EP0838277B1 - Leveller for levelling strips to be fed to the entrance of a press - Google Patents

Abstract

The apparatus for straightening strips (preferably those made of metal) fed to a press incorporates bottom and top straightening rolls (9-13; 5-8). The strip is fed through these rolls and straightened in the process. The apparatus is characterised by the fact that several top straightening rolls (5-8) are held at a straightening ram (14) which is adjustable in the direction of the bottom rolls (9-13) by means of an adjustment device (15).

Description

The invention relates to a straightening device for straightening from the entrance of a press to the belts after the Preamble of claim 1.

With such straighteners, it is common to use the upper straightening rollers against the lower straightening rolls. Here become the upper straightening rollers on the inlet side of the straightening unit usually set lower than on the outlet side of the straightening unit.

Straighteners are known in which the upper straightening rolls to change the employment of the same to the lower one Straightening roles individually with regard to their positioning in the Position can be adjusted.

GB-A-2 062 513 shows a straightener according to the preamble of claim 1, the upper straightener rollers are attached to the straightener bear. An inclination of the straightening bear is achieved in that the the straightening mechanism also employing drive devices or their drive spindles in different basic positions to be spent, the actual employment of the directional bear then from these different ones Basic positions of the drive devices are carried out. In addition, in the case of the known from GB-A-2 062 513 Straightener essential components of the drive equipment of the straightener bear susceptible to contamination and not very easy to maintain within the frame construction of the straightening unit.

The invention has for its object a straightener for Straightening strips to be fed to the entrance of a press, preferably metal strips to create, in the case of simplified constructive structure of the straightening unit essential the synchronization of the adjustment of the Components serving the straightener bear are less susceptible to possible dirt and easier to maintain are.

This object is achieved by the features in Claim 1 solved.

Since the straightener bear on his in the direction of the Straightener front and rear end section by means of each two straps linked to it, each with one Truss is connected, the two trusses Hold the carrier in an articulated manner, the Straightening position of the upper straightening rollers held on the straightening bar in a simple way to different operational requirements are adjusted to that of possible Truss stroke on the inlet side of the straightening unit and the Traverse arranged on the outlet side of the straightening unit changed or is converted.

For changing or adapting the vertical truss stroke shows each crossbeam on their cover plate facing outer surface two bevels, between which and the straightener cover plate each an adjustable Wedge gate valve is arranged. By adjusting the between the traverse and the straightener cover plate arranged Wedge gate in one direction or the other can be reduce or enlarge the possible truss stroke. This Adjustment or adjustment of the truss stroke can be done for the one on the inlet side of the straightening unit and the one on the Traverse provided on the outlet side of the straightening unit separately make. Due to the bevelling of the crossbeam facing inclined surfaces of the wedge gate valve results in the position of the straightening bear or the The straightening bar arranged one upper straightening rolls flat support between the traverse and the two her assigned wedge gate valves, both for the inlet side as well as the traverse on the outlet side.

Since the crossbeams are arranged above the leveling plate their correct positioning when reaching the Straightening or positioning position of those held on the straightening device bear upper straightening rolls are checked, being beyond the maintenance of the between the leveling plate and the Truss provided components is much easier.

According to the invention, there is a device-technical separation between the lifting movement of the straightener for the purpose of employment the same to the lower straightening rolls and a separate one Adjustment of the trusses holding the straightener bear in provided for the straightener cover plate. At the straightener according to the invention, the trusses in relation adjusted on the straightener cover plate, this adjustment the trusses are made in the vertical direction. A Adjustment of a traverse in the vertical direction to the leveling plate towards or away from the straightener cover plate correspondingly with the other in a constant position Traverse resulting in an inclination of the straightener bear.

A further simplification results if all upper straightening rollers of the straightening unit arranged on the straightening unit bear or held.

An even and therefore particularly advantageous distribution the actuating forces of the adjustment device can be reached, if the adjustment device is arranged in the center of the straightening bar is.

The adjustment device can advantageously be a hydraulic cylinder or be designed as a lifting spindle unit.

