EP0879102A1 - Rundbiegemaschine - Google Patents
RundbiegemaschineInfo
- Publication number
- EP0879102A1 EP0879102A1 EP97900542A EP97900542A EP0879102A1 EP 0879102 A1 EP0879102 A1 EP 0879102A1 EP 97900542 A EP97900542 A EP 97900542A EP 97900542 A EP97900542 A EP 97900542A EP 0879102 A1 EP0879102 A1 EP 0879102A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bending
- bending machine
- rollers
- roller
- plate
- 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
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
Definitions
- the invention relates to a round bending machine with which a piece of metal can be brought into a shape that is round or elliptical in cross-section, for example into a hollow cylindrical or conical shape.
- Three or four-roll bending machines are usually used for the cylindrical bending of metal sheets.
- a workpiece can be continuously, i.e. during a single pass through the machine, or in sections, i.e. In several passes, they are formed into a cylindrical tube, for which purpose at least one of the rollers is designed to be vertically displaceable.
- the displaceable rollers must be adjustable so that the axes of all the rollers acting on the workpiece run exactly parallel to one another so that the lines of contact on which the rollers exert forces on the workpiece run parallel to each other.
- a great difficulty in bending rounds is to form a cylindrical body, that is to say a body with a reasonably exactly circular cross section, from thick-walled sheet metal plates, that is to say plates with a thickness of 30 mm and a length of 12 m, for example.
- the difficulty also lies in the fact that measures must be taken for long pipes which prevent the rolls from bending - in particular the upper roll - which measures cannot consist in one
- top roller with the largest possible diameter, since 3a the diameter of the top roller must be smaller than the inside diameter of the cylinder shape to be produced.
- several machines are already known, all of which have their specific areas of application.
- Three-roller maschmas are known, the rollers of which are mounted at C two ends in a frame so as to be vertically displaceable.
- This is, for example, a machine in which the roll section intended for gripping the plate is delimited by two stationary stands. The latter are intended to apply the bending pressure to the top roller and are at a distance from each other through which the
- Production capacity of the machine is limited in relation to the length and the thickness of the sheets to be bent. Since the rollers bend when the workpiece is deformed and this deflection is dependent on the roller length and the roller thickness and the thickness of the workpiece, the use of such machines is limited to the production of relatively short honing cylinders. A significant improvement of such mascnmen can be achieved by exerting a counterforce on the roller rollers of the upper rollers, which 5 causes the parallelism between the axis of the lower roller roll and the geometric axis of the effective part of the top roller is improved.
- This prestressing force acting on the roller ends is now dependent, inter alia, on the length of the effective part of the top roller and on the thickness of the workpiece, that is to say on the length and thickness of a pipe to be produced.
- Known bending machines of this type can be used to produce tubes of different lengths, for example tubes with a wall thickness of approximately 30 mm and a length of 6 or 12 m.
- tubes with a wall thickness of approximately 30 mm and a length of 6 or 12 m When bending short, e.g. 6 m long metal plates, pipes with a wall thickness of around 30 mm, possibly even 35 mm, can be produced with this machine, but not pipes with a wall thickness of 60 mm, for example, which is easy to see maybe should seem possible.
- the two stands are at a distance from one another which is set to a maximum plate length of, for example, 12 m, and that the effective part of the top roller is exactly the same length when bending short plates as when bending long plates. If, for example, you want to round bend shorter plates with correspondingly larger wall thicknesses, this has to be done with other bending tools, for example with a different top roller, or on another bending machine with a correspondingly shorter stand spacing.
- a three-roll bending machine is also known from EP-A-0 454 619. This has several C-shaped stands, which are distributed along the rollers and support them. The machine is essentially characterized in that it is evenly distributed over the length of the roll
- C-shaped stands are provided with one pair of support rolls for each roll, the pairs which are assigned to adjustable rolls additionally having means for shifting them in a plane perpendicular to the roll axes.
- this machine how Incidentally, also in the bending machine described above - provide all rolls with an electric or hydraulic motor.
- Such machines can be used to produce pipes of relatively long length, but not pipes with wall thicknesses that differ significantly from one another.
- the tubes cannot be bent or Establish rolling pass. Rather, it is necessary here to bend the workpiece in two rolling operations to form a tube, for which purpose the workpiece has to be pulled out of the machine after a first working step, that is to say when it is half finished, and turned for the subsequent round bending. for which not only the necessary aids but also a large space and a corresponding amount of time are required.
