Double-row roller bearing ring stress fracture machining process

Abstract

According to the stress fracture machining technology for the double-row roller bearing ring, an inner ring or an outer ring which is paired in a split mode is of an integral structure when machined in the technology, and stress fracture grooves are formed in the inner ring or the outer ring of the integral structure; after the inner ring or the outer ring of the integral structure is machined, the inner ring or the outer ring is fractured into the inner ring or the outer ring which is paired in a split mode through the stress fracture groove which is formed in advance, and therefore it is guaranteed that the machining sizes of the inner ring or the outer ring which is paired in the split mode are the same. Therefore, the problem that the working reliability and the service life of the double-row roller bearing are affected due to different working stresses caused by different machining sizes of the split paired inner ring or outer ring of the double-row roller bearing is solved.

Description

Technical Field

[0001] The invention relates to the technical field of double-row roller bearing ring processing, and in particular to a double-row roller bearing ring stress fracture processing technology. Background Art

[0002] In the existing double-row roller bearing structure, in order to facilitate the assembly of the double-row roller bearing, the inner ring or outer ring adopts a split pairing structure. The split-paired inner ring or outer ring is processed independently during the processing. Due to the existence of processing errors, the final processing dimensions of the split-paired inner ring or outer ring are different. Therefore, after assembly, the split-paired inner ring or outer ring is subjected to different stress states with the rollers during the working process. The split-paired inner ring or outer ring has a problem that one of the split-paired inner ring or outer ring has a high working stress and the other has a low working stress. As a result, the working reliability and service life of the double-row roller bearing are affected. Summary of the invention

[0003] In order to overcome the shortcomings of the background technology, the present invention discloses a stress fracture processing technology for a double-row roller bearing ring to ensure that the processing dimensions of the inner ring or outer ring of the split pair are the same, and to solve the problem that the working reliability and service life of the double-row roller bearing are affected by the different working stresses of the inner ring or outer ring of the split pair.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a double-row roller bearing ring stress fracture processing technology, which is used for processing double-row roller bearing rings; the double-row roller bearing includes an outer ring, an inner ring, and rollers; a plurality of rollers are rollingly arranged between the raceways of the outer ring and the inner ring; the outer ring includes an outer ring A and an outer ring B, and a stress fracture groove is arranged between the outer ring A and the outer ring B; the outer ring A and the outer ring B are integral structures during the turning, heat treatment and grinding processes; after the outer ring A and the outer ring B are ground, they are fractured along the stress fracture groove by external force, so that the outer ring A and the outer ring B become separated structures.

[0005] Preferably, the inner ring includes inner ring A and inner ring B, and a stress fracture groove is arranged between inner ring A and inner ring B; inner ring A and inner ring B are integral structures during turning, heat treatment and grinding; after inner ring A and inner ring B are ground, they are fractured along the stress fracture groove by external force, so that inner ring A and inner ring B become separated structures.

[0006] Furthermore, during turning, corresponding stress fracture grooves are machined on the inner and outer diameters of the ring. The stress fracture grooves are sharp-angled V-shaped grooves with an angle between 50-70°. The bottom thickness of the cross section corresponding to the sharp corners of the two stress fracture grooves is 0.8-1.0 mm. During the grinding process, the stress fracture grooves are turned and trimmed for the second time. After the second turning and trimming, the bottom thickness of the cross section corresponding to the sharp corners of the two stress fracture grooves is 0.5-0.7 mm.

[0007] Furthermore, the outer ring and the inner ring grinding process includes several grinding process steps, and a stabilization heat treatment is performed after each grinding process.

[0008] Furthermore, before the outer ring or the inner ring is separated along the stress fracture groove, a pre-crack groove is machined on the stress fracture groove by wire cutting.

[0009] Furthermore, before the outer ring or the inner ring is separated along the stress fracture groove, a pairing number and an assembly reference line are processed on the outer ring or the inner ring.

[0010] Furthermore, the outer ring or the inner ring needs to be cleaned after separation along the stress rupture groove and before assembly.

[0011] Furthermore, a plurality of outer locking columns are correspondingly arranged between the outer ring A and the outer ring B, or a plurality of inner locking columns are correspondingly arranged between the inner ring A and the inner ring B; after the double-row roller bearing is assembled, the outer locking columns corresponding to the outer ring A and the outer ring B are fixedly connected by a locking ring, or the inner locking columns corresponding to the inner ring A and the inner ring B are fixedly connected by a locking ring.

