Plasticity forming technique regulation obtaining method based on numerical value simulation and policy-making tree algorithm

A technology of plastic forming and numerical simulation, applied in computing, electrical digital data processing, special data processing applications, etc., can solve problems such as difficulty in obtaining process rules, insufficient development and utilization of result data, etc., and achieve the goal of expanding knowledge sources and improving utilization value. Effect

Inactive Publication Date: 2005-08-10
澳汰尔工程软件(上海)有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to propose a new plastic forming process rule acquisition method based on numerical simulation and decision tree algorithm in view of the difficulty in obtaining process rules in the field of plastic processing and the lack of development and utilization of the result data generated by plastic forming simulation. Excavate a large amount of potential process knowledge contained in the

Method used

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  • Plasticity forming technique regulation obtaining method based on numerical value simulation and policy-making tree algorithm
  • Plasticity forming technique regulation obtaining method based on numerical value simulation and policy-making tree algorithm
  • Plasticity forming technique regulation obtaining method based on numerical value simulation and policy-making tree algorithm

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Embodiment

[0024] Deep drawing of box-shaped parts is a representative plastic processing process. The present invention takes figure 1 The box-shaped part shown is taken as an example for deep drawing. The sheet material is AKDQ steel plate. The mold consists of three parts: punch, die and blank holder. Drawbeads of equal length and depth are arranged on the four sides of the blank holder. The important process parameters considered in this embodiment include blank holder force, coefficient of friction between sheet and tool, distance of drawbead from centerline, length of drawbead and depth of drawbead. Concrete implementation steps of the present invention are as follows:

[0025] 1. Numerical simulation modeling and calculation of plastic forming process

[0026]The blank holder force, friction coefficient, distance between the drawbead and the center line, the length of the drawbead and the height of the drawbead are used as the conditional attributes (represented by BHF, FC, ODB...

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Abstract

The present invention relates to a flastic forming process rule obtaining method based on numerical simulationand decision tree algorithm. Said method mainly includes the following steps: firstly, creating numerical simulation defining decision attribute set for evaluating forming property, making defining decision attribute set for evaluating forming property, making numerical simulation test design to obtain plastic forming process information source, forming decision table, successively defining node of every level of decision tree to form initial decision tree, then pruning the initial decision tree so as to obtain the invented process rule. Said invention also provides the advantages and application field of said method.

Description

technical field [0001] The invention relates to a method for obtaining plastic forming process rules based on numerical simulation and decision tree (Decision Tree) algorithm, which is used for mining potential process rules from plastic forming numerical simulation results, and belongs to the technical field of knowledge engineering of plastic processing. Background technique [0002] Process rules are very important to guide the process design of plastic forming, and are the basis for establishing plastic processing expert system or other intelligent plastic forming process design systems. At present, the plastic forming process rules are mainly obtained through the existing process design manual and domain expert inheritance. However, the original process design manual cannot adapt to the ever-changing product structure update; inheriting the experience of domain experts requires good cooperation and hard work between knowledge engineers and domain experts, and largely de...

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Application Information

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IPC IPC(8): G06F17/30G06F17/50
Inventor 鼓颖红李大永尹纪龙王迎春
Owner 澳汰尔工程软件(上海)有限公司
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