JPH0252173A - Heat input control welding method - Google Patents
Heat input control welding methodInfo
- Publication number
- JPH0252173A JPH0252173A JP20166688A JP20166688A JPH0252173A JP H0252173 A JPH0252173 A JP H0252173A JP 20166688 A JP20166688 A JP 20166688A JP 20166688 A JP20166688 A JP 20166688A JP H0252173 A JPH0252173 A JP H0252173A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- carbon dioxide
- liquid carbon
- heat
- heat input
- 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.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 14
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 20
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 235000011089 carbon dioxide Nutrition 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 3
- 206010070834 Sensitisation Diseases 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000008313 sensitization Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、薄鋼板構造物、オーステナイト系ステンレス
鋼、アルミニュームなどのガスシールドアーク溶接に好
適な入熱制御溶接方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat input control welding method suitable for gas-shielded arc welding of thin steel plate structures, austenitic stainless steel, aluminum, etc.
従来の薄鋼板構造物、オーステナイト系ステンレス鋼、
アルミニュームなどの溶接には、ＣＯ２溶接、ＭＡ（）
溶接、ＭＩＧ溶接、ＴＩＧ溶接などのガスシールドアー
ク溶接が用いられておシ、一般にガスシールドアーク溶
接はアーク熱によシ溶接材料と被溶接物の一部を溶解し
て接合を行う方法であるため、被溶接物にも大きな熱が
加えられる。Conventional thin steel plate structures, austenitic stainless steel,
For welding aluminum etc., CO2 welding, MA()
Gas-shielded arc welding such as welding, MIG welding, and TIG welding is used. Generally, gas-shielded arc welding is a method of joining by melting a part of the welding material and the workpiece using arc heat. Therefore, a large amount of heat is also applied to the workpiece.
このため薄鋼板構造物やアルミニュームの溶接では、溶
接時に歪が生じたり、熱影響部の強度低下をまねいたり
しており、またオーステナイト系ステンレス鋼の溶接で
は、熱影響部が鋭敏化し応力腐食割れの原因になったり
している。For this reason, when welding thin steel plate structures or aluminum, distortion occurs during welding and the strength of the heat-affected zone decreases, and when welding austenitic stainless steel, the heat-affected zone becomes sensitive and stress corrosion occurs. It may cause cracks.
このように溶接による被溶接物への入熱が大きいほど不
具合程度も大きくなるため、従来では被溶接物を空気や
水で冷却しながら溶接を行っているが、このような方法
は、溶接作業を著しく阻害するうえにその効果は確実で
はなく、また場合によっては、気孔発生など別の溶接欠
陥を誘発する原因にもなっている。In this way, the greater the heat input into the welded object during welding, the greater the degree of failure. Conventionally, welding is performed while cooling the welded object with air or water, but this method In addition to significantly inhibiting the welding process, its effectiveness is not certain, and in some cases, it can also cause other welding defects such as porosity.
本発明は、このような事情に鑑みて提案されたもので、
溶接作業を何ら阻害することなくガスンールドアーク溶
接における被溶接物への溶接入熱を確実に減少し、溶接
歪量を減少するとともに熱影響部の強度低下及び鋭敏化
を軽減し、かつ気孔発生などを誘発することがない入熱
制御溶接方法を提供することを目的とする。The present invention was proposed in view of these circumstances, and
It reliably reduces the welding heat input to the workpiece in gas-n-old arc welding without interfering with welding work, reduces the amount of welding distortion, reduces the strength loss and sensitization of the heat affected zone, and reduces porosity. The object of the present invention is to provide a heat input control welding method that does not induce heat generation.