To in different positions of the straightening bear an even and undisturbed power transmission from the To ensure adjustment device on the straightening bar it is advantageous if the adjusting device is a pressure piece has that against a mounted on the straightening bear Pendulum plate rests, and the pressure piece and the pendulum plate at the mutually assigned contact surfaces in the direction of flow of the straightener with the same radius of curvature are concave or convex or convex or concave. In each line of sight or straightening position, the one held on the straightening bar upper straightening rollers is such a full-surface system between the mutually assigned contact surfaces of the adjusting device Thrust piece and the directional bear side Pendulum plate and thus an even application of force guaranteed by the adjustment device on the straightening bar.

The truss stroke can advantageously be used for both trusses can be adjusted separately.

For the correct positioning of the trusses on the straightening unit it is expedient if each traverse is attached to the Straightener cover plate fixed guide column in vertical direction to be led. The guide pillar should advantageously be arranged centrally with respect to the traverse.

About the adjustment of the wedge gate valve and thus a change or adjustment of the vertical truss stroke in simple In order to be able to accomplish this, the two should be one Traverse associated wedge slide each have a nut and be adjustable by means of a threaded spindle.

In an advantageous embodiment of the invention two bevels provided on the lower surface of the crossbeam formed in opposite directions, the threaded spindle speaking has two opposite thread sections. At a rotation of the threaded spindle with a direction of rotation the two wedge slides move towards each other to or away from each other so that they are at the same vertical level arranged support surfaces for the bevels of the train the traverse assigned to them.

It is possible to drive the threaded spindle by motor. Alternatively, the threaded spindle can also be operated manually become.

About the displacement of the wedge slide and thus the adjustment vertical truss stroke, it is advantageous to if the straightener cover plate in the lifting range of the each wedge slide has a sliding system.

To guide the straightener bear within the straightener it is advantageous if on in the direction of the straightening unit a sliding device at the front and rear end of the straightener bear arranged with a guide device, which is formed on the straightening unit, cooperates. In cooperation with the trusses leading vertically Guide columns and the articulated connection of the trusses with the straightening bar by means of the carrier can thus in different positions of the The straightening bar held the upper straightening rollers the movement from the release or rest position of the trusses, the Richtwerkbärs and the upper straightening rolls in their Anstellbzw. Alignment position with exact guidance of the crossbeams and the directional bear.

The guidance of the straightening device can be advantageously in different straightening or positioning positions or the upper straightening rollers held on it, if the slider on the two in Direction of travel of the straightener front and rear ends each of the straightening bear preferably a hardened slider has, the corresponding areas of the frame of the straightening unit, preferably a hardened guide piece assigned.

The sliding pieces arranged at the front end of the straightening unit can advantageously on a bracket of front upper straightening roll and the one at the rear end of the Straightener bear arranged sliders on a bracket the rear upper straightening roller.

If the sliders on their associated guide pieces facing contact surface in a radius of curvature are curved, preferably the one Corresponds to the radius of curvature that the pendulum plate or have the thrust piece, the straightener can in any position from the rest or release position to his The straightening or setting position can be adjusted without the components moving relative to each other occur.

In a further advantageous embodiment of the invention can be used for vertical stroke limitation or adjustment of the trusses, two vertical spindle drives per truss or two screw jacks coupled together provided on the entry and exit traverse his.

Alternatively, it is also possible to limit the vertical stroke a cross eccentric shaft to provide.

To a when starting from the straightening or starting position to ensure vertical arrangement of the trusses it is beneficial if on the top of the truss Synchronizer brackets are arranged, by means of which both Trusses can be aligned in the same vertical level on the straightening unit are.

In this case, each crossmember can advantageously have two Synchronizer holder must be assigned.

In order to dampen the stresses on the trusses, it is advantageous if each synchronism holder by means of is compressed by a compression spring.

If the straightener according to the invention during the introduction the beginning of the band in the closed straightening unit, i.e. in the straightening or position of the straightening bear or the upper straightening rolls held on him, difficulties arise can the straightening mechanism in a simple way within can be opened for a maximum of two seconds.

The through the hydraulic cylinder or the lifting spindle unit applied and to the straightening bear or to the latter held upper straightening rollers transferable adjusting forces are so big that the beginning of the band, similar to under a press that can be set up.

