JPS59137176A - Build-up welding method of thin wall metallic pipe - Google Patents
Build-up welding method of thin wall metallic pipeInfo
- Publication number
- JPS59137176A JPS59137176A JP1171583A JP1171583A JPS59137176A JP S59137176 A JPS59137176 A JP S59137176A JP 1171583 A JP1171583 A JP 1171583A JP 1171583 A JP1171583 A JP 1171583A JP S59137176 A JPS59137176 A JP S59137176A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- metal tube
- coolant
- welding
- jigs
- 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.)
- Granted
Links
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
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
- B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は薄肉金属管の外周表面上の肉盛溶接方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of overlay welding on the outer peripheral surface of a thin-walled metal tube.
従来、各種の田−ル、ローラ等の肉盛溶接には、良好な
溶接特性と高い溶接速度を得る為にサブマージアーク溶
接法が多用されており、被溶接物が中実材あるいは厚内
材の場合には大きな効果を奏している。しかし乍らサブ
マージアーク溶接法は大電流、高入熱の為に、被溶接物
が比較的薄肉、例えば厚さ２０ｆｆｌＩ１１以下の円筒
材の様な場合には問題が多い、即ちこの様な薄肉円筒材
の両端を治具で保持し、長手方向中心軸を軸として回転
せしめつつ大電流、高入熱の溶接条件で該円筒材の一端
から順次他端へ向けて溶接を行なって行くが、該円筒材
の熱容量が小さい為に溶接が進行するに伴って該円筒材
が過熱されその外周表面上に形成された溶融プールの凝
固が遅れ、円筒材の回転につれて溶融プール内の溶融金
属は下方に流れ落ちようとする傾向を示し、この結果溶
接ビードの形状に凹凸が生じ薄肉一層盛の様な高精度の
肉盛は不可能となるのである。従って例えば有効肉盛厚
が１．５＋ｎｍの溶接肉盛が要求される場合でも、前記
の理由で一層盛が不可能である為、止む得ず多層盛によ
る厚肉肉盛を行ない、その後機械加工により所望の肉盛
層に仕上げるという工程、材料ともに無駄な方法を採ら
ざるを得ない状態であった。更にもう一つの問題として
、被溶接円筒材が溶接入熱により過熱され溶接終了時あ
るいはその後の冷却時に於いて変形を生じ、その矯正に
多大の労力と時間を要し、甚だしき場合には使用不能と
なる乙とさえあった。Conventionally, submerged arc welding has been widely used for overlay welding of various fields, rollers, etc. in order to obtain good welding characteristics and high welding speeds, and the workpiece to be welded is solid material or thick material. In this case, it has a great effect. However, since the submerged arc welding method uses a large current and high heat input, there are many problems when the workpiece to be welded is a relatively thin wall, such as a cylindrical material with a thickness of 20 fflI11 or less. Both ends of the cylindrical material are held in a jig, and welding is performed from one end of the cylindrical material to the other in sequence under high current and high heat input welding conditions while rotating the material around its longitudinal center axis. Since the heat capacity of the cylindrical material is small, as welding progresses, the cylindrical material becomes overheated, and the solidification of the molten pool formed on its outer peripheral surface is delayed, and as the cylindrical material rotates, the molten metal in the molten pool flows downward. It shows a tendency to run down, and as a result, the shape of the weld bead becomes uneven, making it impossible to perform high-precision overlay such as thin single-layer overlay. Therefore, for example, even if a weld build-up with an effective build-up thickness of 1.5+nm is required, it is impossible to build up a layer of material due to the above-mentioned reasons, so thick build-up using multi-layer build-up is unavoidable, and then machining is performed. Therefore, it was necessary to adopt a method that was wasteful in terms of both the process and the materials used to finish the desired build-up layer. Another problem is that the cylindrical material to be welded becomes overheated by the welding heat input and becomes deformed at the end of welding or during subsequent cooling, requiring a great deal of effort and time to correct the deformation, and in extreme cases rendering the product unusable. There was even a person named Naru Otsu.
