US3848446A - Arrangement for bending steel plates - Google Patents

Arrangement for bending steel plates Download PDF

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Publication number
US3848446A
US3848446A US00284947A US28494772A US3848446A US 3848446 A US3848446 A US 3848446A US 00284947 A US00284947 A US 00284947A US 28494772 A US28494772 A US 28494772A US 3848446 A US3848446 A US 3848446A
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US
United States
Prior art keywords
rolls
bending
pair
hourglass
shaped
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
US00284947A
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English (en)
Inventor
Y Iwasaki
C Takeuchi
H Tsukamoto
N Maeda
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.)
Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
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Publication of US3848446A publication Critical patent/US3848446A/en
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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
    • B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers

Definitions

  • ABSTRACT A method of bending a steel plate to form a pressure outside plating for a spherical holder or the like which comprises arranging in the center a pair of pinch-type bending rolls of mating configurations, one of which being barrel-shaped and the other hourglass-shaped, either roll being adjustable in position toward and away from the other roll, disposing two hourglassshaped pressure bending rolls at appropriate distances away from the both ends of the said bending rolls in such a manner as to be adjustable at least in the same direction as the said bending rolls, and feeding the steel plate through the center pair of bending rolls and then along the hourglass-shaped pressure bending rolls.
  • This invention relates to a method and apparatus for bending steel plates for use in the construction of largesize pressure vessels, such as spherical holders, and more specifically to a method and apparatus for forming by bending part of the outside plating of such vessels.
  • the large curved steel plates for the manufacture of pressure vessels are usually fabricated by one of the four methods as classified below:
  • the cold double action press is used where the plates to be bent are less than 25 to 30 mm in thickness, for example for the fabrication of outer plates of tank trucks, and where a relatively large number of such plates are to be handled at a time.
  • the hot single action press which does not put any limitation to the thickness of the plate to be formed, is suited for the bending of outside plating of thick-walled spherical holders for transportation of natural gas or the like.
  • the forming by a press requires a male die as large as the workpiece and also a ring-shaped female die of the corresponding size, usually ranging in diameter from 2,000 to 3,000 mm. Therefore, the high die cost often makes the process economically infeasible. Moreover, the heavy weight of the die and stay intervals of the press are limiting factors in many cases.
  • Spinning is a process which has sometimes been resorted to in the forming of tank heads but not in the fabrication of curved plating for spherical holders.
  • the present invention has for its object to provide a method and apparatus by which the aforedescribed problems are all settled.
  • the present invention resides, in essence, in a method and apparatus for bending steel plates by feeding a plate through a combination of rolls consisting of a pair of pinch-type bending rolls in the center, both with a smaller diameter than that of the cylinder to be formed by the bent plates, one of the rolls being barrelshaped to mate with the other roll which is substantially hourglass-shaped, either of the rolls being movable toward and away from the other, and two hourglassshaped pressure bending rolls arranged in the front and rear of one of the pair of bending rolls, said pressure bending rolls being adjustable in position, if necessary, in the direction where the workpiece is being fed, said steel plate being driven forward by the center pair of bending rolls while being bent under pressure by the front and rear hourglass-shaped rolls.
  • FIG. 1 is a schematic side view showing an arrangement of rolls embodying the method of bending heavy steel plates in accordance with the invention
  • FIG. 2 is a front view of the center pair of pinch-type bending rolls.
  • FIG. 3 is a front view of one of the pressure bending rolls located adjacent the both sides of the center pair of rolls.
  • the reference character P indicates a thick plate being bent by a combination of bending rolls, i.e., a barrel-shaped upper roll 1, an hourglass-shaped lower roll 2 which is movable upward and downward as indicated by arrows, said rolls 1 and 2 constituting a pair of pinch-type bending rolls, at least one of the rolls being adapted to be coupled to a conventional drive, and hourglass-shaped pressure bending rolls 3, 4 which are also movable upward and downward and further back and forth in the plate feeding direction as indicated by arrows.
  • the hourglass-shaped rolls 3, 4 are held a suitable distance in either direction from the center bending rolls 1, 2, the distance being governed by the radius of curvature desired of the plate.
  • the mating rolls 1, 2 are driven in the opposite direction by the motor, so that the plate is fed backward, or in this case rightward.
  • the other hourglass-shaped roll 3 is raised for additional bending.
  • the procedure of passing the plate along the center hourglass-shaped roll 2 and the adjacent roll 4 or 3 while raising the latter for pressure application is repeated several times for gradual curving of the plate until the plate attains the desired-radius of curvature for the outside plating of a spherical holder, when the plate is taken out leftwardly of the roll arrangement.
  • the other roll members may be allowed to run freely instead to achieve the same bending efficiency.
  • the lower hourglass-shaped rolls 3 and 4 mounted adjacent the both ends of the pinch-type bending rolls 1, 2 are also divided into a plurality of roll members, for example into members 4a, 4b and 40 as shown in FIG. 3, so that either the middle member 4b or the both end members 40, 40 can freely run on a shaft 7.
  • An apparatus for bending a steel plate in three dimensions to form a pressure outside plating for a spherical holder or the like comprising in combination: an upper and lower roll arrangement including a center 4 pair of pinch-type bending rolls of mating configurations, one of which being barrel-shaped and the other hourglass-shaped, said pair of rolls being divided across their longitudinal axes into the same numbers of members, some of which are firedly mounted while the remaining members are rotatably mounted as followers, said center pair of bending rolls being adjustable in position toward and away from each other, and two other hourglass-shaped pressure bending rolls disposed at appropriate distances away from the pair of bending rolls in such a matter as to be adjustable in the same direction as the said bending rolls and also to be adjustable toward and away from the said pair of bending rolls, said two hourglass rolls being also'divided in the same manner across their longitudinal axes; whereby, desired bending is accomplished by forcing a plate through the center pair of bending rolls and along the hourglass rolls disposed on both sides of the pair,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Press Drives And Press Lines (AREA)
US00284947A 1971-09-08 1972-08-30 Arrangement for bending steel plates Expired - Lifetime US3848446A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46069566A JPS5131230B2 (de) 1971-09-08 1971-09-08

