Milling cutter cutting path generation method and system based on CNC milling machine

Abstract

The invention discloses a milling cutter cutting path generation method and system based on a CNC milling machine, and the method comprises the steps: obtaining an original point sequence, and sequentially connecting lines to form a plurality of segments of initial vectors; obtaining a bias point sequence according to the radius of the milling cutter, and sequentially connecting lines to form a plurality of sections of bias vectors; judging whether the direction of each section of bias vector is the same as the direction of the corresponding initial vector or not, if so, determining that the vector is an effective vector, and connecting the effective vectors which are continuously connected to form a plurality of sections of continuous vectors; calculating an intersection point of two adjacent sections of continuous vectors, and replacing the corresponding intersection point with an end point of each corresponding section of effective vector to form a plurality of discrete effective point sequences; sequentially connecting the effective point sequences, dividing the effective point sequences into a plurality of monotonic chains according to a monotonic change principle, and dividing the effective point sequences into a plurality of closed chains again according to intersection points among the monotonic chains; and generating a milling cutter cutting path according to each closed chain. Local interference in the motion trail of the milling cutter can be eliminated, and the cutting efficiency of the milling cutter is improved.

Description

technical field [0001] The invention relates to the technical field of CNC, in particular to a method for generating cutting paths of milling cutters based on a CNC milling machine. The invention also relates to a milling cutter cutting path generating system based on a CNC milling machine. Background technique [0002] With the development of technology, more and more manufacturing processes have been developed and applied. [0003] CNC (Computer Numerical Control, electronic numerical control) milling machine is a kind of numerical control machine tool, which realizes automatic processing technology on traditional milling machine. CNC milling machines have powerful functions, and the rapidly developing machining centers and flexible processing units are all produced on the basis of CNC milling machines. Because the NC milling process is more complicated and there are the most technical problems to be solved, milling is the current research focus. [0004] The shape of t...

AI Technical Summary

Problems solved by technology

[0006] However, due to the different shapes and structures of workpieces, it is inevitable that there will be some small and complex structural features, which will cause local interference when the tool moves according to the radius compensation trajectory, that is, a large number of invalid reciprocating movements or frequent reciprocating movements in the same area, or even no Continuous intermittent movement can easily lead to a decrease in the cutting efficiency of the milling cutter, an excessively long cutting path of the milling cutter, or even a sudden acceleration of the milling cutter to collide with the workpiece

Images