JPH03221217A - Forming method for plate material - Google Patents
Forming method for plate materialInfo
- Publication number
- JPH03221217A JPH03221217A JP2015402A JP1540290A JPH03221217A JP H03221217 A JPH03221217 A JP H03221217A JP 2015402 A JP2015402 A JP 2015402A JP 1540290 A JP1540290 A JP 1540290A JP H03221217 A JPH03221217 A JP H03221217A
- Authority
- JP
- Japan
- Prior art keywords
- standing
- mold
- cover
- burr
- collar
- 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
- 238000000034 method Methods 0.000 title claims description 24
- 239000000463 material Substances 0.000 title claims description 14
- 238000010008 shearing Methods 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 abstract description 11
- 239000003973 paint Substances 0.000 abstract description 8
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 238000010422 painting Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、例えば電力量計のせん用防止カバーや水量
計の金属ケースなどを成形加工する板状材料の成形加工
法の改良に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an improvement in a method of forming a plate-like material for forming, for example, a scratch-preventing cover for a power meter or a metal case for a water meter. be.
第１１図は従来の板状材料の成形加工法による電力量計
のせん用防止カバー（以下単にカバーという）を示す斜
視図であり、図において、（１）は鋼板製のカバー、（
２）は電線引込用の切り欠き、（３１は別の方向から電
線を引き込む場合に打ち欠いて使用するノックアウト、
（４）はカバー（１）を電力量計（図示せず）に固定す
るねじ用の穴、（５）は三角形状に突設された封印用の
突起であり、カバー（１）は電力量計の電線接続部（図
示せず）を覆うように取り付けられる。FIG. 11 is a perspective view showing a scratch-preventing cover (hereinafter simply referred to as cover) for a watt-hour meter made by the conventional molding method of a plate-shaped material.
2) is a notch for drawing in electric wires, (31 is a knockout that is used by cutting out when drawing in electric wires from another direction,
(4) is a hole for a screw to fix the cover (1) to a power meter (not shown), (5) is a triangular sealing protrusion, and the cover (1) is It is attached to cover the electric wire connection part (not shown) of the meter.
次に、カバー（１）を成形加工する方法について説明す
る。第１２図は従来の成形加工法による中間工程におけ
るカバー本体（１１）の外観を示す斜視図であり、製作
の便宜上カバー（１）を２個同時に成形してから中央部
を切断して個々のカバー（１）としている、まず、プレ
スにより鋼板を所定の形状に打ち抜いた後、数段階に分
けて第１２図に示される様に２個を一体として、絞り深
さが所定の深さよりも少し深い所定の形状に成形する。Next, a method of molding the cover (1) will be explained. FIG. 12 is a perspective view showing the appearance of the cover main body (11) in an intermediate process by the conventional molding method. For convenience of manufacturing, two covers (1) are molded at the same time, and then the central part is cut to separate the individual parts. The cover (1) is made by first punching a steel plate into a predetermined shape using a press, and then dividing the pieces into one piece in several stages as shown in Figure 12. Form into a deep predetermined shape.
さらに第１２図の一点鎖線Ａ部でプレスにより切断して
不要な部分（１２）を取り除き、さらに図の中央部の二
点鎖線Ｂ部で切断、２個に分離して第１１図に示される
カバ−（１）とする。なお、（１３）は２個に分断する
ときに捨てられるスクラップ部である。この後、切断に
より生じた端面（ｌａｄ、 （ｌｂ）のかえりを除去す
る。Further, the unnecessary portion (12) is removed by cutting with a press along the dashed-dotted line A in FIG. Cover (1). Note that (13) is a scrap portion that is discarded when dividing into two pieces. Thereafter, the burrs on the end faces (lad, (lb)) caused by cutting are removed.
かえりを除去するのは、取り扱い時にかえりにより切傷
を受けたりする危険の防止やカバー（１）を塗装する場
合、かえり部か尖っているため塗料の付着性か悪く錆発
生の原因となるの防止する等のためである。The purpose of removing the burrs is to prevent the risk of being cut by the burrs when handling, and to prevent the cover (1) from being painted because the burrs are sharp, making it difficult for paint to adhere to them and causing rust. This is for the purpose of doing so.
