JPS646877B2 - - Google Patents
Info
- Publication number
- JPS646877B2 JPS646877B2 JP21145381A JP21145381A JPS646877B2 JP S646877 B2 JPS646877 B2 JP S646877B2 JP 21145381 A JP21145381 A JP 21145381A JP 21145381 A JP21145381 A JP 21145381A JP S646877 B2 JPS646877 B2 JP S646877B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- wire
- flux
- butt
- butt welding
- 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.)
- Expired
Links
- 238000003466 welding Methods 0.000 claims description 95
- 230000004907 flux Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 14
- 238000005491 wire drawing Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000000047 product Substances 0.000 description 10
- 238000000605 extraction Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000002893 slag Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000035553 feeding performance Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 208000026438 poor feeding Diseases 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Description
本発明は、自動溶接に使用される溶接用フラツ
クス入りワイヤのバツト溶接方法に関する。
一般に伸線加工業において線材同志を接続し、
連続作業を行う場合、通電により接触抵抗及び材
料の固有抵抗に基づく発熱を利用して接触部付近
を溶接温度まで高め、加圧して圧着するバツト溶
接やフラツシユ溶接方法等の突合せ抵抗溶接が用
いられている。バツト溶接困難な断面積の大きい
場合や薄肉の板材及び管材は、フラツシユ溶接が
使用され、被溶接材の断面積の小さい溶接用ワイ
ヤでは、装置が簡単で、安価、さらに容易に安全
確実に作業が行えるバツト溶接が利用され、ワイ
ヤ径により、種々の容量のバツト溶接機を使い分
けている。溶接用ワイヤのバツト溶接の手順は、
(1) 線材表面、被溶接材の端面を研摩し、端面を
そろえ、突合せる。
(2) 通電し溶接部付近を抵抗発熱によつて加熱す
る。
(3) スプリングなどによる、アプセツト圧力をか
ける。
(4) 溶接後バリを取除き、焼鈍を行う。
であり、この手順により溶接用ソリツドワイヤは
問題なく溶接される。
ところが小径鋼管内に溶接作業性、溶着金属の
じん性等、必要な種々の特性を与えるフラツクス
を充填してなる溶接用フラツクス入りワイヤにお
いては、溶接用ソリツドワイヤと同様な手順でバ
ツト溶接を行うと、バツト溶接の熱で充填された
フラツクスが溶融し、スラグとなり、被溶接材の
境界面に残留するため、融合不充分となり、トラ
ブルの発生要因となる。
本発明は上記従来の問題点を解消するものであ
る。すなわち通常の合せ目有の溶接用フラツクス
入りワイヤはもちろんのこと、被覆鋼管が溶接接
合管であるシームドワイヤ、合せ目なしのシーム
レスワイヤの如き溶接用フラツクス入りワイヤの
接続が良好に行え、溶接結果が以後の工程又は使
用状態に好影響を与えるバツト溶接方法を提供す
ることを目的とする。この目的を達成する本発明
の要旨とするところは、小径鋼管にフラツクスを
充填してなる溶接用フラツクス入りワイヤのバツ
ト溶接方法であつて、接続すべき２本のワイヤ端
部のフラツクスを溶接代Ｌよりも長いフラツクス
取出し長さL′で除去した後バツト溶接するように
し、更に、該ワイヤがバツト溶接後に伸線加工を
受ける製造中のワイヤである場合は、溶接代Ｌ
８−6A／100mm（Ａは減面率でＡ10％）とし、
該ワイヤが製品ワイヤである場合は、フラツクス
取出し長さL′溶接代Ｌ＋８mmとすることにあ
る。
本発明ではこのように溶接用フラツクス入りワ
