DE102008040726A1 - A method for changing roles in a winding device and apparatus for carrying out the method - Google Patents

Abstract

The invention is based on a method for changing roles in a winding device, which has at least one winding position, and in which a follower roll is transported by means of a transport unit from a storage to the winding position, based on the fact that at least one agent is present that at least temporarily detects the position of the follower roller, or a vulnerable portion thereof, even before reaching the winding position. The invention further relates to a device for carrying out the method.

Description

The The invention relates to a method for changing roles in a at least one winding position having winding device in which a follower roll by means of a transport unit from a storage is spent in the winding position. The invention further relates a device for carrying out of the procedure.

The Invention will be described below with reference to a paper web as an example for one Material web described. However, it is also on other material webs applicable to similar Way can be handled. Furthermore, the winding device is based on a settlement in a Slitter described. However, the invention is also Applicable to other winding devices where rollers within a winding station take a winding position and changed become. It goes without saying that the invention also provides methods for changing roles at Aufwickelpositionen encloses. Under a role of change is understood in the following that role, at the beginning of the change process still in the winding position a winding station is located and during the change process is replaced by a roller, here referred to as a follower roller becomes. To make the production process of paper production so efficient as possible To make, one strives to broadest possible paper webs with as possible to produce high speeds. The resulting paper webs are used for further processing in the paper mill, or for transport except House wrapped on hubs. Under roles understands the present Writing all in paper production, paper finishing and paper processing for use coming rotatable production means, so paper web rolls and their hubs, in particular Volltamboure and finished rolls or empty bobbins and sleeves.

Under a means that captures the position of the follower role at least temporarily can understand the present document optical, acoustic, electromagnetic Sensors, their actuators, as well as buttons, feelers, gauges and image-generating Institutions.

One in the winding at the end of the paper machine resulting full tambour can today with web widths to be wound of up to 10.5 m, depending on the type of paper size Reach diameter. For newsprint, for example Diameter wound around 3 m, with heavy paper or cardboard even up to 4.5 m. By contrast, more sensitive paper types only achieved smaller roll diameter.

For the transport except House and a manageable further processing, for example in printing presses, to enable The paper webs are in so-called slitters in longitudinal direction cut. There are two types of slitter machines known, the roller winder, where the individual, resulting finished rolls wound in a common winding bed and the backup roll cutting machines, the for Each ready-to-use roller has its own rewind station. However, both genera have the same conditions in principle at the settlement. The same applies to so-called transfer or doctor scooters, whose task is the rollout of full drumming, and to which can occasionally be trimmed. For the object The invention is therefore irrelevant, whether it is a settlement in a carrier roll cutting machine, a backup roll cutting machine or simply a so-called Um- or Doktorwickler acts.

to assembly the completion of the mentioned machine types with those at the end of Paper machine resulting full bambours are means of transport needed. Often if this is done by means of cranes, because elegant rail transport systems with their own conveyor stations due to their elaborate mechanics are very expensive and for example when replacing a slitter to the new conditions need to be adjusted. Usually is a warehouse between paper machine and slitter, especially a reel magazine, interposed, as compensation serves by production differences. These production differences already inevitably occur because of it because the paper machine is continuous and the slitter works discontinuously. Furthermore, speed differences can be achieved in this way as well as plan and Unscheduled downtime partly be compensated. Nevertheless, the slitter machines come with regard to maintaining the process speed of papermaking high importance too, since the slitter on each Case need to be able to to process the entire amount of paper submitted by the paper machine so that There are no production stoppages in the papermaking process can.

In order to replace a unwound in the development of the slitter Volltambour or the remaining, possibly still stocked with remnants, winding core by a full spool, which is located in the winding position reel spool or winding core must come to a standstill, unlocked and removed become. Furthermore, a means of transport must lift a subsequent full tambour from a warehouse, in particular a reel magazine, and move it to a position near the winding position, here called a pre-position drive, where the pendulum movements mentioned below have to calm down before the tambour can be moved into the free winding position and locked there. Only then can the unwinding process begin again.

