AUTOMATIC LUBRICATING DEVICE FOR INSIDE OF TORCH AND ELASTIC ORIFICE OF AUTOMATIC CO2 WELDING MACHINE

摘要

PURPOSE:To stabilize wire feeding and to provide lower sputtering and higher efficiency by disposing an oil tank, a valve interlocked to a torch switch and an oil flow controller. CONSTITUTION:The oil tank 1 is an oil tank which can be hermetically sealed and pressurized. This oil tank is kept pressurized by CO2 for welding subjected to pressure reduction from a CO2 cylinder. The electromagnetic valve 2 interlocked to the torch switch and the oil flow controller 3 are disposed to feed oil into a torch from an insulator 4 having a mouthpiece for connection to an oil feed hose. The elastic orifice 5 is a cylinder formed of a stock having elasticity such as silicone resin which is not carbonized by heat. The oil admitted into the torch wets the outside circumference of the orifice 5 and the inside surface of the nozzle by the elastic orifice 5 and a part thereof wets the front end of the tip by flowing along the section of the cylinder. A proper volume of the clean oil is thereby supplied into the torch and the stable feeding of a wire is executed and, therefore, the increase in sputtering by the fluctuation in welding conditions by the delay and unequalness of the wire feeding is prevented. Beautiful beads are thus obtd.