If the run of the strip to be processed in the direction of flow through the straightening mechanism or offset by 90 degrees to this Direction of flow must be corrected, that can Straightener can be lifted quickly in the millimeter range. If, for example, it is designed as a feed straightener Straightener according to the invention immediately before a Press or a punch press is arranged and this or this with e.g. fifty feeds per minute and feeds a feed length of 100 mm of strip material it is possible, with each press or punching machine stroke Upper straightening rollers arranged hydraulically on the straightening bar to air. The band can break in any decline Press or the punching machine by means of one in the tool intended catcher are pulled into the correct position, before the tool engages with it.

In the embodiment of the straightener according to the invention the straightening rollers can be cleaned quickly and thoroughly to be serviced otherwise.

All components of the straightener according to the invention can can be produced with comparatively little effort. In this regard, it should be noted that the upper Straightening rolls traditionally, i.e. at from the state of the Technology known straighteners, by means of four lifting spindle elements be carried out, two of which are on the inlet side of the straightening unit and two on the outlet side of the Straightener are arranged; the two on the inlet side of the straightening mechanism are arranged with each other coupled; the same applies to the two on the outlet side of the straightening mechanism arranged lifting spindle elements. Ventilation of the upper straightening rollers in such a design Straightening is not possible or at least only possible if the lifting spindle elements are technologically extreme elaborate and therefore costly ball screws have, then a significant control effort for the targeted and desired synchronization would be added. The constructive-technological effort for employment in such designed conventional straighteners leads in Compared to the straightening device according to the invention for a four times greater costs.

The arrangement of the wedge gate valve or the other components limiting the truss stroke above The straightener cover plate is possible with regard to Soiling is particularly advantageous and therefore easy to maintain, in addition also occupational safety of the straightening device according to the invention compared to conventional Straightening is thereby increased considerably.

In certain embodiments of the invention Straightening unit it makes sense to also have an upper feed roller to hold at the straightening bear. The same applies to, if available, an upper pull-out roll. Such an embodiment is particularly in connection with feed straighteners and so-called compact systems advantageous. The move-in and Pull-out rollers can with regard to their outer diameter also be bigger than the straightening roles. When a such feed straightener e.g. the entrance area is assigned to a press, all of its top Roles, i.e. his straightening rollers, the top feed roller as well If necessary, vent the upper pull-out roller as soon as a catcher of the upper tool of the press when it goes down Punching strips positioned. Such a feed straightener the tape to be fed to the press would be from an unwinder fetch, then dock on the frame of the press and then automatically lock hydraulically.

An expedient development of this embodiment of the Straightener according to the invention results when the upper Feed roller and / or upper pull-out roller can be adjusted separately is or are, whereby to employ the upper Feed roller and / or upper pull-out roller preferably one Pneumatic or hydraulic cylinders can serve.

Each intended for the feed and / or pull out roll Pneumatic or hydraulic cylinders can be conveniently controlled by a proportional pressure control valve become.

In the following, the invention is illustrated by an embodiment explained in more detail with reference to the drawing.

Figur 1

eine Prinzipdarstellung im Längsschnitt durch eine Ausführungsform des erfindungsgemäßen Richtwerks; und

Figur 2

einen Querschnitt durch das in Figur 1 dargestellte erfindungsgemäße Richtwerk.

Show it:

Figure 1

a schematic diagram in longitudinal section through an embodiment of the straightener according to the invention; and

Figure 2

a cross section through the straightening device according to the invention shown in Figure 1.

An inventive shown in Figures 1 and 2 Straightener 1 serves to tape, in particular a metal tape, to be taken up by a processor, to be straightened and a downstream processing machine, e.g. a press or a punching device.

Here comes a tape, not shown in the figures through a feed area 2 of the straightening unit 1, to which one upper feed roller 3 and a lower feed roller 4 between upper straightening rolls 5, 6, 7, 8 and lower straightening rolls 9, 10, 11, 12, 13. Between the top and bottom Straightening rolls 5 to 13 will be the tape that is usually used is a metal band, directed.

The upper straightening rollers 5, 6, 7, 8 of the shown in the figures Straightener 1 according to the invention are common held on a straightening bar 14. The straightening bear 14 and thus the upper straightening rollers 5, 6, 7, 8 are by means of one in the illustrated embodiment as a hydraulic cylinder 15 trained adjustment device to the lower Straightening rollers 9, 10, 11, 12, 13 adjustable.

