| 摘要 |
Particularly for 3-50 mm cut thickness, the O2 stream is pref. inclined at 10-45 degrees to the workpiece surface and one or more heating flames preheat the workpiece and stabilize the O2 stream. An asymmetrical O2 stream or 2 O2 streams with common or separate O2 feeds and the same supply container pressure of 1-30 atm. move at an advance speed, corresponding to the thickness, of 700-12000 mm/min. The workpiece is fed so that a part of the asymmetrical stream, or one of the two, has a lower stream velocity of 40-450 m/sec. and the other part flows at 330-620 m/sec. Both parts or streams are advantageously surrounded by the parallel or convergent heating flames.
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