26 is fixedly connected to the output shaft of the first motor 27. The screw rod 26 is rotatably connected to the side of the lathe 24, and the screw rod 26 is threaded through the inner side of the slide 25. The operation of the first motor 27 causes the screw rod 26 to rotate, thereby controlling the movement of the slide 25.

[0038] The method for improving the surface quality and performance of the bearing ring groove is carried out using the above-mentioned device and comprises the following steps:

[0039] S1, heat treatment is performed on the groove of the inner ring 31 of the bearing before ultrasonic surface rolling treatment;

[0040] S2, rough grinding and fine grinding of the groove surface of the bearing inner ring 31;

[0041] S3, the bearing inner ring 31 is sleeved on the outer surface of the expansion sleeve 3 for positioning, and then the bearing inner ring 31 is subjected to ultrasonic rolling operation.

[0042] By ultrasonically rolling the bearing inner ring 31, the surface micromorphology of the groove of the bearing inner ring 31 is significantly improved, and the micro cracks caused by grinding the bearing groove surface are effectively eliminated; a bearing ring groove surface quality and performance improvement device and method of the present invention improves the process flow and saves costs; improves the stress distribution on the bearing inner ring surface during processing, improves the fatigue resistance of the bearing, and is simple to operate and has high stability.

[0043] The user puts the bearing inner ring 31 on the surface of the expansion sleeve 3 to fix it, and moves it backward by rotating the threaded column 17. The pushing ring 19 pushes the movable disk 13 relatively located in the front to a limited extent, so that the plug column 10 pushes the second deformation part 16. The second deformation part 16 is tightened and firmly contacts the inner wall of the bearing inner ring 31. Under the action of the subsequent rolling head 30, the surface of the bearing inner ring 31 is rolled. After a certain number of rolling circles are completed, the threaded column 17 is rotated in the opposite direction relative to the chuck 1, so that the threaded column 17 moves further backward. At this time, the pushing ring 19 will contact the movable disk 13 relatively located in the rear, so that the plug column 10 at this position pushes the first deformation part 15, that is, the position of the tightening force on the bearing inner ring 31 is changed, so as to prevent the problem of excessive concentration of force at a local position of the inner wall of the bearing inner ring 31 and deformation damage during a long period of ultrasonic rolling.

[0044] When the user controls the rotation of the threaded column 17, the first motor 27 is driven to rotate the screw rod 26, thereby driving the slide 25 to move backward, so that the pushing column 22 moves backward. At the same time, the second motor 28 is driven to rotate the pushing column 22. When the rotating pushing head 23 touches the contact sleeve 21, the threaded column 17 rotates and has a force to move backward. Therefore, the threaded column 17 will move backward relatively along the inner side of the threaded hole 18. In this way, the threaded column 17 can be automatically controlled to move backward, which is convenient to operate.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for improving the surface quality and performance of a bearing ring raceway, comprising a chuck (1), characterized in that: The front surface of the chuck (1) is provided with a die base (2), the front surface of the die base (2) is movably connected with an expansion sleeve (3), the front and rear edges of the outer surface of the expansion sleeve (3) are respectively provided with groups of deformation openings (4), each group of deformation openings (4) is arranged as a plurality of deformation openings distributed in a ring array, a first deformation portion (15) is formed between adjacent deformation openings (4) at the rear, a second deformation portion (16) is formed between adjacent deformation openings (4) at the front, the front surface of the die base (2) and located at the inner side of the expansion sleeve (3) is fixedly connected with a fixed cylinder (8), the front and rear edges of the outer surface of the fixed cylinder (8) are respectively Groups of plug posts (10) are provided, and each group of plug posts (10) is arranged as a plurality of plug posts distributed in a circular array. The plug posts (10) are slidably connected to the fixed cylinder (8) via an elastic mechanism. One end of the front plug post (10) contacts the inner wall of the second deformation portion (16), and one end of the rear plug post (10) contacts the inner wall of the first deformation portion (15). A threaded hole (18) is provided through the middle of the front surface of the mold base (2), and a threaded post (17) is threadedly inserted into the front end of the threaded hole (18). A pushing ring (19) is fixedly provided on the outer surface of the threaded post (17).

2. The device for improving the surface quality and performance of the bearing ring raceway according to claim 1, characterized in that: The rear upper and lower parts of the expansion sleeve (3) are respectively fixedly connected with connection blocks (5), and the rear ends of the two side surfaces of the connection block (5) are respectively fixedly connected with side blocks (6). The front upper and lower parts of the mold base (2) are respectively provided with sliding openings (7), the connection block (5) is slidably inserted into the port of the sliding opening (7), and the side blocks (6) are movably inserted into the inner side of the sliding opening (7).

3. The device for improving the surface quality and performance of the bearing ring raceway according to claim 1, characterized in that: The elastic mechanism comprises a guide tube (9) fixedly embedded in the outer surface of the fixed tube (8), the plug post (10) is slidably inserted into the inner side of the guide tube (9), the end of the plug post (10) away from the expansion sleeve (3) is fixedly connected to a movable disk (13), the end of the guide tube (9) close to the movable disk (13) is fixedly connected to a fixed disk (11), a compression spring (12) is fixedly connected between the movable disk (13) and the fixed disk (11), and the compression spring (12) is sleeved on the surface of the plug post (10).

4. The device for improving the surface quality and performance of the bearing ring raceway according to claim 1, characterized in that: The front and rear surfaces of the pushing ring (19) are respectively provided with transition curved surfaces (20).

5. The device for improving the surface quality and performance of the bearing ring raceway according to claim 1, characterized in that: A contact sleeve (21) is fixedly connected to the front end of the threaded column (17).

6. The device for improving the surface quality and performance of the bearing ring raceway according to claim 5, characterized in that: The rear surface of the chuck (1) is connected to the output end of the lathe (24); the upper surface of the lathe (24) is slidably connected to a slide table (25); a second motor (28) is fixedly mounted on the front surface of the slide table (25); an output shaft of the second motor (28) is fixedly connected to a pushing column (22); the pushing column (22) rotates and penetrates the outer surface of the slide table (25); a rear end of the pushing column (22) is fixedly connected to a pushing head (23); the pushing head (23) is located in front of the contact sleeve (21).

7. The device for improving the surface quality and performance of the bearing ring raceway according to claim 6, characterized in that: An ultrasonic rolling machine (29) is fixedly mounted on the rear surface of the lathe (24), a rolling head (30) is provided at the lower end of the ultrasonic rolling machine (29), and the rolling head (30) is located above the expansion sleeve (3).

8. The device for improving the surface quality and performance of the bearing ring raceway according to claim 6, characterized in that: A first motor (27) is fixedly connected to the rear end of one side surface of the lathe (24); a screw rod (26) is fixedly connected to the output shaft of the first motor (27); the screw rod (26) is rotatably connected to the side surface of the lathe (24); and the screw rod (26) is threadedly passed through the inner side of the slide table (25).

9. A method for improving the surface quality and performance of a bearing ring raceway, using a device as described in any one of claims 7 to 8, characterized in that: The following steps are involved: S1. heat treating the groove of the bearing inner ring (31) before ultrasonic surface rolling treatment; S2, rough grinding and fine grinding of the groove surface of the bearing inner ring (31); S3, the bearing inner ring (31) is sleeved onto the outer surface of the expansion sleeve (3) for positioning, and then the bearing inner ring (31) is subjected to ultrasonic rolling.

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