Compensation Method for Thermal Deformation Error of Articulated Coordinate Measuring Machine
A coordinate measuring machine and error compensation technology, applied in the field of temperature compensation, can solve the problem of less research on the thermal deformation error of the whole machine
Active Publication Date: 2018-12-14
BEIJING INFORMATION SCI & TECH UNIV
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Research focuses on simulation analysis, model simplification, etc., and there are few studies on the thermal deformation error of the whole machine
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[0017] The objects and functions of the present invention and methods for achieving the objects and functions will be clarified by referring to the exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The essence of the description is only to help those skilled in the relevant art comprehensively understand the specific details of the present invention.
[0018] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps.
[0019] figure 1 A schematic diagram of an articulated coordinate measuring machine. The articulated coordinate measuring machine 100 includes: a base 110 , three measuring arms 107 , 108 , 109 , rotating joints 101 , 102 , 103 , 104 , 105 , 106 and a probe 111 . On the base 110, six rota...
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The invention provides a thermal deformation error compensation method for an articulated-type coordinate measuring machine, and the method comprises the following steps: 1), building a mathematic mode of the impact on structural parameters of the articulated-type coordinate measuring machine from temperature; 2), placing the articulated-type coordinate measuring machine in a constant temperature room with the adjustable temperature, wherein the room temperature is set as 15 DEG C for 2 hours; 3), measuring a designed dedicated calibration plate through the articulated-type coordinate measuring machine; 4), adjusting the temperature of the constant temperature room to 20 DEG C for two hours, and then carrying out the measurement of the calibration plate again; 5), continuing to increase the temperature, and carrying out measurement tests at intervals of 5 DEG C till the temperature rises to 40 DEG C; 6), calculating the errors of each group of data according to a nominal value of the dedicated calibration plate, and calibrating the structural parameters under each temperature through a self-calibration method for the structural parameters of the articulated-type coordinate measuring machine; 7), measuring the calibration plate again in the constant temperature room under different temperature gradients, so as to verify a compensation result of f(T).
Description
technical field [0001] The invention relates to a temperature compensation technology of a coordinate measuring machine, in particular to a thermal deformation error compensation method of an articulated coordinate measuring machine. Background technique [0002] Articulated coordinate measuring machine is a multi-degree-of-freedom non-orthogonal three-dimensional coordinate measuring machine, usually with 6 degrees of freedom. It is modeled on human joints, and consists of three measuring arms and a measuring head connected in series through six rotating joints. Compared with the traditional orthogonal three-coordinate measuring machine, the joint-type coordinate measuring machine has the characteristics of large measurement range, convenience and flexibility, and simple mechanical structure. However, because articulated coordinate measuring machines are often used in industrial sites such as workshops, the temperature of the working environment varies greatly. Affected b...
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IPC IPC(8): G01B21/04
CPCG01B21/04
Inventor 祝连庆冯超鹏潘志康郭阳宽董明利娄小平李伟仙
Owner BEIJING INFORMATION SCI & TECH UNIV