EP0118739B1 - Rohrbiegeanlage - Google Patents

Rohrbiegeanlage Download PDF

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Publication number
EP0118739B1
EP0118739B1 EP84101144A EP84101144A EP0118739B1 EP 0118739 B1 EP0118739 B1 EP 0118739B1 EP 84101144 A EP84101144 A EP 84101144A EP 84101144 A EP84101144 A EP 84101144A EP 0118739 B1 EP0118739 B1 EP 0118739B1
Authority
EP
European Patent Office
Prior art keywords
tube
bending apparatus
working cylinders
template
tube bending
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
Application number
EP84101144A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0118739A2 (de
EP0118739A3 (en
Inventor
Theo Molz
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.)
Eckold AG
Original Assignee
ECKOLD W AG
Eckold AG
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 ECKOLD W AG, Eckold AG filed Critical ECKOLD W AG
Priority to AT84101144T priority Critical patent/ATE26547T1/de
Publication of EP0118739A2 publication Critical patent/EP0118739A2/de
Publication of EP0118739A3 publication Critical patent/EP0118739A3/de
Application granted granted Critical
Publication of EP0118739B1 publication Critical patent/EP0118739B1/de
Expired legal-status Critical Current

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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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only

Definitions

  • the invention relates to a pipe bending system according to the preamble of claim 1.
  • Certain tube bending operations have particular problems. This relates in particular to the case where tubes with a rectangular profile or C profile are present in large length dimensions, which are to be bent with great accuracy into predetermined shapes deviating from arcs. This is particularly the case when roof racks for buses, railroad cars, etc. are to be brought into a mirror-symmetrical, parabolic configuration in order to be welded to vertical supports.
  • a device in which the workpiece is passed together with a template through a hammer mill, in which numerous impacts are made on the tube, so that it is gradually cold forged into the desired shape.
  • This device requires great dexterity and is nevertheless prone to accidents because pipes of several meters in length can be freely handled in space. In addition, considerable noise is generated by the hammer mill.
  • a pipe bending system which has the features mentioned in the preamble of claim 1, is known from DE-C-77 950.
  • the tools are designed as pairs of rollers, which are arranged on a slide that can be moved along the carrier and guided on the template. Obviously, such a system can only be used for very easily deformable pipes and requires at least one further support with a further pair of rollers.
  • the object of the present invention is to create a low-noise pipe bending system for pipes with rectangular or C cross-section and U-cross-section, which can also be operated safely by inexperienced persons.
  • the tube is stationary during the bending process, which is preferably to be carried out by means of a hydraulic working cylinder and is therefore low in noise.
  • the adjustable template ensures that despite different material qualities, eg. B. due to tolerances of the tube wall thickness, changing elasticity modules, etc. the required accuracy can be maintained. Since the bending process begins in the middle of the pipe, where the greatest bending radii are generally present, and then continues towards the ends, the paths traveled at the free pipe ends are relatively small, so that the risk of accidents is also low.
  • the base plate 10 On a support (not shown), the base plate 10 is arranged horizontally at a height that it can be easily loaded with the pipes to be bent.
  • the auxiliary units, in particular the hydraulic pump (s), are accommodated below the base plate in the support; Above the base plate there is a template against which the workpiece is bent by means of forces acting essentially perpendicular to the longitudinal axis of the tube.
  • the template comprises a molded part 12 made of a material and in dimensions which are selected such that the molded part 12 is elastically deformable within relatively wide limits.
  • the molded part since the molded part has to withstand the very high forces occurring during the bending process, it is rigidly supported on its side facing away from the pipe 14 at relatively narrow intervals.
  • base parts 16 are inserted into a groove 18 countersunk in the upper side of the base plate and fixed by means of cylinder head screws 20.
  • threaded bolts extend through through holes 22 of the base parts and into threaded holes 24 of the molded part 12.
  • an adjusting nut 26 is seated on the threaded bolt.
  • the molded part is rigidly connected to the base in question at the point in question and thus to the base plate.
  • loosen one nut and tighten the other depending on whether the molded part should have a larger or a smaller curvature.
  • the basic shape of the molded part is already pre-bent so that it can be elastically deformed in both directions starting from this basic shape. According to this basic shape, the course of the groove 18, the shape of the base parts 16 and the direction of the through bores 22 are also defined therein.
