WO2013124093A1

WO2013124093A1 - Straightening machine

Info

Publication number: WO2013124093A1
Application number: PCT/EP2013/050666
Authority: WO
Inventors: Andreas Hellriegel; Hans-Peter Pflüger; Christian Hartmann
Original assignee: Arku Maschinenbau Gmbh
Priority date: 2012-02-23
Filing date: 2013-01-15
Publication date: 2013-08-29
Also published as: EP2631019B1; EP2631019A1

Abstract

The present invention relates to a straightening machine (1) for straightening material (11) to be straightened, particularly strips and parts made of metal, comprising a machine frame and an upper and lower straightening unit (3, 5), wherein the upper and lower straightening unit (3 and 5) each have a plurality of upper and lower straightening rollers (7 and 9), wherein the upper straightening rollers (7) are mounted in upper bearing strips (19) and the lower straightening rollers (9) are mounted in lower bearing strips (19), wherein upper and lower support rollers (15, 17) are provided to support the upper and lower straightening rollers (7, 9), of which two adjacent support rollers of both the upper and lower support rollers in the conveying direction (13) of the material (11) to be straightened work together with a straightening roller, characterised in that the support rollers (15, 17) can be shifted along the direction of the rotational axes (25) of the straightening rollers (7, 9).

Description

straightener

The present invention relates to a leveler for straightening Richtgut, in particular of bands and parts of metal. Conventionally, a leveler has a machine frame and an upper and a lower leveling unit. Such a straightening unit has a plurality of straightening rollers, which are mounted in bearing strips. The higher the demands on the straightening result with the aim of the evenness of the straightening material, the more straightening rollers are used. When straightening thin material, more straightening rolls are usually used with a smaller diameter than when straightening thick material using straightening rolls with a large diameter.

In order to prevent or compensate for deflections of the straightening rollers by the straightening forces arising during the straightening process, the straightening rollers, both the upper and the lower, are supported by support rollers. The support rollers are arranged so that in each case two adjacent in the conveying direction of the straightening support rollers cooperate with a straightening roller (see also Fig. 1 described further below).

Because of the high straightening forces and the associated deflection of the straightening rollers, a good support is crucial for the straightening result. Due to the high forces acting impressions are formed by the support rollers on the straightening rollers. The impressions are often called support impressions. Although the stucco impressions are often only visual but unsightly appearances, which are reflected on the straightening, so that these visual impressions, even if they are often not measurable, are detrimental to the result of straightening and affect the surface appearance of Richtguts. The present invention is therefore based on the object to avoid the above-mentioned disadvantages as far as possible and in particular to avoid the expression of significant Stützabdrücken on the leveling rolls.

This object is solved by the features of claim 1. As a result of the fact that the support rollers are displaceable along the direction of the axes of rotation of the straightening rollers, it is achieved that the contact surfaces of support rollers and straightening rollers can be changed, so that equalization of the support impressions on the straightening rollers is achieved.

This advantageously leads to a considerably longer service life of the straightening rollers on the one hand and to improvements in the straightening result due to reduced transmission or imaging of markings on the straightening material on the other hand.

Advantageously, the support rollers, which are arranged on a common axis of rotation, mounted in at least one support roller block and slidably disposed therewith. Thus, by displacing the at least one support roller block, the entire row of support rollers of a common axis of rotation can be displaced.

Advantageously, in one embodiment, the displacement of the support rollers take place in predetermined stages. Thus, the support rollers can be moved along its axis of rotation, for example, by the amount of its width, so that the new contact area between the support roller and straightening roller directly adjoins the previous contact area.

Advantageously serve for displacement displaceable spacers, which are arranged between an end-side support roller or an end-side Stützrollen- bock and the associated bearing bar.

Advantageously, the spacers are formed differently long, wherein a displacement of the support rollers or support roller blocks can be done by exchanging a longer against a shorter spacer on one side and vice versa on the other side along the axis of rotation of the support rollers. The spacers have suitable dimensions. In an advantageous embodiment, the difference of the long spacer and the short spacer substantially corresponds to the width of the support rollers. This creates a gradual shift Advantageously, the spacers on a threaded pin which is screwed into a corresponding threaded hole in the bearing strips and releasable again. Other connections of the spacers with the bearing strips and / or the Stützrollenböcken are also included in the present invention.

Alternatively, the displacement of the support rollers can also take place continuously. Advantageously, this displacement takes place by means of a motor drive. In this case, in an alternative embodiment, the motor drive may comprise a motor and a rotating shaft rotated by the motor with an external thread extending through a bore in the at least one support roller block and may provide the external thread in at least one internal thread provided in the bore is, intervene. The displacement of the supporting rollers supporting support roller block, or all support roller blocks, carried by rotation of the shaft.

Alternatively, the motor drive may comprise a motor and a rod longitudinally movable by the motor, which engages the at least one support roller block and displaces this support roller block during longitudinal movement of the rod.

