JPH0811251B2 - Overload prevention device in cold roll forming - Google Patents

Overload prevention device in cold roll forming

Info

Publication number
JPH0811251B2
JPH0811251B2 JP59172279A JP17227984A JPH0811251B2 JP H0811251 B2 JPH0811251 B2 JP H0811251B2 JP 59172279 A JP59172279 A JP 59172279A JP 17227984 A JP17227984 A JP 17227984A JP H0811251 B2 JPH0811251 B2 JP H0811251B2
Authority
JP
Japan
Prior art keywords
roll
forming
cold
hydraulic
rolls
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
Application number
JP59172279A
Other languages
Japanese (ja)
Other versions
JPS6149732A (en
Inventor
修 古田
重則 都築
広 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aichi Steel Corp
Original Assignee
Aichi Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aichi Steel Corp filed Critical Aichi Steel Corp
Priority to JP59172279A priority Critical patent/JPH0811251B2/en
Publication of JPS6149732A publication Critical patent/JPS6149732A/en
Publication of JPH0811251B2 publication Critical patent/JPH0811251B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Description

【発明の詳細な説明】 本発明は形鋼など、特に熱間圧延加工において厚みの
バラツキが大きな中間製品を、冷間ロール成形するにロ
ールチョックに過大な負荷がかかるのを防止する装置に
係る。
The present invention relates to a device for preventing an excessive load from being applied to a roll chock during cold roll forming of an intermediate product such as a shaped steel, especially an intermediate product having a large thickness variation in hot rolling.

本出願人は先に平行なフランジ部と平坦なウエブ部を
有する溝形鋼を製造するに、熱間圧延加工において一対
のフランジ部をそれぞれ垂線に対して外側に傾斜させ、
かつウエブ部を凸状の形状とし、その横断面をW形状と
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し、ついで冷間ロール
成形によって前記中間製品の凸部形状のウエブ部を平坦
にする製造法を出願した。
The applicant previously manufactured a channel steel having a parallel flange portion and a flat web portion, in a hot rolling process, a pair of flange portions are each inclined outward with respect to a perpendicular line,
In addition, the web portion is formed into a convex shape, the cross section thereof is formed into a W shape, and an intermediate product in which the thickness of the flange portion and the web portion is almost the same as the product dimension is formed. We applied for a manufacturing method that flattens the convex-shaped web portion of the intermediate product.

上記冷間ロール成形においては、凸部形状のウエブ部
を平坦にするに、予めロール間隙を溝形鋼の製品厚と同
一の隙間とし、冷間成形ロール軸を支承するロールチョ
ックに対して、ねじ圧下機構でもって、凸部形状のウエ
ブ部を平坦にする圧下力と、ウエブ部を平坦にする時に
生じる長手方向の曲がりに対抗する力との合力を付与し
て冷間ロール成形するものである。
In the cold roll forming, in order to flatten the convex-shaped web portion, the roll gap is previously set to the same gap as the product thickness of the channel steel, and the roll chock supporting the cold forming roll shaft is screwed. The cold roll forming is performed by applying a resultant force of a pressing mechanism that flattens the convex web portion and a force that opposes the bending in the longitudinal direction that occurs when the web portion is flattened. .

しかしながら、熱間圧延された横断面がW形状の中間
製品のウエブ部の肉厚は若干のバラツキを有するもので
あり、肉厚の大きなウエブ部を冷間ロール成形時にロー
ル間隙は拡大されるが、ロール軸を支承するロールチョ
ックには前記のようにねじ圧下機構によって目標厚みに
対応するロール隙間が付与されており、目標より肉厚が
大きな材料がロール隙間に入ることよってロールチョッ
ク部およびロールチョックを支持するスタンドに大きな
負荷が加わり、ねじ圧下機構やロールチョックを構成す
るベアリングが破損するという問題があった。
However, the thickness of the web portion of the intermediate product having a W-shaped cross section that has been hot rolled has a slight variation, and the roll gap is enlarged during cold roll forming of the web portion having a large thickness. As described above, the roll chock supporting the roll shaft is provided with a roll gap corresponding to the target thickness by the screw reduction mechanism, and the material having a larger wall thickness than the target enters the roll gap, thereby supporting the roll chock portion and the roll chock. There is a problem that a large load is applied to the stand, and the bearings forming the screw rolling mechanism and the roll chock are damaged.