し発明か解決しようとする課題〕
従来の板状材料の成形加工法においては以上のように、
鋼板を所定の深さＤよりも少し深い所定の形状に絞り加
工したケース本体（１１）からプレスにより第１２図の
一点鎖線Ａ部で切断して不要な部分（１２）を取り除き
所定の深さＤのカバー（１）となるようにしているので
、切断により発生した端面（ｌａ＞のかえりを別の工程
で除去しなければならず、又、端面（１ａ）はコ状をし
ているので除去工程が複雑となりこの部分のかえりの除
去にかなりの時間を要していた。[Problems to be solved by the invention] As described above, in the conventional method of forming plate-shaped materials,
A case body (11) is drawn from a steel plate into a predetermined shape that is slightly deeper than a predetermined depth D. The unnecessary portion (12) is removed by cutting the case body (11) along the dashed line A in Fig. 12 using a press to obtain the predetermined depth. Since the cover (1) is made to be D, the burrs on the end surface (la) caused by cutting must be removed in a separate process, and since the end surface (1a) is U-shaped, The removal process was complicated and it took a considerable amount of time to remove the burrs in this area.
この発明は、上記のような問題点を解消するためになさ
れたものであり、かえりの除去を要する部分を少なくし
、加工時間を減少できる板状材料の成形加工法を提供す
ることを目的とする。This invention was made to solve the above-mentioned problems, and its purpose is to provide a method for forming plate-shaped materials that can reduce the number of parts that require burr removal and reduce processing time. do.
この発明に係る板状材料の成形加工法は、板状材料を、
端部に鍔状部を設けるとともに所定の深さより浅い所定
の形状に絞り加工後、型を用いて鍔状部を立ち起こし所
定の深さとするとともにこの立ち起こす際に鍔状部のか
えりを型に圧接しながら行なうようにしたものである。The method for forming a plate-like material according to the present invention includes forming a plate-like material by
After providing a flange at the end and drawing it into a predetermined shape that is shallower than a predetermined depth, the flange is raised using a mold to a predetermined depth, and the burr of the flange is shaped using a mold. This is done while being pressed against the surface.
この発明においては、予め鍔状部を設けておき、剪断に
より発生した鍔状部のかえりを型に圧接しながら立ち起
こすことにより、かえりが破断面側へ押圧されて尖鋭な
部分がなくなるので、取り扱い時に切り傷を受けたり、
塗装したとき塗料の付着性が低下することがない、従っ
てこの部分のかえりの除去を行わなくとも良い。In this invention, a flange-like part is provided in advance, and by raising the burr of the flange-like part generated by shearing while pressing it against the mold, the burr is pressed toward the fracture surface and the sharp part is eliminated. If you get a cut while handling it,
When painted, the adhesion of the paint does not deteriorate, so there is no need to remove the burrs in this area.
なお、鍔状部の寸法は立ち起こしたときに所定の深さに
なるようにされており、立ち起こした後寸法合せのため
の切断を要しないので、立ち起こし後のかえりの発生は
ない。Note that the dimensions of the brim portion are set to be a predetermined depth when raised, and cutting for size adjustment is not required after being raised, so that burrs do not occur after being raised.
