Transactions of Materials and Heat Treatment

Title：Optimization on ultrasonic vibration extrusion process parameters based on NSDBO algorithm

Authors： Jia Haili Sun Rui

Unit： Tianjin University of Technology and Education

KeyWords： ultrasonic vibration extrusion processing surface hardness residual stress NSDBO algorithm predictive models multi-objective optimization

ClassificationCode：TG376.1

year,vol(issue):pagenumber：2024,49(6):134-140

Abstract：

In order to obtain the optimal combination of surface hardness and residual stress, the orthogonal experiment of 304 stainless steel workpiece was carried out by ultrasonic vibration extrusion process to obtain the processing data, and the prediction models of surface hardness and residual stress were established respectively by PSO-SVR algorithm and linear regression method. Then, the multi-objective optimization design on the processing parameters of spindle speed, feeding speed, ultrasonic power and static extrusion amount was conducted by NSDBO algorithm. Finally, the validity of the process parameters combination obtained from the solution was experimentally verified. The results show that the optimal balance between surface hardness and residual stress is obtained as the residual stress range of -373.175--487.436 MPa and the hardness range of 10.837-15.689 HRS when the spindle speed is 115-347 r·min-1, the feeding speed is 0.056-0.130 mm·r-1, the static extrusion amount is 49.8-71.7 μm and the ultrasonic power is 20.155-32.206 W. These methods can not only obtain the optimal combination of processing parameters, improve the surface properties and life, but also shorten the experimental period, reduce the cost, improve the machining efficiency, and also provide the theoretical basis and experimental support for the application of ultrasonic vibration extrusion processing technology in aerospace and other industrial fields.

Funds：

2021年天津市新一代人工智能科技重大专项（21ZXJBGX00020）

作者简介：贾海利（1979-），女，博士，副教授，硕士生导师,E-mail：highly0811@163.com;通信作者：孙锐（1999-），男，硕士研究生,E-mail：sl2692492580@outlook.com

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