EP0838277A1 - 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 tapes to be fed from the entrance of a press, preferably Metal bands, with lower and upper straightening rolls, between which the tape is passed and from which it is directed becomes.

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. They are embodiments of straighteners known, where the top straightening roles for change hiring them to the lower straightening rolls individually with regard to their positioning in the starting position be adjusted.

The invention has for its object a straightener for Straightening strips to be fed to the entrance of a press, preferably to create metal strips, by means of which the Effort to change the straightening or position of the upper straightening rolls are significantly reduced and by means of which at the same time with a simplified construction of the Straightening mechanism a faster transfer of the upper straightening rolls from their straightening or starting position to their resting or Release position is possible.

This object is achieved in that several upper straightening rolls held on a straightening device are, by means of an adjusting device in the direction of the lower straightening rollers can be adjusted. By the arrangement multiple top straightening roles on one using a single one Adjustments that can be operated by the straightening mechanism are the processes for opening and closing the straightening unit or for adjustment the upper straightening rolls from their straightening or starting position in their rest or release position considerably simplified. In addition, a single adjustment device sufficient to accommodate the multitude of on the directional bear arranged upper straightening rolls between their straightening or Position and their rest or release position to move. The relative positioning of those held on the straightener bear upper straightening rolls to each other and to their assigned lower straightening rolls can be arranged by the joint several upper straightening rolls on the straightening bar in constructive easily adhered to exactly.

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 adjusting 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 adapt the straightener according to the invention to different ones operational requirements due to different Bands or metal bands, it is advantageous if the Position of the straightener bear in relation to the adjusting device retaining straightener cover plate and thus the Position of the upper one held on the straightener bear Straightening rolls in relation to the lower straightening rolls of the straightening unit is adjustable.

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.

If 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 being the beams also articulated, the Straightening position of the upper straightening rollers held on the straightening bar in a simple way to different operational Requirements are adapted 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.

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.

For changing or adapting the vertical truss stroke it is useful if each cross beam on their the cover plate facing outer surface two bevels has, between which and the straightener cover plate each an adjustable wedge gate valve is arranged. By adjustment the one between the crossbeam and the straightener cover plate arranged wedge slide in one or the other Direction, the possible truss stroke can be reduced or enlarge. This adjustment or adjustment of the truss stroke can be used on the inlet side of the straightening unit and the one provided on the outlet side of the straightening unit Make the crossbar separately. Because of the bevels the crossbar facing inclined surfaces of the wedge slide himself in the position of the straightening bear or on the straightening bar arranged upper straightening rollers each a flat support between the crossbeam and the two their associated wedge gate valves, both for the inlet side as well as the traverse on the outlet side.

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 will.

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.

If the crossbeams are arranged above the leveling plate their correct positioning when they are reached the straightening or setting position on the straightening bar held upper straightening rolls are checked, whereby in addition, the maintenance of the between the straightener cover plate and the components provided for the truss is relieved.

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 Straightening bear and the upper straightening rollers in their 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 be.

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 proportioning 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. Of the constructive-technological effort for employment in such designed conventional straighteners leads in Compared to the straightener according to the invention, for example four times greater costs.

The in the case of an embodiment of the invention Straightening mechanism realized arrangement of the wedge slide 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 indent 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 will.

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 erfindungsgemaßen Richtwerks; und

Figur 2

einen Querschnitt durch das in Figur 1 dargestellte erfindungsgemäße Richtwerk.

Show it:

Figure 1

a schematic representation in longitudinal section through an embodiment of the straightening device according to the invention; and

Figure 2

a cross section through the straightening unit 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 into an adjustment or illustrated 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 proportioning 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 pick roller or pull roller by means of a further pneumatic or hydraulic cylinder, controlled by a proportional pressure control valve is employed separately.

Claims (29)