To State of the art depends the success of the change process is very much dependent on the assets of Operator to coordinate the two movements properly. So try a machine operator the new reel to be inserted in the pre-position above the winding position to proceed while the reel to be replaced or reel still in the reel station he has to rely on his own judgment. Due to constructional Circumstances and often existing enclosure of the settlement as well as the fact that a on a crane befindlicher full or empty bambour at acting speed changes represents a pendulum mass, such a procedure has a considerable Collision risk and is to avoid consequential accidents in almost strictly prohibited to all paper mills. Accordingly, done According to the prior art, the movements described involved in the change process Paper web rolls or winding cores largely separated one after the other, which inevitably leads to a relatively long shutdown of the slitter.

task The invention is the change of roles of roles at a winding position shorten in time and safer.

These The object is achieved in a method of the type mentioned in the present invention that there is at least one means of determining the location of the follow-on role, or one at risk Section thereof, even before reaching the winding position at least temporarily recorded.

On In this way it is possible for the operator of such a device, the for the Change of roles needed To reduce time expenditure significantly, since the change already while still ongoing settlement can be initiated. This increases additionally the security of the exchange process.

In an advantageous variant can with the method according to the invention the position of the follower roll is continuously recorded. The way The data obtained provides an ideal basis for operating the Change process and allow a particularly high level of security, because the location of the role not only at significant points of the change process but the path of the roles, at least in sections, continuously monitored becomes.

On the other hand can also be a process variant of high practical importance that captures the position of the follower roll at intervals. Such a procedure can already guarantee an absolutely sufficient level of security. Also can the one for that to be provided on a winding device means for detecting the Position of the follower roll in an uncomplicated manner at a suitable location be attached.

The The aforementioned method variants also make it possible for the position the follower roll over at least one predefined route section recorded accompanying becomes.

there lets in inventive method Design variants, according to which the change process is controlled or regulated.

Next the fundamental Possibility, that the at least one means perceptible to the operator Activate signals, particular procedures are provided which provide for the electronic processing of the detected parameters and in particularly preferred variants, a user-free or permit largely operator-free operation.

This allows especially short reaction times of the system and includes human Failure. About that In addition, a high reproducibility of the processes is guaranteed. Further advantages result from the electronic links surrounding control systems, for example an upstream one Tambo characterization or monitoring units for the Production speed before or after processing stations, as well as with parent Control systems, such as the overall monitoring of incoming or imminent business interruptions. About that In addition, a worker can largely out of the possible Hazardous area be released.

In In another preferred method, the collected data, in particular position values, used by a collision of the roles to be changed to avoid. In this way, expensive production losses can be avoided and guarantee the integrity of the rolls. Finally, a Source of danger for Machine and human eliminated.

Furthermore, a method according to the invention can be configured particularly advantageously if the acquired data, in particular position values, are used to shorten the change process in terms of time. This is especially important in terms of increasing process performance and becomes possible because of the collected data then waive unnecessary safety instructions, such as described above stay in waiting positions outside the settlement, can dispense. By a method according to the invention, it is possible to bring the follower roller close to the winding position with still rotating in the winding position changing role. In particular, this makes it possible to spend the following role in a pre-position, which is preferably above the winding position. Here, the follower roller may already settle in case of any pendulum movements and must be lowered after ejection of the change role from the winding position only in this.

at a method of the invention can Advantageously, the at least one means activate signals, which are used to at least one degree of freedom and / or the transport speed of the following roller and / or its transport unit at least temporarily influence.

Especially the signal can be used to control the transport movement of the Follower role on their way to the winding position to stop or at least to influence in certain directions, such as forward, backward, upward, downward, about to block or release again, or to delay or to accelerate.

On this way, the following role, bypassing possible collision hazards be brought into the winding position in a safe and fast way. Furthermore, due to the existing signaling, directly assumed a creeping speed before reaching the winding position be to the following role particularly gently in the winding position contribute.

Further a method according to the invention is advantageous designed, if the following role in compliance with previously defined safety distances is introduced into the winding position.

To can the safety distances Machine-bound programming and the operator on a case-by-case basis a certain choice when defining the safety distances to be set. About that In addition, it is conceivable that safety distances against moving parts, especially against the still rotating and / or already out the winding position removing alternating role, are greater than the safety distances against dormant components. In general, the use of defined safety distances has one increase the security against collision result and leaves with a suitable choice one higher Tolerance of other functional processes to.

