DE1452867A1 - Pressing and regulating device for sheet leveling machines - Google Patents

Description

Patent attorneys α ι γ η, ρ C; Π

Dipl.-ing. Carpenter ι η ο £ gg /

Dipi.-ing. Linen weaver

Munich 2, Rosental 7
Tel. 2619 £ 8

18 Nov 19S8

Societe Mouvelle SPIDEM, Paris (France)

Pressing and regulating device for sheet leveling machines

The invention relates to a pressing and regulating device for plate leveling machines with leveling rollers arranged in two tracks, between which the rollers to be leveled Sheets are to be passed through.

Such straightening machines generally have two frames, an upper and a lower frame which the straightening rollers arranged in two parallel, essentially horizontal tracks are distributed » To dress the sheets, the two frames and thus the two Itfalzenbahnen are pressed against each other. This The pressing process must be accurate and reliable. Usually this is done using screws and nuts carried out, which are arranged, for example, at the four corners of the machine.

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The disadvantages of such a system are known. The accuracy is limited in all cases. The resistance to overloads is low. the The synchronization required to maintain the absolute parallelism of the two roller tracks is difficult and requires the use of complicated and therefore sensitive mechanisms.

Furthermore, a plate leveler must be able to open, i.e. one roller track must be separated from the other .Roller track for correct introduction of the sheet to be treated between these two tracks are lifted can. This process should go quickly. For this purpose, a 'pressing and regulating mechanism that works with screws and nuts is generally separate Swivel mechanism used.

The aim of the invention is to provide a hydroelectrically operated device in which these disadvantages are avoided and · the functions of pressing, regulating and opening by rapid Pivoting equally fulfilled. This pivoting movement can be carried out slowly or quickly, if desired depending on whether it is used to fine-tune the machine or to open it.

Another advantage of the invention is that the machine according to the invention with electric motors works whose performance is known to be lower than the performance normally required. This Feature is directly related to the high efficiency of the system according to the invention.

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A feature of the invention is that at each of the four corners of each · of the two frames an im essential horizontal approach is provided, with corresponding approaches of the two frames each other opposite. Each of these four pairs, each formed by a lower and an upper approach, is connected to one another by a pressure bracket. These brackets also serve as holders for the cylinder body the so-called press cylinder, the piston of which presses these approaches firmly against each other when he is under Pressure is set.

Furthermore, four counter-pressure cylinders, referred to below as compensation cylinders, are provided, which correspond to the four Counteract the press cylinders and push the two frames apart when they are pressurized.

The two pre-cylinders that are on one side of the machine, i.e. on the side on which the machine is normally must be able to be opened, are arranged, are in the manner described below with each other tied together. The straightening machine according to the invention can, incidentally, be on one side or open on the opposite side.

The pressure chamber of each press cylinder is connected to the pressure chamber of another work via a suitable conduit cylinder, the so-called immersion cylinder. The press cylinder here has a large cross section and a small stroke, while the plunger cylinder has a small cross-section and a large stroke. The amount trapped between the two cylinders

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the pressure medium remains constant, so everyone Large amplitude movement of one of the plunger cylinders, a movement in the opposite direction of low amplitude and high force of the corresponding press cylinder is equivalent to.

The two immersion cylinders, which are located on the same side of the "straightening machine," are in turn connected to each other, initially via their two cylinder bodies, which are firmly on a common Sockets are mounted, for example, on the upper frame attached, and also by their pistons, which are attached to each other so that they are always parallel, and move it by the same amount.

Each of the immersion cylinder piston pairs connected to one another in this way is connected to a further one Cylinder, the so-called regulating cylinder, coupled * whose body is mechanically connected to these two pistons and its piston is actuated by an electric motor via a reduction gear so that a rotation of this motor through a "certain angle" causes a vertical upward or downward movement of the This regulating cylinder causes piston. This has, if the pressure chamber of the regulating cylinder is isolated from the pressure medium source, a movement of its cylinder body by the same amount and thus a Movement of the two plunger cylinder pistons result. As a result of the effects caused by the reduction gear Reduction, this movement is very slow.

If, on the other hand, the electric motor is at a standstill, the cylinder body of the regulating cylinder can also pass through

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Feeding an additional amount of print media in which Pressure chamber are moved. This movement, by the way going at great speed has movement the piston of the two plunger cylinders and thus the press cylinder result

To connect the two sides of the straightening machine, the two drive shafts are fitted with reduction gears provided electric motors of the machine are arranged in a line and is essentially in the middle the common shaft formed in this way, a coupling of known design is used, so that the electromechanical drives on both sides of the machine can be rigidly coupled to one another or from one another, if required can be separated.

Further features of the invention emerge from the following description of a preferred exemplary embodiment, which is shown on the accompanying drawing. This drawing shows:

1 shows an overall view of a BI-straightening machine according to the invention.

Figure 2 is a side view of one of the four press brackets of the machine. .

