A Tool Path Generation Method Based on Triangular Mesh Offset Compensation and Its NC Machining System

A triangular mesh and path generation technology, applied in general control systems, control/adjustment systems, program control, etc., can solve the problems affecting the machining accuracy of NC machining, machining overcut, unavoidable offset and overcut, etc. problems, to achieve the effect of reliable use, over-cutting, and simple operation

Active Publication Date: 2017-12-26
GUANGDONG UNIV OF TECH
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Problems solved by technology

This will cause the overcut phenomenon of actual CNC machining and affect the machining accuracy of CNC machining
[0004] After retrieval, Chinese patent 200810159746.1 discloses a "triangular grid subdivision surface NC tool path generation method", although the method discloses the generation method of the tool path in detail, but the generation algorithm cannot avoid the offset and Occurrence of overcutting

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  • A Tool Path Generation Method Based on Triangular Mesh Offset Compensation and Its NC Machining System
  • A Tool Path Generation Method Based on Triangular Mesh Offset Compensation and Its NC Machining System
  • A Tool Path Generation Method Based on Triangular Mesh Offset Compensation and Its NC Machining System

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Embodiment 1

[0065] The complete process of the present invention is as Image 6 As shown, the complete triangular mesh establishment process is as follows: (1) establish the triangular mesh model (2) bias the triangular mesh model according to the vertex bias method and obtain the biased triangular mesh model, in which Set the distance as the radius of the ball head tool; (3) Obtain the data information of the triangular mesh, reconstruct the data information of the triangular mesh model, and extract the coordinate information of each vertex and the data information of the adjacent surface; (4) Calculate the normal vector direction of each vertex of the triangular mesh through the data information of the adjacent surface of the vertex; (5) calculate the offset compensation distance according to the offset compensation method; (6) perform binary calculation on each vertex according to the calculated compensation distance Secondary offset; (7) Connect all vertices obtained after the seconda...

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Abstract

The invention provides a triangle mesh offset compensation method used for cutter position path generation. Offset distance compensation is carried out on a triangle mesh acquired through a vertex offset method again. The specific method comprises the steps that an angle between the current vertex and each adjacent patch normal vector is calculated; the effective offset compensation distance of each patch for the current vertex is calculated; the weight of each patch is calculated; the weight ratio of each patch is calculated; the offset compensation distance of the current vertex is calculated; and the offset distance is the sum of the radius of a ball head cutter and the offset compensation distance. The method automatically compensates the offset distance through calculation, and has the advantages of easy operation and reliable use. A CL path section plane method which carries out direct numerical control processing on a triangle mesh is supplemented and improved. The problem of processing overcut of direct triangle mesh numerical control processing is solved. The processing precision of direct triangle mesh model numerical control processing is improved.

Description

technical field [0001] The invention relates to a method for generating a tool position path based on triangular mesh offset compensation, and also relates to a numerical control machining system utilizing the method, belonging to the technical field of digital control systems in numerical control machining machine tools. Background technique [0002] With the development of computer technology and digital manufacturing technology, more and more physical parts directly realize NC programming and processing through the scanned triangular mesh model (the triangular mesh model is a series of interconnected triangular faces in three-dimensional space. A form of surface discrete approximation composed of triangular meshes can flexibly reflect the complex shape of the actual surface, so it is suitable for scattered data point sets with arbitrary distribution, making it suitable for surface reconstruction, surface segmentation and model smoothing and other technical fields have bee...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/404
CPCG05B19/404
Inventor 高健文豪张亚丽邓海祥项魁卜研杨杰
Owner GUANGDONG UNIV OF TECH
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