Publications (1)

Publication Number Publication Date
US3848446A true US3848446A (en) 1974-11-19

Family

ID=13406439

Family Applications (1)

Application Number Title Priority Date Filing Date
US00284947A Expired - Lifetime US3848446A (en) 1971-09-08 1972-08-30 Arrangement for bending steel plates

Country Status (8)

Country Link
US (1) US3848446A (de)
JP (1) JPS5131230B2 (de)
DE (1) DE2242970A1 (de)
FR (1) FR2152806B1 (de)
GB (1) GB1399926A (de)
IT (1) IT965243B (de)
NO (1) NO136516C (de)
SE (1) SE388548B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5036688A (en) * 1989-12-18 1991-08-06 Quality Trailer Products Corporation Fender forming system
US5586463A (en) * 1995-08-17 1996-12-24 Sheen; Reen-Yuan Pipe bending device
CN102189156A (zh) * 2010-12-31 2011-09-21 无锡市光彩机械制造有限公司 一种双向拱弯机
CN102688916A (zh) * 2012-06-06 2012-09-26 中国核工业华兴建设有限公司 穹顶双曲面成形设备
CN109127801A (zh) * 2018-08-28 2019-01-04 陈浩 一种压力锅炉的制造方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5020974A (de) * 1973-06-27 1975-03-05
JPS5546331Y2 (de) * 1977-11-11 1980-10-30
DE3105079C2 (de) * 1981-02-12 1986-12-04 Kotflügelfabrik H. Köver GmbH & Co KG, 2150 Buxtehude Biegemaschine zum Walzbiegen von Blechplatinen für die Herstellung von Kraftfahrzeugkotflügeln

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US18058A (en) * 1857-08-25 Improved bending-machine
US928220A (en) * 1908-08-21 1909-07-13 Philadelphia Pipe Bending Company Pipe-coiling machine.
US1038606A (en) * 1912-05-04 1912-09-17 W W Sly Mfg Company Machine for circling metal blanks.
US1376497A (en) * 1916-12-11 1921-05-03 Carl M Yoder Rolling or bending machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US18058A (en) * 1857-08-25 Improved bending-machine
US928220A (en) * 1908-08-21 1909-07-13 Philadelphia Pipe Bending Company Pipe-coiling machine.
US1038606A (en) * 1912-05-04 1912-09-17 W W Sly Mfg Company Machine for circling metal blanks.
US1376497A (en) * 1916-12-11 1921-05-03 Carl M Yoder Rolling or bending machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5036688A (en) * 1989-12-18 1991-08-06 Quality Trailer Products Corporation Fender forming system
US5586463A (en) * 1995-08-17 1996-12-24 Sheen; Reen-Yuan Pipe bending device
CN102189156A (zh) * 2010-12-31 2011-09-21 无锡市光彩机械制造有限公司 一种双向拱弯机
CN102189156B (zh) * 2010-12-31 2015-01-21 无锡市光彩机械制造有限公司 一种双向拱弯机
CN102688916A (zh) * 2012-06-06 2012-09-26 中国核工业华兴建设有限公司 穹顶双曲面成形设备
CN109127801A (zh) * 2018-08-28 2019-01-04 陈浩 一种压力锅炉的制造方法
CN109127801B (zh) * 2018-08-28 2019-12-20 阜阳安固锅炉压力容器制造有限公司 一种压力锅炉的制造方法

Also Published As

Publication number Publication date
JPS4834761A (de) 1973-05-22
DE2242970A1 (de) 1973-03-22
GB1399926A (en) 1975-07-02
FR2152806A1 (de) 1973-04-27
SE388548B (sv) 1976-10-11
JPS5131230B2 (de) 1976-09-06
IT965243B (it) 1974-01-31
NO136516C (no) 1977-09-21
FR2152806B1 (de) 1975-06-13
NO136516B (de) 1977-06-13

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