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中南大学学报(自然科学版)

Journal of Central South University

第50卷    第1期    总第293期    2019年1月

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文章编号:1672-7207(2019)01-0083-08
基于轧制界面表面粗糙度特征的板带轧机混合润滑特性研究
王桥医,朱媛,过山,张秋波,池冰冰

(杭州电子科技大学 机械工程学院,浙江 杭州,310018)

摘 要: 综合运用平均雷诺方程、Christensen随机粗糙峰分布理论、摩擦润滑理论和金属轧制变形理论,建立考虑表面粗糙度特征影响的轧制工作界面混合润滑模型,并采用该模型系统分析基于不同表面粗糙度方向、压下率、轧制界面膜厚比、接触载荷比、界面流体压力和接触面积比等混合润滑摩擦性能参数随润滑油卷吸速度或工作区位置变化的情况。研究结果表明:粗糙度横向分布更有利于润滑性能的提高;在相同表面粗糙度下,随着压下率增大,接触面积比和膜厚比减小;在相同压下率下,膜厚比随工作界面润滑油卷吸速度的增大而增大,而接触载荷比和接触面积比随之减小;工作界面表面粗糙度对界面流体压力分布有较大影响,在表面粗糙度最小处流体压力最小。

 

关键字: 轧制界面;混合润滑;表面粗糙度特征;压下率

Research on mixed lubrication characteristics of strip mill based on surface roughness features of rolling interface
WANG Qiaoyi, ZHU Yuan, GUO Shan, ZHANG Qiubo, CHI Bingbing

School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China

Abstract:With the comprehensive application of average Reynolds equation, Christensen random rough peak distribution theory, friction lubrication theory and metal rolling deformation theory, the mixed lubrication model of rolling interface considering the influence of surface roughness characteristics was established. Based on different roughness directions, amplitudes and reduction rates, the changes of film thickness ratio, contact load ratio, distribution of fluid pressure and contact area ratio were systematically analyzed when lubricant entrainment speed and workspace location changed. The results show that the transverse distribution of roughness is more conducive to the improvement of lubrication performance. With the surface roughness amplitude being same, the contact area ratio and the film thickness ratio decreases with the increase of the reduction rate. For the same reduction rate, the film thickness ratio increases with the increase of the lubricant entrainment speed, while the contact load ratio and the contact area ratio decrease. At the same time, the surface roughness of the interface has great influence on the fluid pressure distribution of the interface, and the pressure at the minimum amplitude is the smallest.

 

Key words: rolling surface; mixed lubrication; surface roughness characteristics; reduction rate

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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