第１図〜第９図はこの発明の一実施例を示すものであり
、第１図はプレスによる打ち抜きにより鋼板から打ち抜
いたブランクを示す斜視図、第２図は端部にフランジ部
を設けて絞り加工を行なったカバー本体を示す斜視図、
第３図はフランジ部を所定の巾に切断して形成した鍔状
部を有するカバー本体を示す斜視図、第４図は鍔状部か
立ち起こされた状態のカバー本体を示す斜視図、第５図
は切り欠きゃノックアウトを設けたカバー本体を示す斜
視図、第６図は鍔状部の立ち起こしに用いられる型を示
す断面図、第７図（ａ）〜（ｆ）は鍔状部の立ち起こし
を説明する説明図、第８図はカバー本体の端部の断面図
、第９図は端部への塗料の付着状態を示す断面図である
。Figures 1 to 9 show an embodiment of the present invention, with Figure 1 being a perspective view of a blank punched out of a steel plate by punching with a press, and Figure 2 showing a blank with a flange provided at the end. A perspective view showing the cover body after drawing processing,
Fig. 3 is a perspective view showing a cover body having a flange-like part formed by cutting a flange part to a predetermined width; Fig. 4 is a perspective view showing the cover main body with the flange-like part raised up; Figure 5 is a perspective view showing the cover body provided with a knockout, Figure 6 is a sectional view showing a mold used to raise the flanged part, and Figures 7 (a) to (f) are the flanged part. FIG. 8 is a sectional view of the end of the cover body, and FIG. 9 is a sectional view showing how paint is applied to the end.
この場合も、第１２図に示された従来のものと同様にカ
バー２個分を一体にして成形後、切断分離して２個のカ
バーとするものであり、まず、鋼板からプレスにより第
１図に示される形状のブランク（２１）を打ち抜く。次
にブランク（２１）の周辺部を押さえながら所定の深さ
Ｄよりもｄたけ浅く深さＤ−ｄに絞り加工を行なってカ
バー本体（２２）を形成し、端部にフランジ部（２２ａ
）を設けて第２図の状態とする。続いて、フランジ部（
２２ａ ）を第２図の一点鎖線Ｃでかえりが第２図で下
方側に発生するようにプレスで切断して、第３図に示さ
れるように所定の巾を有する鍔状部（２２ｂ ）を備え
た状態とする。次に、第６図に示される型（３０）を用
いて鍔状部（２２ｂ ）を絞り（深さ）の方向と反対方
向に、即ち第３図において下方向に立ち起こして所定の
深さのカバー本体（２３）とする。第６図はこの工程に
用いる型（３０〉の構成を示す断面図であり、図におい
て、（３１〉はベース、（３２）は固定金型、（３３）
は所定値以上の力が加わると押されて下方へ移動するよ
うにされた受は型、（３４）は移動金型、（３５）は半
製品のカバー本体（２２）を押さえる押えである。In this case as well, like the conventional one shown in Fig. 12, two covers are integrally molded and then cut and separated to form two covers.First, the first cover is made from a steel plate by pressing. A blank (21) of the shape shown in the figure is punched out. Next, while holding down the peripheral part of the blank (21), a drawing process is performed to a depth D-d, which is d shallower than a predetermined depth D, to form a cover body (22), and a flange part (22a) is formed at the end.
) to obtain the state shown in Fig. 2. Next, the flange part (
22a) is cut using a press along the dotted chain line C in FIG. 2 so that the burr is on the lower side in FIG. Be prepared. Next, using the mold (30) shown in FIG. 6, the brim (22b) is raised in the opposite direction to the drawing (depth) direction, that is, downward in FIG. 3, to a predetermined depth. The cover body (23) is FIG. 6 is a sectional view showing the configuration of the mold (30) used in this process. In the figure, (31> is the base, (32) is the fixed mold, (33)
A receiver which is pushed and moved downward when a force exceeding a predetermined value is applied is a mold, (34) is a movable mold, and (35) is a presser foot that holds down the semi-finished cover body (22).
