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Plasticity forming numerical value emulation method

A numerical simulation and plastic forming technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of incomplete basic software parameters, shorten simulation time, low simulation accuracy, etc., to improve the level of numerical simulation, promote The effect of promoting application and reducing technical requirements

Inactive Publication Date: 2010-01-27
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to propose a new knowledge-based plastic forming numerical simulation method for the current numerical simulation of metal plastic forming that requires high technical level of personnel, low simulation accuracy, and incomplete basic parameters of the existing software. Plastic forming numerical simulation module, which has a plastic forming numerical simulation knowledge base. The numerical simulation module is independent of the plastic forming numerical simulation software and can run independently. The preprocessing parameters of successful cases can be called out from the knowledge base and directly input into the plastic forming The forming numerical simulation software can also directly fill in the pre-processing parameters with the help of the knowledge base, thereby reducing the technical requirements for the simulation personnel, shortening the simulation time, and helping to improve the simulation level

Method used

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  • Plasticity forming numerical value emulation method
  • Plasticity forming numerical value emulation method
  • Plasticity forming numerical value emulation method

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Effect test

Embodiment 1

[0021] Back extrusion is a typical plastic processing technology. The present invention takes figure 2 The piston extrusion shown is an example. The material is 20Cr, and the dimensions are: Φd 1 =40mm, Φd 2 = 30mm, h 1 = 43mm, h 2 = 50mm, R = 2mm.

[0022] When extruding, the cylindrical blank is formed at room temperature through the reverse extrusion process. The mold mainly includes a punch and a die. Simulation software adopts U.S. DEFORM software, and concrete steps of the present invention are as follows:

[0023] 1. Numerical simulation case retrieval

[0024] Based on the clues of part shape features - cylinder shape, size features, material features - 20Cr, process features - cold extrusion, reverse extrusion, in the numerical simulation knowledge base of the knowledge-based plastic forming numerical simulation module Retrieve, retrieve whether there are similar numerical simulation cases.

[0025] 2. Pre-processing parameter input

[0026] After searchin...

Embodiment 2

[0043] The piston extrusion shown in Figure 3 is a special-shaped piston, and the material is 20CrMn. When extruding, the cylindrical blank is formed at room temperature through a composite cold extrusion process. The mold mainly includes two punches and a die. Simulation software adopts U.S. DEFORM software, and concrete steps of the present invention are as follows:

[0044] 1. Numerical simulation case retrieval

[0045] Search in the numerical simulation knowledge base in the knowledge-based plastic forming numerical simulation module with the clues of part shape features - cylindrical, fork, material features - 20CrMn, process features - composite extrusion, cold extrusion , to retrieve whether there are similar numerical simulation cases.

[0046] 2. Pre-processing parameter input

[0047] After searching, no similar cases were found in the knowledge base, so the introduction of the pre-processing parameters was queried in the knowledge base, some similar cases, after...

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Abstract

The method comprises: the questionable feature is inputted into a knowledge-based plastic-forming numeric value simulating module; using the numeric value to simulate similar case in knowledge base; if there is a similar case, the pre-processing file of the case is directly inputted into the plastic-forming numeric value simulating software to make analysis; if there is no similar case, the numeric value simulating knowledge base is used to fill in the numeric value simulating pre-process parameters, and then transmits it to the numeric value simulating software to make analysis.

Description

technical field [0001] The invention relates to a numerical simulation method for plastic forming, which is used for numerical simulation analysis of plastic forming processing of metal parts, and belongs to the technical field of plastic forming. Background technique [0002] Numerical simulation of plastic forming of metal parts using finite element has become an effective tool for process design and mold design. Through numerical simulation, metal flow process and forming defects, stress, strain, damage, temperature field distribution law, and even organizational change law can be predicted. , can predict the forming load, mold force and temperature field, which has great reference value for process and mold design. It changes the design process of traditional technology, reduces the number of mold tests, greatly improves the design efficiency and level, and reduces the Mold, product development costs. In the numerical simulation of metal plastic forming, after the geome...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 黄少东刘川林赵祖德张志明
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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