JPH08215920A - Method for cutting-off pipe material and its manufacture - Google Patents
Method for cutting-off pipe material and its manufactureInfo
- Publication number
- JPH08215920A JPH08215920A JP3081795A JP3081795A JPH08215920A JP H08215920 A JPH08215920 A JP H08215920A JP 3081795 A JP3081795 A JP 3081795A JP 3081795 A JP3081795 A JP 3081795A JP H08215920 A JPH08215920 A JP H08215920A
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- pipe material
- pipe
- cutter
- 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.)
- Granted
Links
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
- Sawing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、管材の切断方法とその
製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting a pipe material and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】例えば、上下複数段の棚板を有するラッ
クの支柱や建設資材等においては、電縫管等の管材が広
く利用されている。この管材は、帯状素材をロール成形
機にかけてロール成形することにより製造される。な
お、ラックの支柱として用いられるものは一般に角パイ
プである。2. Description of the Related Art For example, pipe materials such as electric resistance welded pipes are widely used for supporting columns of racks having a plurality of upper and lower shelves and construction materials. This pipe material is manufactured by roll-forming a strip-shaped material by using a roll-forming machine. Incidentally, what is used as the support of the rack is generally a square pipe.
【０００３】管材を所定長さに切断する方法の一つとし
て、プレスカッタによるものがある。この方法は、図８
に示すように管材Ｐに対し、その長手方向と直交する板
状で且つ倒立三角形状の刃部を有したカッタＣにより、
ギロチン状に断ち切るものである。なお、管材Ｐが正方
形状角パイプであり、且つ電縫管である場合、管材は、
その切断時において電縫部（長手方向の継ぎ目を溶接し
た部分）Ｌとされる頂角部を上方へ向けるかたちで対辺
垂直状態に保持されるのが普通である。また、カッタＣ
は、刃部の頂部が電縫部Ｌと一致するようになされる。As one of the methods of cutting a pipe material into a predetermined length, there is a press cutter. This method is shown in FIG.
As shown in FIG. 5, a cutter C having a plate-shaped and inverted triangular blade portion orthogonal to the longitudinal direction of the pipe material P
It is cut into guillotine. When the pipe material P is a square square pipe and is an electric resistance welded pipe, the pipe material is
At the time of cutting, it is usually held in a state in which the opposite side is vertical with the apex angle portion serving as the electric resistance portion (the portion where the seam in the longitudinal direction is welded) L facing upward. Also, the cutter C
Is designed so that the top of the blade matches the electric sewn portion L.
【０００４】このような場合にあって、この種カッタプ
レスではカッタＣの肉厚と略同厚の切断屑Ｄが発生す
る。この切断屑Ｄは、管材Ｐの切断過程（即ち、切断屑
Ｄの発生過程）において、二点鎖線で示すように管材Ｐ
の左右へ向けられる頂角部が二つ折り状に折り返され、
局部的な塊状となる状態を経て切り落とされるようにな
る。In such a case, a cutting dust D having a thickness substantially the same as the thickness of the cutter C is generated in this type of cutter press. The cutting waste D is formed by the pipe material P as indicated by the chain double-dashed line in the cutting process of the pipe material P (that is, the generation process of the cutting waste D).
The apex angle part that is directed to the left and right of is folded back in two,
It will be cut off after undergoing a local lump form.
【０００５】[0005]
【発明が解決しようとする課題】上記したように切断屑
Ｄに発生する塊状の部分（左右の頂角部が変形した部
分）は、高剛性部Ｂであり、従ってこの高剛性部Ｂがカ
ッタＣに繰り返し衝突することにより、カッタＣの局所
（Ｘ部参照）が急速な磨耗を起こしたり、破損したりし
易くなる。そのため、カッタプレスに対するメンテナン
スを比較的頻繁に必要とし、ランニングコストの高騰化
を招来していた。またメンテナンスの都度、カッタプレ
スを停止させる必要があるため、稼働効率、即ち、管材
Ｐとしての生産能率を低下させることに繋がっていた。As described above, the lump-like portion (the portion in which the right and left apex portions are deformed) generated in the cutting waste D is the high-rigidity portion B. Therefore, the high-rigidity portion B is the cutter. By repeatedly colliding with C, the local portion of the cutter C (see X portion) is likely to be rapidly worn or damaged. Therefore, maintenance of the cutter press is required relatively frequently, resulting in an increase in running cost. In addition, since it is necessary to stop the cutter press each time maintenance is performed, this leads to a decrease in operating efficiency, that is, the production efficiency of the pipe material P.