次に鍔状部（２２ｂ）の立ち起こし工程の詳細を第７図
により説明する。カバー本体（２２）は第６図、第７図
に示されるように切断時に発生したかえり＜２２Ｃ）が
下向き、即ち受は型（３３）に対向するようにして固定
金型（３２）に装着されており、押え（３５）を下降さ
せて押え、移動金型（３４）を第７図（ａ）〜（ｅ）の
如く次第に下降させると、まず（ｂ）図の如くかえり（
２２ｃ ）の先端部か受は型（３３）に圧接され、さら
に移動金型（３４）の下降にともない鍔状部（２２ｂ
）か下方へ伸ばされていき、かえり（２２ｃ）は受は型
（３３）に強く圧接された状態で摺動し、第７図（Ｃ）
に示されるように左方へ倒された状態となる。さらに移
動金型（３４）を下降させると受は型（３３）も所定の
力を受けながら下降することにより第７図（ｄ）〜（ｆ
）に示されるように鍔状部（２２ｂ ）が立ち起こされ
て第４図に示されるように所定の深さＤを有するカバー
本体（２３）とされるとともにかえり（２２ｃ ）は強
い力を受けながら受は型（３３）と摺動されることによ
り押し潰される。即ち、第８図にカバー本体（２４）の
端面（２３ａ ）の断面の詳細を示すように、図の一点
鎖線で示されるかえり（２２ｃ ）が受は型（３３）と
摺動されることにより押し潰されて図の実線で示される
ように破断面（２３ｄ ）側へ倒れ込むように変形され
る。第３図における鍔状部（２２ｂ ’）の巾は第４図
のように立ち起こされたときにカバー本体（２３）が所
定の深さＤになるようにされているので、第１２図に示
される従来の成形加工法によるもののように一点鎖線Ａ
部にて切断する必要がなく、この後、切り欠き（■、ノ
ックアウトｔ３）、ねじ用の穴（４）、封印用の突起（
５１を加工して第５図に示されるカバー本体（２４）に
加工し、二点鎖線Ｂ部にて切断して２個のカバー（１）
（第１１図）と同様のものとする。この後、Ｂ部にて切
断されて生じる端面（２４ｂ ）のかえりを除去する。Next, details of the process of raising the brim portion (22b) will be explained with reference to FIG. As shown in Figures 6 and 7, the cover body (22) is attached to the fixed mold (32) with the burr <22C) generated during cutting facing downward, that is, with the receiver facing the mold (33). When the presser foot (35) is lowered and the movable mold (34) is gradually lowered as shown in FIGS. 7(a) to (e), the burrs (
The tip end of the mold (22c) is pressed against the mold (33), and as the movable mold (34) descends, the flanged portion (22b) is pressed against the mold (33).
) is stretched downward, and the burr (22c) slides while being strongly pressed against the mold (33), as shown in Fig. 7 (C).
It is in a state where it is tilted to the left as shown in . When the movable mold (34) is further lowered, the receiver also lowers the mold (33) while receiving a predetermined force.
), the flange (22b) is raised up to form a cover body (23) having a predetermined depth D as shown in FIG. 4, and the burr (22c) receives a strong force. Meanwhile, the receiver is crushed by sliding with the mold (33). That is, as shown in FIG. 8 showing the details of the cross section of the end surface (23a) of the cover body (24), the burr (22c) shown by the dashed line in the figure is caused by the holder sliding with the mold (33). It is crushed and deformed so as to fall toward the fracture surface (23d) as shown by the solid line in the figure. The width of the brim (22b') in FIG. 3 is such that the cover body (23) has a predetermined depth D when raised as shown in FIG. As shown in the conventional molding method, the dashed line A
There is no need to cut the cutout (■, knockout t3), the screw hole (4), and the sealing protrusion (
51 to form the cover body (24) shown in Fig. 5, and cut along the two-dot chain line B to obtain two covers (1).
(Fig. 11). Thereafter, the burr on the end surface (24b) produced by cutting at section B is removed.
以上のように、従来かえりの除去を要していた第１１図
に示されるカバー（１）の端面（ｌａ＞に相当する第５
図のカバー本体（２４）の端面（２３ａ＞は第８図に示
されるようにそのかえり（２２ｃ ）が押し潰されてい
るので、切傷を受けたり、塗料の付着性が悪くなるおそ
れがないのでかえりを取る必要がない。As mentioned above, the 5th section corresponding to the end surface (la> of the cover (1) shown in FIG. 11, which conventionally required removal of burrs)
The end face (23a> of the cover body (24) in the figure has its burr (22c) crushed as shown in Figure 8, so there is no risk of it being cut or that the paint will not adhere well. There is no need to remove the burr.
