JPS62114767A - One side hole-filling welding method for steel plate - Google Patents

Abstract

PURPOSE:To shorten the number of stages extending to a surface finish of a weld zone by placing a backing plate against one face of a steel plate through a spacer providing a gap between one face of the steel plate and the backing plate, and padding a weld metal into a through-hole from the other face of the steel plate. CONSTITUTION:A backing steel plate 9 for closing up a through-hole 8 is tacked to the lower face 7a of a steel plate 7 through a spacer 10, a gap is made between the steel plate 9 and the lower face 7a of the steel plate 7, and the backing steel plate 9 is placed against the lower face 7a of the steel plate 7. By a semi-automatic welding, etc., a weld metal is padded from the upper face 7b side into the through-hole 8, and a hole-filling welding is executed by filling the through-hole 8 with a weld metal. Accordingly, a weld zone 11 which has brought to the through-hole 8 to the hole-filling welding becomes a good part which does not generate a crack, etc. at least to the lower end of the through-hole 8.

Description

【発明の詳細な説明】 〔発明の技術分野〕 この発明は、鋼板の片面孔埋め溶接方法に関」るもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for welding holes on one side of a steel plate.

〔従来技術とその問題点〕[Prior art and its problems]

鋼板に穿設された貫通孔の片面孔埋め溶接は、従来、次
のように行なわれていたため、溶接部の面仕上げまでの
工程数が多く、時間がかかるなどの問題があった。Conventionally, single-sided hole filling welding of a through hole drilled in a steel plate has been carried out as follows, which has had the problem of requiring a large number of steps to finish the surface of the welded area and taking time.

（１）　　第２図に示すように、鋼板１に穿設された貫
通孔２を塞ぐ裏当て銅板３を、治具によって固定するこ
とによって鋼板１の下面１ａに当て、そして、半自動溶
接によって貫通孔２内に鋼板ｌの上面１ｂ側から溶接金
属を盛り、貫通孔２を溶接金属で埋めて、貫通孔２を孔
埋め溶接する。(1) As shown in Fig. 2, the backing copper plate 3 that closes the through hole 2 drilled in the steel plate 1 is fixed with a jig and applied to the lower surface 1a of the steel plate 1, and then penetrated by semi-automatic welding. Weld metal is filled in the hole 2 from the upper surface 1b side of the steel plate l, the through hole 2 is filled with the weld metal, and the through hole 2 is filled and welded.

（２）第３図に示すように、鋼板１に穿設された貫通孔
２を塞ぐ裏当て鋼板４を、前記鋼板１の下面１ａに仮付
けすることによって下面１ａに当て、そして、上記（１
）の方法と同様に、貫通孔２内に溶接金属を盛って、貫
通孔２を孔埋め溶接する。(2) As shown in FIG. 3, a backing steel plate 4 that closes the through hole 2 drilled in the steel plate 1 is temporarily attached to the lower surface 1a of the steel plate 1, and the above ( 1
), weld metal is placed in the through hole 2 and the through hole 2 is filled and welded.

上記（１）の方法では、裏当て銅板３？ＪＪ１１板１の
下面１ａに密着して当てるので、貫通孔２下端の隅部に
溶接金属が良好に溶は込まず、このため、貫通孔２を孔
埋め溶接してなる溶接部５下部５ｂの隅部（ルート部）
　５ａに、融合不良や割れを発生する。In method (1) above, backing copper plate 3? Since the weld metal is closely applied to the lower surface 1a of the JJ11 plate 1, the weld metal does not melt well into the lower corner of the through hole 2. Therefore, the lower part 5b of the welded part 5 formed by filling the through hole 2 with welding. Corner (root)
5a, poor fusion and cracks occur.

