Multi-axis system error modeling and measuring device and method based on optical free-form surface
A system error and measurement method technology, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of low measurement accuracy, limit large-scale promotion and application, increase the time for measuring geometric errors of machine tools, and reduce the cost of measurement , high-precision measurement, and easy operation
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[0032] Taking the multi-axis numerical control machine tool as an example, the present invention adopts an optical free-form surface as the strategy of measuring the standard part, and realizes the high-precision and low-cost measurement of the geometric error of the numerical control machine tool. The present invention will be described in further detail below according to the accompanying drawings and examples.
[0033] (1) Machine tool error modeling
[0034] The invention adopts the method based on the multi-body system theory to realize the establishment of the mathematical model of the geometric error of the machine tool. The five-axis CNC machine tool contains 5 relative moving bodies, and each moving body m will generate 6 errors T during the movement process mx , T my , T mz , R mx , R my and R mz . Among them, T represents the movement error, and R represents the rotation error. The first subscript m represents the name of the moving body, and m can be X guid...
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