Transactions of Materials and Heat Treatment

Title：Lightweight design of open prebending machine based on response surface methodology

Authors： Liu Zhigang Guan Dianzhu Bai Shuowei Zhang Kaituo

Unit： Qingdao University

KeyWords： pre-bending machine lightweight design response surface methodology ANSYSWorkbench FEA

ClassificationCode：TH122；TP319

year,vol(issue):pagenumber：2018,43(10):135-140

Abstract：

For an open hydraulic prebending machine with nominal force 22000 kN, the design of its body structure was tested before production to meet the requirements of deformation and stress, and based on these the safety factor was reduced to optimize the structure and carry out lightweight design, so that its 3D model was simplified to a certain degree. Then, the static analysis of the prebending machine was conducted by FEA software ANSYSWorkbench, and the location of the structure with the maximum deformation and stress concentration distribution was determined. Furthermore, four structural dimensions of side plate and rib plate for the upper beam weldment and the base weldment influencing on the maximum stress of the prebending machine greatly were set as parameters, the minimum weight was taken as the optimization objective to constrain the maximum stress, the maximum deformation and the structure size, and the optimization mathematical model of the objective function was established. Finally, the lightweight design of the prebending machine was carried out by the response surface methodology, and fortynine groups of experimental data were generated by the central composite design. After screening and optimization, the results show that the prebending machine weight reduces 8330 kg, and the stress and deformation meet the requirements of design and material.

Funds：

国家自然科学基金资助项目(71701109)；山东省自然科学基金资助项目(ZR2017BG003)

刘志刚（1992-），男，硕士研究生，E-mail：lzg_178@163.com；通讯作者：管殿柱（1969-），男，硕士，教授，E-mail：gdz_zero@126.com

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