EP1952906A2 - Straightening rotor, rotor straightener and method for straightening - Google Patents

Abstract

The rotor (1) has two freely positionable impact units (20) axially arranged symmetrical to a center plane relative to an axis of rotation of the rotor. The impact units are arranged mirror-symmetrical relative to the center plane of the rotor, where the impact units are arranged point-symmetrical relative to a pivoting point and/or a middle point of the rotor. The impact units include impact masses that are adjustable during rotating, where the impact masses are movable in a circumference direction. The impact units are provided with two impact disks. An independent claim is also included for a straightening method.

Description

The invention relates to a straightening rotor, a rotor straightener and a corresponding straightening method.

Such a rotor judge is for example from the US 1,936,679 , of the DE 10 34 576 B or DE 39 10 221 A1 known. In this case, a rod or a similar workpiece is guided by a peripheral frame of a straightening rotor and radially deflected by means of some straightening elements such that he or she loses its former curvature and a desired course, preferably a straight course, receives. This shows the US 1,936,679 an inlet-side straightening element and two outlet-side straightening elements, which grip a workpiece coaxially in the frame, while three bending effective central straightening elements are provided between the inlet and outlet side straightening elements, of which a central straightening element is arranged radially offset. The Indian DE 39 10 221 A1 rotor rotors shown, however, has two inlet-side straightening elements and two outlet-side straightening elements, which are also mounted in a rotating frame of a straightening rotor, of which, however, the respective outer straightening elements are fixedly secured to the rotating frame, while otherwise the straightening elements are formed by rolling elements. Also the straightening rotor after the DE 39 10 221 A1 has three internal other directional elements, but all of which are arranged offset radially. With a central straightening element and two outlet and two inlet-side straightening elements, all of which are mounted in a rotating frame, the straightening rotor works according to the DE 10 34 576 B ,

While the straightening rotor after the US 1,936,679 used as straightening elements consistently roller assemblies, beat the DE 39 10 221 A1 and the DE 10 34 576 B consistently the use of directional nozzles.

Such rotor straighteners are not to be confused with non-rotating straightening devices, such as those from the DE 195 03 850 C1 or from the DE 43 25 492 A1 are known and in which already a high degree of automation in the adjustment of the straightening elements is achieved, as in these documents and also by Marcus Paech in his article "Innovative straightening technique" in wire 2/1999, pages 46 to 51 is set out.

Accordingly, there are also efforts to increase the degree of automation in Richtflügelrotoren or Rotorrichtern, as this example, in the DE 197 09 733 C2 , in the DE 25 23 831 B2 , in the DE 43 11 566 A1 and in the WO 03/084695 A1 is disclosed. However, the respective measures initially limited to attempts to position straightening elements in a suitable manner. In the implementation of these approaches has been found that significant structural measures in the straightening rotor or in a corresponding leveler are necessary by these adjusting devices, on the one hand can be extremely expensive such a straightening rotor or such straightening machine and on the other hand, due to considerable centrifugal forces , Bring balancing problems with it or can be used reliably only at standstill of the rotor.

It is an object of the present invention to develop a straightening rotor or a rotor straightener and a straightening method with a straightening rotor in such a way that higher speeds can be achieved.

As a solution, the invention proposes on the one hand before a straightening rotor, which is characterized by at least two freely positionable balancing means which are arranged axially with respect to a rotational axis of the straightening rotor substantially symmetrical to a median plane.

In contrast to the prior art, changes in the mass distribution of the straightening rotor can be made via freely positionable balancing means, in particular if they are for example, are also due to the workpiece, take into account. Fixed balancing means, such as balancing bores or predetermined and attachable balancing masses, which can be recognized as a function of a working position of straightening elements, as this example, in the DE 35 46 029 C2 are disclosed, in particular are not able to do so. Also, such measures a fine adjustment, as is necessary for example in an individual readjustment of the directing means, usually do not accomplish.

Only by the invention freely positionable balancing the center of gravity - and due to the arrangement of the balancing axially with respect to a rotation axis of the straightening rotor substantially symmetrically to the center plane and the center axis - optimally aligned, which ultimately allows only correspondingly high speeds.

Depending on the specific requirements, the balancing means can be oriented substantially mirror-symmetrically with respect to the center plane or substantially point-symmetrically with respect to a center of gravity of the straightening rotor or with respect to a center point of the straightening rotor. While the focus herein represents the theoretical or actual result of a mass distribution of the straightening rotor in an idealized state, the latter represents a computational size due to the spatial distribution of the straightening rotor. It is understood that deviations from these points can be compensated accordingly by the balancing means. Such a symmetrical arrangement is in itself relatively easy to provide and in particular allows alignment of both the center of gravity and a center of gravity axis to minimize any imbalances and thus to allow maximum speed.

Accordingly, it is advantageous, regardless of the exact arrangement of the balancing means, if they are aligned in the second order, that is to say in particular with respect to the center of gravity axis, which in their absolute position and in their direction should be effective. The latter can be particularly structurally particularly easy to implement by exactly two balancing means, which are effective in second order accordingly.

