Hot wire type arc welding torch and cable
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsAkiyoshi Nawa, Yoshiaki Kato, Takao Shimizu
Life of this patent
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Abstract
A wire heating torch is mounted closely parallel to a TIG torch 1, and includes a slide base 28 having a vertically adjustable slide shaft 36 disposed therein. A rotatably adjustable slide member 27 is mounted to the lower end of the slide shaft, and carries an angularly disposed guide member 26 for directing the feed of an electrically heated welding wire 5. A conduit cable 44 for the torch includes an electrical power cable 45 and a wire feed liner 60 wrapped by a spring tube 50, both encased within a thermally shrinkable insulating tube 64 to form an integral assembly.
Claims14
A hot wire arc welding torch apparatus, comprising:
- (a) a non-consumable electrode (2);
- (b) a nozzle surrounding said electrode for supplying a shielding gas to an arc (6) and a weld puddle (10) formed on a workpiece (9);
- (c) a TIG welding torch (1) mounting said electrode and nozzle;
- (d) a vertical adjusting unit (28-32) disposed in parallel and in close proximity to said TIG welding torch and attached thereto by a holder (4);
- (e) a slide member (27) rotatably attached to the lower end of a slide shaft (36) which is slidable in said vertical adjusting unit, said slide member being vertically movable with said slide shaft;
- (f) a guide member (26) attached to the lower end of said slide member at an angle to said vertical adjusting unit for feeding a wire (5) of a filler metal to said arc formed between said electrode and said workpiece;
- (g) a wire heating torch attached to the top of said vertical adjusting unit for supplying an electric current to said wire;
- (h) a power source (20) for supplying an electrical current to a region between said wire and said workpiece through said wire heating torch to heat said wire;
- and
- (i) a conduit cable (44) including an electrical power cable (45) connected to an upper end of said wire heating torch for feeding said wire;
- (j) said wire being fed through said wire heating torch, said vertical adjusting unit and said guide member;
- and
- said conduit cable comprising:
- a liner (60) for guiding a welding wire (5);
- a protective spring tube (50) surrounding said liner;
- an adaptor (59) surrounding one end of said tube;
- a current feeder (61) threadedly connected with said adaptor;
- a current feeding ring (69) surrounding the other end of said tube;
- a power cable (45) extending along said tube for supplying electrical current for heating said wire;
- and
- a thermally shrinkable insulating tube (64) enclosing said spring tube and said power cable therein to form an integral assembly;
- said power cable having at one end a conductor (63) held between said adaptor and said current feeder, said conductor being divided at the other end of said cable into a plurality of segments (65) individually secured in a plurality of holes formed in said ring.
A conduit cable for a hot wire arc welding torch, comprising:
- (a) a liner (60) for guiding a welding wire (5);
- (b) a protective spring tube (50) surrounding said liner;
- (c) an adaptor (59) surrounding one end of said tube;
- (d) a current feeder (61) threadedly connected with said adaptor;
- (e) a current feeding ring (69) surrounding the other end of said tube;
- (f) a power cable (45) extending along said tube for supplying electrical current for heating said wire;
- and
- (g) a thermally shrinkable insulating tube (64) enclosing said spring tube and said power cable therein to form an integral assembly;
- (h) said power cable having at one end a conductor (63) held between said adaptor and said current feeder, said conductor being divided at the other end of said cable into a plurality of segments (65) individually secured in a plurality of holes formed in said ring.
Dependencies are inferred from the claim text.