JPH0426921B2 - - Google Patents
Info
- Publication number
- JPH0426921B2 JPH0426921B2 JP59107233A JP10723384A JPH0426921B2 JP H0426921 B2 JPH0426921 B2 JP H0426921B2 JP 59107233 A JP59107233 A JP 59107233A JP 10723384 A JP10723384 A JP 10723384A JP H0426921 B2 JPH0426921 B2 JP H0426921B2
- Authority
- JP
- Japan
- Prior art keywords
- flange
- rolling
- web
- cold
- forming
- 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 - Lifetime
Links
- 238000005096 rolling process Methods 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 239000013067 intermediate product Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 6
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 4
- 206010010904 Convulsion Diseases 0.000 description 9
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 238000005097 cold rolling Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/095—U-or channel sections
Description
【発明の詳細な説明】
本発明は熱間孔型圧延加工と冷間成形加工とを
組合わせて、ビレツト又は板材から平行なフラン
ジ部を有する溝形鋼を製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing channel steel having parallel flanges from billets or plates by combining hot hole rolling and cold forming.
一般に普通鋼など素材として溝形鋼を製造する
場合、熱間孔型圧延によつて所望の最終形状の溝
形鋼に成形していた。しかしステンレス鋼なかで
もSUS304などのオーステナイト系ステンレス鋼
などにおいては、前記鋼に比較して変形能が悪
く、高温での変形抵抗が大きく、焼付きが発生し
易いため、前記熱間孔型圧延において成形した場
合、製品に表面疵が多く発生するとともに圧延ロ
ールが早期に摩耗するなどの欠点が有り、実用に
供し得ないものであつた。したがつて、従来
SUS304などのステンレス鋼を素材として溝形鋼
を製造する場合、一般には大変非能率ではある
が、２本のアングルを長手方向に平行に並べ、突
合わせ溶接を行い、ついで表裏に形成されたビー
ドを切削によつて除去し、溝形鋼を製造してい
る。 Generally, when producing channel steel as a raw material such as ordinary steel, the channel steel is formed into a desired final shape by hot hole rolling. However, among stainless steels, austenitic stainless steels such as SUS304 have poor deformability compared to the above-mentioned steels, have large deformation resistance at high temperatures, and are prone to seizure, so they cannot be used in hot hole rolling. When molded, the product had drawbacks such as a large number of surface defects and premature wear of the rolling rolls, making it impossible to put it to practical use. Therefore, conventionally
When manufacturing channel steel using stainless steel such as SUS304, it is generally very inefficient to line up two angles in parallel in the longitudinal direction, butt weld them, and then weld beads formed on the front and back sides. is removed by cutting to produce channel steel.
このように、従来ステンレス溝形鋼の製造にお
いては生産性が悪く、かつコスト的にも非常に高
いものになるにもかかわらず溶接により製造され
ており、近年、ステンレス溝形鋼が建築用材料、
装飾材料としての需要が増加していることと併せ
て、安価なステンレス溝形鋼の製造法の開発が強
く要望されていた。 In this way, stainless steel channel steel has traditionally been manufactured by welding, despite its low productivity and extremely high cost.In recent years, stainless steel channel steel has been used as a construction material. ,
In conjunction with the increasing demand for decorative materials, there has been a strong demand for the development of an inexpensive manufacturing method for stainless channel steel.
本発明者等は、従来の孔型圧延、ユニバーサル
圧延における上記欠点に鑑みてなしたもので、本
発明者等はオーステナイト系ステンレス鋼が他鋼
種に比べて変形能が悪く、かつ高温での変形抵抗
が高く、容易に焼付きが発生し易いという材料的
要因と、圧延時フランジ部においてロール周速に
大きな差が生じ、フランジ部に焼付きが発生し易
いという成形上の要因について考慮し、検討を重
ねた。 The present inventors have made this work in view of the above-mentioned drawbacks in conventional groove rolling and universal rolling. Considering the material factor of high resistance and easy seizure, and the forming factor that there is a large difference in roll circumferential speed at the flange during rolling, which makes the flange easy to seize. After much consideration.
オーステナイト系ステンレス鋼の焼付き現象
は、高温高圧下で相対すべりが生じた時に発生す
ることは一般に知られている。そこで、所定温度
に加熱した状態での圧延をできるだけ相対すべり
速度が小さくなるような条件で、かつ冷間では不
可能な大変形を伴う加工に絞り、その後冷間加工
によつて目的の形状に仕上加工することを考え
た。 It is generally known that the seizure phenomenon of austenitic stainless steel occurs when relative slip occurs under high temperature and high pressure. Therefore, we focus on rolling heated to a predetermined temperature under conditions that minimize the relative slip velocity and that involve large deformations that are impossible with cold rolling, and then cold working to achieve the desired shape. I thought about finishing it.
