US3911709A - Bending the edges of sheet or plate stock - Google Patents

Bending the edges of sheet or plate stock Download PDF

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Publication number
US3911709A
US3911709A US513955A US51395574A US3911709A US 3911709 A US3911709 A US 3911709A US 513955 A US513955 A US 513955A US 51395574 A US51395574 A US 51395574A US 3911709 A US3911709 A US 3911709A
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United States
Prior art keywords
bending
tools
tool
die
dies
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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
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US513955A
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English (en)
Inventor
Walter Randerath
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Vodafone GmbH
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Mannesmann AG
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Publication date
Priority claimed from DE19732352573 external-priority patent/DE2352573C3/de
Application filed by Mannesmann AG filed Critical Mannesmann AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending 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
    • B21D5/10—Bending 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 for making tubes
    • B21D5/12—Bending 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 for making tubes making use of forming-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/083—Supply, or operations combined with supply, of strip material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes

Definitions

  • the present invention relates to bending of sheets or plates in preparation of blanks to be used for making cylindrical hollow bodies, particularly seam welded steel tubes or pipes. More particularly, the invention refers to tooling for bending of sheets or plates in which one die or roll has convex contour cooperating with a complementary die or roll having concave contour.
  • Steel sheets or plates have to be bent near their edges to assume the radius of the pipe or tube to be made so that the subsequent tube bending places the edges into properly azimuthally aligned abutting position to obtain a split tube to be seam welded along these abutting edges.
  • the dies used here bend rather thick plates over the entire length in one bending step.
  • the convex die or roll should be pivotal or tiltable on an axis which runs parallel to the bending axis and which can be arrested and locked in a number of different tilt positions. It must be observed that the tool requires two sets of dies or rolls, one for each edge.
  • the two convexly contoured dies or rolls have therefore, parallely disposed tilt axes lying in a common plane.
  • the two concavely contoured dies or rolls are reciprocatively positioned for movement towards or away from each other, parallel to that plane.
  • FIG. I is a front view of a plate edge bending machine with dies in accordance with an example of the preferred embodiment of the present invention.
  • FIG. 2 shows one pair of bending dies in closed position, no plate being inbetween
  • FIG. 3 shows the same pair of dies in a disposition for a plate or sheet having thickness S
  • FIG. 4 shows the lower die of the pair with explanatory markings as to the geometry involved
  • FIG. 5 shows that pair of dies for bending a plate at one edge with a rather small radius of curvature
  • FIG. 6 shows these dies for a medium radius of curvature of bending
  • FIG. 7 shows these dies for a large radius of curvature of bending
  • FIG. 8 shows an alternative example using rolls tool.
  • edge bending equipment shown in FIG. 1 works on two opposing edges of a thick steel sheet or plate 30 seen in that Figure in edge-on view but along the axes of bending.
  • Two sets of dies 1, I are provided in two C-shaped frames or stands 5 and 5 having their respective open sides face each other.
  • the die set 1 in frame 5 is comprised of upper and lower dies 2 and 3 respectively; the set 1 in frame 5' has corresponding upper and lower dies 2' and 3.
  • Upper dies 2 and 2' have symmetrically arranged convex contours; lower dies 3, 3' have symmetrically arranged concave contours.
  • bower dies 3, 3 are supported by tool carriers 4, 4 and are respectively laterally movable relative thereto, particularly in the horizontal direction parallel to the plane of the drawing in FIG. 1, so that each die 3 and 3 is respectively movable laterally as to its vertical alignment with die 2, 2' and independantly from the respective other set of dies.
  • Movement is provided for respectively by means 7, 8 for die 3, which may be hydraulic actuators for moving and positioning die 3 on carrier 4.
  • the lower dies may be laterally displaced by means of adjustment spindles 7 and 8 as shown in FIG. 2, to obtain e.g. micrometer like adjustment in the disposition of lower die 3 on carrier 4.
  • Analogous actuators operate die 3' in carrier 4.
  • the tool or die carrier 4 is secured to a hydraulic piston/cylinder arrangement 6 for up and down movement.
  • Carrier 4' is analogously operated in frame 5.
  • These piston/cylinder drives provide the main power for the bending of the two edges of sheet 30 as stated.
  • the lower dies serve as rams which push the edges of a plate up against the respective upper die to obtain conformity of contour with the die contours.
  • the bending operation could be carried in down direction.
  • the upper die 2 is held by pivot arm 19 which is journalled on a shaft or bolt 13 for pivoting or tilting about horizontal axis II.
  • the upper die 2' is held by a similar pivot arm, also being joumalled on a bolt for pivoting about an axis 11'.
  • the two axes 11, 11 extend parallel to each other and both extend transverse to the plane of the drawing.
  • Reference numerals l2, l2 refer respectively to hydraulic actuators for moving, i.e., tilting the upper dies 2, 2' and holding them in the respective tilt position.
  • Positive mechanical locks may additionally provide for position arresting and holding the dies against bending pressure.
  • the two C-frames and 5 are mounted on or constructed as carriages running on rails 9 so as to adjust the distance between the two edge bending tools to the width of the sheets or plate, and to determine the extent of insertion of a plate edge between the dies of a set.
  • FIGS. 2 and 3 in particular show a pair of dies wherein the convex contour 17 of upper die 2 and the concave contour 16 of lower die 3 are essentially portions of the same circular involute.
  • FIG. 4 shows that involute per se on the lower die 3.
  • FIG. 4 is an example of an involute with three radii, rl, r2, r3 being particularly indicated. That number is arbitrary and additional once between a largest (r3) and the smallest (rl could well be indicated because the involute provides for continuous transition from a smallest radius rl to a largest radius r3.
