Measuring method and system for position related geometric error of rotary table of numerically-controlled machine tool
A technology of geometric error and CNC machine tools, which is applied in the field of CNC machine tools, can solve the problems of inconsistent identification matrix dimensions, large matrix condition numbers, and sensitivity to measuring instrument errors, etc.
Inactive Publication Date: 2018-06-29
GUANGDONG UNIV OF TECH
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[0003] In the prior art, the comprehensive geometric error of the turntable is measured by placing the ballbar in six positions, and then the position-related geometric error is identified, that is, the three position-related angular geometric errors and the three position-related displacement geometric errors are simultaneously analyzed. However, the method used in the prior art has the phenomenon of inconsistency in the dimensions of the identification matrix, which easily leads to a large condition number of the matrix, which makes the identification method sensitive to the error of the measuring instrument
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[0060] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0061] see below figure 1 , figure 1 It is a flow chart of a method for measuring position-related geometric errors of a turntable of a numerically controlled machine tool provided by an embodiment of the present application.
[0062] Specific steps can include:
[0063] S101: Select three fixed points on the turntable and the moving shaft respecti...
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The invention discloses a measuring method for a position related geometric error of a rotary table of a numerically-controlled machine tool. The measuring method comprises the following steps: selecting three fixed points on each of the rotary table and a moving shaft, determining a first type of a fixed position according to the six fixed points; rotating the rotary table and recording a first reading of a ball bar, and calculating a position related displacement geometric error; changing the fixed position of a second ball base, to obtain a second type of the fixed position; rotating the rotary table and recording a second reading of the ball bar; and according to the second reading and the position related displacement geometric error, calculating a position related angle geometric error. The method is capable of shielding the mutual interference of each displacement and angle error in the position related geometric errors, and improving the measurement accuracy of the position related geometric errors. The invention further discloses a measuring system for the position related geometric error of the rotary table of the numerically-controlled machine tool, a computer readable storage medium and a measuring device for the position related geometric error of the rotary table of the numerically-controlled machine tool, and has the above beneficial effects.
Description
technical field [0001] The invention relates to the field of numerical control machine tools, in particular to a method and system for measuring position-related geometric errors of turntables of numerical control machine tools, a computer-readable storage medium, and a device for measuring position-related geometric errors of turntables of numerical control machine tools. Background technique [0002] The position-related geometric errors of the multi-axis CNC machine tool turntable include 3 position-related angular geometric errors and 3 position-related displacement geometric errors, and a total of 6 position-related geometric errors that change with the rotation of the rotating shaft. [0003] In the prior art, the comprehensive geometric error of the turntable is measured by placing the ballbar in six positions, and then the position-related geometric error is identified, that is, the three position-related angular geometric errors and the three position-related displac...
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IPC IPC(8): B23Q17/00G01B21/00
CPCB23Q17/00G01B21/00
Inventor 夏鸿建彭伟超罗世阳欧阳祥波陈新度
Owner GUANGDONG UNIV OF TECH