Friction coefficients in cold forging: A global perspective
Friction coefficients in cold forging: A global perspective
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DOI：
10.1016/j.cirp.2018.04.106
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发表时间：
2018-01-01
影响因子：
4.1
通讯作者：
Moreau, P.
中科院分区：
文献类型：
--
作者：
Groche, P.;Kramer, P.;Moreau, P.
在世界范围内，至少有20种不同的摩擦学试验已被提出用于冷锻过程中摩擦系数的经验测定。然而，由于不同的测试设置、测量手段和抽象水平，结果的可比性是有争议的。在这项工作中，六个既定的测试原则进行比较，使用相同的摩擦学系统。观察到经验确定的摩擦系数之间存在较大差异，但可以根据相应的摩擦学载荷进行解释。对挤压过程的进一步研究表明，摩擦模型还必须考虑润滑剂膜的局部厚度变化。(C)2018由Elsevier Ltd代表CIRP发布。
Worldwide, at least twenty different tribological tests have been proposed for the empirical determination of friction coefficients in cold forging processes. Due to the varying test setups, means of measurement, and level of abstraction, the comparability of the outcomes is, however, disputable. Within this work, six established test principles are compared using identical tribological systems. Large differences between the empirically determined friction coefficients are observed but can be explained under consideration of the respective tribological loads. Additional investigations of an extrusion process reveal that friction models also have to take into account the varying local thickness of the lubricant film. (C) 2018 Published by Elsevier Ltd on behalf of CIRP.