Abrasive flow machining numerical simulation research method based on molecular dynamics

Abstract

The invention relates to an abrasive flow machining numerical simulation research method based on molecular dynamics. According to the method, numerical simulation researches are carried out on a machining course by taking a single abrasive grain as a tool. Specifically, the method comprises the following steps: (1) carrying out abrasive flow machining course simulation researches on the basis of molecular dynamics; (2) establishing an abrasive micro-cutting molecular dynamic model; (3) discussing the influence of related parameters on energy change in the machining course and analyzing the quality of a machined surface; and (4) exploring the influence of abrasive machining on an abrasive crystal structure at a micro-scale. According to the method disclosed by the invention, by researching and analyzing a single-abrasive micro-cutting process in the abrasive flow machining course by virtue of a molecular dynamics method, atomic displacement in a Newtonian layer of a workpiece during the abrasive micro-cutting process can be calibrated; and the method can be used for achieving molecular dynamic simulation of abrasive grains and pointing out that bond angle of an abrasive grain can be changed in the course of machining the abrasive grains, so as to lay a theoretical foundation for the subsequent researches on the deformation of the abrasive crystal structure in the abrasive flow machining course.

Description

technical field [0001] The invention relates to a numerical simulation research method based on molecular dynamics abrasive flow processing, which belongs to the technical field of mechanical processing. Background technique [0002] With the development of science and technology, mechanical processing is moving towards the field of micro and ultra-precision processing technology. The gap between friction pairs in many high-end products has become smaller and smaller, beginning to enter the nanometer level, and micro-tribology has become another important theory in mechanical engineering applications. [0003] Abrasive flow machining can achieve smoothing of the inner wall of special channels and improve the surface finish of the workpiece. Therefore, abrasive flow machining can solve the precision machining of complex shape parts that cannot be achieved by other traditional processing methods, making it play an important role in the field of precision machining. important ...

AI Technical Summary

Problems solved by technology

However, in the research on the abrasive cutting process, it is generally difficult to reflect the dynamic change process by using simple formulas to calculate the wear amount or to observe and analyze the workpiece surface through experiments.