Transactions of Materials and Heat Treatment

Title：Optimization on hydroforming parameters for tapered muffler tube based on response surface method

Authors： Wang Shuqiang1 Chen Haolei1 Qiao Jinmeng2 Chen Zhao1 Zhou You1

Unit： 1.School of Mechanical and Power Engineering Shenya ng University of Chemical Technology 2. Bluestar (Beijing) Chemical Machinery Co. Ltd.

KeyWords： tapered tube muffler response surface hydroforming orthogonal experiment

ClassificationCode：

year,vol(issue):pagenumber：2022,47(3):83-88

Abstract：

The appearance of tapered muffler tube improves the aerodynamic performance and acoustic performance of expansion chamber muffler, its inner surface has the characteristics of variable section and continuous smoothness. To improve its manufacturing efficiency, the method of producing tapered muffler tube by hydroforming process was proposed, which reduced the wall thickness and the weight of tapered muffler tube to improve the fuel economy for vehicle. Furthermore, for the hydroforming process, the influences of internal pressure of hydroforming, taper of tapered tube and friction factor on the forming were studied by combining the finite element simulation and the response surface optimization method. The optimal parameters are obtained: the internal pressure of hydroforming is 42.573 MPa, the taper is 16.890%, and the friction factor is 0.076. The qualified tapered tube products are obtained by experiments with the optimal parameters, which verifies the feasibility of hydroforming on tapered tubes. It proves that the finite element simulation combined with response surface optimization method can be used in optimization of hydroforming process for tapered muffler tubes.

Funds：

辽宁省自然科学基金资助项目（20170540722）

王树强（1978-），男，博士，副教授 E-mail：55965920@qq.com 通信作者：陈昊雷（1997-），男，硕士研究生 E-mail：15905275133@163.com

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