Preferably, the balancing means are adjustable during circulation, so that any fluctuations that may occur, in particular, for example, by migration effects or by fluctuations in the workpiece can be collected directly and promptly. It goes without saying that adjustable balancing means can also be used advantageously correspondingly in a straightening rotor independently of the other features of the present invention during circulation.

Preferably, the balancing means may comprise balancing masses which are correspondingly adjustable during circulation. By means of such balancing masses, alignment of the center of gravity axis can be realized in a particularly simple and precise manner.

The latter is especially true when the balancing masses are displaced in the circumferential direction, which in particular at high speeds, a reliable adjustment can be guaranteed, as this is possible in arrangements according to the prior art, as acting on the balancing centrifugal forces in a movement in the circumferential direction no Role-play. Accordingly, it is understood that circumferentially displaceable balancing masses are also advantageous independently of the other features of the present invention.

Balancing masses displaceable in the circumferential direction can be realized particularly simply by means of balancing disks, wherein in a particularly simple embodiment such a balancing disk can have a recess asymmetrically with respect to its central axis, so that the center of gravity or the center of gravity axis of the balancing disk deviates from the central axis. With two such balancing disks, the total center of gravity can then be aligned as desired within a maximum radius defined by the mass eccentricity of the balancing disks. Such balancing discs can be adjusted in particular relatively precisely - and, if necessary, even at high speeds - accordingly.

In addition, the invention proposes a rotor straightener with a straightening rotor, which is characterized by a device for measuring unbalance of the straightening rotor. By such an arrangement can be detected in deviation from the prior art, the imbalance of the straightening rotor in the rotor straightener, so that influences of storage and the like can be detected with. This ensures a much more accurate detection of imbalance, so that higher speeds are possible.

In particular, it is advantageous if the measuring device is or can be effective during straightening, so that influences that occur during straightening can be detected accordingly.

Preferably, the measuring device detects imbalance second order, so that by appropriate balancing the axis of gravity of the straightening rotor can be optimally aligned.

Since a plurality of rotor jacks are generally used in a machine park, the measuring device can preferably comprise a decoupled measurement evaluation, so that the measurement evaluation can be applied to a plurality of rotor jacks. In this way, costs can be saved, whereby possibly even the sensor system can be decoupled.

In addition, the invention proposes a straightening method with a straightening rotor, which is characterized in that during straightening the imbalance of the straightening rotor is measured. In this way, in particular influences of the workpiece or during the straightening occurring fluctuations can be detected, so that a center axis can be optimally aligned, whereby the rotational speeds can be increased accordingly.

Preferably, balancing masses are also adjusted during straightening according to the measurement results, so that the straightening rotor is accordingly optimally balanced during straightening.

The latter is preferably done by the definition of a center of gravity axis, which is then aligned accordingly preferably by balancing masses with respect to the axis of rotation.

It is understood that the present invention can be used not only to increase the rotational speeds. At the same rotational speeds, the present invention relieves the material so that, if necessary, the service life can be increased or work can be carried out with lower stabilities. In particular, the set-up of the unbalance and / or a local balancing the setup time for a corresponding straightening rotor can also be significantly reduced. In addition, a corresponding control loop can be formed by the coupling of on-site measurement and sub-local balancing, which enables a particularly precise balancing, in particular without complex theoretical considerations, but only based on the actually occurring measurement results and imbalances.

In a particular embodiment, the straightening rotor preferably comprises balancing elements which can be positioned by means of a balancing drive with respect to the straightening rotor axis and fixable in a position by means of a fixing, the co-rotating balancing drive and the fixing being accessible from the outside over a linear path and running along this path or along This way directed movement are to be operated. In this way, the straightening rotor can be balanced reliably and quickly as needed.

Likewise, the straightening rotor may comprise at least one straightening element which can be radially adjusted via an adjusting device, the adjusting device having a co-rotating adjusting drive and a fixing, and the co-rotating adjusting drive and the fixing accessible via a linear path from the outside and to be actuated by a movement around this path or directed along this path.
Independently of the features of the present invention, this approach deviates from the considerations hitherto made for automation, which require comparatively complex adjustments on the rotor. This approach thus takes on the already since 1933 from the US 1,936,679 Known straightening rotors back and allows them by appropriate design of the co-rotating actuator and the fixation that they are safe to operate even from a machine.

Thus, the straightening rotor after the US 1,936,679 each lateral, provided deep inside the rotating frame clamping screws, which are detected by an automaton at reasonable cost in itself not reliable and operate. Also at the DE 39 10 221 A1 An actuation of the fixation for the straightening elements by a machine is not possible, since an opening of the straightening elements adjusting screws would lead to a complete loss of charge of the screws or the straightening elements themselves. Accordingly, additional measures, such as, for example, an intermediate fixing of the straightening elements or of the fastening clips and screws or the like, are necessary for an actuation.

This approach is accordingly deviating from the considerations of the prior art from the basic knowledge that for an automatic adjustment, and thus for a considerable improvement and reproducibility of the straightening result, a straightening rotor is to be moved to an adjustment position in which then from the outside, An adjustment is made with an automatic machine of the corresponding straightening machine. It will be appreciated that such an approach is not necessary with straightening rotors which allow for balancing during rotation.

