Non-magnetic steel combined bearing inner ring machining process

Abstract

This application relates to a machining process for the inner ring of a non-magnetic steel composite bearing, comprising the following steps: turning a blank into the shape of a non-magnetic steel composite bearing inner ring, and machining base surface auxiliary steps and non-base surface auxiliary steps at both ends of the inner ring, followed by heat treatment; performing rough grinding on the two end faces, outer diameter, and inner diameter of the heat-treated inner ring; performing rough grinding on the raceway, raceway, base surface sidewall, and non-base surface sidewall of the inner ring; performing fine grinding on the two end faces, outer diameter, and inner diameter of the inner ring; performing fine grinding on the raceway, raceway, base surface sidewall, and non-base surface sidewall of the inner ring; after fine grinding, grinding away the base surface auxiliary steps and non-base surface auxiliary steps; and performing ultra-precision machining on the raceway and raceway of the inner ring. This process can improve the machining efficiency of the inner ring and reduce the production cycle.

Description

Technical Field

[0001] This invention relates to the field of bearing processing technology, and in particular to a processing technology for the inner ring of a non-magnetic steel composite bearing. Background Technology

[0002] This non-magnetic steel combined bearing adopts an integrated design, integrating ball bearings and roller bearings that traditionally need to be installed separately into one unit. Its compact axial dimensions greatly simplify the mechanical design of equipment with limited axial space, solving the space and load-bearing problems under complex working conditions. At the same time, it combines the advantages of non-magnetic steel, such as non-magnetic properties, corrosion resistance, and high strength, and can be used in extreme environments such as strong magnetic fields and corrosive environments.

[0003] The inner ring structure of the non-magnetic steel combined bearing is shown below. Figure 1 As shown, the machining, end face grinding, outer diameter grinding, and ultra-precision machining of the inner ring are the same as those for ordinary bearing inner rings, requiring no magnetic force. These processes can be completed using CNC lathes, double-end face grinding equipment, centerless grinding of the outer diameter, and roller-type ultra-precision equipment, respectively. However, the grinding of the inner diameter, raceway 23, flange, and groove 21 of the non-magnetic steel composite bearing inner ring requires magnetic force. To ensure that the inner diameter, raceway 23, flange, and groove 21 of the non-magnetic steel composite bearing inner ring retain magnetism during grinding, a magnetic conductive sheet must be adhered to the bearing end face before grinding can proceed.

[0004] The rough and fine grinding of the inner diameter, raceway 23, groove 21, and two flanges of the inner ring of the non-magnetic steel composite bearing requires two bonding and removal of magnetic guide sheets each time, for a total of four bonding and removal operations. During rough grinding, after the first bonding of the magnetic guide sheet to one end face of the inner ring reference surface, the rough grinding of the inner diameter, raceway 23, groove 21, and flange on one side of the reference surface is completed, and then the first bonded magnetic guide sheet is removed. For the other non-reference end face of the inner ring, the magnetic guide sheet is bonded a second time, and the rough grinding of the other non-reference flange is completed, and then the second bonded magnetic guide sheet is removed. In the precision grinding process, after the third bonding of the magnetic guide sheet to one end face of the inner ring of the non-magnetic steel composite bearing with reference surface, the inner diameter, raceway 23, groove 21, and the flange on one side of the reference surface are precision ground. Then, the third bonding of the magnetic guide sheet is removed. For the other non-reference end face of the inner ring of the non-magnetic steel composite bearing, the magnetic guide sheet is bonded for the fourth time, and the other non-reference flange is precision ground. Then, the fourth bonding of the magnetic guide sheet is removed. Because the grinding process of the inner ring of the non-magnetic steel composite bearing requires four bonding and removal of the magnetic guide sheet, the production cycle is long, and the high manpower required results in low processing efficiency. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a machining process for the inner ring of a non-magnetic steel composite bearing, which eliminates the need for grinding the inner ring using a magnetic sheet, thereby improving the machining efficiency of the inner ring and reducing the production cycle.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a machining process for the inner ring of a non-magnetic steel combined bearing, comprising the following steps: Step 1, turning the blank into the shape of the inner ring of a non-magnetic steel combined bearing, and machining base surface auxiliary steps and non-base surface auxiliary steps at both ends of the inner ring of the non-magnetic steel combined bearing, and performing heat treatment after machining; Step 2: Rough grinding is performed on both end faces, outer diameter, and inner diameter of the inner ring of the heat-treated non-magnetic steel composite bearing. Step 3: Use an electromagnetic centerless grinder to perform rough grinding on the groove, raceway, base side flange, and non-base side flange of the inner ring of the non-magnetic steel composite bearing in sequence. Step 4: Perform precision grinding on both ends, outer diameter, and inner diameter of the inner ring of the non-magnetic steel composite bearing in sequence; Step 5: Use an electromagnetic centerless grinder to perform precision grinding on the groove, raceway, base surface side flange, and non-base surface side flange of the inner ring of the non-magnetic steel composite bearing in sequence; Step 6: After fine grinding, grind away the auxiliary steps on the base surface and the auxiliary steps on the non-base surface; Step 7: Use an ultra-precision machine tool to perform ultra-precision machining on the grooves and raceways of the inner ring of the non-magnetic steel combined bearing.

