Transactions of Materials and Heat Treatment

Title：Investigation on cracking sensitive factors of tailor welded blanks' inner door

Authors： HU Qiao-sheng1 LIN Jian-ping1 XING Dan-ying1 GUO Rui-quan2 BAO Wen-hua3 (1.College of Mechanical Engineering Tongji University Shanghai 201804 China 2.Baosteel Group Corporation Lit. Shanghai 201900 China 3. Shanghai Volkswagen Shanghai 201805 China)

Unit：

KeyWords： tailor welded blanks inner door stamping cracking

ClassificationCode：TG456.7

year,vol(issue):pagenumber：2009,34(6):47-51

Abstract：

Cracking near the welded seam is one of the major quality problems in the stamping process of tailor welded blanks (TWB).This problem is ascribed to the excessive deformation in the weaker side of the base metals which may be caused by unreasonable structure of parts and illogical parameters of stamping process. The possible factors of cracking were analyzed taking TWB inner door of some car as an example and a finite element model which could reflect the true conditions was created. The influence laws of possible factors on cracking risk area in the production were studied by numerical simulation,which could provide some references for dealing with cracking problems in the stamping process. The consideration for the impact of local character of the die was highly recommended in the design phase and qualified parts could be got with appropriate die radii and drawbeads in the stage of die debugging and manufacture. Also,the shape and initial position of blanks play an important part in the forming quality of TWB.

Funds：

高等院校博士学科点专项科研基金(20070247025)

Reference：

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