Accordingly, this approach also proposes, independently of the other features of the present invention, a rotor straightener with a straightening rotor with at least one via an adjusting radially adjustable guide element, wherein the adjusting device comprises a co-rotating actuator and a fixing and a stationary drive, which straightening machine is characterized in that both the straightening rotor and the stationary drive an adjustment position, in which the stationary drive with the actuating drive and / or the fixing occurs in operative connection, and the stationary drive have a deviating from the adjustment position operating position in which the straightening rotor is freely rotatable. In this way, in the adjustment position, the straightening element can be adjusted by the stationary drive, while in the operating position of the stationary drive does not hinder rotation of the rotor.

This approach also proposes, independently of the other features of the present invention, a method for adjusting a straightening element of a straightening rotor, which is characterized in that at standstill of the straightening rotor, a stationary drive operatively connected to an actuator and / or a fixation of the straightening element, then by targeted Control of the drive adjusts the straightening element, dissolved or fixed and then the drive and the actuator are separated.

In this respect, this approach differs from the specifications of the prior art and also from the adjustable during the circulation, balancing described above, which allow a nozzle adjustment with a rotating rotor or seek to enable. This makes it possible for the present invention, a corresponding straightening machine over the prior art much cheaper to design, although a possible during circulation balancing balancing disks is also feasible cost. In addition, the corresponding straightening rotor can be much lighter and better balanced, since a follower drive is not required for the balancing drive, whereby higher speeds and thus a higher power of the straightening rotor is ensured. In addition, this approach makes it possible, in a relatively cost effective manner, to do more than one not all, straightening elements to adjust as needed by means of a machine, which is not possible or only with considerable effort in known devices.

The actual adjustment process can take the form that first the straightening rotor is stopped in its adjustment position. Then, the stationary drive can be brought into its adjustment position accordingly. Through an operative connection between the stationary drive with the actuating drive or the fixation, the straightening element can then be released, appropriately displaced or adjusted and / or re-attached.

Accordingly, cumulatively or alternatively, a rotor straightener with a straightening rotor having at least one straightening element radially adjustable via an adjusting device is proposed, in which the adjusting device comprises a co-rotating adjusting drive and a fixing and a stationary drive and which is characterized in that in the drive train between stationary drive and mitrotierendem actuator or fixing a separator is provided.

A corresponding separating device can be realized for example via the head of a screw and the complementary counterpart of a screwdriver. On the other hand, any other releasable connection, with which a drive with a corresponding actuator or with a corresponding fixation can be releasably operatively connected, are used.

The approach described above can also be used for a balancing drive and its fixation in an immediately comprehensible manner.

Preferably, the actuator or the balancing drive and the fixation on a same connection, so that the stationary drive can be moved as needed to the fixation or to the actuator or a balancing drive and operatively connected with this. In this way, a single stationary drive for different actuators, balancing strut or fixations can be used. In this context, it should be emphasized that the term "stationary" refers only to the rotation of the straightening rotor. Otherwise, the stationary drive can be displaced, for example, along the straightening rotor. This can be done for example in a structurally particularly simple manner via a linear adjusting device. In addition, means may be provided, with which the stationary drive can be displaced radially with respect to the straightening rotor, so that when it is axially positioned with respect to the respective actuator or balancing drive or the respective fixation, with the actuator or balancing drive or the Thus, the fixation can be brought into its adjustment position in which, for example, the separating device is closed or brought into operative connection.

Depending on the specific configuration of the actuating or balancing drives or the fixing, they can also have an identical connection. This can be the case, in particular, when self-locking threads or other self-locking devices are used for the actuating or balancing drives, which accordingly can also serve as fixation. On the other hand, somewhat more complex arrangements are conceivable in which an adjustment, ie an adjustment and the operating environment adapted, sufficient fixing can be ensured via an identical connection.

Alternatively, adjusting or balancing drive and fixing can also be designed separately. Thus, for example, oppositely effective screws or other thread arrangements are conceivable in which a release of a screw allows a displacement or adjustment of the straightening element by means of the other screw. Again, a variety of concrete implementations are possible by means of which structurally simple way a straightening element or a balancing means or a balancing mass adjusted, that is, can be suitably adjusted and fixed.

Since such straightening rotors with up to 8,000 rev / min and more, guide times for an adjustment of the straightening elements or balancing masses prove to be critical. This especially if an adjustment at a standstill of the straightening rotor takes place, since it takes a considerable time until the corresponding speed differences are passed through. This is obviously also the reason for the efforts to allow adjustment while the straightening rotor is running. Deviating from these considerations, the present approach has come to the realization that the time losses, which are caused by an adjustment with stationary straightening rotor can be kept within limits, if before and after, if necessary, also maintained during the adjustment of the direction of rotation of the straightening rotor. In particular, it should be avoided that a rotation reversal occurs during the adjustment. Such an approach makes it possible, in particular, that an adjustment of the straightening elements or balancing masses can also take place in the workpiece present in the straightening rotor. Accordingly, already during the acceleration phases, both at a speed increase and at a speed reduction, a straightening of the workpiece, but with reduced throughput.