[0007] As a preferred option, in step two, a double-sided grinding machine is used to perform rough grinding on both ends of the inner ring of the non-magnetic steel composite bearing.

[0008] As a preferred option, in step two, a centerless grinder is used to rough grind the outer diameter of the inner ring of the non-magnetic steel composite bearing.

[0009] As a preferred option, in step two, a centerless grinder is used to rough grind the inner diameter of the inner ring of the non-magnetic steel composite bearing.

[0010] As a preferred embodiment, in steps three and five, the inner ring of the non-magnetic steel composite bearing is clamped onto an electromagnetic centerless grinder for machining. During clamping, a magnetic core with a stepped end passes through the inner diameter of the inner ring of the non-magnetic steel composite bearing, attracting the inner ring of the non-magnetic steel composite bearing to the magnetic pole of the electromagnetic centerless grinder. The magnetic core has a spindle section and a disc-shaped platform stage. The outer diameter of the platform stage is larger than the inner diameter of the inner ring of the non-magnetic steel composite bearing. During attraction, the spindle section of the magnetic core passes through the inner ring of the non-magnetic steel composite bearing and is attracted to the magnetic pole. The platform stage abuts against the end face of the inner ring of the non-magnetic steel composite bearing. The magnetic pole of the electromagnetic centerless grinder is a solid magnetic pole, and the outer diameter of the magnetic pole is larger than the outer diameter of the inner ring of the non-magnetic steel composite bearing.

[0011] As a preferred option, after the rough grinding in step three, the inner ring of the non-magnetic steel combined bearing is subjected to a flaw detection and a full inspection pickling. After pickling, the inner ring of the non-magnetic steel combined bearing is subjected to stabilization treatment at a stabilization temperature of 120±5℃ for 6 hours. After stabilization treatment, the chamfer and oil groove are machined.

[0012] As a preferred option, in step four, a double-sided grinding machine is used to perform precision grinding on both ends of the inner ring of the non-magnetic steel combined bearing, a centerless grinder is used to perform precision grinding on the outer diameter of the inner ring of the non-magnetic steel combined bearing, an outer diameter grinding machine is used to perform precision grinding on the outer diameter of the inner ring of the non-magnetic steel combined bearing, a centerless grinder is used to perform precision grinding on the inner diameter of the inner ring of the non-magnetic steel combined bearing, and an outer diameter grinding machine is used to perform final grinding on the outer diameter of the inner ring of the non-magnetic steel combined bearing.

[0013] As a preferred option, after the precision grinding in step five is completed, a second flaw detection is performed on the inner ring of the precision-ground non-magnetic steel combined bearing, and a first random inspection and pickling is performed on the inner ring of the non-magnetic steel combined bearing.