【０００６】本発明は上記事情に鑑みてなされたもので
あって、カッタプレスにおけるカッタの磨耗や破損を可
及的に防止できるようにして、従来欠点の解消を図れる
ようにした管材の切断方法とその製造方法とを提供する
ことを目的とする。The present invention has been made in view of the above circumstances, and is a method of cutting a pipe material which can prevent the wear and damage of the cutter in the cutter press as much as possible, thereby eliminating the conventional defects. And its manufacturing method.
【０００７】[0007]
【課題を解決するための手段】本発明では、上記目的を
達成するために、次の技術的手段を講じた。即ち、本発
明に係る管材の切断方法は、管材をプレスカッタにより
切断する方法において、管材には、カッタによる切断過
程で発生する切断屑が塊状となってカッタへ衝突するよ
うになる予想部に対応して、予め管肉を貫通させた除肉
部を形成し、その後切断することを特徴としている。In order to achieve the above object, the present invention takes the following technical means. That is, the method of cutting a pipe material according to the present invention is a method of cutting a pipe material with a press cutter, in which the cutting waste generated in the cutting process by the cutter becomes a lump and is expected to collide with the cutter. Correspondingly, it is characterized in that a meat-removed portion in which the pipe meat is penetrated is formed in advance and then cut.
【０００８】前記管材を角パイプとし、且つ該管材を対
辺垂直状態で保持しつつその上方側頂角部から下方側へ
切断を行うようにする場合において、前記除肉部は、管
材において左右へ向けられる頂角部を除去するかたちで
設けるようにするのが好適である。一方、本発明に係る
管材の製造方法は、帯状素材の供給部と、該帯状素材の
所定箇所に孔、切起こし、凹凸等を形成させる加工部
と、該帯状素材を管形状に成形するロール成形部と、成
形後の継ぎ目を溶接する溶接部と、溶接後の管材を所定
長さに切断する切断部とを経て管材を製造する方法にお
いて、前記加工部では、前記した除肉部を形成させて切
断部での切断に準備させることを特徴としている。In the case where the pipe material is a square pipe, and the pipe material is cut vertically from the upper apex angle portion thereof while being held in a state where the pipe material is perpendicular to the opposite side, the meat removal portion is left and right in the pipe material. It is preferred that the directed apex be provided such that it is removed. On the other hand, the method for producing a pipe material according to the present invention includes a supply unit for a strip-shaped material, a processing unit for forming holes, cut and raised parts, irregularities, etc. at a predetermined position of the strip-shaped material, and a roll for forming the strip-shaped material into a tubular shape. In the method for producing a pipe material through a forming portion, a weld portion for welding a seam after forming, and a cutting portion for cutting the pipe material after welding into a predetermined length, in the processing portion, the above-described thinned portion is formed. It is characterized in that it is prepared to be cut by the cutting section.
【０００９】[0009]
【作用】管材には、その切断に先立って、所定箇所に管
肉を貫通させた除肉部（開口）が形成されている。この
除肉部は、管材の切断過程において切断屑に発生する塊
状の部分に該当するように位置付けられている。すなわ
ち、切断屑として、塊状の高剛性部は発生しないもので
ある。The pipe material is formed with a thinned portion (opening) through which the pipe meat penetrates at a predetermined position prior to the cutting. The thinned portion is positioned so as to correspond to a lump-like portion generated in the cutting waste during the cutting process of the pipe material. That is, the block-like high-rigidity portion does not occur as cutting waste.