この考えを基に検討した結果、孔型熱間加工と
冷間成形加工を組み合わせることにより、前記問
題を解決し、安価なオーステナイト系ステンレス
溝形鋼の製造方法に開発に成功したものである。 As a result of studies based on this idea, we solved the above problem by combining hole-type hot working and cold forming, and succeeded in developing an inexpensive manufacturing method for austenitic stainless channel steel.
すなわち本発明は、所定温度に加熱された圧延
素材を孔型圧延によりフランジ部およびウエブ部
の肉厚を製品寸法とほぼ同一の厚さで、かつその
横断面が直線状で、最終形状の隅角部に相当する
箇所にほぼ直角な突出部と、突出部の裏面に凹部
を形成した中間製品を成形する第１工程と、前記
中間製品のウエブ部と直線状にある一対のフラン
ジ部をウエブ部と直角なフランジ部に冷間成形す
る第２工程の二つの工程に分けたことを特徴とす
るものである。 In other words, the present invention involves groove rolling a rolled material heated to a predetermined temperature so that the wall thickness of the flange portion and web portion is approximately the same as the product dimensions, the cross section is linear, and the corner of the final shape is formed. A first step of molding an intermediate product having a protrusion that is approximately perpendicular to the corner and a recess formed on the back surface of the protrusion, and forming a pair of flanges that are linear with the web of the intermediate product. The second step is cold forming into a flange section perpendicular to the second step.
そして本発明はビレツトなどの圧延素材から横
断面が前記のような中間素材を孔型圧延によつて
成形するに、互いに平行に配設され、少なくとも
一方が駆動装置によつて回転させられる圧延ロー
ルを用いて、フランジ部におけるロール周速差を
小さくするため、フランジ部をウエブ部と同様に
直線状となすものである。さらに本発明は前記中
間製品から互いに平行なフランジ部と、フランジ
部と直角で平坦なウエブ部を有する溝形鋼を冷間
ロール加工するに、被加工材であるオーステナイ
ト系ステンレス鋼は冷間加工により著しく加工硬
化する特性があり、１パスで所望の加工量が得ら
れ難しいことを考慮し、互いに平行に配設させら
れた冷間ロールによるパス回数を少なくとも２パ
ス以上とし、ウエブと同様に直線形状のフランジ
部を段階的に成形し、フランジ部をウエブ部と直
角になすもので、不適当な加工により中間製品が
部分的に厚み変化を生じたり、製品に疵が生じる
のを防止するものである。 The present invention uses rolling rolls arranged parallel to each other and at least one of which is rotated by a drive device to form an intermediate material having the above-mentioned cross section from a rolled material such as a billet by groove rolling. In order to reduce the difference in roll circumferential speed at the flange, the flange is made straight like the web. Furthermore, the present invention cold rolls a channel steel having flanges parallel to each other and a flat web part perpendicular to the flange from the intermediate product, and the austenitic stainless steel that is the workpiece is cold rolled. Considering that it is difficult to obtain the desired amount of processing in one pass, the number of passes using cold rolls arranged parallel to each other is set at least two passes, and the number of passes is set to be at least two passes, similar to the web. A linear flange part is formed in stages to make the flange part perpendicular to the web part, which prevents partial thickness changes in the intermediate product or defects in the product due to improper processing. It is something.
また、熱間孔型圧延加工において中間製品のフ
ランジ部をウエブ部と直線状としたのは、圧延時
フランジ部におけるロール周速差を小さくし、フ
ランジ部に焼付が発生するのを防止するためであ
る。 In addition, the reason why the flange part of the intermediate product is made straight with the web part in the hot hole rolling process is to reduce the difference in roll circumferential speed at the flange part during rolling and prevent seizure from occurring at the flange part. It is.
さらに中間製品のフランジ部とウエブ部とが連
結する隅角部に相当する箇所にほぼ直角な突出部
を形成したのは、冷間成形においては肉の張り出
しが少なく成形が困難であるためであり、また突
出部の裏面側に曲率半径がフランジ部の板厚の２
倍以上の凹部を形成したのは、これ以下では、冷
間ロール加工においてフランジ部をウエブ部に対
して直角に加工する時に、成形初期に局部的に加
工硬化が生じ、良好な隅角部を得られないためで
ある。 Furthermore, the reason why a nearly right-angled protrusion was formed at a location corresponding to the corner where the flange and web part of the intermediate product are connected is because cold forming is difficult because there is little protrusion of the meat. , and the radius of curvature on the back side of the protrusion is 2 times the plate thickness of the flange.