Further details, features and advantages of the present invention will become apparent from the following description with reference to the drawings. In this case, the illustrated embodiments are preferred embodiments, to which the present invention is not limited. It shows:

Fig. 1 shows schematically an upper and lower straightening unit of a straightening machine (not shown) with upper and lower straightening rollers and upper and lower support rollers;

Figure 2 is a schematic view of a first embodiment of the straightening machine according to the invention according to arrow A of Figure 1 but with cut Stützrollenböcken ..; Fig. 3 is an analogous view of a straightening machine according to the invention for

Representation of Figure 2, but with Stützabdrücken on the straightening rollers.

4 shows a partial sectional view of a straightening machine according to the invention after gradual displacement of the support rollers with their support roller blocks;

Fig. 5 in end view and plan view of a spacer according to the present

Invention;

Fig. 6 shows a first alternative second embodiment of the invention

Straightening machine (only lower straightening unit) with motor-driven displacement device; and

Fig. 7 shows a second alternative embodiment of the second embodiment of the present straightening machine (lower straightening unit only).

In the accompanying drawings, like elements are designated by like reference numerals.

In Fig. 1, an upper straightening unit 3 and a lower straightening unit 5 is shown schematically in side view and in a conventional manner. The upper straightening unit 3 has upper straightening rollers 7, which are arranged according to so-called "Richtwalzenteilung" 8 at a predetermined distance from each other.

The lower straightening unit 5 has lower straightening rollers 9, which are also arranged according to the same Richtwalzenteilung 8 spaced from each other. As can be seen from Fig. 1, serve the upper and lower straightening rollers 7, 9 for straightening straightening 1 1, which is moved according to the conveying direction 13 between the upper straightening unit 3 and the lower straightening unit 5 therethrough.

As can be seen from Fig. 1, the upper straightening rollers are arranged offset by half the leveling roller pitch to the lower straightening rollers. The occurring during straightening high straightening forces that can lead to an adverse curvature of the straightening rollers 7, 9 are absorbed by upper support rollers 15 and lower support rollers 17 and thus avoids a curvature at least largely or completely. As shown in the example case according to FIG. 1, the upper support rollers 15 and the lower support rollers 17 are larger than the upper and lower straightening rollers 7, 9.

To promote the Richtguts 1 1 more or all of the upper and lower straightening rollers 7, 9 are driven. When passing through the Richtguts 1 1, the material undergoes a bending change. The alternating bending takes place in the plastic region of the straightening material. At the inlet between the straightening units 3, 5, so at the beginning of the straightening process, the bends and thus the bending bends are greatest. As the transport progresses, the alternating bends and thus the bending curvatures decrease until a completely level directional result is achieved.

In the following, reference is made to FIGS. 2 to 4.

In Fig. 2 is a view according to arrow A of FIG. 1, but additionally in partial section, a straightening machine 1 with the upper straightening unit 3 and the lower straightening unit 5 is shown schematically. The upper straightening unit 3 is shown according to section line AA of Fig. 1 and the lower straightening unit 5 according to section line BB of Fig. 1, wherein straightening machine 1 is shown in the open state and without Richtgut 1 1. As can be seen from FIG. 2, the upper straightening rollers 7 and the lower straightening rollers 9 are mounted in upper and lower bearing rails 19. The upper support rollers 15 are in upper Stützrollenböcken 21 and the lower support rollers 17 are mounted in lower Stützrollenböcken 23. The upper straightening rollers 7 and the lower straightening rollers 9 rotate about their rotation axis 25. The upper support rollers 15 mounted in the upper support roller blocks 21 rotate about their rotation axis 27 and the lower support rollers 17 mounted in the lower support roller blocks 23 rotate about their rotation axis 28. Still referring to Figure 2, the upper and lower support roller blocks 21 and 23 are laterally spaced from the respective bearing rails 19 and, as shown in Figure 2, at different distances. On the one hand, in Fig. 2 left, short spacers 29 and on the opposite side, in Fig. 2 right, long spacers 31 are disposed between the upper and lower Stützrollenböcken 21 and 23.

Reference is now made to FIG. 3. FIG. 3 corresponds to the view of FIG. 2, except that support impressions 33 are shown on straightening rollers 7 and 9 caused by upper and lower support rollers 15 and 17.

In Fig. 4 the inventive displacement of the upper and lower support rollers 15 and 17 relative to the position shown in FIG. 3 is shown. As can be seen from Fig. 4, the short spacers 29 have been substituted for the long spacers 21 and the long spacers 31 have been substituted for the short spacers. The upper and lower support roller blocks 21 and 23 have thus been shifted accordingly to the right in Fig. 4 and in operation of the straightening machine 1, the laterally offset Stützabdrücke 35 next to the Stützabdrücken 33. In the example shown case, the difference of the long spacer 31 and the short spacer 29 substantially the width of the support rollers 15, 17th

As can be seen from Fig. 4, this results in a displacement of the support prints, which advantageously leads to a longer service life of the upper and lower straightening rollers 7 and 9. At the same time over a longer period of time a satisfactory straightening result is achieved when straightening of straightening material 1 1 carried out by straightening machine 1. In Fig. 5, a long spacer 31 is shown in front view (top) and side view (bottom). The spacer 31 has a substantially rectangular body 37 which is cuboid-shaped, and has a threaded pin 39 on one of its end faces. The threaded pin 39 is screwed into a corresponding threaded hole in the respective bearing strip 19, whereby it dissolves bar is connected to the bearing strip 19. As can easily be understood, by simply unscrewing the spacer 31 can be detached from the bearing bar and replaced by a spacer shorter length, such as a spacer 29.