本発明は上述の諸問題を解消する肉盛溶接方法を提供せ
んとするものであり、その要旨は薄肉金属管の両端を治
具で保持し、該金属管をその長手方向中心軸を回転−軸
として回転せしめつつ咳金属管の外周表面に肉盛溶接を
施すに際し、前記金属管の内部空間内に冷却液注入管を
挿入し同冷却液注入管の所要部所に開孔した冷却液流出
孔から金属管内周面へ向けて冷却液を流出させると共に
、前記両端の治具の中央なくとも一方の治具には金属管
の内周面より所定距離中心軸寄りの部所に開口部を設け
、流出させた冷却液が金属管内に所定深さをもって滞留
し該滞留液面を越える量の冷却液は前記治具の開口部か
ら金ａ’ｗ外部へ賞出する如くなしたことを特徴とする
薄肉金属管の肉盛溶接方法である。The present invention aims to provide an overlay welding method that solves the above-mentioned problems.The gist of the present invention is to hold both ends of a thin-walled metal tube with a jig, and rotate the metal tube about its longitudinal central axis. When performing overlay welding on the outer circumferential surface of a metal pipe while rotating it as a shaft, a coolant injection pipe is inserted into the internal space of the metal pipe, and the coolant flows out by opening holes in the required parts of the coolant injection pipe. The coolant flows out from the hole toward the inner circumferential surface of the metal tube, and at least one of the jigs at both ends has an opening at a predetermined distance closer to the central axis than the inner circumferential surface of the metal tube. It is characterized in that the coolant that is provided and flowed out stays at a predetermined depth within the metal tube, and the amount of coolant that exceeds the level of the accumulated liquid is discharged from the opening of the jig to the outside of the metal pipe. This is a method for overlay welding of thin-walled metal tubes.
以下本発明方法を図面を参酌しながら詳述する。The method of the present invention will be explained in detail below with reference to the drawings.
第１図及び第２図は本発明方法の一実施例を示すもので
あり、被溶接金属管（１）の両端を治具（２）。1 and 2 show an embodiment of the method of the present invention, in which both ends of a metal pipe (1) to be welded are connected to a jig (2).
（３）及び（４）により保持し、回転駆動装置（５）及
び従動輪装置（６）により金属管（１）をその長手方向
中心軸を回転軸として回転自在に配設する。治具（４）
には開口部（７）を設け、さらに中心に孔を穿って一端
が閉じられた冷却液注入管（８）を挿通して締付ナツト
（９）により治具（４）に固定し、併せて治具（３）及
び（４）が金属管（１）に固定されるようにする。冷却
液注入管（８）の閉端部は治具（２）の中心部において
保持され、かつ該閉端部に近い先端部に所定の寸法及び
数量の冷却液流出孔（１０）が穿たれている。別に設け
た図示しない冷却液供給装置により冷却液を冷却液注入
管（８）に注入すれば、冷却液は流出孔（１０）より金
属管（１）内、こ流出してその下面？こ一様の探合に滞
留し、該滞留の液面を越える量の冷却液は治具（４）の
開口部（７）より金属管（１）の外部へ溢流し、下方に
設けられた冷却液注入管（１１）内に流下する。この流
下液はそのまま流量してもよいが、別に設けた冷却循環
装置により循環使用することも一方法である。冷却液の
流量は別に設けた図示しない調節弁によって設定される
が、開口部（７）の数量または開口面積を予め選ぶ乙と
によって設定してもよい。なお、冷却液の漏出を防止す
るために、金属管（１）１と治具（２）および（３）と
の接触部、および治具（３）と治具（４） との接触部
には、それぞれ漏出防止バッキング（１２］を介在せし
める乙とが必要である。(3) and (4), and the metal tube (1) is arranged so as to be rotatable about its longitudinal center axis as a rotation axis by a rotary drive device (5) and a driven wheel device (6). Jig (4)
An opening (7) is provided in the hole, and a coolant injection pipe (8) with one end closed is inserted through a hole in the center and fixed to the jig (4) with a tightening nut (9). so that the jigs (3) and (4) are fixed to the metal tube (1). The closed end of the coolant injection pipe (8) is held in the center of the jig (2), and a coolant outflow hole (10) of a predetermined size and quantity is bored at the tip near the closed end. ing. When the coolant is injected into the coolant injection pipe (8) by a separately provided coolant supply device (not shown), the coolant flows out from the outflow hole (10) into the metal pipe (1) and flows out from the bottom surface of the metal pipe (1). The cooling liquid accumulated in this uniform probe in an amount exceeding the liquid level of the accumulated liquid overflows from the opening (7) of the jig (4) to the outside of the metal tube (1), The coolant flows down into the coolant injection pipe (11). This flowing liquid may be allowed to flow as it is, but one method is to circulate it using a separately provided cooling circulation device. The flow rate of the cooling liquid is set by a separately provided control valve (not shown), but it may also be set by selecting the number or opening area of the openings (7) in advance. In addition, in order to prevent leakage of the coolant, the contact area between the metal pipe (1) 1 and the jigs (2) and (3), and the contact area between the jig (3) and the jig (4) are require interposition of a leak-proof backing (12), respectively.
