EP0603366B1 - Assembly line for producing steel coffers for ceiling and/wall constructions from sheet metal plates - Google Patents

Abstract

PCT No. PCT/EP93/01640 Sec. 371 Date Aug. 2, 1994 Sec. 102(e) Date Aug. 2, 1994 PCT Filed Jun. 26, 1993 PCT Pub. No. WO94/01234 PCT Pub. Date Jan. 20, 1994.The assembly line for producing a steel coffer (2) for ceiling and/or wall structures, in particular for interior finishing and construction of ships, for transportable and movable buildings, for sheds, hotels and the like, from a sheet metal plate (1) comprises a cutting and/or stamping station (3), a bending press (4) with an associated manipulator (5) and an associated roller-ball table (6) and a welding station (7), as well as at least one trolley (8) in the form of an underfloor vehicle, an underfloor trolley, or the like, which can move back and forth under these stations (3, 5, 7). The bending press (4) is combined with a manipulator (5) designed as a semi-portal crane, which is movable with respect to this press (4) and has a gripper which is also movable, adjustable in height and rotatable around the height axis, by means of which the sheet metal plate (1) is fed in its required positions to the bending press (4). The bending press (4) has a hold-down device which can be swiveled to compensate various sheet metal thicknesses.

Description

The invention relates to a swivel bending press according to the preamble of claim 1 Manufacture of steel cassettes from sheet metal as Prefabricated components for ceiling and / or wall constructions, which in a C-frame a fixed press table, one height-adjustable hold-down device and one around the horizontal Bending axis (bending axis) pivotable in height in a guide Bending beam has.

From DE-U-91 11 219 is a according to the type mentioned built swivel bending press known in which the hold-down via a pressure medium cylinder and a lever linkage (Toggle lever) in a clamping and release position for the the bending metal sheet can be swiveled in height.

EP-A-021 3667 discloses a swivel bending press with feed and Discharge lifter for the sheet metal to be deformed and bent. The hold-down device can be moved in height using a pressure medium cylinder and the sheet metal deformation is carried out by two against each other pivoting bending cheeks.

WT Werkstattstechnik 81 (1991) March, No. 3, Berlin, DE describes electric bending machines of various types operated bending aids or with the lower press beam attached five-axis robot or special one Bending beam control.

These known swivel bending presses are too small due to this Pressing force and insufficient working area not for that Folding long and differently thick metal sheets for Suitable for the production of steel cassettes.

The object of the invention is to provide a swivel bending press for the Bending of long metal sheets to create a high Press force with uniform pressure, a large bending and Work area and a different sheet thickness compensation with low swivel stroke with adjustable pressing pressure on the metal sheet and for sheet metal approval.

This object is achieved by the Features of claim 1 solved. The subsequent claims 2 to 7 include advantageous further developments of the task solution.

The swivel bending press has a large swivel and Working area of 600 mm with the same size free Through opening. To a workpiece of length 12 m too edit, become shorter and at the same time stable Press units used as a battery of three presses. Each press is mainly made up of parts screwed together executed.

The rigid C-frame of the swivel bending press is as Welded construction carried out and the overall processing of the C-frame takes place in one clamping. The screw-on surfaces for guides, swivel motors and bearings are milled out and turned.

The bending beam is driven by two lateral ones Double tooth segments. A hydraulic swivel motor drives in in the middle a torsion shaft, at the ends pinions left and are attached to the right of the C-frame.

The swivel bending press is designed for 90 ° bending. The Allow dimensions of the bending beam and the bending drive swiveling through an angle of 120 °. The bending beam is in Every C-frame has many support rollers with a spherical tread and cam rollers with eccentric. The support rollers with their attachable eccentric shaft have a corresponding Flexibility due to better load distribution. Convex Treads prevent edge loads on the rollers. The Cam rollers are also mounted elastically. You will be in mounted a small distance from the guide rail so that it are not exposed to the deformation forces of the C-frame.

The bending forces are exerted on the cheek and the bending cheek body passed to the support rollers.

Above this roller guide for the bending beam that carries C-frame is a bearing in which an eccentric shaft is supported. The eccentric washers are in the eccentric eye of the connecting flange stored twice.

There is a locking cylinder eye on the upper part of the flange been attached. Each of the eye flanges is with that Downholder screwed.

The shaft is on one side of the middle eccentric eye of a hydraulic swivel motor via a reduction gear drivable. On the other side of the middle Eccentric eye is a swivel lever on the eccentric shaft attached. With a swivel lever, the hold-down is from Swivel motor swiveled in a controlled manner. The swivel motor are still supported by the locking cylinders.

