DE3218553A1 - Method and device for rolling out small batches of individual plates or sheets - Google Patents

Abstract

In this method and the devices employed, the plates or sheets are straightened after leaving the roll gap on a roller table (which can be moved up and down) by flexible straightening elements controlled by the plate itself, moved into the correct position and fixed by movement rollers brought into engagement, held and raised by holding arms and transported back to the front end of the rolling installation by means of these movement rollers, taken over by acceptance rollers and brought back correspondingly into the original position and fed continuously to the roll. An example of a device for carrying out the method is shown particularly clearly in Fig. 1. <IMAGE>

Description

Self-employed lifting device

for rolling out individual sheets and panels of special quality with low number of items.

As is well known, sheets are rolled out on modern strip rolling mills, laterally trimmed and finished automatically on assigned cutting devices tailored.

Such manufacturing methods and facilities for this are suitable for common repeating groups of sheets and panels.

Meanwhile, z. 13. in the aluminum sector and non-ferrous metal sector and the steel sector and otherwise, material panels, also certain alloys or composite materials of precise quality assurance, which for various reasons does not in the very common way - in relatively large bars - poured, rolled out and can be cut because, among other things, not the required larger amount is desired and such silver-sized specified storage is not economical is feasible.

One is then forced to roughly preprocess these sheets or panels Condition from the delivered stack, individually to the roll stand, as before, manually to feed, being in front of the work rollers on the front roller table and behind the rollers on the rear roller table, left and right of the roller tables each one man, so a total of four men are required.

The rolling stock is therefore fed to the roller by hand and picked up at the rear and passed over the top roller to the front, there removed again and to the next Stitch fed to the roller, etc., until the desired sheet thickness is reached.

This high manual and tiring effort often makes it not possible, profitable on the special wishes of the customer for small quantities enter into.

According to the method and devices according to the invention, the sheet metal according to self-controlling certain adjustable work processes by means of special Devices again mechanically after the rolling process from the rear of the rollers mainly passed over the top roller forwards to the next roller pass.

So you can get by with at least half of the operating staff and, thanks to the evenly achievable work rhythm, one can also die Increase the number of stitches and make this production profitable.

In Figs. 1-5 are possible embodiments of the mechanical and controlled rolling process with associated equipment and devices shown schematically. It shows: Fig. 1 a side view of a rolled layer Fig. 1 is a plan view of Fig. 1 Fig. 3 is a side view of the front rear roller table the system according to Fig. 1 Fig. 4 is a side view with the lifting table in an inclined position Fig. 5 is a side view with the crank mechanism assigned practically in the middle of the lift height In Fig. 1 is shown the lower roller (1) and upper roller (1 '), as well as the associated one front roller table (2) and the rear roller table (3) with the high controllable upper part (3 /). The rolling stock (4) with its front edge (4) and v the rear edge (4) is put into the rollers for rolling and comes after (4) on the rear one Roller table top (3 /).

For safe transport of the rolling stock are in the rear upper part of the roller table (3 /) Pairs of motion rollers (6a-6b) arranged between the rolling stock (4 /) at Leaving the roller gap (Sp) runs into it and which is different in time or place adjustable release close when the sheet metal (4 /) with its rear edge (4 ') has left the nip (Sp) h.

Should the metal sheet (4 /) with its rear edge (4 /) not h enough be away from the nip (Sp) so that it is safely past the roller diameter (D), can be raised, so transport these motion rollers, through the rear Sheet edge (4 ') controlled, automatically the sheet (4') around the h necessary piece continue from the roller to (9 /).

The sheet is then expediently parallel to the rolling direction and table axis aligned by one in the table accessing the center from left and right elastic alignment device (13), the z. B. designed scissors-like directional and can be controllable. Then are on both sides of the roller table upper part (32) adjustable controllable holding arms (5) attached, which are beak-shaped and be used to hold the rolling stock (. The Design of these holding arms can, as indicated in Fig. 3 with (5), beak-like pivotable against the rolling stock or one that grips vertically against the sheet metal from above, be like (5). You can also use 2 crosswise holding brackets (5) bring.

3 The lifting process can then begin. Assume that the return of the rolling stock over the top roller - as was customary in the past by hand - is to take place, the sheet is moved from the lifting table to the upper position (4 ") brought. After reaching this position, these movement roles transport in Rotation offset, the rolling stock over the top roll (1t) back to the front the rolling mill.

In order to make the transport process completely safe, z. B.

a pair of takeover roles (7a - 7b) are assigned between the the rolling stock, coming in its highest position from the lifting table, for example before it runs in the steering skids (8). These sheet metal takeover roles (7a - 7b) - after an adjustable, suitable transport path of the sheet (4 ") during return transport - controlled by the front or rear sheet metal edge (4 "- 4), with the necessary v h Circumferential speed set in rotation, under pressure against each other moved, used for takeover and transport, while the movement rollers (6a -6b) can cease to be in force. In any case, this is how the return transport of the rolling stock is safe on the front of the rollers and the sheet removal for the next work step d. H. Stitch initiated.

The lifting of the rear roller table (3 /) to (3 ") can be done on the take place in various ways, for. B. by parallel controlled lifting cylinders or by crank or cam drive.

It appears expedient to use a crank drive, as shown in Fig. 5 shown. There are crank arms (18) whose pivot point (19) is practically in the middle of the lifting height (H) is used. This causes the rear edge of the sheet to move (4h) h in any case past the roller diameter (D) upwards.

Furthermore, reversible 'cranks, including cam and pulley discs, the possibility of better control of the dwell time in the lower or upper lifting table position. The fixed points of the crank drives or lifting systems can of course also at a different height than in the middle of the table stroke (H), as shown in Fig. 5, be arranged.

