In the process of WEDM, the surface will undergo ionization, thermal melting and cooling, so the surface structure will change. From surface to order coating, hot melt coating, fall and heat affected layer. Basic composition and principle of automatic feed adjustment system for wire cutting
Coating layer: mainly carbon black suspended in liquid and metal particles from thermally decomposed cooling liquid, with a thickness of about 0.05 to the curved surface 5 M, pass, determine the principle of the paint, paint at the entrance and exit of the cutting line thickness is thin.
Hot melting: some of them fly to the coolant and survive soon after hot melting. They are not original structures, and their physical structures of hardness and strength are also far from each other. It cuts and welds a stack. The thickness is about 0. - 5M.
Modified layer: it is heated by the melting process of condensation splash J, but the heating and condensation are not the original structure. The original quenching hardness is very high and may become soft, so whether there is quenching hardness J and high strength may crack. The thickness of metamorphic layer is about 0. - 5M
Heat affected layer: the deteriorated substrate has a gradual layer transition process, which is the heat affected layer. There is no significant change, but it is relatively thick and about 5-20 u. It should be said that the change of the surface range of wire cutting is very small, about 2-25p in total. However, some important occasions should not be ignored, or at least the causes and consequences should be known as follow-up measures.
The longitudinal carriage and transverse carriage of the WEDM workbench move back and forth along their respective guide rails. Therefore, there are high requirements for the accuracy, rigidity and wear resistance of the guide rail. In addition, the guide rail shall make the movement of the carriage flexible and stable.
