Milling force prediction method for five-axis CNC side milling

Abstract

The invention provides a method for predicting milling force of five-axis numerical control side milling. The method comprises the steps that firstly, the current cutter spacing cutter-workpiece meshing area is acquired based on the distance field method, points and normal directions on a cutting edge of the current cutter spacing are converted to a previous cutter spacing cutter coordinate system, the analytical expression of a non-transformation cuttings thickness is obtained according to the line and face intersection method, and milling force coefficients are acquired through three-axis single-tooth milling experiment calibration; secondly, the cutter is dispersed into a plurality of slice infinitesimals in the axial direction, and the tangential milling force, the radial milling force and the axial milling force of the slice infinitesimals are obtained through calculation according to cutter geometrical parameter information, cutter-workpiece meshing area information, non-transformation cutting thicknesses calculated value and the milling force coefficients; lastly, the force coordinates are converted into the X-axis direction, the Y-axis direction and the Z-axis direction, and integration is carried out on the slice infinitesimals in the axial direction to obtain the five-axis side milling force predicting value at current time. By means of the method, the accuracy and efficiency of prediction and calculation on the milling force of five-axis side milling are improved.

Description

technical field [0001] The present invention relates to the technical field of Computer Aided Manufacturing (CAM), in particular to a five-axis CNC side milling milling force prediction method for cutting force prediction of any complex curved surface by five-axis side milling. Background technique [0002] In the field of machinery manufacturing, five-axis CNC side milling is widely used to process complex curved surface parts such as molds, integral impellers, and aviation thin-walled parts due to its obvious advantages in processing efficiency, processing quality, and manufacturing cost. However, due to the large contact area and complex processing state in side milling, the milling force is too large, and tool deformation or workpiece deformation often occurs, making it difficult to guarantee the processing accuracy. Milling force is a very important physical quantity in the milling process, which has an important impact on the milling process. Its size will directly aff...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, to provide a five-axis CNC side milling milling force prediction method, to solve the problem of tool-workpiece engagement area judgment and undeformed chip thickness in the existing five-axis milling force prediction method Calculate the existing problems of low accuracy and efficiency, so as to accurately and efficiently calculate the five-axis milling force

Images