[0012] Due to the adoption of the technical scheme as described above, the present invention has the following beneficial effects: a double-row roller bearing ring stress fracture processing technology disclosed in the present invention processes a split-paired inner ring or outer ring as an integral structure, and a stress fracture groove is provided on the inner ring or outer ring of the integral structure; after the inner ring or outer ring of the integral structure is processed, it is fractured into two split-paired inner rings or outer rings through the pre-set stress fracture groove, thereby ensuring that the processing dimensions of the split-paired inner rings or outer rings are the same, thereby solving the problem that the working stress of the double-row roller bearing is different due to the different processing dimensions of the split-paired inner rings or outer rings, which in turn affects the working reliability and service life of the double-row roller bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the cross-sectional structure of a double-row roller bearing of Embodiment 1; Figure 2 This is a schematic diagram of the cross-sectional structure of the outer ring of Embodiment 1; Figure 3 This is a schematic diagram of the outer lock cylinder in the direction of C of the first embodiment; Figure 4 This is a schematic diagram of the outer ring A and the outer ring B of the first embodiment after being paired; Figure 5 It is a schematic diagram of the assembly of a double-row roller bearing of the first embodiment; Figure 6 It is a schematic diagram of the cross-sectional structure of a double-row roller bearing of Embodiment 2; Figure 7 It is a schematic diagram of the cross-sectional structure of the inner ring of the second embodiment; Figure 8It is a schematic diagram of the assembly of the double-row roller bearing of the second embodiment.

[0014] In the figure: 1. Outer ring; 1.1. Outer ring A; 1.2. Outer ring B; 1.3. Outer ring stress fracture groove; 1.4. Outer locking column; 2. Inner ring; 2.1. Inner ring A; 2.2. Inner ring B; 2.3. Inner ring stress fracture groove; 2.4. Inner locking column; 3. Roller; 4. Locking ring; 5. Assembly tool shaft; 6. V-groove assembly tool. DETAILED DESCRIPTION

