A Virtual Assembly Method for Lever System
A virtual assembly and lever technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as low efficiency, achieve intuitive results, and shorten the test preparation period.
Active Publication Date: 2016-12-07
CHINA AIRPLANT STRENGTH RES INST
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Based on this, Li Weixue et al. discussed the "Product Automatic Assembly Method Based on CATIA V5 Secondary Development" (2010,48(1):40-42) in the "Machinery Manufacturing" magazine. The document is based on the component axis coordinate system By establishing the constraint relationship of the axis system between parts (such as collinear constraint, coplanar constraint and angle constraint, etc.) to achieve the coincidence of coordinate axes to achieve the purpose of virtual assembly. It is necessary to recursively search for part models and reference elements on the assembly model, which is suitable for assemblies involving fewer parts in the assembly model. When there are many assembled models, the efficiency is low
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[0050] The present invention will be further described below in conjunction with accompanying drawing:
[0051] see figure 1 , which is a flow chart of the virtual assembly method of the lever system of the present invention.
[0052] Based on the establishment of the basic equipment library, the present invention uses the CATIA secondary development technology CAA for development, and realizes the rapid virtual assembly of the equipment used in the lever system through interface access and function calls, and only needs to call the corresponding program when assembling The virtual assembly of the lever system can be completed, and the corresponding assembly product model file can be formed.
[0053] Before starting the virtual assembly, it is necessary to build the basic equipment library, that is, the general equipment library and the special lever library. The specific method is as follows:
[0054]1) General equipment library: Start the CATIA software, enter the Part Des...
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The invention belongs to a technique of structural strength test of an aircraft, and relates to a lever system virtual assembly method used when the structural strength test of the aircraft is conducted. The method is used for development by mainly using CATIA secondary development technology CAA, rapid virtual assembly of equipment used by the level system is achieved by means of port accessing and calling of a function of the lever system, virtual assembly of the lever system can be rapidly completed only by calling an executing program during assembly, and a corresponding assembly model file is formed. The lever system virtual assembly method has the advantages that interactive operation can be conducted on the basis of the CATIA environment without entering a CATIA interface, complex restraint building does not exist during virtual assembly, and virtual assembly of the lever system can be completed within short time. Design is more visual compared with original two-dimensional test, loading circumstances of various test working conditions can be checked conveniently, it is avoided that redesign is needed after interference or unreasonable design is found during assembly in a physical testing site, and the method is beneficial for shortening a preparing cycle of the test.
Description
technical field [0001] The invention belongs to the aircraft structure strength test technology, and relates to a lever system assembly method during the aircraft structure strength test. Background technique [0002] The lever system refers to the loading system composed of the lever and its connecting equipment during the loading of the aircraft structural strength test. At present, the design of the lever system in the process of experimental design still relies on the automatic software of the lever system developed in the 1980s based on the Dos environment. The software is invoked by inputting the tape load to obtain a two-dimensional lever diagram based on AutoCAD. The construction of the test site is carried out, but because the two-dimensional method is used, the graphical output results are not intuitive enough, and it is not easy to find out if interference and collision occur during the design process. Once such a situation occurs, the design needs to be modified ...
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IPC IPC(8): G06F17/50
Inventor 黄河张生贵刘钢段世慧
Owner CHINA AIRPLANT STRENGTH RES INST