【００１０】[0010]
【実施例】以下、本発明の実施例を図面に基づき説明す
る。管材Ｐ（以下、電縫管である場合について説明す
る）の製造ラインを示す図４において、１は帯状素材Ｗ
の供給部であってアンコイラー２、ローラレベラー３、
ロールフィーダー４を有しており、また５は帯状素材Ｗ
の所定箇所に孔、切起こし、凹凸等を形成させる加工部
であってプレス機により構成されている。６は帯状素材
Ｗを管形状に成形するロール成形部であって複数段にわ
たる成形ロールが列設状に配置されて成る。７は成形に
よって管形状とした後に、その長手方向に沿って生じた
継ぎ目を溶接する溶接部である。Embodiments of the present invention will be described below with reference to the drawings. In FIG. 4, which shows a manufacturing line of a pipe material P (hereinafter, the case of an electric resistance welded pipe), 1 is a band-shaped material W.
The uncoiler 2, roller leveler 3,
It has a roll feeder 4 and 5 is a strip material W
It is a processing part for forming holes, cut and raised parts, irregularities, etc. at a predetermined position, and is constituted by a press machine. Reference numeral 6 is a roll forming section for forming the strip-shaped material W into a tube shape, and is formed by arranging a plurality of forming rolls in a row. Reference numeral 7 is a welded portion for welding a seam formed along the longitudinal direction of the pipe after forming it into a tubular shape.
【００１１】そして、１０は溶接部７を経た後の管材Ｐ
を所定長さおきに切断するための切断部であってプレス
カッタにより構成されている。この切断部１０で切断さ
れた管材Ｐは、それぞれコンベヤ等の搬出部１１により
適宜搬出されるようになっている。図５は切断部１０に
用いられるプレスカッタを示したもので、このプレスカ
ッタは、走行切断機となされ、上下のガイドレール１
２，１３に沿って台車１４が管材Ｐと同速で走行しつ
つ、この台車１４に設けられたカッタ部１５により管材
Ｐ（図５では図示略）を切断する。カッタ部１５は、図
６に示すように所定間隔で設けられたカッタ枠１８，１
９間を、その相互間隔と略同厚のカッタ２０が上下動す
る構造となっている。２１は管材Ｐを通す通孔であっ
て、正方形状角パイプとされる管材Ｐを対辺垂直状態で
通過できるようになっており、その入口側の開口縁部に
は額縁状の面取り部２２が施してある。Numeral 10 indicates a pipe material P after passing through the welded portion 7.
Is a cutting section for cutting the sheet at predetermined intervals and is constituted by a press cutter. The pipe material P cut by the cutting unit 10 is appropriately carried out by a carrying-out unit 11 such as a conveyor. FIG. 5 shows a press cutter used for the cutting unit 10. This press cutter is used as a traveling cutting machine, and the upper and lower guide rails 1 are provided.
While the truck 14 travels at the same speed as the pipe P along the lines 2 and 13, the cutter 15 provided on the truck 14 cuts the pipe P (not shown in FIG. 5). The cutter unit 15 includes cutter frames 18 and 1 provided at predetermined intervals as shown in FIG.
A cutter 20 having substantially the same thickness as the mutual distance between 9 is vertically moved. Reference numeral 21 denotes a through hole through which the pipe material P is passed, so that the pipe material P, which is a square-shaped square pipe, can pass in a state where the opposite side is vertical, and a frame-shaped chamfered portion 22 is provided at the opening edge portion on the inlet side. It has been given.
【００１２】図１乃至図３は、本発明に係る管材Ｐの切
断方法を示したもので、この管材Ｐには、上記切断部１
０による切断に先立ち、予め除肉部２５を設けるように
してある。管材Ｐは、図３に二点鎖線で示すように帯状
素材Ｗの幅方向両側部が上記ロール成形部６によって上
側へ折曲されて正方形状角パイプとされ（図中の一点鎖
線は折れ線部を示す）、またその上方側頂角部に上記溶
接部７による電縫部Ｌが形成されるようになるが、上記
除肉部２５は、図１及び図２に示すように管材Ｐにおい
て左右へ向けられる頂角部（隅角部）の管肉を貫通させ
るかたちで設けられている。1 to 3 show a method of cutting a pipe material P according to the present invention.