これに対して、ウエブ部の厚み変動により過大な荷重
が生じた場合、厚み変動に対抗し得るようにスタンドや
ロールの剛性を高める方法あるいはこれら荷重を吸収す
るため、荷重を検出するロードセルと、電気−油圧サー
ボ系からなる圧下機構等を設ける方法があるが、前者に
おいては設備が大型化し、かつ後者においては設備が高
価なものになるなどウエブ部の厚み変動に対応し得る好
適な装置はなかった。
On the other hand, when an excessive load is generated due to the thickness variation of the web portion, a method of increasing the rigidity of the stand or roll so as to counter the thickness variation or to absorb these loads, a load cell for detecting the load, There is a method of providing a reduction mechanism or the like composed of an electro-hydraulic servo system, but in the former case, the equipment becomes large, and in the latter case, the equipment becomes expensive, so that a suitable apparatus capable of coping with the thickness variation of the web part is There wasn't.

本発明は従来技術の前記欠点に鑑みてなしたもので、
溝形鋼のウエブ部の厚みのバラツキ、材料の噛み込み、
噛み抜け時など過大な荷重が発生した場合にも、これを
安価な方法で吸収するものであり、したがって本発明装
置においては圧延機スタンドの剛性の小さいものでも対
応し得るものである。
The present invention has been made in view of the above drawbacks of the prior art,
Fluctuations in the thickness of the web of channel steel, biting of material,
Even if an excessive load is generated, such as when biting through, it absorbs the load by an inexpensive method, and therefore, in the device of the present invention, the rolling mill stand having a low rigidity can be used.

本発明は互いに平行に配設され、少なくとも一方が駆
動装置によって回転させられる複数組の冷間成形ロール
と、この冷間成形ロールの両端に形成されたロール軸
と、該ロール軸を回転自在に支承する内部にローラベア
リングを有するロールチョックと、冷間成形ロールのう
ち上ロールを支承するロールチョックに押圧力を与えて
ロール間隔を位置決めするねじ圧下機構と、さらにウエ
ブ部の厚み変動に対応し得るようにロール間隔制御用の
電気−油圧サーボを含まない油圧駆動の保持機構を採用
し、かつ、この保持機構の油圧シリンダを作動させる油
と閉ループを形成し、定常時には油圧回路内の油圧を常
に一定に保持して所定押圧力を被加工材に付加するとと
もに、被加工材が所定肉厚よりも大きく成形時に過負荷
がかかりやすい時には油圧を一定に保持するように所定
以上の油圧変化を吸収するアキュムレータを設けたもの
で、例えウエブ部の肉厚に若干のバラツキを有する場合
においても油圧シリンダ内の油圧の高まりをアキュムレ
ータによって吸収でき、ロールチョックやスタンドに過
大な負荷が加わるのを防止し得るものである。
According to the present invention, a plurality of sets of cold forming rolls arranged in parallel with each other, at least one of which is rotated by a drive device, roll shafts formed at both ends of the cold forming rolls, and the roll shafts being rotatable. A roll chock that has a roller bearing inside, and a screw reduction mechanism that applies a pressing force to the roll chock that supports the upper roll of the cold forming rolls to position the roll gap, and to cope with fluctuations in web thickness. Adopts a hydraulically driven holding mechanism that does not include the electro-hydraulic servo for controlling the roll interval, and forms a closed loop with the oil that operates the hydraulic cylinder of this holding mechanism, so that the hydraulic pressure in the hydraulic circuit is always constant during normal operation. When the work material is larger than the predetermined thickness and is likely to be overloaded during molding, An accumulator that absorbs changes in hydraulic pressure above a certain level is provided to keep the pressure constant, and even if there is slight variation in the wall thickness of the web, the accumulator can absorb the increase in hydraulic pressure in the hydraulic cylinder. It is possible to prevent an excessive load from being applied to the roll chock or the stand.

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 described below based on an embodiment thereof.