By using an automatic adjustment machine, however, the standstill time can be reduced to a minimum in this approach, so that due to the adjustment during standstill only minimal time losses are due to the advantages described above, in particular an increased speed and thus an increased throughput, only marginally diminish. In this context, it is understood that the maintenance of the sense of rotation before, after or while adjusting under standstill and the adjustment when already inserted workpiece individually or together independently of the other features of the present invention for the adjustment of the straightening elements of a straightening rotor with the help of a the adjustment effecting machine is advantageous.

Both the straightening rotor and a stationary drive of the straightening machine may preferably have positioning positions in which the stationary drive can come into operative connection with the balancing drive, so that positioning of the balancing element is possible by the drive.

In accordance with the process control during the adjustment, balancing can also take place when the straightening rotor is at a standstill. Here, a drive with a balancing drive of a balancing element operatively connected, then positioned by targeted control of the drive balancing element and then the drive and the balancing drive are separated again. It is understood that such a balancing operation with built-in straightening rotor is also advantageous regardless of the other features of the present invention. In particular, such a procedure requires a minimum intervention in the actual straightening process as has already been described with respect to the straightening element adjustment.

As already disclosed with respect to the actuating drive or the fixing, it is advantageous if the stationary drive has a different operating position from the balancing position, in which the straightening rotor can rotate freely. It is likewise advantageous if a separating device is provided in the drive train between stationary drive and co-rotating balancing drive, so that the stationary drive can be separated from the balancing drive without further ado.

The balancing drive and the actuating drive preferably have the same connection. In this way, the stationary drive can be brought into operative connection both with an actuator or a fixation and with a balancing drive and, if necessary, its fixation. Thus, the overall arrangement is extremely inexpensive and the straightening rotor can be adjusted at standstill both in terms of its straightening elements and balanced.

It is understood that the stationary drive - depending on the axial position of the adjusting or balancing drives or fixings - can have several different adjustment positions or balancing positions. It may also be advantageous that the stationary drive has a linear adjusting device, via which a drivable connecting member of the stationary drive, which can connect the stationary drive with an actuator, a fixation and / or a balancing drive, axially along the Straightening rotor is displaced. By means of such an arrangement, the stationary drive can be quickly and reliably brought from an adjustment or balancing position in an operating position or vice versa, in the operating position on the one hand rotate the straightening rotor and on the other hand, the stationary drive can be axially positioned along the straightening rotor. Such an arrangement is particularly compact in straightening machines with a rotating straightening rotor and makes it possible to leave very few components on the straightening rotor itself, while a large part of the components required for adjusting the straightening elements or for balancing are provided via the stationary drive can be.

Depending on the specific arrangement of the adjusting or balancing drives or fixings or balancing drives, the straightening rotor can also have a plurality of adjusting positions or balancing positions. In this way, by means of a machine in the circumferential direction differently arranged adjusting drives, fixings or balancing drives can be controlled easily. It is understood that a straightening machine or an adjustment method for a straightening machine, in which one or more adjustment positions or balancing positions are provided, in which an automaton can perform an adjustment and / or balancing, also independent of the other features of the present invention advantageous is.

Preferably, the straightening rotor comprises at least one balancing mass, which is displaceable by means of an adjusting drive of an adjustable straightening element. In this way, a balancing mass in the moment by a straightening element is displaced, be displaced, so that - at least within certain limits - a caused by the displacement of the straightening element unbalance is met. It is understood that such a coupling between actuator and balance mass is also independent of the other features in a straightening rotor with adjustable straightening advantageous to the occurrence of imbalance or the time wall for the compensation of such imbalance when the straightening element is adjusted to minimize. It goes without saying that such a balance mass just differs from the freely positionable balancing means.

For example, the actuator may comprise a threaded bolt which displaces both the straightening element and the balancing mass. Such an arrangement is extremely compact, which is particularly in consideration of the structural conditions and the high speeds of advantage.

Also, such a threaded bolt having an opposing thread with two partial threads, wherein the straightening element is operatively connected to a first of the two partial thread and the balancing mass with a second of the two partial thread. During a rotation of the bolt then directional element and balance mass move in opposite directions, this opposing movement can be used with a suitable arrangement for unbalance compensation. Depending on the specific embodiment of the straightening rotor, the two partial threads may have different slopes. Likewise, different bolt strengths are conceivable.

Particularly at high rotational speeds, known rotors show weaknesses regardless of whether the straightening elements are adjustable or not. These result in a deterioration of the surface of the workpiece, so that these straightening rotors can not be operated at the desired speed and thus with the desired throughput. In order to be able to meet this disadvantage, it is proposed that the straightening rotor comprises at least one inlet-side and one outlet-side straightening element and a central, eccentrically disposable straightening element disposed therebetween, wherein the inlet-side or outlet-side straightening element has a multi-side guide and the central straightening element has a straightening nozzle. Such an arrangement leads inlet side or outlet side of the workpiece sufficiently, so that in particular vibrations are avoided, which are increasingly trained in rotors of the prior art, which are operated at increasing speeds, and can damage the workpiece. On the other hand, by using a Directional nozzle in the central straightening element, which performs the actual bending and straightening process, an unnecessarily high material loading of the workpiece can be avoided.

