| 摘要 |
PROBLEM TO BE SOLVED: To stably perform automatic wire connection and enhance a machine operation rate in a wire-electrical discharge machining device equipped with an automatic wire connection apparatus.SOLUTION: A heat insulation tube 12 is so inserted as to be stuck to an inner side of a guide pipe 10. Thermal diffusion from a wire electrode 2 to the heat insulation tube 12 during annealing is suppressed, whereby a stable straightness is obtained, and further, an inner diameter of the guide pipe 10 is reduced, whereby a flow velocity of a pressure fluid for guiding the wire electrode 2 is increased and propulsion power of the wire electrode 2 is increased, and consequently, a success rate of automatic wire connection can be increased.SELECTED DRAWING: Figure 2 |
