A Method for Aligning the Machining and Inspection Coordinate System of a Large-Aperture Plane Mirror
A technology for processing coordinate systems and plane mirrors, applied to measuring devices, instruments, etc., to achieve the effects of ensuring product quality, improving production efficiency, and avoiding repeated iterative comparisons
Active Publication Date: 2019-06-07
THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to aim at the shortcoming that the manufacture of the existing large-aperture plane mirror is finally completed through processing and detection iterative convergence, and to provide a large-diameter plane mirror processing and detection coordinate system alignment method, including the following step,
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[0026] The present invention will be further described below in conjunction with embodiment:
[0027] A method for aligning the processing and detection coordinate system of a large-aperture plane mirror, such as Figure 4 , is a flow chart of the steps of the method of the present invention, comprising the following steps,
[0028] Target setting steps: such as figure 1 , three targets are pasted on the mirror surface of the large-aperture plane mirror 4, the first target 1, the second target 2, and the third target 3, each target is circular, and the circular target can be used to measure its Position coordinates in the processing coordinate system (that is, the processing equipment coordinate system) and the detection coordinate system (that is, the detection instrument coordinate system);
[0029] Steps of measuring the detection position coordinates corresponding to each target: such as figure 2 , the detection instrument 5 is a three-coordinate measuring instrument, ...
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The invention discloses a large-aperture planar reflecting mirror processing and detection coordinate system alignment method. The method comprises the following steps of setting a target; measuring a detection position coordinate corresponding to each target; measuring a processing position coordinate corresponding to each target; carrying out detection position coordinate conversion; and fitting. Through pasting i targets on a large-aperture planar reflecting mirror surface, a detection apparatus is used to measure the detection position coordinate corresponding to each target and a large-aperture planar reflecting mirror is moved to processing equipment. A processing probe is used to measure the processing position coordinate of each target. Mathematical conversion is performed on a relation of a measurement result of the target in a processing coordinate system and a measurement result of the target in a detection coordinate system so as to acquire a coordinate result after conversion. A mathematical method is used to carry out fitting so as to acquire a conversion relation of the processing coordinate system and the detection coordinate system. A surface shape detection result is converted into the processing coordinate system, and alignment of the processing coordinate system and the detection coordinate system is performed so that production efficiency is increased and simultaneously product quality is guaranteed.
Description
technical field [0001] The invention relates to a method for aligning a coordinate system for processing and detecting a plane mirror, in particular to a method for aligning a coordinate system for processing and detecting a large-diameter plane mirror. Background technique [0002] With the development of science and technology, large-aperture flat mirrors are increasingly used in large-aperture optical systems, such as space telescopes, vehicle-mounted optical systems, and remote sensing satellites. The manufacture of large-aperture flat mirrors is finally completed through iterative convergence of processing and inspection, that is, one round of processing and one round of inspection, reprocessing and inspection, repeated iterative comparison of processing and inspection data until the inspection results of the mirror meet the acceptance criteria. The processing is completed by CNC machine tools, and the inspection uses different inspection instruments, such as three-coor...
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IPC IPC(8): G01B21/00
CPCG01B21/00
Inventor 闫力松李强姜永亮许伟才胡黎明王玉雷胡海力兰硕杨小威
Owner THE GENERAL DESIGNING INST OF HUBEI SPACE TECH ACAD