Automobile covering part sheet metal forming technology optimizing method based on STL grid feature recognition

Abstract

The invention discloses an automobile covering part sheet metal forming technology optimizing method based on STL grid feature recognition. The method comprises the following steps: firstly reading a part STL grid model to obtain part curve information, obtaining part shape features through the curve information, constructing a part feature tree according to a feature topological relation, classifying the features according to feature processing categories, and determining respective sheet metal forming technology for different features. According to the method, a process knowledge database is taken as a core, optimization for the part sheet metal forming technology is finally completed depending on the obtained feature tree and the sheet metal forming technology route of each feature parameter decision-making part under the mechanism support of knowledge reasoning, the features can be extracted from the automobile covering part sheet STL model automatically, and the sheet metal forming technology routes are designed, so that a large amount of repeated work of technologists can be reduced, the work efficiency is effectively improved, and the technology preparation time is shortened.

Description

technical field [0001] The invention belongs to the technical field of CAD / CAPP, and relates to a stamping process design of complex thin-plate parts such as automobile panels, in particular to a method for optimizing stamping process of automobile panels based on STL grid feature recognition, which can be obtained from CAD The structural features of the parts that affect the forming process design are extracted from the model and the stamping process design is quickly completed. Background technique [0002] The vast majority of automotive panels are formed by stamping. The forming process is often completed by a combination of drawing, punching, bending, flanging, and shaping. The process design process is very complicated. The traditional stamping process design of automobile panels is mostly completed by process designers relying on their own experience. Due to the different levels of process designers, it is often difficult to guarantee the design quality, and even the ...

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Problems solved by technology

[0005] In order to solve the problems of difficult acquisition of structural features, low stamping process design efficiency, and low degree of standardization in the existing stamping process design of automobile panel panels, the present invention provides an optimal stamping process for panel panels of automobiles based on STL grid feature recognition. method, it can quickly identify and extract the structural features of automobile panels, and complete the optimal design of the stamping process

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