The reason for the formation of concave portions more than double the size is that if the flange portion is processed perpendicularly to the web portion during cold roll processing, local work hardening occurs in the initial stage of forming, and a good corner portion is not formed. This is because they cannot be obtained.
また、冷間ロール加工において、必要に応じて
冷間ロールの前後にピンチローラを設けるもの
である。これは中間製品の噛み込みを改善した
り、成形ローラのスリツプを防止するものであ
る。 Additionally, in cold roll processing, pinch rollers are provided before and after the cold roll as necessary. This improves the biting of intermediate products and prevents the forming roller from slipping.
以下に本発明をその一実施例に基づいて説明す
る。 The present invention will be explained below based on one embodiment thereof.
本発明は、はじめに互いに平行に配設され、少
なくとも一方が駆動装置によつて回転させられる
所定の孔型を形成した複数組の圧延ローラを用い
て、ビレツトから中間製品を成形するものであ
る。１はビレツトで、２は一対のフランジ部３お
よびウエブ部４が直線状で、かつフランジ部３と
ウエブ部４とが連結する隅角部５に相当する箇所
に直角な突出部６と、突出部６の裏面側に凹部７
を形成した中間製品である。 The present invention involves forming an intermediate product from a billet by first using a plurality of rolling roller sets having predetermined groove shapes, which are arranged parallel to each other and at least one of which is rotated by a drive device. 1 is a billet, 2 is a pair of flange portions 3 and a web portion 4 that are linear, and has a protruding portion 6 that is perpendicular to a portion corresponding to a corner portion 5 where the flange portion 3 and the web portion 4 are connected; Concave portion 7 on the back side of portion 6
It is an intermediate product that has been formed.
第１図は、前記の中間製品２を成形する互いに
平行に配設され、下部が図示しない駆動装置によ
つて回転させられる所定の孔型を形成した最終圧
延ロールを示したもので、８は上ロールで、９は
駆動ローラで、１０は孔型である。 FIG. 1 shows final rolling rolls for forming the intermediate product 2, which are arranged parallel to each other and have a predetermined groove formed in their lower portions and are rotated by a drive device (not shown). In the upper roll, 9 is a driving roller and 10 is a hole.
第２図は中間製品２を冷間ロール加工するに用
いる、互いに平行に配設され、所望のロール形状
をした複数組の成形ローラを配設した概略図であ
り、１１は入側のピンチローラ、１２は出側のピ
ンチローラで、１３は上方に設けた凸型ローラ
で、１４は下方に設けた凹型ローラである。 FIG. 2 is a schematic diagram showing a plurality of sets of forming rollers arranged parallel to each other and having a desired roll shape, which are used to cold roll the intermediate product 2, and 11 is a pinch roller on the entry side. , 12 is a pinch roller on the exit side, 13 is a convex roller provided on the upper side, and 14 is a concave roller provided on the lower side.
そして、はじめに断面が50角、長さ1000mmのビ
レツト１を1050℃に加熱し、ついでビレツト１を
図示しないローラで圧延ローラまで移送し、ビレ
ツト１を順次加工し、フランジ部３に焼付が発生
することなくフランジ部３およびウエブ部４の肉
厚が製品寸法と同一の厚さで、一対のフランジ部
３およびウエブ部４が直線状で、かつフランジ部
３とウエブ部４とが連結する隅角部５に相当する
箇所に直角な突出部６を形成し、かつ突出部６の
裏面側に曲率半径がフランジ部３の板厚の２倍以
上の凹部７を形成した中間製品２を製造した。
（第１工程）
ついで、前記工程で成形した中間製品２をピン
チローラ１１で挟持し、上、下に配設した凸型ロ
ーラ１３と、凹型ローラ１４間に噛み込ませて、
フランジ部３を段階的に冷間成形し、厚み変化を
生じることなくウエブ部４に対して直角となし互
いに平行なフランジ部３を有する溝形鋼を製造し
た。（第２工程）
本発明の第１工程では、所定温度に加熱された
圧延素材を孔型圧延する際に、一対のフランジ部
およびウエブ部の上下辺が、直線状でかつ第１図
に示すように圧延ロール軸と平行な状態で圧延さ
れるため、圧延素材と圧延ロールの間の相対すべ
りが小さくなり、オーステナイト系ステンレス鋼
のような酸化スケールの発生が少なく、焼付きを
起こしやすい鋼を圧延素材としても、焼付き不良
を発生する心配がない。 First, a billet 1 with a cross section of 50 squares and a length of 1000 mm is heated to 1050°C, and then the billet 1 is transferred to a rolling roller by a roller (not shown), and the billet 1 is sequentially processed, causing seizure to occur on the flange portion 3. The wall thickness of the flange part 3 and the web part 4 is the same as the product dimensions without any problem, the pair of flange part 3 and the web part 4 are straight, and the angle at which the flange part 3 and the web part 4 are connected is An intermediate product 2 was manufactured in which a right-angled protrusion 6 was formed at a location corresponding to the part 5, and a recess 7 having a radius of curvature twice or more the thickness of the flange part 3 was formed on the back side of the protrusion 6.
