CN101528405B - Welding torch for gas-shielded welding - Google Patents
Welding torch for gas-shielded welding Download PDFInfo
- Publication number
- CN101528405B CN101528405B CN2007800393494A CN200780039349A CN101528405B CN 101528405 B CN101528405 B CN 101528405B CN 2007800393494 A CN2007800393494 A CN 2007800393494A CN 200780039349 A CN200780039349 A CN 200780039349A CN 101528405 B CN101528405 B CN 101528405B
- Authority
- CN
- China
- Prior art keywords
- gas
- welding
- valve
- protective gas
- welding torch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000003466 welding Methods 0.000 title claims abstract description 76
- 230000001681 protective effect Effects 0.000 claims description 64
- 239000000463 material Substances 0.000 abstract description 3
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 239000004411 aluminium Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 109
- 230000000903 blocking effect Effects 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N Acetylene Chemical compound C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 241001672694 Citrus reticulata Species 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/28—Supporting devices for electrodes
- B23K9/29—Supporting devices adapted for making use of shielding means
- B23K9/291—Supporting devices adapted for making use of shielding means the shielding means being a gas
- B23K9/295—Supporting devices adapted for making use of shielding means the shielding means being a gas using consumable electrode-wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The feeding of shielding gas to the torch in MIG, MAG and TIG welding takes place by means of a separate supply line, the control of the stream of shielding gas taking place by means of a solenoid valve. This solenoid valve is generally in the so-called wire feed box. Between the wire feed box and the nozzle assembly of the torch there is generally a gas supply line a few metres long, in which foreign matter such as air or moisture accumulates during breaks in work and impairs the welding result when materials that are particularly sensitive to gas are used, in particular aluminium or aluminium alloys. The invention proposes a novel welding torch for gas-shielded welding, in which a shielding gas line (19) with a built-in shut-off valve (20, 35) is arranged in the nozzle assembly (5, 30) or in the torch barrel (4). The shut-off valve is preferably a nonreturn valve or a pressure-maintaining valve, with which a predetermined positive pressure of shielding gas with respect to the surrounding atmosphere is ensured in the shielding gas supply line. The flow shut-off device directly ahead of the gas outlet on the nozzle assembly reliably avoids the concentration of foreign matter inside the shielding gas supply line.
Description
Technical field
The present invention relates to a kind of device that is used for protective gas welding, have a tubular welding torch body, this welding torch body comprises that a gas supply part divides the axle that on gas supply part divides, is connected with, feeding one gas supply pipe road in the gas supply part branch; The nozzle carrier that also has a setting on the axle of welding torch body; This nozzle carrier comprise one be used for a welding rod contact tip and be used for the gas nozzle of a protective gas, wherein welding rod passes in a core pipe that the welding torch body is directed to contact tip and a protective gas is directed to the gas nozzle in the nozzle carrier by the gas supply pipe road.
Background technology
Such device is known as the protective gas welder according to DIN 1910 for example, and in Metallic Inert Gas welding (MIG), metal active gas welding (MAG) or WIG (Wolfram Inert Gas welding), uses especially.These nozzle carriers are provided with the protective gas nozzle that usually is provided with around the welding tip of reality with one heart at outlet side.Through the protective gas nozzle with in an inert gas or the active gases input service zone and guarantee on the surface of workpiece to be processed to constitute a protective gas cover there.The protective gas nozzle of nozzle carrier via an input channel with a protective gas source, for example the pressurization-gas cascade fluid of a storing therein corresponding protection gas is communicated with.Protective gas stream is that a magnet valve is realized by means of a blocking mechanism, great majority through the control of input channel usually, and it is arranged in the so-called welding rod feeding box at the some spacings place from nozzle carrier usually.Manipulation through magnet valve opens or closes protective gas stream; Stream time and/or back stream time before also being provided with one in many cases.In the said time, supply with protective gas before the welding job of surface of the work begins or after finishing.Intend whereby and in the duration of welding job, guarantee a uniform protective gas cover.
