DE3318031C2 - Method and device for controlling the pressure rollers of a tape reel that are influenced by cylinders that are actuated by pressure medium - Google Patents

Description

The invention relates to a method and a device for performing the method according to the Preamble of claim 1.

It is known that the pressure rollers operated by hydraulic working cylinders have a constant force for so long against the reel mandrel or against the

3 4

to press thorn reeled layers of tape until through fen, with which the control of the pressure rollers is more precise

Self-friction between the reel mandrel and the beginning of the strip and adapted to the

slip-free further winding of the tape takes place without the NEN criteria with which the damage to the

Force of the pressure rollers is guaranteed. During the beginning of the tape and the reel mandrel, there is

first strip layers changes the diameter of the coil s is avoided, and with the blows in the plant as a result

in the area of the tape tip in each case with the beginning of a new run-in of the tape tip for both single and

en strip position abruptly by the amount of the strip thickness. multiple layers are also avoided or a harmless

The pressure rollers with adjusting cylinders can be reduced to this size.

The jump in diameter due to their inertia only takes place under the invention. The contact pressure er io in the characterizing part of claim 1 ranges in this case such a size that the pressure rollers proposed methods written.
Markings on the tape surface, namely in the This process provides a basis for the exact amount of tape tip left. te control of the pre-positioned pressure rollers

The generic invention (DE-AS 21 58 721) by that the actual position of the tape tip with suggests to prevent this a decrease in value 15 is detected with the help of non-contact sensors markings on the tape and during the entire first turn around the tape surface to control the pressure rollers so that it is followed by the reel mandrel. The position of the tip of the tape adjusted back by the amount of the strip thickness is not carried out in this proposal of the invention before they are influenced by the diameter slip between the reel mandrel and pressure rollers of the coil causing the strip tip is passed so that an unadulterated signal for the control the. Accordingly, according to the proposal, the pressure rollers can be obtained, each of which is ; State of the art of the reel mandrel with an impulse path of the beginning of the tape switched to contact pressure coupled, which works with a pulse counter. In this way, especially with thin connections which, after reaching the slipping ligaments, avoid ligament constrictions by free contact of the tip on the reel mandrel in operation, the build-up of the tensile force takes place gently because an attachment will. After each further turning of the reel pressure force, the rr.materialspecipeldorns can be adjusted is adapted to the material by the amount of the distance between two adjacent ones

In a further development of the invention, a signal is generated in the pulse counter a control logic suggest a control element for lifting that the gap between the roller and the mandrel 30 material thickness plus a tolerance surcharge, which speaks about lifting by the amount of the band, whereby the surcharge thickens in the direction of passage is intended to take a kind of inlet funnel between

The known solution has several disadvantages. That adjusted with the reel mandrel and pressure rollers, the one

Infeed speed in the threading of the tape tip, which is better with Vorlaufgeschwindig-, is used by the fact that

The wedge-driven reel entering the strip is between the gap larger than the expected material thickness

see reel and pressure roller in a gap is set, blows when running in the belt

ldemmt, which according to the suggestion of the state of the art and the first turn around

nik should be about 10% smaller than the tape thickness, so that the tape is spared and improves

This not only results in a strong impact in the service life of the pressure rollers and Fühningseinricn-

System; the speed of the reel will also result in downgrades.

tormented between the first pressure rollers and the invention allows according to one embodiment The beginning of the tape jammed in the reel slips on the reel mandrel with an opposite of the infeed reel by, with corresponding markings on the speed of the tape slight (3 to 3%) earth arise in the strip and on the reel mandrel. It is driven at increased speed, and that the the tape can be stretched or stretched so that it is 45 reel speed to tape speed Constrictions in width, streaks and betrayal will be discontinued if at least the first pressure roller can see the tape coming. It is to be expected that the initial pressure has been switched to A relatively large area of the beginning of the tape is waste, the funnel-shaped tape inlet depicted in connection in addition, the service life of the reel mandrel is considerably impaired with the control of the pressure according to the invention. In addition, if the pressure rollers are inclined, it can be formed after the belt has passed through Ribbon point for pulling this point at an angle allows a gentle ribbon inlet, which in turn does not come what a telescoping of the tape with high overfeeds between tape and reel wideners Wrapping process causes speed required This results in

After all, detecting the position of the tape tip is only possible with low slip values and therefore no damage.

not exactly possible with the prior art, because of the 55 gene of the tape requirement.

