EP3031968A1 - Method for controlling a needle machine - Google Patents
Method for controlling a needle machine Download PDFInfo
- Publication number
- EP3031968A1 EP3031968A1 EP15002896.7A EP15002896A EP3031968A1 EP 3031968 A1 EP3031968 A1 EP 3031968A1 EP 15002896 A EP15002896 A EP 15002896A EP 3031968 A1 EP3031968 A1 EP 3031968A1
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- European Patent Office
- Prior art keywords
- take
- speed
- needle
- unit
- nonwoven fabric
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 55
- 239000000835 fiber Substances 0.000 claims abstract description 31
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000007654 immersion Methods 0.000 claims description 26
- 230000008859 change Effects 0.000 claims description 11
- 238000007598 dipping method Methods 0.000 claims description 11
- 230000004044 response Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H18/00—Needling machines
- D04H18/02—Needling machines with needles
Definitions
- the invention relates to a method for controlling a needle machine, which has a needle unit with a plurality of needles for needle processing of a nonwoven fabric, wherein the needle unit performs a lifting movement over the nonwoven fabric, so that the needles oscillate retracting into and out of the nonwoven fabric the needling machine has at least one take-off roll, which is downstream of the needle unit in relation to a transport movement of the fiber fleece and initiates a withdrawal force into the fiber fleece, for which purpose a drive unit for rotating drive of the take-off roll is provided and which is controlled by means of a control unit.
- the invention further relates to a needle machine for carrying out the method and to a control unit for such a needle machine.
- the DE 696 03 706 T2 describes a generic method for controlling a needle machine, and it is proposed to provide the withdrawal speed of the transport movement of the fibrous web via two take-off rolls so that it is synchronized with the periodic lifting movement of the needle unit over the fiber web.
- the speed of the take-off rolls is reduced and moves the needle unit with the needles from the fiber fleece back out, so the speed of the take-off rolls is increased.
- the change in the speed of the take-off rollers should be synchronous with the stroke position of the needle unit. The minimum of the speed of the take-off rolls can thereby advance or lag the position of the needle unit at bottom dead center.
- the change of Speed is achieved by the most over a crank drive given lifting movement of the needle unit according to a sine function, which is stated that the change in speed with a modulation may have a variable amplitude up to a receipt of an angular acceleration with the value zero.
- the object of the invention is the development of a method for controlling a needle machine, the provision of a needle machine and a control unit for this purpose, wherein the method is to cause the lowest possible mechanical stresses in the nonwoven fabric and wherein under minimal mechanical stress on the needle machine, the transport speed of the nonwoven fabric increases and / or a predetermined average value can be maintained.
- the method according to the invention provides at least the following steps: Determining a limit torque for driving the take-off roll and driving the drive unit by the control unit with a drive torque for driving the take-off roll, which does not exceed the limit torque, so that a torque limit is formed.
- the core of the invention is first the determination of a limit torque, which is determined and specified for driving the at least one take-off roll. This ensures that the mechanical stresses in the nonwoven fabric do not exceed a limit, since the limitation of the torque to drive the take-off rolls leads to a limitation of a pull-off force in the non-woven fabric.
- the essence of the invention in connection with the determination of the limit torque continues to drive the drive unit by the control unit with a drive torque for driving the at least one take-off roll, which does not exceed the limit torque.
- a torque limit is established, and the torque may, for example, move between the theoretical value zero and the limit torque.
- the speed of the at least one take-off roll is not necessarily maintained at a constant value, since, for example, with a low or in the absence of a retention force by the intervention of the needles in the nonwoven fabric, the speed of the take-off roll can be increased, and only Upon engagement of the needle unit in the nonwoven fabric retention forces can occur, which allow the drive torque to rise to the limit torque to drive the at least one take-off roll. Only then can the speed of the take-off roll be reduced, wherein the reduction can optionally also be made to the value zero. Only when the needle unit releases the nonwoven fabric again, the take-off roll can accelerate freely, so engages the limit torque at least over the immersion period during which the needles are retracted into the nonwoven fabric.
- the take-off rolls may have, by the torque limitation over the immersion period, a speed which induces a tension in the nonwoven fabric which, at least over the period of immersion, may be kept substantially less than or precisely at the corresponding limit torque at a constant value.