第１図及び第２図中（１３）は滞留冷却液、（１４）は
カップラーを示す。In FIGS. 1 and 2, (13) indicates the retained coolant, and (14) indicates the coupler.
なお上述の説明では冷却液を冷却液注入管（８）の先端
部の数カ所から流出させ、金属管の一方端から賞出さ・
せているが、両端の治具ともに開口部（７）を設けてお
き金属管の両方端から賞出させる事もある。又被溶接材
たる金属管に対する入熱は溶接部が最も大であるので常
に溶接部の裏面に新しい即ち冷たい冷却液が当接すべく
、溶接装置と共に冷却注入管（８）をも同時に移動させ
る様にして冷却効果を高める事もある。その−例として
は例えば第３図に示す様に、レール（１５）上を走行す
る溶接装置載置台車（１６）と冷却液注入管（８） と
を連結杆（１７）等所要手段で連結し、かつ冷却液注入
管（８−）は金属管（１）の内部空間に横方向に張設し
たケーブル（１８）にケーブル滑車（１９）を介して吊
下せしめておく方法がある。In the above explanation, the coolant is flowed out from several places at the tip of the coolant injection pipe (8), and the coolant is discharged from one end of the metal pipe.
However, openings (7) are provided in both ends of the jig so that the prize can be drawn out from both ends of the metal tube. In addition, since the heat input to the metal pipe that is the material to be welded is the largest at the welding part, the cooling injection pipe (8) is moved at the same time as the welding equipment so that new, ie, cold, coolant always comes into contact with the back side of the welding part. In some cases, the cooling effect can be enhanced. For example, as shown in Fig. 3, a welding equipment mounting cart (16) running on a rail (15) and a coolant injection pipe (8) are connected by a necessary means such as a connecting rod (17). However, there is a method in which the coolant injection pipe (8-) is suspended from a cable (18) stretched laterally in the interior space of the metal pipe (1) via a cable pulley (19).
以上述べて来た如く本発明方法によれば、金属管を回転
させつつ、該金属管の外周表面の一方の端から他方の端
へ向は肉盛溶接を施して行くと、溶接時の大電流、高入
熱により金属管に対して相当量の入熱があるが、金属管
の内側には常に一定の深さで冷却液が滞留しておりかつ
該滞留深さを越えた分は金属管外へ賞出しているので、
この冷却液により常時冷却され熱が金属管の外へ持ち去
られる為金属管は過熱される事なく、その外周表面上に
形成される溶融プールの凝固は速やかに行なわれるので
溶接ビードの形状も良好となり従って薄肉一層盛の様な
高精度の肉盛が可能となる。As described above, according to the method of the present invention, overlay welding is performed from one end of the outer circumferential surface of the metal tube to the other end while rotating the metal tube. A considerable amount of heat is input into the metal tube due to the current and high heat input, but the coolant always remains at a certain depth inside the metal tube, and the amount beyond this retention depth is lost to the metal. Since we are awarding prizes outside our jurisdiction,
This coolant constantly cools the metal tube and carries the heat away from the metal tube, so the metal tube does not overheat, and the molten pool that forms on its outer surface quickly solidifies, resulting in a good weld bead shape. Therefore, high-precision overlay such as thin single-layer overlay is possible.