そのために本発明は、被溶接物に対向するガスシールド
アーク浴接トーチの周囲に先端が開放された円筒ノズル
を装着し、同円筒ノズル内に設置されたリング状噴出口
から液状二酸化炭素を噴出させながら溶接を行うことを
特徴とする。To this end, the present invention installs a cylindrical nozzle with an open tip around a gas-shielded arc bath welding torch facing the workpiece, and ejects liquid carbon dioxide from a ring-shaped spout installed within the cylindrical nozzle. The feature is that welding is performed while
本発明方法においては、リング状噴出口から噴出した液
状二酸化炭素は断熱膨張によシ冷却され、炭酸ガスにな
るとともに一部分はドライアイスになり、この低温度炭
酸ガスとドライアイスが円筒ノズルに導かれて被溶接物
表面に吹き付けられ、溶接部周辺を強制的に冷却する。In the method of the present invention, liquid carbon dioxide ejected from a ring-shaped spout is cooled by adiabatic expansion, becomes carbon dioxide gas, and partially turns into dry ice, and this low-temperature carbon dioxide gas and dry ice are introduced into the cylindrical nozzle. The liquid is then sprayed onto the surface of the workpiece, forcibly cooling the area around the weld.
〔実施例〕
本発明入熱制御溶接方法の一実施例を第１図斜視図につ
いて説明する。[Embodiment] An embodiment of the heat input controlled welding method of the present invention will be described with reference to the perspective view of FIG.
第１図において、１は被溶接物、２は手動又は自動操作
されて被溶接物１に対向するガスシールドアーク溶接ト
ーチ、３はアーク、４はガスシールドアーク溶接トーチ
２の周囲に装着され先端が開放された円筒ノズル、５は
円筒ノズル４内に設置されたリング状噴出口、６はホー
ス１７は液状二酸化炭素ボンベ、８は導管、９はバルブ
である。In Fig. 1, 1 is a workpiece to be welded, 2 is a gas-shielded arc welding torch that is manually or automatically operated and faces the workpiece 1, 3 is an arc, and 4 is a tip attached around the gas-shielded arc welding torch 2. is an open cylindrical nozzle, 5 is a ring-shaped spout installed in the cylindrical nozzle 4, 6 is a hose 17 that is a liquid carbon dioxide cylinder, 8 is a conduit, and 9 is a valve.
このような装置態様において、ボンベ７内に貯蔵されて
いる液状二酸化炭素は室温では一部気化して圧力を生ず
るため、バルブ９を開くと導管８．ホース６を通じて、
液状二酸化炭素がリング状噴出口５に導びかれその細孔
から噴出する。噴出した液状二酸化炭素は断熱膨張する
ため低温の炭素ガスとドライアイスに変化し、円筒ノズ
ル４に沿って被溶接物１の表面に吹き付けられる。In this embodiment of the device, the liquid carbon dioxide stored in the cylinder 7 is partially vaporized at room temperature, creating pressure, so that when the valve 9 is opened, the conduit 8. Through hose 6,
Liquid carbon dioxide is guided to the ring-shaped spout 5 and spouted from its pores. The ejected liquid carbon dioxide undergoes adiabatic expansion and changes into low-temperature carbon gas and dry ice, which are sprayed onto the surface of the workpiece 1 along the cylindrical nozzle 4.
ガスシールドアーク溶接トーチ２は図示せざる清接電源
、ワイヤ送給装置及びシールドガス供給装置によ゛す、
アーク３を発生させて溶接を行うが、その浴接部の近傍
が低温の炭酸ガスやドライアイスによって冷却され、被
溶接物１への溶接入熱は著しく減少する。The gas shielded arc welding torch 2 relies on a direct power source, a wire feeder, and a shielding gas supply device (not shown).
Although welding is performed by generating an arc 3, the vicinity of the bath welding portion is cooled by low-temperature carbon dioxide gas or dry ice, and the welding heat input to the workpiece 1 is significantly reduced.
かくしてこの方法によれば、被溶接物１の溶接部近傍が
、溶接作業を何ら阻害することなく強制的に冷却され、
結果として被溶接物１に伝わる溶接熱が減少し、溶接歪
量が減少するとともに熱影響部の強度低下、鋭敏化を軽
減することができる。またこの方法の冷却剤は二酸化炭
素であるので、溶接アーク雰囲気に混入したとしても気
孔などの溶接欠陥を発生することはない。Thus, according to this method, the vicinity of the welding part of the workpiece 1 is forcibly cooled without interfering with the welding operation in any way,
As a result, the welding heat transmitted to the workpiece 1 is reduced, the amount of welding distortion is reduced, and the strength reduction and sensitization of the heat affected zone can be reduced. Furthermore, since the coolant used in this method is carbon dioxide, even if it mixes into the welding arc atmosphere, it will not cause welding defects such as pores.
