A method for processing and manufacturing a flanged special-shaped bearing ring

Abstract

The application discloses a processing and manufacturing method of a special-shaped bearing ring with a flange, which comprises a special-shaped bearing ring, a raceway diameter measuring mechanism and an auxiliary tool, the special-shaped bearing ring comprises a small outer circle, one side of the small outer circle is connected with a flange end face, an outer wall of the flange end face is provided with a large outer circle, a circular-arc-shaped shoulder is arranged at the connecting position of the flange end face and the small outer circle, a circular-arc-shaped groove and a U-shaped groove are arranged at the bottom of the flange end face at the same time, the circular-arc-shaped groove extends to the small outer circle, and the inner wall of the small outer circle is surrounded with a raceway; the method comprises the following specific steps: S1, turning: turning the approximate shape of the bearing; S2, soft grinding of double end faces; S3, soft grinding of the outer circle; and S4, turning of a large hole; the processing and manufacturing method of the special-shaped bearing ring with the flange has the effects of improving the bearing design and the processing flow, and can simultaneously achieve the effects of enhancing the bearing strength and guaranteeing the processing precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing processing, in particular to a processing and manufacturing method of a flange-shaped special-shaped bearing ring. BACKGROUND

[0002] Flange bearing is a special designed bearing, which is characterized by having a flange on the outer ring. This design not only enhances the structural strength of the bearing, but also facilitates installation and positioning. Due to the effect of the flange, the bearing can withstand large axial, radial load and torque, and can be widely used in high load and high speed running mechanical equipment.

[0003] In the field of aerospace, special-shaped bearings need to meet the harsh conditions of lightweight, high temperature resistance, high strength, etc. In addition to the field of aerospace, special-shaped bearings are also widely used in other industrial fields that require high precision and special structure, such as precision machinery, medical devices, automobile manufacturing, etc. The difficulty of design and processing lies in the following aspects:

[0004] 1. High precision requirement: Special-shaped bearings, especially those with flanges and other special structures, have very high requirements on size, shape and position tolerances, and position. Due to the reasons of structural special shape and heat treatment deformation, it is difficult for traditional processing technology to ensure the processing precision at the same time.

[0005] 2. Machining reference problem: For special-shaped bearings, due to their special external structure, they cannot be machined by using the ordinary method of taking the end face and outer diameter as the machining reference. Therefore, special machining process and machining tooling must be designed to solve this problem.

[0006] 3. Structural complexity: Special-shaped bearings contain installation and positioning structures perpendicular to the outer cylindrical surface of the outer ring, pin holes and other special design elements, which increase the complexity and processing difficulty of the bearing.

[0007] Therefore, we are committed to developing a special-shaped bearing ring and solving the problem of slotting machining. SUMMARY

[0008] The present application discloses a processing and manufacturing method of a flange-shaped special-shaped bearing ring, which aims to solve the technical problems of developing a special-shaped bearing ring and solving the problem of slotting machining.

[0009] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0010] The application discloses a processing and manufacturing method of a flange-shaped special-shaped bearing ring, and belongs to the technical field of bearing manufacturing.

[0011] The method comprises the following specific steps:

[0012] S1, turning: turning the approximate shape of the bearing;

[0013] S2, soft grinding of double end faces: soft grinding of the double end faces is performed by using soft abrasives;

[0014] S3, soft grinding of an outer circle: soft grinding of the outer circle is performed by using soft abrasives;

[0015] S4, turning of a large hole;

[0016] S5, turning of an inner and outer corner;

[0017] S6, turning of a small outer circle and a base surface;

[0018] S7, turning of a small outer corner;

[0019] S8, turning of a circular-arc shoulder: turning of a circular-arc shoulder is performed;

[0020] S9, heat treatment;

[0021] S10, lapping of two end faces;

[0022] S11, coarse grinding of a large outer circle;

[0023] S12, coarse grinding of a small outer circle and a base surface;

[0024] S13, fine grinding of a small outer circle and a base surface;

[0025] S14, grinding of a hole;

[0026] S15, coarse grinding of a raceway: coarse grinding of the inner wall of the raceway is performed by using coarse abrasives;

