Effects of Average Lubricant Velocity and Sliding Velocity on Friction Behavior in Mild Steel Sheet Forming
Effects of Average Lubricant Velocity and Sliding Velocity on Friction Behavior in Mild Steel Sheet Forming
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平均润滑速度和滑动速度对低碳钢板成形摩擦行为的影响
DOI：
10.1115/1.2833771
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发表时间：
1998
影响因子：
2.5
通讯作者：
Zhr
中科院分区：
文献类型：
--
作者：
K. Dohda;Zhr
采用滚动摩擦磨损试验机，研究了接触区入口处润滑剂平均速度V和变形过程中轧辊与工件间的相对滑动速度ΔV对摩擦系数的影响。对表面粗糙度为0.63 μ mRa的低碳钢板进行的实验表明，摩擦系数随成形速度的增加而减小，特别是在高成形速度下。摩擦系数的这种变化可能是由于成形速度的增加导致的ΔV的增加，因为摩擦系数随着ΔV的增加而减小，但随着V的增加变化很小。还证实了ΔV的增加或V的减少促进了工件粗糙度的平坦化。
A series of experiments was carried out using a rolling-type tribometer to investigate the frictional dependence on the average velocity of the lubricant V at the contact zone inlet and the relative sliding velocity ΔV between the roll and workpiece during deformation. Experiments using mild steel strips with a dull surface of 0.63 μm Ra showed that the friction coefficient decreases with increasing forming velocity, especially at high forming velocity. This variation in the friction coefficient may be due to the increase in ΔV derived from the increase of the forming velocity, because the friction coefficient decreases with increasing ΔV but varies little with increasing V. It was also confirmed that an increase of ΔV or a decrease in V promotes flattening of the workpiece asperities.