EP0911092B1 - Device and method for depositing wire-windings on a conveyor-belt - Google Patents

Abstract

Wire coils (2) laid onto a conveyer (5) are positionally controlled relative to the center line (10) of the conveyor track. The apparatus includes a coil layer (1), a sensor (7) to establish the position of the coils on the conveyor track, an adjuster mechanism (1, 3, 6) for influencing the position of the coils on the conveyor track, and a control unit (8) which governs the action of the adjuster mechanism (1, 3, 6).

Description

The invention relates to a laying process for wire windings on a conveyor belt with a belt center, in particular on a Stelmor conveyor belt, the Wire windings in an actual position with respect to the belt center position-controlled on the Conveyor belt are stored and the actual position by an optical sensor device is detected, and the winding of the wire by a winding layer takes place, which is at a variable speed around an axis of rotation rotates, changing the speed to control the actual position of the wire windings becomes. The invention also relates to an apparatus for performing the method.

In the prior art, when wire is rolled from billets, the rolled one The wire is deposited in turns on a Stelmor conveyor belt and cooled there. To as little as fluctuations in strength within the wire windings To keep it possible, they must be cooled evenly. This will be in the booth the technology has not yet been sufficiently guaranteed.

Document EP-A-0432 531 describes a depositing method and device for wire windings, the wire windings being position-controlled with With the help of an optical sensor device placed on the conveyor belt and their Location is corrected. Between the winding layer and the cooling and transport system a swiveling and / or displaceable winding feeder is arranged. This winding trailer is part of the cooling and transport system. He can have a heat-insulating hood and designed as a roller conveyor his.

The winding feeder has one at the transition to the cooling and transport system Joint training on. At the transition to the winding layer is a rolling or sliding support arranged for the winding trailer, at least at a side wall of the winding trailer closest to the winding trailer attacks a displacement device. The drive of the conveyor rollers of the winding trailer can be a speed-adjustable drive unit. The cooling and transport system can be a measuring device directed at the wire windings, preferably be assigned a photo-optical measuring device, which with the Sliding device is connected in terms of control technology.

Document FR-A-2 459 085 discloses an apparatus for producing Metal wire, formed as a semi-finished product in the form of coils, comprising a plant for the successive production of wire sections of a length that is needed to form a wrap. The necessary scissors in the wire stretch is arranged at an intermediate point of the device at which the wire has not yet reached its top speed, and being an automatic Regulating loop between the scissors and the aforementioned device for Looping is arranged.

The control loop includes a photo-electric detector upstream of the Scissors in the wire path, and includes a circuit for the output of signals to trigger the scissors, the start of which starts within a time interval after detection of the wire by a detector in cooperation with the reference signal.

Document DE-A-3 537 668 describes an adjustment device for wire emerging from a rolling mill and to be cooled in the form of turns. The winding layer is inclined forwards with its axis and the last section of the conveyor belt is inclined backwards with respect to the horizontal.
The position of the winding layer means that the wire windings to be deposited are deposited in an increasing manner when viewed in the transport direction.
A perfect entrainment of the wire windings is not guaranteed.

In the wire storage according to document GB-A-1 152 152, wire loops, also rising in the direction of transport, stored, sideways back and forth alternately filed and aligned between guide rails, which is a high technical effort means.

Starting from the aforementioned prior art, the object of the invention is based on a depositing method and the corresponding depositing device to be improved so far that with these uniform cooling the wire turns can be reached on the conveyor belt.

This task becomes in the generic term in a laying process for wire windings of type mentioned with the invention in that the Wire winds first on a steep ramp with one opposite the horizontal changeable angle of inclination and from there to Conveyor belt are transported and that to regulate the actual position of the Wire turns the angle of inclination of the ramp is changed.

This method ensures that the wire turns with respect to the The center of the belt is placed on the conveyor belt in a position-controlled manner.

An embodiment of the depositing method according to the invention provides that the wire windings when transported on the ramp by laterally adjustable Guide rulers are guided on both sides, and that to regulate the Actual position of the wire turns the position of the guide rulers is changed.

To carry out the method, the depositing device is equipped with a Coiler for depositing wire turns on the conveyor belt with a sensor device for detecting the position of the wire turns on the Conveyor belt, with actuators to influence the actual position of the wire windings on the conveyor belt and with a controller that feeds the actual and target position are determined and from their difference an actuating signal for an actuator and outputs to this. The actuator is according to the invention as the conveyor belt upstream sloping ramp with one opposite the horizontal changeable angle of inclination, and the actuating signal is the angle of inclination the ramp.

Further embodiments of the device provide that the actuator as the Ramp assigned laterally adjustable guide rulers is formed, and that the positioning signal is the lateral position of the guide rulers.