- a stroke sensor provided, wherein by the stroke sensor, a dipping period is detected, over which the needles retract into the nonwoven fabric and by the stroke sensor is detected a freewheeling period during which the needles are moved out of the nonwoven fabric, wherein a sensor signal is output to the control unit and wherein the control unit the drive torque for driving the take-off roller in response to the control signal controls.
- the driving of the drive unit with the torque limitation is limited to the immersion period.
- the stroke sensor supplies the sensor signal to the control unit, whereby the control unit has the information as to whether the needles engage in the nonwoven fabric or not.
- the sensor can for example also be replaced by a rotary encoder, which cooperates with a drive motor in the lifting mechanism and over which the stroke position of the needle unit can be detected accurately enough.
- the presently described sensor can thus be arranged at any suitable position to determine the stroke position directly or indirectly, and for example, the sensor signal can also be derived from an electronic control signal for controlling the lifting drive, so that in the broadest sense of the present invention also the stroke sensor can form.
- the torque limiter for driving the drive unit may be limited to the immersion period. Over the freewheeling period, the torque of the drive unit need not necessarily be limited, since the needles do not interfere with the nonwoven fabric and thus can not cause a retention force in the nonwoven fabric. With particular advantage, the driving of the drive unit can take place in the freewheeling period at a predetermined rotational speed for the take-off roll, as explained in more detail below.
- the predetermination of the speed of the take-off roll in the freewheeling period can be made with particular advantage depending on a determined in the immersion period speed profile of the take-off roll. For example, if the speed profile in the dipping period on a total low speed level, for example, because the retention force by the needles in the fiber fleece fails high and thus engages the torque limiter early, so in the freewheeling period, the speed of the take-off roll can be predetermined so that the very low speed of Take-off roller is caught up in the dipping period.
- the lag of the fiber fleece in its transport movement can be made up by an increase in the rotational speed over the freewheeling period, ie if no needles engage in the fiber fleece.
- an average transport speed of the nonwoven fabric in the transport movement can be predetermined, and the predetermination of the speed for the take-off roll over the freewheeling period can additionally be carried out by the predetermined average transport speed of the nonwoven fabric at least over one and preferably over several Stroke cycles consisting of the immersion period and the freewheeling period is maintained.
- the average transport speed is particularly important when the needle machine is operated in the composite of several processing machines for pre and post-processing of the fiber web.
- the needle machine is usually downstream of a funnellegestation and upstream of a removal station, and thus may be part of a nonwoven system.
- the composite of the needle machine between upstream and downstream stations results in a predetermined average of the total material flow velocity of the nonwoven material Transport speed, which must be maintained for a trouble-free operation in order not to negatively influence the upstream and downstream processes.
- the average transport speed can also change over the processing time, so that the method receives the average transport speed via the control module as at least one further reference variable.
- the predetermination of the rotational speed for the take-off roll over the freewheeling period can additionally be carried out in that the predetermined average transport speed of the fiber web is maintained at least over one and preferably over a plurality of lifting cycles.
- the method may be operated by the construction of a control loop via the control unit, and the control unit may comprise a drive module and a control module for forming the control loop, wherein the control loop can be operated with: a reference variable, formed by the predetermined average transport speed, a controlled variable, formed by a control signal, which is output to the drive module and a disturbance derived from the speed profile of the take-off rolls over the immersion period.
- a control deviation can be determined by the control unit and the control signal can be output so that a change in the speed of the take-off rolls in the dipping period causes this adjustment compensating adjustment of the speed of the take-off rolls in the freewheeling period.
- the drive unit may have at least one motor and a rotary encoder, wherein the rotary encoder detects the rotational speed of the motor and outputs a feedback signal to the control unit and in particular to the control module.
- the invention further relates to a needle machine for needle processing of a nonwoven fabric with a needle unit having a plurality of needles, wherein the needle unit is designed to perform a lifting movement over the nonwoven fabric, so that the needles are retractable retractable into the nonwoven fabric and out of this again, and with at least one take-off roller, which is arranged downstream with respect to a transport movement of the non-woven fabric of the needle unit and serves to initiate a withdrawal force into the non-woven fabric, for which a drive unit for rotating drive of the take-off roll is provided and which can be controlled by means of a control unit, wherein the needle machine is formed is to carry out the prescribed procedure.
