| 摘要 |
PCT No. PCT/JP94/01218 Sec. 371 Date Jan. 26, 1996 Sec. 102(e) Date Jan. 26, 1996 PCT Filed Jul. 25, 1994 PCT Pub. No. WO95/03910 PCT Pub. Date Feb. 9, 1995A plasma torch can produce a uniform and intense swirl in the operating gas, and as a result further stabilize the output of the plasma jet, which results in good cutting quality, so as to extend the life of consumables or the like. This is achieved when jet ports (3) from which operating gas G is ejected are positioned such that in a transverse cross-section (2A) of a swirler (50) including the jet ports (3), a relationship between a diameter D of a swirler chamber and a minimum distance (d) from a line (2b), which is tangent to the diameter D of the swirler chamber and parallel to a projected line (3c) of an axis (3b) of the jet hole (3a), to the side end (2c), of the side of the jet port (3) adjacent to the tangential line (2b), is represented by 0<d/D</=0.03.
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