In long input channel, on blocking mechanism, produce very big stagnation pressure, it causes the undesirable strong gas stream that passes through input channel via the long time when welding process begins.In order to weaken the effect of stagnation pressure, advise that in DE 29708396U1 the measuring jet of a choke valve pattern also is set, and it is arranged in the supply unit and/or welding rod transport of welder usually in the protective gas pipeline except that blocking mechanism.This measuring jet is connected with a device for pressure measurement on blocking mechanism via a flow regulator, and the inflow of limiting protecting gas doughtily more, and the pressure on the blocking mechanism is high more.
According to the welder of prior art common be between the magnet valve of regulating welding gas stream and welding torch, to have several meters long gas supply pipe road.In this gas supply pipe road and in the inner chamber of welding torch body itself, between working interval, possibly invade undesirable foreign matter such as moisture, aerial oxygen or atmospheric nitrogen.These foreign matters influence the composition of the protective gas cover on the workpiece and thus especially under the situation of the material of gas sensitization, especially cause the significant infringement of welding result under the situation at aluminum or aluminum alloy when reusing welder.
In order to eliminate this problem, in DE 10357286A1, advise, in the gas supply pipe road that is used for to welding torch supply protective gas one back-flow preventer is set.Back-flow preventer relates to a for example spring-biased valve.Though guarantee that whereby the gas supply pipe road prevents the intrusion of said foreign matter to a considerable extent, possible all the time, moisture and air accumulation are in welding torch body itself.Since special when welding process begins for example in work when intermittently later welding process begins; The pressure of leading the protective gas that comes via the gas supply pipe road remains quite little, and the deal of the foreign matter during the material that correspondingly from the gas nozzle of welding torch, is flowing out with it in this stage flows is very high.
Summary of the invention
The objective of the invention is in view of the above, a kind of protective gas welder is provided, it can constitute a protective gas cover, does not also have foreign matter basically even it is right after after work intermittently, like moisture, aerial oxygen or atmospheric nitrogen.
This purpose reaches in the device of beginning said pattern and purposes like this, and promptly a protective gas pipeline extends through the inside of welding torch body between gas supply pipe road and gas nozzle, in this protective gas pipeline, be provided with one be used for protective gas locking-valve.
Therefore according to the present invention at the independent pipeline that is used for protective gas of the set inside of welding torch body and/or nozzle carrier one; One locking-valve is set in this pipeline, also therefore stops the intrusion of air or moisture by means of locking-valve latch-up protection gas pipeline when work intermittently begins.And locking-valve is protected in the inside of welding torch on the one hand, and it does not hinder the desired flexibility in gas supply pipe road on the other hand.Locking-valve can relate to a magnetic force, electric power or pneumatically-operated element to this.
This advantageously be arranged on locking-valve in the nozzle carrier or the axle of welding torch body in so that can the latch-up protection gas pipeline and as far as possible fully prevent the intrusion of air or moisture.
Favourable further formation of the present invention is set, and the protective gas pipeline constitutes the circulating line of the core pipe setting of a substantially concentric ground boxing bar at least in part, and block of valve valve is set therein.Locking-valve fixedly constitutes annular plate valve and can for example be integrated in the gas nozzle of nozzle carrier.
Preferably one check-valves or a pressure maintaining valve are set as locking-valve.In a check-valves, prevention is flowed in contrast to any of flow direction of the setting of protective gas.Under the situation of a pressure maintaining valve, locking-valve locking under the minimum superpressure predetermined of the inside of protective gas pipeline with respect to environmental pressure.Protective gas is present in the protective gas pipeline with superpressure constantly under above-mentioned situation, when opening pressure maintaining valve since this superpressure flow out rapidly keep gas and get rid of fast and reliably possibly occur still be in the foreign matter in the mentioned nozzle area.Therefore, welding process needn't at first wait for when beginning via gas supply pipe road build-up pressure, so that in the working region, set up a uniform protective gas cover.