3 shows a perspective view of the electromechanical cylinders connected to the regulating and immersion cylinders Device for operating the machine.

Fig. 4 is a diagram of the device for feeding a the regulating cylinder with pressure medium.

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Pig. 1 shows the upper frame 1 and the lower frame 3 of the machine as well as the upper set of rollers 2 and the lower set of rollers k-,

The brackets 5 connect those provided on the racks Approaches in pairs with each other and carry the cylinder body 7 of the press cylinder.

The impression cylinders 18 are fed from an independent pressure medium source 19 via a high-pressure-resistant line Zk.

Furthermore, electric fieguliermotoren 15 and Immersion cylinder 11 is provided. The cylinder bodies 7 and 11 are connected to one another by a high-pressure-resistant line 25 tied together.

On Fig. 1 is also one of the photoelectric Devices 21 shown, which are used for the automatic control of the machine and one at the sheet metal inlet and the other is arranged at the sheet metal outlet.

In the lower part of the bracket 5 is a flat 6 is provided, on which the cylinder body 7 of the press cylinder optionally via a cylindrical Intermediate part Io rests. Such an intermediate piece is also at the support point between the approach of the upper frame and the upper cross member of the Bracket 5 is provided.

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Between the piston 8 of the press cylinder and the approach of the lower frame on which this piston Exerts pressure, a cuboid intermediate piece 9 is used.

The two motors 15 each act on an angular reduction gear 1Λ. These two units can be connected to each other by a coupling 1.6.

The upper part of each piston 13 of the regulating cylinder 17 is provided with an external thread so that it can be actuated by the output pinion of the reduction gear I ^. The cylinder body 17 is on. of the plate 26, which in turn is attached to the upper ends of two pistons 12 on the same side of the straightening machine arranged immersion cylinder 11 is attached '. Each drive motor 15 thus actuates a pair of plunger cylinders 11.

A nut 27 is provided on each piston 13, which forms an adjustable stroke limiter stop.

A pressure source, for example the source 19 », feeds the two regulating cylinders of the system via one Line 28. In this line, a throughput controller 2o be provided. By means of solenoid valves 22 pressure medium can be supplied by remote control or the Plant to be connected with the atmosphere. The solenoid valves can be controlled by a timer 23 on which a photoelectric device 21 acts.

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The straightening machine works in the following way

The compensation cylinders 18 are constantly under pressure = and push the two frames of the machine apart.

The regulating cylinders 17 are also permanent under pressure so that any force exerted on the pistons 13 is instantaneously applied to the corresponding cylinder bodies 17, which in this case form a solid body with their pistons, is transmitted.

To coordinate the movements of the on both Drive members arranged on the sides of the machine extend those provided in the upper ends of the pistons 13 Thread in the opposite sense. The slow pressing movement is now obtained by placing the two; n parts of the Regulating system, each of which remains driven by its own motor, can be decoupled.

The two motors set the corresponding shaft halves in opposite rotations, whereby as a result of the two provided on the piston rods, running in opposite directions threads a movement of these two pistons 13 in the same direction (upward or downward movement) results.

Should the upper frame of the straightening machine change its alignment with respect to the lower frame be pivoted slowly, only the two drive shaft halves have to be coupled together, see above that they are rotated at exactly the same speed. In this process, of course, the

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Direction of rotation of one of the motors in relation to its direction of rotation be reversed in the pressing operation described above. As a result of running in the opposite direction Threads move the pistons 13 now in opposite directions, but by the same amount.

Just like the previously described movement during the pressing process, this pivoting is slow For reasons of symmetry, the pivot axis of this pivoting is parallel to the axis of the rollers and is located exactly in the center plane in which the axes of the upper rollers are arranged.

To insert a sheet into the machine, the upper frame on the corresponding side must be lifted and then to close again over the inserted sheet metal. It is important that the upper frame in its movements it assumes exactly the position which it assumed after it was carried out in the manner described above Empty setting (slow parallel displacement and slow transverse swiveling) took. The pivoting to introduce the sheet is done only by actuating the regulating cylinder 17, which is attached to the side of the straightening machine on which it is to be opened. The frame opens through the effect of the impression cylinder, which is constantly under pressure l8, as soon as the counteracting, by the press cylinder 7 »i.e. by the on the same · Machine side located cylinder 17 on the bracket 7 force is canceled. This cylinder 17 is

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this is connected to the atmosphere, so that the flasks 12 of the tauoh cylinder 11 pushed out without resistance can be. From that point on, the pistons will 8 the cylinder 7 under the pressure of the cylinder 18 pushed into their cylinder body. This will the pressure medium is pressed into the pressure chamber of the cylinder 11, the piston 12 of which is now pushed out so far until the plate 26 on the stroke limiting nut 27 bumps. The straightening machine is now open.

For returning the upper frame after opening In its starting position, only the pressure chamber of the cylinder 17 is in again with the pressure medium source To connect. . .

