TORCH HEIGHT CONTROL METHOD FOR PLASMA CUTTING

PURPOSE:To obtain the excellent cutting quality by monitoring the cutting speed and ensuring the optimum torch height even if the cutting speed is changed. CONSTITUTION:A torch 1 is set at the optimum height (hc) from base metal 2 (S5), the base metal 2 is cut by a plasma arc 3 and after the arc vol...

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Bibliographische Detailangaben
1. Verfasser:	NISHI YOZO
Format:	Patent
Sprache:	eng
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain the excellent cutting quality by monitoring the cutting speed and ensuring the optimum torch height even if the cutting speed is changed. CONSTITUTION:A torch 1 is set at the optimum height (hc) from base metal 2 (S5), the base metal 2 is cut by a plasma arc 3 and after the arc voltage is stabilized (S6), the arc voltage Vi is read plural times (i=1-n) (S7), the average arc voltage Vb of these is calculated (S8), at the time of regular cutting, the cutting speed Fa is read, the above-mentioned average arc voltage Vb is corrected and made to the target arc voltage Vc by this cutting speed Fa (S9) and the above-mentioned optimum torch height (hc) is maintained by this target arc voltage Vc (S10).