Preferred pressure maintaining valve constitutes at this in this wise, makes in the protective gas service, to guarantee minimum superpressure 0.2 crust with respect to environmental pressure.But pressure maintaining valve also can constitute in this wise, makes it possible to free adjustment one superpressure arbitrarily.
Description of drawings
Illustrate in greater detail one embodiment of the present of invention by accompanying drawing.Illustrate with sketch map:
Fig. 1: one according to the longitudinal section of first form of implementation of the previous section of the device that is used to weld of the present invention with
Fig. 2 a: nozzle head according to another form of implementation of device of the present invention.
The specific embodiment
In device shown in Figure 11, relate to one and be used for the welding torch that MIG/MAG welds.This device 1 comprises a welding torch body 2, and it has a gas supply part and divides 3 and one neck 4, and a nozzle head 5 is set above that.In gas supply part divided 3 zone, a gas inlet pipe road 6 was passed in the welding torch body 2, one protective gas is imported to the inside of the welding torch body 2 of tubular formation here through said gas inlet pipe road from a unshowned protective gas source.Protective gas realizes by means of a magnet valve to the metering in gas inlet pipe road 6, and it is arranged in the so-called welding rod feeding box with known and unshowned here mode, and it is in several meters away from the working region of device 1 usually.Therefore gas inlet pipe road 6 has several meters length.A welding rod 7 roughly extends through the inside of welding torch body 2 at the center in addition, and said welding rod is supplied with guiding in the core pipe 8 at a welding rod.In pressing the embodiment of Fig. 1, device 1 relates to a handheld instrument, and gas supply part divides 3 also to comprise leader 9.Under the situation of a mechanical welder, the gas supply part branch consist essentially of one be used to connect gas inlet pipe road 6 joint.
Divide at gas supply part in gas inlet pipe road 6 between the gas feed 13 of feeding mouth 18 and nozzle head on 3 a protective gas pipeline 19 is set, protective gas is directed to gaseous diffuser 12 through it, and does not get into remaining inner chamber of welding torch body 2 simultaneously.In protective gas pipeline 19, a blocking element 20 is set in the zone of welding torch axle 4.In pressing the embodiment of Fig. 1; That this blocking element relates to is one pneumatic, the pressure maintaining valve of electric power or operated by magnetic force; It is lower than in protective gas pipeline 19 with respect to the limit superpressure of confirming of device 1 environmental pressure the time stream of locking automatically through the protective gas pipeline, but again that it is open when being higher than limit superpressure.
Before welding job begins, at first open the magnet valve and the protective gas that in welding rod feeding box, are provided with and flow to gas inlet pipe road 6.For example be higher than environmental pressure 0.2 crust if limit superpressure reaches, then blocking element 20 open and the outlet 17 inflow working regions of protective gas via gaseous diffuser 12 and nozzle head 5 in.After the end-of-job or in a job intermittently the time, the locking that gas becomes a mandarin through the magnet valve in the welding rod feeding box is stopped.Pressure in the protective gas pipeline 19 descends gradually.If be lower than limit superpressure, then blocking element 20 is by locking.In protective gas pipeline 19, keep the for example superpressure of 0.2 crust that continues thus.Therefore surrounding air or moisture can not be invaded in protective gas pipeline 19 or the gas inlet pipe road 6.If restart intermittently termination of welding job or work, then protective gas from gas inlet pipe road 6 inflow protective gas pipelines 19, causes the superpressure that oversteps the extreme limit again thus.Because protective gas has had superpressure in protective gas pipeline 19, in the working region, set up a uniform protective gas cover of forming by protective gas soon.Protective gas is extruded a spot of interior air and moisture in zone that has accumulated in the outlet 17 of nozzle carrier 5 rapidly and reliably.Thereby the flushing that the long period in do not need protection gas pipeline 19 or gas inlet pipe road 6 continues just can restart actual welding job soon.
