DE2203915A1 - RING BANK REGULATION - Google Patents

Description

DR. ING. DIPL. PHYS. H. STURIES

PATENT LAWYERS "

DIPL. ING. P. EICHLER

56 WUPPERTAL 2, BRAHMSSTRASSE 29

2 Jan 7th, 1972

HACOBA-Textilmaschinen GmbH & Co KG., 56 Wuppertal-Barmen, Hatzfeider Strasse 161 - 163

"Ring Bank Regulation"

The invention relates to a method for regulating the vertical movements of a ring rail for guiding the thread Spools on textile machines, in particular ring twisting machines, depending on the number of revolutions of the delivery mechanism this machine driven reversing gear of a ring bench winch.

Ring banks of textile machines are structural units, each with several rings that open when the threads are wound up powered bobbins feed the threads to these bobbins. So that the threads are arranged in the desired manner on the bobbin, the ring rail and with it each thread-guiding ring must be able to perform vertical movements. These vertical movements are controlled with regard to their speed and with regard to the extent of their height.

In a known embodiment of the ring rail control of a ring twisting machine, the drive of the ring rail is from derived from the delivery shaft of this ring twisting machine. The delivery shaft is connected to the To couple worm shaft of a worm gear, which

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operated a ringbar winch. Depending on the direction of rotation, the one driven by one or the other electromagnetic clutch The ring rail is raised or lowered by the ring rail winch using chains, for example. The extended The worm shaft has a thread with an axially displaceable but non-rotatable driver. This driver has a switch pin depending on the rotation of the worm shaft against an upper or lower winding template or against end stops runs and this takes a short distance. The shifting of an end stop is used to switch the to effect electromagnetic clutches, so that the worm shaft and thus the ring rail winch in the opposite Direction of rotation is driven. This type of scanning is relatively complex and requires precise adjustment of the the components involved in the scanning and switching and is particularly special when the worm shaft is manually operated prone to failure if the stylus is moved beyond its end position. The well-known ring bank control is not suitable for conventional cop winding, as the ring rail speed changes during lifting or lowering is not possible.

In a known ring rail control for cop winding is worked with a hydraulic cylinder, the one Ring bank winch is operated and a control slide supplies hydraulic fluid or the latter flows back into a storage container leaves. The control spool is switched over by magnetic contacts, between which there is a ring rail winch Slidable magnet moves, which switches when approached. Of the

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The distance between the two magnetic contacts is determined by the lifting height or lowering depth of the ring rail with which the thread guides, so the rings are moved in an oscillating manner. The possible vertical movements are small compared to the length of the known sleeves or disc coils. The thread guides must constantly move from the beginning of the bobbin to the end of the bobbin during the winding process be shifted so that the thread deposit that is typical for bobbins takes place. For this purpose, the magnetic contacts are operated by a special servomotor moved from the beginning of the bobbin until the bobbin is fully wound. Adjusting the flow rate or the flow rate to or from the hydraulic cylinder takes place in each case through throttle valves, which are controlled by a special mechanical device are to be adjusted in their flow cross-section. It can be seen that this is known Ring bank regulation is very complex, accordingly prone to failure and associated with high manufacturing and maintenance costs. The arrangement of the magnetic contacts is suitable because of the small spacing of the magnetic contacts required for cop winding from each other practically not for the winding of disc bobbins or sleeves.

In relation to the known, the object of the invention is to provide a ring rail control of the type mentioned at the beginning to create that allows both disc coils or tubes of all formats to be wound, but also cop winding without any special modifications to the control device or setting changes while the ring rail drive is running. The method and the device for ring bank regulation should be simple and slight changes to the ones in question

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how to allow the lifting and lowering speed of the ring rail. This object is achieved in that an electric motor is used as the drive of the reversing gear, the speed of which is the The number of revolutions of the delivery mechanism and, if necessary, the current bobbin diameter is regulated accordingly.