- control unit for a needle machine as described above, in order to carry out the method according to the invention.
- the control unit may comprise at least: a drive module and a control module for forming a control loop, wherein the control loop is operable by a reference variable, formed by the predetermined average transport speed, a controlled variable, formed by a control signal, which is output to the drive module and a Disturbance, derived from the speed profile of the take-off rolls over the immersion period, so that a control deviation can be determined by the control unit and the control signal can be output so that a change in the speed of the take-off rolls in the dipping period a change compensating this adjustment of the speed of the take-off rolls in the freewheeling period is effected ,
- FIG. 1 shows a schematic view of a needle machine 1 for carrying out the method according to the invention.
- the needling machine 1 serves to solidify a fiber web 100, which is moved through the needle machine 1 with a transport movement x, represented by an arrow.
- the movement in the non-woven fabric 100 is generated by two opposing draw-off rollers 12, wherein by way of example a take-off roller 12 is driven by a motor 19.
- Upstream of the take-off rolls 12 is a needle unit 10 having a plurality of needles 11, and the needle unit 10 can be moved up and down with a lifting mechanism 22 in a vertical direction with respect to the plane of extent of the non-woven fabric 100.
- the up and down movement takes place over successive lifting cycles, which are subdivided into an immersion period te, in which the needles 11 into the non-woven fabric 100 immersed, characterized by a penetration depth se, and in a freewheeling period te, in which the needles 11 are out of engagement with the nonwoven 100, see enlargement of a corresponding sensor signal 16, which is output by a stroke sensor 15 for detecting the lifting movement.
- a stitch plate 21 is shown, over which the fiber fleece 100 is moved away and allows the passage.
- the control unit 14 comprises a drive module 17 and a control module 18, wherein the drive module 17 primarily serves to control the speed and in particular a torque of the motor 19, for which the motor 19 is coupled to a rotary encoder 20.
- the rotary encoder 20 transmits a feedback signal Rk to the drive module 17.
- the feedback signal Rk can be continued by the drive module 17 to the control module 18, wherein the control module 18 to the drive module 17 outputs a correspondingly determined control signal R.
- the stroke sensor 15 for detecting the stroke position of the needle unit 10 outputs the sensor signal 16 to the control module 18, and the sensor signal 16 provides the control module 18 with the information as to whether the needle unit 10 is in the dipping period te or in the freewheeling period tf.
- a mean transport speed vt_m As a reference variable for the control of the needle machine 1 is a mean transport speed vt_m, which is output as a signal to the control module 18.
- the mean transport speed vt_m results from an integration of the needle machine 1 in the composite of a nonwoven system, and the average transport speed vt_m must be maintained as accurately as possible for trouble-free operation of the nonwoven system.
- the control module 18 taking into account the sensor signal 16 from the stroke sensor 15 from a control variable to the drive module 17, which is formed by a control signal R.
- the difference between a speed value of the feedback signal Rk and the control signal R results in a disturbance, which is derived from the Speed profile of the take-off rolls 12 over the immersion period te.
- the motor 19 and thus the take-off roller 12 is torque-controlled, such that the torque does not exceed a predetermined limit torque.
- This damage to the needles 11 is avoided because the withdrawal force in the fiber web 100 is limited by a limited torque in the take-off rolls 12.
- the torque limitation is provided only over the immersion period te, since only then damage to the needles 11 can be caused. If the needle unit 10 is located above the freewheeling period tf, predetermined by the sensor signal 16 of the stroke sensor 15 to the control module 18, the rotational speed over the freewheeling period tf can be adjusted in such a way that the deviation from the feedback signal Rk is dependent on the magnitude of the control signal R mean transport speed vt_m for the fiber web 100 results.
- the limit torque flow u.a. the values fleece weight, fleece width, transport speed, speed delay between inlet and outlet of the needle machine, the drive power and the torque of the motor without material.
