Error compensation method of five-axis non-contact measuring machine
A non-contact, error compensation technology, applied in the field of error compensation, can solve problems such as geometric errors of two rotating axes, and achieve the effects of reducing measurement errors, reducing uncertainty, and improving measurement accuracy and measurement efficiency
Active Publication Date: 2021-02-19
BOZHON PRECISION IND TECH CO LTD
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Problems solved by technology
However, the geometric error compensation method of the above two types of engineering equipment only compensates the geometric error of the linear motion axis, while the five-axis non-contact measuring machine also faces the problem of geometric errors in the two rotating axes.
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Embodiment 1
[0034] Such as figure 1 As shown, this embodiment includes the following steps:
[0035] Data acquisition step: measure the standard workpiece with a probe with a laser displacement sensor to obtain the initial coordinate data of the standard workpiece, the initial coordinate data of the standard workpiece includes the initial three-dimensional coordinates (x, y, z) of any point on the workpiece and the corresponding Probe space pose (x, y, z, a, c);
[0036] Single error identification step: Calibrate the geometric error between the linear motion pair, rotary motion pair and motion pair of the five-axis non-contact measuring machine, obtain 21 errors of the linear axis and 24 errors of the rotary axis, build a single error identification model, and then Perform single-item error identification on the initial coordinate data of the standard workpiece to obtain single-item error data;
[0037] Comprehensive error identification steps: take the five-axis non-contact measuring ...
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The invention relates to an error compensation method for a five-axis non-contact measurement machine, belonging to the technical field of error compensation. The error compensation method for the five-axis non-contact measurement machine comprises steps of: data collection; single error identification; comprehensive error identification; and error compensation; wherein the data collection step comprises substeps that a probe head measures a standard workpiece to obtain 3D coordinates (x, y, z) of any point of the workpiece and a spatial position (x, y, z, a, c) of the probe head; the single error identification step comprises substeps of constructing a single error identification model and identifying a single error of the standard workpiece so as to obtain single error data; the comprehensive error identification step comprises substeps of constructing an ideal measurement motion model from a workpiece chain to a probe head chain, correcting by using single error data based on rigidbody kinematics so as to obtain a comprehensive error identification model and comprehensive error data; and the error compensation step comprises substeps of performing error compensation on 3D coordinate data of a to-be-tested workpiece according to comprehensive error data of the standard workpiece so as to obtain corrected XYZ 3D coordinate data of the to-be-tested workpiece. The method can improve measurement accuracy and measurement efficiency.
Description
technical field [0001] The invention relates to a technology in the field of error compensation, in particular to an error compensation method for a five-axis non-contact measuring machine. Background technique [0002] The five-axis non-contact measuring machine integrates five-axis linkage and non-contact measurement, and provides a complete measurement solution for the non-contact measurement requirements of complex curved surfaces / heterogeneous surfaces. This type of equipment is mainly used for auto parts, aircraft In the fields of engine parts, mobile phone 3D glass, precision molds, etc., it can provide measurement requirements such as size measurement and 3D size cloud image construction. [0003] Measurement accuracy is an important performance index of five-axis non-contact measuring machines, and the geometric error of the measuring machine accounts for more than 50% of the overall error of the whole machine. Therefore, geometric error compensation is the most con...
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IPC IPC(8): G01B11/00
CPCG01B11/00G01B11/005
Inventor 史文浩孟健陈良锋于福翔史军新
Owner BOZHON PRECISION IND TECH CO LTD