The deformation forces of the hold-down and the C-frame are not transferred to the warehouse.

The swivel motor is screwed to the flange on the C-frame.

The manipulator stands when bending the narrow metal sheets near the hold-down. Swiveling down the hold-down device is then not free. In that case, the swiveling must controlled and coupled with the corresponding moving a manipulator. This control goes from Swivel motor via the encoder. The swing motor in Connection with the locking cylinder causes the pivoting of the Hold-down.

The swivel motor first generates the via the eccentric Hold down force (the force between the table and the Hold-down device). It becomes certain during the bending Residual clamping force reduced. The swivel motor is stopped during the Bending under oil pressure.

The locking cylinder is automatically locked like a piston, as soon as it is extended in the end position.

The bending machine (one or more coupled swivel bending presses) is optimized for bending the steel sheet from approx. 4 to 6 mm, with a breaking strength of 400 N / mm ² .

The bending force of the press is 850 kN. For a short time, the Press can be loaded with a force of 1200 kN, being can also be converted with a stronger swivel motor.

Each of the swivel bending presses a battery of three presses can be both separate individual press tables, as well as a common press table 12 m long.

On all C-frames of the swiveling presses Bending machines is one above the locking cylinder bearing Support surface for a guide rail support of a manipulator welded on. At the rear of the C-frame below is also a screw-on surface for a guide rail support educated. These areas enable the Connection of the three swivel bending presses with the manipulator in the tolerances of machining accuracy, what for Manufacturing the cassettes is extremely important. The bending machine with manipulator form a functional unit.

The swivel bending presses with a single length of 4 m, which according to the process of swivel bending are individual controlled, but designed so that they are seamless in one Battery of two or three machines on the workpiece at the same time (Sheet metal) can work.

The swivel bending press according to the invention can be used individually or integrate into a group on a production line with which in automatic throughput and manipulable machining positioning with short cycle times from a sheet of metal large, all required design features for the later use containing steel cassette in different Sheet thicknesses in a more rational and economical way Way can be made.

Fig. 1

eine Seitenansicht der Schwenkbiegepresse mit in die Spannstellung heruntergeschwenktem Niederhalter (volle Linie) und in gelüfteter Stellung des Niederhalters in strich-punktierten Linien,

Fig. 2

eine Seitenansicht der Schwenkbiegepresse mit hochgeschwenktem Niederhalter.

In the drawings, an embodiment of the invention is shown. It shows:

Fig. 1

a side view of the swivel bending press with the hold-down device pivoted down into the clamping position (full line) and in the released position of the hold-down device in dash-dotted lines,

Fig. 2

a side view of the swivel bending press with the holding-down device swung up.

The swivel bending press for the production of a steel cassette for Ceiling and / or wall constructions, especially for Interior fittings and superstructures on ships, for transportable and movable buildings, for halls, hotels and the like, from one Sheet (1) has one in a C-frame (22) fixed press table (23), a height-movable Hold-down device (24) and one around the horizontal folding axis (Bending axis) (25) in a guide (26) pivotable in height Bending beam (27).

The hold-down device (24) has a horizontal eccentric drive (28) via a hydraulic swivel motor (29) and one pressure-operated locking cylinder (30) swiveling in height C-frame (22) stored.

The hold-down device (24) is in through its eccentric drive (28) the one that cooperates with the press table (23), swung down Tension position (Fig. 1 full lines and Fig. 2 dash-dotted lines), regardless of this clamping position locking swivel and locking cylinder (30) with one low swivel stroke (H) to different sheet thicknesses (S) adjustable with pressure and to release the sheet (1) ventilated (Fig. 1 dash-dotted lines) and the Downholder (24) is through its eccentric drive (28) and unlocked swivel and locking cylinder (30) in the open Press position swiveled up (Fig. 2 full lines).

The eccentric drive (28) can be rotated in the C-frame (22) mounted eccentric shaft (31), on the one of a gear (32) of the hydraulic, flanged to the C-frame (22) Swivel motor (29) driven gear (33) and an eccentric (34) with turntable (35) and carrier (36) molded onto it to sit; the Niederhaiter (24) is supported with a swivel bearing (37) around the eccentric (34) and is movable with the same coupled and the driver (36) of the eccentric (34) cooperates the pivot bearing (37) for pivoting the hold-down frictionally together.

The swivel and locking cylinder (30) is above the Eccentric drive (28) and with its cylinder (30a) by one horizontal pivot axis (38) on the C-frame (22) and grips with its piston rod (30b) above the eccentric (34) in a horizontal pivot axis (39) on the pivot bearing (37) of the hold-down device (24).

