CN1126129A - Arc welding torch or arc cutting torch - Google Patents
Arc welding torch or arc cutting torch Download PDFInfo
- Publication number
- CN1126129A CN1126129A CN 94115239 CN94115239A CN1126129A CN 1126129 A CN1126129 A CN 1126129A CN 94115239 CN94115239 CN 94115239 CN 94115239 A CN94115239 A CN 94115239A CN 1126129 A CN1126129 A CN 1126129A
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- torch
- arc
- radiator
- overcoat
- electrode holder
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Abstract
The arc welding torch for welding or cutting comprises a torch body and an electrode fixture in it. In order to reduce heat load of torch and avoil sharp temp raising, a heat radiator whose thermal conductinbg coefficient is greater than that of fixture and casing is arranged between casing of torch and fixture.
Description
The present invention relates to a kind of welding torch or arc cutting torch of arc welding, comprise a welding torch body and an electrode holder that is used for electrode that is installed in its inside.
The main function components of liquid cooling or ventilation type arc torch and arc cutting torch comprises electrode, electrode holder, welding torch body and the housing that is used for the hold electrodes anchor clamps that constitutes in welding torch body inside.The welding torch body and the housing of known welding torch are made with non-ferrous metal usually, particularly use brass or red copper.The chuck of electrode holder or WIG (tungsten electrode Inert gas welding) or plasma torch and the nozzle of MIG/MAG welding torch are often made with red copper, wherein also have to adopt brass to make.The shortcoming of this known welding torch is, because the fluid of the big flow of thermic load needs of the high-intensity function of current and generation therefrom is used for the cooling of welding torch, and welding torch also will have the corresponding structure size.Particularly in the liquid-cooled welding torch, heat dissipation problem partly has been subjected to following condition effect: cooling medium can't be sent in the welding torch body in the bonding pad between welding torch inlet and welding torch body quantitatively.The heat that is produced can cause the strong intensification of torch head and handle in a word, makes the plastic insulating layer at torch head place melt.High thermic load also can cause the heavy wear of functional part, and then has reduced service life.
Task of the present invention is, develops a kind of above-mentioned arc torch or arc cutting torch, and it simple in structure, easy to manufacture can obviously reduce the thermic load of welding torch, avoids the strong temperature rise of torch head and handle.
The present invention to the solution of above task is, is provided with a radiator between the overcoat of welding torch body and electrode holder, and the thermal conductivity factor of its material is greater than the thermal conductivity factor of the material of electrode holder and overcoat.
For the heat that between electrode holder and electrode, produces, can realize heat conduction fast and effectively by the present invention owing to the loss power of transition resistance.This effect is to realize by the specific selection to the material thermal conductivity of radiator, electrode holder and overcoat.The mechanism that the present invention utilized is that heat always flows to the good conductor of heat from the non-conductor of heat.So because the thermal conductivity factor of radiator is higher, the heat that produces on the electrode holder will be directly passed to radiator, take away from the radiator liquid that is cooled then.Compare the effect that the overcoat with less thermal conductivity factor has played heat shield simultaneously this moment with radiator, it is overheated therefore the welding torch body to be produced.The temperature of finding in test handle is significantly less than desired standard, thereby has improved the operation of welding torch, has particularly improved the long-time welding operation of welding torch greatly.Owing to realized the optimization of conducting heat, also reduced the physical dimension of welding torch, so under essentially identical current capacity, can obtain more light welding torch.Otherwise, compare with known welding torch, owing to improved the cooling of welding torch, under same current strength, can prolong the service life of welding torch.
In liquid-cooled arc torch or arc cutting torch, according to a kind of scheme of the present invention, the thermal conductivity factor of the thermal conductivity ratio lagging material of the material of electrode holder is higher.Make the heat that is transmitted in fact concentrate on the radiator like this, do not have too much heat and be delivered to the external world, perhaps be delivered to handle etc. and locate.
In liquid-cooled arc torch or arc cutting torch, when carrying out the selection of material, radiator can be made by red copper, and electrode holder is made as brass by non-ferrous metal, and overcoat is made by stainless steel.