(First step) Next, the intermediate product 2 formed in the above step is held between pinch rollers 11, and is caught between convex rollers 13 and concave rollers 14 disposed on the upper and lower sides,
The flange portions 3 were cold-formed in stages to produce a channel steel having flange portions 3 perpendicular to the web portion 4 and parallel to each other without causing any thickness change. (Second Step) In the first step of the present invention, when the rolled material heated to a predetermined temperature is groove-rolled, the upper and lower sides of the pair of flange portions and the web portion are linear and as shown in FIG. Because it is rolled parallel to the rolling roll axis, the relative slip between the rolling material and the rolling roll is reduced, making it possible to use steels like austenitic stainless steels, which have less oxidation scale and are prone to seizure. Even when used as a rolled material, there is no risk of seizure defects.
また、本発明の第２工程では、第１工程にて目
的とする板厚に成形されているため、高圧下して
板厚を薄くするる必要がないことと、冷間による
成形であるため、焼付きを生じることなく成形す
ることができる。 In addition, in the second process of the present invention, since the plate is formed to the desired thickness in the first process, there is no need to reduce the plate thickness by applying high pressure, and since the plate is formed by cold forming. , it can be molded without causing seizure.
さらに、第２工程は冷間成形であるため、寸法
精度良く製造できるとともに、加工硬化による強
度向上が期待でき、熱間成形のように成形後の冷
却時に形状で変化して矯正を必要とする心配もな
く、表面性状の優れた溝形鋼が得られる。 Furthermore, since the second step is cold forming, it is possible to manufacture products with high dimensional accuracy and improve strength through work hardening, unlike hot forming, which changes shape during cooling after forming and requires correction. You can obtain channel steel with excellent surface quality without any worries.
上述のように、本発明は熱間孔型圧延加工にお
いて横断面が直線状の中間製品を製造することに
よつて、オーステナイト系ステンレス鋼のように
変形能が悪く、かつ非常に焼付きが発生し易い鋼
においても表面疵が発生することなく、熱間圧延
加工ができ、かつ冷間ロール加工においても凸型
ローラと、凹型ローラを組合わせて用いることに
より中間製品に厚み変化を与えることなく平行な
フランジ部を有する溝型鋼を製造でき、従来のア
ングルを溶接して溝型鋼としたものに比べて大幅
に安価に製造し得るものである。 As mentioned above, the present invention produces an intermediate product with a straight cross section in hot hole rolling process, so that it has poor deformability like austenitic stainless steel and is highly prone to seizure. Even easily rolled steel can be hot-rolled without surface flaws, and even during cold-rolling, the combination of convex and concave rollers allows for no thickness changes to the intermediate product. It is possible to manufacture a channel steel having parallel flange portions, and it can be manufactured at a significantly lower cost than conventional channel steel made by welding angles.
さらに、通常、普通鋼を素材として孔型圧延法
により溝型鋼を製造する場合、仕上孔型では肉の
張り出しを良くするため、フランジ部に側圧をか
けるのが一般的であるが、この側圧によりフラン
ジ部にかじりが発生し易くなり、これを防止する
ため、通常フランジ部に若干テーパを付けて圧延
しており、上記圧延法により製造された溝型鋼の
フランジ部にはテーパがそのまま残つているもの
である。これに対して本発明法では、フランジ部
をウエブ部と直線状としたものであり、フランジ
部にかじりが発生する心配がなく、従来法のよう
にフランジ部にテーパを付ける必要がないもので
あり、このように本発明法は高い実用性を有する
ものである。 Furthermore, when producing channel steel using the groove rolling method using ordinary steel as a raw material, it is common to apply lateral pressure to the flange part in order to improve the overhang of the material in the finishing hole die. Galling tends to occur in the flange, and to prevent this, the flange is usually rolled with a slight taper, and the taper remains in the flange of channel steel manufactured by the above rolling method. It is something. On the other hand, in the method of the present invention, the flange part is in a straight line with the web part, so there is no fear of galling in the flange part, and there is no need to taper the flange part as in the conventional method. As described above, the method of the present invention has high practicality.
