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Punching part sample researching method

A technology of stamping parts and similarity, applied in the process design of new parts and retrieving similar stamping parts, can solve the problems of large process differences, similar processes, rough and simple, etc.

Inactive Publication Date: 2007-10-10
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although method 1 can realize the retrieval of similar instances of blanking parts, each attribute uses 1 and 0 to indicate whether it matches or does not match, which is too rough and simple
Although methods 2 and 3 can be applied to the retrieval of stamping parts, they only consider the similarity in shape and do not consider other information related to the process. They may not be able to refer to the process plan of the retrieved stamping parts, because the shape is the most similar, and the process is not necessarily the best. resemblance
For example, different materials may lead to stamping parts of the same three-dimensional solid model, and the process is very different

Method used

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Embodiment Construction

[0052] The content of the present invention is described below in conjunction with embodiment.

[0053] As shown in Figure 3, there is a stamping part to be designed for the stamping process, that is, the new part in Figure 3. There are hundreds of old parts whose stamping process has been successfully formulated in the example library, and now only 11 of them are listed, namely old parts 001 to 011 in Figure 3. Using the method in the present invention to search, the new part and which old part have the highest similarity from the perspective of technology. The specific process is briefly described as follows:

[0054]Firstly, the features and inter-feature constraints of the new part are extracted. The new part has 4 faces, 3 bends, 2 flipped holes, 8 round holes, 2 rectangular holes and 1 protrusion. These features and their planes are stored in a table. The inter-feature constraints include 2 precision constraints, which are stored in a table. Then perform the topologi...

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Abstract

An indexing method of punched element includes picking up character and inter-character constraint from 3-D model of punched element, obtaining thickness and intensity as well as hardness of material according to material information table of punched element and calculating out similarity of new and old punched elements based on process similar point of view.

Description

technical field [0001] The invention belongs to the field of machining, and relates to information retrieval and stamping methods, in particular to a method for retrieving similar stamping parts so as to better imitate the stamping process of the retrieved stamping parts to carry out process design of new parts. Background technique [0002] Stamping process design is characterized by weak theory and strong experience, and it is generally suitable to use Case Based Reasoning (CBR) to design process schemes. CBR uses existing similar examples to solve problems, so how to retrieve similar examples becomes one of the key technologies for applying CBR. Aiming at the problem of instance retrieval, a variety of methods have been proposed at home and abroad, mainly including: nearest neighbor method, induction method and knowledge-based method. However, there are not many literatures successfully applied to stamping instance retrieval. Similar stampings have similar stamping proc...

Claims

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Application Information

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IPC IPC(8): G06F17/30G06F17/50
Inventor 李爱平朱文博刘雪梅徐立云张为民胡永亮张丰刘建文刘长正王东立
Owner TONGJI UNIV
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