Generation and optimizing processing method of constant scallop-height knife contact track for five-axis numerical control processing

Abstract

The invention discloses a generation and optimizing processing method of a constant scallop-height knife contact track for five-axis numerical control processing. The method is characterized in that two steps of self-adaptive projection biasing of a knife contact and optimizing of a knife contact track are carried out to perform corresponding calculation. According to the method, the self-adaptive project biasing method is provided to generate five-axis and other residual knife contact tracks for the five-axis processing of a complex grid model; the knife tracks are processed by smoothening, track point optimizing and self-intersecting removing, and as a result, the ideal knife contact track is obtained.

Description

technical field [0001] The invention relates to the field of five-axis numerical control machining, in particular to a method for generating and optimizing a tool contact track of equal residual height for five-axis numerical control machining. Background technique [0002] Five-axis machining has significant advantages in the ability, quality and efficiency of machining parts with complex shapes, and has been more and more widely used. As a representative of the triangular mesh model, the STL model is widely used in the fields of rapid prototyping and CNC machining, and has become one of the three commonly used models (ie IGES, STEP and STL) for exchanging data between different CAD / CAM systems. , one of the main methods of continuous surface model processing is also the use of discrete polyhedron processing methods. [0003] Compared with three-axis machining, the research on five-axis machining trajectory includes tool contact / tool ​​point trajectory generation, global i...

AI Technical Summary

Problems solved by technology

The offset algorithm directly based on the mesh surface is simple and clear, and has strong applicability, but it is greatly affected by the calculation accuracy of differential geometric information, and the trajectory is prone to large fluctuations; The bias effect is better, but its algorithm is relatively complicated

Someone proposed the mesh model deformation method to generate the residual three-axis machining trajectory, and extended it to five-axis machining. The basic principle is to use a series of planes to intersect with the deformed tool plane, and then reverse the deformation after obtaining the trajectory. Obtain the tool position trajectory, so this method is also difficult to apply to the five-axis machining trajectory planning of complex models

[0004] In conclusion, although five-axis machining and triangular mesh models have been widely used respectively, the research on the generation of residual tool paths such as triangular mesh model five-axis machining is still insufficient, especially for complex mesh models. effective method

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