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Production process of steel ball of racing car generator bearing

A technology of generator bearings and production technology, which is applied in the field of steel ball manufacturing, can solve problems such as no entry, and achieve the effect of superior performance of steel balls

Inactive Publication Date: 2014-07-23
TSUBAKI HOOVER TAICANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Automobile racing generator bearings are important components in automobile generators. Under high-speed, high-temperature, and high-load operation, there are strict requirements on the life of bearing components, especially the steel balls in the bearings are crucial to the service life of generators. The current domestic The generator bearings used in automobiles are basically replaced by imports, and the generator bearings used in racing cars have basically not entered this field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: a kind of production process of the bearing steel ball of racing car generator, comprises the following steps:

[0033] (1) Cold heading: stamping the bearing steel wire into a steel ball blank, the stamping amount is 0.15-0.20mm;

[0034] (2) Light grinding: the rough ball after cold heading is processed by a grinder and a cast iron plate, the cast iron plate: nodular cast iron, processing speed: 65rpm, pressure: 1-5Mpa, grinding medium: cutting fluid;

[0035] (3) Heat treatment: Put the polished products into the mesh belt continuous furnace and use nitrogen as the protective atmosphere for heat treatment. First, heat and quench, quenching heating temperature: 850°C, quenching heating time: 70 minutes, quenching medium: fast bright quenching oil , medium temperature: 80°C; quenched steel balls are cooled, and then tempered, tempering temperature: 175°C, holding time: 150 minutes, hardness value 65 HRC;

[0036] (4) Grinding Ⅰ: Process the heat-treated ...

Embodiment 2

[0045] A production process of bearing steel balls for motor racing generators, comprising the following steps:

[0046] (1) Cold heading: stamping the bearing steel wire into a steel ball blank, the stamping amount is 0.15-0.20mm;

[0047] (2) Light grinding: the rough ball after cold heading is processed by a grinder and a cast iron plate, the cast iron plate: nodular cast iron, processing speed: 25rpm, pressure: 1-5Mpa, grinding medium: cutting fluid;

[0048] (3) Heat treatment: Put the polished products into the mesh belt continuous furnace and use nitrogen as the protective atmosphere for heat treatment. First, heat and quench, quenching heating temperature: 840 ° C, quenching heating time: 80 minutes, quenching medium: fast bright quenching oil , medium temperature: 50°C; quenched steel balls are cooled, and then tempered, tempering temperature: 160°C, holding time: 180 minutes, hardness value 63HRC;

[0049] (4) Grinding Ⅰ: Process the heat-treated steel balls with a ...

Embodiment 3

[0058] A production process of bearing steel balls for motor racing generators, comprising the following steps:

[0059] (1) Cold heading: stamping the bearing steel wire into a steel ball blank, the stamping amount is 0.15-0.20mm;

[0060] (2) Light grinding: the rough balls after cold heading are processed by grinding machine and cast iron plate, cast iron plate: nodular cast iron, processing speed: 100rpm, pressure: 1-5Mpa, grinding medium: cutting fluid;

[0061] (3) Heat treatment: Put the polished products into the mesh belt continuous furnace and use nitrogen as the protective atmosphere for heat treatment. First, heat and quench, quenching heating temperature: 860 ° C, quenching heating time: 50 minutes, quenching medium: fast bright quenching oil , medium temperature: 100°C; quenched steel balls are cooled and then tempered, tempering temperature: 200°C, holding time: 120 minutes, hardness value 64 HRC;

[0062] (4) Grinding Ⅰ: Process the heat-treated steel balls wi...

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Abstract

The invention provides a production process of a steel ball of a racing car generator bearing. The production process of the steel ball of the racing car generator bearing comprises the following steps of cold heading, buffing, heat treatment, grinding I, surface reinforcement treatment, grinding II, fine grinding, cleaning, automatic appearance grading and packaging. The service life of the steel ball under the conditions that the optimum stress of the steel ball reaches a high rotation speed is achieved through control over various parameters of several process points of materials, heat treatment, the surface reinforcement process and the grading technology of critical defects of the steel ball, the fatigue life of the produced steel ball is tested, the experiment value L10T of the basic rated life is longer than 1800 hours, the ratio of the experiment value L10T of the basic rated life to the basic rate life L10 is larger than 18, and the reliability degree RE reaches 100 percentage. The service life of the steel ball is longer than the experiment value of the service life of a steel ball produced through a common production and machining process by 3-5 times, and the steel ball meets the requirement for a high rotation speed, high temperature and continuous operation of the racing car generator bearing.

Description

technical field [0001] The invention belongs to the technical field of steel ball production, and in particular relates to a production process of steel balls for bearings of racing car generators. Background technique [0002] Automobile racing generator bearings are important components in automobile generators. Under high-speed, high-temperature, and high-load operation, there are strict requirements on the life of bearing components, especially the steel balls in the bearings are crucial to the service life of generators. The current domestic The generator bearings for automobiles are basically replaced by imports, and the generator bearings for racing cars have basically not entered this field. [0003] In the production process of the steel balls used in this project, the main key process points that affect the life are the material, heat treatment and surface strengthening process, as well as the implementation of the selection technology of the fatal defect of the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/003
Inventor 张立陈雅平
Owner TSUBAKI HOOVER TAICANG
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