A machining method for outer ring of bidirectional thrust angular contact bearing

Abstract

The present application relates to the processing of bearing ring, in particular to a kind of processing method of two-way thrust angular contact bearing outer ring, the following process of specific processing process is as follows: soft machining→quenching, tempering→first rough grinding end surface→first hard flange surface→second rough grinding end surface→second hard flange surface→rough grinding flange side end surface→hard inner surface, chamfer→hole and outer type rough machining→additional tempering→fine grinding end surface→fine grinding flange surface→final grinding end surface→final grinding flange surface→final processing inner surface→hole and outer type final processing→final grinding raceway→processing burr, sharp angle→polishing raceway→demagnetization cleaning;The method can solve the problem that raceway cannot be ground by traditional processing mode due to the special structure of outer ring, finally realize the processing of outer type of outer ring also effectively complete the grinding of raceway.

Description

TECHNICAL FIELD

[0001] The application relates to machining of a bearing ring, in particular to a machining method for an outer ring of a bidirectional thrust angular contact bearing, and belongs to the technical field of machining of bearing rings in a combined mode. BACKGROUND

[0002] The outer ring of the bidirectional thrust angular contact ball bearing has a special outer shape structure, specifically, the outer surface is in the shape of a rectangle, a plurality of mounting holes are arranged on the end face, and the inner surface and the inner raceway are in the structure of a circle.

[0003] For the outer ring of the bidirectional thrust angular contact ball bearing with the special structure, a conventional machining method is as follows: the outer surface and the inner surface of the conventional bearing are both in the shape of a circle; when the workpiece is machined by grinding, the workpiece is positioned on the front and rear supports in an electromagnetic centerless clamp by the ground outer surface and one end face, the workpiece end face is tightly adsorbed on the end face of the magnetic pole by the suction force generated by a direct-current electromagnetic coil, and the workpiece has a certain eccentricity e with the workpiece shaft (magnetic pole). When the magnetic pole rotates around the shaft center O, the magnetic pole forces the workpiece to rotate around the center o' of the workpiece, and because of the eccentricity e, the magnetic pole and the workpiece slide relative to each other.

[0004] However, because the outer surface structure of the outer ring is irregular, the traditional machining method cannot be used for grinding, the inner surface and the raceway cannot be machined by taking the outer surface as a reference, and the alignment cannot be performed. SUMMARY

[0005] In order to solve the technical problems existing in the machining process of the outer ring of the bidirectional thrust angular contact ball bearing, the purpose of the application is to provide a machining method for the outer ring of the combined bidirectional thrust angular contact bearing, which can solve the problem that the traditional machining method cannot be used for grinding the raceway due to the special structure of the outer ring, and finally realize the machining of the outer shape of the outer ring and effectively complete the grinding of the raceway.

[0006] In order to achieve the above purpose, the technical scheme adopted by the application is as follows: a machining method for the outer ring of a bidirectional thrust angular contact bearing, and the specific machining process is as follows:

[0007] soft turning machining -> quenching and tempering -> first rough grinding of the end face -> first hard turning of the flange face -> second rough grinding of the end face -> second hard turning of the flange face -> rough grinding of one side of the flange end face -> hard turning of the inner surface and chamfering -> rough machining of the hole and outer shape -> additional tempering -> fine grinding of the end face -> fine grinding of the flange face -> final grinding of the end face -> final grinding of the flange face -> final machining of the inner surface -> final machining of the hole and outer shape -> final grinding of the raceway -> processing of burrs and sharp corners -> polishing of the raceway -> demagnetization and cleaning;

[0008] Further, in the final grinding of the raceway process, the workpiece is positioned by using a workpiece adsorption tool, and the grinding of the raceway is realized.

[0009] Further, the workpiece adsorption tooling adopts the combination of the Φ200 outer diameter suction cup and the triangular chuck, and the magnetic force is utilized to ensure that the workpiece is adsorbed on the suction cup.

[0010] The triangular chuck selects a triangular manual chuck, and the model is A2439621A-Z.

[0011] Further, the soft car machining designs the workpiece outer circle into a regular circular structure according to the drawing design, and the outer surface of the outer circle is used as a reference to process the inner surface.

[0012] Further, the processing of the hole and the outer type is based on the inner surface, and in order to ensure the processing precision of the hole and the outer type, rough and final processing are performed twice.

[0013] Further, when the hole and the outer type are rough machined, the outer type is machined by wire cutting, and the hole is laser perforated; when the hole and the outer type are finally machined, the wire cutting slow wire and the machining center are used to perform one-time forming machining on the outer type, the hole and the inner surface.

[0014] Further, in the process of final machining of the inner surface, the wire cutting slow wire is used, and the machining precision of the inner surface is Ra: 0.63μmm.

[0015] Further, in the process of final machining of the hole and the outer type, the wire cutting slow wire is used, and the machining precision of the hole is H7, and the outer type machining size requirement is within ±0.05mm.

[0016] Further, in the process of final grinding of the raceway, the inner surface after final machining is used as a reference to align the workpiece, and the workpiece is positioned by the workpiece adsorption tooling, and after the workpiece is aligned, the raceway is machined, and finally the raceway grinding is completed.