- FIGS. 2 and 3 show different compensation curves K1 and K2 a speed curve D of the take-off rolls 12, from which directly a transport speed v (x) can be derived.
- the mean velocity value of the transport speed v (x) of the Transporting movement x over time t can be divided into the dipping period te and the free running period tf, where both periods together represent the lifting cycle T of the movement in the needle unit 10.
- the speed of the nonwoven 100 may have a constant minimum value, which may also be zero. If the needles 11 are again disengaged from the fiber web 100 and start the freewheeling period tf, then a compensation course K1 can be set therein, which sets a speed of the fiber web 100 by a corresponding speed in the draw-off roller 12 such that the average speed of the fiber web 100 corresponds to the predetermined mean transport speed vt_m.
- the speed course D of the transport speed v (x) of the nonwoven fabric 100 according to FIG. 2 shows over the immersion period te compared to the velocity course D of FIG. 3 a greater value.
- the retention force by the needles 11 in operative connection with the non-woven fabric 100 may be less than that shown in the speed curve D shown in FIG. 3 , because the velocity profile D of the transport velocity v (x) in FIG. 3 has lower values over the immersion period.
- the control signal R can be output to the drive module 17 via the control loop with the control module 18 taking into account a compensation curve K1, K2. Due to the lower reduction of the transport speed v (x) in the velocity course D according to the example in FIG. 2 falls the compensation curve K1 in FIG. 2 less than the compensation curve K2 in the example of FIG. 3 ,
- the control loop regulates the speed over the freewheeling period tf taking into account the reference variable, formed by the required mean transport speed vt_m, such that the mean transport speed vt_m is established while forming the compensation curves K1 and K2.
- the higher or lower velocity profile D of the fiber web 100 may be dependent, for example, on the precompression of the fiber web 100, the thickness of the needles 11 or the depth of penetration of the needles 11, wherein the transport speed v (x) over the immersion period te occurs via a torque limitation. If the take-off rolls 12 reach a limit torque, the control unit 14 lowers the speed of the take-off roll 12 such that the limit torque is not exceeded.
- the compensation curve K1 or K2 can be adjusted by the control loop 18 in the control module 18 so that Finally, the average transport speed vt_m sets.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Die Erfindung betrifft ein Verfahren zur Steuerung einer Nadelmaschine (1), die zur Nadelbearbeitung eines Faservlies (100) eine Nadeleinheit (10) mit einer Vielzahl von Nadeln (11) aufweist, wobei die Nadeleinheit (10) eine Hubbewegung über dem Faservlies (100) ausführt, sodass die Nadeln (11) oszillierend in das Faservlies (100) einfahren und aus diesem wieder herausfahren, und wobei die Nadelmaschine (1) wenigstens eine Abzugswalze (12) aufweist, die in Bezug auf eine Transportbewegung (x) des Faservlies (100) der Nadeleinheit (10) nachgelagert ist und eine Abzugskraft in das Faservlies (100) einleitet, wofür eine Antriebseinheit (13) zum rotierenden Antrieb der Abzugswalze (12) vorgesehen ist und die mittels einer Steuereinheit (14) angesteuert wird. Erfindungsgemäß weist das das Verfahren wenigstens die folgenden Schritte auf: - Bestimmung eines Grenzdrehmomentes zum Antrieb der wenigstens einen Abzugswalze (12); - Ansteuern der Antriebseinheit (13) durch die Steuereinheit (14) mit einem Antriebsdrehmoment zum Antrieb der wenigstens einen Abzugswalze (12), das das Grenzdrehmoment nicht überschreitet, sodass eine Drehmomentbegrenzung gebildet wird.The invention relates to a method for controlling a needle machine (1), which has a needle unit (10) with a multiplicity of needles (11) for needle processing of a fiber fleece (100), wherein the needle unit (10) moves in a stroke over the fiber fleece (100). so that the needles (11) oscillate into and out of the nonwoven fabric (100), and wherein the needle machine (1) has at least one take-off roll (12) which, in relation to a transport movement (x) of the nonwoven fabric (100 ) of the needle unit (10) and initiates a withdrawal force into the fiber fleece (100), for which a drive unit (13) for rotating drive of the take-off roll (12) is provided and which is controlled by means of a control unit (14). According to the invention, the method comprises at least the following steps: - Determining a limit torque for driving the at least one take-off roll (12); - Driving the drive unit (13) by the control unit (14) with a drive torque for driving the at least one take-off roll (12) which does not exceed the limit torque, so that a torque limit is formed.
