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Method for generating numerical-control side milling machining tool path for complicated curved surfaces

A surface and tool path technology, which is applied in the field of tool path generation for five-axis CNC side milling machining of complex composite surfaces, can solve problems such as the lack of research on composite surface machining problems, and achieves the advantages of small machining interference, improved efficiency, and guaranteed fitting accuracy. Effect

Active Publication Date: 2012-08-15
SUZHOU MACHINING PRECISION ELECTRONICS
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AI Technical Summary

Problems solved by technology

However, the above methods are all proposed for the end milling of combined curved surfaces. There is little research on the processing of combined curved surfaces encountered in five-axis side milling, and there is no published method yet.

Method used

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  • Method for generating numerical-control side milling machining tool path for complicated curved surfaces
  • Method for generating numerical-control side milling machining tool path for complicated curved surfaces
  • Method for generating numerical-control side milling machining tool path for complicated curved surfaces

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Embodiment Construction

[0028] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0029] figure 1 It is a flow chart of the five-axis side milling processing method for complex combined curved surfaces of the present invention, as shown in the figure, including the following steps:

[0030] The first is to select various elements, including combined surfaces and guide lines, and set various parameters, including the distance between section planes, the maximum discrete step size, and the maximum chord height error. Such as figure 2 As shown, the selected combined surface is a group of surfaces that conform to a certain processing technology and can be processed as a whole; the selected guide line is a curve that runs through a certain parameter direction of the combined surface and is basically consistent with the direction of the surface, and can exceed the direction of the combined surface. outline. The distance between the sec...

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Abstract

The invention discloses a method for generating a five-axis numerical-control side milling machining tool path for a complicated combined curved surface. The method includes obtaining a section line by means of intersecting section planes and the combined curved surface, dispersing the section line into points according to a certain precision rule, then interpolating and fitting the disperse points on the various section planes by a spline curve B, and then fitting the section line into a spline surface B by the aid of skinning; and computing errors of the fit spline surface and the original combined curved surface, returning to the curve dispersion step if the precision requirement is not met, realizing dispersion with higher precision, fitting a spline curve, fitting a spline surface until the errors of obtained fitting curved surface meet the precision requirement, finally adopting a tool path generating algorithm combining integral arbor swing angle control with local fine adjustment and computing the machining tool path by the aid of the obtained fitting curved surface as a driving curved surface. The method is high in efficiency and precision, the side milling machining tool path for the combined curved surface is generated, an arbor swings stably and uniformly, and machining quality is high.

Description

technical field [0001] The invention relates to a tool track generation method for five-axis numerically controlled side milling of complex combined curved surfaces, and belongs to the technical field of CAD (Computer Aided Design) / CAPP (Computer Aided Process Planning) / CAM (Computer Aided Machining). Background technique [0002] With the development of CAD / CAM technology and the requirements of product performance, the geometric design of products is becoming more and more complex, and the requirements for manufacturing technology are also getting higher and higher. Composite surfaces refer to surfaces composed of multiple surfaces with common boundaries. More generally, surfaces can overlap, overlap or even have cracks. Composite curved surfaces are very common in aircraft structural parts, mainly due to the following reasons: (1) Due to the needs of part design, the digital model surface of parts is often composed of multiple irregular curved surfaces; (2) The curved sur...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 李迎光王伟刘长青刘旭傅浩杰
Owner SUZHOU MACHINING PRECISION ELECTRONICS
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