また、裏当て銅板３から銅が溶接金属内に混入して、溶
接部５の下部５ｂに割れを発生することが多い。このた
め、アークエアガウジングにより溶接部５の隅部５ａを
含めた下部５ａを、厚さ約４　ｍＪＡ程度除去したのち
、手動溶接によって鋼板１の下面１ａ側から溶接部５を
手直しする必要があった。手直しの終った溶接部５は、
その後、鋼板１の上面上すおよび下面１ａ側からグライ
ンダにより、面仕上げがなされる。Further, copper from the backing copper plate 3 often gets mixed into the weld metal, causing cracks in the lower part 5b of the welded part 5. Therefore, it is necessary to remove the lower part 5a including the corner 5a of the welded part 5 to a thickness of approximately 4 mJA by arc air gouging, and then rework the welded part 5 from the lower surface 1a side of the steel plate 1 by manual welding. Ta. The welded part 5 that has been repaired is
Thereafter, surface finishing is performed using a grinder from the upper and lower surfaces 1a of the steel plate 1.

上記（２）の方法では、裏当て鋼板４を使用するので、
裏当て鋼板３のときのような、銅の混入による溶接部５
の下部５ｂでの割れはなくなるが、裏当て鋼板３のとき
と同様に、鋼板１の下面１ａに密着して当てるので、溶
接部５の隅部５ａに融合不良や割れを発生する。そのた
め、この方法においても、アークエアガウジングにより
溶接部５の隅部５ａを含めた下部５ｂを、厚さ約４Ｕ程
度除去したのち、手動溶接によって鋼板１の下面１ａ側
から溶接部こを手直しする必要があった。手直しの終っ
た溶接部５は、（１）の方法と同様に、面仕上げがなさ
れる。In method (2) above, the backing steel plate 4 is used, so
Welded part 5 due to copper contamination, as in the case of backing steel plate 3
Although the cracks at the lower part 5b of the welded portion 5 are eliminated, as in the case of the backing steel plate 3, since the lower surface 1a of the steel plate 1 is closely contacted, poor fusion and cracks occur at the corner 5a of the welded portion 5. Therefore, in this method as well, after removing the lower part 5b including the corner 5a of the welded part 5 to a thickness of approximately 4U by arc air gouging, the welded part is reworked from the lower surface 1a side of the steel plate 1 by manual welding. There was a need. The welded portion 5 that has been reworked is surface-finished in the same manner as in method (1).

さらに、この方法では、裏当て鋼板４を銅板ｌの下面１
ａに密着して仮付けするので、裏当て鋼板９を外すため
に、仮付けど一ドロ全アークエアガウジングにより除去
すると、鋼板ｌの下面１ａも多少除去される。このため
、鋼板〕の下面１ａの除去された部分を手動溶接によっ
て手直しする必要もあった。Furthermore, in this method, the backing steel plate 4 is attached to the lower surface 1 of the copper plate l.
Since the backing steel plate 9 is temporarily attached in close contact with the backing steel plate 9, when the entire temporary attachment is removed by arc air gouging, the lower surface 1a of the steel plate 1 is also removed to some extent. For this reason, it was also necessary to repair the removed portion of the lower surface 1a of the steel plate by manual welding.

以上のように、従来の片面孔埋め溶接方法では、荊址げ
までの工程数が多く、時間がかかるなど・−・問題があ
る。As described above, the conventional single-sided hole-filling welding method has problems such as a large number of steps up to welding and a long time.

〔発明の目的〕[Purpose of the invention]

この発明は、上述の現状に鑑み、溶接部の面仕上げまで
の工程数を短縮することができ、かつ溶接部の品質を劣
化させることがない、鋼板の井１面孔埋め溶接方法を提
供することを目的とするζ、のである。In view of the above-mentioned current situation, it is an object of the present invention to provide a welding method for filling holes in one side of a steel plate, which can shorten the number of steps required to finish the surface of a welded part and does not deteriorate the quality of the welded part. The purpose is ζ.

