GAS CUTTING METHOD AND GAS CUTTING DEVICE

WIPO Patent Application WO/2010/032376

A1

Provided is a gas cutting method for cutting a workpiece by using a cutting tip provided with a preheating hole for forming a preheating flame by a combustion gas and a preheating oxygen gas and a cutting oxygen hole for jetting a cutting oxygen gas, which is capable of reducing the amount of consumption of a hydrogen gas by supplying the combustion gas suitable for heating of the workpiece and cutting of the work piece, respectively, to the preheating hole.  Also provided is a gas cutting device.  A gas cutting device (30) for supplying an oxygen gas and a fuel gas to a cutting tip (20) provided with a preheating hole (23) and a cutting oxygen hole (22) is characterized by being provided with an oxygen gas supply circuit (50), a hydrogen gas supply circuit (41), a propane gas supply circuit (45), and a control unit (60), wherein the control unit (60) is configured to cause the ratios of a hydrogen gas and a hydrocarbon-based gas which are to be supplied to the preheating hole (23) when the workpiece is heated and when the workpiece is cut to differ from each other.

NAGAHORI MASAYUKI (JP)
KAMIKIHARA HIROTAKA (JP)
TAKEDA TAKASHI (JP)
SATO TOYOYUKI (JP)
YAMAMOTO YASUYUKI (JP)
KATO TAKASHI (JP)

PCT/JP2009/003946

March 25, 2010

August 19, 2009

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TAIYO NIPPON SANSO CORP (JP)
NAGAHORI MASAYUKI (JP)
KAMIKIHARA HIROTAKA (JP)
TAKEDA TAKASHI (JP)
SATO TOYOYUKI (JP)
YAMAMOTO YASUYUKI (JP)
KATO TAKASHI (JP)

B23K7/10; F23D14/42

WO2007020727A1

2007-02-22

JP2005224845A	2005-08-25
JPS59219391A	1984-12-10
JP2003080368A	2003-03-18
JP2007000902A	2007-01-11

SHIGA, Masatake et al. (JP)
Masatake Shiga (JP)

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