  • FIG. 2 shows upper die 2 seated on lower die 3 and one can say that between upper and lower contours l6,
  • the disposition of the dies 2, 3 in FIG. 3 is obtained, beginning with the disposition of FIG. 2, in that upper die 2 is tilted about its pivot axis 11 of a fixed bolt I3.
  • the initial tilt position of FIG. 2 is indicated in FIGS. 2 and 3 by a dash dot line 14, representing for example a straight down hanging disposition of upper die 2.
  • the die 2 on arm 19 is tilted by operation of the tilt actuator 12 in direction of arrow 15 until a tilt position defined by 14' is obtained.
  • the tilt angle is indicated by the two arrows 20.
  • lower die 3 is laterally (horizontally) displaced in direction of arrow 21.
  • the particular combination of lateral displacement and tilting establishes a particular value for gap S whose width is indeed constant throughout the upper-lower die combination.
  • FIG. 3 shows of course, the final disposition of the dies when bending a sheet. That disposition is obtained after the downwardly retracted die 3 has been pushed up by the vertical drive 6.
  • the originally plane plate 30 is thereby bent up and forced against upper die 2, and the FIG. 3 shows the final disposition of the dies when the edge of a sheet or plate of thickness S has been bent by having been forced to adapt to the contours of the upper and lower dies.
  • pivot and tilt axis ll of die 2 could be placed in the center of the base circle of the circular involute as defining contour 17 for a disposition of die 2 given by 14.
  • pivoting of the upper die suffices for adapting the die to any particular plate thickness
  • the lower dies do not have to be laterally shifted.
  • constructing the dies in that manner may require to place pivot axis I] quite far from die 2 so that additional construction complications may be encountered. Therefore, a combination of upper die tilt and lower die lateral displacement was found simpler and is preferred.
  • contours 16, 17 are sections of one and the same circular involute to the extent they do overlap. However, upper die 2 and its contour 17 extends somewhat beyond contour 16 to obtain dependancy on the plate thickness range to be covered by this set of tools (dies). Therefore, the statement that contours l6, 17 match essentially has to be understood in this context.
  • FIGS. 5, 6 and 7 now illustrate how a plate of the same thickness (tilt/lateral displacement adjustment of being the same) can be bent at its edges to a different radius of curvature.
  • FIG. 7 can be understood also as a view of a detail of FIG. 1 on an enlarged scale, as sheet 30 in Figure is bent as indicated in detail in FIG. 7.
  • the sheet 28 of FIG. 5 (or 27 of FIG. 6) is to be gripped by the edge bending tool so that the edge proper 29 of that sheet reaches exactly to the radius of smallest curvature to be obtained. From that point the radius increases until merging to the straight end of the involute.
  • the plate 28 in FIG. 5 has its edge bent to the smallest radius r, of the involute.
  • the edge of plate 27 in FIG. 6 is bent to a radius somewhat larger, while plate 30 is bent to radius r2.
  • tilt adjustment possibly together with lateral adjustment of the lower die matches and adapts the die set to the thickness of the plate whose edges are to be bent.
  • This is an adjustment carried out in each frame 5, 5 independantly. Shifting the frames 5, 5 towards or away from each other does not only adapt the system to the width of the sheets or plate, but also to the radius of bending, i.e., to the degree of lateral insertion of the plate into each set of dies. That adjustment however, must take the plate thickness into consideration.
  • Any effective radius of curvature of the lower die will, in the adjusted final disposition, be radially aligned with a particularly effective radius of curvature in the upper die. That latter radius will be reduced by the thickness or gap width S as compared with the former, so that radially aligned contour radii of the two contours have the same center of curving.
  • the following table shows dimensions of a lower die corresponding to FIG. 4, the upper die has corresponding dimensions.
  • the die width b was 285 mm for bending an edge portion of a plate which is at least 1/15 of the final pipe periphery.
  • the resulting smallest pipe to be made may-have a diameter of 24 inches so that the smallest radius of curvature in the involute should be half that value or 12 inches.
  • the largest pipe to be made could be 35 inches in diameter so that the largest involute radius to be used is about 17.5 inches. The largest involute radius present will then be about 24 inches.
  • FIG. 8 shows an alternative mode of practicing the invention.
  • a roll 2a may have bulging contour of the circular involute type as to its profile.
  • Roll 3a is correspondingly concave.
  • These rolls are mounted or journalled shafts 22, 23.
  • roll 2a is mounted on shaft 22 but in a manner permitting pivoting on an axis of a bolt 24 which intersects the axis of shaft 22.
  • the roll 2a therefore, can be tilted for the same purpose die 2 is tiltably mounted.
  • Roll 3a is mounted for axial displacement on shaft 23 (arrow 18) and shaft 23 can be displaced relative to roll axis 22, as indicated by arrow 25. This way, the rolling gap is adapted to the plate thickness. The relative position of the roll stand to the sheet or plate determines again the effective smallest radius of bending.
  • Device for bending the edges of sheet or plate stock for example, in preparation of making seam welding pipes or tubes, comprising:
  • a first tool with a convex contour being a section of a circular involute and being mounted for pivoting on an axis parallel to an axis of bending;
  • a second tool with a concave contour being a section of essentially the same circular involute, the first and second tools being mounted for lateral displacement relative to each other transverse to said axis;
  • means for adjusting the final working disposition between upper and lower tool including pivoting of the first tool relative to the second tool and lateral displacement of said tools relative to each other prior to a bending operation for obtaining constant gap width as between the two contours, said tools being held in their respective adjusted position during bending.
  • first tool is an upper die
  • second tool being a lower die
  • hydraulic means for moving upper and lower dies towards each other the upper die being mounted for pivotal adjustment of its disposition relative to the lower die.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US513955A 1973-10-17 1974-10-11 Bending the edges of sheet or plate stock Expired - Lifetime US3911709A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732352573 DE2352573C3 (de) 1973-10-17 Blechkantenanbiegevorrichtung in einer Anlage zum Herstellen zylindrischer Hohlkörper, insbesondere nahtgeschweißter Stahlrohre