Prior to the cutting by 0, the meat removal portion 25 is provided in advance. As shown by the alternate long and two short dashes line in FIG. 3, both ends of the strip-shaped material W in the width direction are bent upward by the roll forming section 6 to form a square pipe (the one-dot chain line in the figure is a broken line portion). The electric welded portion L is formed by the welded portion 7 at the upper apex portion thereof, but the thinned portion 25 is left and right in the pipe material P as shown in FIGS. 1 and 2. It is provided in such a way as to penetrate the tube meat of the apex (corner) to be directed.
【００１３】この除肉部２５の幅寸法（管材Ｐの長手方
向に沿った寸法）は、前記切断部１０におけるカッタ２
０の肉厚と略同じとなるように形成されている。この除
肉部２５は、前記した管材Ｐの製造ライン中（図５参
照）の加工部５により、帯状素材Ｗに対してプレス加工
等によって設けることができる。すなわち、図３におい
て、除肉部２５は帯状素材Ｗの幅方向両側寄りとなる折
れ線をそれぞれ跨ぐかたちで開口形成される。The width dimension of this thinned portion 25 (the dimension along the longitudinal direction of the pipe material P) is the cutter 2 in the cutting portion 10.
It is formed to have a thickness substantially equal to 0. The thinned portion 25 can be provided by press working or the like on the band-shaped material W by the processing portion 5 in the above-described production line of the pipe material P (see FIG. 5). That is, in FIG. 3, the thinned portion 25 is formed so as to open across the fold lines of the strip-shaped material W that are located on both sides in the width direction.
【００１４】各除肉部２５の長さ（帯状素材Ｗの幅方向
寸法）は、カッタ２０による切断過程で、切断屑（図８
のＤ参照）に対して発生が予想される高剛性部Ｂに対応
すべく設定する。但し、帯状素材Ｗがロール成形時に折
曲変形されるうえで支障（亀裂等の発生）の生じない程
度に留めておく必要がある。このように管材Ｐに除肉部
２５が設けられているため、上記切断部１０において、
カッタ２０が切断進行する（落下する）のに伴って塊状
の高剛性部Ｂが形成されることがなく、従ってカッタ２
０の局所が急速な磨耗を起こしたり、破損したりするこ
とが防止されるものである。The length of each thinned portion 25 (dimension in the width direction of the strip-shaped material W) is determined by cutting shavings (see FIG. 8).
It is set so as to correspond to the high rigidity portion B which is expected to occur. However, it is necessary to keep the band-shaped material W to such an extent that it does not cause an obstacle (generation of cracks or the like) when it is bent and deformed during roll forming. In this way, since the pipe material P is provided with the thinned portion 25, in the cutting portion 10,
As the cutter 20 progresses in cutting (falls), the block-shaped high-rigidity portion B is not formed, and therefore the cutter 2
This prevents local wear of 0 from causing rapid wear or damage.
【００１５】ところで、本発明において管材Ｐは、前記
実施例に示したような正方形状角パイプとすることが限
定されるものではなく、図７に示すように長方形状角パ
イプとしてもよい。また、図示は省略するが多角形状の
パイプや丸パイプでもよい。そして、これらの各場合に
応じて切断部１０におけるカッタ２０の形状や、除肉部
２５の形状、形成位置等が適宜変更されることは勿論で
ある。In the present invention, the pipe material P is not limited to the square square pipe as shown in the above embodiment, but may be a rectangular square pipe as shown in FIG. Although not shown, a polygonal pipe or a round pipe may be used. And, it goes without saying that the shape of the cutter 20 in the cutting portion 10, the shape of the thinned portion 25, the forming position, etc. are appropriately changed according to each of these cases.
【００１６】また、前記したように管材Ｐは電縫管でな
いもの（引き抜き法、押し出し法又は穿孔法等によって
成形されたもの）でもよく、従ってカッタ２０の刃部頂
部を電縫部Ｌに一致させるという事項についても、限定
されるものではない。勿論、管材Ｐの材質も何ら限定さ
れない。図４に示した製造ラインの細部構成や、図５及
び図６に示した切断部１０の細部構造等は何ら限定され
るものではない。Further, as described above, the pipe material P may not be an electric resistance welded pipe (formed by a drawing method, an extrusion method, a perforation method or the like). Therefore, the top of the blade portion of the cutter 20 is aligned with the electric resistance portion L. The matter is also not limited. Of course, the material of the pipe material P is not limited at all. The detailed configuration of the manufacturing line shown in FIG. 4 and the detailed structure of the cutting portion 10 shown in FIGS. 5 and 6 are not limited at all.