And finally, one embodiment provides that the actuator is variable in speed Winding layer is formed, and that the control signal the speed of the turntable.

The measure according to the invention and the further configuration of the Device can be a defined position of the wire turns on the conveyor belt to reach. In view of this defined location, cooling flows can therefore be such be coordinated and directed so that there is even cooling of the Wire turns results. Conversely, with a known cooling flow, the position of the Wire windings are regulated so that there is even cooling results

For example, as a sensor device for detecting the actual position of the wire windings an ultrasonic or infrared sensor can be used. As special An optical sensor device, for example, has proven suitable can be designed as a CCD camera.

The wire turns are deposited on the conveyor belt by means of a Winding layer, which rotates at a speed around an axis of rotation, wherein the speed is changeable. The wire windings are from the coil layer first placed on a ramp, one opposite the horizontal Inclination angle includes. The wire turns continue from the ramp transported to the conveyor belt. The angle of inclination of the ramp can be changed. On the ramp and / or the conveyor belt there are laterally adjustable guide rulers arranged, which the deposited on the ramp or the conveyor belt Guide wire turns laterally. To control the actual position of the wire windings can optionally choose the speed of the winding layer, the angle of inclination the ramp and / or the bearings of the guide rulers are changed.

Fig. 1

ein Stelmor-Transportband mit einer Ablegevorrichtung für die Drahtwindungen von der Seite,

Fig. 2

ein Stelmor-Transportband mit einer Ablegevorrichtung für die Drahtwindungen von oben und

Fig. 3 und 4

je eine optische Sensoreinrichtung zum Erfassen der Ist-Lage der Drahtwindungen.

Further details emerge from the following description of an exemplary embodiment.
The following are shown in a schematic representation:

Fig. 1

a Stelmor conveyor belt with a depositing device for the wire windings from the side,

Fig. 2

a Stelmor conveyor belt with a depositing device for the wire windings from above and

3 and 4

one optical sensor device each for detecting the actual position of the wire windings.

1 and 2 is shown by a not shown A wire is fed to the billet rolling mill. The wire has a diameter between z. B. 5 and 19 mm. This wire is turned by the winding layer 1 Wire windings 2 shaped and placed on a ramp 3. From there it gets over Transport rollers 4 transported on a Stelmor conveyor belt 5. The wire turns 2 are by means of guide rulers arranged on the side of the ramp 6 laterally guided.

At the beginning of the Stelmor conveyor belt 5 there is an optical sensor device 7 arranged. The optical sensor device 7 is designed as a CCD camera. It therefore has a large number of light-sensitive elements arranged side by side Cells on. The sensor signal of the sensor device 7 is fed to a controller 8. The controller 8 is also controlled by a higher-level simulation computer 9 a target position for the wire windings 2 supplied.

The controller 8 determines from the sensor signal of the optical sensor device 7 an actual position of the wire windings 2. The accuracy of the actual position is thereby the resolution of the optical sensor device 7 in connection with the width of the Stelmor conveyor belt 5 given. With a number of 2200 pixels the optical sensor device 7 and a transport width of 1.5 m results, for example a resolution of less than one millimeter.

From the difference between the specified target position and the determined and calculated The actual position of the wire windings 2, the controller 8 calculates a control signal for Actuator to adjust the actual position to the target position. As a rule, should the wire windings 2 in the center with respect to a belt center 10 of the Stelmore conveyor belt 5 are stored with a specific winding diameter.

In order to deposit the wire turns 2 by the winding layer 1, this turns with a variable speed n about an axis of rotation 11. The position of the Wire turns 2 on the Stelmor conveyor belt 5 can, for example, by Changing the speed n of the winding layer 1 can be influenced. This is particularly so with a diameter of the wire less than 12 mm advantageous.

Changing the speed n of the winding layer 1 affects in addition to the actual position the wire turns 2 also the turn diameter. A regulation on the Speed n of the winding layer is therefore only possible within narrow limits.

The ramp 3 includes an angle of inclination α with the horizontal. alternative and / or in addition to regulating the speed n of the winding layer 1, the Actual position of the wire windings 2 also by influencing the angle of inclination α the ramp 3 and / or the lateral position s influenced by rulers 6 become. This is particularly the case when the diameter of the wire is greater than 10 mm advantageous. This is particularly the case with smaller wire diameters Danger that the wire windings 2 through during a lateral displacement deform the guide rulers 6.

1 and 2 and also in FIG. 3, the optical sensor device 7 is as CCD camera 7 formed, which extends over the entire width of the Stelmore conveyor belt 5 extends. Such a sensor device 7 is in particular then makes sense if it is not known beforehand which part of the Stelmore conveyor belt 5 should be covered with wire turns 2.

