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

A technology of equal residual height and processing method, which is applied in the field of the generation and optimization of the residual height tool contact trajectory, and can solve the problems of the fluctuation of the trajectory, the lack of effective methods, and the large influence of the calculation accuracy of differential geometric information.

Inactive Publication Date: 2015-02-04
HUAQIAO UNIVERSITY
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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

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

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Embodiment Construction

[0057] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0058] A method for generating and optimizing the tool contact trajectory with equal residual height for five-axis CNC machining. The basic process is as follows: figure 1 ,details as follows:

[0059] (1) Read in the triangular mesh model and establish a data structure based on half-edges; use the method of weighted average of the area and angle of the normal vector of the triangle patch in the vertex neighborhood to calculate the normal vector of the vertex of the mesh model, and the normal vector of the internal point of the patch is Calculation based on the area weighting method of the normal vectors of the three vertices of the patch; the local quadratic surface fitting method is used to estimate the principal curvature of the knife contact, and the Euler formula is used to calculate the curvature of the knife contact in a given ...

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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...

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Application Information

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IPC IPC(8): G05B19/4097
CPCG05B19/4099G05B2219/45213
Inventor 黄常标江开勇刘斌祁杨亭林俊义
Owner HUAQIAO UNIVERSITY
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