Description
Die Erfindung betrifft ein Verfahren zur Steuerung einer Nadelmaschine, die zur Nadelbearbeitung eines Faservlieses eine Nadeleinheit mit einer Vielzahl von Nadeln aufweist, wobei die Nadeleinheit eine Hubbewegung über dem Faservlies ausführt, sodass die Nadeln oszillierend in das Faservlies einfahren und aus diesem wieder herausfahren, und wobei die Nadelmaschine wenigstens eine Abzugswalze aufweist, die in Bezug auf eine Transportbewegung des Faservlieses der Nadeleinheit nachgelagert ist und eine Abzugskraft in das Faservlies einleitet, wofür eine Antriebseinheit zum rotierenden Antrieb der Abzugswalze vorgesehen ist und die mittels einer Steuereinheit angesteuert wird. Die Erfindung bezieht sich weiterhin auf eine Nadelmaschine zur Ausführung des Verfahrens und auf eine Steuereinheit für eine solche Nadelmaschine.The invention relates to a method for controlling a needle machine, which has a needle unit with a plurality of needles for needle processing of a nonwoven fabric, wherein the needle unit performs a lifting movement over the nonwoven fabric, so that the needles oscillate retracting into and out of the nonwoven fabric the needling machine has at least one take-off roll, which is downstream of the needle unit in relation to a transport movement of the fiber fleece and initiates a withdrawal force into the fiber fleece, for which purpose a drive unit for rotating drive of the take-off roll is provided and which is controlled by means of a control unit. The invention further relates to a needle machine for carrying out the method and to a control unit for such a needle machine.
Die
Mit dieser Modulation der Drehzahl der Abzugswalzen soll ermöglicht werden, eine Verlangsamung der Transportbewegung im Faservlies während der Eintauchperiode der Nadeln in das Faservlies zu erreichen, wobei die Verlangsamung sich nicht auf einen bloßen Stillstand des Faservlieses beschränken soll. Im Ergebnis soll die erreichbare mittlere Transportgeschwindigkeit des Faservlieses durch die Nadelmaschine erhöht werden können.With this modulation of the speed of the take-off rolls should be made possible to achieve a slowing of the transport movement in the nonwoven fabric during the immersion period of the needles in the nonwoven fabric, the slowdown should not be limited to a mere standstill of the nonwoven fabric. As a result, the achievable average transport speed of the fiber web should be increased by the needle machine.
Nachteilhafterweise können sich im Faservlies erhebliche Spannungen aufbauen, wenn die Transportgeschwindigkeit des Faservlieses durch die zugeordnete Drehzahl der Abzugswalzen nicht hinreichend reduziert wird, insbesondere wenn eine Sollwertvorgabe bezüglich der Abzugsgeschwindigkeit vorgesehen ist. Sobald die Nadeln in das Faservlies eintauchen, muss, eine begrenzte Nachgiebigkeit des Faservlieses vorausgesetzt, die Drehzahl über der gesamten Eintauchperiode nahezu den Wert Null aufweisen. Aufgrund von Elastizitäten, Dehnungswerten und einem möglichen Schlupf im Abzugsverhalten des Faservlieses kann jedoch bei einer richtigen Parametrierung der Abzugsgeschwindigkeit eine Überhöhung von auftretenden Spannungen im Faservlies vermieden werden, um eine Beschädigung der Nadeleinheit und insbesondere um ein Brechen der Nadeln zu vermeiden. Untersuchungen haben gezeigt, dass bei einer unmittelbaren Synchronisation der Geschwindigkeit der Transportbewegung des Faservlies mit der Hubbewegung der Nadeleinheit weiterhin erhebliche Spannungen im Material auftreten können und eine Anhebung der mittleren Transportgeschwindigkeit kann nur unter Berücksichtigung weiterer Optimierungen im Betrieb der Nadelmaschine um ein lediglich begrenztes Maß erreicht werden.Disadvantageously, considerable stresses can build up in the nonwoven fabric if the transport speed of the nonwoven fabric is not sufficiently reduced by the associated rotational speed of the take-off rolls, in particular if a setpoint specification with regard to the take-off speed is provided. Once the needles are immersed in the nonwoven fabric, assuming limited compliance of the nonwoven fabric, the speed must be close to zero over the entire immersion period. Due to elasticities, elongation values and a possible slip in the withdrawal behavior of the nonwoven fabric, however, an excessive increase of occurring stresses in the nonwoven fabric can be avoided with a correct parameterization of the take-off speed in order to avoid damage to the needle unit and, in particular, breakage of the needles. Investigations have shown that in the case of an immediate synchronization of the speed of the transport movement of the fiber fleece with the lifting movement of the needle unit, considerable stresses can continue to occur in the material and an increase in the average transport speed can only be achieved by taking into account further optimizations in the operation of the needle machine to a limited extent.
