CN102626816B

CN102626816B - Water-cooled welding gun for molten gas bath coupling active TIG welding

Info

Publication number: CN102626816B
Application number: CN201110393665.XA
Authority: CN
Inventors: 黄勇; 郝延召; 刘瑞琳
Original assignee: Lanzhou University of Technology
Current assignee: Lanzhou University of Technology
Priority date: 2011-12-01
Filing date: 2011-12-01
Publication date: 2014-07-09
Anticipated expiration: 2031-12-01
Also published as: CN102626816A

Abstract

The invention discloses a water-cooled welding gun for molten gas bath coupling active TIG (tungsten inert gas) welding. An inner gas vent is formed at the centre of the upper part of a gun body (4); a cooling water tank (b) is arranged inside the gun body; a gas chamber (f) for inflating outer gas is arranged at the lower part of the gun body; an outer gas inlet (a), a cooling water inlet (e) and a cooling water outlet (c) are formed on the side surface of the gun body; a gun body sealing screw cap (3) for sealing the cooling water tank (b) of the gun body is arranged on the gun body; a tungsten electrode clamp (9) is arranged inside a contact tip (6); an inner nozzle (11) is connected with the lower end of the contact tip (6) through the thread; the contact tip (6) is connected to the lower part of the gun body (4); the outer nozzle (10) is connected to the outer part of the gun body (4) through the thread; two gas sifters (7and 8) are sleeved outside the contact tip (6); an outer gas pipe connector (1) is connected to the side surface of the gun body (4); a cooling water pipe connector (2) is installed on upper of the side surface of the gun body (4); and a hydroelectric integrated pipe connector (5) is installed on lower of the side surface of the gun body (4).

Description

For the water cooled welding torch of coupling active TIG welding of gas weld pool

Technical field

The present invention relates to active welder.

Background technology

Argon tungsten-arc welding, it is TIG weldering (Tungsten Inert Gas welding), it is a kind of welding method extensively adopting during modern industry is manufactured, there is good welding quality, but also there is obvious limitation in the method, be that welding penetration is shallow, single track welding penetration is generally below 3mm, and this has restricted its application to a certain extent.Proposition take A-TIG weldering (Activating flux TIG welding) as the active welding method of representative, not only fully retain the advantage of argon tungsten-arc welding, and can make fusion penetration be multiplied by introduce active element in conventional TIG weldering process, cause extensive concern both domestic and external.In active welding, the mechanism that active element increases fusion penetration mainly contains two, is respectively that arc constriction is theoretical and the change of molten pool metal surface tension temperature coefficient is theoretical.For the ferroalloy materials such as stainless steel, carbon steel, more and more research shows, the dominant mechanism that its fusion penetration increases is that molten pool metal surface tension temperature coefficient changes theory.

The introducing mode different according to active element, existing active TIG welding method is mainly divided into three types: the first is to introduce active element O by the activating agent that contains active element O being coated in to welding bead to be welded surface before conventional TIG weldering; The second is to introduce active element O by active gases carbon dioxide or oxygen; The third is the electric arc auxiliary activity TIG soldering method that Lanzhou University of Science & Technology proposes; by before conventional TIG weldering using the mist of active gases and inert gas as protective gas; adopt little electric current tungsten electrode arc fritting welding bead Surface Creation to be welded layer of oxide layer, play the effect of activating agent.Although these three kinds of methods all can make fusion penetration significantly increase, but in actual applications, first kind method need to be developed different activating agents for different base metals, and conventionally need to adopt manual brushing activating agent in producing, and this has not only increased cost but also reduced production efficiency and technology stability.In Equations of The Second Kind method; if adopt active mist directly to carry out molten bath protection; the content of the active component carbon dioxide in mist or oxygen need to be controlled in 0.1% one 0.3% very low scope; this needs the gas proportioning device that precision is very high; and there is tungsten electrode oxidative phenomena, make the tungsten electrode lost of life.The 3rd class methods, due to two electric arcs of needs, cause energy-saving effect not good enough, also likely make equipment investment increase or production efficiency lower than the second active element introducing method.

Summary of the invention

The object of this invention is to provide a kind of water cooled welding torch for coupling active TIG welding of gas weld pool.

The present invention is the water cooled welding torch for coupling active TIG welding of gas weld pool, there is a rifle body 4, the centre on the top of rifle body 4 arranges an internal layer gas vent hole, bosh b is set in rifle body, bottom arranges the air chamber f that imports outer gas, rifle body side surface arranges outer gas air admission hole a and cooling water inlet hole e, the cooling water c that portals, there is a rifle body sealing nut 3 for sealer gun body bosh b, the interior placement tungsten electrode of ignition tip 6 chuck 9, inner nozzle 11 is connected with the lower end of ignition tip 6 by screw thread, ignition tip 6 is connected to the bottom of rifle body 4, outer nozzle 10 is threaded connection the outside at rifle body 4, two air sifters 7, 8 are enclosed within ignition tip 6 outsides, boss by the boss outside ignition tip and air chamber inside is fixing up and down, outer flue joint 1 is connected to rifle body 4 sides, be arranged on rifle body 4 side upper positions for the cooling water pipe joint 2 of deriving cooling water, be arranged on rifle body 4 side lower positions for the water-electricity integrated pipe joint 5 conducting electricity and import cooling water.

The present invention has the following advantages:

1, the present invention can regulate the coupling area of outer gas and weld pool surface easily and effectively.

2, between the inner nozzle in the present invention and ignition tip, ignition tip and rifle body, outer nozzle and rifle body, all connect by fine thread, centering is good, and tungsten electrode and inner and outer nozzles are changed convenient.

3, the type of cooling of the present invention is water-cooled, and bosh is arranged in rifle body, and cooling water enters bosh by lower position, discharges from higher position, is conducive to fully fill up bosh, and the contact area of increase and rifle body, can play good cooling effect.

4, the present invention is simple in structure, compact, easy to operate, can realize full-automatic production.

Accompanying drawing explanation

Fig. 1 is welding gun lance body structure schematic diagram, Fig. 2 welding gun structure schematic diagram.

The specific embodiment

As Fig. 1, shown in Fig. 2, the present invention is the water cooled welding torch for coupling active TIG welding of gas weld pool, there is a rifle body 4, the centre on the top of rifle body 4 arranges an internal layer gas vent hole, bosh b is set in rifle body, bottom arranges the air chamber f that imports outer gas, rifle body side surface arranges outer gas air admission hole a and cooling water inlet hole e, the cooling water c that portals, there is a rifle body sealing nut 3 for sealer gun body bosh b, the interior placement tungsten electrode of ignition tip 6 chuck 9' inner nozzle 11 is connected with the lower end of ignition tip 6 by screw thread, ignition tip 6 is connected to the bottom of rifle body 4, outer nozzle 10 is threaded connection the outside at rifle body 4, two air sifters 7, 8 are enclosed within ignition tip 6 outsides, boss by the boss outside ignition tip and air chamber inside is fixing up and down, outer flue joint 1 is connected to rifle body 4 sides, be arranged on rifle body 4 side upper positions for the cooling water pipe joint 2 of deriving cooling water, be arranged on rifle body 4 side lower positions for the water-electricity integrated pipe joint 5 conducting electricity and import cooling water.

The present invention adopts inside and outside two-layer gas to carry out molten bath protection, and internal layer gas is argon gas or helium, plays the effect in protection molten bath; Outer gas is the active gases and pure gas or the mist of nitrogen that this class of carbon dioxide and oxygen contains active element O, can introduce individually or simultaneously O element and N element, plays the effect that increases fusion penetration and raising weldquality.Can regulate the amount that enters O element in molten pool metal or N element by trace by the degree of coupling that regulates outer gas and molten bath, reach the object of controlling appearance of weld and weldquality.

As shown in Figure 1 and Figure 2, ignition tip 6 is threaded connection in the bottom of rifle body 4, and outer nozzle 10 is threaded connection the outside at rifle body 4.

As shown in Figure 1, in the axial line OO ' direction of rifle body 4, the position at cooling water inlet hole e place is lower than the portal position at c place of cooling water.The lower position at cooling water inlet hole e place enters bosh, discharges from the portal higher position at c place of cooling water, is conducive to fully fill up bosh, increases and the contact area of rifle body, can play good cooling effect.

Claims

1. for the water cooled welding torch of coupling active TIG welding of gas weld pool, there is a rifle body (4), the centre that it is characterized in that the top of rifle body (4) arranges an internal layer gas vent hole, bosh (b) is set in rifle body, bottom arranges the air chamber (f) that imports outer gas, rifle body side surface arranges outer gas air admission hole (a) and cooling water inlet hole (e), cooling water portal (c), there is a rifle body sealing nut (3) for sealer gun body bosh (b), in ignition tip (6), place tungsten electrode chuck (9), inner nozzle (11) is connected with the lower end of ignition tip (6) by screw thread, ignition tip (6) is connected to the bottom of rifle body (4), outer nozzle (10) is threaded connection the outside in rifle body (4), two air sifters (7, 8) be enclosed within ignition tip (6) outside, boss by the boss outside ignition tip and air chamber inside is fixing up and down, outer flue joint (1) is connected to rifle body (4) side, be arranged on rifle body (4) side upper position for the cooling water pipe joint (2) of deriving cooling water, be arranged on rifle body (4) side lower position for the water-electricity integrated pipe joint (5) conducting electricity and import cooling water.