7075铝合金二维超声挤压加工表面质量影响因素及其交互作用研究

doi:10.3969/j.issn.1000-1093.2017.06.024

兵工学报 ›› 2017, Vol. 38 ›› Issue (6): 1231-1238.doi: 10.3969/j.issn.1000-1093.2017.06.024

7075铝合金二维超声挤压加工表面质量影响因素及其交互作用研究

郑建新，刘威成，段玉涛

（河南理工大学机械与动力工程学院，河南焦作 454003）

收稿日期:2016-08-30 修回日期:2016-08-30 上线日期:2017-12-15
作者简介:郑建新（1979—），男，教授，硕士生导师。E-mail: zhengjx@hpu.edu.cn
基金资助:
国家自然科学基金项目（ 51005071、51575163）；河南省高等学校重点科研项目（16A460006）

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

ZHENG Jian-xin, LIU Wei-cheng, DUAN Yu-tao

（School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China）收稿日期： 2016-08-30 基金项目：国家自然科学基金项目（ 51005071、51575163）；河南省高等学校重点科研项目（16A460006）作者简介：郑建新（1979—），男，教授，硕士生导师。E-mail: zhengjx@hpu.edu.cn

Received:2016-08-30 Revised:2016-08-30 Online:2017-12-15

摘要/Abstract

摘要： 进行二维超声挤压加工正交试验，研究静压力、挤压速度和进给量等工艺参数及其交互作用对7075铝合金表面质量的影响，并寻求最优工艺参数。通过极差分析和方差分析，确定工艺参数及其交互作用对表面粗糙度和表层硬度的影响主次顺序和影响显著性；基于数据驱动，采用回归分析方法构建表面粗糙度和表层硬度预测模型；基于响应曲面法，分析交互作用对表面粗糙度和表层硬度的影响；利用有约束多目标规划模型，确定最优工艺参数。研究发现：经过二维超声挤压加工后，7075铝合金试件表面粗糙度值明显降低，而表层硬度大幅度提高；表面粗糙度主要取决于挤压速度和进给量的交互作用，而表层硬度主要取决于静压力、挤压速度，以及挤压速度和进给量、静压力和挤压速度的交互作用。基于预测模型获得的表面粗糙度和表层硬度与实测结果基本吻合；基于最小表面粗糙度值和最高表层硬度值目标下的最优工艺参数也与试验结果较为吻合。研究结果表明，工艺参数之间的交互作用对表面质量的影响是不可忽略的，所构建的表面粗糙度模型和表层硬度模型是有效的。

关键词: 机械制造工艺与设备, 二维超声振动, 超声挤压, 表面质量, 交互作用, 铝合金

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

中图分类号:

郑建新，刘威成，段玉涛. 7075铝合金二维超声挤压加工表面质量影响因素及其交互作用研究[J]. 兵工学报, 2017, 38(6): 1231-1238.

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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7075铝合金二维超声挤压加工表面质量影响因素及其交互作用研究

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

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