[0014] As a preferred solution, an electromagnetic centerless grinder is used to remove the base surface auxiliary steps and non-base surface auxiliary steps of the inner ring of the non-magnetic steel combined bearing. A magnetic core with a step at one end is passed through the inner diameter of the inner ring of the non-magnetic steel combined bearing, and the inner ring of the non-magnetic steel combined bearing is attracted to the magnetic pole of the electromagnetic centerless grinder. The base surface auxiliary steps on one side are ground. The inner ring of the non-magnetic steel combined bearing is then turned around, and a magnetic core with a step at one end is passed through the inner diameter of the inner ring of the non-magnetic steel combined bearing, and the inner ring of the non-magnetic steel combined bearing is attracted to the magnetic pole of the electromagnetic centerless grinder. The non-base surface auxiliary steps on the other side are then ground.

[0015] The beneficial effects of this application are as follows: 1. This application uses a magnetic core with a stepped end to cooperate with the solid magnetic pole of an electromagnetic centerless grinder. This allows the inner ring of the non-magnetic steel composite bearing to be ground directly by electromagnetic adsorption, eliminating the need to manufacture high-precision magnetic sheets; secondly, it eliminates the need for four processes of bonding and removing magnetic sheets, greatly shortening the production cycle and reducing labor costs.

[0016] 2. Due to the relatively wide width of the non-magnetic steel composite bearing, this application adds two process auxiliary steps to ensure that the inner ring of the bearing rotates smoothly during inner diameter grinding, avoiding unstable inner diameter grinding dimensions and the generation of a large number of scraps. If no process auxiliary steps are set or only one auxiliary step is set, the inner ring of the bearing will rotate in an 8-shape during inner diameter grinding, resulting in a large number of scraps in the inner diameter grinding dimensions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the inner ring of the non-magnetic steel combined bearing in this invention.

[0018] Figure 2This is a schematic diagram of the auxiliary step in this invention.

[0019] Figure 3 This is a schematic diagram of the grinding process of the inner diameter of the inner ring of the non-magnetic steel combined bearing in this invention.

[0020] Figure 4 This is a schematic diagram of the grinding process of the inner ring groove of the non-magnetic steel combined bearing in this invention.

[0021] Figure 5 This is a schematic diagram of the non-base surface flange grinding process of the inner ring of the non-magnetic steel combined bearing in this invention.

[0022] Figure 6 This is a schematic diagram of the grinding process of the inner ring base surface flange of the non-magnetic steel combined bearing in this invention.

[0023] Figure 7 This is a schematic diagram of the grinding process of the inner ring raceway of the non-magnetic steel combined bearing in this invention.

[0024] Figure 8 This is a schematic diagram of the auxiliary step grinding process on the inner ring base surface of the non-magnetic steel combined bearing in this invention.

[0025] Figure 9 This is a schematic diagram of the non-base surface auxiliary step grinding process of the inner ring of the non-magnetic steel combined bearing in this invention.

[0026] Figure 10 This is a schematic diagram of the ultra-precision machining of the inner ring groove of the non-magnetic steel combined bearing in this invention.

[0027] Figure 11 This is a schematic diagram of the ultra-precision machining of the inner ring raceway of the non-magnetic steel combined bearing in this invention.

[0028] Illustration markings: 1. Magnetic core, 11. Mandrel section, 12. Step, 2. Inner ring of non-magnetic steel combined bearing, 21. Groove, 22. Base surface side guard, 23. Raceway, 24. Non-base surface side guard, 3. Base surface auxiliary step, 4. Non-base surface auxiliary step, 5. Roller, 51. Inner diameter grinding wheel, 6. Grinding wheel for groove grinding, 61. Grinding wheel for non-base surface side guard grinding, 62. Grinding wheel for base surface side guard grinding, 63. Grinding wheel for raceway grinding, 64. Grinding wheel for base surface auxiliary step, 65. Grinding wheel for non-base surface auxiliary step, 7. Raceway ultra-precision machine tool end face support, 71. End face clamping roller, 72. Groove ultra-precision oilstone, 73. Raceway ultra-precision oilstone. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that, in the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Please see Figure 1-11 This invention provides a machining process for the inner ring of a non-magnetic steel composite bearing, comprising the following steps: Step 1: On a conventional lathe, the blank is machined into the shape of the inner ring 2 of the non-magnetic steel combined bearing. Base surface auxiliary steps 3 and non-base surface auxiliary steps 4 are machined at both ends of the inner ring 2 of the non-magnetic steel combined bearing. After machining, heat treatment is performed.