Aufgabe der Erfindung ist die Weiterbildung eines Verfahrens zur Steuerung einer Nadelmaschine, die Bereitstellung einer Nadelmaschine und einer Steuereinheit hierzu, wobei das Verfahren möglichst geringe mechanische Spannungen im Faservlies hervorrufen soll und wobei unter möglichst geringer mechanischer Belastung der Nadelmaschine die Transportgeschwindigkeit des Faservlieses erhöht und oder auf einem vorgegebenen mittleren Wert gehalten werden kann.The object of the invention is the development of a method for controlling a needle machine, the provision of a needle machine and a control unit for this purpose, wherein the method is to cause the lowest possible mechanical stresses in the nonwoven fabric and wherein under minimal mechanical stress on the needle machine, the transport speed of the nonwoven fabric increases and / or a predetermined average value can be maintained.
Diese Aufgabe wird ausgehend von einem Verfahren zur Steuerung einer Nadelmaschine gemäß dem Oberbegriff des Anspruches 1, ausgehend von einer Nadelmaschine gemäß dem Oberbegriff des Anspruches 8 und ausgehend von einer Steuereinheit gemäß Anspruch 9 mit den jeweils kennzeichnenden Merkmalen gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.This object is achieved starting from a method for controlling a needle machine according to the preamble of claim 1, starting from a needle machine according to the preamble of claim 8 and starting from a control unit according to claim 9 with the respective characterizing features. Advantageous developments of the invention are specified in the dependent claims.
Das erfindungsgemäße Verfahren sieht dabei wenigstens die folgenden Schritte vor: Bestimmung eines Grenzdrehmomentes zum Antrieb der Abzugswalze und das Ansteuern der Antriebseinheit durch die Steuereinheit mit einem Antriebsdrehmoment zum Antrieb der Abzugswalze, das das Grenzdrehmoment nicht überschreitet, sodass eine Drehmomentbegrenzung gebildet wird.The method according to the invention provides at least the following steps: Determining a limit torque for driving the take-off roll and driving the drive unit by the control unit with a drive torque for driving the take-off roll, which does not exceed the limit torque, so that a torque limit is formed.
Kern der Erfindung ist zunächst die Bestimmung eines Grenzdrehmomentes, welches zum Antrieb der wenigstens einen Abzugswalze bestimmt und vorgegeben wird. Dadurch wird erreicht, dass die mechanischen Spannungen im Faservlies einen Grenzwert nicht übersteigen, da die Begrenzung des Drehmomentes zum Antrieb der Abzugswalzen in einer Begrenzung einer Abzugskraft im Faservlies führt. Der Kern der Erfindung betrifft in Verbindung mit der Bestimmung des Grenzdrehmomentes weiterhin ein Ansteuern der Antriebseinheit durch die Steuereinheit mit einem Antriebsdrehmoment zum Antrieb der wenigstens einen Abzugswalze, welches das Grenzdrehmoment nicht überschreitet. Somit wird eine Drehmomentbegrenzung gebildet, und das Drehmoment kann sich beispielsweise zwischen dem theoretischen Wert Null und dem Grenzdrehmoment bewegen. Durch die Drehmomentbegrenzung wird effektiv vermieden, dass Nadeln der Nadeleinheit durch eine zu große Abzugskraft des Faservlieses brechen können, wobei vorteilhafterweise die gesamte Nadelmaschine geringeren mechanischen Belastungen ausgesetzt ist.The core of the invention is first the determination of a limit torque, which is determined and specified for driving the at least one take-off roll. This ensures that the mechanical stresses in the nonwoven fabric do not exceed a limit, since the limitation of the torque to drive the take-off rolls leads to a limitation of a pull-off force in the non-woven fabric. The essence of the invention in connection with the determination of the limit torque continues to drive the drive unit by the control unit with a drive torque for driving the at least one take-off roll, which does not exceed the limit torque. Thus, a torque limit is established, and the torque may, for example, move between the theoretical value zero and the limit torque. By limiting the torque is effectively avoided that needles of the needle unit can break due to excessive withdrawal force of the nonwoven fabric, advantageously the entire needle machine is exposed to lower mechanical loads.
