Research on Cleaning Cutting Tools cutlery with High Pressure Water Jet

　　Cutting tool is widely used for processing cutting in mechanical manufacturing however, a layer of chemical covering formed on the surface after heat treatment will affect its properties The cleaning effect by using high-pressure water jet technology to remove the chemical covering on the cutting tool’s surface is studied and presented in this paper. The chemical covering on the cutting tool’s surface was checked and analyzed by SEM and XRD instruments. Analysis show that the covering contains NaNO, NaH(CO3)2· 2H2O,FezOand Fe3O4,and the shapes are rod-like and/or grain like. In order to remove the covering, some cleaning tests were carried out by using cleaning machine--DBG-1850Fg3.The result scanned by SEM shows that the chemical covering was removed when water pressure at 60 MPa, the sprayer head 1.4 mm in diameter and cleaning time 60 s. High pressure water jet cleaning technology has the advantages of high efficiency and environmental protection. It presents the development of the surface cleaning of cutting tools.