[0027] S16, fine grinding of a raceway: fine grinding of the inner wall of the raceway is performed by using fine abrasives;

[0028] S17, fine grinding of a raceway: fine grinding of the inner wall of the raceway is performed by using finer abrasives;

[0029] S18, fine grinding of a small outer circle and a base surface: the small outer circle and the base surface are simultaneously ground by using a profiled grinding wheel, and the chamfer of the grinding wheel is the same as the radius of the circular-arc shoulder;

[0030] S19: Insert auxiliary fixture: Place the ring on the auxiliary fixture;

[0031] S20: Grinding U-groove: To process the U-groove, adjust the angle of the grinding wheel to be perpendicular to the workpiece, and dress the diameter of the grinding wheel to be the same as the diameter of the U-groove. Grind by feeding left and right to complete the processing of the U-groove. During processing, a square groove is opened on the base plate to prevent the grinding wheel from interfering with the workpiece.

[0032] S21: Grinding arc grooves: To process arc grooves, adjust the angle of the grinding wheel to be parallel to the workpiece, feed left and right to grind, dress the diameter of the grinding wheel to be the same as the diameter of the arc, feed left and right to grind, and complete the processing of the arc surface.

[0033] S22: Grinding the large outer diameter: Using special tooling and centerless grinding, the large outer diameter is ground.

[0034] S23: Tempering;

[0035] S24: Fine grinding groove: Grinding the inner wall of the raceway using finer abrasives.

[0036] To prevent burrs from forming at the connection between the flange end face and the small outer circle during grinding, a square shoulder is normally machined for the flange bearing, as shown in the figure. However, since this bearing has U-shaped grooves and arc-shaped grooves, machining the shoulder can cause the flange to deform or even break due to insufficient strength. Therefore, to increase the bearing strength, the square shoulder is designed as an arc-shaped shoulder to avoid breakage at the connection between the flange end face and the small outer circle. However, because the current structure is an arc-shaped shoulder, burrs will be generated if the small outer circle and the base surface are rough ground in two separate passes. Therefore, an improvement is made. The improved design uses a shaped grinding wheel with the same chamfer radius as the arc-shaped shoulder. This allows for simultaneous grinding of the small outer circle and the base surface while ensuring grinding accuracy. Thus, by improving both the bearing design and the machining process, the two major effects of enhancing bearing strength and ensuring machining accuracy can be achieved simultaneously.

[0037] In a preferred embodiment, the raceway diameter measuring mechanism includes two measuring claws, and the tops of the two measuring claws are respectively provided with arc-shaped ends, and each arc-shaped end is movably connected to a ball;

[0038] The highest point of the arc end is located inside the small outer circle, and the sphere moves and fits inside the raceway.

[0039] Because the bearing raceway position is close to the bearing bottom surface, the conventional measurement method cannot realize measurement, therefore the measurement tooling is improved, when the improved measurement claw is used for measurement, the measuring head contacts the raceway, the measurement claw needs to protrude the bearing end surface, but the bearing is a semi-closed type, the measurement claw cannot protrude the bearing end surface, therefore the measurement cannot be realized, after the improvement, the circular arc end head is added, the circular arc end head is in a circular arc type, and the highest point is lower than the ball, the problem of interference between the end surface of the measuring head and the bearing bottom surface can be effectively avoided, and the measurement of the roll is realized.

[0040] In a preferred scheme, the auxiliary tooling includes a base, and a top end inner wall of the base is provided with a threaded groove, a plurality of screw holes and an inner hole, the inner hole is located at the center position of the threaded groove, and the plurality of screw holes are located between the threaded groove and the inner hole;

[0041] A threaded extension plate is engaged in the threaded groove, and a top end of the threaded extension plate is fixedly connected with a cover plate, and the plurality of screw holes are simultaneously provided through the cover plate;

[0042] One side of the cover plate is provided with a slot, a bottom end of the cover plate is fixedly connected with a center cylinder, and the center cylinder is located in the inner hole, and a fixing screw is engaged in each screw hole;

[0043] The S19 includes the following specific steps:

[0044] S191: first install the collar in the inner hole of the base, the diameter of the inner hole is matched with the diameter of the small outer circle 1 of the collar;

[0045] S192: install the cover plate in the bearing hole, the diameter of the center cylinder is matched with the inner hole of the collar;

[0046] S193: install three fixing screws in the threaded holes.