本実施例は溝形鋼の製造において、熱間圧延加工にお
いて一対のフランジ部をそれぞれ垂線に対して外側に傾
斜させ、かつウエブ部を凸状とし、その横断面をW形状
とし、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し、この中間製品の
凸部形状のウエブ部を平坦にする冷間ロール成形につい
て述べる。
In this embodiment, in the production of channel steel, a pair of flange portions are respectively inclined outward with respect to a perpendicular line in a hot rolling process, and a web portion has a convex shape, and its cross section has a W shape. Cold roll forming will be described in which an intermediate product having a web portion whose wall thickness is almost the same as the product dimension is formed and the convex web portion of the intermediate product is flattened.

1は前記中間製品20の凸部形状のウエブ部21を平坦に
し、平行なフランジ部22と平坦なウエブ部21を有する溝
形鋼を冷間ロール成形する複数組のローラで、2は上ロ
ール、3は下ロールで、4はピンチローラで、5はロー
ラ2、3の両端に形成されたロール軸である。
Reference numeral 1 is a plurality of rollers for flattening a convex web portion 21 of the intermediate product 20 and cold-roll forming a channel steel having a parallel flange portion 22 and a flat web portion 21, and 2 is an upper roll. 3 is a lower roll, 4 is a pinch roller, and 5 is a roll shaft formed at both ends of the rollers 2 and 3.

6は前記ロール軸5を回転自在に支承する内部にロー
ラベアリングを有するロールチョックで、7は前記上ロ
ール2を支承するロールチョック6に押圧力を付与する
ねじ圧下機構で、8は前記上、下ロール2、3を支承す
るロールチョック6に押圧力を付与するロール間隔制御
用の電気−油圧サーボを含まない油圧駆動の保持機構
で、10は前記保持機構8の油圧シリンダ9内の油と閉ル
ープを形成し、油圧シリンダ9内の油圧を一定に保持す
るアキュムレータである。
Reference numeral 6 is a roll chock having a roller bearing therein for rotatably supporting the roll shaft 5, 7 is a screw reduction mechanism for applying a pressing force to the roll chock 6 for supporting the upper roll 2, and 8 is the upper and lower rolls. A hydraulically driven holding mechanism that does not include an electro-hydraulic servo for controlling the roll interval that applies a pressing force to the roll chock 6 that supports the two or three, and 10 forms a closed loop with the oil in the hydraulic cylinder 9 of the holding mechanism 8. However, the accumulator keeps the hydraulic pressure in the hydraulic cylinder 9 constant.

そして、前記熱間圧延加工において成形された断面が
W形状の中間製品20の凸部形状のウエブ部21を平坦にす
るに、予めロール間隙を溝形鋼の製品厚さと同一の隙間
とし、冷間成形ロール軸5を支承するロールチョック6
に対してはねじ圧下機構7でもって、凸部形状のウエブ
部21を平坦にする圧下力と、ウエブ部21を平坦にする時
に生じる長手方向の曲がりに対抗する力との合力を付与
し、断面がW形状の中間製品20をロール2、3間に噛み
込ませるものである。噛み込に際してロール2、3間隙
が拡大され、ロールチョック6には瞬間的に過大な負荷
がかかるが、圧下機構8の油圧シリンダ9を作動させる
油と閉ループを形成したアキキュムレータ10によって、
油圧シリンダ9内の油圧の高まりが調整されることによ
ってロールチョック6に加わった過大な負荷はアキュム
レータ10によって吸収されるものである。
Then, in order to flatten the convex web portion 21 of the intermediate product 20 having a W-shaped cross section formed in the hot rolling, the roll gap is previously made the same as the product thickness of the channel steel, and the Roll chock 6 for supporting the cold forming roll shaft 5
On the other hand, the screw reduction mechanism 7 gives a resultant force of a reduction force for flattening the convex web portion 21 and a force for opposing the bending in the longitudinal direction generated when the web portion 21 is flattened. The intermediate product 20 having a W-shaped cross section is caught between the rolls 2 and 3. The gap between the rolls 2 and 3 is enlarged during biting, and an excessive load is momentarily applied to the roll chock 6. However, due to the oil that operates the hydraulic cylinder 9 of the reduction mechanism 8 and the accumulator 10 that forms a closed loop,
The excessive load applied to the roll chock 6 by adjusting the increase in the hydraulic pressure in the hydraulic cylinder 9 is absorbed by the accumulator 10.