The bending beam (27) is mounted on two swivel segments (40), which each in one in the C-opening (41) of the C-frame (22) on a circular arc guide (26) in Form of a roller guide positively guided, as a tooth segment trained and via a hydraulic swivel drive (42) are vertically pivotable with drive pinion (43).

The C-frame (22) is made up of three through connecting pipes (44) and the press table (23) held at a distance from each other and interconnected C-pillars (22a) are formed. On every C-stand (22a) supports an eccentric drive (28) with hydraulic Swivel motor (29) and all three eccentric drives (28) are through an eccentric shaft (31) acting as a torsion shaft coupled in terms of movement.

There is a swivel and locking cylinder on each C-stand (22a) (30) stored and the hold-down device (28) is each one Pivot bearing (37) carried by the eccentric drive (28) and is with the locking cylinders (30) connected. So the Swivel bending press (4) a total of three eccentric drives (28) and three swivel and locking cylinders (30).

The bending beam (27) is on the link guide (26) each C-stand (22a) guided swivel segments (40) over a continuous torrential drive shaft (43a) on which the with the toothed swivel segments (40) meshing drive pinion (43) sit, swiveling in the height direction.

It is preferred to bend the steel cassette one out of three or several strung together and synchronized controlled Swivel bending presses (4) formed into a modular Long swivel bending press grouped together use, so that even very long metal sheets, up to 12 m, can be folded in one bending step.

The swivel motor (29) for the eccentric drive (28) and the Swing motor (42) for the bending beam (27) are by Rotary encoder controlled and the swivel and locking cylinder (30) with a control unit (sensor) for locking and unlocking its piston rod (30b).

The formatted sheet (1) is manipulated by a manipulator (not shown) on a ball roller table (6) under Maintaining their support on the ball roller table (6) in the open swivel bending press (4) for performing the first Bending step entered.

The sheet (1) is used for each new bending step the swivel bending press (4) moved and for the creation a new edge profile (1d) from the swivel bending press (4) taken out, put in the new location and then back in entered the swivel bending press (4), the metal sheet (1) is always recorded on registration marks.

To carry out each bending step for the edge profile (1d) the hold-down plate (24) is swung down, clamps the sheet (1) between itself and the Press table (23) firmly and then the bending beam (27) is controlled swung up.

Then the bending beam (27) is pivoted back down and the hold-down device (24) is released so that the metal sheet (1) for set up the subsequent bending step in the press (4) and can be moved.

If the profile (1d) is created on one side of the board, the Sheet (1) from the manipulator from the swivel bending press (4) removed, rotated and to bend the profile on the next one Sheet metal side back into the swivel bending press (4) entered where the same bending steps are repeated.

The eccentric drive (28) keeps the pivoted down Hold-down device (24) with high contact pressure against the on the Press table (23) lying on the sheet (1) during each Bending step. The swivel and locking cylinder (30) extended and locked (Fig. 1).

To release the hold-down device (24), d. that is, to release the Sheet (1) for its displacement in the C-opening (41) for the subsequent bending step, the eccentric drive (28) operated by its swing motor (29); this twists that Gear (32) on the gear (33), the eccentric shaft (31) and thus the eccentric (34) and here remains the swivel and Locking cylinder (30) locked in its extended position.

By turning the eccentric (34), the Hold-down device (24) inevitably by being around the eccentric (34) bearing swivel bearing (37) raised and on a low Lift swivel path (H) slightly lifted off the sheet (1) - the hold-down device (24) moves with it Hold-down foot (24a) away from the bending edge (25) on one movement diagonally upwards and outwards - on one Slope of approximately 45 ° - in the dash-dotted in Fig. 1 Lines shown hold-down position and the sheet (1) is free to move.

The small stroke swivel path of the hold-down device (24) is due to the Articulated connection (39) with the swivel locking cylinder (30) despite its locking possible.

The eccentric is used to reclamp the sheet (1) (34) rotated in the opposite direction and thus the Hold-down device (24) pressed again against the metal sheet (1).

This swiveling stroke path (H) of the hold-down device (24) enables at the same time the compensation of different sheet thicknesses of about 4 to 10 mm, so that by the eccentric (34) Hold-down (24) on any sheet thickness in the aforementioned Strengths exert an equally high baling pressure.

If the sheet is thinner or thicker, the Eccentric (34) in a smaller or larger angle of rotation and thus the adaptation of the hold-down device (24) to the respective one Sheet thickness.