なお、参考までに、第８図に示される端面（２３ａ ）
に塗料（２５）を付着させたときの状態を第９図に示す
。第９図でも明らかなように、塗料（２４）は押し潰さ
れたかえり（２２ｃ ）を覆うように付着することにな
り、この部分に錆か発生するのを防止できる。For reference, the end surface (23a) shown in FIG.
FIG. 9 shows the state when the paint (25) is applied to the surface. As is clear from FIG. 9, the paint (24) adheres to cover the crushed burr (22c), thereby preventing rust from forming in this area.
なお、上記一実施例では電力量計のせん用防止カバー（
１）について示したが、水量計のケースやその他のもの
であっても良く、又、板状材料は金属板に限られず剪断
によりかえりが発生するものについては同様の効果を奏
する。In addition, in the above-mentioned embodiment, the electric energy meter's scratch prevention cover (
Although 1) has been shown, it may be a water meter case or other items, and the plate-shaped material is not limited to a metal plate, and the same effect can be achieved with any material that burrs due to shearing.
又、この実施例においては比較的深い絞り加工を行うた
め、絞り加工時の材料の流れ速度差により第２図に示さ
れるようにカバー本体（２２）の角部においてフランジ
部（２２ａ ）の巾か広くなり、巾寸法の不均一が大き
いので、フランジ部（２２ａ ）の巾を予め大きめにし
ておいて、これを切断して所定寸法の鍔状部（２２ｂ
）とする工程を設けているが、例えば第１Ｏ図に示され
る容器（４１〉の如く、比較的浅い絞り加工の場合は鍔
状部（４１ａ）の巾の不均一は小さいので、切断工程を
省いてここのまま上記一実施例と同様の工程により（ｂ
）図の一点鎖線Ｅの部分で鍔状部（４１ａ）を立ち起こ
し、所定の容器（４２）とすれば良い。但し、この場合
、かえりの方向はかえりが受は型（３３）側（第６図）
（第１Ｏ図（ａ）で上向き〉に向くようにしておく必要
がある。かえりを受は型（３３）と摺動させるためであ
る。In addition, since relatively deep drawing is performed in this embodiment, the width of the flange portion (22a) at the corner of the cover body (22) is reduced due to the difference in flow speed of the material during the drawing process, as shown in FIG. Since the width of the flange portion (22a) is large and the width is largely uneven, the width of the flange portion (22a) is made larger in advance, and this is cut to form the flange portion (22b) of a predetermined size.
), but in the case of a relatively shallow drawing process, such as the container (41> shown in Figure 1O), the non-uniformity of the width of the flange (41a) is small, so the cutting process is By the same process as in the above embodiment except for this step (b
) The flange-shaped portion (41a) may be raised up at the portion indicated by the dashed-dotted line E in the figure to form a predetermined container (42). However, in this case, the direction of the burr is that the burr is on the mold (33) side (Fig. 6).
It is necessary to keep the burr facing upward (in Figure 1O (a)). This is because the burr is to slide against the mold (33).
以上のように、この発明によれば鍔状部を設けてこれを
立ち起こすときにかえりを型に圧接させなから行うよう
にしたので、かえりの除去を要する部分が減少し、加工
時間の少ない板状材料の成形加工法を提供できる。As described above, according to the present invention, the burr is not brought into pressure contact with the mold when the flange-like part is provided and the burr is raised up, so the number of parts that require burr removal is reduced, and the processing time is reduced. A method for forming plate-shaped materials can be provided.
