WORKING LIQUID EJECTOR OF WIRE ELECTRIC DISCHARGE MACHINE

摘要

A working liquid ejector of wire electric discharge machine comprising a nozzle for ejecting working liquid into the inter-pole gap of a work (W) and a wire electrode (E), a casing (16) secured to machining heads (15) disposed above and below the work (W), and a member (18) for coupling the cashing (16) and the nozzle (17), having a specified elastic modulus and being deformed by the pressure of the working liquid. In a coupled body of the coupling member (18) and the nozzle (17), hollow sections having an inlet side inside diameter (D2) and an outlet side inside diameter (D1) and no variation in the cross-sectional area are formed on the inlet side and outlet side of working liquid, and a hollow section having a minimum inside diameter (D0) and no variation in the cross-sectional area is formed between the inlet side and the outlet side of working liquid. Productivity can be enhanced at the time of machining with a nozzle tightly contacting and at the time of machining with the nozzle separated.