Time at which the belt and mandrel are synchronized. According to a further embodiment of the invention has occurred, so the slip has not stopped it is suggested that from the incoming tape Ultimately, it should be mentioned that a counter is used to record the number of duplications of tape passing through and folding, the beginning of the tape is started from the length and the pressure rollers to the reel-known device are not taken into account at all 60 mandrel are set to position as soon as the beginning can be so that by multiple layers of the tape is detected without contact that after a fixed tape tip Damage to the system Expected route the beginning of the belt is again is recorded without touching and the recorded in the counter

Based on the described prior art, tape length and the distance are compared and

and the problems and disadvantages described, "in the event of a discrepancy between the given path

the present invention is based on the task of generating a signal for the unstretched and measured tape length

ter avoidance of these disadvantages a method and a doubling of the distance between the pressure rollers

Device for carrying out the process to create and then reel mandrel by VersielJe-ni the pressure cylinder

linder is delivered. This is used in a favorable manner ensured that so-called "Doppler" of the ribbon tip, i. H. a tape tip folded backwards can be detected and the pressure rollers still in front Infeed of this double tape tip will be adjusted to the appropriate distance. Be that way Even in these not uncommon malfunctions, damage to the pressure rollers is reliably avoided.

In addition, if there is a multiple fold at the beginning of the tape, it is also provided that a is detected by a multiple folding of the tape impact on the first pressure roller and as Signal to increase the distance between the pressure rollers and the reel mandrel by one by one Material thickness increased value is fed to the pressure cylinders.

It is also proposed that after the beginning of the tape, the last pressure roller in the direction of tape travel has happened the same is optically detected and thereby emitted a signal to the first pressure cylinder is to the pressure roller by the value of a material thickness to adjust to the outside. The last pressure roller thus signals the end of the first winding layer and thereby causes the pressure roller to be adjusted to the second position. The gap between the pressure roller and the now wound-on first layer of tape is increased by the value of a material thickness, where appropriate Doppler already taken into account because of the first position should be taken into account accordingly.

According to another embodiment of the invention, after the beginning of the tape, the tape running direction last pressure roller has passed, the signal detected by the beginning of the tape to update the counter used on the actually run through tape length and another counter with which the revolutions of the reel are detected, is updated to a value corresponding to the angular amount that of the The position of the beginning of the tape corresponds to the start of the winding of the next tape layers The position of the beginning of the tape is signaled via the counter and the signal in the same way as the optical one Detection during the formation of the first tape length to regulate the pressure rollers or the pressure force is used.

Since the procedure employed with the invention prevents the slippage between the strip and the reel mandrel before termination which excludes the first winding position can be clearly identified with the help of the counter in the manner described determine the position of the tape tip on the reel mandrel, so that the further tracking of the tape tip to the Controlling the pressure rollers with the help of the counter is possible

Preferably, after the third rotation of the reel mandrel has been detected by the counter, the reel mandrel is activated spread and the pressure rollers are retracted by means of the pressure cylinder.

According to a further embodiment of the invention it is provided that the tape end is detected without contact the standstill position of the reel from the value of the counter plus a 180 ° rotation is determined and stored, as well as that from the number of the turns of the collar diameter is calculated and that then the pressure rollers on the position of the calculated half coil diameter and finally the reel on the saved Standstill position is braked, with each pressure roller is switched to pressure after each passage of the tape end the method proposed for the beginning of the tape also for detecting the end of the tape and positioning the Apply the end of the tape to the coil. The installation of the winding rolls and the control after the end positioning avoids a loose waistband after braking.

The device for performing the method then consists in that for contactless detection of the Optical sensors are provided at the beginning of the tape. These optical sensors are preferably direct arranged behind each pressure roller. In this way, the passage of the tape tip behind each pressure roller safely detect and thereby issue the corresponding control command.

In a particularly advantageous manner, the optical sensors are designed as infrared detectors that are used in the The prevailing conditions here (heat, dirt) are to be used particularly favorably because they directly affect the radiation from the warm beginning of the tape react.

A device for determining the multiple folds of the incoming strip consists of an accelerometer in the area of the first pressure roller. This accelerometer is in the Able to signal a shock and pass the signal on to control the pressure rollers.

The invention is explained in more detail below using an exemplary embodiment with reference to the drawing explained:

The facility consists of:

- Entrance driver TiI?

- Dorn DO

- Pressure rollers R 1 to R 4
- Employment A ί to A 4

- IR detectors IR 1 to IR 4, behind each position

- IR detectors IR 5 to IR 6 in the belt inlet

- Pulse generator / 1 with counter Z 1
- Pulse generator / 2 with counter ZT.

- Accelerometer G

function

The function can be broken down into sections that result from:

a) Detection and tracking of the beginning of the tape by IR detectors,

b) tracking of the tape by the counter Z 2 from the second turn,

c) Detecting and tracking the end of the tape and stopping it via the counter Z2

and the control and regulation functions derived therefrom.

