JP2717312B2 - Seam welding method - Google Patents
Seam welding methodInfo
- Publication number
- JP2717312B2 JP2717312B2 JP1196179A JP19617989A JP2717312B2 JP 2717312 B2 JP2717312 B2 JP 2717312B2 JP 1196179 A JP1196179 A JP 1196179A JP 19617989 A JP19617989 A JP 19617989A JP 2717312 B2 JP2717312 B2 JP 2717312B2
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- Prior art keywords
- plate member
- seam welding
- welding
- plate
- seam
- Prior art date
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、異なる板厚の２枚の板部材のシーム溶接方
法に関し、特に溶接部における板部材間の段差を減少さ
せ得るようなシーム溶接方法に関する。Description: TECHNICAL FIELD The present invention relates to a seam welding method for two plate members having different thicknesses, and particularly to a seam welding method capable of reducing a step between the plate members in a welded portion. About the method.
従来より、比較的小板厚の鋼板で部材を製作する場合
に、部材重量軽減の為板厚の異なる板部材の端部同士を
シーム溶接装置でシーム溶接することが広く行なわれて
いる。ところが、板厚の異なる板部材をシーム溶接して
部材を製作した場合、厚い方の板部材と薄い方の板部材
の夫々の溶接される部分の溶融速度の差により、例えば
第７図に示すように部材100の溶接部101において厚い方
の板部材102の端部が薄い方の板部材103の上側に突出し
た段部101aが形成される。このように溶接部101に段部1
01aが形成されると、段部101aにおいて応力集中を招き
部材100の強度特に疲労強度が著しく低下するという問
題がある。2. Description of the Related Art Conventionally, when a member is manufactured from a steel plate having a relatively small thickness, end portions of plate members having different thicknesses are seam-welded with a seam welding device to reduce the weight of the member. However, when members are manufactured by seam welding plate members having different plate thicknesses, for example, as shown in FIG. 7 due to the difference in the melting rates of the welded portions of the thicker plate member and the thinner plate member. As described above, in the welded portion 101 of the member 100, the step portion 101a is formed in which the end of the thicker plate member 102 protrudes above the thinner plate member 103. In this way, the step 1 is
When 01a is formed, there is a problem that stress concentration is caused in stepped portion 101a, and strength of member 100, particularly fatigue strength, is remarkably reduced.
そこで、溶接部における段部をなくし溶接部の溶接形
状をなだらかにするために、例えば特公昭49−3382号公
報、特開昭58−53383号公報には、溶接の前に厚い方の
板部材の溶接される部分を加工して薄くすることにより
溶接の際の段部の形成を防止するシーム溶接の方法と装
置が提案され、また特開昭58−13483号公報には、溶接
後に溶接部をロール圧延することにより溶接部に形成さ
れた段部の段差を減少させ溶接部形状をなだらかにする
シーム溶接の方法と装置が提案されている。Therefore, in order to eliminate the step portion in the welded portion and to make the welded shape of the welded portion smoother, for example, Japanese Patent Publication No. 49-3382 and Japanese Patent Application Laid-Open No. 58-53383 disclose thick plate members before welding. A method and apparatus for seam welding have been proposed to prevent the formation of a step during welding by processing and thinning the portion to be welded, and Japanese Patent Application Laid-Open No. 58-13483 discloses a welding method. A method and an apparatus for seam welding have been proposed in which a roll is roll-rolled to reduce a step in a step formed in a weld and to make the shape of the weld smooth.
しかしながら、上記各公報に提案されているシーム溶
接の方法や装置では、圧延ローラや特殊な装置を設置し
なければならず設備コストが増大するという問題があ
る。加えて、溶接工程の前あるいは後に別工程を設けね
ばならず溶接作業の能率が低下するという問題がある。
また、そうした設備や別工程を設けずに、例えば溶接時
の加圧力を大きくしたり或いは厚い方の板部材と薄い方
の板部材のラップ量を小さくすることにより溶接部の段
差を減少させることも考えられるが、その場合第８図に
示すように溶接部111において薄い方の板部材113の端部
の板厚が減少して凹部111bが形成され、部材の強度が低
下するという問題が解消されない。本発明の目的は、特
別の工程を設けることなく溶接品質を高め得るようなシ
ーム溶接方法を提供することである。However, the seam welding method and apparatus proposed in each of the above publications has a problem in that a rolling roller and a special device must be installed, and equipment costs increase. In addition, another step must be provided before or after the welding step, which causes a problem that the efficiency of the welding operation is reduced.