In the present context, inlet and outlet-side straightening elements are correspondingly characterized in that they are not adjustable radially relative to a rotation axis of the straightening rotor or are arranged on the rotation axis of the straightening rotor. On the other hand, central straightening elements are provided eccentrically or adjustably with respect to the axis of rotation.

This measure leads to one of the straightening rotors of DE 39 10 221 A1 and US 1,936,679 deviating straightening rotor, which can not be operated at very high speeds. This is possible only with the combination of inlet side and / or outlet side multi-side guide and the use of a central directional nozzle, as proposed above. It is understood that a multi-side guides provided on both the inlet side and the outlet side are particularly advantageous from certain speeds of rotation.

To minimize the load on the workpiece, depending on the specific speed and the speeds occurring there, a rolling guide for the inlet-side and the outlet-side straightening element may be provided. On the other hand, a slide guide or a rigid guide is also conceivable here. A rolling guide can be realized, for example, by two rollers with a toroidal shape, which can seize different workpiece diameters reliable and gentle on material in a particularly simple and uncomplicated way. Alternatively, three or more opposing rolls may be provided. By a plurality of rollers, a multi-side guide can be realized accordingly.

Under certain circumstances, it is possible to dispense with a multi-side guide with an inlet-side and / or an outlet-side straightening element, in which case, in particular, a directional nozzle is offered, in which case it is in particular a game less than 0.4 mm, preferably less than 0.3 mm, which under given circumstances sufficient guidance can be ensured.

Between the central straightening element and the inlet-side straightening element or the outlet-side straightening element, a further central straightening element can preferably be provided. This makes it possible to significantly improve the straightening result with respect to simpler arrangements, since even more deformed workpieces can be sufficiently deformed with a low rotor diameter. Preferably, this further central straightening element is mounted eccentrically to optimize this effect.

To protect the material, it is advantageous to design at least one of the central alignment elements, preferably all, as a rolling directional nozzle.

The design of the individual directional elements shows, regardless of the other features of the present invention, the aforementioned advantages, so that they also improve irrespective of these features advantageous a straightening rotor, especially if it is to be operated at very high speeds.

Figur 1

eine schematische Seitenansicht eines ersten erfindungsgemäßen Rotorrichters;

Figur 2

den Rotorrichter nach Figur 1 teilweise aufgebrochen;

Figur 3

eine Alternative für die einlaufseitigen bzw. auslaufseitigen Richtelemente der Anordnung nach Figuren 1 und 2;

Figur 4

eine schematische Seitendarstellung der Wuchtscheiben für die Anordnungen nach Figuren 1 bis 3;

Figur 5

eine schematische Seitenansicht eines weiteren erfindungsgemäßen Rotorrichters; und

Figur 6

eine perspektivische, teilweise aufgebrochene Darstellung eines Richtrotors für einen Richtmaschine Rotorrichter nach Figur 5.

Further advantages, objects and characteristics are explained in the following description of attached drawings. In the drawing show:

FIG. 1

a schematic side view of a first rotor judge according to the invention;

FIG. 2

after the rotor judge FIG. 1 partially broken up;

FIG. 3

an alternative for the inlet-side and outlet-side directional elements of the arrangement according to FIGS. 1 and 2 ;

FIG. 4

a schematic side view of the balancing disks for the arrangements according to FIGS. 1 to 3 ;

FIG. 5

a schematic side view of another rotor straightener according to the invention; and

FIG. 6

a perspective, partially broken view of a straightening rotor for a straightening machine rotor judge after FIG. 5 ,

The rotor judge after FIG. 1 has a straightening rotor 1, which rotates about a workpiece 2, which passes through this. The straightening rotor 1 has a frame 4, which is mounted in bearing blocks 5 and carries a total of five straightening elements 6 to 10. About the straightening elements 6 to 10, the workpiece 2 is bent radially relative to the axis 3 of the straightening rotor 1, while this rotates and it passes through this.

Here are the straightening elements 7, 8 and 9 as a directional nozzles (not numbered) formed in a conventional manner. The same applies in this embodiment also for the inlet-side and outlet-side straightening elements 6 and 10 in the embodiment according to FIG. 3 the latter are represented by toroidal rollers 11 with offset axes, wherein the toroids are preferably designed such that they rest with respect to their axial angle respectively with a substantially straight line of action on the workpiece 2. While this embodiment advantageously avoids vibrations, vibrations in the embodiment are after FIG. 2 avoided by particularly narrow inlet and outlet side directional nozzles, which leave less than 0.2 mm clearance to the workpiece 2.

In each case inlet side with respect to the inlet-side straightening element 6 and the outlet side with respect to the outlet-side straightening element 10 4 balancing means 20 are provided (numbered example) on the frame. The balancing means are substantially mirror-symmetrically with respect to a center plane (not shown) of the straightening rotor 1, which is perpendicular to the axis 3 and extends in the middle by the straightening element 8, arranged.

In this way, two balancing means can be provided which can be aligned or positioned freely, in particular independently of the straightening elements. In particular, a center of gravity axis can thereby be readily optimized in the desired manner with respect to the axis 3 in the second order.