[0015] The present invention can be explained in detail by the following examples, and the purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0016] Example 1, see the attached specification Figure 1 , 2 ,3,4,5: In the instruction manual Figure 1 In FIG. 1 , a double-row roller bearing structure is shown, which includes an outer ring 1, an inner ring 2, and rollers 3. A plurality of rollers 3 are arranged in an array and rolling between the raceways of the outer ring 1 and the inner ring 2; see the attached manual. Figure 2 : The outer ring 1 includes the split and paired outer ring A1.1 and outer ring B1.2; see the appendix of the manual Figure 3 , 4 : The outer circumferences of the split matched outer rings A1.1 and B1.2 are processed with six outer locking pins 1.4, and the outer locking pins 1.4 of the outer rings A1.1 and B1.2 are fixedly provided with locking rings 4. The outer circumferences of the outer locking pins 1.4 are interference fit with the inner holes of the locking rings 4, and the outer rings A1.1 and B1.2 are fixedly connected to prevent the split matched outer rings A1.1 and B1.2 of the double row roller bearing from being separated during transportation; the outer rings A1.1 and B1.2 are integral structures during the processing, and after the processing is completed, they are broken into two split matched outer rings A1.1 and B1.2 through the pre-set outer ring stress fracture grooves 1.3, thereby ensuring that the outer diameters and raceway diameters of the split matched outer rings A1.1 and B1.2 are the same; the specific processing technology is as follows: S1. Turning: Turn the end face, outer cylindrical surface, inner cylindrical surface (where the frame seal ring is mounted), raceway, and end face of the other side of the outer ring 1; use a forming lane to turn the outer ring stress fracture groove 1.3 at the outer cylindrical surface and the outer ring stress fracture groove 1.3 at the inner raceway; the outer ring stress fracture groove 1.3 is a sharp-angle V-shaped groove, and the two sharp-angle V-shaped grooves are centered in the axial position with an angle of 60°; the bottom thickness of the section corresponding to the sharp corners of the two outer ring stress fracture grooves 1.3 is 0.9mm; S2, milling processing: use a milling cutter to evenly mill six outer locking cylinders 1.4 on the outer cylindrical surface of the outer ring 1; S3. Heat treatment: S31, stress relief tempering: temperature 170-180℃, keep warm for 7-9 hours, and cool naturally to room temperature; stress relief tempering is used to eliminate residual stress from turning and reduce deformation of outer ring 1 during subsequent heat treatment; S32, salt bath quenching: temperature 850-900℃, keep warm for 1-2 hours, immerse in molten salt bath for rapid cooling; S33, tempering: temperature 200-400℃, keep warm for 1-2 hours, and cool naturally to room temperature; S34, quenching and tempering: temperature 500-650℃, keep warm for 1-2 hours, immerse in quenching oil for rapid cooling; S35, normalizing: temperature 840-900℃, keep warm for 1-2 hours, and cool naturally to room temperature; S4. Grinding: S41, initial grinding: Initial grinding of the end faces, ribs, outer circle, inner diameter (for the skeleton seal ring), and raceway on both sides; use the forming track to finish the outer circle surface and the outer ring stress fracture groove 1.3 on the inner raceway, and the bottom thickness of the section corresponding to the sharp corners of the two outer ring stress fracture grooves 1.3 is 0.6mm; S42, stabilization heat treatment after initial grinding: temperature 130-160℃, keep warm for 7-9 hours, and cool naturally to room temperature; stabilization heat treatment after initial grinding is used to eliminate the residual internal stress of outer ring 1 after initial grinding; S43, fine grinding: fine grinding of both side end faces, ribs, outer circle, raceway, sanding of non-ground surfaces; grinding of outer circle to eliminate the support marks left on the outer circle during fine grinding of raceway; S44, post-fine grinding stabilization heat treatment: temperature 120-150°C, keep warm for 5-7 hours, and cool naturally to room temperature; post-fine grinding stabilization heat treatment is used to eliminate the residual internal stress of the outer ring 1 after fine grinding; S5, wire cutting pre-crack groove: the pre-crack groove is set between two adjacent outer locking columns 1.4, avoiding the outer locking column 1.4; the depth of the pre-crack groove is 6mm under the sharp corner of the outer circle stress fracture groove 1.3 on the outer cylindrical surface; S6. Marking the pairing number and assembly reference line: The pairing number and assembly reference line are engraved on the outer surface of the outer ring 1 by laser or electro-etching; S7, stress fracture: Place outer ring 1 horizontally on a workbench covered with a rubber mat, place the blade of a flat shovel at the pre-crack groove, and tap the flat shovel lightly with a hammer. The outer ring 1 will fracture along the stress fracture groove, separating the outer ring 1 into outer ring A1.1 and outer ring B1.2; S8. Cleaning: The separated outer rings A1.1 and B1.2 are cleaned by spraying with cleaning oil to remove fine chips generated during the fracture.

[0017] In this embodiment, the split paired outer ring A1.1 and outer ring B1.2 are processed as an integral structure during the S1 turning process and the S4 grinding process, thereby ensuring that the split paired outer ring A1.1 and outer ring B1.2 have the same processing dimensions, thereby solving the problem that the double row roller bearing has different working stresses due to different processing dimensions of the split paired outer ring A1.1 and outer ring B1.2, which in turn affects the working reliability and service life of the double row roller bearing.