イヤ（以下ワイヤという）の端部のフラツクスを
溶接代よりも長い範囲で例えばドリル等で除去し
ているのでバツト溶接の熱によりフラツクスがス
ラグ化することはなく、従つて融合状態の良好な
溶接接合部が得られる。線材のバツト溶接で良好
な溶接接合部を得るために考慮すべきフアクター
として被溶接材の種類に応じた電流密度、加圧
力、通電時間等の他にソリツドワイヤでは電極か
らの被溶接材の出し代ｌが重要で、該出し代が短
い場合ダイバーンと呼ばれる欠陥が発生し、逆に
出し代が長いと、加圧力によつて座屈する。被溶
接材の材質やワイヤ径により良好な出ししろは、
ほぼ決定される。
これに対して溶接用フラツクス入りワイヤでは
出し代ｌを考慮しただけでは不充分で、さらに溶
接代Ｌ、フラツクス取出し長さL′を必須のフアク
ターとして加える必要があり、上記本発明の要旨
の如く規定することにより良好なバツト溶接部を
得ることができる。
以下本発明のバツド溶接方法を第１図に従つて
説明する。ここで本発明でいうフラツクス取出し
長さL′、溶接代Ｌ、出し代ｌとは第１図に示すよ
うに、
フラツクス取出し長さL′……ワイヤ端からフラ
ツクス３を取出して形成した空〓の長さ
溶接代Ｌ……溶接により消耗するワイヤの長さ
出し代ｌ……電極から突出したワイヤの長さ
を意味する。第１図のａはバツト溶接開始状態を
示し、接合すべき２本のワイヤ２，２′端部を出
し代ｌだけ突出して一方を固定電極１に、又他方
を移動電極１′に把持し、ワイヤ端面をそろえて
突合せた状態を示している。ワイヤ２，２′はそ
の端部のフラツクス３を溶接代Ｌよりも長い長さ
分L′だけ溶接に先立ち除去しているので、通電に
よるワイヤの抵抗熱でフラツクスがスラグ化する
等の弊害はない。この状態で電極１，１′を介し
て交流の大電流を通じ、溶接部付近を抵抗発熱に
より加熱し、適当な高温度に達したときに、ワイ
ヤ軸方向に強圧を加えて接合する。ｂ図はこの接
合状態を示したものであり、加圧接合の結果接合
部の内外周面にバリ４が形成される。このバリの
うち外部のバリはグラインダー等により比較的簡
単に除去されるが、内部のバリは除去できずその
ままの状態で以後の工程あるいは製品に供され
る。又５は溶接に際してワイヤ端部からのフラツ
クス取出し長さL′を溶接代Ｌよりも長くとつてあ
ることから溶接後においても残留する空洞であ
る。
次に(イ)溶接用フラツクス入りワイヤの製造工程
中においてバツト溶接を施こした後に伸線加工を
施す場合のバツト溶接および(ロ)製品溶接用フラツ
クス入りワイヤにおけるバツト溶接のそれぞれに
ついて好ましい実施態様を説明する。
(イ)の場合、（製造時のバツト溶接）
製品溶接用フラツクス入りワイヤの寸法（外径
はおよそ1.2〜4.0mmであり、従つて製造中のワイ
ヤはそれ以上の管径であるので通電量は大電流か
つ通電時間は長くなり、溶接熱によりフラツクス
は影響を受けやすく、このため好ましくはフラツ
クス取出し長さL′を少なくとも溶接代Ｌよりも
0.5mm長く（L′Ｌ＋0.5mm）とする。又溶接代Ｌ
が長すぎるとバリが出すぎて除去不能な管内部の
バリにより以後の伸線工程において断線を頻発す
る結果をもたらす。これは管内部のバリが固いた
め伸線工程で引伸されず、このためダイスとバリ
に挾または管の肉厚が局部的に薄くなることによ
る。このため製造途中のワイヤのバツト溶接にお
いて、溶接代Ｌを
Ｌ８−6A／100mm ……(1)
（Ａは減面率（％）でＡ10％）
とすることが望ましい。なお減面率Ａは
Ａ＝D2／0−D2／1／D2／0×100（％）
D0：バツト溶接時の線径
D1：最終線径とした。
第２図は(1)式の根拠となるバツト溶接以後のワ
イヤのトータル減面率Ａ（％）と溶接代Ｌ（mm）と
の関係を実験的に求めた図であり〇印はバツト溶
接後に良好に伸線を行なえることを、又×印は断
線により最終径（製品径）に至らないことを示
し、これから該〇区域と×区域はＬ＝８−6A／
100の線を境に２分されていることがわかる。
実施例 １
溶接用フラツクス入りワイヤ（シームドワイ
ヤ）の製造工程においてワイヤ径5.0mmφの部分
でバツト溶接を行ないワイヤを接続した後最終製
品径1.2mmφまで伸線を行う実験を行つた。この
ときのトータル減面率ＡはＡ＝94.2％であり(1)式
によると溶接代ＬはＬ2.35mmとなり、これは第
１表の実験結果に裏づけられている。
The present invention relates to a butt welding method for welding flux-cored wire used in automatic welding. Generally, wire rods are connected together in the wire drawing industry.
