GB2059846A - Gas-shielded arc welding employing two separately supplied gases - Google Patents
Gas-shielded arc welding employing two separately supplied gases Download PDFInfo
- Publication number
- GB2059846A GB2059846A GB8032245A GB8032245A GB2059846A GB 2059846 A GB2059846 A GB 2059846A GB 8032245 A GB8032245 A GB 8032245A GB 8032245 A GB8032245 A GB 8032245A GB 2059846 A GB2059846 A GB 2059846A
- Authority
- GB
- United Kingdom
- Prior art keywords
- argon
- shielded arc
- arc welding
- welding
- nozzle
- 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.)
- Withdrawn
Links
- 238000003466 welding Methods 0.000 title claims abstract description 43
- 239000007789 gas Substances 0.000 title description 18
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 70
- 229910052786 argon Inorganic materials 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- 230000035515 penetration Effects 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
-
- 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)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The method employs CO2 and argon supplied to the welding site separately from, but simultaneously with, each other, the argon being conveyed as a central flow (2) to the melting point (3) of the consumable electrode (3a) to form a plasma arc, and the CO2 being conveyed as a sheath-like flow (4) to the welding site. A welding gun for carrying out the method has a head with a central annular nozzle (6) for the argon and an annular sheath- like nozzle (5) surrounding the central nozzle and serving for feeding the CO2. <IMAGE>
Description
SPECIFICATION
Shielded are welding method and gun
This invention relates to a shielded arc welding method and to a welding gun for carrying out said method, the method and the gun operating with CO, and argon as protective gases.
In the shielded arc welding methods and guns customary hitherto, and operating with CO, and argon, these two gases are supplied as a mixture to the welding gun and thus conveyed in the form of a mixture to the welding site.
In the known methods, the greater part of the gas (up to about 80%) is constituted by argon and this expensive argon makes the cost of the gas mixture relatively high.
In addition, the complete gas mixture conveyed to the gun does not enable the operations required for the welding method to be performed in the optimum manner.
The object of the invention is therefore to provide a shielded arc welding method, and a welding gun by which it may be carried out, improved such that with a considerable reduced proportion of argon and a greatly increased proportion of CO, the cost of the protective gas is reduced and that the operations for the performance of an optimum welding method are at the same time improved in that argon and CO, are conveyed to the welding site in a more satisfactorily planned manner.
In the method of the present invention, this object is achieved in that CO, and argon are supplied to the welding site separately from but simultaneously with each other, by conveying argon as a central flow to the wire melting point while CO, is supplied as a sheath-like flow for covering the melting bath and activating burning penetration at the welding site.
For carrying out the method of the invention there is provided a welding gun of which the head has a central annular nozzle for the flow of argon, a second annular sheath nozzle for the flow of CO, being positioned around the said first nozzle.
The method of the present invention, and the welding gun with which it is performed, enable each component of the protective gas to be supplied in the particular proportion appropriate to the welding method, thus ensuring that the two gases take effect in the zone of the weld in a more suitably planned manner.
Argon is conveyed direct to the wire melting point, as an ionization medium, thus ensuring steadier and more continuous detachment of the material.
CO, is conveyed as a covering flow to the welding site, for protection and for the activation of the penetration.
The separate (unmixed) supply of argon and CO, provides, in addition to the more accurately planned action of the two components of the gas, the considerable advantage that the proportion of argon can be greatly reduced and the proportion of CO, correspondingly increased. This provides the advantage of reducing the argon currently required to about 10-50%, so that by reason of the less expensive component represented by the CO, the cost of the protective gas has been thereby greatly reduced.
As a general principle, the method of the invention and its possibilities enable any desired proportion to be adopted between the CO, and the argon component of the gas, although certain particular percentages for the two components have been found most favourable from the point of view of welding technique.
The method of the present invention thus enables welding to be carried out more economically and does not necessitate the mixture of CO, and argon hitherto needed. In addition, the separate but simultaneous supply of the argon and CO, can be effected with a reliably operating welding gun which is of simple construction and which provides a means of performing the welding in a simple manner.
An example of the invention is described below in detail with reference to the accompanying drawing in which the single figure is a vertical longitudinal section through the head of the nozzle of a shielded arc welding gun.
The shielded arc welding method, according to the invention, is also known as metal and active gas welding, and operates with CO, (carbon dioxide) and argon as protective gases. The invention provides that these two gases are conveyed separately (unmixed) to the welding site 1, in such a way that argon is conveyed as a central flow 2 to the melting point 3 of the welding wire 3a, and CO, as a sheath-like flow 4 to the welding site 1 for the purpose of covering the melting bath and activating the penetration.
This separate supply of the CO, and the argon enables these two components of the gas to be supplied in any desired proportions, although in contradistinction to the conventional method using a mixture of gases, the proportion of argon can be reduced and the proportion of CO, increased. The ratio of the CO, to the argon can range from about 1:1 to about 10:1. The proportion of argon will preferably be between 10% and 50% of the proportion of Cho2, these having been found to be the most favourable proportions from the point of view of welding technique.
The ratio of the CO, to the argon can nevertheless also range from 6:1 to 7:1, preferred proportions being 80-85% CO, and only 1 5-20% argon.
The method is carried out with a welding gun of which the head 5 enables.the protective gases to be supplied separately from, but simultaneously with, each other. For this purpose, the head 5 of the gun has a central annular nozzle 6 from which argon emerges as a central flow 2. An annular sheath like nozzle, from which CO, emerges as a covering flow 4, is positioned around the said central annular nozzle 6.