In pressing the embodiment of Fig. 2, blocking element is arranged in the zone of nozzle head 30 of a welding torch.With as in press the embodiment of Fig. 1 identical mode, nozzle head 30 comprises a contact tip 32, it surrounds rabbets a welding rod 31.Contact tip 32 is contained in the gaseous diffuser 33, and it is spaced apart and radially surrounded by a sleeve 34 through an annular gap again.Gaseous diffuser 33 is communicated with the cavity fluid of welding torch body 37 in pressing the embodiment of Fig. 2.But be similar to as in embodiment, also can be connected in an independent protective gas pipeline 19 by Fig. 1.Integrated one magnet valve 35 that here only schematically illustrates in gaseous diffuser 33.Magnet valve 35 with as the previous blocking element 20 identical modes of describing be used for be lower than one confirm the limit superpressure time latch-up protection gas flowing and interrupt towards the direction of the outlet 36 of nozzle head 30 towards any gas stream of the direction of welding torch body 37.In the embodiment of Fig. 2, the outlet 36 that is in close proximity to nozzle head 30 realizes separating between protective gas and the ambient atmosphere.The amount of air or moisture is few especially whereby, and said air or moisture possibly built up in the stream of protective gas under job situation intermittently.
Through according to device of the present invention, reduce the infringement of air or moisture significantly to a workpiece to be processed.Especially special protection weld seam initiation region.Aspect welding result, improve the quality greatly thus, need few additional processing and reduce waste product.The present invention is not limited in MIG or MAG welder, use certainly, and can in WIG or plasma welding device, use equally.The present invention also is applicable to not only manual but also mechanically operated welder.
List of numerals
1 device, 16 flow orifices
17 outlets of 2 welding torch bodies
3 gas supply parts divide 18 to feed a mouthful (gas inlet pipe road
4)
5 nozzle heads, 25 19 protective gas pipelines
6 gas inlet pipe roads, 20 blocking elements
7 electric weldings, 30 nozzle heads
8 welding rods are supplied with core pipe 31 welding rods
9 handles, 32 contact tips
10 30 33 gaseous diffusers
11 contact tips, 34 sleeves
12 gaseous diffusers, 35 magnet valves
13 gas feeds, 36 outlets
14 sleeves, 37 welding torch bodies
15
Claims (3)
1. the device that is used for protective gas welding, said device comprise a tubular welding torch body, and this welding torch body comprises spool (4) that a gas supply part branch (3) and is connected on gas supply part branch (3), and a gas supply pipe road (6) is passed in the said gas supply part branch; Said device also comprises one at the last nozzle carrier (5,30) that is provided with of the axle (4) of welding torch body (2), and this nozzle carrier comprises that one is used for welding rod (7; 31) contact tip (11,32) and is used for the gas nozzle (12,33) of protective gas; Wherein welding rod (7,31) passes welding torch body (2,37) and is directed to contact tip (11 in a core pipe (8); 32) and a protective gas be directed to the gas nozzle (12,33) in the nozzle carrier (5,30) by gas supply pipe road (6); Wherein, a protective gas pipeline (19) extends through welding torch body (2 between gas supply pipe road (6) and gas nozzle (12,33); 37) inside, in protective gas pipeline (19), be provided with one be used for protective gas locking-valve (20,35); It is characterized in that locking-valve (20,35) is arranged on nozzle carrier (5; 30) in or be arranged in the axle (4) of welding torch body (2,37), and be to be set to pressure maintaining valve.
2. according to the described device of claim 1; It is characterized in that protective gas pipeline (19) constitutes the core pipe (8) and/or the contact tip (11 of substantially concentric ground boxing bar (7,31) at least in part; 32) circulating line that is provided with is provided with said locking-valve (35) in said circulating line.