[0018] In this embodiment, the processing technology of the outer ring stress fracture groove 1.3 is the first technical core of the double-row roller bearing ring stress fracture process, that is, the outer ring stress fracture groove 1.3 is processed in the turning process of S1, and is subjected to secondary turning and trimming in the primary grinding process of S41, and at the same time, the bottom thickness size of the cross section corresponding to the sharp corners of the two stress fracture grooves after the turning process and the secondary turning and trimming must be ensured; this process design is based on solving the following two problems: 1. After the turning process of S1 is completed, after the heat treatment of S3, the bottom thickness size of the cross section corresponding to the sharp corners of the two outer ring stress fracture grooves 1.3 is the same as the thickness size of the outer ring 1 ( 14.5mm) is very different, so there is a huge internal stress in the cross section corresponding to the sharp corners of the two outer ring stress fracture grooves 1.3, and at the same time, there are fine cracks at the roots of the two corresponding outer ring stress fracture grooves 1.3 (caused by the huge internal stress in the cross section corresponding to the sharp corners of the two outer ring stress fracture grooves 1.3); if the bottom thickness of the cross section corresponding to the sharp corners of the two outer ring stress fracture grooves 1.3 is too small (such as less than 0.5mm), under the condition that there are huge internal stress and fine cracks in the cross section corresponding to the sharp corners of the two outer ring stress fracture grooves 1.3, the vibration effect during the grinding process of S4 may cause the outer ring 1 to fracture at the outer ring stress. 1.3 of the outer ring 1 is fractured, resulting in the failure of the machining of the outer ring 1; therefore, in the machining process of S1, the thickness of the cross section at the corresponding sharp corners of the two outer ring stress fracture grooves 1.3 is controlled to be 0.8-1.0mm; 2. After the heat treatment of S3, the distribution of the fine cracks generated at the roots of the two corresponding outer ring stress fracture grooves 1.3 is not symmetrical. If the fine cracks at the roots of the two corresponding outer ring stress fracture grooves 1.3 are not eliminated by secondary turning, when the outer ring 1 is stress fractured along the roots of the two corresponding outer ring stress fracture grooves 1.3, the fracture surface will be affected by the two corresponding outer ring stress fracture grooves. Due to the asymmetric distribution of fine cracks at the sharp corner root of the crack groove 1.3, the fracture surface will be seriously uneven; after performing secondary turning and finishing to eliminate the fine cracks at the sharp corner root of the two corresponding outer ring stress fracture grooves 1.3, stress fracture will present an ideal controllable fracture surface; therefore, in the double-row roller bearing ring stress fracture processing technology of the invention, the outer ring stress fracture groove 1.3 must be turned in the S1 turning process and the secondary turning and finishing in the S41 primary grinding process. Both processes must exist at the same time, and neither of them can be missing, otherwise it is impossible to control the double-row roller bearing ring stress fracture processing process and the quality of the cross section after fracture; In addition, in the double-row roller bearing ring stress fracture processing technology of the invention, stable heat treatment is performed after each grinding process, which is the second technical core of the double-row roller bearing ring stress fracture process; in the double-row roller bearing ring stress fracture processing technology, new stress will be generated after each grinding process. If stable heat treatment is not performed after each grinding to eliminate it, then after the outer ring 1 stress fractures to become outer ring A1.1 and outer ring B1.2, the new stress generated after the grinding process will cause the re-balancing of the stress in the outer ring A1.1 and outer ring B1.2, and the re-balancing of the stress in the outer ring A1.1 and outer ring B1.2 will cause the outer ring A1.1 and outer ring B1.2 to deform, thereby causing the outer ring A1.1 and outer ring B1.2 to have dimensional tolerance problems after stress fracture; stable heat treatment is performed after each grinding process, which can solve the above problems; In addition, before the outer ring 1 is separated along the outer ring stress fracture groove 1.3, the wire cutting process of S5 to cut the pre-crack groove is the third technical core of the double-row roller bearing ring stress fracture process; the original separation process of the outer ring 1 is: after the outer ring 1 is ground, the outer ring A1.1 and the outer ring B1.2 are separated by wire cutting. The outer ring stress fracture groove 1.3 set on the outer ring 1 was originally the outer ring 1 wire cutting groove, the purpose is to reduce the wire cutting workload, reduce the wire cutting time, and improve production efficiency; but when the outer ring 1 is separated by wire cutting, sometimes the outer ring 1 is naturally separated into the outer ring A1.1 and the outer ring B1.2 before the wire cutting is completed. Therefore, there is a large step difference on the separation surface, which needs to be eliminated by grinding the separation surface; therefore, the original wire cutting separation process has Three problems: 1. Due to the processing error of the separation surface grinding, there is a verticality error between the separation surface and the axis. After the double-row roller bearing is assembled, there is an overall uneven gap between the separation surfaces of the outer ring A1.1 and the outer ring B1.2, which also affects the working reliability and life of the double-row roller bearing; 2. The separation of the outer ring 1 requires wire cutting and grinding, and the total processing cycle is long and the cost is high; 3. Part of the material needs to be removed from the separation surfaces of the outer ring A1.1 and the outer ring B1.2, resulting in the outer lock column 1.4 being elliptical after processing, and the interference fit between the outer lock column 1.4 and the lock ring is reduced, and the outer ring A1.1 and the outer ring B1.2 cannot be completely locked, and the outer lock column 1.4 is easy to fall off during transportation; In order to solve the above problems, it was later changed to knock the outer ring 1 along the outer After the separation process of the outer ring stress fracture groove 1.3 was adopted, the above three problems were solved; but after the separation process was changed to the copper rod knocking separation process, in order to prevent the copper rod from knocking the outer ring 1 too hard and causing other defects, it was necessary to use a smaller force for a long time to knock (the knocking force was not easy to master and completely depended on the work experience of the operator). Therefore, the separation time of the outer ring 1 was long, and the knocking separation time could not be determined; later, inspired by the phenomenon that in the original wire cutting separation process, the outer ring 1 was naturally separated into outer ring A1.1 and outer ring B1.2 before the wire cutting was completed, a pre-crack groove was machined by wire cutting before the outer ring 1 was separated, and the depth of the pre-crack groove was controlled to 6mm. Then, the blade of a flat shovel was placed at the pre-crack groove, and the flat shovel was lightly tapped with a hammer to make the outer ring 1 develop along the outer ring stress fracture groove 1.3. The outer rings A1.1 and B1.2 are separated by the pre-crack groove, which solves the problem that the separation of the outer ring 1 during the copper rod tapping separation process is completely dependent on the work experience of the operator, takes a long time, and the tapping separation time cannot be determined; the pre-crack groove separation process is processed by wire cutting. Although there is a local gap at the separation surface of the outer ring A1.1 and the outer ring B1.2 after the double-row roller bearing is assembled, the pre-crack groove depth is shallow (the length is also short), and the pre-crack groove length accounts for a small proportion of the separation surface of the outer ring A1.1 and the outer ring B1.2. In addition, the outer ring A1.1 and the outer ring B1.2 will be completely fitted at the stress fracture surface after assembly, so it does not affect the working reliability and service life of the double-row roller bearing at all; at the same time, after the outer ring 1 adopts the pre-crack groove separation process, the outer ring A1.1. No material is removed from the stress fracture surface of the outer ring B1.2, so the diameter of the outer lock column 1.4 will not be affected at all after assembly, ensuring the assembly interference between the outer lock column 1.4 and the lock ring 4, thus solving the problem of the outer lock column 1.4 easily falling off during transportation.

