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Optimized cutter selecting method for numerical control milling for free-form surface

A CNC milling and curved surface technology, applied in the direction of program control, computer control, general control system, etc., can solve problems such as tool interference, achieve the effect of ensuring accuracy, improving processing efficiency and effect, and improving processing efficiency

Inactive Publication Date: 2012-06-13
GUANGZHOU CITY POLYTECHNIC
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  • Abstract
  • Description
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Problems solved by technology

[0004] In order to solve the technical problem that tool interference is easily caused by manual selection of tools alone during NC machining of free-form surfaces, the present invention provides an optimal tool selection method for NC milling of free-form surfaces. This method realizes intelligent tool selection for free-form surfaces, avoids tool interference and Improve the precision and efficiency of CNC machining

Method used

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  • Optimized cutter selecting method for numerical control milling for free-form surface
  • Optimized cutter selecting method for numerical control milling for free-form surface
  • Optimized cutter selecting method for numerical control milling for free-form surface

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Embodiment

[0018] The present invention constructs a curved surface to be processed through the point cloud, which is a cubic NURBS curved surface. Spherical milling cutters with diameters of φ4, φ6, φ8, φ10, φ16 and φ20 can be used to generate equidistant tool positions for the same free-form surface; surface. Then by observing the tool position surface, it can be judged whether tool interference occurs.

[0019] see figure 1 , the numerical control milling process optimization tool selection method of free-form surface of the present invention, comprises the following steps:

[0020] S101. Obtain point cloud data or CAD three-dimensional graphics of free-form surface graphics;

[0021] S102, processing point cloud data, and reconstructing a free-form surface;

[0022] S103, whether to use the automatic tool selection mode, if the automatic tool selection mode is adopted, then go to step S201, otherwise, if the manual tool selection mode is adopted, then go to step S301;

[0023] S...

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Abstract

The invention discloses an optimized cutter selecting method for numerical control milling for a free-form surface, which includes the steps: (1) obtaining point cloud of the free-form surface and remodeling the free-form surface; (2) generating a cutter location surface according to geometric parameters of manually selected cutter types; (3) providing cutter interference results; (4) commonly checking cutter interference by means of rapid sorting algorithm when in automatic cutter selection; (5) recommending optimized machining cutters; and (6) manually checking cutter interference. A system is built for numerical control milling for the free-form surface, the cutter location surface is automatically generated according to the parameters of the selected cutters, the cutter interference results are visually distinguished, the optimized machining cutters can be automatically recommended by means of computing, cutter interference is avoided, and machining efficiency can be improved.

Description

technical field [0001] The invention relates to the field of computer-aided manufacturing, and specifically designs a method for optimal tool selection in numerically controlled milling of free-form surfaces. Background technique [0002] Curved surfaces that freely change in complex ways in the field of shape expression are called free curved surfaces. Surface modeling is an important content of computer-aided geometric design and computer graphics. It mainly studies the representation, design, display and analysis of surfaces in the computer graphics and image environment. After more than 30 years of development, surface modeling has now formed a geometric theoretical system based on the two methods of rational B-spline surface parametric feature design and implicit algebraic surface representation, and by means of interpolation, fitting, and approximation. . [0003] Freeform surfaces have been widely used in complex product designs in equipment manufacturing, automobil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/4097
Inventor 肖苏华龚雄文陈建环
Owner GUANGZHOU CITY POLYTECHNIC
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