Also, without providing such facilities or separate processes, reducing the step in the welded area by, for example, increasing the pressing force during welding or reducing the amount of lap between the thicker plate member and the thinner plate member. In this case, as shown in FIG. 8, the problem that the thickness of the end of the thinner plate member 113 in the welded portion 111 is reduced to form the concave portion 111b and the strength of the member is reduced is solved. Not done. An object of the present invention is to provide a seam welding method capable of improving welding quality without providing a special step.
請求項１に係るシーム溶接方法は、板厚の異なる２枚
の板部材の端部を重ね合せてシーム溶接する方法であっ
て、剪断打抜き加工機を用いて厚い方の板部材を打抜き
加工する際に、ポンチ側刃とダイス側刃間のクリアラン
スを大きくして加工することにより、その厚い方の板部
材の端部の溶接に供する部分にだれ面を形成し、次に、
上記厚い方の板部材の溶接に供する部分のだれ面を外向
きにして薄い方の板部材の端部に重ね合せてシーム溶接
するものである。The seam welding method according to claim 1 is a method of seam welding by overlapping the ends of two plate members having different plate thicknesses, and punching a thicker plate member using a shearing punching machine. At this time, by processing by increasing the clearance between the punch-side blade and the die-side blade, a drooping surface is formed at a portion provided for welding at the end of the thicker plate member,
The seam welding is performed by superposing the thin plate member on the end with the drooping surface of the portion provided for welding the thicker plate member facing outward.
請求項２のシーム溶接方法は、請求項１の発明におい
て、上記だれ面は、上記厚い方の板部材の端部に向かっ
て板厚が漸減するように上記板部材の一方の面が他方の
面へ湾曲した面であることを特徴とするものである。According to a second aspect of the present invention, in the first aspect of the invention, the one surface of the plate member has the other surface so that the thickness gradually decreases toward the end of the thicker plate member. It is characterized by being a curved surface.
請求項１に係るシーム溶接方法においては、剪断打抜
き加工機を用いて厚い方の板部材を打ち抜き加工する際
に、ポンチ側刃とダイス側刃間のクリアランスを大きく
して加工することにより、その厚い方の板部材の溶接に
供する部分にだれ面を形成し、次に厚い方の板部材の溶
接に供する部分のだれ面を外向きにして薄い方の板部材
の端部に重ね合せてシーム溶接する。In the seam welding method according to claim 1, when punching a thicker plate member using a shearing punching machine, the processing is performed by increasing the clearance between the punch side blade and the die side blade. A drooping surface is formed at the portion to be used for welding the thicker plate member, and then the drooping surface of the portion to be used for welding the thicker plate member is turned outward and overlaps the end of the thinner plate member to be seamed. Weld.
このとき、シーム溶接機の電極からの加圧力により、
厚い方の板部材と薄い方の板部材との端部とはだれ面の
先端部の薄肉側から肉厚側へ溶融し上下の電極で圧延さ
れるので溶接部に段部が形成されずなだらかに接合され
る。従って、溶接部に応力集中を招くことがなく部材の
強度が大幅に向上する。加えて、特別の設備及び工程を
別に設けずに簡単にだれ面を形成できるので、設備コス
トの増加を防止することが出来る。At this time, by the pressing force from the electrode of the seam welding machine,
The ends of the thicker plate member and the thinner plate member are melted from the thinner side of the tip of the drooping surface to the thicker side and are rolled by the upper and lower electrodes. Joined. Therefore, the strength of the member is greatly improved without causing stress concentration at the welded portion. In addition, since a drooping surface can be easily formed without separately providing special equipment and processes, an increase in equipment cost can be prevented.