Straightener for straightening belts to be fed to the press, preferably metal belts, with lower and upper straightening rollers (9, 10, 11, 12, 13) and (5, 6, 7, 8) between which the belt is passed and from which it is straightened, characterized in that a plurality of upper straightening rollers (5, 6, 7, 8) are held on a straightening mechanism bear (14) which is adjusted by means of an adjusting device (15) in the direction of the lower straightening rollers (9, 10, 11, 12 , 13) is adjustable. Straightener according to claim 1, in which all upper straightening rolls (5, 6, 7, 8) of the straightener (1) on the straightener bear (14) are supported. Straightener according to claim 1 or 2, wherein the adjusting device (15) arranged in the center of the straightening bar (14) is. Straightener according to one of claims 1 to 3, in which the adjusting device is designed as a hydraulic cylinder (15) is. Straightener according to one of claims 1 to 3, in which the adjusting device is designed as a lifting spindle unit is. Straightener according to one of claims 1 to 5, in which the proportion position of the directional bear (14) with respect to a straightening device cover plate holding the adjusting device (15) 18 is adjustable. Straightener according to claim 6, wherein the adjusting device (15) has a pressure piece (16) against one on the straightening device bear (14) attached pendulum plate (17), and the pressure piece (16) and the pendulum plate (17) to the mutually assigned contact surfaces in the direction of flow of the straightener (1) with the same radius of curvature concave or are convex or convex or concave. Straightener according to Claim 7, in which the straightener bear (14) on its front in the direction of flow of the straightening unit (1) and the rear end section by means of two each beam (19) articulated to it, each with a cross member (20, 21) is connected, the two trusses (20, 21) Also support the bracket (19) in an articulated manner. Straightener according to claim 8, in which the traverse stroke for both trusses (20, 21) can be adjusted separately. Straightening mechanism according to claim 9, in which each cross member (20, 21) preferably in the middle by means of a on the straightener cover plate (18) fixed guide column (22, 23) in the vertical direction to be led. Straightener according to claim 9 or 10, in which each traverse (20, 21) on their facing plate (18) Has two bevels (25, 26), between each and the straightener cover plate (18) adjustable wedge slide (27, 28) is arranged. Straightener according to claim 11, in which the two wedge slides (27, 28) each have a nut (29, 30) and are adjustable by means of a threaded spindle (33). Straightener according to claim 11 or 12, in which the two Bevels 25, 26 are formed in opposite directions and the Threaded spindle (33) corresponding to two opposite thread sections (31, 32). Straightener according to claim 12 or 13, wherein the threaded spindle (33) can be driven by a motor. Straightener according to one of claims 11 to 14, in which the straightener cover plate (18) in the stroke area of the two wedge slides (27, 28) each have a sliding insert (35, 36). Straightener according to one of claims 8 to 15, in which the crossbeams (20, 21) above the leveling plate (18) are arranged. Straightener according to one of claims 1 to 16, in which on the front in the direction of the straightening unit (1) and rear end of the straightening device (14) a sliding device (37, 38) is arranged with a guide device (39, 40), which is formed on the straightening unit (1), cooperates, to guide the straightener bear (14) in the straightener (1). Straightener according to claim 17, wherein the sliding device on the two in the direction of the straightening unit (1) front and rear corners of the straightening device bear (14) respectively has a preferably hardened slider (37, 38), the corresponding areas of the frame of the straightening unit (1) a preferably hardened guide piece (39, 40) is assigned. Straightener according to claim 18, wherein the at the front End of the straightening device (14) arranged sliding pieces (37) on a bracket of the front upper straightening roller (5) and arranged at the rear end of the straightening device bear (14) Sliders (38) on a bracket of the rear upper Straightening roller (8) are arranged. Straightener according to claim 18 or 19, wherein the sliders (37, 38) on their associated guide pieces (39, 40) facing contact surface in a radius of curvature are curved, which is preferably corresponds to the radius of curvature that the pendulum plate (17) or the pressure piece (16). Straightener according to one of claims 1 to 10 and 16 to 20, for the vertical stroke limitation or adjustment the trusses (20, 21) each have two vertical Spindle drives per traverse (20, 21) or two coupled each Spindle drive elements on the inlet and outlet side Traverse (20, 21) are provided. Straightener according to one of claims 1 to 10 and 16 to 20, for the vertical stroke limitation or adjustment the traverses (18) each have a spiral eccentric shaft is provided. Straightener according to one of claims 10 to 22, in which on the tops of the crossbeams (20, 21) synchronism holder (41) are arranged, by means of which both traverses (20, 21) in the same vertical level on the straightening unit (1) parallel to Alignment bear (14) can be aligned. Straightening mechanism according to claim 23, in which each cross member (20, 21) has two synchronism holders (41). Straightener according to claim 23 or 24, in which each Synchronization holder (41) cushioned by means of a compression spring (43) is. Straightener according to one of claims 1 to 25, in which an upper feed roller is held on the straightening bar (14). Straightener according to one of claims 1 to 26, in which an upper pull-out roller is held on the straightening bar (14). Straightener according to claim 26 or 27, wherein the upper Feed roller and / or the upper pull-out roller separately, preferably by means of a pneumatic or hydraulic cylinder, is or are employable. Straightener according to claim 28, in which each pneumatic or Hydraulic cylinder using a proportional pressure control valve is controlled.

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