| 摘要 |
The rethreading mechanism of a travelling wire EDM apparatus has a scrap wire disposal mechanism for disposing of the unusable length of electrode wire, or scrap, remaining in the machining zone after accidental rupture of the wire. The wire scrap disposal mechanism takes the form of a shaft having a bifurcated end defining tines between which the wire passes. Upon accidental rupture of the wire, the bifurcated shaft is automatically set in rotation such as to wind the length of wire between the shaft bifurcated end and the point of rupture of the wire in a bundle around the bifurcated end, and simultaneously exert a pull on a length of unused wire, which is also caused to wind around the shaft bifurcated end, such as to straighten the wire upstream of the bifurcated shaft. After cutting off the wire, the bundle of scrap wire around the bifurcated shaft is pushed off such as to fall in a disposal chute. |
