Method for compensating cutting error of hard-brittle material thin-walled component

Abstract

The invention provides a method for compensating a cutting error of a hard-brittle material thin-walled component. The method comprises the steps of firstly building a cutting force model for cutting a material of the thin-walled component, then calculating a cutting force according to the actual radial cutting depth, solving the deformation of each discrete position in finite element analysis software by taking the actual cutting force as a load value, and finally generating a numerical control program with error compensation by taking the deformation as an error compensation value. Compared with the existing thin-walled component machining error compensation method, the method provided by the invention is higher in compensation accuracy and higher in calculation efficiency.

Description

technical field [0001] The invention relates to a processing error compensation method for thin-wall parts of hard and brittle materials. Primarily relating to patent classification G05 Control; regulation G05B Control or regulation systems in general; functional units of such systems; monitoring or testing devices for such systems or units The digital control G05B19 / 404 features compensating controls, eg for backlash, overshoot, tool deflection, tool wear, temperature, machine construction errors, load, inertia. Background technique [0002] With the development of science and technology, the application of thin-walled parts and thin-walled structures is becoming more and more extensive, especially in the field of aerospace, such as impeller blades of aeroengines, aircraft skins, etc., and the application of large overall thin-walled components is becoming more and more extensive. On the premise of ensuring the strength, the light weight rate is improved and the workabilit...

AI Technical Summary

Problems solved by technology

[0003] However, due to the low rigidity of thin-walled parts, the processing technology is poor. Under the action of cutting force, cutting heat, cutting vibration and other factors, processing deformation is easy to occur, resulting in large processing errors and affecting processing quality.

[0004] At present, the common solution is to perform multiple empty tool passes in the last process. Although the error can be reduced to a certain extent, the processing efficiency is low

[0005] In addition, the reverse deformation method is also used for error compensation. The principle of the reverse deformation method is to measure the error of the thin-walled parts processed by the uncompensated processing method, and use the error as a compensation value to regenerate the tool path containing the compensation value for processing. The error can be reduced to a certain extent, but the error cannot be completely eliminated, and the compensation accuracy is limited. In addition, an iterative algorithm is used to solve the error compensation value. Although the accuracy is high, the calculation efficiency is low

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