For the invention it is essential that the drive of the ring rail no longer by rigid coupling with the delivery shaft or with the main drive of the delivery plant. Rather, a separate electric motor is used to drive the reversing gear, whose speed is adjustable. The regulation takes place according to the existing number of revolutions of the delivery plant, so that when the delivery speed changes, the winding spacing that has been set is retained. That way is it is possible to use disc coils and sleeves with the known device mentioned at the beginning for influencing the vertical movements of the ring rail to wrap. It is also important that the speed of the electric motor, if necessary, corresponds to the current coil diameter can be regulated accordingly, since the thread is known to be laid with rapidly changing diameters in the case of cop winding. the Ring rail speed can be adequately corrected by regulating the electric motor depending on the coil diameter will. It goes without saying that the regulation of the speed of the electric motor depending on the coil diameter also for the It is advantageous to wash disc bobbins, for example, as this results in different thread tensions during the winding process avoided and thus the stress on the threads during winding can be reduced or the winding device also for special weak threads are suitable.

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In a particularly advantageous manner, the speed of the electric motor is the direction of the respective vertical movement Ring rail adjustable accordingly. The regulation 'takes place, for example, in such a way that the upward movement of the ring rail is slower than their downward movement. This leads to the fact that the threads wound with the upward movement of the ring rail with the Downward movement of the ring rail cross wound threads, which may be necessary to strengthen the bobbin structure.

Appropriately, the regulation of the electric motor takes place in that its speed as an actual value with the speed of the Delivery mechanism compared electrically as a setpoint and the setpoint voltage, if necessary, a sawtooth-shaped voltage is superimposed. The sawtooth voltage remains switched off and the The thread is only found at a constant speed.

The slope of the sawtooth voltage or their amplitude can be adjusted as required. If the slope is changed while the amplitude remains the same, then the ratio of the lifting and lowering speed of the ring rail changed. If the amplitude is changed, there is a

the slope of the slope at the same time as the change in the same change / the speed of the ring rail.

When using a control device provided with a switching device for two electromagnetic clutches of the reversing gear for setting a desired upper or lower ring rail position, the sawtooth-shaped voltage of the Switching device triggered at the start of the lifting of the ring rail. This results in a perfect assignment between voltage

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course and ring rail movement.

Wiiü the upper and lower ring rail position of adjustable End stops intended to trigger the switching device, which is moved between the end stops by the reversing gear, in a further embodiment of the invention, the lower end stop becomes the one ending before the upper end stop is reached Stroke duration "controlling time relay is switched on and then the lower switching point is shifted in the direction of the upper one. This achieves the upward movement required for the cop winding, which is superimposed on the oscillating ring rail movement until the bobbin is filled. Moving the lower switching point in the direction of the upper ensures that the The lifting movement of the ring rail when oscillating always starts a little further up.

When the switching device reaches the upper end stop, it becomes the main drive of the delivery mechanism switched off, the switching device locked, the electromagnetic The clutches of the reversing gear are switched off and a ring rail lowering motor is switched on. Lowering the ring rail brings this in the case of cop winding operation from above beyond our starting position into a position that overcomes the bobbin base enables. When the ring rail is lowered, the entire winding is overcome at the same time. The final position reached corresponds to eggs Twisted position at the beginning of the wrapping of an empty foul. At the start of the bobbin, the timing relay is switched on first The switching device and the electromagnetic clutches remain switched off according to a twisting time.

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A known winding template is used as the lower end stop used in the form of a pot curve, each after the start of the stroke rotated by a certain amount and finally rotated into its starting position after the upper stop is achieved by the switching device. The pot curve makes it possible at. Cop winding in a simple way to move the lower switching point in the direction of the upper.

The switching device advantageously works with contactless scanning in order to reset the winding template not having to synchronize with the lowering of the ring rail or the switching device after reaching the upper end stop.

A stepper motor is used to turn the adjustable end stops to trigger the switching device. that of one through the switching device? pulse generator to be triggered is to be dined. Up to now, the end-to-end saws were set by a step-by-step mechanism with a ratchet lock is working. Due to the required dimensions and tolerances, this mechanical transmission cannot be designed in such a way that that even small rotations can be adjusted very precisely. The stepper motor makes this possible without further ado.

The pulse generator is activated with a delay in order to avoid incorrect switching caused by the rotating winding template.

The end stops are rotated in their starting position in the step adjustment direction of rotation. The stepper motor can do this be used. The reset motor required for the known stepping mechanism is saved.