- Relatively fast is understood here to mean less time than 5 mir.
- FIG. 1 shows a simplified view of the long side of a three-roll bending machine with a vertically displaceable outer roller
- FIG. 5 shows a top view of the bending machine shown in FIG. 1
- the two side or bottom rollers 6 and 7 smd are separated from one another by an intermediate space and are arranged symmetrically with respect to a central plane running through the axis of rotation of the top roller 5.
- At least one of the three rollers 5, 6 and 7 is connected to a drive motor, expediently to a hydraulic or electric motor.
- a drive motor expediently to a hydraulic or electric motor.
- the top roller 5 is coupled to a drive device 8 with its end shown on the left in FIG. 1.
- the end of the bending machine 3 shown on the left in FIG. 1 consequently forms the drive side of the upper roller 5.
- the end of the bending machine shown on the right in FIG. 1 is referred to as a folding bearing side or an extension side.
- the folding bearing side is essentially characterized by the fact that the bearing and suspension means carrying the upper roller 5, among other things, can be decoupled from it and pivoted away from it, as is known in other three- or four-roller machines, in which one workpiece 9 shaped into a hollow cylinder is parallel to the rollers 5.
- the Rundoiegemaschme 3 also has two stands 11 which are arranged horizontally displaceably along the rollers 5, 6 and 7.
- the two Stander 11 define the particular for receiving the ⁇ za bending work Stuckes 9 Walzab ⁇ section of the rollers 5, 6 and 7 and smd in the operating state, preferably only slightly from the side of the removed part to be machined Randern Stuckes.
- each stand 11 in a projection parallel to the rollers 5, 6 and 7, each stand 11 has an essentially square, namely rectangular, outline and has two 5 sides of the rollers 6 and 7 facing away from one another arranged, vertical side parts 12, their upper ends connecting horizontal yoke 13 and their lower ends connecting plate 14.
- the side parts 12 sit with their lower ends movably in the horizontal guides 4a of the
- Slider 15 arranged. This slide 15 is guided by means of guide elements 16, for example rails, arranged on the side parts 12 in a straight line and at right angles to the axes of rotation of the rollers 5, 6 and 7. Used to move
- 2G here is a hydraulic adjusting device with a piston 17 and a cylinder 18.
- the slide 15 also has two rotatably mounted support rollers 19 and 20. These support rollers 19 and 20 serve for the external support of the upper rollers 5, which are here on the carriers 21 and 22 of the frame
- each stand 11 can be designed as a one-piece body or can be non-positively manufactured from four frame parts, namely a yoke, two side parts and a third base plate.
- the frame 4 of the bending machine 1 is provided with a plurality of support devices 25 arranged along the rollers 6 and 7 for rotating support of the two lower rare rollers 6 and 7 3c.
- Each support device 25 has two supports for this 26 and 27 on.
- two support rollers 28 with bearing means, not shown, are rotatably mounted about horizontal axes parallel to the longitudinal direction of the rollers.
- Each pair of support rollers 28 supported in a support 26, 27 rotatably supports eme of the two rollers 6 and 7, respectively.
- the uprights 11 arranged on both sides of the mentioned rolling section can be displaced horizontally.
- the bending machine 3 has means to adjust the distance d between the stands 11 as a function of the
- the stand 11 is preferably only a short distance from the lateral edges of the workpiece to be bent and the parallelism between the axis of the lower rollers and the geometric axis of the effective part of the top roller is largely guaranteed.
- each stand 11 has a hydraulic cylinder 31 arranged below the frame 4.
- This essentially consists of a cylinder head 32 and a displaceable piston rod 33, the cylinder head 32 in the area of the drive side of the top roller 5 or in the area of the called folding camp is attached to the floor 2.
- the piston rod 33 in turn serves as an adjusting means and is connected to the plate 14 of the stand 11.
- the two hydraulic cylinders 31 of the two stands 11 are preferably driven jointly by an electric or hydraulic motor which is provided with a transmission gear and is designed such that the two stands 11 can preferably be slid evenly against one another. and an almost continuous reduction or enlargement of the distance d is possible. 5
- two spindles can of course also be provided in order to horizontally shift the stands 11 against one another.
