考虑接触应力和温度的刀-屑摩擦因数建模

谢娜; 岳彩旭; 李晓晨; 刘献礼; 郝小乐; LIANGSteven Y

doi:10.13433/j.cnki.1003-8728.20200396

考虑接触应力和温度的刀-屑摩擦因数建模

doi: 10.13433/j.cnki.1003-8728.20200396

1.
哈尔滨理工大学先进制造智能化技术教育部重点实验室, 哈尔滨 150080
2.
佐治亚理工学院乔治·W·伍德拉夫机械工程学院, 亚特兰大 30332

基金项目:

国家重点研发计划项目 2018YFB2002201

详细信息

作者简介:
谢娜(1995-), 硕士研究生, 研究方向为切削过程刀具摩擦磨损特性研究, 18746115439@163.com

通讯作者:
岳彩旭, 教授, 博士生导师, yuecaixu@hrbust.edu.cn

中图分类号: TH117.1
计量
- 文章访问数: 98
- HTML全文浏览量: 34
- PDF下载量: 13
- 被引次数: 0
出版历程
- 收稿日期: 2020-08-24
- 刊出日期: 2022-06-25

Tool-chip Friction Coefficient Modeling by Considering Contact Stress and Temperature

1.
Key Laboratory of Advanced Manufacturing and Intelligent Technology, Harbin University of Science and Technology, Harbin 150080, China
2.
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta 30332, America

摘要

摘要: 刀具-切屑接触摩擦特性对切削过程中的力、温度及刀具磨损等均会产生较大的影响。针对此, 建立刀-屑接触摩擦因数与接触面正应力和相对温度之间的经验模型。采用HT-1000多功能球-盘摩擦磨损试验机, 进行硬质合金球(模拟刀具)和Ti6Al4V(模拟工件)的摩擦试验, 通过试验数据建立并验证了考虑接触应力和切削温度的摩擦因数模型。以此为基础, 基于斜角切削理论构建变摩擦因数的立铣刀铣削力模型。通过与钛合金铣削实验测的铣削力值进行对比验证, 得出所建立的变摩擦因数的铣削力模型的准确性。
- 刀-屑接触 /
- 摩擦因数 /
- 接触应力 /
- 温度 /
- 铣削过程
Abstract: The friction characteristics between the tool and the chip will affect the cutting force, cutting heat and tool wear in the milling. Aiming at the above mentioned, an empirical model between the normal stress and the relative temperature to describe the tool-chip friction coefficient is established. The HT-1000 multifunctional ball-disk friction and wear tester was used to simulate the friction process among the cemented carbide tools and Ti6Al4V parts, and the friction coefficient model by considering contact stress and cutting temperature was established and verified through the testing data. With the present friction coefficient model, the model for milling force is constructed based on the oblique cutting theory, which can be further verified via the milling experiment of titanium alloy.
- tool-chip contact /
- friction coefficient /
- contact stress /
- temperature /
- milling

HTML全文

图 1 球-盘摩擦实验现场图

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图 2 非线性最小二乘拟合曲面

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图 3 摩擦因数对比分析

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图 4 切削区域受力分析

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图 5 刀具-刀屑接触的基本摩擦模型

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图 6 F_x的实验值与仿真值

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图 7 F_y的实验值与仿真值

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表 1 正交试验设计及结果

组序	T/℃	F/N	μ
1	300	2.50	0.415
2	300	3.50	0.388
3	300	4.50	0.372
4	400	2.50	0.374
5	400	3.50	0.360
6	400	4.50	0.345
7	500	2.50	0.342
8	500	3.50	0.327
9	500	4.50	0.290

下载: 导出CSV

表 2 验证试验设计与结果

组序	T/℃	F/N	μ
1	250	3.00	0.472
2	350	4.00	0.399
3	450	4.50	0.347

下载: 导出CSV

表 3 刀具结构参数

半径R/mm	螺旋角β/(°)	前角α/(°)	齿数N
5	25	13.5	2

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表 4 实验加工参数

n/(r·min^-1)	a_p/mm	a_e/mm	f/(mm·min^-1)
600	8	0.1	100

下载: 导出CSV

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