[0031] Step 2: Rough grinding is performed on the two end faces, outer diameter, and inner diameter of the heat-treated non-magnetic steel composite bearing inner ring 2. On a double-sided grinding machine, the two end faces of the inner ring 2 are rough ground to standardize the inner ring height, controlling the dimensional variation within 0.01mm to reduce the grinding allowance on the end faces. On a centerless grinder, the outer diameter of the inner ring 2 is rough ground to standardize the outer diameter, controlling the dimensional variation within 0.01mm to reduce the grinding allowance on the outer diameter.

[0032] The inner diameter of the inner ring 2 of the non-magnetic steel composite bearing is rough ground on a roller-type centerless clamping inner diameter grinding machine to standardize the inner diameter size, controlling the dimensional variation within 0.03mm and reducing the grinding allowance. On the roller-type centerless clamping inner diameter grinding machine, the rollers 5 must have a suitable width to ensure they can press against the entire outer diameter of the inner ring 2 of the non-magnetic steel composite bearing. Two rollers 5 are used to ensure that both rollers 5 are in contact with the outer diameter of the inner ring 2 and the two auxiliary steps, facilitating smooth operation of the inner ring 2 during inner diameter grinding and reducing scrap caused by unstable inner diameter dimensions. On the roller-type centerless clamping inner diameter grinding machine, the inner diameter grinding wheel 51 extends into the inner ring 2 of the non-magnetic steel composite bearing for inner diameter grinding.

[0033] Step 3: Use an electromagnetic centerless grinder to perform rough grinding on the groove 21, raceway 23, base surface side flange 22, and non-base surface side flange 24 of the inner ring 2 of the non-magnetic steel combined bearing in sequence.

[0034] On an electromagnetic centerless grinding machine, a magnetic core 1 with a stepped end is inserted through the inner diameter of the inner ring 2 of a non-magnetic steel composite bearing. The inner ring 2 is then attracted to the magnetic poles of the electromagnetic centerless grinding machine, and the groove 21 of the inner ring 2 is rough-ground to reduce the grinding allowance. To ensure smooth and efficient operation of the workpiece during processing, the magnetism should be increased by using solid magnetic poles, and the groove 21 should be ground using a grinding wheel 6.

[0035] On an electromagnetic centerless grinding machine, a magnetic core 1 with a stepped end passes through the inner diameter of the inner ring 2 of a non-magnetic steel composite bearing, attracting the inner ring 2 onto the magnetic pole of the electromagnetic centerless grinding machine. The magnetic core 1 is magnetically attracted to the magnetic pole of the electromagnetic centerless grinding machine, and the raceway 23 of the inner ring 2 of the non-magnetic steel composite bearing is rough ground to reduce the grinding allowance of the raceway 23. The raceway 23 is then ground by a grinding wheel 63.

[0036] On an electromagnetic centerless grinding machine, a magnetic core 1 with a stepped end is inserted through the inner diameter of the inner ring 2 of the non-magnetic steel composite bearing, attracting the inner ring 2 of the non-magnetic steel composite bearing to the magnetic pole of the electromagnetic centerless grinding machine. This allows for rough grinding of the base surface side guard 22 of the inner ring 2, reducing the grinding allowance of the base surface side guard 22. The base surface side guard 22 is then ground using a grinding wheel 62.

[0037] On an electromagnetic centerless grinding machine, a magnetic core 1 with a stepped end passes through the inner diameter of the inner ring 2 of a non-magnetic steel composite bearing, attracting the inner ring 2 onto the magnetic poles of the electromagnetic centerless grinding machine. This allows for rough grinding of the non-basal surface side flange 24 of the inner ring 2, reducing the grinding allowance. The non-basal surface side flange 24 is then ground using a grinding wheel 61. During machining of the inner ring 2 of the non-magnetic steel composite bearing on the electromagnetic centerless grinding machine, a grinding support is provided to support the inner ring 2, located at the lower end of the inner ring 2.

