EP0118739A2 - Dispositif pour cintrer des tubes - Google Patents
Dispositif pour cintrer des tubes Download PDFInfo
- Publication number
- EP0118739A2 EP0118739A2 EP84101144A EP84101144A EP0118739A2 EP 0118739 A2 EP0118739 A2 EP 0118739A2 EP 84101144 A EP84101144 A EP 84101144A EP 84101144 A EP84101144 A EP 84101144A EP 0118739 A2 EP0118739 A2 EP 0118739A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- bending system
- pipe bending
- pipe
- tube
- template
- 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.)
- Granted
Links
Images
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.
- 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, railway wagons, etc. are to be brought into a mirror-symmetrical, parabolic configuration in order to then 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.
- 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 carried out by means of hydraulic working cylinders and is therefore low in noise.
- the adjustable template ensures that despite different material qualities, e.g. due to tolerances of the pipe 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 1o On a support (not shown), the base plate 1o is arranged horizontally at a height that it can be conveniently 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.
- base parts 16 are in one, in the top of the base plate recessed groove 18 inserted and fixed by means of cylinder head screws 2o.
- 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.
- 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 bending tools act on it; they deform the tube beyond the elastic limit in the direction of the template, care being taken to ensure that the tube cannot buckle or otherwise be deformed in an undesired manner.
- bores 28 of the base plate 30 of bearing blocks 32 are mounted in bores 28, in each of which a hydraulic working cylinder 34 is accommodated.
- the piston rod 36 is in each case connected by means of a Kuael joint 38 to a pressure shoe 40 which is screwed at one end to a support band 42 made of an elastically deformable material.
- the resetting of the shoes 4o into the starting position - shown in FIG. 1 - takes place by means of the helical tension springs 44.
- the support band preferably made of spring steel, prevents the tube from escaping between adjacent shoes.
- Fig. 2] lets the structure in recognize individual.
- the system has a support plate 46 which is penetrated by piston rods 48 of two hydraulic working cylinders 50, which transmit tensile forces to the support plate 46 by means of the nuts 52 when fed with pressure oil.
- compression coil springs 54 lift the plate upwards.
- the support plate On the side facing away from the tube, the support plate rests on the base parts 16 - an adjustment to pipes of different heights can be made by means of inserts (not shown) - and in a similar way the support plate is also supported on the molded part 12, from where it passes over the cantilever pipe to be bent.
- 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 6 0 and 62 of a lever arrangement which is pivotable about a bearing 64 of the base plate 1o.
- a guide piece 63 also extends upward from the lower arm 62 and is supported with a transverse arm in a groove 65 of the base plate.
- the arms 6 0 , 62 can be pivoted by means of a hydraulic working cylinder 66 in the counterclockwise direction from the initial position shown in FIG. 1 by about 9 0 °; 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 7o 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 in the shape of a parabola, the stroke of the working cylinder 56 must be dimensioned accordingly large so that it bridges the differences.
- the various working cylinders can be fed from a single pressure medium source or, depending on the power requirement, from pumps of correspondingly different designs. Power is supplied via control valves that can be handbet2011i g bar simple systems, but may be also connected to a sequencer. So that not too much pump power has to be installed, the feed to the working cylinders 34 and 56 takes place sequentially.
- the working cylinder 34 closest to the plane of symmetry of the system is first extended, whereby the workpiece is clamped.
- the next outer cylinders 34 are then actuated, and the bending takes place with the large bending radii.
- 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 shorter bending radii, the angular steps being specifiable by adjusting the stroke of cylinder 66, namely preferably becoming ever smaller with shorter 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 such that it moves not only upwards but also to the side of the center of curvature when the tube is released, which facilitates the removal of the tube after bending.
- pressure shoe 4o is not screwed to the support band 42, but rather is slidably connected in the direction of the pipe extension, a lateral displacement of individual pressure shoes is made possible when setting up the system, which may be necessary or expedient in certain cases. 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 also 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 the handling of the pipes.
