CN2072455U

CN2072455U - Plasma arc welding blow lamp

Info

Publication number: CN2072455U
Application number: CN 90201522
Authority: CN
Inventors: 葛志雄
Original assignee: NANCHANG AVIATION INDUSTRY COLLEGE
Current assignee: NANCHANG AVIATION INDUSTRY COLLEGE
Priority date: 1990-02-10
Filing date: 1990-02-10
Publication date: 1991-03-06

Abstract

The utility model relates to a novel plasma arc welding blow lamp. The utility model adopts an indirect water cooling method. A compression arc nozzle of the utility model is tightly attached to a cooling water jacket by a conical surface, so that the effect of cooling is good, the electric current with large power can be endured, the installation and the maintenance are convenient and the service life is long. The utility model solves the problems which exist in ordinary welding blow lamps with an ordinary indirect water cooling structure. Meanwhile, the utility model overcomes the disadvantages existing in the direct water cooling welding blow lamps that the structure is complicated, the volume is large, the operation is inconvenient, etc. The utility model is an ideal and applicable plasma arc welding blow lamp.

Description

Plasma arc welding blow lamp

The utility model belongs to a kind of plasma arc welding (PAW) welding torch.

At present, " Electric Arc Welding ﹠ Electroslag Welding " book of domestic and foreign literature such as the Jiang Huanzhong of Shanghai university of communications chief editor (publishing in 1988) and U.S.'s welding magazine " Welamg Joural " (Vol63 No9P27-1984) etc. have been reported various plasma welding torches, are mainly used in the Welding Problems that solves the following sheet metal of 3mm.They structurally can reduce two kinds of forms: a kind of is to adopt but formula (accompanying drawing one) of indirect water-cooling, its design feature is arc of folding nozzle 2 ' usefulness screw thread and cooling jacket 6 ' binding, because plasma arc temperature height, screw thread bears high temperature for a long time, easily oxidation corrosion, the threaded connection contact is bad in addition, it is more and more poor that cooling effect pushing away in time died, and the life-span is extremely short, and therefore general welding current can only be less than 40A, and energy-flux density descends, and use is very limited; Another kind is to adopt direct water-cooling formula (accompanying drawing two), its design feature is the endoporus that arc of folding nozzle 2 " directly was inserted in or was pressed into cooling jacket 6 ", the end face of the compressed arc nozzle of cooling water flow, good cooling results allows welding current greater than 40A, but lower gun body thereby complex structure, the accuracy of manufacture requires high, and the assembling maintenance difficult is simultaneously because volume is big, workman's operation is very inconvenient, thereby also is very limited in the use.

The purpose of this utility model is to adopt a kind of indirect water-cooling formula welding torch of new structure to replace above-mentioned two kinds of welding torches, make it both to keep advantages such as former indirect water-cooling formula torch structure is simple, easy to operate, reach good cooling results again and can replace direct water-cooling formula welding torch, assemble simultaneously easy to maintenance, the welding torch long service life.

The utility model scheme is as follows:

The structure of the lower gun body of welding torch (accompanying drawing three) is that the lower end of tungsten bar 1 is stretched in the arc of folding nozzle 2; linking nut 3 is fastened on the arc of folding nozzle on the cooling jacket 6; lower gun body outside be protective cover 4 and insulator 5 ', it is characterized in that arc of folding nozzle 2 and cooling jacket 6 lump together by the direct card of their conical surface.

The arc of folding nozzle can have upper and lower two conical surfaces, and the last conical surface and the cooling jacket conical surface fit tightly, and the following conical surface is fixed tightly in it on cooling jacket by linking nut 3.

The utility model is owing to adopt indirect water-cooling, so it is simple in structure, compact, manual operations is convenient, be one because arc of folding nozzle and cooling jacket fit tightly by the conical surface again, so good cooling results, use is received the order long, can bear high-power electric current, and assemble easy to maintenance, through use confirming that effect is remarkable, can weld sheet materials such as the following aluminium alloy of the following stainless steel 2mm of 4mm, solved general indirect water-cooling but welding torch exist between topic.

Description of drawings:

Figure one is a but formula structure welding torch lower gun body partial graph of original indirect water-cooling

Figure two is direct water-cooling formula structure welding torch lower gun body partial graphs

Figure three is the utility model lower gun body partial graphs

Explanatory note among the figure:

1(1 ', 1 ") is a tungsten bar; 2(2 ', 2 ") is the arc of folding nozzle;

3(3 ") links nut; 4(4 ', 4 ") is a protective cover;

The 5th, insulator; 6(6 ', 6 ") is a cooling jacket;

7 " be sealing ring

I is that cooling water and back ground current input pipe II are protection gas input pipes

Embodiment:

Shown in figure three; the arc of folding nozzle 2 of welding torch lower gun body is made by red copper; upper/lower terminal is a cone; the conical surface of upper end and the inner conical surface of cooling jacket 6 are fitted; binding nut 3 is fixed tightly in it on cooling jacket 6 by the following conical surface of arc of folding nozzle 2; arc of folding nozzle center overlaps with tungsten bar 1, and cooling water and back ground current enter through the pipe I, and protection gas (argon gas) enters via the pipe II.

Claims

1, a kind of plasma arc welding torch; its lower gun body is by tungsten bar; cover on the arc of folding nozzle of tungsten bar lower end, the binding nut of fastening arc of folding nozzle; the protective cover that is enclosed within the lower gun body outside reaches the compositions such as cooling jacket that link to each other with the arc of folding nozzle with insulator, it is characterized in that arc of folding nozzle and cooling jacket directly combine by their conical surface.

2, plasma arc welding (PAW) welding torch according to claim 1 is characterized in that the arc of folding nozzle has upper and lower two conical surfaces, and the last conical surface and the cooling jacket conical surface fit, and the following conical surface is fixed tightly in it on cooling jacket by linking nut.