Soft abrasive flow ultra-precision machining two-phase flow monitoring method based on discrete phase model

Abstract

The invention provides a soft abrasive flow ultra-precision machining two-phase flow monitoring method based on a discrete phase model, comprising the following steps: 1) a two-phase flow discrete phase model facing to the soft abrasive flow ultra-precision machining is established, a soft abrasive flow work runner is a straight channel with a U-shaped cross section which consists of a structured surface to be processed and a constraint model and is meshed by an unstructured hexahedral grid, and the motion curve of discrete phase particles is solved by the differential equation of particle acting forces under an integral Lagrangian coordinate system; and 2) particle pressure is reflected by pressure additionally applied on the wall surface of the runner due to the action of collision among the particles, and the variation condition of the soft abrasive flow line etching rate along the runner direction is obtained by extracting the particle pressure and particle speed. The invention can effectively monitor grinding quality in the whole runner environment and simplify calculation.

Description

technical field [0001] The invention relates to the field of ultra-precision machining, in particular to an abrasive particle flow monitoring method for ultra-precision machining of mold structured surfaces. Background technique [0002] For the ultra-precision machining of structured surfaces such as grooves, grooves, holes, prisms, pyramids, and narrow slits involved in mold manufacturing, traditional grinding methods have great limitations, mainly in the small scale of structured surfaces, The structure is complex, and hard solid tools cannot be processed. Abrasive JetMachining (AJM) is mostly used for processing and grinding of brittle and hard materials. At present, the widely used abrasive flow processing method is through the soft abrasive medium—a kind of viscoelastic body loaded with abrasives. light finishing. The above traditional abrasive flow machining method has simple equipment and low cost, but it is difficult to further improve the machining accuracy beca...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the existing soft abrasive flow ultra-precision machining two-phase flow that cannot monitor the grinding quality in the entire flow field environment and the calculation is complicated, the present invention provides a grinding machine that can effectively monitor the entire flow field environment. Two-phase flow monitoring method for ultra-precision machining of soft abrasive flow based on discrete phase model based on cutting quality and simplified calculation

Images