EP0478500B1 - Verfahren zum Rundbiegen von Blechen und Rundbiegevorrichtung zur Durchführung des Verfahrens - Google Patents

Verfahren zum Rundbiegen von Blechen und Rundbiegevorrichtung zur Durchführung des Verfahrens Download PDF

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Publication number
EP0478500B1
EP0478500B1 EP91810700A EP91810700A EP0478500B1 EP 0478500 B1 EP0478500 B1 EP 0478500B1 EP 91810700 A EP91810700 A EP 91810700A EP 91810700 A EP91810700 A EP 91810700A EP 0478500 B1 EP0478500 B1 EP 0478500B1
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EP
European Patent Office
Prior art keywords
sheet
bending
bent
deflecting member
bending device
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
EP91810700A
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German (de)
English (en)
French (fr)
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EP0478500A1 (de
Inventor
Hans Strub
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.)
STRUB AG
Original Assignee
STRUB AG
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Filing date
Publication date
Application filed by STRUB AG filed Critical STRUB AG
Publication of EP0478500A1 publication Critical patent/EP0478500A1/de
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Classifications

    • 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
    • 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
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B21D5/042—With a rotational movement of the bending blade

Definitions

  • the invention relates to a method for bending sheet metal according to the preamble of patent claim 1 and a circular bending device for carrying out the method according to the preamble of patent claim 2.
  • a support roller has been used as a counter-holder and two bending rollers.
  • the connecting lines of the three roller axes formed the legs of an almost equilateral triangle.
  • the sheet to be bent was pushed between the support roller and the two bending rollers, the bending rollers pressing the sheet against the support roller.
  • the bending roller had to be stored in several places to prevent it from bending.
  • the gaps for attaching the bearings gave annoying marks on the bent sheet.
  • only thick support roller axes could therefore be used for reasons of stability. The production of curved, long tubes with a small diameter was therefore not easily possible.
  • a spiral pipe welding machine for the production of pipes from spirally wound metal strips.
  • a sheet metal strip is slid through a lined guide slot with the help of drive rollers.
  • a deflecting roller arranged on the output side of the guide slot deflects the sheet metal strip and brings about a rounded deformation thereof.
  • the deflecting roller can be adjusted in position, both in the direction that leads to the bending edge and that leads away from it.
  • the band guide is pivoted. In this way, sheet metal strips of different widths can be taken into account.
  • the invention seeks to remedy this. It is based on the task of creating a simple round bending device, which also allows the round bending of long single and multi-walled tubes with a small diameter.
  • the round bending device shown in FIG. 1 for the round bending of sheet metal tubes 1, which are soldered, folded or welded together in a non-illustrated working step along their edge areas, which if necessary are slightly overlapping, has two through a slot 2 in which the sheet metal 4 to be bent is supplied with a pushing device designed here as a slide 3, spaced apart guide elements 5 and 7 as a guide device for the sheet 4 to be bent and a rail 9 with a deflecting surface 11 as a deflecting member.
  • the rail 9 and thus its deflecting surface 11 is adjustable in its vertical and horizontal position and in its inclination, as indicated by the arrows 13a, 13b and 13c.
  • the opposite sides, forming the slot 2, of the guide elements 5 and 7 arranged one above the other are of flat design, so that the slot 2 has approximately the same slot width for guiding the sheet 4 which is still to be bent.
  • the upper side of the guide element 7 serves as a sliding surface 14 for the sheet 4 to be bent.
  • the sheet 4 is slid on it by the slide 3 against the deflection surface 11.
  • the upper guide element 5 is prismatic, with a prism edge merging into a rounded edge 21 on its side facing the deflection surface 11.
  • the prism angle is designed in such a way that the sheet metal bent during the bending process has space in front of the outer prism surface 15.
  • the lower guide element 7 is cuboid. However, other shapes can also be selected.
  • the lower guide element 7 should be designed in such a way that the sheet 4 to be bent slides well on its surface, as already mentioned above, and the adjustment possibilities of the rail 9 are not restricted.
  • the upper guide element 5 can be adjusted parallel to the feed direction 16 of the sheet 4 to be bent, as indicated by the double arrow 17a.
  • the upper guide element 5 is adjustable perpendicular to the direction of displacement of the sheet 4 to be bent, as indicated by the double arrow 17b, around the slot 2 optimally to adjust to the sheet thickness, and to be able to carry out further process steps described below.
  • the slide 3 is withdrawn between the guide elements 5 and 7 and the sheet metal 4 to be bent is placed on the sliding surface 14 of the lower guide element 7. Subsequently, the sheet 4 is pushed with the slide 3 through the slot 2 against the deflecting surface 11, which bends the sheet 4 away from its feed direction 16 and thus bends it into a tube 1.
  • the bending radius and thus also the tube diameter result from the distance between the lines of incidence of the still unbent plate 4 pushed through the slot 2 on the deflection surface 11 from the edge 21 of the guide element adjacent to the deflection surface 11, closing the slot 2, the inclination of the deflection surface 11 and the location of the deflection surface 11 in relation to the plane in which the sheet metal part which is still unbent lies and from the material properties of the sheet metal 4 to be bent.
  • the position of the plane in which the sheet metal part which is still unbent lies lies only slightly different from the position of the plane , in which the sliding surface 14 lies.
  • the straight line of incidence of the still unbent sheet metal 4 pushed through the slot 2 on the deflection surface 11 is thus approximately the geometric extension of the sliding surface 14 up to the intersection with the deflection surface 11.
  • the front edge 23 of the sheet 4 slides thereon, is first bent away elastically and then permanently plastically.
  • the optimal distance, the inclination of the deflection surface 11 and its location are most easily determined by bending tests.
  • the inclination of the deflection surface 11 for copper as sheet material is greater than that for iron, and that for chrome-nickel steel is greater than that for copper .
  • the surfaces of the guide elements 5 and 7 forming the slot 2 do not have to run parallel to one another.
  • the surface of the lower guide element 7 should be arranged in such a way that the sheet 4 can slide well on it, as explained above.
  • the surface of the upper guide element 5 can run at any angle, only the edge 21 closest to the deflecting surface 11 should be arranged at a distance from the surface of the sliding surface 14 that corresponds to the sheet thickness of the sheet 4 to be bent plus a tolerance, since it has to serve as a counterhold during the bending process.
  • the upper guide element 5 now only acts as a counter-holder and can be moved away from or towards the lower guide element 7, as indicated by the double arrow 17a in FIG. 1, sheets (not shown) with folds at their ends can also be bent round. Before the fold of the front edge of the sheet passes the edge 21, it is raised by the guide element 7 and, after passing through the fold, lowered again against the sheet. The same procedure is used for the fold on the rear edge of the sheet.
  • a not shown recess can also be arranged behind the rounded edge 21, in which a fold of the sheet metal can move up to the edge 21. Shortly before the fold then reaches the edge 21, the guide element 5 is moved upwards so that the fold can be pushed past.
  • two prismatic guide elements 27a and 27b and, instead of a rail 9, two rails 29a and 29b, as shown in FIG. 2, are used in a variant 30 of the round bending device, the deflecting surfaces 31a and 31b of the rails 29a and 29b are each inclined to the plane of the non-bent plate 33, it is possible to produce wave-shaped bent plates.
  • multi-walled tubes can also be produced without adjusting the rail 9 or, in the case of thicker sheets, by adjusting the rail 9 during the bending process by spirally winding the sheet 4.
  • pipes and channels can also be produced in a simple manner and in good quality with a small bending radius.
  • the pipe bending device according to the invention has a simple structure, is easy to adjust and allows longer pipes with a small diameter to be bent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Press Drives And Press Lines (AREA)
EP91810700A 1990-09-28 1991-09-03 Verfahren zum Rundbiegen von Blechen und Rundbiegevorrichtung zur Durchführung des Verfahrens Expired - Lifetime EP0478500B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3125/90A CH681514A5 (enrdf_load_stackoverflow) 1990-09-28 1990-09-28
CH3125/90 1990-09-28