更に溶接終了時あるいはその後の冷却時の変形も少な（
なる。そしてこれらの利点は冷却液注入管を溶接装置と
応動させ入熱部近傍に常に冷却液を流出させる方式を採
る事により一層効果的となる。Furthermore, there is less deformation at the end of welding or during subsequent cooling (
Become. These advantages can be made even more effective by using a system in which the coolant injection pipe is connected to the welding device so that the coolant always flows out near the heat input section.
また本発明方法によれば金属管を冷却する過程で加熱さ
れた冷却水が金属管内を流れ一端あるいは両端から浴出
るまでの間に金属管の未溶接部分を数十〜百℃に予熱す
るので別途予熱を行なう事なく良好なｍ−状態を得る事
が出来るという効果もあるものである。Furthermore, according to the method of the present invention, the unwelded portion of the metal tube is preheated to several tens to hundreds of degrees Celsius while the heated cooling water flows through the metal tube and comes out from one or both ends. Another advantage is that a good m-state can be obtained without separate preheating.
次に本発明方法により実際に行なった溶接方法につき述
べる。即ち、外径２７７＋ｎｏ＋ 、肉厚２；？−２５
ｍｍ。Next, a welding method actually carried out using the method of the present invention will be described. That is, outer diameter 277+no+, wall thickness 2;? -25
mm.
胴長２３００＋ｎｒ＋の鉄鋼製パイプ７０本に対し、第
１図に示す様な方法で、冷却液注入管としてサイズ１５
ａ（実外径２１．７＋ｎｉ）のものを先端を盲にし該先
端よ’１１１００ｍ＋ｎ間隔で径５１１１１の冷却液流
出孔を４個貫設し、冷却液として２０℃の水を用い、か
つ２５ｍｍ幅（７）帯状溶材を５０ｍ１幅に変えて溶接
をした。その結果従来の条件に比べて高入熱であったに
も拘らず必要有効肉盛厚１．５ｍｍに対し２．５ｍｍの
肉盛厚（切削代を含む）で仕上げることが出来、しかも
鉄鋼製パイプの熱的変形も切削代の範囲内であす、７０
本全数について問題はなかった。また溶接所要時間は従
来の条件に比べ約５０％減少した。For 70 steel pipes with a body length of 2300+nr+, use the method shown in Figure 1 to inject size 15 as coolant injection pipes.
A (actual outer diameter 21.7 + ni) was made with a blind tip, and four coolant outlet holes with a diameter of 51111 were penetrated from the tip at intervals of 11100 m + n, using water at 20 ° C as the coolant, and with a width of 25 mm. (7) Welding was performed by changing the band-shaped weld metal to a width of 50 m1. As a result, despite the higher heat input compared to conventional conditions, it was possible to finish with a build-up thickness of 2.5 mm (including cutting allowance) compared to the required effective build-up thickness of 1.5 mm, and it was made of steel. Thermal deformation of the pipe is also within the cutting allowance, 70
There were no problems with all the books. Additionally, the time required for welding was reduced by approximately 50% compared to conventional conditions.
以上の如く本発明によれば、薄肉金属管の肉盛溶接が高
精度かつ高能率で行なえるものである。As described above, according to the present invention, overlay welding of thin-walled metal tubes can be performed with high precision and high efficiency.