3. according to claim 1 or 2 described devices, it is characterized in that pressure maintaining valve constitutes in this wise, make in protective gas service (19), guarantee 0.2 the crust minimum superpressure.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006056047.7 | 2006-11-28 | ||
| DE200610056047 DE102006056047A1 (en) | 2006-11-28 | 2006-11-28 | Welding torch for inert gas welding |
| PCT/EP2007/062254 WO2008064995A1 (en) | 2006-11-28 | 2007-11-13 | Welding torch for gas-shielded welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101528405A CN101528405A (en) | 2009-09-09 |
| CN101528405B true CN101528405B (en) | 2012-07-18 |
Family
ID=39156708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800393494A Expired - Fee Related CN101528405B (en) | 2006-11-28 | 2007-11-13 | Welding torch for gas-shielded welding |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2097206A1 (en) |
| CN (1) | CN101528405B (en) |
| DE (1) | DE102006056047A1 (en) |
| WO (1) | WO2008064995A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202016103382U1 (en) | 2016-06-27 | 2016-07-13 | Cisma Solutions Aps | Welding device and a machined by the welding tailpipe |
| CN107984059A (en) * | 2017-11-16 | 2018-05-04 | 西南交通大学 | A kind of packless high conductivity anaerobic fine copper welder and welding method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4130109A1 (en) * | 1990-09-18 | 1992-03-19 | Fronius Schweissmasch | Portable arc welder - with cut=off valve near handwelding unit to prevent excessive waste of protective gas when welding stops |
| CN2101551U (en) * | 1991-10-29 | 1992-04-15 | 温铁流 | Self-cold type co2 gas protector welding gun |
| DE29708396U1 (en) * | 1996-05-24 | 1997-08-28 | Hoffmann, Hans, Ing., Salzburg | Inert gas welding device |
| CN2654268Y (en) * | 2003-09-20 | 2004-11-10 | 大连理工大学 | New type welding gun nozzle |
| EP1537936A1 (en) * | 2003-12-05 | 2005-06-08 | K.B. Schweissmaschinen Vermietung und Vertrieb GmbH | Gas shielding arc welding apparatus with a back draught security device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7113984U (en) * | 1971-04-10 | 1971-12-16 | Sewing K | Welding gun for inert gas welding |
| JP2000312972A (en) * | 1999-04-26 | 2000-11-14 | Honda Motor Co Ltd | Torch for consumable electrode type gas shield arc welding |
| DE10200942A1 (en) * | 2002-01-12 | 2003-07-17 | Daimler Chrysler Ag | Welding burner comprises a feed unit with one end facing a contact pipe having a conical tip having a slope gradient corresponding to the slope gradient of the conical extension in the bore of the contact pipe |
| DE202004003178U1 (en) * | 2004-03-02 | 2004-05-19 | KRÜGER, Ralf | Automatic shielding gas cut off device, useful in shielding gas pipeline in TIG-welding, comprises supply lines for current, shielding gas, cooling water, switch cable |
-
2006
- 2006-11-28 DE DE200610056047 patent/DE102006056047A1/en not_active Ceased
-
2007
- 2007-11-13 WO PCT/EP2007/062254 patent/WO2008064995A1/en active Application Filing
- 2007-11-13 CN CN2007800393494A patent/CN101528405B/en not_active Expired - Fee Related
- 2007-11-13 EP EP07822528A patent/EP2097206A1/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4130109A1 (en) * | 1990-09-18 | 1992-03-19 | Fronius Schweissmasch | Portable arc welder - with cut=off valve near handwelding unit to prevent excessive waste of protective gas when welding stops |
| CN2101551U (en) * | 1991-10-29 | 1992-04-15 | 温铁流 | Self-cold type co2 gas protector welding gun |
| DE29708396U1 (en) * | 1996-05-24 | 1997-08-28 | Hoffmann, Hans, Ing., Salzburg | Inert gas welding device |
| CN2654268Y (en) * | 2003-09-20 | 2004-11-10 | 大连理工大学 | New type welding gun nozzle |
| EP1537936A1 (en) * | 2003-12-05 | 2005-06-08 | K.B. Schweissmaschinen Vermietung und Vertrieb GmbH | Gas shielding arc welding apparatus with a back draught security device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008064995A1 (en) | 2008-06-05 |
| DE102006056047A1 (en) | 2008-05-29 |
| CN101528405A (en) | 2009-09-09 |
| EP2097206A1 (en) | 2009-09-09 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120718 |