As a rule, however, the wire turns 2 over a large part of the bandwidth of the Stelmor conveyor belt 5 placed With a bandwidth of z. B. 1.5 m winding diameters are typically in the range between 1.3 m and 1.45 m. It can therefore be less expensive than a CCD camera 7, which can be extends across the entire width of the Stelmor conveyor belt 5, two CCD cameras 7-1 and 7-2 to be used, which are the left and right margins, respectively of the Stelmor conveyor belt 5. This situation is in Fig. 4 shown schematically. The two CCD cameras 7-1 and 7-2 capture z. B. the each outermost 30 cm of the Stelmor conveyor belt 5, which is a total width from Z. B. 1.5 m.

The CCD camera 7 (according to FIG. 3) or the CCD cameras 7-1, 7-2 (according to FIG. 4) deliver up to 100 signals per second to the controller 8. The number of signals from the detection of a wire turn 2 to the next wire turn 2 thus results directly the time between the detection of two wire turns 2. In connection at the speed at which the wire turns 2 on the Stelmore conveyor belt 5 are conveyed, the geometric distance thus results the wire turns 2 on the Stelmor conveyor belt.

In the given embodiment, single-line CCD cameras 7, 7-1, 7-2 used. Alternatively, you could of course use a multi-line CCD camera 7 or multi-line cameras 7-1, 7-2 are used. The term "Multi-line" means that the camera 7, 7-1, 7-2 in question has a plurality of parallel ones Rows, which are each over the wide or the edge area of the Stelmor conveyor belt 5. When using multi-line Cameras 7, 7-1, 7-2 can of course take the distance between the wire windings 2 from one another directly by evaluating a single, then two-dimensional sensor signal be determined.

The depositing method according to the invention and the corresponding depositing device have been described above in connection with a Stelmor conveyor belt 5 described. But it can also be used with other conveyor belts serve to position the wire windings 2 on the conveyor belt in a precise position is required or desired.

LIST OF REFERENCE NUMBERS

1

laying head

2

wire windings

3

ramp

4

transport wheels

5

Stelmor conveyor belt

6

material guides

7

optical sensor device

7-1, 7-2

CCD cameras

8th

regulator

9

higher-level simulation computer

10

mb

11

axis of rotation

α

Meigungswinkel

n

rotational speed

s

lateral position

Claims (5)

1. A laying method for laying down wire coils (2) on a conveyor belt (5) with a belt center (10), in particular, a Stelmor conveyor belt (5), wherein the wire coils (2) are laid down on the conveyor belt (5) in an actual position such that their position referred to the belt center (10) is controlled and the actual position is measured by means of an optical sensor device, wherein the wire coils (2) are laid down by a laying head (1) that rotates about an axis of rotation (11) with a variable speed (n), and wherein the speed (n) is varied in order to control the actual position of the wire coils (2),
   characterized by the fact

   that the wire coils (2) are initially laid down on a sloping ramp (3) that is inclined relative to the horizontal line by a variable angle of inclination (α) and then transported from the ramp to the conveyor belt (5), and by the fact

   that the angle of inclination (α) of the ramp (3) is varied in order to control the actual position of the wire coils (2).
2. The laying method according to Claim 1,
   characterized by the fact

   that the wire coils (2) are laterally guided by means of laterally adjustable guide rails (6) during their transport onto the ramp (3), and by the fact

   that the position of the guide rails (6) is varied in order to control the actual position of the wire coils (2).
3. A laying device for correctly laying down wire coils (2) on a conveyor belt (5) with a belt center (10) in an actual position, in particular, for carrying out the method according to the invention,

   with a laying head (1) for laying down the wire coils (2) on the conveyor belt (5),

   with a sensor device (7) for measuring the position of the wire coils (2) on the conveyor belt (5),

   with actuators (1, 3, 6) for influencing the actual position of the wire coils (2) on the conveyor belt (5), and

   with a controller that receives the actual and nominal positions, wherein said controller determines an adjusting signal for an actuator (1, 3, 6) from the difference between the actual and the nominal position and forwards this adjusting signal to the actuator,

   characterized by the fact

   that the actuator (3) is realized in the form of a sloping ramp (3) that is arranged upstream of the conveyor belt (5) and inclined relative to the horizontal line by a variable angle of inclination (α).
4. The laying device according to Claim 3,
   characterized by the fact

   that the actuator (6) is realized in the form of laterally adjustable guide rails (6) that are assigned to the ramp (3), and by the fact

   that the adjusting signal defines the lateral position of the guide rails (6).
5. The laying device according to Claim 3 or 4,
   characterized by the fact

   that the actuator (1) is realized in the form of a laying head (1) with variable speed, and by the fact

   that the adjusting signal defines the speed (n) of the laying head (1).

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