Of Furthermore, the respective orientation of the at least one agent invariable in space or at least temporarily changeable be. This offer depending on the structural condition of the winding device invariably designed in their orientation Means for detecting the position or the position of the follower roller one particularly price-oriented solution, because the needed Components are inexpensive in itself and no additional structural measures required are. About that In addition, signal processing of such components is not expensive Software needed. In other cases can the wishes the operator of such winding devices, or the framework conditions, In particular, the structural characteristics so fail that the use at least temporarily changeable Medium is required.

Prefers can in your orientation at least temporarily modifiable means of recording the position or position of the follower roll during the change process or before that and / or twisted and / or pivoted.

Furthermore can Such means are particularly easy to adapt to changing circumstances. As well It is conceivable that, in particular due to structural conditions the orientation of the at least one means for the fulfillment of the asked Tasks changeable is. That way the effectiveness significantly increase the cost of individual resources and the task of continuous monitoring can be done in a particularly good way.

It is an advantage if in the presence of several resources the Alignment of at least two means different. To this Way is it possible to monitor the space in more than one dimension. In particular, so can Also created arbitrarily in the space lying Sicherheitssebnen and / or security rooms become.

there it is of particular advantage if at least one agent substantially in machine direction and at least one means substantially transverse aligned to the machine direction to easily a high level To create security.

Preferably find as means for detecting the position or position of the follower roll optical, acoustic or electromagnetic devices application.

In an optical device imaging devices, light or laser sensors, in the acoustic devices ultrasonic, infrasound, in the electromagnetic devices radar or microwave sensors are preferred. A light or laser device offers the advantages particularly low-cost components, simple processing software and the possibility of visible functional verification. An optical device generally offers the advantage of high focusability of the objects to be monitored.

Furthermore offer imaging equipment, especially cameras, the advantage that the capture of the object, here the sequential role, in particular Mass meaningful is, and a particularly sound basis for monitoring, and in particular an associated control or regulatory intervention offers.

A On the other hand, the acoustic device can be designed in such a way that the sensor at the same time the receiver is. This can under certain structural conditions of great advantage be. As the sound waves propagate in space, it is also conceivable that an acoustic device suitable for direct Distance measurement, in particular between the moving parts, especially between the roles involved in the change, used becomes.

at the use of electromagnetic sensors, however, can be particularly good the material differences of the components to be monitored, for example the wrapped paper web and the surrounding steel ones Machine components, exploited, in addition to their density also their electronic and magnetic conductivity on the for detection influence the resonance behavior used.

Independent of the sensor array will be with appropriate sensor alignment and signal processing Notes on the movement speeds involved in the change Given roles.

In a particularly preferred application of a method according to the invention if the winding device is a slitter-winder, because of the slitter machines in terms of maintenance the process speed of papermaking is very important due. After subtracting the buffer capacity from the warehouse, the Process performance of the slitter should be at least as high as that of the paper machine, which is why it saves time when changing reels is of particular importance here.

In a very specific preferred application of a method according to the invention If the winding position is an unwinding position. This is particularly advantageous in a slitter-winder since the winding change due to the high masses to be moved here generally longer lasts as the change of the partial web roles involved in the winding.

Device is the reproduced above task achieved in that means provided are suitable, which are a freedom of movement for the follower role on their way to the winding position. It is called as Movement space understood that area in which the follower role is movable collision-free on its way to the winding position, it does not matter if the space for movement is closed, or is open to at least one side. For example, under a freedom of movement also over one, for example inclined or curved, Level area are understood.

A Such device offers excellent conditions for a fast and safe change of rollers at a winding position.

Becomes the freedom of movement, for example by means of an image-forming Detected device or sensors and actuators, so it is around an imaginary one Movement clearance, preferably in conjunction with a suitable Control / regulation unit becomes effective, which at least indirectly on at least one degree of freedom and / or the transport speed the following role and / or their transport unit at least temporarily influence can take. It can through the available movement clearance already taken into account desired safety distances be. In this way, the device becomes the underlying Task especially well.

In particularly preferred embodiments can for detecting the movement clearance, the follower roller detecting Means movable, displaceable, rotatable and / or pivotable be. The freedom of movement can thus over the period of movement the following role unchangeable or changeable be. As a rule, there is a freedom of movement on a winding device be clearly definable and can thus be formed unchangeable. A changeable one Space for movement is to be considered possible incidents of Advantage. It is the use of imaging devices conceivable that in addition to the follow-on role, other parts are detected, their possible Lay the freedom of movement of the following role at least temporarily restrict can.