So that the lifting of the lifting table including the rolling stock (3 and 4 'is easy takes place with little effort, for example, counterweights (20a) the lifting table (3,), as indicated in Fig. 1, via pulleys (21) or otherwise appropriately assigned. You can also use the crank (18), Fig. 5, at (22) adjustable counterweights (20b) are used, so that "in any case the table lifting forces become small and the construction including the guidance of the control and movement elements can be designed structurally more easily and practically only Movement forces are necessary.

Because of the mechanical-automatic sheet lifting device that Stitch sequence is increased significantly (precise sheet return), certain Sheets by their own energy - especially if this is on the rear roller table run horizontally on assigned roles or role groups - tend to they move too far away from the roll gap (Sp) when they run out, if they are not enough be braked by taking these rollers and swivel castors with you. For precise The sheet metal can be stopped by braking rollers, one or more pairs of rollers (10a-lOb) on the roller table adjustable as a braking element, the upper one by a Torque lowering device against the lower, analogous to the pair of rollers (6a and 6b), are moved. This is due to the arrangement of the rollers in the front end at (11) of the rear roller table (3 /) a damming effect on the sheet metal is avoided and it comes to a calm stop.

The braking effect of the rollers must be adjustable. Furthermore, one arranges the braking rollers expediently in the front longitudinal center at (12) of the area (11) from the roller table (3 '), so that there is no shearing moment on the sheet metal when braking occurs.

You can also go over to stop the sheet outlet by that the roller table itself is additionally assigned a moment-lifting mechanism, such that an inclined plane is created on which the rolling stock after leaving the Nip (Sp) opens and brakes itself, see Fig. 4.

The moment lifting device (15), which z. B. an inner roller table (3 /) quickly tilts, it is sensible to use the rear edge (4 ') of the sheet (4) h controlled and is locally adjustable in time to return to the starting position after this possible solution.

However, this method can also be used analogously with devices apply to the rolling stock on the front of the roller - coming from the rear - pick up, lower and feed back to the roller for the next pass, so, that a largely mechanically controlled rolling process for special sheets in small series is made possible according to the invention.

In order to ensure that the raw sheets are fed in with the quick stitch sequence that is possible (23) and the removal of the finished sheets (24) safe, practical and economical To design, one assigns the front (2) and the rear (3) roller table high control and Absenicbaren such pallet tables (25) so that it is always possible to use the top one The surface of the raw sheets and finished sheets is practically at the same height as that of the roller tables (2) or (3) to hold. This enables the sheets to be fed to the roller table (2) and the removal of the metal sheets from the roller table (3) can be designed in a simplified manner. it mechanically or by hand.

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Claims (8)

P A T E N T A N S P R lt C H K S Process for rolling sheet metal and other panels with sheet return to the front of the roller for the next roller pass, characterized in that the panels after leaving the nip on a up and down movable roller table, self-controlled by the table, elastic Alignment elements aligned by engaged motion rollers in the is brought into the correct position and fixed, held by holding arms and lifted up and transported back to the front of the rolling mill by means of these movement rollers and is taken over by takeover roles and analogously in iiU original situation brought back and continuously fed to the roller. 2. The method according to claim 1, characterized in that the metal sheets after leaving the nip on the roller table on a highly controllable table part automatically stopped by the controllably adjustable elastic alignment elements aligned and by means of the controlled movement rollers in the correct longitudinal position brought and fixed and held and lifted in this by controlled brackets and transported back to the front of the rolling mill by the movement rollers and taken over by the controlled takeover roles located in the upper position is, and that these work processes in an expedient manner, temporally locally adjustable, can be controlled by the sheet metal itself and its sheet metal edges. 3. Device for performing the method according to the claims 1. and 2., characterized in that the rear roller table (3) has an upper highly controllable Part (3) is assigned to the controllable sheet metal holder (5) and controllable transport rollers (6a - 6b) are assigned, and that this movable high and low controllable Part (3 /) including sheet metal t4), counterweights (20a) are assigned, in such a way that practically only movement forces are required to lift the sheet metal. 4. Apparatus according to claim 3, characterized in that the Sheets from a lifting table by means of a crank drive, the radius of which is practically the Half of the lifting height (H), aligned - fixed and held, and for return transport be pivoted to the front of the rolling mill in a suitable height, wherein the crankshaft drive balancing weights (20b) are assigned, so that practically only Movement forces are required to return the sheet metal. 5. Apparatus according to claim 4, characterized in that the Fixed point of the crank mechanism for swiveling the lifting table with sheet metal (4) is arranged practically in the middle of the lifting height (H). 6. Device according to at least one of these claims, characterized in that that the roller table (3 - 3 /) upper and lower brake rollers or bromine roller groups (1 0a lOb) are assigned and that these are near the central axis and in the front Part of the end (11) of the roller table (3, 3 ') lie, their braking effect controllably adjustable is and that their use according to their position (12) through the sheet () or whose sheet metal edges are controlled. 7. Device according to at least one of claims 3-6. characterized in that the height of the controllable rear The roller table (3) is also swiveled in an inclined position in relation to the outgoing sheet metal can be achieved by a torque lifting device assigned to the rear roller table part (3 /) (15) and that this is controlled by the sheet leaving the nip itself and that the pivoting about a pivot point (16) in the vicinity of the nip (Sp) takes place on the rear roller table. 8. The device according to at least one of claims 3 - 7, characterized marked that the front (2) and / or rear roller table (3) in the altitude such controllable sheet metal stacking tables (25) are assigned that the upper sheet metal layer height (23 - 24) in front of the front roller table (2) and or behind the rear roller table (3) practically at the same height as that of the roller tables (2 or 3), controllably durable is.