CN2107969U

CN2107969U - Middle current plasma arc welder

Info

Publication number: CN2107969U
Application number: CN 91232391
Authority: CN
Inventors: 田丽; 李京龙; 林谦生; 许文章; 白钢; 杨金孝
Original assignee: Northwestern Polytechnical University
Current assignee: Northwestern Polytechnical University
Priority date: 1991-12-17
Filing date: 1991-12-17
Publication date: 1992-06-24

Abstract

The utility model relates to an arc welding torch for a plasma arc welder, which comprises a housing, an upper torch body, a lower torch body, a tungsten electrode, a hydroelectric used for cooling circulation, a filling pipeline for ion gas capable of increasing arc strike characteristic, and a filling pipeline for shielding gas capable of improving the forming quality of weld beads; moreover, the insulation between gun bodies adopts the materials of high insulators, so the upper and the lower gun bodies are not easy to break down. The welding torch provided by the utility model has the advantages of good cooling condition, small burning degree of the tungsten electrode, strong insulating performance, no easy breakdown and long service life; moreover, the replacement frequency of working fields is reduced, and the production efficiency is increased.

Description

Middle current plasma arc welder

The utility model relates to a kind of arc welding torch that is used for plasma welding machine, and it comprises rifle body, tungsten electrode and cooling system.

At present, welding used plasma (welding) torch is the UW-11 type plasma (welding) torch that adopts Japan to produce, because the cooling effect and the insulation effect of this welding gun are not fine, so its operating current can only reach 100 amperes.The lower bakelite material of general insulating properties is adopted in last lower gun body insulation, easily punctures.So the cooling performance of welding gun itself makes that the scaling loss degree of tungsten electrode is bigger, service life is short, needs frequent replacing aborning, influences the raising of production efficiency.

For fear of weak point of the prior art, the utility model provides a kind of good insulation preformance, rated current height, the plasma (welding) torch of good cooling results.

Technological thought of the present utility model is: increase the discharge, the throughput that are used for cool cycles, and the cooling condition that improves rifle body and tungsten electrode, and improve the striking characteristic, increase the insulation resistance value between the upper and lower rifle body, make it be difficult for puncturing, improve the life-span of welding gun.

The utility model can be taked following scheme: the composition of welding gun comprises shell 1, upper cutting gun 3, lower gun body 8, insulating barrier 9 between the two rifle bodies, the tungsten electrode 2 of clamping in the rifle body, it is characterized in that: on upper cutting gun 3 and lower gun body 8 respectively the design be equipped with two water power circulation pipes 4 and 4 ', 6 and 6 ', an air inlet pipe 5,7.By manage 4 and 4 ' recirculated water provide cooling condition for upper cutting gun, and indirect cooling effect meeting reduces the scaling loss degree of tungsten electrode; Ion gas by tracheae 5 injects directly for tungsten electrode provides cooling condition, and has improved the striking characteristic in the arc-welding.In like manner, by manage 6 and 6 ' recirculated water provide cooling condition for lower gun body, the protection gas that enters in the tracheae 7 has improved the effect of appearance of weld.

Water power pipe and tracheae, thickness of pipe wall 0.5mm.It is φ 6mm that the water power pipe can be got external diameter, and then internal diameter can be φ 5mm, and it is that φ 3mm, internal diameter are φ 2mm that tracheae can be got external diameter.

Insulating barrier in upper and lower rifle body adopts the polytetrafluoroethylmaterial material of high insulation, has increased dielectric strength, makes operating current rise to 115 amperes by 100 amperes.

Description of drawings:

Fig. 1, overall structure figure

Fig. 2, structural representation

Fig. 3, lance body structure schematic diagram

1---shell 2---tungsten electrode 3---upper cutting gun 4,4 '---water power pipe 5---ion tracheae 6,6 '---water power pipe 7---protection tracheae 8---lower gun body 9---insulating barrier 10---tungsten electrode folder 11---ceramic centering ring 12---nozzle 13---protective cover 14---the interior rings of outer shroud 15---middle ring 16---

(accompanying drawing) is further described the utility model now in conjunction with the embodiments:

Shell adopts bakelite injection molded, and volume is long 190mm, and wide is φ 28mm, and height is 105mm.Upper and lower rifle body is symmetry with the insulator; the rifle body is made up of three red copper collars; ecto-entad is followed successively by outer shroud 14, middle ring 15, interior ring 16 in shell 1; (upper cutting gun is an ionized gas for the gas compartment between outer shroud and middle ring; lower gun body is a protective gas), be the water power fluid space between middle ring and the interior ring.In a side of rifle body water power pipe (upper cutting gun is 4 and 4 ', lower gun body is 6 and 6 ') is housed, the external diameter of water power pipe is φ 6mm, and internal diameter is φ 5mm, tracheae (upper cutting gun is 5, and lower gun body is 7), and the external diameter of tracheae is that φ 3mm, internal diameter are φ 2mm.Four water power pipes and two tracheaes are by draw outside the shell in the shell always.Insulating barrier between upper and lower rifle body adopts polytetrafluoroethylene (PTFE), its dielectric strength can reach more than the 20M Ω.The center of upper cutting gun is to press from both sides 10 clampings by tungsten electrode tungsten electrode 2, and ceramic centering ring 11 is housed in the middle of the lower gun body; Nozzle 12 and protective cover 13 have been designed in the bottom of lower gun body.Present embodiment in light weight 325 grams are only arranged, and the welding gun capacity is big, and operating current is 110 amperes.

The utility model advantage compared to existing technology is that the cooling duct is reasonable, and tungsten electrode scaling loss degree is little; The performance height is difficult for puncturing; The welding gun capacity is big, and the life-span is long, reduces the turnover rate of working site, and access for welding can be good, not only improved production efficiency, but also improved soldered product quality.

Claims

1, a kind of intermediate current plasma arc welding rifle that welds usefulness that relates to; it comprises insulating barrier 9 between shell 1, upper cutting gun 3, lower gun body 8, the two rifle bodies, is clamped in the tungsten electrode 2 in the rifle body; it is characterized in that: on upper cutting gun 3 and lower gun body 8 all design be equipped with two water power pipes 4 and 4 for cooling water circulation ', 6 and 6 ' and the tracheae 5 that injects for ion gas, the tracheae 7 that injects for protection gas.

2, intermediate current plasma arc welding rifle as claimed in claim 1 is characterized in that: water power pipe 4 and 4 ', 6 and 6 ' thickness of pipe wall be 0.5mm.

3, intermediate current plasma arc welding rifle as claimed in claim 1 is characterized in that: injecting the tracheae 5 of ion gas and the thickness of pipe wall of the tracheae 7 that injects protection gas is 0.5mm.

4, intermediate current plasma arc welding rifle as claimed in claim 1 or 2, it is characterized in that: the external diameter of water power pipe can be φ 6mm, and internal diameter is φ 5mm.

5, as claim 1 or 3 described intermediate current plasma arc welding rifles, it is characterized in that the external diameter of air inlet pipe can be φ 3mm, internal diameter is φ 2mm.

6, intermediate current plasma arc welding rifle as claimed in claim 1 is characterized in that the insulating barrier between the upper and lower rifle body adopts the high polytetrafluoroethylene (PTFE) of dielectric strength.