In ventilation type arc torch or arc cutting torch, particularly in the higher occasion of current capacity, the suggestion radiator surrounded by flowing protective gas and/or around, the pass between the material thermal conductivity of radiator, overcoat and electrode holder is χ
K＞χ
E, χ
A, be preferably χ
K＞χ
A＞χ
EDirectly pass to radiator at the heat that produces on the electrode holder this moment, is passed to the external world by being looped around radiator protective gas on every side then.Because the thermal conductivity factor of electrode holder is very little, so can avoid heat to pass to the welding torch rear portion.Compare with radiator, overcoat has littler thermal conductivity factor, thereby can guarantee that not having too much amount of residual heat will is delivered to the external world, and can avoid the fusing of welding torch head plastic insulating layer and the strong temperature rise of handle.
According to the present invention, in the ventilation type arc torch or arc cutting torch of high current capacity, radiator is made by red copper, and overcoat is made as brass by non-ferrous metal, and electrode holder is made by stainless steel.This material is selected to guarantee that the heat at electrode holder place is directly passed to radiator, and can be avoided heat to turn back to the welding torch head through electrode holder.The overcoat of being made by brass can also prevent that too much amount of residual heat will from passing to the welding torch head from overcoat.
According to the present invention, ventilation type arc torch or arc cutting torch that current capacity is lower, the welding torch below 200 amperes for example, its radiator and overcoat can be made one, and the pass between the material thermal conductivity of radiator/overcoat and electrode holder is χ
K/A＞χ
EThis little ampere welding torch is compared with big ampere welding torch, and its electric arc reflecting heat is not high, therefore adopting simple mode aspect manufacturing and the mounting process, radiator and overcoat is made one, and the heat conduction is carried out through this global facility.Radiator wherein and overcoat are made as brass by non-ferrous metal, and electrode holder is made by stainless steel, can realize between electrode holder and radiator that so effectively heat is transmitted.In case of necessity, all-in-one-piece radiator and overcoat also can have radially overhanging fin and/or longitudinal fin, projection or similar radiating surface, thereby the heat transfer that helps integrated part is carried out on bigger surface.Under any circumstance, the plastic insulating layer of the head that all can guarantee to dispel the heat does not take place overheated and decomposes, and handle is remained in the temperature standard of regulation.
According to another kind of scheme of the present invention, radiator welding torch vertically on separated several tactic circulation canals that holds cooling medium.Can very effectively heat be delivered to the cooling medium from radiator by the forced guiding of cooling medium in the runner that has prolonged.
According to the present invention, a kind of favourable structure constitutes circulation canal between radiator and overcoat.Circulation canal for example can be by radially overhanging and constitute with fin that overcoat joins, thereby further increased the heat transfer area of radiator.
According to a kind of special scheme of the present invention, circulation canal is interconnected through the opening along the circumference interlaced arrangement, thereby realizes cooling fluid rotary forced guiding in circulation canal, and reaches the available heat transmission to cooling medium.
Another kind of scheme of the present invention is specially adapted to MIG-MAG-welding torch, and its circulation canal is along torch axis shape extension in the shape of a spiral, thus simplified manufacturing technique.
In liquid-cooled arc torch of the present invention or arc cutting torch, the contact zone of the cooling fluid of liquid feeding side in mozzle is admitted to circulation canal between the electrode holder, and cooling fluid is introduced return duct towards the direction at welding torch rear portion.This structure can realize cooling fluid effectively and have the importing and the discharge of control, known welding torch cooling medium heated situation before reaching the hottest position then often to occur, so can not conduct heat with the degree that requires again.
According to the present invention, the another kind of mode that liquid-cooled arc torch or arc cutting torch are cooled off is, the cooling fluid of liquid feeding side enters a balancing gate pit, and the direction towards the welding torch rear portion flows into a cooling chamber from the balancing gate pit, and cooling chamber and return duct communicate.Set up a fluid pressure this moment in the balancing gate pit, cooling fluid is accelerated in cooling chamber, and is pressed towards the direction of gas nozzle.The acceleration of this cooling fluid can be played very effective conductive force.
Ventilation type welding torch of the present invention also has following structure, and radiator has a ring protection gas exhaust port with the electrode holder arranged concentric, and this exhaust outlet is connected with the circulation canal nearest apart from gas nozzle.
At last,, then can abandon adopting soldering linkage function parts, but according to suggestion of the present invention if the welding torch thermic load is less, with overcoat, radiator and/or where necessary electrode holder all make the interference fit part.The manufacturing expense of this interference fit part is lower, and has best sealing effectiveness.
Other purposes of the present invention, advantage, feature and purposes are seen example shown in the following drawings and explanation thereof.Wherein all are described and/or illustrated feature can constitute the solution of the present invention with any reasonable manner, are not subjected to the combination in the claims of these features or the constraint of quoting of claim.