請求項２のシーム溶接方法においては、上記だれ面
は、上記厚い方の板部材の端部に向かって板厚が漸減す
るように上記板部材の一方の面が他方の面の方へ湾曲し
た面であるので、溶接部に段部が形成されずになだらか
に接合される。In the seam welding method according to claim 2, one surface of the plate member is curved toward the other surface such that the plate thickness gradually decreases toward an end of the thicker plate member. Since it is a surface, it is smoothly joined without forming a step in the welded portion.
請求項１に係るシーム溶接方法によれば、以上〔作
用〕の項で説明したように厚い方の板部材の打抜き加工
時に、ポンチ側刃とダイス側刃間のクリアランスを大き
くして加工することにより、その剪断端部にだれ面を形
成するという簡単な方法によって、工程数を増すことな
くまた特殊な装置を用いることなくシーム溶接部をなだ
らかなテーパ状に形成することが出来、溶接部の品質を
高め溶接部の強度を高めることができる。According to the seam welding method of the first aspect, as described in the above section, when the thicker plate member is punched, the clearance between the punch side blade and the die side blade is increased. By the simple method of forming a drooping surface at the sheared end, the seam weld can be formed into a gentle taper without increasing the number of steps and without using a special device. The quality can be increased and the strength of the weld can be increased.
請求項２のシーム溶接方法によれば、上記だれ面は、
上記厚い方の板部材の端部に向かって板厚が漸減するよ
うに上記板部材の一方の面が他方の面の方へ湾曲した面
であるので、溶接部に段部が形成されずになだらかに接
合される。According to the seam welding method of claim 2, the drooping surface is
Since one surface of the plate member is curved toward the other surface so that the plate thickness gradually decreases toward the end of the thicker plate member, no step is formed in the welded portion. Joined gently.
以下、本発明の実施例について図面に基いて説明す
る。Hereinafter, embodiments of the present invention will be described with reference to the drawings.
本実施例は、第１図に示す４ドアハードトップ型自動
車のボディのセンターピラーインナ１を製作する際のシ
ーム溶接方法に本発明を適用したものである。In this embodiment, the present invention is applied to a seam welding method for manufacturing a center pillar inner 1 of a body of a four-door hard-top type automobile shown in FIG.
上記センターピラーインナ１は、その上部を構成する
板厚0.8mmの冷間圧延鋼板からなる第１板部材２の端部2
aとその下部を構成する板厚1.2mmの熱間圧延鋼板からな
る第２板部材３の端部3aとをシーム溶接により接合して
製作する。第２図〜第６図はセンターピラーインナ１の
シーム溶接工程を示したものである。第１工程におい
て、剪断打抜き加工機により鋼板から第１板部材２と第
２板部材３との打ち抜きを行う。その際、第２板部材３
の端部3aにだれ面４を形成する。第２図は剪断打抜き加
工機のダイス５に第２板部材３の素材鋼板3Aを載置した
状態を示したもので、上方から下降して素材鋼板3Aを打
ち抜く剪断打抜き加工機のポンチ７の刃7aとダイス５の
刃5aとの間には約1mmのクリアランス８を設け、素材鋼
板3Aは第２板部材３の端部3aを形成する右端部をクリア
ランス８以上にダイス５から突出して載置する。The center pillar inner 1 has an end portion 2 of a first plate member 2 made of a cold-rolled steel plate having a thickness of 0.8 mm and constituting an upper portion thereof.
a and the lower end 3a of the second plate member 3 made of a hot-rolled steel plate having a thickness of 1.2 mm, which is a lower part thereof, are joined by seam welding. 2 to 6 show the seam welding process of the center pillar inner 1. FIG. In the first step, the first plate member 2 and the second plate member 3 are punched from a steel plate by a shearing punching machine. At this time, the second plate member 3
A drooping surface 4 is formed at the end 3a of the rim. FIG. 2 shows a state in which the material steel plate 3A of the second plate member 3 is placed on the die 5 of the shearing punching machine. A clearance 8 of about 1 mm is provided between the blade 7a and the blade 5a of the die 5, and the material steel plate 3A is mounted so that the right end forming the end 3a of the second plate member 3 projects beyond the clearance 8 from the die 5. Place.