[0038] After rough grinding, the inner ring 2 of the non-magnetic steel combined bearing is subjected to a flaw detection and a full inspection pickling. After pickling, the inner ring 2 of the non-magnetic steel combined bearing is subjected to stabilization treatment at a stabilization temperature of 120±5℃ for 6 hours. After stabilization treatment, the chamfer and oil groove are machined.

[0039] Step 4: Perform precision grinding on both end faces, outer diameter, and inner diameter of the inner ring 2 of the non-magnetic steel combined bearing. In step 4, the two end faces of the inner ring 2 of the non-magnetic steel combined bearing are precision ground on a double-sided grinding machine to meet the end face dimensional requirements of the product drawings.

[0040] The outer diameter of the inner ring 2 of the non-magnetic steel composite bearing is precision ground on a centerless grinder, and then precision ground on a roller-type outer diameter grinding machine to further improve the machining accuracy of the outer diameter and provide a better reference for the precision grinding of the inner diameter. The inner diameter of the inner ring 2 of the non-magnetic steel composite bearing is then precision ground on a roller-type centerless clamping inner diameter grinding machine to meet the inner diameter dimensional requirements of the product drawings. The rollers must have a suitable width to ensure that they can press against the entire outer diameter of the inner ring of the non-magnetic steel composite bearing.

[0041] The outer diameter of the inner ring 2 of the non-magnetic steel composite bearing is finally ground on a roller-type outer diameter grinding machine to further improve the machining accuracy of the outer diameter and provide a better reference for the fine grinding of the groove 21 and the raceway 23.

[0042] Step 5: Using an electromagnetic centerless grinder, the groove 21, raceway 23, base surface side flange 22, and non-base surface side flange 24 of the inner ring 2 of the non-magnetic steel composite bearing are precision ground sequentially. On the electromagnetic centerless grinder, a magnetic core 1 with a stepped end is passed through the inner diameter of the inner ring 2 of the non-magnetic steel composite bearing, attracting the inner ring 2 onto the magnetic pole of the electromagnetic centerless grinder for precision grinding of the groove 21. To ensure smooth and efficient operation of the workpiece during processing, the magnetism should be increased, and solid magnetic poles should be used.

[0043] On an electromagnetic centerless grinding machine, a magnetic core 1 with a step at one end is passed through the inner diameter of the inner ring 2 of the non-magnetic steel combined bearing, and the inner ring 2 of the non-magnetic steel combined bearing is attracted to the magnetic pole of the electromagnetic centerless grinding machine to perform precision grinding on the raceway 23 of the inner ring 2 of the non-magnetic steel combined bearing.

[0044] On an electromagnetic centerless grinding machine, a magnetic core 1 with a step at one end is passed through the inner diameter of the inner ring 2 of the non-magnetic steel combined bearing, and the inner ring 2 of the non-magnetic steel combined bearing is attracted to the magnetic pole of the electromagnetic centerless grinding machine to perform precision grinding on the base side edge 22 of the inner ring 2 of the non-magnetic steel combined bearing.

[0045] On an electromagnetic centerless grinding machine, a magnetic core 1 with a step at one end is passed through the inner diameter of the inner ring 2 of the non-magnetic steel combined bearing, and the inner ring 2 of the non-magnetic steel combined bearing is attracted to the magnetic pole of the electromagnetic centerless grinding machine to perform precision grinding on the non-base side flange 24 of the inner ring 2 of the non-magnetic steel combined bearing.

[0046] After the precision grinding is completed, the inner ring 2 of the precision-ground non-magnetic steel combined bearing is subjected to secondary flaw detection, and the inner ring 2 of the non-magnetic steel combined bearing is subjected to a first random inspection and pickling.