Fig. 1 represents the longitudinal sectional view of ventilation type WIG welding torch of the present invention.
Fig. 2 represents the longitudinal sectional view of another kind of ventilation type WIG welding torch of the present invention.
Fig. 3 represents the longitudinal sectional view of liquid-cooled WIG welding torch of the present invention.
Fig. 4 represents the longitudinal sectional view of another kind of liquid-cooled WIG welding torch of the present invention.
The ventilation type WIG welding torch that Fig. 1 represents has 1, one overcoat 5 of a welding torch body, and this overcoat has constituted the housing 2 that holds radiator 6 and electrode holder 3.In the electrode holder 3 that constitutes as chuck, accompany electrode 4.Front end at overcoat 5 is equipped with an insulation sleeve 13, and this insulation sleeve has constituted the holder that metal gas nozzle 9 is installed.In order to improve the distribution situation that enters the protective gas of welding torch neck 15 through air inlet pipe 14, a gas lens 16 has been installed in the example of Fig. 1.There is a welding torch cover 17 end of the welding torch body 1 that is provided with on gas nozzle 9 opposites, and it will carry electrode 4 sealings of electric current.Welding torch body 1 is the same with welding torch neck 15 and torch-tip 9, all has plastic casing 18.
As shown in Figure 1, radiator 6 is arranged between overcoat 5 and the electrode holder 3, has constituted truncated conical support 19 simultaneously, this bearing be used for welding torch cover 17 between the chuck or the electrode holder 3 that are threaded.Radiator 6 has radially overhanging fin 11, and the outer radial periphery of this fin and overcoat 5 join and overcoat 5 has constituted the circulation canal 7 that welding torch longitudinally is disposed in order together.Circulation canal 7 is interconnected through the opening 24 (referring to Fig. 3) of circumferencial direction interlaced arrangement.Has an annular row gas port 10 that extends along the direction of gas lens 16 apart from gas nozzle 9 nearest circulation canals 7.The protective gas that enters welding torch neck 15 through air inlet pipe 14 enters gas lens 16 owing to the effect of circulation canal 7 rotates through exhaust outlet 10, sprays from welding torch through gas nozzle 9 from this then.
An essential characteristic of welding torch shown in Figure 1 is that the material of radiator 6 has the thermal conductivity factor χ higher than the material of electrode holder 3
K, the material of overcoat 5 also has the thermal conductivity factor χ higher than the material of electrode holder 3
ARelation between the thermal conductivity factor is: χ
K＞χ
A＞χ
ECan reach following effect by the different thermal conductivity factor of selecting the torch component material, the heat that produces owing to the transition resistance between electrode holder 3 and the electrode 4 is because of radiator 6 has higher thermal conductivity factor χ
KAnd directly be delivered on the radiator 6 from electrode holder 3.The overcoat 5 of welding torch body 1 is owing to have the thermal conductivity factor χ littler than radiator 6
A, and formed a thermal shield, thereby the heat that makes generation is from radiator 6 directly passes to protective gas as cooling medium, and is discharged to the external world.The prolongation of the flow path that causes owing to circulation canal 7 and therewith the increase of relevant protective gas contact area help carrying out the heat conduction from radiator 6.Welding torch body 1 and welding torch neck 15 are owing to the accumulation of amount of residual heat will causes the phenomenon of molten plastic cover 18 to avoid by the way, and the also unlikely violent intensification of handle itself.
What Fig. 2 represented is a ventilation type WIG welding torch equally, and its welding torch identical functions parts shown in Figure 1 that neutralize have identical label, therefore enumerates no longer one by one in specification.Welding torch shown in Figure 2 and the difference among Fig. 1 are, are designed to lower current capacity mode, and be for example about below 200 amperes.Because it is low that the reflecting heat of electric arc and big electric current welding torch are compared, so overcoat 5 and radiator 6 can be made one, material for example is a brass, and in the selected in the drawings example, 3 of electrode holders are made with stainless steel.Because radiator 6 is compared with electrode holder 3 with overcoat 5, has higher thermal conductivity factor χ
K/ASo heat spreads out of through the entire heat dissipation body, and the protective gas in the water conservancy diversion crack 20 on the electrode holder 3 of being flowed through takes the external world to.In addition, the integral body that is made of radiator 6 and overcoat 5 also has the fin 12 that extends radially outward, and it can increase surface area, and waste heat is derived and dispersion.This measure can be satisfied the requirement of the lower welding torch of relative current capacity, can protect and avoid the plastic layer 18 overheated and decomposition of torch head, makes the temperature of welding torch neck 15 and handle can not surpass specified standard.