A device for carrying out the method is characterized in that the reversing gear on the input side with

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a thyristor-controlled electric motor is mechanically coupled, the thyristor amplifier of the actual value voltage of a Electric motor tachometer generator and the setpoint voltage of a setpoint amplifier is applied. The setpoint amplifier is electrically connected to a tachometer of the delivery system for generating a basic equalization voltage and has a sawtooth generator for generating the sawtooth-shaped voltage to be superimposed on the basic DC voltage on. The sawtooth generator is electrically connected to a control amplifier that triggers it via the timing relay the switching device that detects the upper and / or lower ring rail position is acted upon, and the two electromagnetic ones Able to reverse the clutches of the reversing gear. The control amplifier is via a delay relay with a Pulse generator for a stepper motor of the end stops electrically connected. The pulse generator consists of a gate circuit, which, after being controlled by the control amplifier, has a square-wave generator with a stepper motor and an electronic preset counter connects, which is able to block the gate circuit after a predetermined number of pulses has elapsed. The control amplifier is equipped with an end relay to switch off the main drive of the delivery system, to switch on the lowering motor of the ring rail, to block the switching device, to switch off the electromagnetic clutches of the reversing gear and electrically connected to trigger the setting of the starting position of the end stops by the stepper motor. The control amplifier has an actuator for setting the timing relay.

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The invention is illustrated in the drawing. The figures show: FIG. 1, the one which interacts with the ring rail drive

Device for the ring bank regulation, FIG. 2 a block diagram of the ring bank regulation ^ ' FIG. 3 a schematically represented control device

for cop winding,

4 shows a coil with a cop winding and FIG. 5 shows the course of movement of the ring rail during a

Winding process, namely the ring rail height as a function of time.

The reversing gear 1-0 shown in FIG. 1 is driven by the controllable electric motor 50, which is driven by its Motor shaft 51 acts on the change gears 12, 13 and thus the continuous drive shaft 14. With the drive shaft 14 can the bevel gear 17 or the bevel gear 18 can be coupled by engaging the electromagnetic clutch 15 or 16. The bevel gears 17, 18 are in constant engagement with the driven ring gear 19. The bevel gear 17 with the drive shaft 14 is coupled, the output shaft 20 of the ring gear 19 rotates in one direction and becomes the ring gear 18 coupled to the drive shaft 14, the worm shaft rotates in the opposite direction. Accordingly the worm wheel 21 of the worm gear 23 is rotated by the worm 22 in one or the other direction and raises or lowers the ring rail (not shown) over chains 24 that are wound up or unwound.

The electromagnetic clutches 15, 16 are switched on or over by the control amplifier 52 in conjunction with

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the control device 26. The latter has one with the output shaft 20 connected threaded spindle 27. Corresponding to the rotation of the threaded spindle, the Mitidimer mounted on it 28 displaced in the directions of the double arrow 29, since it is axially displaceable, but at the same time by the guide rod 30 is rotatably mounted.

The driver 28 carries a switch 33 and a further switching element 34, which with the control amplifier 52 electrically are connected. Switch 33 and switching element 34 act with the End stops 36, 35 together, which on an axis 37 corresponding to a desired upper or lower ring rail position are adjustable. Corresponding to the distance between the two indan stops 35, 36 indicated by the line 38, the switches Switch 33 via the control amplifier 52, the electromagnetic clutches 15, 16, so that the ring rail according to each existing distance between the end stops is raised or lowered more or less.

The end stops 35, 36 are designed in Fig. 1 as winding templates in the shape of a pot curve. By rotating with axis 37 the coil shape is determined. If a sleeve is used to wind up a thread and the end stops shown are used rotated a maximum of 360 ° in the direction of the arrow while winding, the result is a biconically wound coil with winding layers arranged parallel to the sleeve axis. By changing the The direction of rotation or the shape of the end stops can be changed in the coil structure and shape. It is e.g. possible to have the same To use plates as end stops and to wind disc bobbins with them. Here is a rotation of the axis 37

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not mandatory. The axis 37 is rotated by the stepping motor 53 in conjunction with the gear 54.