〔発明の概要〕[Summary of the invention]

この発明は、鋼板に穿設された貫通孔を塞ぐ裏当て褥板
を、前記鋼板の１方の面に当てて、前記鋼板の他方の面
側から前記貫通孔内に溶接金属を盛ることにより、前記
貫通孔を前記溶接金属で埋める、鋼板の片面孔埋め溶接
方法において、前記鋼板の前記１方の面と前記裏当て板
との間に隙間を設けるだめのスペーサを介して、前記裏
当て板を前記鋼板の前記１方の面に当て、そして、前記
鋼板の前記他方の面側から前記貫通孔内に前記溶接金属
を盛ることに特徴を有するものである。This invention involves applying a backing plate that closes a through hole drilled in a steel plate to one side of the steel plate, and filling the through hole with weld metal from the other side of the steel plate. , in the one-side hole filling welding method of a steel plate, in which the through hole is filled with the weld metal, the backing plate is welded through a spacer for providing a gap between the one side of the steel plate and the backing plate. The present invention is characterized in that a plate is applied to the one surface of the steel plate, and the weld metal is poured into the through hole from the other surface of the steel plate.

〔発明の構成〕[Structure of the invention]

以下、この発明の鋼板の片面孔埋め溶接方法を図面に基
づき詳述する。Hereinafter, the method for welding holes on one side of a steel plate according to the present invention will be described in detail based on the drawings.

第１図は、この発明の溶接方法の１実施態様を示す説明
図である。第１図において、７は貫通孔８が穿設された
鋼板、９は裏当て鋼板、ｌＯはスペーサである。この発
明では、貫通孔８を塞ぐ裏当て鋼板９を、スペーサ１０
を介して鋼板７の下面７ａに仮付けすることによって、
鋼板７の下面７ａとの間に隙間をあけて、裏当て鋼板９
と鋼板７（下面７ａに当てる。そして、半自動溶接等に
よシＹ・通孔８内に鋼板７の上面７ｂ側から溶接金属を
盛り、貫通孔８を溶接金属で埋めて、貫通孔８ｆ：孔埋
め溶接するものである。FIG. 1 is an explanatory diagram showing one embodiment of the welding method of the present invention. In FIG. 1, 7 is a steel plate with a through hole 8 formed therein, 9 is a backing steel plate, and IO is a spacer. In this invention, the backing steel plate 9 that closes the through hole 8 is replaced by the spacer 10.
By temporarily attaching it to the lower surface 7a of the steel plate 7 via
A backing steel plate 9 is provided with a gap between it and the lower surface 7a of the steel plate 7.
and the steel plate 7 (lower surface 7a).Then, by semi-automatic welding etc., fill the weld metal into the Y/through hole 8 from the upper surface 7b side of the steel plate 7, fill the through hole 8 with weld metal, and then fill the through hole 8f with the weld metal. The hole is filled and welded.

スペーサ１ｏとしては、例えば１〜２止ψのワイヤから
なるリングが掲げられるが、鋼板７の板厚など溶接の条
件に応じて、適宜の隙間を鋼板７の下面γａと裏当て鋼
板９との間に設けられるものであればよい。As the spacer 1o, for example, a ring made of wire with a diameter of 1 to 2 ψ is used, but depending on the welding conditions such as the thickness of the steel plate 7, an appropriate gap is created between the lower surface γa of the steel plate 7 and the backing steel plate 9. It is sufficient if it is provided between the two.

以上のような孔埋め溶接によれば、裏当て鋼板９を鋼板
７の下面７ａに密着しておらず、貫通孔８の下端を開放
しているので、溶接金属を貫通孔８の下端から露出する
まで貫通孔８内に盛って、貫通孔８をその下端まで良好
に溶接金属で埋めることができる。従って、貫通孔８を
孔埋め溶接してなる溶接部１１を、少なくとも貫通孔８
の下端まで割れ等がない良好なものにできる。According to the hole filling welding described above, the backing steel plate 9 is not in close contact with the lower surface 7a of the steel plate 7, and the lower end of the through hole 8 is left open, so that the weld metal is exposed from the lower end of the through hole 8. By filling the through hole 8 with the weld metal until the weld metal reaches its lower end, the through hole 8 can be satisfactorily filled with weld metal up to its lower end. Therefore, the welded part 11 formed by filling the through hole 8 with welding is at least the through hole 8.
It can be made in good condition with no cracks or the like up to the bottom end.

