Method and device for confirming effect of backlash countermeasures for press-formed products

一种确认装置、对策的技术，应用在机械压力/力控制、仪器、电数字数据处理等方向，能够解决无法恰当地评价成形条件变更的效果等问题
CN103747890BActive Publication Date: 2016-08-17JFE STEEL CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JFE STEEL CORP
Publication Date
2016-08-17

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Abstract

The present invention provides a method and device for confirming the effects of backlash countermeasures on press-formed products, which can easily and clearly confirm the effects of backlash countermeasures during press forming. The method for confirming the effect of backlash countermeasures according to the present invention is characterized in that the residual stress distribution of the molded object before parting is calculated using preset molding conditions, and the residual stress distribution of the molded object after parting is calculated based on the result. , Calculate the difference of residual stress distribution based on these results, similarly obtain the difference of residual stress distribution with changed forming conditions, and obtain the residual stress caused by the change of forming conditions according to the results of the difference of these residual stress distributions The amount of change in the distribution, and display it in a cloud map.
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Description

technical field

[0001] The present invention relates to, for example, techniques for reducing backlash in press forming of vehicle body structural materials constituting a vehicle body, and more particularly, to a method and apparatus for confirming the effect of changing forming conditions for reducing backlash. Background technique

[0002] In press forming, after the press-formed product is taken out from the die (after parting), the press-formed product recoils (elastically recovers), and a problem that the desired shape often occurs. The cause of backlash is known to be non-uniform residual stress distribution of the product before parting, and conventionally, numerical analysis methods such as the finite element method have been used to predict it.

[0003] Especially recently, in order to reduce development man-hours and costs, there is a tendency to start the design stage of studying the forming method of molded parts at the same time as the design stage of automobil...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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