When performing continuous work, butt resistance welding, such as butt welding or flash welding, is used, in which the area around the contact area is raised to the welding temperature by applying electricity to generate heat based on the contact resistance and the specific resistance of the material, and then pressurized and crimped. ing. Flat welding is used for cases with large cross-sectional areas that are difficult to butt weld, as well as thin-walled plates and pipes. For welding wires with small cross-sectional areas, the equipment is simple, inexpensive, and the work can be done easily and safely. Butt welding is used, and butt welding machines with various capacities are used depending on the wire diameter. The procedure for butt welding welding wire is as follows: (1) Polish the surface of the wire and the end face of the material to be welded, align the end faces, and butt. (2) Apply electricity to heat the area around the welded area by resistance heat generation. (3) Apply upset pressure using a spring, etc. (4) After welding, remove burrs and perform annealing. With this procedure, the solid wire for welding can be welded without any problem. However, with flux-cored wire for welding, which is made by filling a small-diameter steel pipe with flux that provides various necessary properties such as welding workability and the toughness of the weld metal, it is difficult to butt weld using the same procedure as for solid wire for welding. The heat of butt welding melts the filled flux and turns it into slag, which remains on the interface of the welded materials, resulting in insufficient fusion and causing trouble. The present invention solves the above-mentioned conventional problems. In other words, not only ordinary welding flux-cored wires with seams, but also seamed wires in which the coated steel pipe is a welded joint pipe, seamless wires without seams, etc. can be connected well, and the welding results are improved. The object of the present invention is to provide a butt welding method that has a positive effect on subsequent processes or usage conditions. The gist of the present invention to achieve this object is to provide a butt welding method for welding flux-cored wire made by filling a small-diameter steel pipe with flux. Butt welding is performed after removing the flux at a length L' that is longer than L, and if the wire is a wire that is being manufactured and undergoes wire drawing after butt welding, the welding allowance L
8-6A/100mm (A is the area reduction rate of A10%),
If the wire is a product wire, the flux extraction length L' should be set to the welding distance L+8 mm. In the present invention, the flux at the end of the welding flux-cored wire (hereinafter referred to as wire) is removed by, for example, a drill in a range longer than the welding margin, so that the flux does not turn into slag due to the heat of butt welding. Therefore, a well-fused welded joint can be obtained. In order to obtain a good weld joint when butt welding wire rods, factors to be considered include the current density, pressing force, energization time, etc. depending on the type of material to be welded, as well as the amount of protrusion of the material to be welded from the electrode in the case of solid wires. l is important; if the protrusion is short, a defect called diverne will occur; if the protrusion is long, buckling will occur due to the pressure applied. Depending on the material of the material to be welded and the wire diameter,
Almost decided. On the other hand, in the case of flux-cored wire for welding, it is not enough to take into account the extension l, and it is necessary to add the welding allowance L and the flux extraction length L' as essential factors. By specifying this, a good butt weld can be obtained. The butt welding method of the present invention will be explained below with reference to FIG. Here, the flux extraction length L', welding allowance L, and extraction allowance l as used in the present invention are as shown in FIG. Length of welding margin L: Length of wire consumed by welding Length of wire: Length of wire protruding from the electrode. Figure 1a shows the start state of butt welding, in which the ends of the two wires 2 and 2' to be joined are protruded by an amount l, and one is held by the fixed electrode 1 and the other by the movable electrode 1'. , shows a state in which the wire end surfaces are aligned and butted. Since the flux 3 at the ends of the wires 2 and 2' is removed prior to welding by a length L' that is longer than the welding allowance L, there is no problem such as the flux turning into slag due to resistance heat of the wires due to energization. do not have. In this state, a large alternating current is passed through the electrodes 1, 1' to heat the welded area by resistance heat generation, and when a suitable high temperature is reached, strong pressure is applied in the axial direction of the wires to join them. Figure b shows this joining state, and as a result of pressurized joining, burrs 4 are formed on the inner and outer circumferential surfaces of the joined portion. Of these burrs, external burrs can be removed relatively easily with a grinder or the like, but internal burrs cannot be removed and are used in subsequent processes or products as they are. Further, reference numeral 5 is a cavity that remains even after welding because the length L' of flux taken out from the wire end is set longer than the welding distance L during welding. Next, we will discuss preferred embodiments for (a) butt welding when wire drawing is performed after butt welding during the manufacturing process of flux-cored wire for welding, and (b) butt welding in flux-cored wire for product welding. Explain. In the case of (a), (butt welding during manufacturing) the dimensions of the flux-cored wire for product welding (the outer diameter is approximately 1.2 to 4.0 mm, and therefore the wire being manufactured has a tube diameter larger than that, so the amount of current applied) The current is large and the energization time is long, and the flux is easily affected by welding heat. Therefore, it is preferable that the flux extraction length L' is at least longer than the welding width L.