The overall function is described in detail below:

The mandrel DO has a slight lead over the driver TR. The tape head exiting from the driver TK reaches the IR detector IR 5.

The counter Z 1 is cleared and the strip length recording is started.The settings A 1 to A 4 are switched to position control and set to the material thickness D with a tolerance allowance Xi to X 4 in a funnel shape, i.e. from A 1 to A 4 decreasing distances:

Ai = D + Xi

A2 = D + X2 A3 = D + X3 A4 = D + X4

The tape head has not yet reached IR 6:

If the value S t of the tape length in Z1 is greater than the distance between IR 5 and IR 6, i.e. ID, then there is a "Doppler".
The positions A 1 to A 4 are moved to double the material thickness 2D, with the tolerance surcharge and funnel-shaped design being retained.

The accelerometer G signals a shock:

There is a multiple fold. The pitches A ί to A 4 are run to a value increased by the material thickness D, ie in this case 3D.

The tape head reaches IR 1:

The tape enters the mandrel DO .

to

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20th

The tape head reaches IR 2:

The position A 1 is switched from position to P control (pressure control). The pressure roller R 1 is pressed against the material with a material-specific value; this value is used for regulation. The advance of the dome DO in relation to the driver TR is continuously withdrawn from here via an integrator. The withdrawal depends on the material speed and is scaled so that when the tape head reaches IR 3, the synchronism between mandrel DO and driver TR is achieved.

The tape head reaches IR 3:

The position A 1 is switched from position to P control The pressure roller R 2 is pressed against the material with a material- specific value.This value is controlled.The synchronization between mandrel DO and driver TR is achieved.Tension control (material-typical) is switched to

The tape head reaches IR 4:

The position A 1 is switched to position control and moved to the material thickness increased by D , i.e. normally to 2D . The position A 3 is switched from position to P control. The pressure roller R 3 is pressed against the material with a material-specific value. This value is regulated. The counter Zi is updated to the actual length of the strip. The counter Z2 is updated to 270 °. The further switching of the positions A 1 to A 4 takes place from here via the counter ZZ

The accelerometer G signals a shock:

There is a multiple fold greater than 3 times the material thickness 3D. The positions A 1 to A 4 switch to "quick opening".

The counter Z2 signals 360 °:

The position A 2 is switched from P control to position control and to the material thickness increased by D, i.e. normally to 2D,

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40

45 driven. Position A 4 is switched from position to P control. The pressure roller R 4 is pressed against the material with a material-specific value. This value is regulated

The counter Z 2 signals 450 °:

The position A 3 is switched from P control to position control and moved to the material thickness increased by D, i.e. normally to 2D. The positions A 1 and A 2 are switched from position to P control. The pressure rollers R 1 + R 2 are pressed against the material with a material-specific value. This value is used for regulation. From here on, three pressure rollers R 4, R 1 + R 2 are always switched to P control.

The counter Z 2 signals 540 °:

The position A 4 is switched from P control to position control and the material thickness increased by D, i.e. normally to 2D. The position A 3 is switched from position to P control. The pressure roller R 3 is pressed against the material with a material-specific value. This value is used for regulation.

The counter Z 2 signals 630 °:

The position A 1 is switched from P control to position control and moved to the material thickness increased by D, i.e. normally to 3D. The adjustment A 4 is switched from position to P control. The pressure roller R 4 is pressed against the material with a material-specific value. This value is used for regulation

The counter Z2 signals 720 °:

The setting A 2 is switched from P control to position control and moved to the material thickness increased by D, i.e. normally to 3D. The adjustment A 1 is switched from position to P control. The pressure roller R 1 is pressed against the material with a material-specific value. This value is regulated

The counter Z2 signals 1080 °, that is 3 revolutions:

The mandrel DO is expanded (the value 3 revolutions depends on the material and should be considered here as an example number.)

The counter Z2 signals 1710 °, that is 4.75 revolutions:

The positions Λ 1 to Λ 4 will be reduced. (The value 4.75 revolutions depends on the material and should be considered here as an example number.)

The IR detector IR 6 detects the end of the tape:

The value 52 of the counter Z2 plus V ₂ revolutions results in the standstill position of the reel DO, at which the end of the strip is just before the contact A 3. This position is stored

The coil diameter of the coil is calculated for positions Λ 1 to Λ 4 from:

a) Number of turns (value of counter Z2 divided by the resolution of the encoder),

b) Material thickness D.

The positions A 1 to A 4 are moved to the positions of the calculated half collar diameter. The reel DO is braked and brought to the stored standstill position. In this process, the increments Λ 1 to Λ 4, as well as
when winding the first turns, tracked by the pos. control and alternately to P control
switched to also the end of the tape from damage
to protect.

