A Contour Error Estimation Method for Three-Axis CNC Machine Tool

A contour error and CNC machine tool technology, applied in program control, computer control, general control systems, etc., can solve problems such as excessive calculation, poor real-time performance, and limited versatility of estimation methods, so as to achieve small calculation and reduce estimation Complex, wide-ranging effects

CN107544430BActive Publication Date: 2020-02-14HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-02-14

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Abstract

The invention belongs to the precise manufacturing technology field and discloses a contour error evaluation method for a triaxial numerical control machine tool. The method comprises steps that (a),an ideal processing reference track is planned, a three-dimensional coordinate of each processing point of the reference track after interpolation is stored, and a three-dimensional coordinate of eachprocessing point of an actual processing track within each sampling period is monitored and stored; (b), reference position points of the reference track closest to the actual processing points are acquired; and (c), according to different position relationships between the closest reference position points and adjacent points of the closest reference position points, a contour error is evaluatedthrough employing different methods according to different situations. The method is advantaged in that the evaluation process needs no parameter information and no curvature information of the idealprocessing reference track, the method is suitable for occasions with relatively large curvature in the processing process, realization difficulty is low, computational complexity is small, the consumption time is short, timeliness is realized, and the application scope is wide.
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Description

technical field

[0001] The invention belongs to the technical field of precision manufacturing, and more specifically relates to a contour error estimation method of a three-axis numerically controlled machine tool. Background technique

[0002] In recent years, with the rapid development of the manufacturing industry, the processing parts are becoming more and more sophisticated and complex, which makes the processing requirements of CNC machine tools in the field of precision manufacturing gradually develop towards high precision. The so-called high precision generally refers to high contour machining accuracy. The machining accuracy level of CNC machine tools directly reflects the technical level of national equipment manufacturing.

[0003] In order to reduce the contour error in the NC machining process and improve the contour accuracy of the machined workpiece surface, a common method is to design a corresponding contour error controller based on the contour error inf...

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0036] figure 1 It is an implementation flowchart of contour error estimation in the three-axis numerically controlled machine tool (CNC) machining process constructed according to the preferred embodiment of the present invention, as figure 1 As shown, the present invention constructs the method for the contour error estimation model in the three-axis numerical control machining process compri...