Durch die Bestimmung eines Grenzdrehmomentes wird die Drehzahl der wenigstens einen Abzugswalze nicht zwingend auf einem konstanten Wert gehalten, da beispielsweise bei einer nur geringen oder bei einem Fehlen einer Rückhaltekraft durch das Eingreifen der Nadeln in das Faservlies die Drehzahl der Abzugswalze erhöht werden kann, und erst bei Eingriff der Nadeleinheit in das Faservlies können Rückhaltekräfte auftreten, die das Antriebsdrehmoment bis an das Grenzdrehmoment zum Antrieb der wenigstens einen Abzugswalze steigen lassen. Erst dann kann die Drehzahl der Abzugswalze reduziert werden, wobei die Reduktion gegebenenfalls auch auf den Wert Null erfolgen kann. Erst wenn die Nadeleinheit das Faservlies wieder freigibt, kann die Abzugswalze frei beschleunigen, sodass wenigstens über der Eintauchperiode, während der die Nadeln in das Faservlies eingefahren sind, das Grenzdrehmoment eingreift. Die Abzugswalzen können durch die Drehmomentbegrenzung über der Eintauchperiode eine Drehzahl aufweisen, die eine Spannung in das Faservlies einleitet, die wenigstens über der Eintauchperiode grundsätzlich knapp unter oder genau auf dem korrespondierenden Grenzdrehmoment auf einem konstanten Wert gehalten werden kann.By determining a limit torque, the speed of the at least one take-off roll is not necessarily maintained at a constant value, since, for example, with a low or in the absence of a retention force by the intervention of the needles in the nonwoven fabric, the speed of the take-off roll can be increased, and only Upon engagement of the needle unit in the nonwoven fabric retention forces can occur, which allow the drive torque to rise to the limit torque to drive the at least one take-off roll. Only then can the speed of the take-off roll be reduced, wherein the reduction can optionally also be made to the value zero. Only when the needle unit releases the nonwoven fabric again, the take-off roll can accelerate freely, so engages the limit torque at least over the immersion period during which the needles are retracted into the nonwoven fabric. The take-off rolls may have, by the torque limitation over the immersion period, a speed which induces a tension in the nonwoven fabric which, at least over the period of immersion, may be kept substantially less than or precisely at the corresponding limit torque at a constant value.