To open the swivel bending press (4), the swivel and Locking cylinder (30) unlocked and the eccentric drive (28) continues twisted, when striking his driver (36) on the Swivel bearing (37) pivots the hold-down device (24).

The unlocked cylinder (30) retracts and at the same time supports the swing-up movement of the hold-down device (24).

Due to the continuous eccentric shaft (31) and the arrangement of three eccentric drives (28) each swivel bending press (4), the has a length of approx. 4 m, a parallel swiveling of the Hold-down device (24) is guaranteed, even with short ones Bending areas in which the hold-down device (24) has only one Part of its length acts on the metal sheet (1); it arises thus no one-sided loading of the hold-down device (24). This also hits the long one, formed from three presses (4) Swivel bending press (4) too.

Due to notches on the corner, the Metal sheet (1) possible to fold the edge profiles (1d).

After all bending processes have been completed, the Manipulator the deformed sheet (1) and leads it to further processing.

Claims (7)

1. Folding press, which in a gap frame (22) has a stationary press bedplate (23), a height-adjustable holding-down device (24), and a bending cheek (27) which can be pivoted to different heights in a guide (26) around the horizontal fold axis (25),
   characterized in that
   the holding-down device (24) with a horizontal eccentric drive (28) is supported in bearings in the gap frame (22), so as to be height-adjustable, via a pivoting motor (29) and a pressure-operated pivot- and locking cylinder (30),
   in which the holding-down device (24) with its eccentric drive (28) in the tension position acting together with the press bedplate (23) and pivoted downwards, independent of the pivot- and locking cylinder (30) which locks this tension position, can be set - with a short pivot stroke (H) - to various sheet metal thicknesses (S) with pressing power, and can be lifted to release the sheet metal (1), and that the holding-down device (24) can be swung vertically into the opened press position by means of its eccentric drive (28) and the unlocked pivot- and locking cylinder (30).
2. Folding press in accordance with claim 1, characterized in that the eccentric drive (28) has an eccentric shaft (31) which is pivoted in the gap frame (22), on which [shaft] are a toothed wheel (33), which is driven by a toothed wheel (32) of the hydraulic pivoting motor (29) flange-mounted on the gap frame (22), and an eccentric (34) with rotary disk (35) and carrier (36) moulded on to it; and that the holding-down device (24) is carried with a pivoting bearing (37) around the eccentric (34) and motionally coupled to it, and that the carrier (36) of the eccentric (34) acts in a force-locking manner together with the pivoting bearing (37) to pivot the holding-down device (24) upwards.
3. Folding press in accordance with claim 2, characterized in that the pivot- and locking cylinder (30) lies above the eccentric drive (28) on the gap frame (22), and with its cylinder (30 a) it is carried in bearings around a horizontal pivot axis (38), and with its piston rod (30 b) engages, in an articulated manner, above the eccentric (34), in a horizontal pivot axis (39), on the pivoting bearing (37) of the holding-down device (24).
4. Folding press in accordance with one of the claims 1 to 3, characterized in that the bending cheek (27) is supported on bearings on two pivot segments (40), which in each case are positively guided in a connecting link guide (26) in the form of guide rollers which run on an arc in the C-opening (41) of the gap frame (22); are designed as a tooth segment; and which can be swung vertically via a hydraulic pivot drive (42) with driving pinions (43).
5. Folding press in accordance with one of the claims 1 to 4, characterized in that the gap frame (22) is formed from three C-posts (22 a) which are connected with one another and spaced apart by connection tubes (44) and by the press bedplate (23); that an eccentric drive (28) with hydraulic pivoting motor (29) is supported on bearings on each C-post (22 a), and all three eccentric drives (28) are motionally coupled via an eccentric shaft (31) which acts as a torsion shaft; and that on each C-post (22 a) a locking cylinder (30) is supported on bearings; and that the holding-down device (24) - with one pivoting bearing (37) each - is carried by the eccentric drive (28) and is connected with the locking cylinders (30).
6. Folding press in accordance with one of the claims 4 to 5, characterized in that the bending cheek (27) can be swung vertically with the pivot segments (40) which are guided on the connecting link guide (26) of each C-post (22 a) and with a central hydraulic pivoting motor (42) via a continuous torsion drive shaft (43 a), on which are driving pinions (43) which mesh with the toothed pivot segments (40).
7. Folding press with three or more folding presses (4) arranged in rows and which are synchronously controlled, in accordance with one of the claims 1 to 6, which are combined together as a construction module to form one long folding press.

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