General method for machining complex curved surface of non-spherical cutter in multi-axis-linkage CNC manner

A technology of complex surfaces and general methods, which is applied in the field of multi-axis linkage CNC machining of complex surfaces with aspherical tools, and can solve the problems of complex surface planning, precision control and interference checking of aspherical tools, and no optimization theory for tool motion control is formed.

Active Publication Date: 2016-08-03
GUILIN FUDA GEAR +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, due to the lack of a unified and standardized description method for the complex tool motion in five-axis and multi-axis CNC machining, and the problems of tool position planning, precision control and interference inspection of aspheric t...

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  • General method for machining complex curved surface of non-spherical cutter in multi-axis-linkage CNC manner
  • General method for machining complex curved surface of non-spherical cutter in multi-axis-linkage CNC manner
  • General method for machining complex curved surface of non-spherical cutter in multi-axis-linkage CNC manner

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Embodiment Construction

[0054] The present invention will be further described below in conjunction with accompanying drawing:

[0055] The present invention comprises the following steps:

[0056] (1) Design the generating motion of the tool relative to the surface of the workpiece:

[0057] (1) Use the tool surface with a vector function Σ with continuous third-order partial derivatives t :r t = r t (u t ,υ t ) description, where u t ,υ t Form an orthogonal parameter network, and use the vector function Σ with continuous third-order partial derivatives to process the surface p :r p = r p (u p ,υ p ) description, where u p ,υ p Form an orthogonal parameter network. The tool contact trajectory curve L on the surface to be machined p Use the vector function r pM = r pM (u pM (sp ), υ pM (s p )) description, where, s p for the curve L p The arc length parameter;

[0058] (2) Surface active frame passing through the tool surface;

[0059] S ...

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Abstract

The invention discloses a general method for machining the complex curved surface of a non-spherical cutter in the multi-axis-linkage CNC manner. The method comprises the steps of (1) designing the curved-surface generating motion of a cutter relative to a workpiece: firstly, the curved surface of the cutter is described based on a vector function having continuous third-order partial derivatives, and then an envelope surface equation formula for the curved surface of the cutter is obtained with boundary conditions taken into consideration; secondly, a motion optimization functional extremum model formula of the cutter relative to the workpiece and having a minimum machining error, and a motion optimization functional extremum model formula of the cutter relative to the workpiece and having a maximum machining line width are obtained; finally, the above functional extremum model formulas are solved to respectively obtain a motion of the cutter relative to the workpiece at a given machining line width and a minimum curved-surface machining error, and a motion of the cutter relative to the workpiece at a maximum machining line width and a given limit error; (2) realizing the curved-surface generating motion of the cutter relative to the workpiece on a specific machine tool. According to the technical scheme of the invention, the machining accuracy and the machining efficiency of the curved surface are improved through fully developing the machining potential of the multi-axis-linkage CNC.

Description

technical field [0001] The invention relates to a general method for processing complex curved surfaces in wide rows, in particular to a general method for multi-axis linkage numerical control processing of aspherical cutters for complex curved surfaces. Background technique [0002] At present, ball-end cutters are widely used in CNC machining of complex curved surfaces. The ball nose cutter has strong processing adaptability and simple cutter position planning. Theoretically speaking, only three-axis linkage can process any complex curved surface. However, the ball end cutter cannot change the processing bandwidth and processing accuracy through the adjustment of the cutter position and attitude, so the processing accuracy and efficiency are relatively low. Using the multi-degree-of-freedom motion function of the five-axis and above multi-axis linkage CNC machine tool to properly adjust the tool position and attitude of the aspheric tool can obtain the optimal processing ...

Claims

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Application Information

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IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/35146
Inventor 周凯红李淑王聪毅
Owner GUILIN FUDA GEAR
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