Publications (2)

Publication Number Publication Date
EP0478500A1 EP0478500A1 (de) 1992-04-01
EP0478500B1 true EP0478500B1 (de) 1994-08-17

Family

ID=4249149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810700A Expired - Lifetime EP0478500B1 (de) 1990-09-28 1991-09-03 Verfahren zum Rundbiegen von Blechen und Rundbiegevorrichtung zur Durchführung des Verfahrens

Country Status (4)

Country Link
EP (1) EP0478500B1 (enrdf_load_stackoverflow)
AT (1) ATE110014T1 (enrdf_load_stackoverflow)
CH (1) CH681514A5 (enrdf_load_stackoverflow)
DE (1) DE59102558D1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489560B (zh) * 2011-12-20 2015-04-15 华闽南配集团股份有限公司 利用钢带生产衬环工艺中切向等曲率弯曲加工设备
CN103386429B (zh) * 2012-05-10 2017-06-20 江阴德玛斯特钻具有限公司 钻杆螺纹保护套的卷圆机
CN106623527B (zh) * 2016-12-15 2018-08-17 新乡市振英机械设备有限公司 一种斗式提升机的提把加工工装
CN116618487B (zh) * 2022-10-20 2024-02-09 连云港市凤凰印铁制罐厂 一种适用于农药罐生产的卷板装置及其卷板方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039014B (de) * 1956-01-05 1958-09-18 Wilhelm Eckhardt Einrichtung zum schraubenfoermigen Aufwickeln von Baendern zu rohrfoermigen Koerpern
DE2408977A1 (de) * 1974-02-25 1975-09-04 Spiral Patents Pty Ltd Spiralrohr-schweissmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1128147A (fr) * 1955-06-27 1957-01-02 Creusot Forges Ateliers Perfectionnements aux machines à cintrer les tôles, et plus particulièrement à celles à quatre rouleaux
NL7510648A (nl) * 1975-09-10 1977-03-14 Ultra Centrifuge Nederland Nv Werkwijze resp. buigbank geschikt voor het buigen van vlakke strip tot een cilindrische gedaante.
US4549422A (en) * 1983-04-29 1985-10-29 Harrow Donald A Cup and roll machine
US4857412A (en) * 1986-01-16 1989-08-15 Paul Fleury Method for forming a planar sheet or plate to a curved shape

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039014B (de) * 1956-01-05 1958-09-18 Wilhelm Eckhardt Einrichtung zum schraubenfoermigen Aufwickeln von Baendern zu rohrfoermigen Koerpern
DE2408977A1 (de) * 1974-02-25 1975-09-04 Spiral Patents Pty Ltd Spiralrohr-schweissmaschine

Also Published As

Publication number Publication date
CH681514A5 (enrdf_load_stackoverflow) 1993-04-15
ATE110014T1 (de) 1994-09-15
DE59102558D1 (de) 1994-09-22
EP0478500A1 (de) 1992-04-01

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