A dissolution of the covenant is excluded.

The federal government is to bind or to remove from the
Reel DO prepared

1 sheet of drawings

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Claims (1)

Patent claims: J. A method for controlling the pressure rollers of a tape reel, which are influenced by pressurized cylinders and which serve to insert and press the first and last tape layers onto the reel mandrel or the previously wound tape layers, the beginning of the incoming tape being detected and tracked as it rotates around the reel mandrel its respective position is used for positioning the pressure rollers, characterized in that the pressure rollers (R 1 to RA) are positioned before the beginning of the tape in such a way that the gap between the pressure roller (R I to RA) and mandrel DO is at least as thick as the material D corresponds to the fact that the passage of the beginning of the tape in the area of each pressure roller (RX to A4) is detected without contact (IRi to IR 4) and each pressure roller (Rt to R 4) is switched to pressure after the beginning of the tape has passed. . 2. The method according to claim 1, characterized in that the gap between the pressure roller (R 1 to R 4) and mandrel (DO) corresponds to the material thickness (D) plus a tolerance surcharge, the surcharge decreasing in the direction of passage of the belt. 3. The method according to claim 1 or 2, characterized in that the reel mandrel (DO) is driven with a compared to the entry speed of the tape slightly (1 to 3%) increased speed, and that the reel speed is reduced to tape speed when at least the first Pressure roller (R 1) has been switched to pressure. 4. The method according to one or more of the preceding claims, characterized in that a counter (Zi) is started from the incoming tape to detect the continuous tape length and the pressure rollers (R 1 to R 4) to the reel mandrel (DO) are set to position , as soon as the beginning of the tape is detected without contact (IRS) , that after a specified distance (ID) the start of the tape is detected again without contact (IR 6) and the tape length and distance (ID) recorded in the counter (Zi) are compared and in the event of a discrepancy between the specified distance (ID) and the measured strip length, a signal to double the distance between the pressure rollers (R 1 to R 2) around the reel mandrel (DO) is output by adjusting the pressure cylinder. 5. The method according to one or more of the preceding claims, characterized in that a shock caused by a multi-layer folding of the tape on the first pressure roller (Ri) is detected (G) and as a signal to increase the distance between the pressure rollers (R 1 to R 4) and the reel mandrel (OO) is fed to the pressure cylinders by a value increased by the material thickness (D). 6. The method according to one or more of the preceding claims, characterized in that after the beginning of the tape has passed the last pressure roller (R 4) in the direction of travel of the tape, the same is optically detected and a signal is thereby emitted to the first pressure cylinder in order to activate the first pressure roller ( R 1) by one material thickness (D) to adjust to the outside. 7. The method according to one or more of the preceding claims, characterized in that after the beginning of the tape has passed the last pressure roller (R 4) in the direction of travel, the signal generated by the beginning of the tape is used to update the counter (Zi) to the actually passed tape length and another counter (Z2 \ with which the revolutions of the reel ίο (DO) are detected, is updated to a value corresponding to the angular amount, which corresponds to the position of the beginning of the tape, the respective position of the beginning of the tape is signaled via the counter (Z 2) and the signal in the same way as the optical detection during the formation of the first tape layer is used to regulate the pressure rollers (R 1 to R 4) or the pressure force. 8. The method according to one or more of the preceding claims, characterized in that after detecting the third rotation of the reel mandrel (DO) by the counter (Z 2) of the reel mandrel (DO) is expanded and the pressure rollers (Rt to R 4) by means of Pressure cylinder are retracted. 9. The method according to one or more of the preceding claims, characterized in that the end of the strip is detected without contact (IR 6), the standstill position of the reel (DO) from the value of the counter (Z2) plus a 180 "revolution is determined and stored , as well as that the coil diameter is calculated from the number of turns and that the pressure rollers (R i to R 4) are then moved to the position of the calculated half the coil diameter and finally the reel (DO) is braked to the stored standstill position, with each pressure roller (R 1 to R 4) is switched to pressure after each passage of the tape end. 10. Device for performing the method according to the preceding claims, characterized in that optical sensors (IR 1 to IR 6) are provided for contactless detection of the beginning of the strip. 11. The device according to claim 10, characterized in that the optical sensors (IR 1 to IR 6) are infrared detectors. 12. Apparatus according to claim 10 or 11, characterized in that an optical sensor (IR i to IR 4) is arranged immediately behind each pressure roller (R i to R 4) in the direction of passage 13. The device according to one or more of claims 10 to 12, characterized in that an acceleration sensor (G) is provided for determining multiple folds of the incoming strip in the region of the first pressure roller (Ri) is.