Water as lubricant for high-speed forming by means of LIPSS

为了在成形过程中保护产品和工具免受磨损，使用矿物和合成润滑剂。成形润滑剂减少摩擦和磨损，并从成形区去除磨损和热量。因此，润滑剂的应用是有用的，但是在成型过程之后，需要从成型部件中除去常规的成型润滑剂，以便为后续的制造和涂层操作提供清洁的表面。因此，本研究的目的是证明水作为常规成型润滑剂替代品的适用性。由于水的粘度低，不能在常规条件下使用。工具表面的结构必须是疏水的，以便能够在高负荷成形区域保持水分。此外，必须确定适当的成形速度，从而在用水成形过程中使摩擦最小化。这些方法分别进行了检验，然后应用于深拉深工艺。在成形过程后，通过磨损分析工具，并与常规工艺进行比较，以证明水成形工艺的潜力。

In order to protect the products and tools from wear during forming processes, mineral and synthetic lubricants are used. Forming lubricants minimize friction as well as wear and remove abrasion and heat from the forming zone. Thus, the application of lubricants is useful, however after the forming process, the conventional forming lubricants need to be removed from the formed part to provide a clean surface for subsequent manufacturing and coating operations. Therefore, the goal of this research is to prove the suitability of water as a replacement for conventional forming lubricants. Due to the low viscosity of water, it cannot be used under conventional conditions. The tool surface must be structured in such a way that it is hydrophobic to be able to retain water in the high load forming region. Moreover, a proper forming speed must be identified whereby the friction can be minimized during the forming process with water. These methods are examined separately and then applied on a deep drawing process. After the forming process, the tools are analyzed by the means of wear and compared to conventional processes to demonstrate the potential of the forming process with water.