Publications (1)

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US3911709A true US3911709A (en) 1975-10-14

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US513955A Expired - Lifetime US3911709A (en) 1973-10-17 1974-10-11 Bending the edges of sheet or plate stock

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US (1) US3911709A (enrdf_load_stackoverflow)
JP (1) JPS5067259A (enrdf_load_stackoverflow)
FR (1) FR2248094B1 (enrdf_load_stackoverflow)
GB (1) GB1481339A (enrdf_load_stackoverflow)
IT (1) IT1022346B (enrdf_load_stackoverflow)
SU (1) SU654153A3 (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2332079A1 (fr) * 1975-11-21 1977-06-17 Holland Mechanics Bv Procede de formage d'elements circulaires, notamment de jantes, a partir d'une bande metallique profilee droite, et appareil pour sa mise en oeuvre
US20080202359A1 (en) * 2007-02-16 2008-08-28 Siempelkamp Maschinen-Und Anlagenbau Gmbh & Co. Kg Plate-crimping press for making pipe
ITMI20081994A1 (it) * 2008-11-11 2010-05-12 Sms Demag Innse Spa Pressa piega-bordi
US20120011913A1 (en) * 2008-12-26 2012-01-19 Keinosuke Iguchi Roll former for steel plate and roll bending method for steel plate using same
US20130256275A1 (en) * 2010-03-26 2013-10-03 Sumitomo Metal Industries, Ltd. Manufacturing method and manufacturing apparatus for uoe steel pipe or tube
CN107030146A (zh) * 2017-05-11 2017-08-11 南通奥特机械设备有限公司 自适应双边折弯机
CN107838261A (zh) * 2017-11-17 2018-03-27 海盐鸿强五金制造有限公司 一种快速出料的五金件冲压设备
CN108994120A (zh) * 2018-08-01 2018-12-14 上海锆卓船舶设计有限公司 适用超高强度、超厚钢板的小直径圆筒的卷制方法及系统
CN110961499A (zh) * 2018-09-28 2020-04-07 宝山钢铁股份有限公司 一种u成形机模具的工作面型线及其生成方法
CN111438236A (zh) * 2020-03-30 2020-07-24 大同新成新材料股份有限公司 智能受电弓碳滑板用两端同步折弯机及其操作方法
CN111918727A (zh) * 2018-03-30 2020-11-10 杰富意钢铁株式会社 钢板的端部弯曲方法及装置以及钢管的制造方法及设备
CN116140438A (zh) * 2022-12-06 2023-05-23 中铁上海工程局集团有限公司 一种异形曲面板单元成型及控制方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2455596C3 (de) * 1974-11-23 1978-05-03 Mannesmann Ag, 4000 Duesseldorf Presse mit Konvex- und Konkavwerkzeug zum Anbiegen der Ränder von Blechen
CN111954580B (zh) * 2018-03-30 2022-05-10 杰富意钢铁株式会社 钢板的端部弯曲方法及装置以及钢管的制造方法及设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1585696A (en) * 1922-12-04 1926-05-25 Smith Henry Collier Roll
US1649613A (en) * 1925-07-06 1927-11-15 Spiral Radiator Company Machine for shaping the edges of sheet material
US3159199A (en) * 1962-07-30 1964-12-01 Abbey Etna Machine Co Cluster roll assembly for tube mills
US3472053A (en) * 1967-02-10 1969-10-14 Yoder Co Tube mill