[0019] In this embodiment, the outer ring 1 is subjected to two grinding processes of initial grinding and fine grinding; actually, according to the dimensional accuracy requirements and surface roughness requirements of the outer ring 1, three grinding processes of initial grinding, fine grinding and final grinding can also be set; after the third final grinding, the stable heat treatment temperature is reduced by about 10°C compared with the stable heat treatment temperature after fine grinding, and the insulation time is shortened by about 2 hours.

[0020] See the instruction manual Figure 5 : When assembling a double-row roller bearing, first assemble the roller 3 with the inner ring 2 through the cage; then select and pair the outer rings according to the pairing numbers on the outer rings A1.1 and B1.2; assemble the selected outer ring A1.1 on the outside of the left roller 3, then set the inner ring 2 on the assembly fixture shaft 5, and set the selected outer ring B1.2 on the outside of the right roller 3. At this time, the outer rings A1.1 and B1.2 remain separated; rotate the outer ring B1.2 so that the outer ring A1.1 Align the assembly reference lines of outer rings 1.1 and B1.2, push outer ring B1.2 to the left, so that the fracture surfaces of outer rings A1.1 and B1.2 fit completely together; rotate outer rings A1.1 and B1.2 at the same time, so that one of the outer lock pins 1.4 is placed on the uppermost side, and use a tool to assemble the lock ring 4 on the outer lock pin 1.4; use the same method to complete the installation of the remaining five lock rings 4, and finally fix the outer ring A1.1 and the outer ring B1.2 together to complete the assembly of the double-row roller bearing.

[0021] Example 2, see the attached specification Figure 6 , 7 , 8: See the instruction manual Figure 6 , 7, shows another double-row roller bearing structure; in the double-row roller bearing structure of this embodiment, the inner ring 2 includes a split inner ring A2.1 and an inner ring B2.2; the inner circumferential surfaces of the split inner rings A2.1 and B2.2 are correspondingly processed with six inner locking pins 2.4, and the inner locking pins 2.4 of the inner rings A2.1 and B2.2 are fixedly provided with locking rings 4, and the outer circumferential surfaces of the inner locking pins 2.4 are interference-fitted with the inner holes of the locking rings 4, so that the inner rings A2.1 and B2 .2 Fixed connection to prevent the inner ring A2.1 and inner ring B2.2 of the double-row roller bearing from being separated during transportation; the inner ring A2.1 and inner ring B2.2 are integral structures during the processing. After the processing is completed, they are broken into two separate inner rings A2.1 and B2.2 through the pre-set inner ring stress fracture groove 2.3, thereby ensuring that the inner diameters and raceway diameters of the inner rings A2.1 and B2.2 are the same; The specific processing technology of the split paired inner ring A2.1 and inner ring B2.2 is basically the same as that in the first embodiment, the difference is that: in the fine grinding process of S43, after fine grinding the end faces on both sides, the ribs, the inner circle, and the raceway, and sanding the non-ground surfaces, there is no need to grind the inner circle or the raceway; in addition, in this embodiment, the inner lock column 2.4 is obtained by electrospark machining.

