Journal of South China University of Technology (Natural Science Edition) ›› 2018, Vol. 46 ›› Issue (7): 100-108.doi: 10.3969/j.issn.1000-565X.2018.07.014

• Mechanical Engineering • Previous Articles     Next Articles

A 3D Die Compensation Method Based on Interpolation Solution and FE Simulation

 ZHANG Xueguang1，2 LIU Chunguo 1 LIANG Jiye 2   

  1.  1． Ｒolling Forming Ｒesearch Institute，Jilin University，Changchun 130022，Jilin，China; 2． Engineering Planning and Development Department，CＲＲC Changchun Ｒailway Vehicles Co. ，Ltd. ，Changchun 130022，Jilin，China
  • Received:2017-11-15 Revised:2018-03-05 Online:2018-07-25 Published:2018-06-01
  • Contact: 张学广( 1989-) ，男，博士，高级工程师，主要从事车体制造工艺研究 E-mail:zxg13@mails.jlu.edu.cn
  • About author:张学广( 1989-) ，男，博士，高级工程师，主要从事车体制造工艺研究
  • Supported by:
     Supported by the National Natural Science Foundation of China ( 51575231)

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Abstract: Die compensation is the major method to suppress springback for sheet metal forming． Aiming at the limitations of iterative correction method，a die surface compensation method based on interpolation solution and finite element ( FE) simulation is proposed． By defining the functional relation between work-piece shape error and die surface deviation，the ideal die compensation quantity is solved in the work-piece forming process． In FE simulation，the grid nodes are reversely adjusted along the node connection direction，and the compensated node group is reversely processed to realize die compensation surface reconstruction． This method simplifies the 3D die surface compensation process，realizes the independent and inhomogeneous compensation in different positions， and ensures the die smoothness． The roof covering skin of railway train is chosen as the research object，the springback and shape error with different die compensation surfaces are compared． The obtained ideal die surface is utilized to guide the forming experiment，and the result shows that the formed work-piece meets the requirement of precision．

Key words: die compensation, springback value, forming, shape error, numerical simulation

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