The hydraulic cylinder 15 has a pressure piece 16, which with a pendulum plate 17 arranged on the straightening bar 14 for Movement of the straightener bear 14 from one in FIGS and 2 retracted position in the vertical direction in an adjustment or shown in Figures 1 and 2 Straightening position serves.

On their contact surfaces in contact with each other are both the pressure piece 16 and the pendulum plate 17 curved in the direction of travel of the straightening unit 1 designed, the hydraulic cylinder-side pressure piece 16 a concave and the pendulum plate on the side of the straightening bear 17 has a convex curvature.

The hydraulic cylinder 15 is fixed to a leveler cover plate 18 supported. With regard to this straightener cover plate 18 is the straightening device 14 in the vertical direction in the Figures 1 and 2 for the employment of the upper straightening rollers 5, 6, 7, 8 to the lower straightening rollers 9, 10, 11, 12, 13 movable.

The curved configuration on the contact surfaces of the pressure piece 16 and the pendulum plate 17 is required to also then an adjustment of the straightening device 14 in an exact manner to allow when the distance between the top and lower straightening rollers at the entrance to straightener 1 this distance at the exit area of the straightening unit 1 varies.

The rectangular Richtwerkbär 14 is the input side of the Straightener 1 articulated on its two corner areas two brackets 19 hung, which with their straightening bear 14 opposite end also articulated on one Traverse 20 are supported. Correspondingly, the Straightener bear 14 on the outlet side of straightener 1 a traverse 21 suspended.

The crossbeams 20, 21 are fixed to the leveling plate by means of 18 attached guide columns 22, 23 in the vertical direction guided. The guide columns 22, 23 extend vertically upwards from the leveler cover plate 18, so that the trusses 20, 21 above the leveling plate 18 are arranged. Accordingly, the Straightener cover plate 18 one for each girder or one cross member 20, 21 two openings 24 through which the carrier 19 at the inlet end of the straightening unit 1 or in the Figures not shown carrier at the outlet end of the straightening unit 1.

The lifting stroke of the crossbeams 20, 21 when the Richtwerkbärs 14 in the position of the upper straightening rollers 5, 6, 7, 8 can be in the following described way for each traverse 20 or 21 separately to adjust. This is done to avoid repetitions Description only for the one shown in FIG. Traverse arranged on the inlet side of the straightening unit 1 20th

The crossbeam 20 is on its leveling plate 18 facing Lower surface with two opposite bevels 25, 26 designed. The movement of the traverse 20 in Direction towards the cover plate 18 is by two Wedge slide 27, 28 limited against which the bevels 25, 26 come into contact when the traverse 20 during the positioning stroke of the straightening device 14 in the vertical direction downwards in the straightening position shown in Figure 2 is moved.

The wedge slides 27, 28 are at their bevels 25, 26 assigned outer surfaces designed accordingly obliquely.

Each wedge slide 27, 28 has a nut 29 and 30, respectively on the fixed with the wedge slide 27 assigned to it, 28 is connected and in turn on a threaded portion 31 or 32 of a threaded spindle 33 is seated.

The two threaded sections 31, 32 of the threaded spindle 33 are trained in opposite directions; the two nuts 29, 30 sit due to their fixed attachment to the wedge gate valves 27 or 28 rotatably and in the axial direction of the threaded spindle 33 movable on the opposite thread sections 31 and 32 respectively.

The threaded spindle is in both by means of a motor 34 Directions rotatable. When the threaded spindle rotates 33 the wedge slides 27 move in one direction, 28 in Figure 2 away from each other when the threaded spindle rotates 33 in the other, opposite direction the two wedge slides 27, 28 move towards one another. When the wedge slides 27, 28 move towards one another in the position of the straightening device 14 achievable distance between the traverse 20 and the straightener cover plate 18 enlarged so that the distance between the upper leveling roller 5 and the lower leveling roller 9 in the inlet area of the straightening unit 1 is enlarged. If the Wedge slide 27, 28 by a different direction of rotation the threaded spindle 33 in FIG. 2 are moved away from one another, the corresponding distance between the Traverse 20 and the straightener cover plate 18, so that the distance between the upper straightening roll 5 and the lower one Straightening roller 9 on the inlet side of the straightening unit 1 reduced becomes.