このため、鋼板７の下面７ａから出張っている溶接部１
１の下部１１ａ　ｆ、アークエアガウジングにより除去
するだけで、鋼板７の下面７ａ側から溶接部１１の手直
しをする溶接を行なう必要がなくなる。また、裏当て鋼
板９は鋼板７の下面７ａに隙間をあけて仮付けしている
ので、アークエアガウジングにより鋼板７０下面７ａを
除去することなく仮付けど一ド１２０１部を除去して、
裏当て鋼板９ヶ外すことができる。従って、鋼板７の下
面７ａを手直しする溶接を行なう必要がなくなる。下部
１１ａを除去した溶接部１１は、従来と同様、鋼板７の
上面７ｂおよび下面７ａ側からグラインダにより、面仕
上けがなされ、その際、下面７ａに残った仮付はビード
１２の残部も一緒に除去される。For this reason, the welded portion 1 protruding from the lower surface 7a of the steel plate 7
By simply removing the lower part 11af of the steel plate 1 by arc air gouging, there is no need to perform welding to repair the welded portion 11 from the lower surface 7a side of the steel plate 7. In addition, since the backing steel plate 9 is temporarily attached to the lower surface 7a of the steel plate 7 with a gap, the portion 1201 of the temporary attachment can be removed without removing the lower surface 7a of the steel plate 70 by arc air gouging.
Nine backing steel plates can be removed. Therefore, there is no need to perform welding to modify the lower surface 7a of the steel plate 7. The welded part 11 from which the lower part 11a has been removed is surface-finished using a grinder from the upper surface 7b and lower surface 7a sides of the steel plate 7, as in the past, and at that time, the tack remaining on the lower surface 7a is removed along with the rest of the bead 12. removed.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、この発明によれば、鋼板に穿設さ
れた貫通孔を良好に孔埋め溶接でき、溶接部の品質を良
好なものとできる。また、溶接部を手直しする溶接を行
なう必要がないので、溶接部の面仕上までの工程数が短
縮される。As explained above, according to the present invention, a through hole drilled in a steel plate can be satisfactorily filled and welded, and the quality of the welded part can be made good. Further, since there is no need to perform welding to modify the welded portion, the number of steps required to finish the surface of the welded portion is shortened.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は、この発明の溶接方法を示す説明図、第２図お
よび第３図は、それぞれ従来の別の溶接方法を示す説明
図である。図面において、７・・・鋼板、　　　　　　
７ａ・・下面、７ｂ・・・上面、　　　　　　　８・・
・貫通孔、９・・裏当て鋼板、　　　１０・・・スペー
サ、１１・・・溶接部、　　　　　１２・・・仮付はビ
ード。FIG. 1 is an explanatory view showing the welding method of the present invention, and FIGS. 2 and 3 are explanatory views showing other conventional welding methods, respectively. In the drawings, 7... steel plate,
7a...bottom surface, 7b...top surface, 8...
- Through hole, 9... Backing steel plate, 10... Spacer, 11... Welded part, 12... Bead for temporary attachment.

Claims (1)

【特許請求の範囲】 鋼板に穿設された貫通孔を塞ぐ裏当て板を、前記鋼板の
１方の面に当てて、前記鋼板の他方の面側から前記貫通
孔内に溶接金属を盛ることにより、前記貫通孔を前記溶
接金属で埋める、鋼板の片面孔埋め溶接方法において、 前記鋼板の前記１方の面と前記裏当て板との間に隙間を
設けるためのスペーサを介して、前記裏当て板を前記鋼
板の前記１方の面に当て、そして、前記鋼板の前記他方
の面側から前記貫通孔内に前記溶接金属を盛ることを特
徴とする、鋼板の片面孔埋め溶接方法。[Scope of Claims] A backing plate that closes a through hole drilled in a steel plate is applied to one side of the steel plate, and weld metal is poured into the through hole from the other side of the steel plate. In the one-side hole-filling welding method for a steel plate in which the through-hole is filled with the weld metal, A single-side hole-filling welding method for a steel plate, characterized in that a patch plate is applied to the one surface of the steel plate, and the weld metal is deposited into the through hole from the other side of the steel plate.