As already mentioned, this quick pivoting movement can be done comfortably via solenoid valves 22, which are combined with a timer 23 that by a photoelectric device 21 is controlled.

With the help of the cylindrical spacers Io. can be the approaches of the frames sitting in the brackets be automatically brought back into line.

The machine is designed to be absolutely symmetrical, so that the sheets are passed through in both directions by swapping the input and output can" . . . .

The straightening machine according to the invention also offers the possibility that the upper frame for the purpose of For cleaning or to check the rollers

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and can be held in this position. This is done proceeded as follows:

First, the upper frame is brought close to the lower frame by all of the impression cylinders 18 be connected to the atmosphere. Because the two cylinders 17 are also not under pressure, · can then the pistons 3 are pushed into the cylinders 7 and thereby push the pistons of the plunger cylinders 11 upwards. As a result, the cuboid Intermediate pieces 9 are removed so that the upper frame when the impression cylinder 18 xvieder be put under pressure while there is no pressure in the cylinders 17, all the more so with respect to its normal position can be lifted off, the greater the height of the spacers removed.

To relieve the cylinder 18, the upper frame can be used for cleaning or inspection during the entire process required time to be held in this position by means of appropriate spacers;

The hydraulic actuation of such a device allows safe and accurate operation, In all operations to be carried out, the Both roller groups are absolutely parallel, since each time you return to the starting position after swiveling got back.

In addition to the mechanical reduction through the reduction gear of the motor one obtains a hydraulic reduction, which is due to the differences in the

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Cross sections of the cylinders 11 and 7 is effected. Further the time for carrying out the various operations can be set using the flow rate controller 2o will.

Momentary overloads can be caused by the hydraulically operated counter-forces without any risk Device to be caught.

By simple pressure measurement, the pressure and so that the forces occurring during a work step are included Accuracy can be determined.

The invention is not restricted to the exemplary embodiment described above.

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Claims (10)

-13-P a t ent ans ρ r ü c h eg 1. Press and. Regulating device? for sheet leveling machines, whose rollers are divided into two superimposed tracks, which are from an upper frame and be carried on a lower frame, thereby marking g e t that these two frames (1,3) are connected by brackets (5) at the outer ends the straightening machine are attached, the frames can be pressed together by means of working cylinders (7), the so-called press cylinders, which between each bracket and one (3) of the racks essentially arranged perpendicular to the plane of the roller tracks (2, ^) are. 2. pressing and regulating device according to claim 1, characterized in that the cylinder body (7), each press cylinder through a high-pressure-resistant line (25) with the cylinder body (11) one Working cylinder of small cross-section and large Hub connected 1st. 3. pressing and regulating device according to claim 1 or 2, characterized in that the Piston rods (12) of the working cylinder (11), which the pressing cylinders arranged on the same side of the straightening machine (7), firmly connected to each other and by the same motor (15) with reduction gear (1 * 0 are controlled, with a motor with reduction gear the press cylinder (7) arranged at the sheet metal inlet and another one arranged at the sheet metal outlet Press cylinder controls. Documents (Art. 7, Paragraph 1, Paragraph 2, No. 1, Clause 3 of the Ariderungsges. V. 4. fc ι? JA 909816/0161 52867 4. Pressing and regulating device according to one of the preceding Claims, characterized in that the two of the motor (15) and the reduction gear (16) Existing drive groups can be coupled with one another in such a way that they rotate at exactly the same speed, and that the movements of each Working cylinder group move at the same speed, but do it in the opposite direction. 5. pressing and regulating device according to claim 1, characterized g e k e η η ζ e i c h η e t that the straightening machine still has additional working cylinders (18), the so-called compensating cylinders, which are located between the frames (1,3) are attached and their effect opposes the force pressing the two frames against one another is. 6. Pressing and regulating device according to one of the claims 1 to 5 »marked by this, that the compensating cylinders (l8) are fed independently. 7. pressing and regulating device according to one of claims 1 to 4, characterized geke η η ζ eich η et that each of the motor (15) and reduction gear (l6) existing drive group, the piston rod (13) of an additional working cylinder (I7) for rapid Tilting _: movement actuated, the body (17) with 'the piston _; rods (12) of the working cylinder (11) succeed in cross-section and large stroke forms a block. 8. Pressing and regulating device according to one of the claims 1 to 4 and 7, thus g e k e η η ζ e i c h-: net, that the working cylinders (I7) are fed via a flow controller (2o) for rapid tilting movement. 9098 16/0161 U52867 9. Pressing and regulating device according to one of claims 1 "to ^ and 7> thereby g e k e η η ze 1 chnet that the feeding of the work cylünder (17) for rapid tilting movement is controlled by a timer (23), which itself by two photoelectric barriers (21), which are darkened during the sheet metal passage, controlled 1st. 10. pressing and regulating device according to claim 1, characterized in that cylindrical disks (lo) the alignment of the bracket (5) ensure that the parts are located. 909816/0161