Machine tool rotating shaft geometry error six-circle identifying method based on measuring of ball bar instrument

A technology of geometric error and identification method, applied in measuring/indicating equipment, metal processing mechanical parts, metal processing equipment, etc., can solve problems such as lack of generality, and achieve good systematic results
CN104308657AActive Publication Date: 2015-01-28ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2015-01-28

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Abstract

The invention discloses a machine tool rotating shaft geometry error six-circle identifying method based on measuring of a ball bar instrument. The method comprises the following steps of determining six measuring positions of the ball bar instrument according to the type and position of a machine tool rotating shaft, obtaining the relation of the readings of the ball bar instrument at all positions and the geometry error of the rotating shaft according to the influence of the geometry error of the rotating shaft to the machine tool precision and in combination with the direction of the ball bar instrument at six measuring positions, obtaining an identifying matrix M of the geometry error of the rotating shaft, by combining each geometry error definition of the rotating shaft, obtaining an identifying formula of the geometry error of the rotating shaft, selecting appropriate coordinates for the six measuring positions to install the ball bar instrument, operating corresponding machine tool codes, obtaining the corresponding readings of the ball bar instrument at the six positions of the rotating shaft, substituting the readings of the ball bar instrument and the measuring position coordinates into the identifying formula of the geometry error of the rotating shaft, and obtaining all 10 geometry errors of each rotating shaft. The method is suitable for the rotating shafts in different types without principle error, the system entry is good, the measuring is convenient, and the identifying precision is high.
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Description

technical field

[0001] The invention relates to the technical field of numerical control machine tool design, in particular to a six-turn identification method for the geometric error of a machine tool rotation axis based on ballbar measurement. Background technique

[0002] With the improvement of processing accuracy requirements and workpiece complexity, the proportion of five-axis CNC machine tools in the manufacturing industry is increasing. The machining accuracy of the machine tool has a great influence on the quality of the workpiece, and it is an important criterion for measuring a machine tool. The geometric error has good repeatability and is stable for a long time, so it is easy to realize the compensation of the geometric error to improve the machining accuracy of the machine tool.

[0003] The geometric error model of CNC machine tool is the basis of geometric error compensation. These models can be used to predict and compensate the geometric error of the mach...

Claims

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