Proximity switches or light barriers are used as switch 33 or as switching element 34. A proximity switch has a metal flag, here the pot cam disks the end stops 35, 36 variable internal resistance, the change of which is applied to the control amplifier 52. Also other signaling devices that have a contactless Scanning the position of the end stops or the determination of the distance between the two can be used. Switch 33 and switching element 34 interact so that switch 33 causes the clutches 15, 16 to switch and switching element 34 enables the upper limit stop to be recognized, to avoid switching errors. The contactless scanning facilitates the operation of the control device 26, since Movement e.g. when lowering the ring rail from the upper end of the winding to the starting position does not affect the switching device 33, 34 needs to be voted on. It goes without saying, however, that scanning with touch or in accordance with the above called ring rail control with switching pin is possible.

The lowering of the ring rail after completion of a winding is carried out by the ring rail lowering motor 55, which drives the threaded spindle 27 or the output shaft 20 rotates so that the switching device 33, 34 after winding of disc coils or Sleeves before the end stop 35 or after cop winding is lowered beyond the end stop 35.

Fig. 1 is adjacent to the electric motor 50 with the

Speedometer 56 connected to the delivery shaft 57 of the delivery mechanism

58, which together with the TachogeneratoiTÜes electrical

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motor 50 determines the basic regulation of the electric motor which influences the winding spacing.

In Fig. 2, the control elements of the ring rail drive are shown in an operational context. The electric motor 50 drives the tachogenerata / its voltage to the actual speed value of the electric motor. The actual value voltage is fed to the thyristor amplifier 59, that of the setpoint amplifier 60 receives the setpoint voltage and, by comparing the two voltages, determines the manipulated variable which the electric motor 50 is fed. The setpoint amplifier 60 receives from the tachometer 56 a basic DC voltage 74 corresponding to the number of revolutions of the Delivery factory. This basic DC voltage can be set with the symbolized variable resistor P3. This results in a stepless adjustment of the winding distance while the machine is running. With the control device described so far, the electric motor 50 can basically be used for winding can be used by disc coils and sleeves.

In order to be able to change the ring rail speed when lifting and lowering, the setpoint amplifier has a sawtooth generator, which superimposes a sawtooth-shaped voltage on the basic DC voltage. In the setpoint amplifier 60 is a sawtooth 61 superimposed on the DC voltage 74 is shown. The rise in the characteristic causes an increase in the ring rail speed and the drop in the characteristic curve is its decrease. This means that the speed of the electric motor is dependent on the Regulated coil diameter, which is the case with cop winding because of the constantly smaller or larger current coil diameter must be done continuously. The saw tooth 61 has a longer linearly rising edge and a shorter linearly falling edge

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Accordingly, the change takes place in different times, i.e. the lifting movement is slower than the lowering movement. The turns wound during the lifting movement thus cross one another with those of the ones wound during the lowering movement. The controllers P1, P2 are used to set the saw tooth. P1 determines the rising edge or amplitude of the sawtooth and P2 the falling edge. Both settings are stepless and with running Machine possible. The sawtooth generator is switched off to wind disc coils or sleeves.

The setpoint amplifier 60 can be set up so that, for example, disc coils with different ring rail speeds can be wound. To do this, it is necessary to add a square-wave voltage to the basic DC voltage in sections to be superimposed so that the motor runs faster or slower.

The beginning of the sawtooth-shaped voltage is in each case determined by the control amplifier 52. In the case of a cop winding, the switch 33 becomes the switching device for the control amplifier Approach the lower end stop and determine the lower ring rail position by switching the control amplifier. Simultaneously the timing relay D4 of the control amplifier is switched on.

