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US 8,771,437 B2Granted
Wear detection system for a cutting nozzle on a cutting torch for cutting steel workpieces
AssigneeGeGa Lotz GmbH
InventorsAlexander Deica, Wigbert Buhr
Life of this patent
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AssigneeGeGa Lotz GmbH
InventorsAlexander Deica, Wigbert Buhr
Estimating the term…
The invention concerns a method for detecting the wear of a cutting nozzle on a cutting torch for cutting steel workpieces, in particular slabs, blooms and slugs. A branch line exits to the cutting torch in the feed line of the heating gas connection, into which branch line a neutral medium with a set pressure is blown through the cutting nozzle after closing the medium valves for heating gas, cutting oxygen and heating oxygen. To do so, said process is carried out once when installing a new cutting nozzle for the calibration thereof. Said process is performed again at set intervals, depending on the usage of the cutting nozzle, in order to determine and to store in memory the wear condition of the cutting nozzle and to generate an optical and/or acoustic signal in case a predetermined maximum admissible deviation amount of the medium blown in has been exceeded.
A method for detecting the wear of a cutting nozzle (2) on a cutting torch (1) for cutting steel workpieces, characterised in that a branch line (16) exits to the cutting torch (1) in a feed line (9) of a heating gas connection (3), into which branch line a neutral medium with a set pressure is blown through the cutting nozzle (2) after closing medium valves (6,7,8) for heating gas, cutting oxygen and heating oxygen, whereas said process is carried out once when installing a new cutting nozzle (2) for the calibration thereof, and then at set intervals, depending on the usage of the cutting nozzle (2), said process is carried out again, in order to determine and to store in memory the wear condition of the cutting nozzle (2) and to generate an optical and/or acoustic signal in case a predetermined maximum admissible deviation amount of the medium blown in has been exceeded.
A device for detecting the wear of a cutting nozzle (2) on a cutting torch (1) for cutting steel workpieces, characterised in that a mass flow valve (6,8) is incorporated in feed lines (9,11) for heating gas and heating oxygen and a branch line (16) for a medium to be blown in, preferably nitrogen, is formed in the feed line (9) for heating gas leading to the cutting torch (1), a branch line which includes at least one measuring section (22) with an interpreting unit, a pre-regulator (21) for reducing the inlet pressure of the medium to be blown in down to a set work pressure in the measuring section (22) and a precision pressure regulator (24) for maintaining the pressure of the medium to be blown in inside the measuring section (22).
Dependencies are inferred from the claim text.