Programming Method of NC Machine Tool Arc Machining

Abstract

The invention discloses an arc processing programming method of a numerical control machine tool. The method comprises the steps that 1) a minimum point of a cutter serves as a tool setting point, namely a processing start point, a mathematical model is established according to the arc radius R of a workpiece and an arc radius r of the cutter, movement track equations of the minimum point of the cutter are determined, the movement track equation of the minimum point of a convex circular cutter is x2+(y+r)2=(R+r)2, and the movement track equation of the minimum point of a concave circular cutter is x2+(y+r)2=(R-r)2; and 2) the arc of the workpiece is divided into a concave circle and a convex circle, and according to the movement track equations of the minimum point of the cutter and the shape of the workpiece, an arc interpolation instruction is applied for programming. The method has the advantages that cutter radius compensation and cutter position discrimination are not needed, andthe arc of the workpiece can be completed only via G02 and G03 arc interpolation. When the method is applied to arc programming, ideals are simple, and the precision of processed components is high. The disadvantages that arch radius compensation is low in cutting efficiency and programming is tedious and complex are overcome, the processing efficiency is improved, and the percent defective is reduced.

Description

technical field [0001] The invention relates to a programming method for arc machining of a numerically controlled machine tool. Background technique [0002] In CNC machining, the operator of the machine tool is often the compiler of the part cutting program, which requires the programming of the program to be simple, easy to adjust, and high in machining accuracy. Arc machining embodies the advantages of CNC lathes, but in the actual processing of large arcs, it is often encountered that arc cutters are used to process arcs. Now when programming round head cutters for CNC machining, the tool radius needs to be compensated. . Before processing the workpiece, the relevant data of the tool arc radius compensation should be input into the memory, so that the CNC system can automatically compensate the error caused by the tool arc radius. The parameters representing the shape and position of the turning tool should also be input into the memory. When performing tool radius co...

AI Technical Summary

Problems solved by technology

The cutting point of the tool is constantly changing. In many cases, due to the inability to accurately find the node, the tool radius compensation operation is cumbersome, the improper selection of the processing technology or the lack of auxiliary calculation tools often cause programming difficulties, and in severe cases, abnormal machining errors occur.

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