[0047] In order to realize the grinding of the U-shaped groove and the circular arc groove, a special tooling needs to be processed, first, install the collar in the inner hole of the base, the diameter of the inner hole is matched with the diameter of the small outer circle of the collar, second, install the cover plate in the bearing hole, the diameter of the center cylinder is matched with the inner hole of the collar, the base is provided with a threaded groove, the threaded extension plate is provided with external threads, the cover plate and the base are fixed to each other by rotating the threads, and the end surface of the bearing is also fixed, third, install three fixing screws in the threaded holes to prevent the cover plate and the base from loosening during processing, the cover plate is provided with a slot, which can avoid interference when the circular arc groove of the collar is processed, and the base is an equilateral triangle, which cooperates with the fixed jaw of the machine tool to effectively prevent the workpiece and the tooling from rotating during grinding.

[0048] The special tooling includes a limiting ring sleeve, the inner diameter of the limiting ring sleeve is the same as the small outer circle, the outer diameter is the same as the large outer circle, and the width is the same as the small outer circle, and the inner wall of the limiting ring sleeve is in interference clamping with the special-shaped bearing collar.

[0049] From the above, a flange-shaped bearing ring processing method, including a special-shaped bearing ring, a raceway diameter measuring mechanism and an auxiliary tool, the special-shaped bearing ring includes a small outer circle, and one side of the small outer circle is connected with a flange end face, the outer wall of the flange end face is provided with a large outer circle, the connection between the flange end face and the small outer circle is provided with a circular-arc-shaped shoulder, the bottom of the flange end face is provided with a circular-arc-shaped groove and a U-shaped groove at the same time, and the circular-arc-shaped groove extends to the small outer circle, and the inner wall of the small outer circle is provided with a raceway; including the following specific steps: S1: turning: turning the approximate shape of the bearing; S2: soft grinding double end face: polishing the double end face with soft abrasive; S3: soft grinding outer circle: polishing the outer circle with soft abrasive; S4: turning large hole; S5: turning inner and outer corners; S6: turning small outer circle and base surface; S7: turning small outer corner; S8: turning circular-arc-shaped shoulder: turning the circular-arc-shaped shoulder; S9: heat treatment; S10: grinding two end faces; S11: coarse grinding large outer circle; S12: coarse grinding small outer circle and base surface; S13: fine grinding small outer circle and base surface; S14: grinding hole; S15: coarse grinding groove: polishing the inner wall of the raceway with coarse abrasive; S16: fine grinding groove: polishing the inner wall of the raceway with fine abrasive; S17: fine grinding groove: polishing the inner wall of the raceway with finer abrasive; S18: small outer circle and base surface grinding: simultaneously grinding the small outer circle and the base surface with a profiled grinding wheel, and the grinding wheel chamfer is the same as the circular-arc-shaped shoulder chamfer radius; S19: placed in auxiliary tool: placing the ring on the auxiliary tool; S20: grinding U-shaped groove: processing the U-shaped groove, the angle of the grinding wheel is adjusted to be perpendicular to the workpiece, the diameter of the grinding wheel is trimmed to be the same as the diameter of the U-shaped groove, and left and right feeding grinding is completed, and the U-shaped groove is processed, when processing, a square groove is opened on the bottom plate to prevent the grinding wheel from interfering with the workpiece; S21: grinding circular-arc-shaped groove: processing the circular-arc-shaped groove, the angle of the grinding wheel is adjusted to be parallel to the workpiece, left and right feeding grinding is carried out, the diameter of the grinding wheel is trimmed to be the same as the diameter of the circular arc, and left and right feeding grinding is carried out to complete the processing of the circular arc surface; S22: large outer circle grinding: using a special tool and adopting a centerless grinding method to grind the large outer circle; S23: tempering; S24: fine grinding groove: grinding the inner wall of the raceway with finer abrasive. The flange-shaped bearing ring processing method provided by the application has the technical effects of enhancing the strength of the bearing and guaranteeing the processing precision through improving the bearing design and improving the processing flow. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 The original special-shaped bearing ring side shoulder schematic diagram of the flange-shaped special-shaped bearing ring processing method proposed by the application.

