A Prediction Method of Single Crystal Copper Micro Milling Force Based on Cutting Process Simulation

Abstract

The invention belongs to the field of precise and efficient processing of a micro part, and particularly relates to a cutting process simulation-based single-crystal copper micro-milling force forecast method. The cutting process simulation-based single-crystal copper micro-milling force forecast method comprises the steps of initially and comprehensively considering influence of factors such as crystal deformation kinematics, a crystal plasticity constitutive relation and hardening law of rate-dependent crystal on single-crystal copper micro-milling due to the specialty of a single-crystal copper material; secondly, deducing an incremental form of a constitutive equation, writing single-crystal copper VUMAT user material sub-program by employing a Fortran language, and introducing crystalplasticity constitution into a finite element simulation; and finally, performing simulation modeling on the single-crystal copper micro-milling process by ABAQUS software to achieve single-crystal copper micro-milling force forecast. By taking finite cutting simulation as a basis, accurate forecast of a single-crystal copper micro-milling force is achieved, a technical support is provided for researching the single-crystal copper micro-milling process, the processing accuracy and efficiency of single-crystal copper micro-milling is improved, and the cutting process simulation-based single-crystal copper micro-milling force forecast method has a practical application value.

Description

technical field [0001] The invention belongs to the field of precision and high-efficiency machining of tiny parts, and in particular relates to a single crystal copper micro-milling force prediction method based on cutting process simulation. [0002] technical background [0003] With the advancement of science and technology, microstructures / parts in aerospace and other fields must not only meet the requirements of processing technology, but also meet some special requirements, such as high-quality electrical conductivity. Single crystal copper has a consistent crystallographic orientation, only one grain, and no grain boundary inside. Its electrical conductivity exceeds that of ordinary metals and it has good thermal, fatigue and creep properties, making it widely used in aerospace and other fields. Micro-milling technology is an effective means to process tiny parts of single crystal copper. It is of great significance to study the micro-milling technology of tiny parts...

AI Technical Summary

Problems solved by technology

[0006] Although there are many micro-milling force modeling methods, due to the anisotropy of single-crystal copper materials, the micro-milling mechanism of single-crystal copper with different crystal orientations is also different, and there is still a lack of single-crystal copper micro-milling force prediction methods for cutting process simulation.

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