  • the system has a support plate 46 which is penetrated by piston rods 48 of two hydraulic working cylinders 50 which, when fed with pressure oil, transmit tensile forces to the support plate 46 by means of the nuts 52. When the cylinders 50 are relieved, compression coil springs 54 lift the support plate 46 upwards.
  • the support plate On the side facing away from the tube, the support plate rests on the base parts 16 - an adaptation to pipes of different heights can be made by means of inserts (not shown) - and in a similar manner the support plate is also supported on the molded part 12, from where it is above the pipe to be bent protrudes.
  • a hydraulic working cylinder 56 which is received in a vertical support plate 58, serves as the bending tool.
  • This support plate 58 is screwed up and down to the arms 60 and 62, respectively, of a lever arrangement which can be pivoted about a bearing 64 of the base plate 10.
  • a guide piece 63 extends upward from the lower arm 62 and is supported with a transverse arm in a groove 65 of the base plate.
  • the arms 60, 62 can be pivoted counterclockwise by about 90 ° by means of a hydraulic working cylinder 66 from the starting position shown in FIG. 1; for the other tube end, which is to be bent mirror-symmetrically, the pivoting is of course carried out in the opposite sense.
  • the stroke of the piston 68 assigned to the working cylinder 56 is again transmitted by means of a ball joint 70 to a block 72 to which two pressure shoes 74, 76 are articulated. Since the support plate 58 moves along an arc, but the tube is to be bent approximately in the form of a parabola, the stroke of the working cylinder 56 must be dimensioned to be large enough to bridge the differences.
  • the various working cylinders can be supplied from a single pressure medium source or, depending on the power requirement, from correspondingly differently designed pumps.
  • the supply takes place via control valves, which can be manually operated in simple systems, but can also be connected to a sequential control system. So that not too much pump power has to be installed, the feed to the working cylinders 34 and 56 takes place sequentially.
  • the procedure is preferably such that, after a workpiece has been inserted, the working cylinders 34 closest to the plane of symmetry of the system are first extended, as a result of which the workpiece is clamped. The next outer cylinders 34 are then actuated and the bend with the large bending radii takes place. The above-mentioned bending mandrel is then introduced from the free pipe ends, after which the working cylinders 56 and 50 are simultaneously fed, and the cylinder 66 is actuated alternately with the latter.
  • the workpiece is deformed with ever smaller bending radii, the angular steps being specifiable by adjusting the stroke of cylinder 66, namely preferably always smaller with smaller bending radii.
  • the first workpieces of each batch are checked after finishing bending by means of a jig (not shown) and, if necessary, the molded part, as explained above, is adjusted to match the properties of the workpieces concerned.
  • the base plate can be divided in the middle and the two parts, together with the aggregates assigned to them, can be moved apart, the gap remaining in the middle being bridged by an insert plate.
  • the template is then also replaced or supplemented by an insert which can be used. In this way, the system can be adapted to pipes of different overall lengths.
  • the support plate 46 can be designed and arranged in this way. that it not only moves upwards when the tube is released, but also to the side of the center of curvature, which facilitates the removal of the tube after bending.
  • pressure shoe 40 is not screwed to the support band 42, but rather is slidably connected in the direction of the pipe extension, lateral displacement of individual pressure shoes is made possible when setting up the system, which is necessary or expedient in certain cases can be. This applies in particular when a two-part base plate is used, as mentioned above.
  • the swiveling arrangement of the hydraulic working cylinders 56 can only take place via a lower lever arm, as a result of which the system in the area of the pipe receptacle is open at the top, which facilitates handling of the pipes.
  • the swivel drive of this assembly can also be constructed differently, for example in the form of a rack and pinion drive acting on a toothed segment with hydraulic actuation.
  • this assembly is equipped with not only one hydraulic cylinder, but two hydraulic cylinders acting on the tube together, the two pressure shoes should be bridged by a support band, similar to the area of large bending radii.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
EP84101144A 1983-03-02 1984-02-04 Rohrbiegeanlage Expired EP0118739B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84101144T ATE26547T1 (de) 1983-03-02 1984-02-04 Rohrbiegeanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833307283 DE3307283A1 (de) 1983-03-02 1983-03-02 Rohrbiegeanlage
DE3307283 1983-03-02

Publications (3)

Publication Number Publication Date
EP0118739A2 EP0118739A2 (de) 1984-09-19
EP0118739A3 EP0118739A3 (en) 1984-12-19
EP0118739B1 true EP0118739B1 (de) 1987-04-15

Family

ID=6192247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101144A Expired EP0118739B1 (de) 1983-03-02 1984-02-04 Rohrbiegeanlage

Country Status (8)

