Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Jun Kitagawa

Junya Tanabe

Yusuke Muramatsu

Koji Oda

Toshiyuki Horimukai

Keishi Setoda

Keiji Otsuka

Naoki Fukai

Shinya Oyama

Kazunao Uchiyama

Katsuya Matsumoto

A plasma welding torch that can be reduced in size more than in conventional cases. When an inert gas G such as argon gas is supplied to an outer circumferential space around a non-consumable electrode, a portion of the inert gas G is used as plasma gas GP that forms a plasma arc PA between the non-consumable electrodeand a base materialvia a plasma orifice. A plasma welding torchmoves, maintaining this state, in the direction of the arrow shown in FIG.. Meanwhile, a portion of the inert gas G supplied to a gas flowing partis not used as the plasma gas GP but is used as shielding gas GS and is ejected onto the base materialahead in the welding direction via a shielding orifice. The welding on the base materialis performed in a state where the plasma arc PA and the base materialare shielded from the air by this shielding gas.

Plasma welding torch having a nozzle with first and second orifices, and welding method using plasma welding torch having a nozzle with first and second orifices

A welding apparatus includes a first electrode tip; a second electrode tip opposing the first electrode tip; and an electrically conductive part which is provided so as to be freely interposed between the second electrode tip and a work and ensures electrical conduction between the second electrode tip and the work when the electrically conductive part is interposed between the second electrode tip and the work, the electrically conductive part including an electrically conductive member one side of which opposes the work with a presence of a void space from the work when the electrically conductive member is interposed between the second electrode tip and the work, and against which the second electrode tip is abutted on another side thereof, and a pair of electrically conductive abutment members which are provided integrally with the electrically conductive member in such a manner as to extend toward the work, and distal ends of which are abutted against the work, a position of abutment of the electrically conductive member against the second electrode tip being positioned between the pair of abutment members.

Welding apparatus and welding method

While steel sheets are positioned and held by a holding mechanism, a first laser beam is applied to a heating region of the steel sheet to space the steel sheet from the other steel sheet by a predetermined distance. A second laser beam is applied to a welding region to weld the steel sheets. An amount of heat applied by the first laser beam, a moving speed of the first laser beam, and a focused spot diameter of the first laser beam are set to keep the sheet irradiated with the first laser beam in an unmelted state and plastically deform the sheet.

Laser beam welding method and apparatus

Growing community of inventors

Tochigi, Japan

Jun Kitagawa