The displacement of the support roller blocks 21, 23 is done manually by the operator. The position in the axial direction 25 is held here only by the spacers 29, 31. When these are dismantled, all support roller blocks 21, 23 can be moved manually After mounting the spacers 29, 31, the support roller blocks 21, 23 are fixed again.

Reference is now made to FIG. 6.

FIG. 6 shows an alternative embodiment of a lower leveling unit 5 of the embodiment according to FIGS. 2 to 4. Since the upper straightening unit 3 is designed analogously, it is dispensed with its representation.

In the embodiment according to FIG. 6, only a single lower support roller block 23 is shown, which supports all lower support rollers 17. Of course, several support roller blocks can be provided. The displacement of the lower support roller block 23 is motorized and continuous. The lower support roller block 23 has a through hole 24 through which a rotary shaft 43 extends, which can be rotated by the motor 41 in rotation. The rotary shaft extends, as shown in FIG. 6, through a corresponding bore 20 in the motor 41 adjacent bearing bar 19, wherein there is no contact between the rotary shaft 24 and bearing bar 19.

The rotary shaft 43 has an external thread 44, which is engaged with internal threads of threaded bushes 45, which are arranged for example at the front ends of the lower support roller block. By rotating the rotary shaft 43 by means of the motor 41, the lower support roller block 23 according to double arrow 47 can be moved continuously in one or the other direction along the axis of rotation 25. In Fig. 7, another alternative embodiment of a continuous displacement drive of the lower support roller blocks 23 is shown. In contrast to the embodiment according to FIG. 6, the motor displacement takes place by means of a rod 51 which extends through the bore 20 of the adjacent bearing strip 19 and through the bores 24 of the support roller blocks 23. The shift according to double arrow 47 is accomplished by corresponding displacement according to double arrow 49 and 50, respectively. For the storage of the rod 51 nuts 53 are screwed onto the external thread 44 of the rod 51. The displacement of the upper and lower support rollers 15 and 17 can also be done by other suitable means, such as a hydraulic drive, etc. Thus, the displacement in the embodiment of Fig. 6 by a hydraulic motor and in the embodiment of FIG. 7 by a hydraulic cylinder.

The described embodiments of the straightening machine according to the invention are not limited to the illustrated embodiments. For example, height-adjustable support roller blocks may be provided for the purpose of selective deflection of the upper and lower straightening rollers 7 and 9, which are known per se from the prior art.

The present invention thus advantageously a reduction in wear of the upper and lower straightening rollers 7 and 9 is achieved or a reduction of the support impressions, so that the straightening rollers have significantly longer service life and can achieve a significantly improved directional result.

Claims

claims

Straightening machine (1) for straightening straightening material (1 1), in particular straps and parts made of metal, with a machine frame and an upper and a lower straightening unit (3, 5), the upper or lower straightening unit (3 or 5) each having a plurality of upper and lower straightening rollers (7 and 9), wherein the upper straightening rollers (7) in upper bearing strips (19) and the lower straightening rollers (9) are mounted in lower bearing strips (19), wherein for supporting the Upper and lower straightening rollers (7, 9) upper and lower support rollers (15, 17) are provided, of which two in the conveying direction (13) of the Richtguts (1 1) adjacent support rollers cooperate with a straightening roller, characterized in that the support rollers ( 15, 17) along the direction of the axes of rotation (25) of the straightening rollers (7, 9) are displaceable.

Straightening machine according to claim 1, characterized in that the support rollers (15, 17) of a common axis of rotation (27, 28) are mounted in at least one support roller block (21, 23) and arranged displaceably therewith.

Straightening machine according to claim 1 or 2, characterized in that the displacement of the support rollers (15, 17) in predetermined stages (33, 35) takes place.

Straightening machine according to claim 3, characterized in that for displacement displaceable spacers (29, 31) are provided.

Straightening machine according to claim 4, characterized in that the spacers (29, 31) are of different lengths, whereby the displacement takes place in stages.

6. Straightening machine according to claim 4 or 5, characterized in that the spacers (29, 31) have a threaded pin (39) which in a corresponding threaded bore in the bearing strips (19) can be screwed and released again.

7. straightening machine according to claim 1 or 2, characterized in that the displacement of the support rollers (15, 17) takes place continuously.

8. straightening machine according to claim 7, characterized in that the displacement by means of motor drive (41).

9. straightening machine according to claim 8, characterized in that the motor drive comprises a motor (41) and a rotatable by the motor in rotation rotary shaft (43) having an external thread (44) extending through a bore (24) in the at least a supporting roller block (23) extends and that the external thread (44) in at least one internal thread (45) provided in the bore, engages.

10. straightening machine according to claim 8, characterized in that the motor drive comprises a motor (41) and a longitudinally movable by the motor rod (51) which engages the at least one support roller block (23) and moves it.