The requirements for green and sustainable manufacturing mean that stamping lubricants must be continuously re-evaluated and re-designed. In this investigation, the tribological performance of four base oils with different chemical structures (paraffinic and naphthenic) and viscosities (2 and 20 cSt), as well as water, was evaluated for the stamping of steel sheets and compared with a non-lubricated contact. Most lubricants reduce the coefficient of friction and maintain a similar wear coefficient for steel sheets as in dry contacts. Low-viscosity (LV) naphthenic oil performs very like both high-viscosity (HV) oils. A surprising exception is the LV paraffinic oil, with several-times-higher friction and wear compared to dry contact. This is due to the excellent wetting-spreading and very low cohesion forces that enable oil to escape from extremely thin-film contacts because the viscosity is so low, leading to lubricant starvation. In contrast, HV oils provide a sufficiently thick lubricating film, while strong cohesive forces help in the film’s strength, lessening wear, and reducing friction. In thin-film lubrication with LV oils, such as when stamping, it is thus extremely important that the lubricant’s wetting behaviour and viscosity are sufficient to provide enough film in the contact and prevent starvation, thus ensuring lower friction, less wear, and a longer lifetime of the contact.

绿色和可持续制造的要求意味着冲压润滑剂必须不断地重新评估和重新设计。在这项研究中，评估了四种具有不同化学结构（石蜡油和环烷油）和粘度（2 和 20 cSt）的基础油以及水的钢板冲压摩擦学性能，并与非润滑接触进行了比较。大多数润滑剂会降低摩擦系数，并保持钢板与干接触时相似的磨损系数。低粘度 (LV) 环烷油的性能与高粘度 (HV) 油非常相似。一个令人惊讶的例外是 LV 石蜡油，其摩擦和磨损比干接触高几倍。这是由于优异的润湿扩散性和非常低的内聚力，使油能够从极薄的薄膜接触中逸出，因为粘度太低，导致润滑剂不足。相比之下，HV 油可提供足够厚的润滑膜，而强大的内聚力有助于增强膜的强度，减少磨损并减少摩擦。在使用 LV 油的薄膜润滑中，例如冲压时，润滑剂的润湿性能和粘度足以在接触处提供足够的油膜并防止饥饿，从而确保更低的摩擦、更少的磨损和更长的使用寿命，这一点极其重要。触点的使用寿命。而强大的内聚力有助于提高薄膜的强度，减少磨损并减少摩擦。在使用 LV 油的薄膜润滑中，例如冲压时，润滑剂的润湿性能和粘度足以在接触处提供足够的油膜并防止饥饿，从而确保更低的摩擦、更少的磨损和更长的使用寿命，这一点极其重要。触点的使用寿命。而强大的内聚力有助于提高薄膜的强度，减少磨损并减少摩擦。在使用 LV 油的薄膜润滑中，例如冲压时，润滑剂的润湿性能和粘度足以在接触处提供足够的油膜并防止饥饿，从而确保更低的摩擦、更少的磨损和更长的使用寿命，这一点极其重要。触点的使用寿命。