[0051] Figure 2 The present special-shaped bearing ring structure schematic diagram of the flange-shaped special-shaped bearing ring processing method proposed by the application.

[0052] Figure 3 The side surface shoulder of the special-shaped bearing ring of the flange special-shaped bearing ring machining method is shown in the schematic view.

[0053] Figure 4 The specific flow chart of the flange special-shaped bearing ring machining method is shown in the schematic view.

[0054] Figure 5 The original raceway diameter measurement mechanism structure of the flange special-shaped bearing ring machining method is shown in the schematic view.

[0055] Figure 6 The present raceway diameter measurement mechanism structure of the flange special-shaped bearing ring machining method is shown in the schematic view.

[0056] Figure 7 The auxiliary tool structure of the flange special-shaped bearing ring machining method is shown in the schematic view.

[0057] Figure 8 The auxiliary tool structure of the flange special-shaped bearing ring machining method is shown in the schematic view.

[0058] Figure 9 The auxiliary tool structure of the flange special-shaped bearing ring machining method is shown in the schematic view.

[0059] Figure 10 The auxiliary tool structure of the flange special-shaped bearing ring machining method is shown in the schematic view.

[0060] In the figure: 1, small outer circle; 2, flange end face; 3, circular arc groove; 4, U-shaped groove; 5, circular arc shoulder; 6, raceway; 7, measurement claw; 8, sphere; 9, circular arc end; 10, fixing screw; 11, cover plate; 12, slot; 13, base; 14, outer thread extension plate; 15, threaded groove; 16, inner hole; 17, screw hole; 18, center cylinder; 19, limit ring sleeve. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments.

[0062] The flange special-shaped bearing ring machining method disclosed by the present application is mainly applied to the scene of special-shaped bearing ring machining.

[0063] Referring toFigures 1-4 The application discloses a flange-shaped special-shaped bearing ring processing method, which comprises a special-shaped bearing ring, a raceway diameter measuring mechanism and an auxiliary tooling, the special-shaped bearing ring comprises a small outer circle 1, one side of the small outer circle 1 is connected with a flange end face 2, the outer wall of the flange end face 2 is provided with a large outer circle, the connecting position of the flange end face 2 and the small outer circle 1 is provided with a circular-arc-shaped shoulder 5, the bottom of the flange end face 2 is simultaneously provided with a circular-arc-shaped groove 3 and a U-shaped groove 4, the circular-arc-shaped groove 3 extends to the small outer circle 1, and the inner wall of the small outer circle 1 is provided with a raceway 6.

[0064] The method comprises the following specific steps:

[0065] S1: turning: turning the approximate shape of the bearing;

[0066] S2: soft grinding of double end faces: soft grinding of the double end faces is performed by using soft abrasives;

[0067] S3: soft grinding of the outer circle: soft grinding of the outer circle is performed by using soft abrasives;

[0068] S4: turning of a large hole;

[0069] S5: turning of an inner and outer corner;

[0070] S6: turning of a small outer circle and a base surface;

[0071] S7: turning of a small outer corner;

[0072] S8: turning of a circular-arc-shaped shoulder: the circular-arc-shaped shoulder 5 is turned out;

[0073] S9: heat treatment;

[0074] S10: lapping of two end faces;

[0075] S11: coarse grinding of a large outer circle;

[0076] S12: coarse grinding of a small outer circle and a base surface;

[0077] S13: fine grinding of a small outer circle and a base surface;

[0078] S14: grinding of a hole;

[0079] S15: coarse grinding of a raceway: coarse grinding of the inner wall of the raceway 6 is performed by using coarse abrasives;

[0080] S16: fine grinding of a raceway: fine grinding of the inner wall of the raceway 6 is performed by using fine abrasives;

[0081] S17: fine grinding of a raceway: fine grinding of the inner wall of the raceway 6 is performed by using finer abrasives;