第１図は最終圧延ロール形状を示したもので、
第２図は冷間ロール加工に用いロールおよびピン
チローラを示した概略図で、第３図は冷間ロール
加工に用いる凸型ローラと凹型ローラ形状を示し
たものである。第４図はビレツトで、第５図は中
間製品の横断面を示したものである。
１：ビレツト、２：中間製品、３：フランジ
部、４：ウエブ部、５：隅角部、６：突出部、
７：凹部、８：上ロール、９：下ロール、１０：
孔型、１１，１２：ピンチローラ、１３：凸型ロ
ーラ、１４：凹型ローラ。
Figure 1 shows the final rolling roll shape.
FIG. 2 is a schematic diagram showing a roll and a pinch roller used in cold rolling, and FIG. 3 is a diagram showing the shapes of a convex roller and a concave roller used in cold rolling. Figure 4 shows the billet, and Figure 5 shows the cross section of the intermediate product. 1: Billet, 2: Intermediate product, 3: Flange part, 4: Web part, 5: Corner part, 6: Projection part,
7: recess, 8: upper roll, 9: lower roll, 10:
Hole type, 11, 12: pinch roller, 13: convex roller, 14: concave roller.
Claims (1)
平坦なウエブ部の両端に該ウエブ部に垂直かつ互
いに平行となるようフランジ部を起立せしめたオ
ーステナイト系ステンレス鋼の溝形鋼の製造にお
いて、 互いに平行に配設され、少なくとも一方が駆動
装置によつて回転させられる所定の孔型を形成し
た圧延ロールでもつて、所定の温度に加熱された
圧延素材に圧延加工を施し、一対のフランジ部お
よびウエブ部が直線状で、かつフランジ部とウエ
ブ部とが連結する隅角部に相当する箇所にほぼ直
角な突出部を有し、前記突出部の裏面側に曲率半
径がフランジ部の板厚の２倍以上の凹部を有し、
フランジ部およびウエブ部の肉厚が製品寸法とほ
ぼ同一の厚さである中間製品を成形する第１工程
と、 互いに平行に配設された複数組の冷間成形ロー
ルでもつて、前記中間製品のウエブと直線状の一
対のフランジ部を少なくとも２パス以上冷間成形
する第２工程とからなることを特徴とする溝形鋼
の製造方法。[Scope of Claims] 1. A groove-shaped austenitic stainless steel in which flanges are erected at both ends of a linear flat web portion so as to be perpendicular to the web portion and parallel to each other in a cross section perpendicular to the longitudinal direction. In the production of steel, rolling is performed on a rolled material heated to a predetermined temperature using rolling rolls arranged parallel to each other and having a predetermined hole shape, at least one of which is rotated by a drive device, A pair of flange portions and a web portion are linear, and have a protruding portion that is substantially perpendicular to a corner portion where the flange portion and the web portion are connected, and the radius of curvature is equal to the flange on the back side of the protruding portion. It has a recess that is more than twice the thickness of the part,
A first step of forming an intermediate product in which the wall thickness of the flange portion and the web portion is approximately the same as the product dimensions, and a plurality of sets of cold forming rolls arranged parallel to each other, A method for manufacturing channel steel, comprising a second step of cold-forming a web and a pair of linear flange portions for at least two passes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10723384A JPS60250803A (en) | 1984-05-25 | 1984-05-25 | Production of channel steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10723384A JPS60250803A (en) | 1984-05-25 | 1984-05-25 | Production of channel steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60250803A JPS60250803A (en) | 1985-12-11 |
| JPH0426921B2 true JPH0426921B2 (en) | 1992-05-08 |
Family
ID=14453859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10723384A Granted JPS60250803A (en) | 1984-05-25 | 1984-05-25 | Production of channel steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60250803A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111618140A (en) * | 2020-05-22 | 2020-09-04 | 安徽省繁昌县皖南阀门铸造有限公司 | Flange forming machine capable of being widely used |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU86625A1 (en) * | 1986-10-09 | 1988-05-03 | ||
| JPH0215803A (en) * | 1988-06-30 | 1990-01-19 | Aichi Steel Works Ltd | Manufacture of channel steel |
| KR20020066101A (en) * | 2001-02-09 | 2002-08-14 | 주식회사 유진서스뱅크 | Device bending for stainless steel plate |
-
1984
- 1984-05-25 JP JP10723384A patent/JPS60250803A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111618140A (en) * | 2020-05-22 | 2020-09-04 | 安徽省繁昌县皖南阀门铸造有限公司 | Flange forming machine capable of being widely used |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60250803A (en) | 1985-12-11 |
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