锻压技术

基于响应面法的锥形消声管液压胀形参数优化

英文标题：Optimization on hydroforming parameters for tapered muffler tube based on response surface method

分类号：

出版年,卷(期):页码：2022,47(3):83-88

摘要：

锥形消声管的出现提高了扩张室式消声器的空气动力学性能以及声学性能，该类管件的内曲面具有变截面和连续光滑的特点，为提高锥形消声管的制造效率，提出了使用液压胀形工艺生产锥形消声管的方法，使用该技术可以减小锥形消声管壁厚、降低管件重量，从而提高车辆的燃油经济性。针对液压胀形工艺，采用有限元仿真结合响应面优化的方法，研究了胀形内压力、锥形管锥度与摩擦因数对成形结果的影响。得到最优参数为：胀形内压力为42.573 MPa、锥度为16.89%、摩擦因数为0.076。采用最优参数进行实验得到了合格的锥形管产品，验证了液压胀形锥形管的可行性，证明了运用有限元仿真结合响应面优化方法可对锥形消声管的液压胀形过程进行优化。

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.

基金项目：

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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