[0082] S18: fine grinding of a small outer circle and a base surface: the small outer circle 1 and the base surface are simultaneously ground by using a profiled grinding wheel, and the chamfer of the grinding wheel is the same as the chamfer radius of the circular-arc-shaped shoulder 5;

[0083] S19: Put the ring on the auxiliary tool;

[0084] S20: Grind the U-shaped groove: process the U-shaped groove 4, adjust the angle of the grinding wheel to be perpendicular to the workpiece, trim the diameter of the grinding wheel to be the same as the diameter of the U-shaped groove 4, left and right feed grinding, complete the processing of the U-shaped groove, and when processing, a square groove is opened on the bottom plate to prevent the grinding wheel from interfering with the workpiece;

[0085] S21: Grind the circular arc groove: process the circular arc groove 3, adjust the angle of the grinding wheel to be parallel to the workpiece, left and right feed grinding, trim the diameter of the grinding wheel to be the same as the diameter of the circular arc, left and right feed grinding, and complete the processing of the circular arc surface;

[0086] S22: Trim the large outer circle: use a special tool and adopt the method of centerless grinding to trim the large outer circle;

[0087] S23: Annealing;

[0088] S24: Fine grinding: use finer abrasives to grind the inner wall of the raceway 6. In order to prevent burrs from occurring at the junction of the flange end surface 2 and the small outer circle 1 during grinding, the flange bearing normally needs to be processed with a square shoulder, as shown in Figure 1 However, due to the presence of the U-shaped groove 4 and the circular arc groove 3 in this bearing, processing the shoulder may cause the flange to be too weak and deform or even break. Therefore, in order to increase the strength of the bearing, the square shoulder is designed as a circular arc shoulder 5, which can prevent the junction of the flange end surface 2 and the small outer circle 1 from breaking. However, because the current structure is a circular arc shoulder 5, if the small outer circle and the base surface are processed in two passes, burrs will occur. Therefore, improvements are made. After the improvement, a profiled grinding wheel is used, and the chamfer angle of the grinding wheel is the same as the radius of the circular arc shoulder 5. Therefore, the small outer circle and the base surface can be ground simultaneously, and the grinding accuracy is guaranteed. In this way, through the improvement of bearing design and processing flow, the strength of the bearing is increased and the processing accuracy is guaranteed.

[0089] Referring to Figure 6 In a preferred embodiment, the raceway diameter measuring mechanism includes two measuring claws 7, and the top ends of the two measuring claws 7 are respectively provided with circular arc end heads 9, and each circular arc end head 9 is movably connected with a ball 8.

[0090] Referring to Figure 6 In a preferred embodiment, the highest point of the circular arc end head 9 is located in the small outer circle 1, and the ball 8 is movably attached to the raceway 6. Since the distance between the raceway position of this bearing and the bearing bottom surface is relatively close, the conventional measurement method cannot achieve measurement. Figure 5As shown, therefore, the measuring tool is improved, and when the measuring tool is measured by the measuring claw 7 before the improvement, the measuring claw 7 has to protrude the bearing end face when the measuring head contacts the raceway 6, but the bearing is of a semi-closed type, the measuring claw 7 cannot protrude the bearing end face, and thus the measurement cannot be realized. After the improvement, the circular arc end head 9 is added, the circular arc end head 9 is in a circular arc type, and the highest point is lower than the sphere 8, which can effectively avoid the problem of interference between the measuring head end face and the bearing bottom face, and realize the measurement of the raceway 6.

[0091] With reference to Figure 7 and Figure 8 In a preferred embodiment, the auxiliary tool comprises a base 13, and the inner wall of the top end of the base 13 is provided with a threaded groove 15, a plurality of screw holes 17 and an inner hole 16, the inner hole 16 is located at the center position of the threaded groove 15, and the plurality of screw holes 17 are located between the threaded groove 15 and the inner hole 16.

[0092] With reference to Figure 7 and Figure 8 In a preferred embodiment, the threaded groove 15 is engaged with an externally threaded extension plate 14, and the top end of the externally threaded extension plate 14 is fixedly connected with a cover plate 11, and the plurality of screw holes 17 are simultaneously provided on the cover plate 11.