To the control device 26 shown in FIG. 1 for To use cop winding, on the one hand, the timing relay of the control amplifier and, on the other hand, the end stop 3> 'as Unit curve used to determine the lower reversal point of the ring rail. Fig. 3 shows the end stop 35 ', which as Pot curve is formed, which extends from a lower starting point of reversal 62 up to the vicinity of the upper end stop 36 ' winds. It controls the switch 33 of the switching device. Of the

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smallest distance h between 35 'and 36' corresponds to that in Fig. 5 shown ring rail stroke h. The timing relay remains switched on until this stroke has passed through h is. Then the respective upper ring rail position is reached and the electromagnetic clutches 15, 16 of the reversing gear are switched over by the control amplifier 52. The timing relay D4 is also infinitely adjustable and can be switched on while the Electric motor 50 can be adjusted. The up and down of the ring rail with constant shifting of the lower switching point in the direction of the upper one takes place until the switching command of the time relay D4 coincides with that of the switching device 33, 34. In this Momentarily an end relay 63 is activated, which switches off the main drive of the delivery mechanism via the control line 64 and the ring rail lowering motor 2? turns on. The end relay continues to block the Umschaltvorricxiv-ir '33, 34 and makes the electromagnetic clutches 15,16 of the Wenae ^ drive currentless. This is necessary because otherwise the downward movement of the ring rail, especially above the lower output switchover point 62 would be blocked by the electromagnetic clutches in the start-up position.

In the winding-up position, twisting should be carried out without moving the ring rail. The time relay is switched on and the switching device 33, 34 and the electromagnetic clutches of the reversing gear remain in accordance with that of the actuator P5 set twisting time de-energized.

In Fig. 4 a cop winding is shown. On the sleeve 66 the thread is through the oscillating and thereby slowly upward sliding ring rail wound, so that the typical coating 67 for cop winding results. After wrapping

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the sleeve 66 is wound around when the ring rail is lowered according to FIG. 65, that is to say with a large spacing of turns. At 68, the start turns at the start of winding and the end turns at the end of the bobbin upset. The amount of these winding turns to be wound onto the base of the spool depends on the run-out conditions the machine.

In FIG. 5, the course of the ring rail movement is plotted as stroke height H over time T. You can see that the Ring rail with the stroke h oscillating from the lower initial reversal point 62 to the upper end stop 36 'and thereby the threads in oblique stratification according to FIG. 4 ablsgt.

To move the lower switching point towards the upper one in the case of cop winding, the end stop 35 * must be turned. When wrapping sleeves, the end stops 35, 36 must be rotated after each ring rail stroke. The stepping motor 53 used for rotation is controlled by a pulse generator which essentially consists of a gate circuit 69 which is controlled by the control amplifier 52 via a delay relay 70. If the gate circuit is permeable, the square-wave generator 71 to be connected to an alternating current network supplies, for example, 100 Hz pulses for the amplifier 72 of the stepper motor 53. At the same time, the electronic preset counter 37 is activated, which blocks the gate circuit 69 after a preset number of pulses has expired. If one selects a pot ^{curve 35 'extending over 360 0} and accordingly 960 pulses for a full revolution, a rotation of 0.375 ° can be achieved with one pulse, so the pot curve can be set very precisely.

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After the winding process has ended, the end relay switches 33 on the stepping motor via the gate circuit 69 until the end stop 35 'in the case of cop winding or both end stops 35, 36 reaches its starting position in the step adjustment direction of rotation to have.

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Claims (1)