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1585696A (en) * 1922-12-04 1926-05-25 Smith Henry Collier Roll
US1649613A (en) * 1925-07-06 1927-11-15 Spiral Radiator Company Machine for shaping the edges of sheet material
US3159199A (en) * 1962-07-30 1964-12-01 Abbey Etna Machine Co Cluster roll assembly for tube mills
US3472053A (en) * 1967-02-10 1969-10-14 Yoder Co Tube mill

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2332079A1 (fr) * 1975-11-21 1977-06-17 Holland Mechanics Bv Procede de formage d'elements circulaires, notamment de jantes, a partir d'une bande metallique profilee droite, et appareil pour sa mise en oeuvre
US20080202359A1 (en) * 2007-02-16 2008-08-28 Siempelkamp Maschinen-Und Anlagenbau Gmbh & Co. Kg Plate-crimping press for making pipe
US7765849B2 (en) * 2007-02-16 2010-08-03 Siempelkamp Maschinen-Und Anlagenbau Gmbh & Co. Kg Plate-crimping press for making pipe
ITMI20081994A1 (it) * 2008-11-11 2010-05-12 Sms Demag Innse Spa Pressa piega-bordi
WO2010055459A3 (en) * 2008-11-11 2010-10-28 Sms Innse Spa Edge-bending press
US20120011913A1 (en) * 2008-12-26 2012-01-19 Keinosuke Iguchi Roll former for steel plate and roll bending method for steel plate using same
US9149850B2 (en) * 2008-12-26 2015-10-06 Nippon Steel & Sumitomo Metal Corporation Roll former for steel plate and roll bending method for steel plate using same
US20130256275A1 (en) * 2010-03-26 2013-10-03 Sumitomo Metal Industries, Ltd. Manufacturing method and manufacturing apparatus for uoe steel pipe or tube
CN107030146A (zh) * 2017-05-11 2017-08-11 南通奥特机械设备有限公司 自适应双边折弯机
CN107838261A (zh) * 2017-11-17 2018-03-27 海盐鸿强五金制造有限公司 一种快速出料的五金件冲压设备
CN107838261B (zh) * 2017-11-17 2023-06-30 海盐鸿强五金制造有限公司 一种快速出料的五金件冲压设备
CN111918727A (zh) * 2018-03-30 2020-11-10 杰富意钢铁株式会社 钢板的端部弯曲方法及装置以及钢管的制造方法及设备
CN108994120A (zh) * 2018-08-01 2018-12-14 上海锆卓船舶设计有限公司 适用超高强度、超厚钢板的小直径圆筒的卷制方法及系统
CN110961499A (zh) * 2018-09-28 2020-04-07 宝山钢铁股份有限公司 一种u成形机模具的工作面型线及其生成方法
CN110961499B (zh) * 2018-09-28 2021-06-15 宝山钢铁股份有限公司 一种u成形机模具的工作面型线及其生成方法
CN111438236A (zh) * 2020-03-30 2020-07-24 大同新成新材料股份有限公司 智能受电弓碳滑板用两端同步折弯机及其操作方法
CN116140438A (zh) * 2022-12-06 2023-05-23 中铁上海工程局集团有限公司 一种异形曲面板单元成型及控制方法

Also Published As

Publication number Publication date
IT1022346B (it) 1978-03-20
SU654153A3 (ru) 1979-03-25
GB1481339A (en) 1977-07-27
DE2352573B2 (de) 1976-06-10
FR2248094A1 (enrdf_load_stackoverflow) 1975-05-16
DE2352573A1 (de) 1975-04-30
JPS5067259A (enrdf_load_stackoverflow) 1975-06-05
FR2248094B1 (enrdf_load_stackoverflow) 1980-07-25

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