要するに本発明によれば、被溶接物に対向するガスシー
ルドアーク溶接トーチの周囲に先端が開放された円筒ノ
ズルを装着し、同円筒ノズル内て設置されたリング状噴
出口から液状二酸化炭素を噴出させながら溶接を行うこ
々により、溶接作業を何ら阻害することな（′７′ｆス
シールドアーク溶接忙おける被溶接物へつ溶接入熱を確
実に減少し、溶接歪量を減少する吉ともに熱影響部の強
度低下及び鋭敏化を軽減し、かつ気孔発生などを誘発す
ることがなり入熱制御溶接方法を得るから、本発明は産
業上極めて有益なものである。In short, according to the present invention, a cylindrical nozzle with an open tip is attached around a gas-shielded arc welding torch facing the workpiece, and liquid carbon dioxide is ejected from a ring-shaped spout installed within the cylindrical nozzle. By performing welding while welding, the welding work is not hindered in any way ('7'f) It is possible to reliably reduce the welding heat input to the workpiece during shielded arc welding, and also to reduce the amount of welding distortion. The present invention is industrially extremely useful because it provides a heat input controlled welding method that reduces the strength reduction and sensitization of the heat-affected zone and induces the generation of pores.
第１図は本発明入熱制御溶接方法の一実施例における実
施装置を示す斜視図である。
１・・・被溶接物、２・・・ガスシールドアーク溶接ト
ーチ、３・・・アーク、４・・・円筒ノズル、５１１．
リング状噴出口、６・・・ホース、７・・・液状二酸化
炭素ボンベ、８・・・導管、９・・・バルブ。
代理人 弁理士 塚 本 正 文FIG. 1 is a perspective view showing an implementation apparatus in an embodiment of the heat input controlled welding method of the present invention. DESCRIPTION OF SYMBOLS 1... Workpiece to be welded, 2... Gas shielded arc welding torch, 3... Arc, 4... Cylindrical nozzle, 511.
Ring-shaped spout, 6... hose, 7... liquid carbon dioxide cylinder, 8... conduit, 9... valve. Agent: Masafumi Tsukamoto, Patent Attorney
Claims (1)
、同円筒ノズル内に設置されたリング状噴出口から液状
二酸化炭素を噴出させながら溶接を行うことを特徴とす
る入熱制御溶接方法。[Claims] A cylindrical nozzle with an open tip is attached around a gas-shielded arc welding torch facing the workpiece, and liquid carbon dioxide is spouted from a ring-shaped spout installed within the cylindrical nozzle. A heat input control welding method characterized by performing welding while
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20166688A JPH0252173A (en) | 1988-08-12 | 1988-08-12 | Heat input control welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20166688A JPH0252173A (en) | 1988-08-12 | 1988-08-12 | Heat input control welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0252173A true JPH0252173A (en) | 1990-02-21 |
Family
ID=16444883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20166688A Pending JPH0252173A (en) | 1988-08-12 | 1988-08-12 | Heat input control welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0252173A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009018346A (en) * | 2007-07-10 | 2009-01-29 | Linde Ag | Machine and method for welding one workpiece to another |
| EP3178595A1 (en) * | 2015-12-10 | 2017-06-14 | Linde Aktiengesellschaft | Method for welding and/or coating by means of an arc |
| EP4186627A1 (en) * | 2021-11-25 | 2023-05-31 | Messer SE & Co. KGaA | Method for reducing warpage in metal welding and cutting |
-
1988
- 1988-08-12 JP JP20166688A patent/JPH0252173A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009018346A (en) * | 2007-07-10 | 2009-01-29 | Linde Ag | Machine and method for welding one workpiece to another |
| EP3178595A1 (en) * | 2015-12-10 | 2017-06-14 | Linde Aktiengesellschaft | Method for welding and/or coating by means of an arc |
| EP4186627A1 (en) * | 2021-11-25 | 2023-05-31 | Messer SE & Co. KGaA | Method for reducing warpage in metal welding and cutting |
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