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

为了保护产品和工具在成型过程中免受磨损，使用矿物和合成润滑剂。成形润滑剂可最大限度地减少摩擦和磨损，并消除成形区的磨损和热量。因此，润滑剂的应用是有用的，然而在成形过程之后，常规的成形润滑剂需要从成形部件去除以提供用于随后的制造和涂覆操作的清洁表面。因此，本研究的目的是证明水作为传统成形润滑剂的替代品的适用性。由于水的粘度低，不能在常规条件下使用。工具表面必须以这样的方式构造，即它是疏水的，以便能够在高载荷成形区域中保持水。此外，必须确定适当的成形速度，从而可以在用水成形过程中使摩擦最小化。这些方法分别进行了检查，然后应用于拉深过程。在成形过程之后，通过磨损手段分析工具，并与传统工艺进行比较，以证明用水成形工艺的潜力。

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.