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Method for calculating surface roughness of workpiece during turning based on tool wear

A technology for workpiece surface and tool wear, applied in complex mathematical operations and other directions, can solve the problem of not considering the influence of workpiece surface roughness, etc., and achieve the effect of improving surface quality, simple calculation method and high precision

Inactive Publication Date: 2020-06-02
SHANDONG UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, none of the above models considered the effect of tool wear on the surface roughness of the workpiece.

Method used

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  • Method for calculating surface roughness of workpiece during turning based on tool wear
  • Method for calculating surface roughness of workpiece during turning based on tool wear
  • Method for calculating surface roughness of workpiece during turning based on tool wear

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Embodiment Construction

[0018] Combine below figure 1 figure 2 The present invention is further described in detail.

[0019] In step 1), based on the metal cutting theory, according to the relationship between the turning parameters and the surface roughness of the workpiece, and considering the influence of tool wear on the surface roughness of the workpiece, a calculation model for the surface roughness of the workpiece during turning is established:

[0020] R a =k×a p a × f b ×V c ×VB d (1)

[0021] Among them, R a is the workpiece surface roughness; VB is the flank wear amount of the turning tool, which is the characteristic value of the tool wear condition; a p Is the amount of back cut; f is the feed; V is the cutting speed; k, a, b, c and d are undetermined coefficients.

[0022] In step 2), use the roughness meter and metallographic microscope to measure and calculate the undetermined coefficients in the calculation model of the surface roughness of the workpiece during turning....

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Abstract

The invention provides a method for calculating the surface roughness of a workpiece during turning based on tool wear, and the method comprises the following steps: 1), building a calculation model of the surface roughness of the workpiece during turning according to the relation between turning parameters and the surface roughness of the workpiece and considering the impact on the surface roughness of the workpiece from the tool wear condition; 2) performing a turning experiment, and measuring and calculating each undetermined coefficient in the workpiece surface roughness calculation modelby means of a roughness instrument and a metallographic microscope; and (3) under the condition that the tool material, the workpiece material and the machining mode are the same, for a new turning process scheme, calculating the surface roughness of the workpiece during turning according to the turning parameters and the wear loss of the rear tool face of the turning tool. The method has the advantages that the surface roughness of the workpiece is calculated by comprehensively considering influence of turning parameters and tool wear conditions, and the calculation method is simple and highin precision; and process parameter selection is facilitated to improve the surface quality and reduce the rejection rate.

Description

technical field [0001] The invention relates to a method for calculating the surface roughness of a workpiece, in particular to a method for calculating the surface roughness of a workpiece during turning based on tool wear. Background technique [0002] The turning process is the use of turning tools to remove excess metal from a rotating workpiece to form a machined surface. The surface roughness of the workpiece is an important parameter to characterize the processing quality of the workpiece, and has a significant impact on the performance of the workpiece. Generally speaking, the rougher the surface of the workpiece, the more prone to stress concentration, which affects the fit accuracy and aggravates the wear caused by the mutual movement of the workpieces. [0003] Many scholars have studied how to predict the surface roughness of the workpiece according to the cutting amount of the tool and the geometric parameters of the tool. In the paper "Application of Response...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/10
CPCG06F17/10
Inventor 赵国勇李春霄郑光明孟建兵周海安
Owner SHANDONG UNIV OF TECH
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