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Large-diameter steel ball hard-turning method

A processing method and large-diameter technology, applied in the field of steel ball processing, can solve the problems of low precision, high cost, grinding burns, etc., and achieve high processing efficiency, reduce processing costs, and improve product quality.

Inactive Publication Date: 2015-05-20
WAFANGDIAN BEARING GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of low efficiency, high cost, low precision, grinding burns and other problems of traditional processing methods, the purpose of the present invention is to provide a large-diameter steel ball hard turning processing method

Method used

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Effect test

Embodiment Construction

[0012] like figure 1 , figure 2 As shown, the precision CNC lathe is used for turning in two directions. The spherical error and roundness tolerance are easy to control and do not require repeated grinding, which solves the dual problems of uncontrollable quality and low efficiency; use double hollow fixtures to limit all degrees of freedom and repeat positioning. High precision, the hollow fixture is self-carrying on the machine tool, the clamping error is extremely small and negligible, the spherical error and roundness of the processed steel ball are within 0.02mm, which lays a good foundation for the subsequent grinding and solves the problem of long-term grinding Grinding burns, grinding wheel chipping, and vibration of machine tools caused by out-of-roundness and uneven allowance.

[0013] After process verification, it not only easily meets the accuracy requirements of this process, but also solves the problems of low rough grinding efficiency, high cost, uneven reten...

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Abstract

The invention provides a large-diameter steel ball hard-turning method. The large-diameter steel ball hard-turning method comprises the following steps of 1 conducting automatic turning on a hollow clamp and enabling the hollow clamp to meet the requirements for rotation accuracy and core portion positioning-clamping accuracy equivalent to the accuracy of a machine tool spindle, 2 selecting an appropriate hard-turning allowance according to the deformation amount and finished product size of a steel ball subjected to heat treatment, and 3 performing clamping and turning in two-time mode, wherein the first-time turning is used for turning and removing most of area except a clamped position and decreasing the area for second-time turning, and a workpiece is needed to rotate at 90 degrees during the first-time turning and the second-time turning. The large-diameter steel ball hard-turning method has the advantages of being high in machining efficiency, reducing machining cost, improving product quality and the like.

Description

technical field [0001] The invention relates to a novel steel ball processing method, in particular to a large-diameter steel ball hard turning processing method, which is used for the semi-finishing process of super-large bearing steel balls. Background technique [0002] At present, the semi-finishing of traditional ultra-large bearing steel balls (more than 150mm in diameter) after heat treatment adopts the method of centerless grinding, which is to trim the grinding wheel into the shape of the outer arc of the steel ball for profiling grinding. This processing method is inefficient, requires a large amount of pre-process reserve, high processing cost, low precision of the processed product, and the cut iron filings cannot be reused. Centerless mills have strict requirements on steel ball retention and heat treatment deformation before heat treatment. Due to uneven allowance and uneven processing caused by deformation, it will lead to grinding burns, grinding wheel chipp...

Claims

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Application Information

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IPC IPC(8): B23B1/00
CPCB23B1/00
Inventor 赵铭孙振生张丽娜王立成王建华
Owner WAFANGDIAN BEARING GRP CO LTD
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