Method for achieving reverse modeling by using post program

A technology of reverse modeling and programming, applied in the direction of program control, simulator, general control system, etc., can solve the problems of long cycle, digital model cannot be used as the basis for direct processing, and the design process is difficult

Active Publication Date: 2013-12-18
SHENYANG AIRCRAFT CORP
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Problems solved by technology

[0002] The process of product forward design starts from conceptual design to CAD modeling, NC programming, NC machining, and finally forms new products. It is long and costly, which is not conducive to product research and development, because it is impossible to fully predict what problems will arise in the design of the product. It is in this context that the reverse design method is naturally developed and formed.
[0003] The general reverse modeling method is to use a three-dimensional coordinate measuring machine to measure the shape of the inspection fixture and the sample, use the point

Method used

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  • Method for achieving reverse modeling by using post program

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Embodiment Construction

[0013] A method for reverse modeling of an application post-program, comprising the following steps:

[0014] 1) Use the CNC tool measuring instrument to accurately measure the tool and determine the tool parameters, because the post-program is attached to the shape of the tool, only by accurately inputting the tool parameters can the numerical model with the correct value be obtained in the subsequent simulation software;

[0015] 2) Input the measured tool parameters, wool parameters and coordinate system into the post-program, and substitute the post-program into the NC machining simulation system VERICUT software developed by CGTECH in the United States, and perform simulation demonstration through the Export Model function. Use the Export Model function to export the demonstration results to the IGES format file, which can obtain the digital model of the surface patch of the part to be processed;

[0016] 3) Open the IGES format file with Catia V5.0 software, convert the ...

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Abstract

The invention relates to a method for achieving reverse modeling by using a post program. The method includes the steps that first, cutter parameters are determined; second, the parameters are input to the post program and are substituted into a numerical control machining simulation system, and an IGES formatted file is output from a demonstration result by the aid of an Export Model function; third, CatiaV5.0 software is used for opening the IGES formatted file, and a curved surface piece digital analog is generated into a three-dimensional digital analog; fourth, the newly generated three-dimensional digital analog is substituted into VERICUT software, the post program is used for forming a cutter path on the newly generated three-dimensional digital analog, adjusting is carried out, and the three-dimensional digital analog which is the same as actual parts is generated. Based on the post program, reversal design is achieved in the method, the digital analog of parts to be processed is generated, the method is high in accuracy rate, strong in operability and reliable in technology, the design and development period of products is shortened, and the cost and the risk for developing new products of enterprises are lowered.

Description

technical field [0001] The invention relates to a reverse modeling method using post-program, which is used in numerical control processing of large structural parts lacking digital models. Background technique [0002] The process of product forward design starts from conceptual design to CAD modeling, NC programming, NC machining, and finally forms new products. It is long and costly, which is not conducive to product research and development, because it is impossible to fully predict what problems will arise in the design of the product. It is in this context that the reverse design method is naturally developed and formed. [0003] The general reverse modeling method is to use a three-dimensional coordinate measuring machine to measure the shape of the inspection fixture and the sample, use the point cloud function of CAD software to form the shape surface, and rely on the principle of simulation approximation of forming a line with points and then forming a surface with...

Claims

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Application Information

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IPC IPC(8): G05B19/4097
CPCY02P90/02
Inventor 石海
Owner SHENYANG AIRCRAFT CORP
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