Claims (7)
1. A shielded arc welding method, using CO, and argon, characterized in that C02 and argon are supplied to the welding site separately from but simultaneously with each other, argon being conveyed as a central flow to the wire melting point, and CO2 being conveyed as a sheath-like flow to the welding site for the purpose of covering the melting bath and activating the penetration.
2. A shielded arc welding method, as claimed in claim 1, wherein the proportion of CO, to argon ranges from about 1:1 to about 10:1.
3. A shielded arc welding method, as claimed in claim 1, wherein the proportion of argon is between 10% and 50% of the CO2.
4. A shielded arc welding method, as claimed in claim 1, wherein the proportion of CO, to argon is about 6-7:1.
5. A welding gun, for carrying out the shielded arc welding method claimed in claim 1, comprising a head having a central annular nozzle for argon and an annular sheath-like nozzle surrounding said central nozzle and serving for CO2.
6. A shielded arc welding method substantially as described herein with reference to the accompanying drawing.
7. A welding gun substantially as described herein with reference to the accompanying drawing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792941218 DE2941218A1 (en) | 1979-10-11 | 1979-10-11 | Mag arc welding gun using both argon and carbon di:oxide - where the proportion of argon can be reduced, thereby decreasing welding costs |
| DE19803019329 DE3019329A1 (en) | 1980-05-21 | 1980-05-21 | Mag arc welding gun using both argon and carbon di:oxide - where the proportion of argon can be reduced, thereby decreasing welding costs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2059846A true GB2059846A (en) | 1981-04-29 |
Family
ID=25781449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8032245A Withdrawn GB2059846A (en) | 1979-10-11 | 1980-10-07 | Gas-shielded arc welding employing two separately supplied gases |
Country Status (6)
| Country | Link |
|---|---|
| ES (2) | ES495822A0 (en) |
| FR (1) | FR2467042A1 (en) |
| GB (1) | GB2059846A (en) |
| IT (1) | IT1133152B (en) |
| NL (1) | NL8005487A (en) |
| SE (1) | SE8007001L (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6207923B1 (en) | 1998-11-05 | 2001-03-27 | Hypertherm, Inc. | Plasma arc torch tip providing a substantially columnar shield flow |
| FR2813544A1 (en) * | 2000-09-06 | 2002-03-08 | Air Liquide | PROCESS FOR MIG WELDING OF NICKEL AND NICKEL ALLOYS WITH ARGON AND CO2-BASED PROTECTION GAS |
| US6495798B1 (en) * | 2000-09-21 | 2002-12-17 | Lincoln Global, Inc. | Radial tube torch head |
| EP2380692A1 (en) * | 2010-04-23 | 2011-10-26 | Dinse G.m.b.H. | Protective gas connections or coatings with internal smoke extraction |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2027716A1 (en) * | 1969-01-03 | 1970-10-02 | Philips Nv | |
| JPS5220425B1 (en) * | 1969-09-04 | 1977-06-03 | ||
| DE2126553A1 (en) * | 1971-05-28 | 1972-12-07 | Kjellberg Esab Gmbh | Protective gas consumable electrode welding head - with additional outer protective gas sheath |
| NL7404120A (en) * | 1974-03-27 | 1975-09-30 | Philips Nv | METHOD AND DEVICE FOR ARC WELDING. |
-
1980
- 1980-10-03 NL NL8005487A patent/NL8005487A/en not_active Application Discontinuation
- 1980-10-03 IT IT25109/80A patent/IT1133152B/en active
- 1980-10-07 GB GB8032245A patent/GB2059846A/en not_active Withdrawn
- 1980-10-07 SE SE8007001A patent/SE8007001L/en not_active Application Discontinuation
- 1980-10-10 FR FR8021646A patent/FR2467042A1/en active Pending
- 1980-10-10 ES ES495822A patent/ES495822A0/en active Granted
-
1981
- 1981-08-01 ES ES1981259837U patent/ES259837Y/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6207923B1 (en) | 1998-11-05 | 2001-03-27 | Hypertherm, Inc. | Plasma arc torch tip providing a substantially columnar shield flow |
| FR2813544A1 (en) * | 2000-09-06 | 2002-03-08 | Air Liquide | PROCESS FOR MIG WELDING OF NICKEL AND NICKEL ALLOYS WITH ARGON AND CO2-BASED PROTECTION GAS |
| EP1186368A1 (en) * | 2000-09-06 | 2002-03-13 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | MIG welding method for Ni and Ni-alloys with Ar and CO2 based shielding gases |
| US6596971B1 (en) | 2000-09-06 | 2003-07-22 | L'air Liquide-Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for the MIG welding of nickel and nickel alloys with a shielding gas based on argon and CO2 |
| US6495798B1 (en) * | 2000-09-21 | 2002-12-17 | Lincoln Global, Inc. | Radial tube torch head |
| US6759623B2 (en) | 2000-09-21 | 2004-07-06 | Lincoln Global, Inc. | Radial tube torch head |
| EP2380692A1 (en) * | 2010-04-23 | 2011-10-26 | Dinse G.m.b.H. | Protective gas connections or coatings with internal smoke extraction |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8007001L (en) | 1981-04-12 |
| ES259837Y (en) | 1982-10-16 |
| FR2467042A1 (en) | 1981-04-17 |
| ES8200033A1 (en) | 1981-11-01 |
| ES259837U (en) | 1982-02-16 |
| NL8005487A (en) | 1981-04-14 |
| IT8025109A0 (en) | 1980-10-03 |
| IT1133152B (en) | 1986-07-09 |
| ES495822A0 (en) | 1981-11-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |