Interaction Effects of Processing Parameters on Surface Quality of Two-dimensional Ultrasonically Extruded 7075 Aluminum Alloy

doi:10.3969/j.issn.1000-1093.2017.06.024

Abstract

Abstract: The orthogonal test was carried out to study the interaction effects of processing parameters on the surface quality of two-dimensional ultrasonically extruded 7075 aluminum alloy. The optimal parameters, including static pressure F_s, extrusion speed v and feed rate f_r, were studied. The influence order and significance of processing parameters which have the interaction effects on the surface roughness and hardness are determined through range analysis and variance analysis. The prediction models for surface roughness and hardness are constructed using regression analysis based on data-driven method. The interaction effects of processing parameters on surface roughness and hardness are analyzed based on response surface method. The optimal processing parameters are determined by constrained multi-objective programming model. The study found that the surface roughness of 7075 aluminum alloy decreases obviously after two-dimensional ultrasonic vibration, while the surface hardness increases greatly. The surface roughness mainly depends on the interaction of v and f_r, v and f_r, while the surface hardness mainly depends on F_s, v, and the interaction effects of v and f_r as well as F_s and v. The surface roughness and surface hardness obtained by the prediction models are close to the measured values, and the optimal parameters with the lowest surface roughness and the highest hardness agree with the experimental results. The results show that the interaction effects of the processing parameters on the surface quality are important, and the prediction models for surface roughness and hardness are effective. Key

Key words: manufaturingtechnologyandequipment, two-dimensionalultrasonicvibration, ultrasonicextrusion, surfacequality, interaction, aluminumalloy

CLC Number:

ZHENG Jian-xin, LIU Wei-cheng, DUAN Yu-tao. Interaction Effects of Processing Parameters on Surface Quality of Two-dimensional Ultrasonically Extruded 7075 Aluminum Alloy[J]. Acta Armamentarii, 2017, 38(6): 1231-1238.

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第38卷
第6期2017 年6月兵工学报ACTA
ARMAMENTARIIVol.38No.6Jun.2017

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