公开(公告)号：US5278392A

公开(公告)日：1994-01-11

申请号：US961467

申请日：1992-10-15

申请人： Donald E. Takacs

发明人： Donald E. Takacs

IPC分类号： B23K9/29 ,  B23K9/00

CPC分类号： B23K9/295 ,  B23K9/328

摘要： A welding torch for gas metal arc welding has a torch body which conducts electricity, receives a cable for directing a welding wire, and defines a passage for directing a shielding gas. A conductor tube has an inner end portion secured to the torch body and a free outer end portion, and a contact tip is secured to the outer end portion of the conductor tube. The contact tip has a central bore which directs the welding wire through the tip, and a diffuser directs the shielding gas around the contact tip and conducts electrical power to the contact tip. A tubular welding nozzle body is formed of a porous polycrystalline graphite material and has a slightly tapered inner surface which surrounds the contact tip for collimating the gas while substantially reducing the accumulation of spatter on the nozzle body. The contact tip may also be covered with the same graphite material to impede spatter accumulation, and the porous graphite material is impregnated with petrolatum and wax to extend the service life of the body. The tubular nozzle body may be protected by a surrounding copper jacket, and an interfitting band of ceramic material retains the body within the jacket.

摘要翻译： 用于气体金属电弧焊的焊枪具有传导电的焊炬体，接收用于引导焊丝的电缆，并且限定用于引导保护气体的通道。 导体管具有固定到炬体的内端部和自由外端部，并且接触尖端固定到导体管的外端部。 接触尖端具有引导焊丝穿过尖端的中心孔，并且扩散器将保护气体引导到接触尖端周围并将电力传导到接触尖端。 管状焊接喷嘴体由多孔多晶石墨材料形成，并且具有略微锥形的内表面，该内表面围绕接触尖端以准直气体，同时大大减少喷嘴体上飞溅物的积聚。 接触尖端也可以用相同的石墨材料覆盖以阻止飞溅物堆积，并且多孔石墨材料用凡士林和蜡浸渍以延长机体的使用寿命。 管状喷嘴体可以由周围的铜套保护，并且陶瓷材料的配合带将主体保持在护套内。