【００１７】[0017]
【発明の効果】本発明は、上述の構成を具備するもので
あって、管材に対し、その切断に先立って、所定箇所に
管肉を貫通させた除肉部（開口）が形成されている。こ
の除肉部は、カッタによる切断過程において切断屑が塊
状になる部分に該当するようになっている。すなわち、
切断屑として、塊状の高剛性部分は発生しないものとな
るため、カッタの局所が急速な磨耗を起こしたり、破損
したりすることが防止され、カッタプレスのメンテナン
スを少なくできる。このようなことにより、製造コスト
の低廉化を図ることができる。According to the present invention, which has the above-described structure, a cut-out portion (opening) in which the pipe meat is penetrated is formed at a predetermined position on the pipe material prior to cutting the pipe material. . The thinned portion corresponds to a portion where cutting chips are aggregated in the cutting process by the cutter. That is,
Since no massive high-rigidity portion is generated as cutting waste, it is possible to prevent local wear of the cutter from being rapidly worn or damaged, and maintenance of the cutter press can be reduced. As a result, the manufacturing cost can be reduced.
【００１８】また、メンテナンスを少なくできることに
伴ってカッタプレスの停止回数及び停止時間も減少化で
き、その稼働効率、即ち、管材としての生産能率を高め
ることができる。Further, the number of stoppages and the stoppage time of the cutter press can be reduced along with the reduction of maintenance, and the operation efficiency thereof, that is, the production efficiency as a pipe material can be increased.
【図１】本発明に係る切断方法の実施状況を示す正面図
である。FIG. 1 is a front view showing an implementation situation of a cutting method according to the present invention.
【図２】本発明の切断方法に用いられる管材を示す斜視
図である。FIG. 2 is a perspective view showing a pipe material used in the cutting method of the present invention.
【図３】図２に示す管材を成形するための帯状素材を示
す斜視図である。FIG. 3 is a perspective view showing a band-shaped material for forming the pipe material shown in FIG.
【図４】管材の製造ラインを示す側面図である。FIG. 4 is a side view showing a production line of a pipe material.
【図５】切断部に用いられるプレスカッタを示すもので
あって、（ａ）は正面図、（ｂ）は側面図である。5A and 5B are views showing a press cutter used for a cutting portion, in which FIG. 5A is a front view and FIG. 5B is a side view.
【図６】プレスカッタのカッタ部を拡大して示す斜視図
である。FIG. 6 is an enlarged perspective view showing a cutter portion of the press cutter.
【図７】長方形角パイプとされた管材に対する本発明に
係る切断方法の実施状況を示す正面図である。FIG. 7 is a front view showing an implementation state of a cutting method according to the present invention for a pipe material formed into a rectangular rectangular pipe.
【図８】従来の切断方法を示す正面図である。FIG. 8 is a front view showing a conventional cutting method.
１ 供給部 ５ 加工部 ６ ロール成形部 ７ 溶接部 １０ 切断部 ２０ カッタ ２５ 破断誘導部 ２７ 開口部 ２８ ノッチ ３０ スリット ３１ 凹部 DESCRIPTION OF SYMBOLS 1 Supply part 5 Processing part 6 Roll forming part 7 Welding part 10 Cutting part 20 Cutter 25 Break induction part 27 Opening part 28 Notch 30 Slit 31 Concave part
Claims (3)
る方法において、管材（Ｐ）には、カッタ（２０）によ
る切断過程で発生する切断屑が塊状となってカッタ（２
０）へ衝突するようになる予想部に対応して、予め管肉
を貫通させた除肉部（２５）を形成し、その後切断する
ことを特徴とする管材の切断方法。1. A method of cutting a pipe material (P) with a press cutter, wherein the pipe material (P) is formed with a mass of cutting waste generated during a cutting process by the cutter (20).
