Bearing inner ring with V-shaped narrow oil groove and processing method

A bearing inner ring, narrow technology, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problem of narrow oil grooves and small space for empty tools, achieve high-altitude tool space, and ensure the effect of qualified rate

Active Publication Date: 2020-04-17
AVIC HARBIN BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a bearing inner ring with a V-shaped narrow oil groove and a processing method in order to solve the problem of small empty knife space in the narrow oil groove obtained by the existing processing method

Method used

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  • Bearing inner ring with V-shaped narrow oil groove and processing method
  • Bearing inner ring with V-shaped narrow oil groove and processing method
  • Bearing inner ring with V-shaped narrow oil groove and processing method

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specific Embodiment approach 1

[0036] Specific implementation mode 1: In this embodiment, the bearing inner ring with a V-shaped narrow oil groove is composed of a narrow oil groove and a bearing inner ring, and the narrow oil groove is arranged at the intersection of the rib and the raceway in the bearing inner ring; The cross section of the narrow oil groove is V-shaped, the groove bottom of the narrow oil groove is arc-shaped, the angle between the two side walls of the narrow oil groove is 26°~26.5°, and the centerline of the cross section of the narrow oil groove is in line with the bearing The angle between the raceway planes of the inner ring is 55°.

[0037] The narrow oil groove in this embodiment is V-shaped, and the included angle between the two side walls is 26°-26.5°. Compared with the existing U-shaped, it has a higher empty knife space, which can meet the needs of subsequent raceways, stoppers, etc. Side and other processing needs to ensure the pass rate of products.

specific Embodiment approach 2

[0038] Specific embodiment two: In this embodiment, the method for processing the bearing inner ring with a V-shaped narrow oil groove in this embodiment is carried out according to the following steps:

[0039] (1) Turning of bearing inner ring blanks:

[0040] Firstly, fine-turn surface A, fine-turn inner diameter, chamfer the inner diameter of surface A, and chamfer the outer diameter of surface A; The inner diameter chamfering of the B surface and the outer diameter chamfering of the B surface; the final rough car oil groove;

[0041] (2) Perform heat treatment on the bearing inner ring obtained in step (1); heat treatment can change the internal structure of the bearing to meet the requirements of bearing structure and hardness;

[0042] (3) The inner ring of the bearing obtained in step (2) is subjected to rough grinding of both end surfaces, rough grinding of the outer diameter, rough grinding of the inner diameter, rough grinding of ribs and rough grinding of the race...

specific Embodiment approach 3

[0052] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the processing parameters of the fine turning A surface, fine turning inner diameter, fine turning B surface and fine turning outer diameter of step (1): cutting speed Vc: 160 ~180m / min, feed rate f: 0.15~0.25mm / min, cutting depth ap: 0.5~1.5mm; the A surface and B surface are the two end surfaces of the inner ring of the bearing;

[0053] Processing parameters of the thin car raceway in step (1): cutting speed Vc: 80-100m / min, feed rate f: 0.03-0.05mm / min;

[0054]The processing parameters of the rough car oil groove in step (1): cutting speed Vc: 80-100 m / min, feed rate f: 0.05-0.1 mm / min. Other steps and parameters are the same as in the second embodiment.

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Abstract

A bearing inner ring with a V-shaped narrow oil groove and a processing method relate to a bearing inner ring with a V-shaped narrow oil groove and a processing method. The problem that a dry run space of a narrow oil groove obtained by an existing processing method is small is solved. A section of the narrow oil groove in the bearing inner ring is V-shaped, and an included angle is 26-26.5 degrees. The included angle of a cutting edge in the CBN blade structure in a special turning tool is 26-26.5 degrees, and the method comprises the following steps of lathing a bearing ring blank; performing heat treatment; coarsely grinding and demagnetizing; performing complementary tempering; finally grinding, namely, finely grinding an inner diameter; hard-turning the oil groove, washing with acid and dehydrogenating, buffing and flanging, flanging and finally grinding the inner diameter; finely finishing, performing fluorescent magnetic powder flow detection; coarsely lapping, finely lapping, demagnetizing, cleaning, performing laser typing, and submitting. The V-shaped oil groove disclosed by the invention has higher dry run space, and can meet the subsequent processing demands of roller paths, flanges and the like. The special turning tool and the processing method ensure the qualification rate of products. The processing method disclosed by the is suitable for processing the bearinginner ring.

Description

technical field [0001] The invention relates to a bearing inner ring with a V-shaped narrow oil groove and a processing method thereof. Background technique [0002] There is an oil groove on the inner ring of the cylindrical roller bearing. When the axial width or radial width of the oil groove is less than 1mm, it can be regarded as a narrow oil groove. The traditional turning tool for the narrow oil groove is a parallel tool. figure 1 and figure 2 , the width g of a general parallel tool is 0.4mm, the cutting edge is arc-shaped, and the radius e of the cutting edge is 0.2mm. The cross-section of the narrow oil groove obtained by using the above-mentioned tool is U-shaped. The processing schematic diagram is as follows image 3 As shown, the angle k between the centerline of the cross-section of the oil groove and the groove is 45°, and the U-shaped narrow oil groove has a small empty tool space, which cannot meet the processing requirements of subsequent raceways and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00F16C33/58F16C33/64
CPCB23P15/00F16C33/583F16C33/64
Inventor 金贺王海臣吴玫单秋红秦广亮薛英明闫佳山宋亚楠辛梦
Owner AVIC HARBIN BEARING
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