The balancing means 20 are in the embodiments after FIGS. 1 to 3 formed by with respect to the frame 4 rotatable balancing disks 21A to 21D. The disks 21A to 21D have, as in FIG. 4 shown balancing recesses 22, so that the balancing disks 21A to 21D each have eccentric centers of gravity with respect to its outer circumference and its center point 23. By rotating the balancing disks 21A to 21D, the common center of mass m1 or m2 of the balancing disks 21A and 21B or 21C and 21D can be adjusted within a maximum radius. The arrangement of the balancing disks 21A to 21D on both sides of the straightening rotor 1 accordingly permits second-order balancing, so that a center of gravity axis can be readily aligned with respect to the rotation axis 3.

The balancing disks 21A to 21D can be provided with scales, in particular during a manual operation, so that the balancing disks 21A to 21D can be adjusted reliably. The balancing disks 21A to 21D can also be coupled to a motor drive which, on the one hand, can act in a fixed, externally acting manner on the balancing disks 21A to 21D or, on the other hand, can be provided co-rotating. In this respect, the balancing wheels 21A to 21D rotate about the axis 3 of the straightening rotor, so that they can be displaced, in particular, almost without the action of centrifugal force.

In addition, the rotor judge declines FIG. 1 a device 30 for unbalance measurement. This includes two sensors 31 and a tachometer 32, which are connected by means of cable 33 with a measurement evaluation 34. By separating the cable 33, the measurement evaluation 34 can be decoupled and made available to other rotor straighteners.

As can be readily appreciated, the gauge 30 is effective during straightening and detects second order imbalances. In particular, if the balancing means 20 can be adjusted during rotation, the results of the measuring device 30 can be used directly for balancing, in which case advantageously the measurement evaluation 34 should not be decoupled. On the other hand, based on the measurement evaluation, an angular position for the manual adjustment of the balancing wheels 21 A to 21 D can be specified.

The in the Figures 5 and 6 Straightening machine shown comprises on the one hand a straightening rotor 101 which rotates about a workpiece 102, which passes through this, and on the other hand, a stationary drive 103. The straightening rotor 101 has a frame 104 which is mounted on bearings 105 and carries a total of five straightening elements 106 to 110. Via the straightening elements 106 to 110, the workpiece 102 is bent radially with respect to the axis of the straightening rotor as it rotates and passes through it.

In this embodiment, the straightening elements 107, 108 and 109 are configured as directional nozzles 115 (numbered as an example), wherein - in particular for the protection of the workpiece at high rotational speeds - these nozzles are roller-mounted. On the other hand, the inlet-side and outlet-side straightening elements 106 and 110 have a multi-side guide, which in the present exemplary embodiments is formed by toroidal rollers 111 (numbered as an example) with offset axes. At this point, alternatively, a guide with more than two rollers or a guide can be provided on corresponding more multi-sided on the workpiece 2 scenes. It is essential that on the inlet side or outlet side in the present embodiment, a multi-sided guide is provided in order to avoid vibrations of the workpiece, even at high speeds can. Also can be transmitted by tilting the axis feed to the workpiece 102.

About threaded bolts 112, 113 and 114 (only exemplified), the straightening elements 106 to 110 are adjustable to the frame. Here, the threaded bolt 112 serves as an actuator and as a fixation for the rollers 111, while the bolt 113 is used as an actuator for the directional nozzles 115. The threaded bolt 114 causes a strain of the respective directional nozzle 115 supporting member and the respective threaded bolt 113 and thus serves to fix the straightening elements 107 to 109. One lateral guide and in particular a recording of torques about the axes of the threaded bolts 112, 113 and 114 are not shown guide rails with grooves, in which projections 116 (in FIG. 2 exemplarily numbered) sliding intervene.

For the displacement of the rollers 111, only the bolts 112 need to be rotated accordingly, which are designed to be self-locking under the present operating conditions. To adjust the directional nozzles 115, the threaded bolts 114 are first released. Subsequently, the directional nozzles 116 are displaced via the threaded bolt 113 in the desired manner. Finally, the threaded bolts 114 are tightened again and fixed in this way the directional nozzles 116.

As balancing masses are in this embodiment to compensate for a conditional by adjusting plates 117 (exemplified), which are also in operative connection with the threaded bolt 113 and are guided over projections 118 in the aforementioned grooves. In order to show corresponding effect, the bolts 113 are provided in the region of the plates 117 with a thread whose pitch deviates from the thread pitch of the rest of the bolt. In this way, the plates 117 can perform a direction of the nozzles 116 proportional but different strong and / or differently directed movement without a separate drive must be provided. Thus, it is possible with minimal effort to achieve, albeit only partially, compensation for an unbalance arising during adjustment, as a result of which the set-up times can be minimized.

The straightening rotor 101 also has at its ends circumferentially distributed balancing elements 119, which are mounted as threaded bolts in radially directed threaded bores of used as a balancing means 120 side walls of the frame 104 and therefore represent immediately balancing masses. By turning these balancing elements 119 beyond the action of the plates 117 beyond the straightening rotor 101 can be balanced. In this case, the threaded bores are substantially point-symmetrical with respect to a center of the straightening rotor (not shown), wherein the center is located in a rotation axis of the straightening rotor 101 and is located exactly at the center between the side walls.