- the bending machine 3 is functionally the same as known three-roll bending machines and has hydraulic actuating devices for the positioning of the rolls, transport means for a workpiece to be bent, or a plate to be bent transversely to the rolls 5, 6 and 7 to move and a control device with manually operable actuators, electrical circuitry and possibly still pneumatic and / or hydraulic circuitry. 5
- the distance d is first set so that the lateral edges of the workpiece to be bent come to lie only a short distance from the stands 11. Furthermore, the bending force transmitted from the stands 11 to the roller 5 and the pretensioning force mentioned at the outset are set such that the parallelism between the axis of the lower rollers and the geometric axis of the effective part of the upper roller is largely ensured, such as that already known for 5 known bending machines.
- a flat plate for example the workpiece 9 shown in FIG. 2, is then transported horizontally into the bending section delimited by the two stands 11, in such a way that the plate with its long edge between the top roller 5 and the two side rollers 6 and 7 comes to rest. Thereafter, the roller 5 previously located at a distance above the plate is lowered until it engages a strip-shaped section of the plate. Then c is the top roller 5 down between the oeiden so- rollers 6 and 7 printed, whereupon the plate bends under the bending force generated thereby. By gradually rotating the rollers 5, 6 and 7, the plate can then be moved transversely to the longitudinal direction of the rollers and bent in the longitudinal direction to form a tube, as is already known in the case of known three-roller bending machines.
- Bodies can be bent, and this must be tolerated without any significant restriction in relation to their wall thickness and without any disadvantageous bending of the rollers.
- Bending machine of the type according to the invention can also be bent round, which for example have a length of about 6 m and a thickness of up to 60 mm. This is made possible in particular by an optimal adjustment of the distance d to the length of the plate to be bent, so that the effective part of the top roller, i.e. the roller section determined for gripping the plate is optimally designed for the length of the plate to be bent and the top roller is so supported that shorter tubes with correspondingly increased wall thickness can be produced with constant bending tools.
- four-roll bending machines m_t can also be provided with stands that can be moved against each other. There is also the option of only one of the to keep both stands displaceable and to arrange the other stand stationary on the frame of the bending device.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH23396 | 1996-01-30 | ||
CH23396 | 1996-01-30 | ||
CH233/96 | 1996-01-30 | ||
PCT/CH1997/000030 WO1997027957A1 (de) | 1996-01-30 | 1997-01-30 | Rundbiegemaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0879102A1 true EP0879102A1 (de) | 1998-11-25 |
EP0879102B1 EP0879102B1 (de) | 1999-12-08 |
Family
ID=4182327
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97900542A Expired - Lifetime EP0879102B1 (de) | 1996-01-30 | 1997-01-30 | Rundbiegemaschine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0879102B1 (de) |
AU (1) | AU1299897A (de) |
DE (1) | DE59700826D1 (de) |
WO (1) | WO1997027957A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2876927B1 (fr) * | 2004-10-25 | 2008-05-16 | Jammes Ind Sa Sa | Machine a cintrer les toles et ligne de fabrication incorporant une telle machine |
CN103658260A (zh) * | 2012-09-25 | 2014-03-26 | 昆山尚达智机械有限公司 | 新型二辊卷板机 |
KR102598878B1 (ko) * | 2023-04-03 | 2023-11-06 | 이피레이저 주식회사 | 다중롤 벤딩기 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1280343A (fr) * | 1961-02-13 | 1961-12-29 | Steel Construction & Eng Co | Machine à cintrer les tôles du type à pincement initial |
FR1555881A (de) * | 1967-12-22 | 1969-01-31 | ||
DE1752666C3 (de) * | 1968-06-29 | 1975-09-25 | Wilhelmsburger Maschinenfabrik, Hinrichs & Sohn, 2054 Geesthacht | Blechplattenbiegemaschine |
CH688437A5 (de) * | 1990-04-12 | 1997-09-30 | Haeusler Ag Chr | Zum Zylindrisch-Biegen einer Platte dienende Umformmaschine. |
-
1997
- 1997-01-30 AU AU12998/97A patent/AU1299897A/en not_active Abandoned
- 1997-01-30 DE DE59700826T patent/DE59700826D1/de not_active Expired - Fee Related
- 1997-01-30 WO PCT/CH1997/000030 patent/WO1997027957A1/de active IP Right Grant
- 1997-01-30 EP EP97900542A patent/EP0879102B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9727957A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59700826D1 (de) | 2000-01-13 |
EP0879102B1 (de) | 1999-12-08 |
WO1997027957A1 (de) | 1997-08-07 |
AU1299897A (en) | 1997-08-22 |
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