Method for determining parameters for rolling contact quenching dry hard machined workpiece

A technology of rolling contact and parameter selection, applied in metal processing mechanical parts, automatic control devices, electrical digital data processing, etc., can solve the problems that cannot provide scientific basis for the optimization of fine and hard dry cutting parameters of superhard material parts

Inactive Publication Date: 2005-05-11
SHANGHAI JIAO TONG UNIV
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  • Abstract
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Problems solved by technology

It can be seen that the current optimization of fine-hard cutting parameters with surface integrity as the optimization target has obvious defects, and cannot provide a scientific basis for the optimization of fine-hard dry cutting parameters for superhard material parts

Method used

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  • Method for determining parameters for rolling contact quenching dry hard machined workpiece
  • Method for determining parameters for rolling contact quenching dry hard machined workpiece
  • Method for determining parameters for rolling contact quenching dry hard machined workpiece

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[0047] Such as figure 1 As shown, the customized production process of hardened rolling bearings: (1) Determine the working stress range according to the service conditions of specific rolling bearings (load, friction, load properties, etc.), and input them as initial values; (2) Determine the hardened The constraint conditions of dry cutting parameters, that is, the reasonable range of cutting speed, cutting depth, feed rate, tool wear, etc.; (3) Under the achievable process conditions, determine all the cutting process parameter sets that meet the surface accuracy requirements; ( 4) Determine the initial residual stress of the contact surface of the hardened rolling bearing in hard dry cutting under the set of all cutting process parameters that meet the requirements; The minimum stress is optimal, so the optimal combination of cutting process parameters is optimized. The service conditions of typical rolling bearings are shown in Table 1.

[0048] Ta...

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Abstract

A parameter selection method includes setting maximum roll contact stress as per part structure, setting constraint condition of cutting parameter as per surface roughness of hardened part, confirming parameter subset of all precision dry hard cutting by residual stress model, superimposing work stress with initial residual stress at part surface for selecting out cutting parameter subset to make valent weight stress value at crack producing point in actual roll contact region minimum and maximum.

Description

technical field [0001] The invention relates to a method for selecting parameters in the technical field of material cutting, in particular to a method for optimizing parameters of fine and hard dry cutting rolling contact hardened parts. Background technique [0002] With the practical application of superhard cutting tools, such as cubic boron nitride (PCBN) cutting tools and ceramic cutting tools, and the improvement of the precision of CNC machine tools, ultra-fine hard dry cutting is becoming the first choice for processing superhard materials such as hardened bearing steel instead of grinding technology. The new way is one of the potential mainstream technologies for high-efficiency, precise and clean processing of high-hardness materials. Compared with the grinding process, the main competitive advantage of superfine hard cutting is not only reflected in good processing flexibility, economy, and environmental protection, but also in that it can obtain a very definite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q15/00G06F17/50
Inventor 张雪萍刘中鸿
Owner SHANGHAI JIAO TONG UNIV
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