To reduce wear and make it easier the directional cover plate has the rotational movement of the threaded spindle 33 on their associated with the wedge slides 27, 28 Areas of sliding inserts 35 and 36 respectively.

The straightener bear points at the inlet side of the straightening unit 1 14 or the bracket of the upper one fixed to it Straightening roller 5 on two side sliders 37, correspondingly at the corner areas of the straightening device on the outlet side 14 or the holder of the upper straightening roller 8 two Sliders 38 are provided.

Each slide 37 or 38 is a guide 39 or 40 assigned, which at a corresponding point in Frame of the straightener 1 is arranged. Both the four Sliders 37, 38 as well as the four guide pieces 39, 40 are hardened. On their opposite Contact surfaces are the sliders 37, 38 and Guide pieces 39, 40 curved in a radius of curvature formed, this radius of curvature the radius of curvature the curved contact surfaces of the pressure piece 16 and corresponds to the pendulum plate 17. This will Straightener bear 14 also for the two trusses 20, 21 differently set positions and thus with one - seen in the direction of flow of the straightening unit 1 - Inclination of straightening unit 14 exactly in straightening unit 1 out, so that the preset straightening or turning positions the upper straightening rollers 5, 6, 7, 8 with respect on the lower straightening rollers 9, 10, 11, 12, 13 to let.

Each traverse 20 or 21 has on its the straightening plate 18 facing away from two synchronizer 41, by means of the removal of the trusses 20, 21 from the truss cover plate 18, the trusses 20, 21 in one same vertical level can be aligned parallel to the straightening device 14 are. Each synchronism holder 41 has one by one Cylinder screw 42 arranged compression spring 43 and two Spring washers 44 and 45.

As an alternative to the embodiment shown in FIGS. 1 and 2 of the straightening device according to the invention it is possible the upper feed roller 3 and, if necessary, an upper pull-out roller also to be held on straightening bar 14. The one accordingly then held feed roller or pull roller by means of a further pneumatic or hydraulic cylinder, controlled by a proportional pressure control valve is employed separately.

Claims (25)