A method for cutting a pipe material, which comprises forming a thinned portion (25) in which the pipe meat is penetrated in advance corresponding to a predicted portion which will collide with 0), and then cutting.
管材（Ｐ）を対辺垂直状態で保持しつつその上方側頂角
部から下方側へ切断を行うようにする場合において、前
記除肉部（２５）は、管材（Ｐ）において左右へ向けら
れる頂角部を除去するかたちで設けるようにすることを
特徴とする請求項１記載の管材の切断方法。2. In the case where the pipe material (P) is a square pipe and the pipe material (P) is held in a state of being perpendicular to the opposite side while cutting from the upper apex portion of the pipe material downward, The method for cutting a pipe material according to claim 1, wherein the meat portion (25) is provided so as to remove a vertical corner portion of the pipe material (P) directed to the left and right.
状素材（Ｗ）の所定箇所に孔、切起こし、凹凸等を形成
させる加工部（５）と、該帯状素材（Ｗ）を管形状に成
形するロール成形部（６）と、成形後の継ぎ目を溶接す
る溶接部（７）と、溶接後の管材（Ｐ）を所定長さに切
断する切断部（１０）とを経て管材（Ｐ）を製造する方
法において、前記加工部（５）では請求項１又は請求項
２に記載の除肉部（２５）を形成させて切断部（１０）
での切断に準備させることを特徴とする管材の製造方
法。3. A band-shaped material (W) supply part (1), a processing part (5) for forming holes, cuts and raised parts, irregularities and the like at predetermined positions of the band-shaped material (W), and the band-shaped material (W). ) Is formed into a tube shape, a roll forming part (6), a welded part (7) for welding the seam after forming, and a cutting part (10) for cutting the pipe material (P) after welding into a predetermined length. In the method of manufacturing a pipe material (P) through the above, the cut portion (10) by forming the thinned portion (25) according to claim 1 or 2 in the processing portion (5).
A method for manufacturing a pipe material, which comprises preparing for cutting at.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7030817A JP2877712B2 (en) | 1995-02-20 | 1995-02-20 | Pipe material cutting method and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7030817A JP2877712B2 (en) | 1995-02-20 | 1995-02-20 | Pipe material cutting method and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08215920A true JPH08215920A (en) | 1996-08-27 |
| JP2877712B2 JP2877712B2 (en) | 1999-03-31 |
Family
ID=12314261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7030817A Expired - Fee Related JP2877712B2 (en) | 1995-02-20 | 1995-02-20 | Pipe material cutting method and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2877712B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002263945A (en) * | 2001-03-14 | 2002-09-17 | Nisshin Steel Co Ltd | Lubricating method for press cutting |
| CN113426884A (en) * | 2021-06-29 | 2021-09-24 | 太原科技大学 | Production method and production line of large-diameter thin-wall metal pipe |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101626824B1 (en) * | 2014-09-12 | 2016-06-16 | 김상우 | Cutting press capable of simultaneously width direction and height direction cutting |
| KR101816016B1 (en) * | 2017-02-20 | 2018-01-08 | 구하경 | Frame assembley |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48101689A (en) * | 1972-04-06 | 1973-12-21 | ||
| JPS5550758U (en) * | 1978-09-27 | 1980-04-03 | ||
| JPS5638718U (en) * | 1979-08-28 | 1981-04-11 |
-
1995
- 1995-02-20 JP JP7030817A patent/JP2877712B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48101689A (en) * | 1972-04-06 | 1973-12-21 | ||
| JPS5550758U (en) * | 1978-09-27 | 1980-04-03 | ||
| JPS5638718U (en) * | 1979-08-28 | 1981-04-11 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002263945A (en) * | 2001-03-14 | 2002-09-17 | Nisshin Steel Co Ltd | Lubricating method for press cutting |
| CN113426884A (en) * | 2021-06-29 | 2021-09-24 | 太原科技大学 | Production method and production line of large-diameter thin-wall metal pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2877712B2 (en) | 1999-03-31 |
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