- the swivel drive of this assembly can be constructed differently, for example in the form of a rack and pinion drive acting on a toothed segment with hydraulic actuation. If, finally, this assembly not only with one but with two in common hydraulic cylinders acting on the tube, 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)
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 |
---|---|---|---|
DE3307283 | 1983-03-02 | ||
DE19833307283 DE3307283A1 (de) | 1983-03-02 | 1983-03-02 | Rohrbiegeanlage |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0118739A2 true EP0118739A2 (fr) | 1984-09-19 |
EP0118739A3 EP0118739A3 (en) | 1984-12-19 |
EP0118739B1 EP0118739B1 (fr) | 1987-04-15 |
Family
ID=6192247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84101144A Expired EP0118739B1 (fr) | 1983-03-02 | 1984-02-04 | Dispositif pour cintrer des tubes |
Country Status (8)
Country | Link |
---|---|
US (1) | US4712406A (fr) |
EP (1) | EP0118739B1 (fr) |
JP (1) | JPS59193719A (fr) |
AT (1) | ATE26547T1 (fr) |
CS (1) | CS250239B2 (fr) |
DE (2) | DE3307283A1 (fr) |
ES (1) | ES8501262A1 (fr) |
SU (1) | SU1373301A3 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0177027A2 (fr) * | 1984-10-04 | 1986-04-09 | PINICAL YACHTBAU Gesellschaft mbH | Dispositif de cintrage sous traction de matériel allongé |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6296127A (ja) * | 1985-10-23 | 1987-05-02 | Mazda Motor Corp | 自動車の車高調整装置 |
JPH0158304U (fr) * | 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 |
Citations (5)
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 | ||
US2406182A (en) * | 1943-09-11 | 1946-08-20 | Charles S Foreman | Bending apparatus |
US3472055A (en) * | 1966-11-29 | 1969-10-14 | Harry Goble | Bending machines for bending metal bars or sections |
US3889508A (en) * | 1973-06-25 | 1975-06-17 | Sanyu Kosan Kabushiki Kaisha | Pole bending apparatus |
DE3000170A1 (de) * | 1980-01-04 | 1981-07-09 | W. Eckold AG, Trimmis-Station | Kern fuer ein zu biegendes rohr |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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 |
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 |
-
1983
- 1983-03-02 DE DE19833307283 patent/DE3307283A1/de not_active Withdrawn
-
1984
- 1984-02-04 EP EP84101144A patent/EP0118739B1/fr not_active Expired
- 1984-02-04 DE DE8484101144T patent/DE3463121D1/de not_active Expired
- 1984-02-04 AT AT84101144T patent/ATE26547T1/de not_active IP Right Cessation
- 1984-02-09 CS CS84945A patent/CS250239B2/cs unknown
- 1984-02-29 JP JP59036356A patent/JPS59193719A/ja active Granted
- 1984-03-01 ES ES530615A patent/ES8501262A1/es not_active Expired
- 1984-03-02 SU SU843709056A patent/SU1373301A3/ru active
-
1986
- 1986-05-21 US US06/865,899 patent/US4712406A/en not_active Expired - Fee Related
Patent Citations (5)
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 | ||
US2406182A (en) * | 1943-09-11 | 1946-08-20 | Charles S Foreman | Bending apparatus |
US3472055A (en) * | 1966-11-29 | 1969-10-14 | Harry Goble | Bending machines for bending metal bars or sections |
US3889508A (en) * | 1973-06-25 | 1975-06-17 | Sanyu Kosan Kabushiki Kaisha | Pole bending apparatus |
DE3000170A1 (de) * | 1980-01-04 | 1981-07-09 | W. Eckold AG, Trimmis-Station | Kern fuer ein zu biegendes rohr |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0177027A2 (fr) * | 1984-10-04 | 1986-04-09 | PINICAL YACHTBAU Gesellschaft mbH | Dispositif de cintrage sous traction de matériel allongé |
EP0177027A3 (fr) * | 1984-10-04 | 1987-09-30 | PINICAL YACHTBAU Gesellschaft mbH | Dispositif de cintrage sous traction de matériel allongé |
Also Published As
Publication number | Publication date |
---|---|
SU1373301A3 (ru) | 1988-02-07 |
DE3463121D1 (en) | 1987-05-21 |
ES530615A0 (es) | 1984-11-16 |
CS250239B2 (en) | 1987-04-16 |
EP0118739A3 (en) | 1984-12-19 |
JPS59193719A (ja) | 1984-11-02 |
DE3307283A1 (de) | 1984-09-06 |
ATE26547T1 (de) | 1987-05-15 |
US4712406A (en) | 1987-12-15 |
JPS6110212B2 (fr) | 1986-03-28 |
ES8501262A1 (es) | 1984-11-16 |
EP0118739B1 (fr) | 1987-04-15 |
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