[0047] Step Six: After precision grinding, grind away the base surface auxiliary step 3 and the non-base surface auxiliary step 4. Use an electromagnetic centerless grinder to remove the base surface auxiliary step 3 and the non-base surface auxiliary step 4 from the inner ring 2 of the non-magnetic steel combined bearing. Use a magnetic core 1 with a step at one end to pass through the inner diameter of the inner ring 2 of the non-magnetic steel combined bearing, and attract the inner ring 2 of the non-magnetic steel combined bearing to the magnetic pole of the electromagnetic centerless grinder. Use a grinding wheel 64 to grind away one side of the base surface auxiliary step 3. Turn the inner ring 2 of the non-magnetic steel combined bearing around, use a magnetic core 1 with a step at one end to pass through the inner diameter of the inner ring 2 of the non-magnetic steel combined bearing, and attract the inner ring 2 of the non-magnetic steel combined bearing to the magnetic pole of the electromagnetic centerless grinder. Use a grinding wheel 65 to grind away the other side of the non-base surface auxiliary step 4.

[0048] Step 7: Perform ultra-precision machining on the inner ring 2 of the non-magnetic steel composite bearing using an end-face clamping ultra-precision machine tool. The inner ring 2 of the non-magnetic steel composite bearing is clamped by the end-face clamping roller 71 and the end face retainer 7 of the raceway ultra-precision machine tool. Then, the raceway 21 and raceway 23 are ultra-precision machined using the raceway ultra-precision whetstone 72 and the raceway ultra-precision whetstone 73, respectively.

[0049] In steps three and five, the inner ring 2 of the non-magnetic steel combined bearing is clamped onto an electromagnetic centerless grinder for processing. During clamping, a magnetic core 1 with a stepped end passes through the inner diameter of the inner ring 2 of the non-magnetic steel combined bearing, attracting the inner ring 2 of the non-magnetic steel combined bearing to the magnetic pole of the electromagnetic centerless grinder. The magnetic core 1 has a spindle section 11 and a disc-shaped platform stage 12. The outer diameter of the platform stage 12 is larger than the inner diameter of the inner ring 2 of the non-magnetic steel combined bearing. During attraction, the spindle section 11 of the magnetic core 1 passes through the inner ring 2 of the non-magnetic steel combined bearing and is attracted to the magnetic pole. The platform stage 12 abuts against the end face of the inner ring 2 of the non-magnetic steel combined bearing. The magnetic pole of the electromagnetic centerless grinder is a solid magnetic pole, and the outer diameter of the magnetic pole is larger than the outer diameter of the inner ring 2 of the non-magnetic steel combined bearing.

[0050] It should be noted that the above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A machining process for the inner ring of a non-magnetic steel composite bearing, characterized in that, Includes the following steps: Step 1: The blank is machined into the shape of the inner ring (2) of the non-magnetic steel combined bearing, and the base surface auxiliary steps (3) and non-base surface auxiliary steps (4) are machined at both ends of the inner ring (2) of the non-magnetic steel combined bearing. After machining, heat treatment is performed. Step 2: Rough grinding is performed on both ends, outer diameter, and inner diameter of the heat-treated non-magnetic steel combined bearing inner ring (2). Step 3: Use an electromagnetic centerless grinder to perform rough grinding on the groove (21), raceway (23), base surface side flange (22), and non-base surface side flange (24) of the inner ring (2) of the non-magnetic steel combined bearing in sequence; Step 4: Perform precision grinding on both ends, outer diameter, and inner diameter of the inner ring (2) of the non-magnetic steel combined bearing in sequence; Step 5: Use an electromagnetic centerless grinder to perform precision grinding on the groove (21), raceway (23), base surface side flange (22), and non-base surface side flange (24) of the inner ring (2) of the non-magnetic steel combined bearing in sequence; Step 6: After fine grinding, grind off the base surface auxiliary step (3) and the non-base surface auxiliary step (4). Step 7: Use an ultra-precision machine tool to perform ultra-precision machining on the inner ring (2) of the non-magnetic steel combined bearing, including the groove (21) and raceway (23).

2. The machining process for the inner ring of a non-magnetic steel combined bearing according to claim 1, characterized in that, In step two, a double-sided grinding machine is used to rough grind the two ends of the inner ring (2) of the non-magnetic steel combined bearing.