[0093] With reference to Figure 7 and Figure 8 In a preferred embodiment, one side of the cover plate 11 is provided with a slot 12, the bottom end of the cover plate 11 is fixedly connected with a center cylinder 18, and the center cylinder 18 is located in the inner hole 16, and each screw hole 17 is engaged with a fixed screw 10 respectively.

[0094] With reference to Figure 7 and Figure 8 In a preferred embodiment, S19 comprises the following specific steps:

[0095] S191: first install the sleeve ring in the inner hole 16 of the base 13, and the diameter of the inner hole 16 is matched with the diameter of the small outer circle 1 of the sleeve ring;

[0096] S192: install the cover plate 11 in the bearing hole, and the diameter of the center cylinder 18 is matched with the inner hole of the sleeve ring;

[0097] S193: install three fixed screws 10 in threaded holes 17, to achieve grinding U-shaped groove 4 and circular arc groove 3, a special tool needs to be processed, the first step is to install the ring in the inner hole 16 of the base 13, the diameter of the inner hole 16 is matched with the diameter of the small outer circle 1, the outer diameter is the same as the large outer circle, and the width is the same as the small outer circle 1, the second step is to install the cover plate 11 in the bearing hole, the diameter of the center cylinder 18 is matched with the inner hole of the ring, the base is provided with a threaded groove 15, and the outer thread extension plate 14 is provided with an outer thread, the cover plate 11 and the base 13 are fixed to each other by rotating the threaded way, and the function of fixing the bearing end surface is realized, the third step is to install three fixed screws 10 in threaded holes 17, to prevent the cover plate 11 and the base 13 from loosening during processing, wherein the cover plate 11 is provided with a slot, which can avoid interference when grinding the circular arc groove 3 of the ring, and the base 13 is an equilateral triangle, which cooperates with the fixed jaw of the machine tool, and can effectively prevent the workpiece and the tool from rotating and colliding during grinding.

[0098] Referring to Figure 9 and Figure 10 In a preferred embodiment, the special tool includes a limiting ring sleeve 19, the inner diameter of the limiting ring sleeve 19 is the same as the small outer circle 1, the outer diameter is the same as the large outer circle, and the width is the same as the small outer circle 1, the inner wall of the limiting ring sleeve 19 is clamped with the special-shaped bearing ring, there is a circular arc surface and a U-shaped groove 4 on the large outer circle, so the outer circle is not complete, in the conventional grinding mode, the grinding wheel and the guide wheel have extrusion force on the outer ring, the edge of the groove will directly collide with the grinding wheel, causing scrap, therefore, a special tool needs to be added on the small outer circle 1, the inner diameter of the tool is the same as the small outer circle 1, the outer diameter is the same as the large outer circle, and the width is the same as the small outer circle 1, the cutting force during grinding can be evenly distributed on the flange outer circle and the tool outer circle surface, without collision phenomenon, the outer diameter of the auxiliary tool is the same as the outer diameter of the flange before grinding, and the inner hole diameter of the tool and the small outer circle outer diameter of the ring are divided into several grades and transitionally matched, to prevent the ring and the tool from sliding with each other, by using the improved process and tooling, the roundness of the raceway of the special-shaped flange ring can be guaranteed within 0.8μm, the roughness is within 0.032μm, and the cylindricity of the outer circle is within 1.5μm.

