东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (7): 1005-1010.DOI: 10.12068/j.issn.1005-3026.2014.07.021

• 机械工程 • 上一篇    下一篇

冷轧过程中的混合润滑特性

付括，臧勇，郜志英   

  1. (北京科技大学 机械工程学院， 北京100083)
  • 收稿日期:2013-10-08 修回日期:2013-10-08 出版日期:2014-07-15 发布日期:2014-04-11
  • 通讯作者: 付括
  • 作者简介:付括(1986-)，男，黑龙江伊春人，北京科技大学博士研究生;臧勇(1963-)，男，江苏铜山人，北京科技大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51175035);教育部高等学校博士学科点专项科研基金资助项目(20100006110024).

Mixed Lubrication Characteristics of Cold Rolling Process

FU Kuo， ZANG Yong， GAO Zhiying   

  1. School of Mechanical Engineering， University of Science and Technology Beijing， Beijing 100083， China.
  • Received:2013-10-08 Revised:2013-10-08 Online:2014-07-15 Published:2014-04-11
  • Contact: ZANG Yong
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摘要： 基于Christensen的表面粗糙峰分布假设，以轧制理论、流体力学理论为基础建立了考虑表面粗糙度的冷轧混合润滑模型，并提出了混合润滑摩擦状态约束关系式用来判别摩擦状态.对不同条件下油膜厚度、接触面积比、压应力及摩擦应力分布情况进行了仿真分析.结果表明:随着压下率的增加，油膜变薄、界面接触面积比增加、应力增大;同时，表面粗糙度对界面接触面积比及应力分布有较大影响，粗糙度增加，界面接触面积比增加，压应力及摩擦应力均增加.较高的润滑液黏度或轧制速度可以有效地降低轧制界面摩擦力及轧制力.

关键词: 轧制, 界面, 混合润滑, 接触面积比, 应力分析

Abstract: Based on the surface asperity distribution hypothesis of Christensen and the theory of rolling and hydrodynamics， a mixed lubrication model was set up for cold rolling process in which surface roughness is taken into consideration. The mixed film lubrication constraint relation was also proposed to judge the friction condition. The distribution of film thickness， contact area ratio， pressure stress and friction stress were simulated and analyzed under different conditions using this model. The results showed that larger reduction results in a thinner film thickness， larger contact area ratio of the interface and higher stress. Surface roughness was shown to have a pronounced effect on the contact area ratio and the stress distribution. As the surface roughness increases， the contact area ratio， as well as pressure stress and friction stress， would increase. Higher viscosity lubricant or roll speed can reduce the friction and the rolling force effectively.

Key words: rolling, interfaces, mixed lubrication, contact area ratio, stress analysis

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