Patent claims: (T.! Method for regulating the vertical movements of a ring rail for Thread guidance when winding on textile machines, especially ring twisting machines, with a reversing gear driven depending on the number of revolutions of the delivery mechanism of this machine 4 »' Ring bench winch, characterized in that that an electric motor (50) is used to drive the reversing gear (17,18,19), the speed of which corresponds to the number of revolutions of the delivery mechanism and, if necessary, is regulated according to the current bobbin diameter. 2. The method according to claim 1, characterized in that that the speed of the electric motor (50) is regulated according to the direction of the respective vertical movement of the ring rail will. ο Method according to claim 1, characterized in that that the speed of the electric motor (50) is electrically compared as an actual value with the speed of the delivery mechanism as a setpoint value and the setpoint voltage, if necessary, a sawtooth shape Voltage is superimposed. 4. The method according to claims 2 or 3 »characterized in that the edge steepness of the sawtooth-shaped Voltage or its amplitude is adjusted as required. 5. The method according to claim 3 »in which a desired upper or lower ring rail position from one provided with a switching device Control device for two electromagnetic clutches 309831/0753 of the reversing gear is adjustable, characterized in that the sawtooth-shaped voltage of the Umsehaltvorriehtung (33,34) each at the start of the lifting of the ring rail is triggered. 6. The method of claim 5, wherein the upper and lower Hingbank ply of adjustable end stops for triggering the Umsehaltvorriehtung is determined, which is moved by the reversing gear between the end stops, characterized in that that from the lower end stop (35 ') a time relay which controls the stroke duration which ends before the upper end stop (36') is reached switched on and then the lower switching point is shifted in the direction of the upper one. 7. The method according to claim 6, characterized ^ ^-5 characterizes η et that when the upper end stop (36 *) is reached by the switching device (33,34), the main drive of the delivery mechanism is switched off, the Umsehaltvorriehtung (33,34) blocked, the electromagnetic Clutches (15, 16) of the reversing gear (17, 18, 19) are switched off and a ring rail lowering motor (55) is switched on. 8. The method according to claims 6 and 7, characterized that as the lower end stop (35 ') a known winding template in pot curve shape is used, the each after the start of the stroke is rotated by a certain amount and finally rotated into its starting position, after which the upper one End stop (36 ·) is reached by the Umsehaltvorriehtung (33,34). 309831/0753 9. The method according to claim 5 or 8, characterized in that that the switching device (33, 34) works with contactless scanning. 10. The method in particular according to claim 6, characterized in that a stepper motor (53) is used for rotating the adjustable end stops 65, 35 ', 56, 36') to trigger the switching device (33, 34), which is driven by a the switch 7- ^ direction to be triggered pulse generator (63, 71, 75) is to be fed , 11. The method according to claim 10, characterized in that the pulse generator <& 9, 71 _s 73) is activated with a delay. 12. The method according to claim 10, characterized in that that the end stops (35, 55 ', 36, 36') rotated in the step adjustment direction of rotation in its starting position will. 13. The method according to claims 5 and 6, characterized in that that at the beginning of the winding the timing relay (L> <i) is switched on and the switching device 63, 54) and aie electromagnetic clutches (15, 16) of the reversing gear remain switched off according to a twisting time. 309.831 / 0753 1 <l ·. Device for carrying out the method according to claim 1, characterized in that the reversing gear (17, 10, 19) is mechanically coupled on the input side to a thyristor-controlled electric motor £> 0), the thyristor amplifier (59) of which is powered by the actual value voltage of an electric motor tachometer generator ( 5 ο) and ü.ex * setpoint voltage of a setpoint amplifier (G (J) is applied. 15 · Method according to claims 3 and 14, since the c h y e denotes the setpoint amplifier (60) with a speedometer (56) from the supplier is electrically connected for generating a basic DC voltage (74) and a sawtooth generator for generating which has the basic DC voltage to be superimposed in a sawtooth shape. 1 <?. Method according to claims 5, 6, 13 and 15 »α a durrch characterized in that the sawtooth generator is electrically connected to a control amplifier (52) that triggers it via the timing relay (D4), which is acted upon by the switching device (33, 3s) detecting the upper and / or lower ring rail position and capable of reversing the two electromagnetic clutches (15, 16). 309831/0753 17. The method according to claim 16, which characterizes a d u r c ti g, that the control amplifier (52) via a delay relay (70) with a Pulse generator (69, 71, 73) for a stepper motor (53) uer end stops (35, 35 ', 36, 56') are electrically connected is. · -. 16. The method according to claim 17, characterized in that that the pulse generator (69, 71 »73) consists of a gate circuit (69), which after activation through the control amplifier (52) a square wave generator (71) with the stepping motor (53) and an electronic Preselection counter (73) connects, and which is able to block the gate circuit after a predetermined number of pulses has elapsed. iy. Method according to claim 16, characterized in that that the control amplifier with a final relay (63) to switch off the main drive of the delivery plant, for switching on the ring rail lowering motor (55), to block the switching device (33, 54) for disconnection outer electromagnetic clutches (15, 16) of the reversing gear (17, 1ö, 19) and to trigger the setting of the starting position (62) of the end stops (35,35 ') u is electrically connected by the stepping motor (53). 309831/0753 20. The method according to claim 16, characterized by a d u r c ti, that the control amplifier (52) has an actuator (P5) for setting the timing relay (.D4) having. 309831/0753