[0099] Working principle: in order to prevent burrs from being generated at the connection between the flange end surface 2 and the small outer circle 1 during grinding, the flange bearing needs to be processed with a square shoulder under normal circumstances, such as Figure 1The flange strength is too low and deformed or even broken when the blade shoulder is machined due to the U-shaped groove 4 and the circular-arc-shaped groove 3 of the bearing, so the square blade shoulder is designed as a circular-arc-shaped blade shoulder 5 to increase the strength of the bearing, so as to avoid the breakage of the connecting part between the flange end surface 2 and the small outer circle 1, but because the structure is a circular-arc-shaped blade shoulder 5, burrs will be generated if the small outer circle and the base surface are machined in two passes, so the forming grinding wheel is used after improvement, the chamfer angle of the grinding wheel is the same as the radius of the circular-arc-shaped blade shoulder 5, so the small outer circle and the base surface can be ground at the same time, and the grinding precision is ensured. Thus, through the improvement of the bearing design and the improvement of the machining process, the two effects of strengthening the bearing strength and ensuring the machining precision can be achieved at the same time. In order to grind the U-shaped groove 4 and the circular-arc-shaped groove 3, a special tooling is needed. First, the ring is installed in the inner hole 16 of the base 13, the diameter of the inner hole 16 is matched with the diameter of the small outer circle 1 of the ring, second, the cover plate 11 is installed in the bearing hole, the diameter of the center cylinder 18 is matched with the inner hole of the ring, the base is provided with a threaded groove 15, the outer thread extension plate 14 is provided with an outer thread, the cover plate 11 and the base 13 are fixed to each other by rotating the thread, which also fixes the end surface of the bearing, third, the three fixing screws 10 are installed in the threaded holes 17 to prevent the cover plate 11 and the base 13 from loosening during machining. The cover plate 11 is provided with a slot to avoid interference when machining the circular-arc-shaped groove 3 of the ring. The base 13 is an equilateral triangle, which cooperates with the fixed jaw of the machine tool to effectively prevent the workpiece and the tooling from rotating during grinding. Because the circular-arc-shaped groove 3 and the U-shaped groove 4 require a 90° angle, a mechanism is designed to ensure the angle. After the cover plate 11 is slotted, a positioning pin hole is punched at the 90° position. The diameter of the positioning pin hole and the positioning pin is the same as the diameter of the U-shaped groove 4. After the U-shaped groove 4 is machined, the position of the U-shaped groove 4 is aligned with the positioning pin hole. After the cover plate 11 contacts with the outer ring, the cover plate 11 and the outer ring are connected by installing the positioning pin, which also fixes the position of the outer ring. After fixing, the position to be machined is at 90° with the U-shaped groove 4. The roughness of the circular-arc surface and the U-shaped groove 4 machined in this way can reach 0.25μm, and the curvature tolerance can be within 0.02mm. If the circular-arc surface and the U-shaped groove 4 are turned directly, the precision cannot reach the precision of grinding, which is only the precision and tolerance of turning. If the groove is turned first, the structure strength is low, which is prone to deformation during heat treatment and difficult to position during grinding, causing the problem of being unable to machine. After the groove is machined, the edge of the groove will have grinding burrs, and the flange will be deformed by grinding, so the small outer circle and the large outer circle need to be re-grounded. The small outer circle is ground by a forming grinding wheel.

