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Forming Interface Damage Prediction Method Based on Friction Work and Numerical Simulation

A technology of numerical simulation and forming interface, which is applied in the field of stamping and forming, can solve the problem of undiscovered mold surface damage prediction, and achieve the effect of avoiding time

Active Publication Date: 2018-02-09
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After searching the existing literature, no public reports on the prediction of die surface damage in stamping forming based on the method of friction work and numerical simulation have been found so far

Method used

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  • Forming Interface Damage Prediction Method Based on Friction Work and Numerical Simulation
  • Forming Interface Damage Prediction Method Based on Friction Work and Numerical Simulation
  • Forming Interface Damage Prediction Method Based on Friction Work and Numerical Simulation

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Embodiment

[0093] In this embodiment, the stamping process is taken as an example. According to the known four kinds of simulated test conditions, the mold repair life (calculated by the number of stamping times that can be completed before the first stamping to the mold repair) and through the corresponding friction work Numerical solution to predict die life under other working conditions. The process parameters are shown in Table 1; the material parameters of the sheet metal and the die are shown in Table 2; the critical stamping times (ie, die life) under different working conditions are shown in Table 3.

[0094] Table 1. Parameter settings in the simulation model

[0095]

[0096] Table 2. Sheet and mold material properties

[0097]

[0098]

[0099] Table 3. Critical stamping times under different working conditions

[0100]

[0101] Specifically include the following steps:

[0102] first step

[0103] According to the known working conditions, according to the pa...

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Abstract

The invention discloses a forming interface damage prediction method based on friction work and numerical simulation, which includes the following steps: the first step is to establish a finite element model for numerical simulation according to given simulation test conditions and parameters, and calculate the simulated test forming The friction power dissipation of the interface; in the second step, according to the above calculation of the friction power dissipation W under each working condition, combined with the limit number of stamping times N when the surface damage of the stamping part reaches a certain depth in the simulation test, the N-W diagram is constructed ; The third step, according to the given actual production stamping conditions and parameters, numerically calculate the actual stamping forming interface friction power dissipation W, combined with the N-W diagram in step 2, directly predict the surface damage of stamping parts under the actual stamping conditions conditions and allowable punching times. The invention realizes the prediction of surface damage by using numerical simulation to solve the method of friction dissipation between forming interfaces, which is a more economical, convenient and effective new prediction method.

Description

technical field [0001] The present invention relates to a method for predicting die wear in the field of stamping forming, specifically calculating the dissipation of frictional work on the stamping forming interface through numerical simulation technology, combined with the damage limit of the mold surface in the experiment, and realizing the prediction of stamping forming die wear in production . Background technique [0002] In engineering, stamping dies are important equipment for forming various thin-walled parts. However, with the demand for lightweighting of many thin-walled parts, advanced high-strength steel has become the material of choice for lightweighting due to its light weight, excellent crashworthiness and economy. However, due to its high strength level, greater blank-holding force is required during the forming process, resulting in high contact pressure and shear force at the interface between the steel plate and the mold, and a significant temperature r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 于忠奇赵亦希顾新建孙利
Owner SHANGHAI JIAOTONG UNIV