On-site measurement method and system for composite material mould molded surface accuracy of antenna reflector

An antenna reflector and mold profile technology, which is applied to measurement devices, instruments, optical devices, etc., can solve the problems of large influence of measurement accuracy error, many times of transportation of composite molds, and long time-consuming point-by-point touch measurement. The effect of fewer operation steps, improved data processing efficiency, improved processing efficiency and processing accuracy

Active Publication Date: 2019-07-12
BEIJING SATELLITE MFG FACTORY
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Problems solved by technology

[0004] The technical problem solved by the present invention is to propose a composite mold for antenna reflector in view of the disadvantages of the prior art, such as many times of transporting the composite mold,

Method used

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  • On-site measurement method and system for composite material mould molded surface accuracy of antenna reflector
  • On-site measurement method and system for composite material mould molded surface accuracy of antenna reflector
  • On-site measurement method and system for composite material mould molded surface accuracy of antenna reflector

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Embodiment Construction

[0044] An in-situ measurement method for the surface accuracy of an antenna reflector composite mold, the specific steps are as follows:

[0045] (1) Obtain the three-dimensional model for making the composite material mold to be measured, and establish the workpiece coordinate system of the three-dimensional model, and preset the points to be measured on the surface of the three-dimensional model;

[0046] (2) According to step (1), preset the points to be measured to determine the measurement path of the six-degree-of-freedom robot in the workpiece coordinate system;

[0047] (3) After assembling the composite mold to be measured in place, establish a six-degree-of-freedom robot base coordinate system, obtain the coordinate transformation matrix of the robot base coordinate system and the workpiece coordinate system, and convert the measurement path obtained in step (2) into the base coordinate system The measuring path of the target ball;

[0048] (4) According to the targ...

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Abstract

The invention discloses an on-site measurement method and system for the composite material mould molded surface accuracy of an antenna reflector, and is used for measuring the molded surface accuracyin the machining process of the carbon fiber composite material mould of the antenna reflector. On the basis of the quick acquisition and analysis of the measurement data of a laser tracker and a robot integrated measurement system, the method and the system solve a transportation problem between the processing and the detection of the composite material mould by aiming at the defects in the prior art that the transportation frequency of the composite material mould is high and measurement accuracy is greatly affected by machine tool axial system errors in a measurement process, meanwhile, measurement equipment independent of the machine tool is used for enabling the measurement evaluation of the composite material mould molded surface to be objective and real, and the problem that point-to-point contact measurement wastes long time is solved through the efficient and automatic sampling of the point cloud of the paraboloid molded surface of the mould.

Description

technical field [0001] The invention relates to an in-situ measurement method and system for the surface precision of an antenna reflector composite mold, and belongs to the field of precision measurement. Background technique [0002] With the large-aperture satellite antenna system greatly improving the profile accuracy requirements of the profile antenna reflector, the requirements for its molding mold are also increased accordingly, and the thermophysical properties of composite molds and antenna reflector products are naturally consistent It is the preferred mold for forming large-diameter antenna reflectors. The development method of large-diameter composite molds is mainly through direct molding of resin master molds, and it is difficult to further improve the molding accuracy after reaching 0.05mm RMS. Therefore, it is necessary to further improve the surface accuracy of composite molds through grinding and polishing, that is, using The measurement data guides the g...

Claims

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Application Information

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IPC IPC(8): G01B11/00
CPCG01B11/005G01B11/007
Inventor 赵婕于望竹蔡子慧杨继之倪爱晶刘佳郭庆黄羚王小瑞杨纯
Owner BEIJING SATELLITE MFG FACTORY
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