次に、第３図に示すようにポンチ７を下降させると、
第２板部材３が打ち抜かれるとともに刃7aのせん断力と
クリアランス８により、その端部3aは下方に少し曲げら
れるとともにその上面には湾曲しただれ面４が形成され
る。Next, as shown in FIG. 3, when the punch 7 is lowered,
While the second plate member 3 is punched out, the end 3a is slightly bent downward by the shearing force of the blade 7a and the clearance 8, and a curved drooping surface 4 is formed on the upper surface thereof.
尚、第１板部材２の打ち抜きの際の刃7aと刃5aとのク
リアランスは、通常の僅かなクリアランスとする。Note that the clearance between the blade 7a and the blade 5a at the time of punching the first plate member 2 is a normal slight clearance.
第２工程において、第４図に示すようにシーム溶接機
10により第１板部材２と第２板部材３とのシーム溶接を
行う。上記シーム溶接装置10について簡単に説明する
と、上下動可能な左右方向向きの回転入力軸11の左端部
には円板上の上部電極12が取付けられ、回転入力軸11の
上方のアーム13の左端部にはエアシリンダからなる加圧
用シリンダ14が上下方向向きに設けられ、加圧シリンダ
14のロッド14aは回転入力軸11に装着された円筒形軸受
部材15に固着されている。一方、回転入力軸11の下方の
アーム19には、円筒形の軸支持部材16が設けられ、軸支
持部材16に左右方向向きに回転自在に設けられた枢支軸
17の左端部には、円板状の下部電極18が取付けられ、枢
支軸17はアーム19内の回転入力軸で回転駆動可能になっ
ている。In the second step, as shown in FIG.
According to 10, seam welding between the first plate member 2 and the second plate member 3 is performed. The above seam welding apparatus 10 will be briefly described. An upper electrode 12 on a disk is attached to the left end of a rotational input shaft 11 that can move up and down and is directed to the left and right, and a left end of an arm 13 above the rotary input shaft 11. A pressurizing cylinder 14 composed of an air cylinder is provided in the vertical direction.
The fourteen rods 14a are fixed to a cylindrical bearing member 15 mounted on the rotary input shaft 11. On the other hand, a cylindrical shaft support member 16 is provided on an arm 19 below the rotary input shaft 11, and a pivot shaft provided on the shaft support member 16 so as to be rotatable in the left-right direction.
A disk-shaped lower electrode 18 is attached to the left end of 17, and the pivot 17 is rotatable by a rotation input shaft in an arm 19.
第１板部材２と第２板部材３とを溶接する場合には、
第１板部材２の端部2aを下側にして第２板部材３の端部
3aを端部2aの上側に且つだれ面４を外向きにして重ね合
せ、その状態で第４図に２点鎖線で示すように上部電極
12と下部電極18の間に左右方向向きに配設し、加圧シリ
ンダ14の加圧力により端部2aと端部3aとの重ね合せ部分
を上部電極12と下部電極18とで挟持する。When welding the first plate member 2 and the second plate member 3,
End of second plate member 3 with end 2a of first plate member 2 facing down
3a is placed on the upper side of the end 2a and the drooping surface 4 is directed outward, and in this state, as shown by a two-dot chain line in FIG.
The upper electrode 12 and the lower electrode 18 sandwich the overlap between the end 2a and the end 3a by the pressing force of the pressurizing cylinder 14.