Further Features and advantages will be apparent from the dependent claims Related to the description and the drawings.

The Invention will be described below with reference to exemplary embodiment with reference closer to the drawings explained. Showing:

1 a schematic representation of a method according to the invention with reference to a suitably arranged settlement, with the follower role is in a waiting position outside the settlement

2 the same method, wherein the following role is introduced into the settlement and has reached a predetermined by a sensor safety distance

3 the same method, wherein the follower roller has reached its preposition above the winding position

4 a schematic representation of a device according to the invention with two imaging devices for monitoring the follower role and stored in a computer record that defines a space for movement of the follower role

In the 1 to 3 a device for carrying out the method according to the invention is described on the basis of a transaction ( 1 ). To simplify matters, a coordinate system has been entered in the lower right-hand screen area. Its x-axis points in the machine direction, the y-direction indicates the transverse direction, ie the width of the system, while the height is in the z-direction.

In the winding station ( 2 ) rotates a change roller ( 7 ) in its winding position ( 2a ), whereby continuously material web ( 9 ) unwound from her and the connected processing station, such as a cutting section, not shown, is supplied. On a housing component at or near the winding station ( 2 ) is a first sensor ( 6 ), which in the example shown is aligned counter to the machine direction (x). Falls below in the winding position ( 2a ) exchange roller ( 7 ) now due to the unwinding process described above a predefined diameter, the sensor ( 6 ) receive an optical, acoustic or electromagnetic signal. It is irrelevant whether the sensor ( 6 ) also acts as an actuator or receives the signal from a suitably positioned, corresponding actuator.

In the present example, the sensor ( 6 ) now a release signal, which is passed directly to a computer unit, not shown, which indirectly or directly on the transport movement of the follower role ( 8th ) And the transport of the follower role ( 8th ). It is not important for the process according to the invention whether the follower roll ( 8th ) is then taken from an upstream storage, not shown, or is already in a waiting position ( 10 ) located in the machine direction (x) outside the settlement, but at least in front of a sensor ( 5 ) lies.

The second sensor ( 5 ) is aligned here in the transverse direction (y), so that for the on the winding position ( 2a ) to be moved following role ( 8th ) a kind of hurdle arises. Captures the sensor ( 5 ) the follow - on role on your way to an in 3 represented position ( 11 ) above the winding position ( 2a ), forward and downward movements are immediately blocked. The transport unit of the follower role ( 8th ), here the crane ( 4 ) is then only able to perform backward and / or upward movements until the sensor ( 5 ) the way to the winding station ( 2 ) releases again. The position of the second sensor ( 5 ) so adjusted that in the z-direction a safety distance (s) between the roles involved in the change process ( 7 . 8th ). Depending on the embodiment, this safety distance (s) the fact that the diameter of the interchangeable roller ( 7 ) during the transport time of the follower roll ( 8th ) of sensor ( 5 ) in the preliminary position ( 11 ) continues to be adjusted. In one extreme example, it may therefore be possible for the sensor ( 5 ) in the height direction (z) below the sensor ( 6 ) is attached.

It it is obvious that it is also within the scope of the invention to provide further sensors which are suitable for determining the position of the following roller, but at least more vulnerable To capture sections of the follow-on roles. In particular, at the use of means of transport running on stationary rails, especially cranes, the one deviation of the transport path in the y direction largely exclude, also find sensors that are specifically designed to determine the Situation regarding the Z axis are suitable. It can For example, particularly inexpensive solutions Here is a tactile or sensing device provide. Such a facility may be in collaboration with a corresponding control or regulating device for one, the forward motion superimposed Lower the follower roller until the follower roller engages the feeler or feeler not touched anymore.

As well it goes without saying that the appropriate positioning of the means is also a positioning may include at the transport of the following role.