第１図は本発明方法の一実施例を示す説明図、第２図は
第１図Ａ−Ａ線に於ける断面図、第３図は本発明方法の
他の実施例を示す説明図。
図中、 （１）：金属管
（２） 、 （３） 、 （４） ＋治具（７）：開口
部
（８）：冷却液注入管
（１０） ｊ冷却液流出孔
特許出願人 株式会社富士工業所
代理人有吉教晴FIG. 1 is an explanatory diagram showing one embodiment of the method of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is an explanatory diagram showing another embodiment of the method of the present invention. In the figure, (1): Metal pipes (2), (3), (4) + Jig (7): Opening (8): Coolant injection pipe (10) j Coolant outflow hole Patent applicant Co., Ltd. Fuji Industries agent Noriharu Ariyoshi
Claims (1)
長手方向中心軸を回転軸として回転せしめつつ該金属管
の外周表−面に肉盛溶接を施すに際し、前記金属管の内
部空間内に冷却液注入管を挿入し同冷却液注入管の所要
部所に開孔しｔコ冷却液流出孔から金属管内周面へ向け
て冷却液を流出させると共に、前記両端の治具の牛歩な
くとも一方の治具には金属管の内周面より所定距離中心
軸寄りの部所に開口部を設け、流出させた冷却液が金属
管内に所定深さをもって滞留し該滞留液面を越える量の
冷却液は前記治具の開口部から金属管外部へ湿田する如
くなしたことを特徴とする薄肉金属管の肉盛溶接方法。1. When holding a thin-walled metal tube with jigs at both ends and performing overlay welding on the outer peripheral surface of the metal tube while rotating the metal tube about its longitudinal center axis as the rotation axis, A coolant injection pipe is inserted into the internal space, holes are opened at the required locations of the coolant injection pipe, and the coolant flows out from the coolant outflow hole toward the inner circumferential surface of the metal tube, and the jigs at both ends are inserted. At least one of the jigs is provided with an opening at a predetermined distance from the inner peripheral surface of the metal tube toward the center axis, so that the coolant that flows out stays at a predetermined depth inside the metal tube, and the level of the retained liquid is increased. A method for overlay welding of thin-walled metal tubes, characterized in that an amount of cooling liquid exceeding 100 mL is wetted from the opening of the jig to the outside of the metal tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1171583A JPS5946708B2 (en) | 1983-01-26 | 1983-01-26 | Overlay welding method for thin-walled metal tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1171583A JPS5946708B2 (en) | 1983-01-26 | 1983-01-26 | Overlay welding method for thin-walled metal tubes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59137176A true JPS59137176A (en) | 1984-08-07 |
| JPS5946708B2 JPS5946708B2 (en) | 1984-11-14 |
Family
ID=11785732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1171583A Expired JPS5946708B2 (en) | 1983-01-26 | 1983-01-26 | Overlay welding method for thin-walled metal tubes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5946708B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6250872U (en) * | 1985-09-17 | 1987-03-30 | ||
| EP0271696A2 (en) * | 1986-12-16 | 1988-06-22 | MAN Gutehoffnungshütte Aktiengesellschaft | Process and device for the manufacture of thin-walled hollow bodies made of concentric metal layers |
| CN104162751A (en) * | 2014-07-17 | 2014-11-26 | 湖南能创环保科技有限公司 | Automatic welding and cooling device and welding method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59151810U (en) * | 1983-03-31 | 1984-10-11 | 日本発条株式会社 | hollow stabilizer |
-
1983
- 1983-01-26 JP JP1171583A patent/JPS5946708B2/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6250872U (en) * | 1985-09-17 | 1987-03-30 | ||
| JPS647022Y2 (en) * | 1985-09-17 | 1989-02-23 | ||
| EP0271696A2 (en) * | 1986-12-16 | 1988-06-22 | MAN Gutehoffnungshütte Aktiengesellschaft | Process and device for the manufacture of thin-walled hollow bodies made of concentric metal layers |
| DE3700377A1 (en) * | 1986-12-16 | 1988-07-07 | Gutehoffnungshuette Man | METHOD AND DEVICE FOR PRODUCING THIN-WALLED HOLLOW BODIES FROM CONCENTRIC METAL LAYERS |
| CN104162751A (en) * | 2014-07-17 | 2014-11-26 | 湖南能创环保科技有限公司 | Automatic welding and cooling device and welding method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5946708B2 (en) | 1984-11-14 |
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