そして、ウエブ部21の肉厚が0.3mmほど大きな溝形鋼
の成形においては、前記と同様にロール2、3間隙が拡
大され、ロールチョック6に過大な負荷がかかるが、ロ
ールチョック6を押圧する油圧シリンダ9内の油圧の高
まりをアキュムレータ10によってロールチョック6に加
わった過大な負荷に吸収され、例えウエブ部21の肉厚が
大きな溝形鋼の冷間ロール成形においてもロールチョッ
ク6やスタンド(図示せず)破損することがないもので
ある。
When forming a channel steel having a wall portion 21 having a wall thickness of about 0.3 mm, the gap between the rolls 2 and 3 is expanded and an excessive load is applied to the roll chock 6 as described above, but the hydraulic pressure for pressing the roll chock 6 is increased. The increase in hydraulic pressure in the cylinder 9 is absorbed by the excessive load applied to the roll chock 6 by the accumulator 10, and the roll chock 6 and the stand (not shown) are formed even in the cold roll forming of channel steel having a large web portion 21. ) It should not be damaged.

上述のように、本発明は形鋼などを熱間圧延加工した
中間製品が、たとえ大きな厚みのバラツキを有する場合
においても、その中間製品を冷間ロール成形時に、ロー
ルチョックやスタンドに過大な負荷か加わることによっ
て破損することがない。かつ、従来の圧延装置に使用さ
れているロール間隔制御用の電気−油圧サーボを含む高
価な油圧駆動制御装置を必要としないため極めて高い実
用性を有するものである。
As described above, according to the present invention, even if the intermediate product obtained by hot-rolling shaped steel or the like has a large variation in thickness, when the intermediate product is cold roll-formed, an excessive load is applied to the roll chock or the stand. It will not be damaged by being added. In addition, since it does not require an expensive hydraulic drive control device including an electro-hydraulic servo for controlling a roll interval used in a conventional rolling mill, it has extremely high practicality.

【図面の簡単な説明】 第1図は冷間ロール加工に用いるロールおよびピンチロ
ーラを示した概略図で第2図は冷間ロール成形装置に本
発明の過負荷防止装置を設けた概略図である。第3図は
中間製品の側面図である。 2:上ロール、3:下ロール、5:ロール軸、6:ロールチョッ
ク、8:油圧駆動の保持機構、9:油圧シリンダ、10:アキ
ュレーター
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing rolls and pinch rollers used for cold roll processing, and FIG. 2 is a schematic view showing a cold roll forming apparatus provided with an overload prevention device of the present invention. is there. FIG. 3 is a side view of the intermediate product. 2: Upper roll, 3: Lower roll, 5: Roll axis, 6: Roll chock, 8: Hydraulic drive holding mechanism, 9: Hydraulic cylinder, 10: Acculator