Make it 0.5mm longer (L'L + 0.5mm). Also, welding allowance L
If the length is too long, too much burr will be produced and the burr inside the tube, which cannot be removed, will result in frequent wire breakage in the subsequent wire drawing process. This is because the burr inside the tube is hard and is not drawn during the wire drawing process, which causes the die and the burr to form a gap or the wall thickness of the tube to become locally thin. For this reason, when butt welding wire during manufacture, it is desirable to set the welding distance L to L8-6A/100mm (1) (A is the area reduction rate (%) of A10%). Incidentally, the area reduction rate A is A=D 2 / 0 - D 2 / 1 /D 2 / 0 × 100 (%) D 0 : Wire diameter at the time of butt welding D 1 : Final wire diameter. Figure 2 is an experimentally determined relationship between the total area reduction rate A (%) of the wire after butt welding and the welding distance L (mm), which is the basis for equation (1). The X mark indicates that the final diameter (product diameter) will not be reached due to wire breakage.
You can see that it is divided into two by the 100 line. Example 1 In the manufacturing process of welding flux-cored wire (seamed wire), an experiment was conducted in which butt welding was performed on a portion of the wire having a diameter of 5.0 mm, the wire was connected, and the wire was drawn to a final product diameter of 1.2 mm. The total area reduction rate A at this time is A = 94.2%, and according to equation (1), the welding distance L is L2.35 mm, which is supported by the experimental results shown in Table 1.
【表】
(ロ)の場合（製品のバツト溶接）
製品溶接用フラツクス入りワイヤのバツト溶接
の接合の良否は溶接時におけるワイヤの使用性能
上の問題に係わるものであり、この場合は上記(イ)
の溶接代の大小よりも溶接代Ｌとフラツクス取出
し長さL′の差すなわち溶接後にワイヤ内に形成さ
れる空洞の大きさが問題となる。すなわち該空洞
が大きいとワイヤの空洞部すなわち溶接部におけ
る強度が低くなり、溶接時においてコンジツトチ
ユーブ内での抵抗、送給ローラ等でワイヤの座屈
曲り、偏径が発生し、送給不良をもたらすととも
に溶接性能上でも問題を発生し易くなる。このた
め製品ワイヤのバツト溶接において、ワイヤ端部
からのフラツクス取出し長さL′と溶接代Ｌとの関
係をL′Ｌ＋８mmとすることが望ましい。
実施例 ２
ワイヤ径1.2mmφ、肉厚0.3mmの製品溶接用フラ
ツクス入りワイヤ（シームドワイヤ）をバツト溶
接により接続し、溶接に供した場合の送給性能を
実験により求め、これを第２表に示した。なおバ
ツト溶接の出し代は２mmとし、溶接条件は電流
280A、電圧28V、ワイヤ速度30cm／分としコン
ジツトチユーブ長さを６ｍとして送給性の良否は
送給モータの負荷電流の変動状態にて判定した。[Table] Case (B) (Product Butt Welding) The quality of the butt welding of flux-cored wire for product welding is related to the usability of the wire during welding, and in this case, the above (I) )
The difference between the welding allowance L and the flux extraction length L', that is, the size of the cavity formed in the wire after welding, is more important than the size of the welding allowance. In other words, if the cavity is large, the strength of the wire cavity, that is, the welded part, will be low, and during welding, the resistance within the conduit tube, the wire buckling and bending due to the feed roller, etc., and uneven diameter will occur, resulting in poor feeding. This causes problems in terms of welding performance. For this reason, in the butt welding of product wire, it is desirable that the relationship between the flux extraction length L' from the wire end and the welding distance L be L'L+8 mm. Example 2 The feeding performance was experimentally determined when a product welding flux-cored wire (seamed wire) with a wire diameter of 1.2 mmφ and a wall thickness of 0.3 mm was connected by butt welding and used for welding, and this is shown in Table 2. Ta. The protrusion for butt welding is 2 mm, and the welding conditions are
At 280 A, a voltage of 28 V, a wire speed of 30 cm/min, and a conduit tube length of 6 m, the feedability was judged based on the fluctuation of the load current of the feed motor.