[0017] The key point of the scheme of the application is that only the final grinding of the raceway utilizes the suction cup, and the machined inner surface is used as the raceway grinding reference for alignment, and then the grinding of the raceway is realized.

[0018] The beneficial effects of the technical scheme of the application are:

[0019] The problem that the traditional machining method cannot be used to grind the raceway due to the special structure of the outer circle (the special-shaped structure of the outer type of the outer circle cannot be machined based on the outer surface of the outer circle, cannot be aligned, and the raceway cannot be machined) can be solved, and finally the machining of the outer type of the outer circle is realized, and the grinding of the raceway is also effectively completed. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure diagram of the product (outer circle) processed by the application.

[0021] Figure 2 is Figure 1 the side view.

[0022] Figure 3 for Figure 2 BB cross-sectional view.

[0023] In the diagram, 1 is the end face, 2 is the flange face, 3 is the end face of one side of the flange, 4 is the inner surface, 5 is the mounting hole, and 6 is the raceway. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. Example

[0025] Processing such as Figures 1-3 The method for machining the outer ring of a bidirectional thrust angular contact bearing includes the following specific steps: Soft turning → Quenching and tempering → First rough grinding of end face 1 → First hard turning of flange face 2 → Second rough grinding of end face 1 → Second hard turning of flange face 2 → Rough grinding of one side end face of flange 3 → Hard turning of inner surface 4 and chamfering → Rough machining of hole 5 and outer shape → Additional tempering → Fine grinding of end face 1 → Fine grinding of flange face 2 → Final grinding of end face 1 → Final grinding of flange face 2 → Final machining of inner surface 4 → Final machining of hole 5 and outer shape → Final grinding of raceway 6 → Removal of burrs and sharp corners → Polishing of raceway 6 → Demagnetization and cleaning.

[0026] The above-mentioned soft turning process: Design of soft turning drawings before heat treatment of outer ring: The outer ring is designed as a regular circular structure in imitation of conventional bearings, and the inner surface is machined with the outer surface as the reference.

[0027] In the final grinding process of the raceway 6, the workpiece is positioned using a workpiece adsorption fixture to achieve the grinding of the raceway 6.

[0028] Hole 5 and outer shape machining design: To ensure the machining accuracy of hole 5 and outer shape, machining is carried out in two stages: roughing and final machining. The inner surface 4 is used as the reference. During roughing, the outer shape is machined by wire cutting, and the mounting hole 5 is laser-pierced. During final machining, wire cutting and machining center are used to form the outer shape, hole 5 and positioning reference inner surface 4 in one operation.

[0029] In this embodiment, during the final machining of the inner surface 4, wire EDM is used, and the machining accuracy of the inner surface 4 is Ra: 0.63μmm.

[0030] In the final machining process of holes and shapes, wire EDM is used. The machining accuracy grade of hole 5 is H7, and the machining dimensions of the shape are required to be within ±0.05mm.

[0031] Arriving at the final grinding race process, the workpiece is aligned with the inner surface 4 after final machining as the reference and positioned by the workpiece suction tool. After the workpiece is aligned, the race 6 is machined, and the race 6 grinding is finally completed.

[0032] The final grinding race of the application is made by making special tooling, purchasing special suction cup, combining the suction cup with the triangular chuck, placing the outer ring on the suction cup, and using magnetic force to ensure that the outer ring is adsorbed on the suction cup.

[0033] By adopting the above technical scheme, the machining of the outer ring of the bidirectional thrust angular contact ball bearing with the special structure that the outer surface is rectangular, there are multiple mounting holes on the end face, and the inner surface and the race are circular is solved.

Claims

1. A method of machining a two-directional thrust angular contact bearing outer ring, characterized in that, The process of the specific machining process is as follows: Soft turning machining → quenching and tempering → first rough grinding of end face → first hard turning of flange face → second rough grinding of end face → second hard turning of flange face → rough grinding of flange side end face → hard turning of inner surface and chamfering → rough machining of hole and outer shape → additional tempering → fine grinding of end face → fine grinding of flange face → final grinding of end face → final grinding of flange face → final machining of inner surface → final machining of hole and outer shape → final grinding of raceway → processing of burrs and sharp corners → polishing of raceway → demagnetization and cleaning; In the final grinding of raceway process, the workpiece is positioned by using a workpiece adsorption tooling; The soft turning machining is designed according to the drawing, and the outer circle of the workpiece is designed as a regular circular structure, and the outer surface of the outer circle is used as a reference to machine the inner surface; The machining of the hole and the outer shape is performed twice, i.e. rough machining and final machining, and the inner surface is used as a reference; When the hole and the outer shape are rough machined, the outer shape is machined by using wire cutting; when the hole and the outer shape are finally machined, the wire cutting slow wire is used for machining.

2. The method of claim 1, wherein: The workpiece adsorption tooling is combined with an outer diameter of Φ200 suction cup and a triangular chuck.

3. The method of claim 1, wherein: When the hole and the outer shape are rough machined, the installation hole is laser perforated; when the hole and the outer shape are finally machined, the machining center is used to perform one-time forming machining on the outer shape, the hole and the inner surface.

Images