Fig. 3 represents a liquid-cooled welding torch, and its structure and ventilation type welding torch shown in Figure 1 are similar, have a radiator 6 with stepped circulation canal 7.Enter contact zone between electrode holder 3 and the electrode 4 through cooling fluid that feed tube 21 is sent into circulation canal 7a and the flow-guiding channel 25 by sealing, enter the circulation canal 7b on gas nozzle 9 next doors then.Cooling fluid is passed the circulation canal 7 that is interconnected together by opening 24 again and is flowed towards the direction at welding torch rear portion, after return duct 8 drain.In selected example, overcoat 5 usefulness stainless steels are made, and radiator 6 is made by red copper, and electrode holder 3 usefulness brass are made.Functional part by selecting different materials and the welding torch body 1 that is brought different, the heat that thermal conductivity factor can make the tip of electrode holder 3 produce directly passes to radiator 6, and 6 of radiators are interior towards the mobile cooling fluids of welding torch posterior direction with heat transferred circulation canal 7.Overcoat 5 has less thermal conductivity factor χ
AIt constitutes a thermal shield, the heat that will spread out of is concentrated on the radiator 6, and by forcing guided in circulation canal 7, and because fin 11 has strengthened the contact area of radiator 6, make the heat of welding torch body 1 and welding torch neck 15 and handle be pulled away the temperature rise that unlikely appearance is bigger.
On the liquid-cooled WIG welding torch shown in Fig. 4, the label of its functional part is identical with corresponding parts label among Fig. 1, Fig. 3, therefore enumerates no longer one by one in specification.The main distinction of liquid-cooled WIG welding torch shown in Figure 4 is that radiator 6 has two cooling chambers.Cooling fluid enters balancing gate pit 22 through feed tube 21.Because the flowing pressure that produces in balancing gate pit 22 makes cooling fluid quicken to enter cooling chamber 23, and is pressed towards the direction of gas nozzle 9, is introduced to again in the return duct 8 then.Can realize very effectively conducting heat by the acceleration of cooling medium in cooling chamber 23.Radiator 6 in the example shown in Figure 4 is made by brass, and overcoat 5 is made by stainless steel, and electrode holder 3 is made by brass alloys, but the thermal conductivity factor χ of the brass alloys of electrode holder 3
EBe less than the thermal conductivity factor of the material of radiator 6.
The material that each part of welding torch 1 is selected to have different heat conductivilitys is not limited only to the WIG welding torch, and can be used for plasma torch, MIG/MAG welding and cutting welding torch.
The type of cooling through improving of welding torch 1 can also allow each part of welding torch 1 or radiator 6 and overcoat 5 are made the interference fit part, need not with they solderings together when assembling.
Claims (16)
1, arc torch or arc cutting torch, comprise a welding torch body (1) and the installation electrode holder that is used for holding electrode (4) (3) within it, it is characterized in that, between the overcoat (5) of welding torch body (1) and electrode holder (3), be provided with a radiator (6), the thermal conductivity factor χ of its material
KThermal conductivity factor greater than the material of electrode holder (3) and overcoat (5).
2, arc torch as claimed in claim 1 or arc cutting torch is characterized in that, the pass between the material thermal conductivity of radiator (6), electrode holder (3) and overcoat (5) is χ
K＞χ
E＞χ
A
3, arc torch as claimed in claim 1 or 2 or arc cutting torch is characterized in that, radiator (6) is made by red copper, and electrode holder (3) is made as brass by non-ferrous metal, and overcoat (5) is made by stainless steel.
4, arc torch as claimed in claim 1 or arc cutting torch; has air-cooling apparatus; it is characterized in that, radiator (6) surrounded by flowing protective gas and/or around, the pass between the material thermal conductivity of radiator (6), overcoat (5) and electrode holder (3) is χ
K＞χ
A, χ
E, be preferably χ
K＞χ
A＞χ
E
5, arc torch as claimed in claim 4 or arc cutting torch is characterized in that, radiator (6) is made by red copper, and overcoat (5) is made as brass by non-ferrous metal, and electrode holder (3) is made by stainless steel.
