阶梯型前角刀具制备应变可控铝带材的仿真与试验

doi:10.16183/j.cnki.jsjtu.2024.107

上海交通大学学报 ›› 2026, Vol. 60 ›› Issue (2): 338-348.doi: 10.16183/j.cnki.jsjtu.2024.107

• 机械与动力工程 • 上一篇

阶梯型前角刀具制备应变可控铝带材的仿真与试验

钟佩璇, 张保玉, 李松青, 申鹏宇, 邓文君()

华南理工大学机械与汽车工程学院,广州 510640

收稿日期:2024-04-01 修回日期:2024-05-03 接受日期:2024-05-08 出版日期:2026-02-28 发布日期:2026-03-06
通讯作者: 邓文君 E-mail:dengwj@scut.edu.cn.
作者简介:钟佩璇(1999—),博士生,从事金属切削及其仿真分析、超细晶材料制备等研究.
基金资助:
国家自然科学基金项目(52075187);广东省自然科学基金项目(2022A1515010995)

Simulation and Experiments on Fabrication of Strain Controllable Aluminum Strips by Stepped Rake Angle Tool

ZHONG Peixuan, ZHANG Baoyu, LI Songqing, SHEN Pengyu, DENG Wenjun()

School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China

Received:2024-04-01 Revised:2024-05-03 Accepted:2024-05-08 Online:2026-02-28 Published:2026-03-06
Contact: DENG Wenjun E-mail:dengwj@scut.edu.cn.

摘要/Abstract

摘要：

挤出切削过程中刀具前角的减小有利于增大切应变和细化晶粒,但容易导致带材挤出困难和表面质量差等问题.为提高超细晶铝带材的成形质量,实现应变分布的可控调整,提出阶梯型前角刀具挤出切削的新工艺.通过仿真与试验相结合,探究了6061铝合金在不同加工参数下的带材形貌、显微硬度与微观组织.同时开展常规前角刀具挤出切削作为对比试验.结果显示阶梯型前角刀具可实现超细晶带材的连续成形,且带材内部形成不同的应变分布,通过改变待切厚度可以调整高、低应变区占比.该工艺可为刀具设计与超细晶材料制备提供思路与方法.

关键词: 超细晶带材, 成形质量, 应变分布, 阶梯型前角刀具, 6061铝合金

Abstract:

The reduction of the tool rake angle in the extrusion machining process is conducive to increase the shear strain and grain refinement, but it easily leads to problems such as strip extrusion difficulties and poor surface quality. To improve the forming quality of ultrafine-grained aluminum strips and to realize the controllable strain distribution adjustment, a new process of extrusion machining with a stepped rake angle tool is proposed. By combining simulation and experiments, the strip morphology, microhardness, and microstructure of 6061 aluminum alloy under different machining parameters are investigated. Extrusion machining with conventional rake angle tool is also conducted as a comparative test. The results show that the stepped rake angle tool achieves the continuous formation of ultrafine-grained strip with different strain distributions within the strip, and the ratio of high and low strain zones is adjustable by changing the cutting thickness. This process can provide ideas and methods for tool design and ultrafine-grain material preparation.

Key words: ultrafine-grained strip, forming quality, strain distribution, stepped rake angle tool, 6061 aluminum alloy

中图分类号:

TG506
TH162

钟佩璇, 张保玉, 李松青, 申鹏宇, 邓文君. 阶梯型前角刀具制备应变可控铝带材的仿真与试验[J]. 上海交通大学学报, 2026, 60(2): 338-348.

ZHONG Peixuan, ZHANG Baoyu, LI Songqing, SHEN Pengyu, DENG Wenjun. Simulation and Experiments on Fabrication of Strain Controllable Aluminum Strips by Stepped Rake Angle Tool[J]. Journal of Shanghai Jiao Tong University, 2026, 60(2): 338-348.

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化学成分	质量分数/%
Mg	1.02
Si	0.69
Fe	0.43
Cu	0.40
Cr	0.35
Zn	0.25
Mn	0.15
Al	余量

参数	取值
温度/℃	20
刀具速度/(mm·s^-1)	105
摩擦因数	0.2
单步步长/mm	0.02
步数	1 500

t₀ /mm	等效应变模拟值	等效应变计算值	相对误差/%
0.3	3.99	3.93	1.5
0.4	3.72	3.81	2.4
0.5	3.50	3.30	5.7
0.6	3.29	3.13	4.9
0.7	3.09	2.97	3.9
0.8	2.93	2.80	4.4

加工参数	Sa最大值/μm	Sa平均值/μm	标准差/ μm
CRA,γ=5°,t₀=0.5 mm	28.613	23.647	4.967
CRA,γ=20°,t₀=0.5 mm	12.754	10.605	2.149
SRA,t₀=0.5 mm	20.710	17.118	2.792
SRA,t₀=0.3 mm	23.289	19.118	4.028
SRA,t₀=0.7 mm	11.835	10.289	1.546

阶梯型前角刀具制备应变可控铝带材的仿真与试验

Simulation and Experiments on Fabrication of Strain Controllable Aluminum Strips by Stepped Rake Angle Tool

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