[0022] In this embodiment, the double-row roller bearing is assembled using a V-groove assembly tool 6 .

[0023] Parts of the present invention not described in detail are prior art.

Claims

1. A double-row roller bearing ring stress fracture processing technology, used for processing double-row roller bearing rings; the double-row roller bearing comprises an outer ring (1), an inner ring (2), and rollers (3); a plurality of rollers (3) are rollingly arranged between the raceways of the outer ring (1) and the inner ring (2); the characteristics are: The outer ring (1) includes an outer ring A (1.1) and an outer ring B (1.2), and a stress fracture groove is provided between the outer ring A (1.1) and the outer ring B (1.2); the outer ring A (1.1) and the outer ring B (1.2) are integral structures during the turning, heat treatment and grinding processes; after the outer ring A (1.1) and the outer ring B (1.2) are ground, they are fractured along the stress fracture groove by external force, so that the outer ring A (1.1) and the outer ring B (1.2) become separate structures.

2. The double-row roller bearing ring stress fracture processing technology according to claim 1 is characterized by: The inner ring (2) includes an inner ring A (2.1) and an inner ring B (2.2); a stress fracture groove is provided between the inner ring A (2.1) and the inner ring B (2.2); the inner ring A (2.1) and the inner ring B (2.2) are integral structures during the turning, heat treatment and grinding processes; after the inner ring A (2.1) and the inner ring B (2.2) are ground, they are fractured along the stress fracture groove by external force, so that the inner ring A (2.1) and the inner ring B (2.2) become separate structures.

3. The double-row roller bearing ring stress fracture processing technology according to claim 1 or 2 is characterized in that: During turning, corresponding stress fracture grooves are machined on the inner and outer diameters of the ring. The stress fracture grooves are sharp-angled V-shaped grooves with an angle between 50-70°. The bottom thickness of the cross section corresponding to the sharp corners of the two stress fracture grooves is 0.8-1.0mm. During the grinding process, the stress fracture grooves are turned and trimmed for the second time. After the second turning and trimming, the bottom thickness of the cross section corresponding to the sharp corners of the two stress fracture grooves is 0.5-0.7mm.

4. The double-row roller bearing ring stress fracture processing technology according to claim 1 or 2 is characterized by: The grinding process of the outer ring (1) and the inner ring (2) includes several grinding process steps, and a stabilization heat treatment is performed after each grinding process.

5. The double-row roller bearing ring stress fracture processing technology according to claim 1 or 2 is characterized in that: Before the outer ring (1) or the inner ring (2) is separated along the stress fracture groove, a pre-crack groove is machined on the stress fracture groove by wire cutting, and the depth of the pre-crack groove is 5-7 mm below the tip of the stress fracture groove.

6. The double-row roller bearing ring stress fracture processing technology according to claim 1 or 2, characterized in that: Before the outer ring (1) or the inner ring (2) is separated along the stress rupture groove, a pairing number and an assembly reference line are machined on the outer ring (1) or the inner ring (2).

7. The double-row roller bearing ring stress fracture processing technology according to claim 1 or 2 is characterized by: After the outer ring (1) or the inner ring (2) has been separated along the stress rupture groove, it needs to be cleaned.

8. The double-row roller bearing ring stress fracture processing technology according to claim 1 or 2 is characterized by: A plurality of outer locking columns (1.4) are correspondingly arranged between the outer ring A (1.1) and the outer ring B (1.2); or a plurality of inner locking columns (2.4) are correspondingly arranged between the inner ring A (2.1) and the inner ring B (2.2); after the double-row roller bearing is assembled, the outer locking columns (1.4) corresponding to the outer ring A (1.1) and the outer ring B (1.2) are fixedly connected via a locking ring (4); or the inner locking columns (2.4) corresponding to the inner ring A (2.1) and the inner ring B (2.2) are fixedly connected via a locking ring (4).

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