A five-axis micro-segment machining path smoothing method

Abstract

The invention discloses a five-axis micro-line segment processing path smoothing method, comprising the following steps: reading in the five-axis processing path code, and obtaining a series of coordinates P of the tool tip point i (X i , Y i ,Z i ), i=1, 2, 3...k, and the corresponding coordinates of the tool axis point P oi (X oi , Y oi ,Z oi ), i=1, 2, 3...k; establish a mathematical model of a quartic B-spline curve; step 2, select three adjacent tool tip points in turn, and use a quadratic B-spline curve for the three adjacent tool tip points The machining path is smoothed by using a curve mathematical model; three adjacent tool axis points are selected in turn, and the machining path is smoothed by using a quartic B-spline curve mathematical model for the three adjacent tool axis points. In the application, the present invention adopts the form of external transition, which can make the transition curve obtain a smaller curvature extreme value, and the present invention reduces the curvature maximum value of the transition curve at the tool tip point, and makes the processing path smoother.

Description

technical field [0001] The invention relates to a smoothing method in mechanical manufacturing technology, in particular to a five-axis micro-line segment processing path smoothing method. Background technique [0002] At present, five-axis CNC machine tools are widely used in the field of high-speed and high-precision machining, such as mold making and complex curved surface machining, because of their easy clamping, high production efficiency, and strong flexibility. For five-axis modern industrial product modeling design, parametric curves are used more and more, but because most of the CAM software used to generate NC machining codes cannot directly generate parametric curves, so a large number of micro-line segments are used in most cases To approximate the parametric surface used in the design, so as to realize the production machining of five-axis complex workpieces. However, the method of processing curves and surfaces with micro-line segments will bring disadvantag...

AI Technical Summary

Problems solved by technology

However, the literature does not give the analytical solution of the maximum curvature of the outer transition curve, which will increase the difficulty of calculation in the later interpolation, and the use of a completely symmetrical transition curve, in the general case of transition, there is still a discontinuity of the tool axis Appear

Images