第１図〜第９図はこの発明の一実施例を示すものであり
、第１図〜第５図はブランクからカバーに成形加工する
各工程途中におけるカバー本体を示す斜視図、第６図は
鍔状部の立ち起こしに用いられる型を示す断面図、第７
図（ａ）〜（ｆ）は鍔状部の立ち起こし工程を説明する
説明図、第８図はカバーの端部の断面図、第９図は端部
への塗料の付着状態を示す断面図、第１Ｏ図（ａ） 、
（ｂ）はこの発明の他の実施例を示す斜視図、第１１
図は従来の戒形加工法におけるカバーを示す斜視図、第
１２図は従来の成形加工法における成形途中のカバー本
体を示す斜視図である。
図において、（１）はカバー、 （２２）〜（２４）は
カバー本体、 （２２ｂ） 、 （４１ａ）は鍔状部、
（２２Ｃ）はかえり（３０）は型、 （３２）は固定
金型、 （３３）は受は型、 （３４）は移動金型、
（４１＞は容器である。
なお、各図中同一符号は同−又は相当部分を示す。1 to 9 show an embodiment of the present invention, and FIGS. 1 to 5 are perspective views showing the cover body in the middle of each process of forming a cover from a blank, and FIG. Cross-sectional view showing the mold used for raising the brim, No. 7
Figures (a) to (f) are explanatory diagrams illustrating the process of raising the brim, Figure 8 is a sectional view of the end of the cover, and Figure 9 is a sectional view showing the state of paint adhesion to the end. , Figure 1O(a),
(b) is a perspective view showing another embodiment of the present invention, No. 11
FIG. 12 is a perspective view showing a cover in the conventional molding method, and FIG. 12 is a perspective view showing the cover body in the middle of forming in the conventional molding method. In the figure, (1) is the cover, (22) to (24) are the cover body, (22b) and (41a) are the flanges,
(22C) The burr (30) is the mold, (32) is the fixed mold, (33) is the receiver is the mold, (34) is the movable mold,
(41> is a container. In each figure, the same reference numerals indicate the same or corresponding parts.
Claims (1)
により所定の深さのものに成形する板状材料の成形加工
法において、端部に鍔状部を設けるとともに上記所定の
深さよりも浅い所定の形状に絞り加工する工程及び型を
用いて上記鍔状部を上記深さ方向と反対の方向に上記鍔
状部のかえりを上記型に圧接させながら立ち起こし上記
所定の深さとする工程を備えた板状材料の成形加工法。In a method of forming a plate-like material in which a plate-like material that generates burrs during shearing is formed into a predetermined depth by shearing and drawing, a flange is provided at the end and a predetermined depth shallower than the predetermined depth is provided at the end. and a step of raising the flanged portion using a die in a direction opposite to the depth direction while pressing the burr of the flanged portion against the die to the predetermined depth. A method for forming plate-shaped materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015402A JPH0796133B2 (en) | 1990-01-24 | 1990-01-24 | Forming method of plate material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015402A JPH0796133B2 (en) | 1990-01-24 | 1990-01-24 | Forming method of plate material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03221217A true JPH03221217A (en) | 1991-09-30 |
| JPH0796133B2 JPH0796133B2 (en) | 1995-10-18 |
Family
ID=11887738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2015402A Expired - Fee Related JPH0796133B2 (en) | 1990-01-24 | 1990-01-24 | Forming method of plate material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0796133B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016110952A (en) * | 2014-12-10 | 2016-06-20 | 大崎電気工業株式会社 | Terminal cover for distribution equipment |
| EP3859027B1 (en) | 2018-09-28 | 2023-08-02 | JFE Steel Corporation | High strength steel plate for sour-resistant line pipe and method for manufacturing same, and high strength steel pipe using high strength steel plate for sour-resistant line pipe |
| RU2767261C1 (en) | 2018-09-28 | 2022-03-17 | ДжФЕ СТИЛ КОРПОРЕЙШН | High-strength steel plate for acid-resistant pipeline and method of producing steel plate, high-strength steel pipe in which high-strength steel plate is used for acid-resistant pipeline |
-
1990
- 1990-01-24 JP JP2015402A patent/JPH0796133B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0796133B2 (en) | 1995-10-18 |
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