その状態で上部電極12を第４図に矢印で示す方向に回
転させ下部電極18を反射方向に等速で回転させながら上
部電流12から下部電流18へ溶接電流を流すと、第１板部
材２と第２板部材３は前方向に駆動されるともにその重
ね合せ部分が前端から後端に亙って溶接される。In this state, when the welding current is passed from the upper current 12 to the lower current 18 while rotating the upper electrode 12 in the direction indicated by the arrow in FIG. 4 and rotating the lower electrode 18 at a constant speed in the reflection direction, the first plate member 2 The second plate member 3 is driven forward and the overlapped portion is welded from the front end to the rear end.
尚、溶接条件は電流値15000A、加圧力500kgf、溶接速
度50mm/sに設定する。第５図・第６図は第１板部材２の
端部2aと第２板部材３の端部3aとが溶接される状態を示
したもので、第１板部材２と第２板部材３とが上部電極
12と下部電極18の間に配設された状態では、端部3aはだ
れ面４の端縁で端部2aに当接している。溶接を開始する
と上部電極12からの加圧力により、端部3aはその肉薄の
先端部から肉厚側に端部2aとの当接部分を広げながら溶
融する端部2aと相互に溶け込んで接合される。その際、
第６図に示すようにだれ面４の傾斜は両電極12・18で押
し潰されてなだらかになるとともに、端部2aはその厚み
を減少させながら溶けこむので、溶接部に段部が形成さ
れずテーパ形状に溶接される。The welding conditions were set at a current value of 15000 A, a pressure of 500 kgf, and a welding speed of 50 mm / s. 5 and 6 show a state where the end 2a of the first plate member 2 and the end 3a of the second plate member 3 are welded, and the first plate member 2 and the second plate member 3 are welded. And the upper electrode
In a state of being disposed between the lower electrode 12 and the lower electrode 18, the end 3a is in contact with the end 2a at the edge of the drooping surface 4. When welding is started, the end portion 3a is mutually melted and joined to the melting end portion 2a while expanding the contact portion with the end portion 2a from the thin end portion to the thick side by the pressing force from the upper electrode 12. You. that time,
As shown in FIG. 6, the inclination of the drooping surface 4 becomes smooth by being crushed by the two electrodes 12 and 18, and the end 2a melts while reducing its thickness, so that a step is formed in the welded portion. It is welded in a tapered shape.
このように、第１板部材２と第２板部材３とはその溶
接部において段部が形成されずなだらかに接合されるの
で、溶接品質が高められセンターピラーインナ１の強度
特に疲労強度の大幅な向上を図ることが出来る。また、
溶接部をなだらかに形成するために、別に設備及び工程
を設けなくてもよいので、設備コストの増加を防ぐこと
が出来、溶接の能率の向上を図ることが出来る。As described above, since the first plate member 2 and the second plate member 3 are gently joined without forming a step at the welded portion, the welding quality is enhanced, and the strength of the center pillar inner 1, particularly the fatigue strength, is greatly increased. Can be greatly improved. Also,
In order to form the welded portion gently, it is not necessary to provide separate equipment and steps, so that an increase in equipment cost can be prevented and the efficiency of welding can be improved.
尚、上記だれ面４を形成するに際し、クリアランス８
を設けずに刃5aと刃7aとのシャー角を変えることにより
形成することも可能である。更に、本発明は自動車のボ
ディの部材に限らず種々の金属板製の部材もシーム溶接
して製作するのにも適用し得ることは言うまでもない。In forming the drooping surface 4, the clearance 8
It is also possible to form by changing the shear angle between the blade 5a and the blade 7a without providing the blade. Further, it goes without saying that the present invention can be applied not only to members of the body of an automobile but also to members made of various metal plates by seam welding.