6, arc torch as claimed in claim 1 or arc cutting torch have air-cooling apparatus, it is characterized in that, radiator (6) and overcoat (5) are made one, and the pass between the material thermal conductivity of radiator/overcoat (5,6) and electrode holder (3) is χ
K/A＞χ
E
7, arc torch as claimed in claim 6 or arc cutting torch is characterized in that, radiator (6) and overcoat (5) are made as brass by non-ferrous metal, and electrode holder is made by stainless steel.
As any one described arc torch or arc cutting torch among the above-mentioned claim, it is characterized in that 8, radiator/overcoat (5,6) preferably has radially overhanging fin and/or longitudinal fin (12), projection or similar radiating surface.
9, as any one described arc torch or arc cutting torch among the above-mentioned claim, it is characterized in that, radiator (6) welding torch vertically on separated several tactic circulation canals (7) that holds cooling medium.
10, arc torch as claimed in claim 9 or arc cutting torch, it is characterized in that, the circulation canal 7 between radiator (6) and overcoat (5) preferably by fin (11) radially overhanging and that join with overcoat (5), projection or similarly radiating surface constitute.
11, arc torch as claimed in claim 10 or arc cutting torch is characterized in that, circulation canal (7) is interconnected through the opening (24) along the circumference interlaced arrangement.
As claim 10 or 11 described arc torch or arc cutting torch, it is characterized in that 12, circulation canal (7) is along torch axis shape extension in the shape of a spiral.
13, as any one described arc torch or arc cutting torch among the claim 9 to 12, has liquid cooling apparatus, it is characterized in that, the cooling fluid of liquid feeding side is through mozzle (25), be admitted to the contact zone in the circulation canal (7) between electrode holder (3) and the electrode (4), and cooling fluid introduced return duct (8) towards the direction at welding torch rear portion.
14, as any one described arc torch or arc cutting torch among claim 1 to 3 or 8, it is characterized in that, the cooling fluid of liquid feeding side enters a balancing gate pit (22), and the direction from the balancing gate pit towards the welding torch rear portion flows into a cooling chamber (23), and cooling chamber and return duct (8) communicate.
15, as any one described arc torch or arc cutting torch among the claim 9 to 12; has air-cooling apparatus; it is characterized in that; radiator (6) has a ring protection gas exhaust port (10) with electrode holder (3) arranged concentric, and this exhaust outlet is connected with the circulation canal (7) nearest apart from gas nozzle (9).
16, as any one described arc torch or arc cutting torch among the above-mentioned claim, it is characterized in that, overcoat (5), radiator (6) and/or where necessary electrode holder (3) all make the interference fit part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94115239A CN1074333C (en) | 1994-09-20 | 1994-09-20 | Arc welding torch or arc cutting torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94115239A CN1074333C (en) | 1994-09-20 | 1994-09-20 | Arc welding torch or arc cutting torch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1126129A true CN1126129A (en) | 1996-07-10 |
| CN1074333C CN1074333C (en) | 2001-11-07 |
Family
ID=5037438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94115239A Expired - Lifetime CN1074333C (en) | 1994-09-20 | 1994-09-20 | Arc welding torch or arc cutting torch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1074333C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105312748A (en) * | 2014-07-31 | 2016-02-10 | 张建生 | Strengthening type electrode clamp |
| CN108213673A (en) * | 2016-12-09 | 2018-06-29 | 林肯环球股份有限公司 | The plasma cutting-torch of angulation |
| CN110114615A (en) * | 2016-12-30 | 2019-08-09 | 威克特设备公司 | Welding torch with integral type flash-back arrestor and thermal cut-out device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2659797A (en) * | 1951-03-01 | 1953-11-17 | Air Reduction | Arc welding apparatus |
| US2863984A (en) * | 1957-05-31 | 1958-12-09 | Union Carbide Corp | Gas shielded arc torches |
-
1994
- 1994-09-20 CN CN94115239A patent/CN1074333C/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105312748A (en) * | 2014-07-31 | 2016-02-10 | 张建生 | Strengthening type electrode clamp |
| CN108213673A (en) * | 2016-12-09 | 2018-06-29 | 林肯环球股份有限公司 | The plasma cutting-torch of angulation |
| CN108213673B (en) * | 2016-12-09 | 2021-11-09 | 林肯环球股份有限公司 | Angled plasma cutting torch |
| CN110114615A (en) * | 2016-12-30 | 2019-08-09 | 威克特设备公司 | Welding torch with integral type flash-back arrestor and thermal cut-out device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1074333C (en) | 2001-11-07 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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Expiration termination date: 20140920 Granted publication date: 20011107 |