[0100] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A method for machining a flanged special-shaped bearing ring, comprising a special-shaped bearing ring, a raceway diameter measuring mechanism and an auxiliary tooling, characterized in that, The special-shaped bearing ring comprises a small outer circle (1), one side of the small outer circle (1) is connected with a flange end face (2), the outer wall of the flange end face (2) is provided with a large outer circle, the connecting position of the flange end face (2) and the small outer circle (1) is provided with a circular-arc-shaped shoulder (5), the bottom of the flange end face (2) is simultaneously provided with a circular-arc-shaped groove (3) and a U-shaped groove (4), and the circular-arc-shaped groove (3) extends to the small outer circle (1), the inner wall of the small outer circle (1) is surrounded by a raceway (6); The method comprises the following specific steps: S1: turning: turning the approximate shape of the bearing; S2: soft grinding of the double end faces: polishing the double end faces by using soft abrasive; S3: soft grinding of the outer circle: polishing the outer circle by using soft abrasive; S4: turning of the large hole; S5: turning of the inner and outer corners; S6: turning of the small outer circle and the base surface; S7: turning of the small outer circle corner; S8: turning of the circular-arc-shaped shoulder: turning the circular-arc-shaped shoulder (5); S9: heat treatment; S10: lapping of the two end faces; S11: coarse grinding of the large outer circle; S12: coarse grinding of the small outer circle and the base surface; S13: fine grinding of the small outer circle and the base surface; S14: grinding of the hole; S15: coarse grinding of the raceway: polishing the inner wall of the raceway (6) by using coarse abrasive; S16: fine grinding of the raceway: polishing the inner wall of the raceway (6) by using fine abrasive; S17: fine grinding of the raceway: polishing the inner wall of the raceway (6) by using finer abrasive; S18: fine grinding of the small outer circle and the base surface: simultaneously grinding the small outer circle (1) and the base surface by using a profiled grinding wheel, and the chamfer angle of the grinding wheel is the same as the chamfer radius of the circular-arc-shaped shoulder (5); S19: placing in an auxiliary tool: placing the ring on the auxiliary tool; S20: grinding of the U-shaped groove: processing the U-shaped groove (4), the angle of the grinding wheel is adjusted to be perpendicular to the workpiece, the diameter of the grinding wheel is trimmed to be the same as the diameter of the U-shaped groove (4), and left and right feeding grinding is performed to complete the processing of the U-shaped groove, and a square groove is opened on the base plate during the processing to prevent the interference between the grinding wheel and the workpiece; S21: grinding of the circular-arc-shaped groove: processing the circular-arc-shaped groove (3), the angle of the grinding wheel is adjusted to be parallel to the workpiece, left and right feeding grinding is performed, the diameter of the grinding wheel is trimmed to be the same as the diameter of the circular arc, and left and right feeding grinding is performed to complete the processing of the circular arc surface; S22: fine grinding of the large outer circle: using a special tool and adopting the centerless grinding mode to fine grind the large outer circle; S23: tempering; S24: fine lapping of the raceway: lapping the inner wall of the raceway (6) by using finer abrasive.

2. The method of claim 1, wherein the flanged profiled bearing ring is formed by, The raceway diameter measuring mechanism comprises two measuring claws (7), and the top ends of the two measuring claws (7) are respectively provided with circular-arc-shaped end heads (9), and each circular-arc-shaped end head (9) is movably connected with a ball (8).

3. The method of claim 2, wherein the flange is formed by a press process. The highest point of the circular-arc-shaped end head (9) is located in the small outer circle (1), and the ball (8) movably adheres to the raceway (6).

4. The method of claim 1, wherein the flange is formed by a press working process. The auxiliary tool comprises a base (13), and the inner wall of the top end of the base (13) is provided with a threaded groove (15), a plurality of screw holes (17) and an inner hole (16), the inner hole (16) is located at the center position of the threaded groove (15), and the plurality of screw holes (17) are located between the threaded groove (15) and the inner hole (16).

5. The method of claim 4, wherein the flange is formed by a process selected from the group consisting of: stamping, coining, swaging, and a combination thereof. The threaded groove (15) is engaged with an externally threaded extension plate (14), and the top end of the externally threaded extension plate (14) is fixedly connected with a cover plate (11), and a plurality of the threaded holes (17) are provided through the cover plate (11) at the same time.

6. The method of claim 5, wherein the flange is formed by a process selected from the group consisting of: stamping, coining, swaging, and a combination thereof. One side of the cover plate (11) is provided with a slot (12), the bottom end of the cover plate (11) is fixedly connected with a center cylinder (18), and the center cylinder (18) is located in the inner hole (16), and each threaded hole (17) is engaged with a fixed screw (10) respectively.

7. The method of claim 6, wherein the flange is formed by a process selected from the group consisting of: stamping, coining, swaging, and a combination thereof. The S19 comprises the following specific steps: S191: first install the sleeve ring in the inner hole (16) of the base (13), the diameter of the inner hole (16) is matched with the diameter of the small outer circle (1) of the sleeve ring; S192: install the cover plate (11) in the bearing hole, the diameter of the center cylinder (18) is matched with the inner hole of the sleeve ring; S193: install three fixed screws (10) in the threaded holes (17).

8. The method of claim 1, wherein the flanged profiled bearing ring is formed by, The special tool comprises a limiting ring sleeve (19), the inner diameter of the limiting ring sleeve (19) is the same as the small outer circle (1), the outer diameter is the same as the large outer circle, the width is the same as the small outer circle (1), and the inner wall of the limiting ring sleeve (19) is clamped with the interference of the special-shaped bearing sleeve ring.

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