Cutter radius compensation method for five-axis numerical control side milling machining

Abstract

The invention relates to a cutter radius compensation method for five-axis numerical control side milling machining. The cutter radius compensation method comprises the following steps of: 1) pre-reading and analyzing an instruction: confirming a cutter offset direction and a cutter radius and confirming a cutter central point coordinate and a cutter axial vector of each point on a machining path; 2) confirming a mapping plane: confirming a corresponding mapping plane of each point according to the cutter central point coordinate and the cutter axial vector of each point on the machining path; 3) confirming a mapping relation: confirming a space coordinate conversion relation between a programming coordinate system and a mapping plane coordinate system; 4) compensating a radius of a cutter in the mapping plane: converting the cutter central point coordinate of each point under the programming coordinate system into a coordinate in the mapping plane coordinate system and confirming a cutter compensation vector corresponding to each point; and 5) confirming a space cutter radius compensation vector: confirming a compensated cutter central point coordinate of the mapping plane coordinate system and confirming the cutter central point coordinate corresponding to each point after being subjected to space cutter compensation. The cutter radius compensation method provided by the invention is used for solving the problem of an invalid cutter radius compensation function in five-axis machining and promoting the applicability and operability of a five-axis NC (Numerical Control) program.

Description

technical field [0001] The invention relates to a numerical control device for controlling a five-axis numerical control machine tool in a numerical control system, in particular to a tool radius compensation method for five-axis numerical control side milling. Background technique [0002] Five-axis CNC machining is an advanced manufacturing technology developed to overcome the shortcomings of three-axis machining. By adding two rotation axes, the flexibility of machining is greatly enhanced. It has obvious advantages and important practical significance in industries such as , ships and molds. The five-axis CNC machine tool moves the tool in three linear axes relative to the workpiece, and at the same time rotates around the two axes so that the tool feeds the workpiece at different angles, and can provide a line cutting mode for side edge milling. Compared with the end milling mode of point cutting, it can not only greatly improve the processing efficiency, but also impr...

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Problems solved by technology

However, the above two methods have the disadvantages of increasing processing costs and difficulty in maintaining NC programs for on-site processing. At the same time, the applicability of NC programs is also greatly reduced.

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