Country Link
US (1) US4712406A (enrdf_load_stackoverflow)
EP (1) EP0118739B1 (enrdf_load_stackoverflow)
JP (1) JPS59193719A (enrdf_load_stackoverflow)
AT (1) ATE26547T1 (enrdf_load_stackoverflow)
CS (1) CS250239B2 (enrdf_load_stackoverflow)
DE (2) DE3307283A1 (enrdf_load_stackoverflow)
ES (1) ES8501262A1 (enrdf_load_stackoverflow)
SU (1) SU1373301A3 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0177027A3 (de) * 1984-10-04 1987-09-30 PINICAL YACHTBAU Gesellschaft mbH Vorrichtung zum Reckbiegen von strangförmigem Material
JPS6296127A (ja) * 1985-10-23 1987-05-02 Mazda Motor Corp 自動車の車高調整装置
JPH0158304U (enrdf_load_stackoverflow) * 1987-10-09 1989-04-12
DE3915855A1 (de) * 1989-05-16 1990-11-22 Walter E Spaeth Universal-biegewerkzeug
US5131254A (en) * 1991-01-29 1992-07-21 Whitefab, Inc Apparatus for bending beams
GB2275219B (en) * 1993-02-20 1995-06-07 Btr Plc Bending of elongate material
DE102008003067B4 (de) 2008-01-03 2013-05-29 Edag Gmbh & Co. Kgaa Verfahren und Biegewerkzeug zum Biegen eines Werkstücks
CN102581085B (zh) * 2012-02-28 2014-05-14 江苏奔宇车身制造有限公司 异型管整体弯曲成形装置

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE77950C (de) * F- A. PlAT, Paris, 10 rue St. Martin Maschine zum Biegen von Metallstäben, Röhren, Profileisen und dergl
US736835A (en) * 1902-08-16 1903-08-18 Pressed Steel Car Co Bending-machine.
US1349219A (en) * 1919-10-02 1920-08-10 George R Moore Pipe-bender
US2044322A (en) * 1934-06-16 1936-06-16 Murray Corp Method and means for bending tubing
US2018040A (en) * 1934-10-18 1935-10-22 Ternstedt Mfg Co Metal bending machine
US2190423A (en) * 1937-12-06 1940-02-13 Motor Products Corp Windshield frame bending machine
US2305850A (en) * 1940-05-27 1942-12-22 Briggs Mfg Co Bending machine
US2399348A (en) * 1943-03-01 1946-04-30 Hobbs Frank Bending mechanism
US2406182A (en) * 1943-09-11 1946-08-20 Charles S Foreman Bending apparatus
US2533470A (en) * 1945-03-10 1950-12-12 Socrates H Kapelis Bending apparatus
US2557346A (en) * 1948-06-12 1951-06-19 Lee B Green Multiple-bend metal-bending machine
US2850071A (en) * 1954-10-18 1958-09-02 Daniel W Kraybill Method and apparatus for stretchforming metal and controlling direction of pull
FR1128681A (fr) * 1955-07-05 1957-01-09 Perfectionnements apportés au ciutrage des profilés, notamment métalliques
US3181331A (en) * 1962-06-27 1965-05-04 Ite Circuit Breaker Ltd Article bending machine
GB1200178A (en) * 1966-11-29 1970-07-29 Harry Goble Improvements relating to bending machines for bending metal bars
JPS5220023B2 (enrdf_load_stackoverflow) * 1973-06-25 1977-06-01
JPS5391063A (en) * 1977-01-24 1978-08-10 Daido Metal Co Ltd Manufacturing method of arch shaped product with projection
SU766706A1 (ru) * 1978-12-14 1980-09-30 Предприятие П/Я В-2775 Универсальный гибочный штамп
US4212188A (en) * 1979-01-18 1980-07-15 The Boeing Company Apparatus for forming sheet metal
DE3000170C2 (de) * 1980-01-04 1984-09-06 W. Eckold AG, Trimmis Dorn für ein zu biegendes Rohr

Also Published As

Publication number Publication date
CS250239B2 (en) 1987-04-16
ATE26547T1 (de) 1987-05-15
JPS59193719A (ja) 1984-11-02
DE3463121D1 (en) 1987-05-21
DE3307283A1 (de) 1984-09-06
EP0118739A2 (de) 1984-09-19
US4712406A (en) 1987-12-15
ES530615A0 (es) 1984-11-16
JPS6110212B2 (enrdf_load_stackoverflow) 1986-03-28
SU1373301A3 (ru) 1988-02-07
ES8501262A1 (es) 1984-11-16
EP0118739A3 (en) 1984-12-19

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