【表】
注：境界面にスラグが残留し融合不良
第２表から明らかなように実験No.２〜５におい
てはいずれも送給性は良好で、溶接性も良好であ
つたが、No.６、７はバツト溶接後のワイヤ内の空
洞部分が大きいために送給性はワイヤに座屈、曲
り、偏径が発生して悪く、さらに溶接ビードの外
観も悪かつた。
以上説明したように本発明の溶接用フラツクス
入りワイヤのバツト溶接方法によれば、バツト溶
接の熱によりフラツクスがスラグ化することな
く、良好な融合状態の溶接接合部が得られるので
ワイヤ相互の接続強度は従来に比べて向上するこ
とになり、ワイヤ製造時のワイヤの接続に適用す
ると以後良好なる伸線を行なえ、又製品ワイヤの
接続に適用すると溶接に際して良好なる送給性を
もたらす。[Table] Note: Poor fusion due to slag remaining on the interface.As is clear from Table 2, in Experiment Nos. 2 to 5, the feedability and weldability were good in all cases, but in No. In Nos. 6 and 7, the wire had a large cavity after butt welding, so the feeding performance was poor as buckling, bending, and uneven diameter occurred in the wire, and the appearance of the weld bead was also poor. As explained above, according to the butt welding method of flux-cored wire for welding of the present invention, the flux does not turn into slag due to the heat of butt welding, and a well-fused welded joint can be obtained, so that the wires can be connected to each other. The strength is improved compared to the conventional method, and when applied to wire connections during wire manufacturing, subsequent wire drawing can be performed better, and when applied to product wire connections, it provides good feedability during welding.
第１図はバツト溶接の説明図、第２図は溶接代
と減面率との関係を示すグラフである。
図面で１，１′は電極、２，２′は溶接ワイヤ、
３はフラツクス４はバリ、５は空洞である。
FIG. 1 is an explanatory diagram of butt welding, and FIG. 2 is a graph showing the relationship between welding allowance and area reduction rate. In the drawing, 1 and 1' are electrodes, 2 and 2' are welding wires,
3 is a flux, 4 is a burr, and 5 is a cavity.
Claims (1)
フラツクス入りワイヤのバツト溶接方法であつ
て、 接続すべき２本のワイヤ端部のフラツクスを溶
接代よりも長いフラツクス取出し長さで除去した
後バツト溶接するようにし、更に、 該ワイヤがバツト溶接後に伸線加工を受ける製
造中のワイヤである場合は、溶接代８−6A／
100mm（Ａは減面率でＡ10％）とし、 該ワイヤが製品ワイヤである場合は、フラツク
ス取出し長さ溶接代＋８mmとすることを特徴と
する溶接用フラツクス入りワイヤのバツト溶接方
法。[Claims] 1. A method for butt welding a flux-cored wire for welding, which is made by filling a small-diameter steel pipe with flux, in which the flux at the ends of two wires to be connected is removed to a length longer than the welding allowance. If the wire is a wire in production that will undergo wire drawing after butt welding, the welding allowance should be 8-6A/
A method for butt welding a flux-cored wire for welding, characterized in that the welding length is 100 mm (A is the area reduction rate of A10%), and when the wire is a product wire, the flux take-out length is welding allowance + 8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21145381A JPS58112671A (en) | 1981-12-25 | 1981-12-25 | Butt welding method for flux-cored wire for welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21145381A JPS58112671A (en) | 1981-12-25 | 1981-12-25 | Butt welding method for flux-cored wire for welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58112671A JPS58112671A (en) | 1983-07-05 |
| JPS646877B2 true JPS646877B2 (en) | 1989-02-06 |
Family
ID=16606191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21145381A Granted JPS58112671A (en) | 1981-12-25 | 1981-12-25 | Butt welding method for flux-cored wire for welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58112671A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0668458U (en) * | 1993-03-05 | 1994-09-27 | 保則 伊津野 | Pseudo-bait needle hook for squid fishing |
| JPH0714871U (en) * | 1993-08-25 | 1995-03-14 | ナガヤ工業有限会社 | Squid fishing tackle support |
-
1981
- 1981-12-25 JP JP21145381A patent/JPS58112671A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0668458U (en) * | 1993-03-05 | 1994-09-27 | 保則 伊津野 | Pseudo-bait needle hook for squid fishing |
| JPH0714871U (en) * | 1993-08-25 | 1995-03-14 | ナガヤ工業有限会社 | Squid fishing tackle support |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58112671A (en) | 1983-07-05 |
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