JPS61143591A - Method for preventing generation of strain in welded structure during plating - Google Patents
Method for preventing generation of strain in welded structure during platingInfo
- Publication number
- JPS61143591A JPS61143591A JP26269984A JP26269984A JPS61143591A JP S61143591 A JPS61143591 A JP S61143591A JP 26269984 A JP26269984 A JP 26269984A JP 26269984 A JP26269984 A JP 26269984A JP S61143591 A JPS61143591 A JP S61143591A
- Authority
- JP
- Japan
- Prior art keywords
- plating
- welded structure
- during plating
- deformation
- strain
- 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
Landscapes
- Electroplating Methods And Accessories (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は橋梁等の鉄骨溶接構造物を防錆のため鍍金する
際に発生する歪を防止する方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for preventing distortion that occurs when a welded steel structure such as a bridge is plated for rust prevention.
従来の技術
鋼橋の防錆方法としては防錆２ンキ塗布、耐候性鋼の使
用及び鍍金法がある。Conventional rust prevention methods for steel bridges include antirust two-ink coating, use of weathering steel, and plating methods.
発明が解決しようとする問題点
溶接橋桁を金属鍍金により防錆処理した場合、溶接残留
応力が鍍金温度における応力バランスで再編成されると
同時に、応力変動分に相当する変形を生ずる。Problems to be Solved by the Invention When a welded bridge girder is subjected to anti-rust treatment by metal plating, welding residual stress is reorganized by the stress balance at the plating temperature, and at the same time, deformation corresponding to the stress fluctuation occurs.
この変形は鍍金直前における残留応力の分布に一次的に
関係する。また被鍍金材である橋桁の鍍金バスへの投入
時に生ずる部材の温度勾配にも二次的に関係するが、前
者の影響度の方が主体をなしている。This deformation is primarily related to the distribution of residual stress immediately before plating. It is also secondarily related to the temperature gradient of the bridge girder, which is the material to be plated, that occurs when it is put into the plating bath, but the former is the main influence.
よって、現在まで、上記変形を軽減させる方法として、
溶接方法、順序ま皮は溶接後の歪取り等により、部材の
残留応力及びその分布が鍍金後の変形に及ぼす影響につ
いて実験がなされ、報告されているが、解決をみていな
い。Therefore, until now, as a method to reduce the above deformation,
Experiments have been conducted and reported on the effects of residual stress and its distribution on the deformation after plating through welding methods and ordering, such as removing strain after welding, but no solutions have been found.
これは、部材の溶接継手が完全にシンメトリカルになっ
ていないこと、単−継手内においても溶接方向に起因、
する残留応力の不均一分布等により、鍍金時の応力再編
成による変形防止が完全になくなるような残留応力均一
性及び部材内における対称性を溶接構造物に期待するこ
とは現実として不可能のためであると考えられる。This is due to the fact that the welded joints of the members are not completely symmetrical, and the welding direction even within a single joint.
Due to uneven distribution of residual stress, etc., it is actually impossible to expect welded structures to have residual stress uniformity and symmetry within the member that completely eliminates deformation prevention due to stress reorganization during plating. It is thought that.
問題点を解決する九めの手段
本発明は、鍍金に先立って溶接構造物に繰返し歪を与え
、部材内の残留応力そのものを軽減させることによって
、鍍金による高温変形を防止するも、のである。Ninth Means for Solving the Problems The present invention prevents high-temperature deformation caused by plating by applying repeated strain to the welded structure prior to plating and reducing the residual stress itself within the member.
作用
溶接構造物に弾性限界近くまでの数回程度の歪を与える
ことにより、鍍金時の変形に悪影響を与える残留応力を
除去する。By applying strain to the welded structure several times to near its elastic limit, residual stress that adversely affects deformation during plating is removed.
実施例
第１図に示すように、鍍金されるべき溶接構造物１にジ
ヤツキ２等で弾性限界近くまで数回程度の繰返し荷重を
加える。このようにして溶接時の残留応力が軽減かつ均
一化される。EXAMPLE As shown in FIG. 1, a welded structure 1 to be plated is repeatedly loaded several times with a jack 2 or the like until it approaches its elastic limit. In this way, residual stress during welding is reduced and made uniform.
繰返し負荷後の構造物形状は正規寸法が確保されるよう
荷重コントロールされる。After repeated loading, the structure is subjected to load control to maintain regular dimensions.
発明の効果
応力除去焼鈍法で必要とするような大形焼鈍炉を設置す
る必要がない。Effects of the Invention There is no need to install a large annealing furnace as required in the stress relief annealing method.
溶接残留応力が軽減かつ均一化されるので鍍金時に発生
する変形が防止される。Since welding residual stress is reduced and made uniform, deformation that occurs during plating is prevented.
第１図は本発明溶接構造物の鍍金時歪発生防止法の実施
例を示す概略図である。
１・・・溶接構造物 ２・・・ジヤツキ復代理人
弁理士 岡 本 重 文外３名FIG. 1 is a schematic view showing an embodiment of the method for preventing distortion during plating of a welded structure according to the present invention. 1...Welded structure 2...Jayatsuki sub-agent
Patent attorney: Shige Okamoto (3 persons)
Claims (1)
鍍金時に発生する歪変形と同様な変形荷重を加え、残留
応力を軽減及び均一化したのち鍍金することによつて鍍
金時に発生する変形を防止することを特徴とする溶接構
造物の鍍金時歪発生防止法。When plating a welded structure, the welded structure is coated with
Strain generation during plating of a welded structure characterized by applying a deformation load similar to the strain deformation that occurs during plating to reduce and equalize residual stress and then plating to prevent deformation that occurs during plating. Prevention method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26269984A JPS61143591A (en) | 1984-12-14 | 1984-12-14 | Method for preventing generation of strain in welded structure during plating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26269984A JPS61143591A (en) | 1984-12-14 | 1984-12-14 | Method for preventing generation of strain in welded structure during plating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61143591A true JPS61143591A (en) | 1986-07-01 |
Family
ID=17379364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26269984A Pending JPS61143591A (en) | 1984-12-14 | 1984-12-14 | Method for preventing generation of strain in welded structure during plating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61143591A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05255735A (en) * | 1992-03-11 | 1993-10-05 | Nippon Steel Corp | Improvement of fatigue strength of weld zone of rail |
| WO2002097153A1 (en) * | 2001-05-25 | 2002-12-05 | E Tech Incorporated | Method of hot-dip galvanizing i-shaped structural member |
| KR20030088988A (en) * | 2002-05-15 | 2003-11-21 | 이형훈 | method for removing residual deformation of steel to make the steel behave elastically |
-
1984
- 1984-12-14 JP JP26269984A patent/JPS61143591A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05255735A (en) * | 1992-03-11 | 1993-10-05 | Nippon Steel Corp | Improvement of fatigue strength of weld zone of rail |
| WO2002097153A1 (en) * | 2001-05-25 | 2002-12-05 | E Tech Incorporated | Method of hot-dip galvanizing i-shaped structural member |
| KR20030088988A (en) * | 2002-05-15 | 2003-11-21 | 이형훈 | method for removing residual deformation of steel to make the steel behave elastically |
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