1. Finishing apparatus for finishing strips, preferably metal strips, to be supplied to the inlet of a press, having lower (9, 10, 11, 12, 13) and upper finishing rollers (5, 6, 7, 8), between which the strip is guided through and by which it is finished, having a finishing apparatus striker (14), on which several upper finishing rollers (5, 6, 7, 8) are mounted and which is adjustable towards the lower finishing rollers (9, 10, 11, 12, 13) by means of an adjustment device (15) and whose adjustment position is adjustable relative to a finishing apparatus cover plate (18), which holds the adjustment device (15), characterised in that the finishing apparatus striker (14) is connected, at the front and rear end portion thereof in the direction of passage of the finishing apparatus (1), to a tie-bar (20, 21) by means of two carriers (19) articulated thereto, the tie-bars (20, 21) similarly holding the carriers (19) in an articulated manner, in that each tie-bar (20, 21) has, on the outer face thereof facing the finishing apparatus cover plate (18), two slopes (25, 26), between each of which slopes (25, 26) and the finishing apparatus cover plate (18) an adjustable wedge gate (27, 28) is arranged, and in that the tie-bars (20, 21) are arranged above the finishing apparatus cover plate (18).
2. Finishing apparatus according to claim 1, wherein all of the upper finishing rollers (5, 6, 7, 8) of the finishing apparatus (1) are mounted on the finishing apparatus striker (14).
3. Finishing apparatus according to claim 1 or claim 2, wherein the adjusting device (15) is arranged centrally on the finishing apparatus striker (14).
4. Finishing apparatus according to any one of claims 1 to 3, wherein the adjusting device is in the form of a hydraulic cylinder (15).
5. Finishing apparatus according to any one of claims 1 to 3, wherein the adjusting device is in the form of a displacement spindle unit.
6. Finishing apparatus according to any one of claims 1 to 5, wherein the adjusting device (15) has a pressing element (16) which rests against a pendulum plate (17), which is fitted to the finishing apparatus striker (14), and the pressing element (16) and the pendulum plate (17) are curved, in the direction of passage of the finishing apparatus (1), at the contact faces which are associated with each other with the same radius of curvature in a concave and convex manner or a convex and concave manner, respectively.
7. Finishing apparatus according to any one of claims 1 to 6, wherein the tie-bar travel is adjustable separately for both tie-bars (20, 21).
8. Finishing apparatus according to claim 7, wherein each tie-bar (20, 21) is guided, preferably centrally, in a vertical direction by means of a guiding column (22, 23) which is fixed to the finishing apparatus cover plate (18).
9. Finishing apparatus according to any one of claims 1 to 8, wherein the two wedge gates (27, 28) each have a nut (29, 30) and are adjustable by means of a threaded spindle (33).
10. Finishing apparatus according to claim 9, wherein the two slopes (25, 26) are formed in an opposing manner and the threaded spindle (33) accordingly has two opposing threaded portions (31, 32).
11. Finishing apparatus according to claim 9 or claim 10, wherein the threaded spindle (33) can be driven by motor.
12. Finishing apparatus according to any one of claims 1 to 11, wherein the finishing apparatus cover plate (18) has a sliding insert (35, 36) in the travel region of each of the two wedge gates (27, 28).
13. Finishing apparatus according to any one of claims 1 to 12, wherein there is arranged at the front and rear end of the finishing apparatus striker (14) in the direction of passage of the finishing apparatus (1) a sliding device (37, 38) which co-operates with a guiding device (39, 40) which is located on the finishing apparatus (1) in order to guide the finishing apparatus striker (14) in the finishing apparatus (1).
14. Finishing apparatus according to claim 13, wherein the sliding device has, at each of the two front and rear corners of the finishing apparatus striker (14) in the direction of passage of the finishing apparatus (1), a preferably hardened sliding element (37, 38), with which is associated a preferably hardened guiding element (39, 40) at each of the corresponding regions of the frame of the finishing apparatus (1).
15. Finishing apparatus according to claim 14, wherein the sliding elements (37) which are arranged at the front end of the finishing apparatus striker (14) are arranged on a holder of the front upper finishing roller (5) and the sliding elements (38) which are arranged at the rear end of the finishing apparatus striker (14) are arranged on a holder of the rear upper finishing roller (8).
16. Finishing apparatus according to claim 14 or claim 15, wherein the sliding elements (37, 38) are, at the contact face thereof facing the guiding elements (39, 40) associated therewith, of curved form with a radius of curvature which preferably corresponds to the radius of curvature which the pendulum plate (17) or the pressing element (16) have.
17. Finishing apparatus according to any one of claims 1 to 8 and 14 to 16, wherein, instead of the slopes (25, 26), located on the tie-bar side, and the wedge gates (27, 28) for the vertical limiting or adjustment of the travel of the tie-bars (20, 21), there are provided at each of the inlet-side and outlet-side tie-bars (20, 21) two vertical worm drives per tie-bar (20, 21) or two coupled worm drive elements.
18. Finishing apparatus according to any one of claims 1 to 8 and 14 to 16, wherein, instead of the slopes (25, 26), located on the tie-bar side, and the wedge gates (27, 28) for the vertical limiting or adjustment of the travel of the tie-bars (20, 21), there is provided a spiral eccentric shaft in each case.
19. Finishing apparatus according to any one of claims 1 to 17, wherein there are arranged at the upper sides of the tie-bars (20, 21) synchronising holders (41), by means of which both tie-bars (20, 21) can be aligned parallel with the finishing apparatus striker (14) at the same vertical level on the finishing apparatus (1).
20. Finishing apparatus according to claim 19, wherein each tie-bar (20, 21) has two synchronising holders (41).
21. Finishing apparatus according to claim 19 or claim 20, wherein each synchronising holder (41) is spring-mounted by means of a compression spring (43).
22. Finishing apparatus according to any one of claims 1 to 21, wherein an upper feed roller is mounted on the finishing apparatus striker (14).
23. Finishing apparatus according to any one of claims 1 to 22, wherein an upper delivery roller is mounted on the finishing apparatus striker (14).
24. Finishing apparatus according to claim 22 or claim 23, wherein the upper feed roller and/or the upper delivery roller is/are adjustable separately, preferably by means of a pneumatic or hydraulic cylinder.
25. Finishing apparatus according to claim 24, wherein each pneumatic or hydraulic cylinder is controlled by means of a proportional pressure control valve.

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