第１図〜第６図は本発明の実施例を示すもので、第１図
はセンターピラーインナの平面図、第２図は剪断打抜き
加工機による第２板部材の打ち抜き直前の状態を示す要
部断面図、第３図は第２板部材の打抜き直後の状態を示
す要部断面図、第４図はシーム溶接装置の要部斜視図、
第５図はシーム溶接装置の電極と板部材との要部断面
図、第６図はシーム溶接装置の電極と溶接された板部材
の要部断面図、第７図・第８図は従来技術に係るもの
で、第７図は板部材のシーム溶接部の断面図、第８図は
板部材のシーム溶接部の断面図である。 ２……第１板部材、３……第２板部材、2a・3a……端
部、４……だれ面、10……シーム溶接装置。1 to 6 show an embodiment of the present invention. FIG. 1 is a plan view of a center pillar inner, and FIG. 2 is a view showing a state immediately before punching of a second plate member by a shearing punching machine. FIG. 3 is a sectional view of a main part showing a state immediately after punching of a second plate member, FIG. 4 is a perspective view of a main part of a seam welding apparatus,
FIG. 5 is a cross-sectional view of a main part of an electrode and a plate member of a seam welding apparatus, FIG. 6 is a cross-sectional view of a main part of a plate member welded to an electrode of a seam welding apparatus, and FIGS. 7 is a sectional view of a seam weld of the plate member, and FIG. 8 is a sectional view of a seam weld of the plate member. 2... First plate member, 3... Second plate member, 2 a and 3 a.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 森本 茂典 広島県安芸郡府中町新地３番１号 マツ ダ株式会社内 (56)参考文献 特開 昭56−17190（ＪＰ，Ａ) 特開 昭61−176490（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shigenori Morimoto 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Inside Mazda Co., Ltd. (56) References JP-A-56-17190 (JP, A) JP-A-61 -176490 (JP, A)
Claims (2)
せてシーム溶接する方法であって、剪断打抜き加工機を
用いて厚い方の板部材を打抜き加工する際に、ポンチ側
刃とダイス側刃間のクリアランスを大きくして加工する
ことにより、その厚い方の板部材の端部の溶接に供する
部分にだれ面を形成し、 次に、上記厚い方の板部材の溶接に供する部分のだれ面
を外向きにして薄い方の板部材の端部に重ね合せてシー
ム溶接することを特徴とするシーム溶接方法。1. A method for seam welding by overlapping the ends of two plate members having different plate thicknesses, wherein a punching side is used when punching a thicker plate member using a shearing punching machine. By machining with a large clearance between the blade and the die-side blade, a drooping surface is formed at a portion to be used for welding the end of the thicker plate member. A seam welding method characterized in that a part to be provided has a drooping surface facing outward and is overlapped with an end of a thinner plate member and seam-welded.
に向かって板厚が漸減するように上記板部材の一方の面
が他方の面の方へ湾曲した面であることを特徴とする請
求項１に記載のシーム溶接方法。2. The drooping surface according to claim 1, wherein one surface of the plate member is curved toward the other surface so that the plate thickness gradually decreases toward an end of the thicker plate member. The seam welding method according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1196179A JP2717312B2 (en) | 1989-07-27 | 1989-07-27 | Seam welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1196179A JP2717312B2 (en) | 1989-07-27 | 1989-07-27 | Seam welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0360873A JPH0360873A (en) | 1991-03-15 |
| JP2717312B2 true JP2717312B2 (en) | 1998-02-18 |
Family
ID=16353515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1196179A Expired - Lifetime JP2717312B2 (en) | 1989-07-27 | 1989-07-27 | Seam welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2717312B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH683402A5 (en) * | 1991-04-09 | 1994-03-15 | Elpatronic Ag | A method of seam welding of sheet metal blanks. |
| KR100245967B1 (en) * | 1995-02-23 | 2000-04-01 | 와다 아끼히로 | Mash-seam welding method and mash-seam welding machine |
| KR100832343B1 (en) * | 2007-05-23 | 2008-05-26 | 주식회사 포스코 | Thin sheets seam welding apparatus in the silicon steel sheets making process |
| DE102009037226A1 (en) * | 2009-08-12 | 2011-02-17 | Umicore Ag & Co. Kg | Method and device for joining precious metal sheet |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5953150B2 (en) * | 1979-07-18 | 1984-12-24 | 三菱電機株式会社 | seam welding machine |
-
1989
- 1989-07-27 JP JP1196179A patent/JP2717312B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0360873A (en) | 1991-03-15 |
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