Machining method for rolling bearing with ring precisely shaped by hard finishing

A technology of rolling bearing and processing method, which is applied to rolling contact bearings, rotating bearings, bearings, etc., can solve the problems of insufficient environmental protection ring shape and performance, difficult to guarantee sealing accuracy, and high cost

Active Publication Date: 2014-04-23
SHANGHAI F&S BEARING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The purpose of the present invention is to provide a method for manufacturing rolling bearings with rings formed by precision hard turning, to overcome the cumbersome and complicated manufacturing process of the existing bearings, the high cost, not being environmentally friendly and the shape and performance of the main working surface of the rings cannot be obtained from the principle For the problem of good guarantee, develop anti-fatigue and green molding methods for bearing rings
Another object of the present invention is to provide a rolling bearing product suitable for the overall precision hard turning of the ring or part of the precision hard turning forming, so as to overcome the design shape of the bearing raceway that exists in the current rolling bearing rings that are formed by grinding and super-precision Limited, difficult to guarantee the sealing accuracy, the shape and performance of the bearing raceway can not be well controlled, thus hindering the further improvement of the bearing operating reliability and the further extending of the operating life

Method used

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  • Machining method for rolling bearing with ring precisely shaped by hard finishing
  • Machining method for rolling bearing with ring precisely shaped by hard finishing
  • Machining method for rolling bearing with ring precisely shaped by hard finishing

Examples

Experimental program
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Effect test

Embodiment 1

[0118] Embodiment 1. A method for processing rolling bearing formed by integral precision hard turning of ring, such as Figure 11-13 , The rolling bearing is a single-row sealed four-point contact ball bearing, including inner and outer rings 112, 111, rolling elements 113 embedded between the outer ring raceway and the inner ring raceway, retainer 114, grease 115 and seals 116, including the following steps:

[0119] 1) Ferrule processing, including the following operations:

[0120] ① Prepare semi-finished inner and outer rings 112 and 111 with processing allowance,

[0121] ②Quenching and tempering heat treatment for the inner and outer rings 112 and 111 of the semi-finished products with processing allowance,

[0122] ③The heat-treated inner and outer rings 112 and 111 are respectively subjected to overall precision hard car forming,

[0123] 2) The bearing assembly is assembled, and the inner ring 112, the outer ring 111 and the finished rolling element 113 after the integral pre...

Embodiment 2

[0132] Embodiment 2. A method for processing rolling bearings formed by integral precision hard turning of rings, such as Figure 14-16 The rolling bearing is a single-row logarithmic convex raceway cylindrical roller bearing, including inner and outer rings 142, 141, rolling elements 143 embedded between the outer ring raceway and the inner ring raceway, and a retainer 144, including the following step:

[0133] 1) Ferrule processing, including the following operations:

[0134] ① Prepare semi-finished inner and outer rings 142 and 141 with processing allowance,

[0135] ②Quenching and tempering the semi-finished inner and outer rings 142 and 141 with processing allowance,

[0136] ③The heat-treated inner and outer rings 142 and 141 are respectively subjected to overall precision hard car forming,

[0137] 2) The bearing assembly is assembled, and the inner ring 142, the outer ring 141 and the finished cylindrical roller 143 after the integral precision hard car forming in step 1) ③ a...

Embodiment 3

[0144] Embodiment 3. A method for processing rolling bearings formed by integral precision hard turning of rings, such as Figure 17-20 , The rolling bearing is a row of balls and one row of sealed roller bearings, including an outer ring 171, an inner ring (core shaft) 172, balls 173 embedded between the groove raceways of the inner and outer rings, and the inner and outer rings are not groove-shaped. The cylindrical roller 174, the ball retainer 175, the roller retainer 176, the grease 177 and the seal 178 between the raceways include the following steps:

[0145] 1) Ferrule processing, including the following operations:

[0146] ① Prepare semi-finished inner and outer rings 172 and 171 with processing allowance,

[0147] ②Quenching and tempering the semi-finished inner and outer rings 172 and 171 with processing allowance,

[0148] ③Put the heat-treated inner and outer rings 172 and 171 respectively into overall precision hard car forming,

[0149] 2) Assemble the bearing assembly...

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Abstract

Disclosed is a machining method for a rolling bearing with a ring precisely shaped by hard finishing. The machining method is characterized in that an inner ring and an outer ring of the bearing are integrally precisely shaped by hard finishing or the key surface of a ring part is precisely shaped by hard finishing; the key surface comprises raceways, raceway flanges, raceway oil grooves, seal grooves, ring flanges, grooved raceway edge chamfers and the like; precise shaping by hard finishing takes the place of grinding (such as the raceways) shaping and shaping by soft finishing (such as the sealing grooves), so that technical and quality problems of limited shape design of a raceway section, grinding badness even burn injuries and the like are solved; the technical and quality problems of low machining precision, heat treatment distortion and the like existing in shaping surfaces of the sealing grooves, the grooved raceway edge chamfers and the like by soft finishing are solved by precise hard finishing, so that the surfaces of the ring can be designed according to the operating condition and can be shaped precisely in a quite high mode, and the key surface of the ring can be controlled in shape and performance, and designing and manufacturing of the high-performance rolling bearing high in sealability and reliability and the like are of great practical engineering significance.

Description

Technical field [0001] The invention relates to the technical field of rolling bearings, in particular to a method for processing rolling bearings formed by precision hard turning of ferrules. Background technique [0002] As the main engine develops towards high-speed, heavy-duty, green, and high reliability, higher and higher requirements are placed on rolling bearings, especially for higher operating reliability and longer operating life. [0003] Theory and practice have proved that the key factors affecting the reliability and life of the bearing are divided into two major aspects. The first is the sealing accuracy and reliability. The sealing accuracy is not high and unreliable. The result is that the grease in the bearing flows into the bearing. External leakage and the intrusion of various foreign objects from the bearing into the bearing cause lubrication failure, seal failure, and wear failure. Compared with the classic fatigue spalling failure, these failures are tribolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B1/00B23B5/00F16C19/00
CPCB23B1/00B23B5/00F16C19/00
Inventor 赵联春赵思澄陈淑英
Owner SHANGHAI F&S BEARING TECH
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