Device for and method of arc welding implementing a triaxial accelerometer

摘要

The welding device comprises a torch for arc welding, a triaxial accelerometer (X, Y, Z) to be arranged to provide a signal according to the acceleration of the torch along each axis, a unit designed to amplify the current signal provided by the triaxial accelerometer, a unit for processing the amplified current signal and for deducing the acceleration values experienced by the triaxial accelerometer along each axis, and a unit to operate an integration, during a period of time, of the acceleration values and to deduce a value of speed of movement of the torch. The welding device comprises a torch for arc welding, a triaxial accelerometer (X, Y, Z) to be arranged to provide a signal according to the acceleration of the torch along each axis, a unit designed to amplify the current signal provided by the triaxial accelerometer, a unit for processing the amplified current signal and for deducing the acceleration values experienced by the triaxial accelerometer along each axis, a unit to operate an integration, during a period of time, of the acceleration values and to deduce a value of speed of movement of the torch, a unit for calculating a linear welding energy from the value of speed of movement of the torch on the measured period of time, and a unit for displaying the welding energy calculated by the calculation unit. The welding torch is a metal inert gas/metal active gas torch, tungsten inert gas torch, plasma type torch or coated electrode type torch. The triaxial accelerometer is integrated or arranged on the torch and on a welding gun, and is attached to the torch or to the welding gun using a fixing ring system. The device further comprises a welding current generator. The signal amplifying unit, signal processing unit, the integrating unit and the calculation unit are arranged in the generator or in an external module of the generator. The signal amplifying unit is designed to amplify and linearize the current signal provided by the triaxial accelerometer. An independent claim is included for a method for tracking a welding arc.