In this way, two balancing means can be provided which can be aligned or positioned freely, in particular independently of the straightening elements. In particular, a center of gravity axis can thereby be readily optimized in the desired manner with respect to the axis of rotation.

The bolts 112, 113 and 114 and the bolts 119 each have an identical head, which can be brought into engagement with a connecting piece 121 of the stationary drive 103. For this purpose, the connector 121 on the one hand radially along the arrow 130 and a linear actuator 122 axially along the arrow 131 with respect to the rotor axis displaced. In this way, the stationary drive 103 between an operating position in which the rotor 101 can rotate freely, and various adjustment and balancing positions in which it is in engagement with the respective bolts 112, 113, 114, and 119, be relocated. Accordingly, the rotor 101 may present the bolts 112, 113, 114, and 119 to the stationary drive 103 by staying in an appropriate rotational position and being in respective adjustment or balance positions.

In this respect, the bolts 112, 113, 114 and 119 together with the corresponding threads the above-explained actuators, fixings or balancers, with which the respective modules, straightening elements, fixing elements or balancing elements or balancing plates, can be displaced and / or fixed.

By rotation of the connecting piece 121 by means of a rotary drive 123, as indicated by arrow 132, then the actuators, fixings and balancing drives are driven and the bolts 112, 113, 114, and 119 are displaced to the desired extent. The connection between connector 121 and respective bolt 112, 113, 114, and 119 can be separated again by moving the connecting piece 121 along the arrow 130 away from the rotor 101, wherein the movement in the direction of the arrow 130 on the one hand only due to the component 123 or by moving the linear actuator 122 can.

Claims (57)