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】互いに平行に配設され、かつ少なくとも一
方が回転駆動する上ロールと下ロールからなる冷間成形
ロールと、該冷間成形ロールの両端に形成されたロール
軸と、このロール軸を回転自在に支承する内部にローラ
ベアリングを有するロールチョックと、前記冷間成形ロ
ールのうち上ロールを支承するロールチョックに押圧力
を与えてロール間隔を位置決めするねじ圧下機構と、前
記上ロール又は下ロールのうち少なくとも一方のロール
に対して押圧力を付与するロール間隔制御用の電機−油
圧サーボを含まない油圧駆動の保持機構からなる複数組
のロール成形装置において、 前記保持機構の油圧シリンダとともに閉ループを形成
し、定常時には油圧回路内の油圧を常に一定に保持して
所定押圧力を被加工材に付加するとともに、被加工材が
所定肉厚よりも大きく成形時に過負荷がかかりやすい時
には油圧を一定に保持するように所定以上の油圧変化を
吸収するアキュームレータを有することを特徴とする冷
間ロール成形における過負荷防止装置。
1. A cold forming roll comprising upper and lower rolls, which are arranged parallel to each other and at least one of which is rotationally driven, a roll shaft formed at both ends of the cold forming roll, and the roll shaft. A roll chock having a roller bearing inside for rotatably supporting, and a screw reduction mechanism for positioning a roll interval by applying a pressing force to the roll chock supporting the upper roll of the cold forming rolls, and the upper roll or the lower roll. In a plurality of sets of roll forming apparatus consisting of a hydraulically driven holding mechanism that does not include a roll gap control electric machine that applies a pressing force to at least one of the rolls-a hydraulic servo, a closed loop is formed together with a hydraulic cylinder of the holding mechanism. Once formed, the hydraulic pressure in the hydraulic circuit is always kept constant during normal operation to apply a predetermined pressing force to the work material and An overload prevention device in cold roll forming, which has an accumulator that absorbs a change in hydraulic pressure above a predetermined value so as to keep the hydraulic pressure constant when the work material is thicker than a predetermined thickness and is likely to be overloaded during forming. .
JP59172279A 1984-08-18 1984-08-18 Overload prevention device in cold roll forming Expired - Lifetime JPH0811251B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59172279A JPH0811251B2 (en) 1984-08-18 1984-08-18 Overload prevention device in cold roll forming

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59172279A JPH0811251B2 (en) 1984-08-18 1984-08-18 Overload prevention device in cold roll forming

Publications (2)

Publication Number Publication Date
JPS6149732A JPS6149732A (en) 1986-03-11
JPH0811251B2 true JPH0811251B2 (en) 1996-02-07

Family

ID=15938969

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59172279A Expired - Lifetime JPH0811251B2 (en) 1984-08-18 1984-08-18 Overload prevention device in cold roll forming

Country Status (1)

Country Link
JP (1) JPH0811251B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69027786T2 (en) * 1989-12-04 1997-01-09 Kawasaki Steel Co DEVICE FOR PRODUCING WELDED STEEL TUBES

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2225010A5 (en) * 1973-04-03 1974-10-31 Peugeot & Renault
DE2637733C3 (en) * 1976-08-21 1982-05-06 Bayer Ag, 5090 Leverkusen Process for the separation of dinitroanthraquinone mixtures
JPS5721420U (en) * 1980-07-08 1982-02-03
JPS5958503U (en) * 1982-10-12 1984-04-17 川崎製鉄株式会社 Hydraulic circuit of hydraulic cylinder for back-up roll of rolling mill

Also Published As

Publication number Publication date
JPS6149732A (en) 1986-03-11

Similar Documents

Publication Publication Date Title
EP0553480B1 (en) Rolling mill, rolling method and rolling mill system
US4033165A (en) Apparatus for controlling flatness of metal sheet during rolling
RU94009998A (en) METHOD OF ROLLING METAL STRIPS AND DEVICE FOR ITS IMPLEMENTATION
BR9201000A (en) APPARATUS FOR THE PRODUCTION OF HOT-LAMINATED STEEL STRIP AND METHOD FOR THE PRODUCTION OF THE SAME
DE19924860B4 (en) Rolling mill for sheet metal
US4392371A (en) Method of plate rolling and equipment therefor
JPH0811251B2 (en) Overload prevention device in cold roll forming
EP1200209B1 (en) Rolling stand for plane products and method to control the planarity of said products
JPS5823161B2 (en) How to roll plate material
US6220071B1 (en) Method and apparatus for controlling strip edge relief in a cluster rolling mill
CA1213762A (en) Method and apparatus for controlling width and thickness of strip
EP0132136B1 (en) Method & apparatus for edge rolling plate like stock material
JPS6334721Y2 (en)
US3394577A (en) Rolling mill
JPS6224804A (en) Rolling mill
JP3025370B2 (en) Rolling mill
JPH0415361Y2 (en)
JPH0526562B2 (en)
JPS626881B2 (en)
JPH0415365Y2 (en)
JPS61229405A (en) Method and apparatus for adjusting plate shape of rolling material
JPS609503A (en) Rolling mill
JPS59223107A (en) Shape control device for rolling mill
JPS5893503A (en) Rolling mill
JPH0110088Y2 (en)