3. The machining process for the inner ring of a non-magnetic steel combined bearing according to claim 1, characterized in that, In step two, a centerless grinder is used to rough grind the outer diameter of the inner ring (2) of the non-magnetic steel combined bearing.

4. The machining process for the inner ring of a non-magnetic steel combined bearing according to claim 1, characterized in that, In step two, a centerless grinder is used to rough grind the inner diameter of the inner ring (2) of the non-magnetic steel combined bearing.

5. The machining process for the inner ring of a non-magnetic steel combined bearing according to claim 1, characterized in that, In steps three and five, the inner ring (2) of the non-magnetic steel combined bearing is clamped onto the electromagnetic centerless grinder for processing. During clamping, a magnetic core (1) with a step at one end is passed through the inner diameter of the inner ring (2) of the non-magnetic steel combined bearing to attract the inner ring (2) of the non-magnetic steel combined bearing to the magnetic pole of the electromagnetic centerless grinder. The magnetic core (1) has a spindle section (11) and a disc-shaped platform stage (12). The outer diameter of the platform stage (12) is larger than the inner diameter of the inner ring (2) of the non-magnetic steel combined bearing. During attraction, the spindle section (11) of the magnetic core (1) passes through the inner ring (2) of the non-magnetic steel combined bearing and is attracted to the magnetic pole. The platform stage (12) abuts against the end face of the inner ring (2) of the non-magnetic steel combined bearing. The magnetic pole of the electromagnetic centerless grinder is a solid magnetic pole, and the outer diameter of the magnetic pole is larger than the outer diameter of the inner ring (2) of the non-magnetic steel combined bearing.

6. The machining process for the inner ring of a non-magnetic steel combined bearing according to claim 5, characterized in that, After the rough grinding in step three, the inner ring (2) of the non-magnetic steel combined bearing is subjected to a flaw detection and a full inspection pickling. After pickling, the inner ring (2) of the non-magnetic steel combined bearing is subjected to stabilization treatment at a temperature of 120±5℃ for 6 hours. After stabilization treatment, the chamfer and oil groove are machined.

7. The machining process for the inner ring of a non-magnetic steel combined bearing according to claim 6, characterized in that, In step four, a double-sided grinding machine is used to perform fine grinding on both ends of the inner ring (2) of the non-magnetic steel combined bearing, a centerless grinding machine is used to perform fine grinding on the outer diameter of the inner ring (2) of the non-magnetic steel combined bearing, an outer diameter grinding machine is used to perform fine grinding on the outer diameter of the inner ring (2) of the non-magnetic steel combined bearing, a centerless grinding machine is used to perform fine grinding on the inner diameter of the inner ring (2) of the non-magnetic steel combined bearing, and an outer diameter grinding machine is used to perform final grinding on the outer diameter of the inner ring (2) of the non-magnetic steel combined bearing.

8. The machining process for the inner ring of a non-magnetic steel combined bearing according to claim 7, characterized in that, After the fine grinding process is completed in step five, a second flaw detection is performed on the inner ring (2) of the non-magnetic steel combined bearing that has been finely ground, and a first sampling pickling is performed on the inner ring (2) of the non-magnetic steel combined bearing.

9. The machining process for the inner ring of a non-magnetic steel combined bearing according to claim 8, characterized in that, The base surface auxiliary step (3) and non-base surface auxiliary step (4) of the inner ring (2) of the non-magnetic steel combined bearing are removed by using an electromagnetic centerless grinder. A magnetic core (1) with a step at one end is passed through the inner diameter of the inner ring (2) of the non-magnetic steel combined bearing to attract the inner ring (2) of the non-magnetic steel combined bearing to the magnetic pole of the electromagnetic centerless grinder. The base surface auxiliary step (3) on one side is ground. The inner ring (2) of the non-magnetic steel combined bearing is turned around. A magnetic core (1) with a step at one end is passed through the inner diameter of the inner ring (2) of the non-magnetic steel combined bearing to attract the inner ring (2) of the non-magnetic steel combined bearing to the magnetic pole of the electromagnetic centerless grinder. The non-base surface auxiliary step (4) on the other side is ground.

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