Straightening rotor, characterized by at least two freely positionable balancing means, which are arranged axially with respect to a rotational axis of the straightening rotor substantially symmetrical to a median plane. Straightening rotor according to claim 1, characterized in that the balancing means are aligned substantially mirror-symmetrically with respect to the center plane of the straightening rotor. Straightening rotor according to claim 1, characterized in that the balancing means are aligned substantially point-symmetrically with respect to a center of gravity or with respect to a center point of the straightening rotor. Straightening rotor according to one of the preceding claims, characterized by second order effective balancing means. Straightening rotor according to claim 4, characterized by exactly two effective in second order balancing means. Straightening rotor, in particular according to one of the preceding claims, characterized by adjustable during circulation balancing means. Straightening rotor according to claim 6, characterized in that the balancing means comprise balancing masses which are adjustable during circulation. Straightening rotor, in particular according to one of the preceding claims, characterized by displaceable in the circumferential direction balancing masses. Straightening rotor, characterized by at least two balancing discs comprehensive balancing. Straightening rotor according to one of the preceding claims, characterized by at least one balancing means which can be positioned via a balancing drive with respect to a straightening rotor axis and fixable in a position via a fixation, wherein the co-rotating balancing drive and the fixation accessible via a linear path from the outside and one about this Way surrounding or directed along this path movement are to be operated. Straightening rotor according to one of the preceding claims, characterized by at least one adjusting device via a radially adjustable adjusting element, wherein the adjusting device has a co-rotating actuator and a fixation and the co-rotating actuator and the fixation accessible via a linear path from the outside and on a circulating around this path or Movement directed along this path are to be operated. Straightening rotor according to claim 10 or 11, characterized in that the adjusting drive or the balancing drive and the fixing have an identical connection. Straightening rotor according to claim 12, characterized in that the adjusting drive, the balancing drive or the fixing comprise a self-locking gear. Straightening rotor according to claim 10 and 11, characterized in that the balancing drive and the actuating drive have a same connection. Straightening rotor according to one of the preceding claims, characterized by at least one balancing mass which is displaceable by means of an adjusting drive of an adjustable straightening element. Straightening rotor according to claim 15, characterized in that the balancing mass is displaced synchronously with the straightening element. Straightening rotor according to claim 16, characterized in that the adjusting drive comprises a threaded bolt, which displaces both the straightening element and the balancing mass. Straightening rotor according to claim 17, characterized in that the threaded bolt has an opposite thread with two partial threads, wherein the straightening element is operatively connected to a first of the two partial thread and the balancing mass with a second of the two partial thread. Straightening rotor according to one of the preceding claims, characterized in that the straightening rotor comprises at least one inlet-side and one outlet-side straightening element and a centrally arranged eccentrically arranged thereon straightening element, wherein the inlet-side or the outlet-side straightening element has a multi-side guide and the central straightening element has a directional nozzle. Straightening rotor according to claim 19, characterized in that the inlet-side and the outlet-side straightening element has a multi-side guide. Straightening rotor according to one of the preceding claims, characterized in that the straightening rotor comprises at least one inlet-side and one outlet-side straightening element and a centrally disposed eccentrically arranged thereon straightening element, wherein the inlet-side and / or the outlet-side straightening a Richtdüse with a clearance of less than 0.4 mm , preferably below 0.3 mm. Straightening rotor according to claim 20 or 21, characterized in that the inlet-side and / or the outlet-side straightening element has a rolling guide. Straightening rotor according to claim 22, characterized in that the rolling guide comprises two rollers with a toroidal shape. Straightening rotor according to claim 22, characterized in that the rolling guide comprises three oppositely directed rollers. Straightening rotor according to claim 22, characterized in that the rolling guide comprises a rolling directional nozzle. Straightening rotor according to one of claims 19 to 25, characterized in that between the central straightening element and the inlet-side straightening element or the outlet-side straightening element another central straightening element is provided. Straightening rotor according to claim 26, characterized in that the further central straightening element eccentrically supports a workpiece with respect to a rotation axis of the straightening rotor. Straightening rotor according to claim 26 or 27, characterized in that at least one central straightening element has a rolling directional nozzle. Straightening rotor according to one of claims 22 to 25 and 28, characterized in that at least one rolling axis of a rolling assembly has a different direction than a rotational axis of the straightening rotor. Rotor straightener with a straightening rotor, characterized by a device for measuring unbalance. Rotor judge according to claim 30, characterized in that the measuring device is effective during straightening. Rotor judge according to claim 30 or 31, characterized in that the measuring device detects second-order imbalances. Rotor straightener according to one of claims 30 to 32, characterized in that the measuring device comprises a decoupled measurement evaluation. Rotor straightener according to one of claims 30 to 33, characterized in that both the straightening rotor and a stationary drive a positioning, in which the stationary drive with a balancing drive of a balancing element of the straightening rotor in operative connection, so that the balancing element can be positioned by the drive , And the stationary drive having a deviating from the balancing position operating position in which the straightening rotor is freely rotatable. Rotor judge according to claim 34, characterized in that a separating device is provided in the drive train between the stationary drive and co-rotating balancing drive. Rotor judge according to claim 34 or 35, characterized in that the stationary drive has a plurality of balancing positions, with which it can interact with a balancing drive of a balancing element. Rotor judge according to claim 36, characterized in that the stationary drive has a linear adjusting device, via which a drivable connecting member, which can connect the stationary drive with the balancing drive, axially along the straightening rotor is displaceable. Rotor straightener according to one of Claims 30 to 37, characterized by a straightening element which can be radially adjusted by means of an adjusting device, wherein the adjusting device comprises a co-rotating adjusting drive and a fixing and a stationary drive, and both the straightening rotor and the stationary drive have an adjusting position, in which the stationary drive with the actuator and / or the fixation occurs in operative connection, so that by the stationary drive the straightening element can be adjusted, and the stationary drive one of the adjustment position deviating operating position in which the straightening rotor is freely rotatable have. Rotor straightener according to one of claims 30 to 38, characterized by at least one adjusting device via a radially adjustable straightening element, wherein the adjusting device comprises a co-rotating actuator and a fixing and a stationary drive and provided in the drive train between the stationary drive and co-rotating actuator and / or fixing a separator is. Rotor judge according to claim 38 or 39, characterized in that the stationary drive has a plurality of adjustment positions in which it can interact with different actuators and / or fixations in each case. Rotor judge according to claim 40, characterized in that the stationary drive has a linear adjusting device, via which a drivable connecting member which can connect the stationary drive with the actuator or the fixing, axially along the straightening rotor is displaced. Rotor straightener according to claim 37 or 41, characterized in that the connecting member comprises a rotary drive. Rotor judge according to one of claims 34 to 42, characterized in that the stationary drive can be brought into operative connection both with an actuator and with a balancing drive. Straightening process with a straightening rotor, characterized in that during straightening the imbalance of the straightening rotor is measured. Straightening method according to claim 44, characterized in that during straightening balancing masses are adjusted according to the measurement result. A straightening method according to claim 44 or 45, characterized by the definition of a center of gravity axis. Straightening method according to one of claims 44 to 46, characterized in that the center of gravity axis is aligned with a rotational axis of the straightening rotor. Straightening method according to one of claims 44 to 47, characterized in that at standstill of the straightening rotor operatively connected to an actuator and / or a fixation of the straightening element, then adjusted by targeted control of the drive, the straightening element, dissolved or fixed and then the drive and the actuator are disconnected. Straightening method according to claim 48, characterized in that the direction of rotation of the straightening rotor is maintained before and after the adjustment. A straightening method according to claim 48 or 49, characterized in that a workpiece is arranged in the straightening rotor during the adjustment. Straightening method according to one of claims 48 to 50, characterized in that the straightening rotor is moved before adjusting in an adjustment position. Straightening method according to claim 51, characterized in that at least two adjustment positions are provided. Straightening method according to one of claims 44 to 52, characterized in that at standstill of the straightening rotor operatively connected to a balancing drive of a balancing element, then positioned by targeted control of the drive balancing element and then the drive and the balancing drive are separated. Straightening method according to claim 53, characterized in that the direction of rotation of the straightening rotor is maintained before and after the positioning. Straightening method according to claim 53 or 54, characterized in that a workpiece is arranged in the straightening rotor during the positioning. Straightening method according to one of claims 53 to 56, characterized in that the straightening rotor is moved before positioning in a balancing position. Straightening method according to claim 56, characterized in that at least two balancing positions are provided.

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