A 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. Several segments of offset vectors; judge whether the direction of the offset vectors of each segment is the same as that of the corresponding initial vector, if so, it is an effective vector, and connect the effective vectors of each segment to form several segments of continuous vectors; calculate the corresponding Adjacent to the intersection of two consecutive vectors, and replace the corresponding intersection points with the endpoints of the corresponding effective vectors to form a number of discrete effective point sequences; sequentially connect each effective point sequence, and divide it into several monotone chains according to the principle of monotonous change , and then re-divide the effective point sequence into several closed chains according to the intersection points between the monotone chains; generate the milling cutter cutting path according to each closed chain. The invention can eliminate the local interference in the movement track of the milling cutter and improve the cutting efficiency of the milling cutter.

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...

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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

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