In this way, a safe movement of the follower roll ( 8th ) into a position ( 11 ), which here above the winding position ( 2a ) is guaranteed. In the preliminary position ( 11 ), the follow-on role ( 8th calm down). Parallel to this, the rotational movement of the exchange roller ( 7 ) and the roll ( 7 ) can from the winding position ( 2a ). The in the position ( 11 ) follower role ( 8th ) has inclusive of bridging safety distance (s) only a small way to the winding position ( 2a ) to overcome. Preferably, the follower role ( 8th ) only substantially perpendicular to the winding position ( 2a ) moved down and locked there. The short path takes very little time, so that the entire change process is significantly shortened.

practical Experiments have shown that an otherwise usual roll change at the Unwinding of a slitter-winder at a mother roll width from about 8 m a total time savings when changing roles of more can result in a minute. When working commercially Newsprint is the standard for changing reels on a slitter rewinder at about one change per hour. Now every change requires approx. 1 minute less time and is produced around the clock, results a time saving of about 24 minutes a day. That means, that about a third to a half roll processed more per day can be. To the same performance increase through higher production speeds to achieve the production speeds of today's slitters in the continuous load range by approximately 100 meters per minute can be increased, which is not insignificant Increase in annual energy demand.

Another advantage of the short introduction path, from the pre-position ( 11 ) in the winding position ( 2a ) is that the follower role ( 8th ) very slowly and therefore gently into the winding position ( 2a ) can be introduced. It may be particularly advantageous if in the immediate vicinity of the winding position ( 2a ) another sensor the feed rate of the follower roll ( 8th ) can delay after their detection.

Does the follower roll have the winding position ( 2a ), can continue to be produced and the follow - on role becomes the role of change in the next change process.

This in 4 illustrated embodiment of a device according to the invention shows in the left part of the figure, the structurally existing device with two cameras ( 13 . 14 ) as image-forming devices. In the right part of the figure, the image of a, the freedom of movement defining record is shown. About the indicated in the lower part of the figure computer unit ( 15 ), the captured position / actual data of the follow-on role ( 8th ) constantly compared with the stored freedom of movement.

The particular advantage of such a change process is that by the superposition of several, here two, cameras ( 13 . 14 ) a three-dimensional image can be generated and a computer unit ( 15 ) is comparable. In addition, additional cameras or sensors may be provided.

From the illustrated embodiments may deviated in many ways, without the basic idea to leave the invention.

1

completion

2

winding station

2a

winding position

3

magazine for hubs, interim storage

4

Transport Equipment / Crane

5

sensor

6

sensor

7

changing role

8th

follower roller

9

unwound web

10

waiting position

11

pre-position

12

Freedom of movement

13

camera

14

camera

15

computer unit

X

machine direction

Y

transversely

Z

height direction

S

safety distance

Claims (15)

A method for changing roles in a winding device having at least one winding position, in which a follower roll is transported by means of a transport unit from a storage in the winding position. characterized in that at least one means is present, which detects the position of the follower roller, but at least one vulnerable portion thereof, at least temporarily before reaching the winding position. Method according to claim 1, characterized in that that the position of the follower roll is detected continuously. Method according to claim 1, characterized in that that the position of the follower roll is detected discreetly. Method according to claims 1-3, characterized that the change process is controlled and / or regulated. Method according to one of the preceding claims, characterized characterized in that the acquired data, in particular position values, be used to avoid a collision of changing roles. Method according to one of the preceding claims, characterized characterized in that the acquired data, in particular position values, be used to shorten the change process in time. Method according to one of the preceding claims, characterized characterized in that the at least one means activates signals, which are used to at least one degree of freedom and / or the transport speed of the following roller and / or its transport unit at least temporarily influence. Method according to one of the preceding claims, characterized characterized in that the follower role in compliance with previously defined safety distances is introduced into the winding position. Method according to one of the preceding claims, characterized in that the respective orientation of the at least one By means of in the room invariably or at least temporarily changeable can be. Method according to one of the preceding claims, characterized characterized in that, in their orientation at least temporarily changeable means, before and / or during the change process process and / or twisted and / or pivoted can. Method according to one of the preceding claims, characterized characterized in that the data-collecting means is an optical, acoustic or electromagnetic, in particular light or laser, Ultrasonic, radar or microwave sensor application finds. Method according to one of the preceding claims, characterized in that the winding device is a slitter-winder is. Method according to one of the preceding claims, characterized in that the winding position is an unwinding position is. Device for winding a material web ( 9 ), in particular paper web, the at least one winding position ( 2a ) having winding station ( 2 ), in which a change roller ( 7 ) by a follower role ( 8th ), characterized in that means ( 5 . 6 ) are provided, which are suitable for movement ( 12 ) for the follower role ( 8th ) on its way to the winding position ( 2a ) capture. Device according to the preceding claim, characterized in that the movement of the following roller ( 8th ) taking into account the freedom of movement ( 12 ) is conductive.