Gemäß einem weiteren wichtigen Aspekt des erfindungsgemäßen Verfahrens zur Steuerung der Nadelmaschine wird ein Hubsensor bereitgestellt, wobei durch den Hubsensor eine Eintauchperiode erkannt wird, über der die Nadeln in das Faservlies einfahren und durch den Hubsensor wird eine Freilaufperiode erkannt, während der die Nadeln aus dem Faservlies herausgefahren sind, wobei ein Sensorsignal an die Steuereinheit ausgegeben wird und wobei die Steuereinheit das Antriebsdrehmoment zum Antrieb der Abzugswalze in Abhängigkeit des Steuersignals steuert. Mit besonderem Vorteil wird dabei das Ansteuern der Antriebseinheit mit der Drehmomentbegrenzung auf die Eintauchperiode begrenzt. Der Hubsensor liefert das Sensorsignal an die Steuereinheit, womit der Steuereinheit die Information vorliegt, ob die Nadeln in das Faservlies eingreifen oder nicht. Der Sensor kann beispielsweise auch ersetzt werden durch einen Drehwertgeber, der mit einem Antriebsmotor in der Hubmechanik zusammenwirkt und über den die Hubposition der Nadeleinheit hinreichen genau erkannt werden kann. Der vorliegend beschriebene Sensor kann folglich an jeder geeigneten Position angeordnet werden, um die Hubposition direkt oder indirekt zu ermitteln, und beispielswiese kann das Sensorsignal auch aus einem elektronischen Steuersignal zur Steuerung des Hubantriebes abgeleitet werden, sodass diese im weitesten Sinne der vorliegenden Erfindung ebenfalls den Hubsensor bilden kann.According to another important aspect of the method according to the invention for controlling the needle machine is a stroke sensor provided, wherein by the stroke sensor, a dipping period is detected, over which the needles retract into the nonwoven fabric and by the stroke sensor is detected a freewheeling period during which the needles are moved out of the nonwoven fabric, wherein a sensor signal is output to the control unit and wherein the control unit the drive torque for driving the take-off roller in response to the control signal controls. With particular advantage, the driving of the drive unit with the torque limitation is limited to the immersion period. The stroke sensor supplies the sensor signal to the control unit, whereby the control unit has the information as to whether the needles engage in the nonwoven fabric or not. The sensor can for example also be replaced by a rotary encoder, which cooperates with a drive motor in the lifting mechanism and over which the stroke position of the needle unit can be detected accurately enough. The presently described sensor can thus be arranged at any suitable position to determine the stroke position directly or indirectly, and for example, the sensor signal can also be derived from an electronic control signal for controlling the lifting drive, so that in the broadest sense of the present invention also the stroke sensor can form.
Um eine Überhöhung einer Zugkraft im Faservlies zu vermeiden, und um damit eine Beschädigung der Nadeln zu vermeiden, kann die Drehmomentbegrenzung zum Ansteuern der Antriebseinheit auf die Eintauchperiode begrenzt sein. Über der Freilaufperiode muss das Drehmoment der Antriebseinheit nicht zwingend begrenzt sein, da die Nadeln nicht in das Faservlies eingreifen und damit auch keine Rückhaltekraft im Faservlies verursachen können. Mit besonderem Vorteil kann dadurch das Ansteuern der Antriebseinheit in der Freilaufperiode mit einer vorbestimmten Drehzahl für die Abzugswalze erfolgen, wie nachfolgend näher erläutert.In order to avoid an increase in a tensile force in the nonwoven fabric, and thus to avoid damage to the needles, the torque limiter for driving the drive unit may be limited to the immersion period. Over the freewheeling period, the torque of the drive unit need not necessarily be limited, since the needles do not interfere with the nonwoven fabric and thus can not cause a retention force in the nonwoven fabric. With particular advantage, the driving of the drive unit can take place in the freewheeling period at a predetermined rotational speed for the take-off roll, as explained in more detail below.
Die Vorbestimmung der Drehzahl der Abzugswalze in der Freilaufperiode kann mit besonderem Vorteil in Abhängigkeit eines in der Eintauchperiode ermittelten Drehzahlprofils der Abzugswalze vorgenommen werden. Weist beispielsweise das Drehzahlprofil in der Eintauchperiode ein insgesamt geringes Drehzahlniveau auf, beispielsweise weil die Rückhaltekraft durch die Nadeln im Faservlies hoch ausfällt und damit die Drehmomentbegrenzung frühzeitig eingreift, so kann in der Freilaufperiode die Drehzahl der Abzugswalze so vorbestimmt werden, dass die sehr geringe Drehzahl der Abzugswalze in der Eintauchperiode aufgeholt wird. Hinkt also der Transport des Faservlieses dem fortschreitenden Nadelprozess hinterher, kann das Nacheilen des Faservlieses in seiner Transportbewegung aufgeholt werden durch eine Überhöhung der Drehzahl über der Freilaufperiode, also wenn keine Nadeln in das Faservlies eingreifen.The predetermination of the speed of the take-off roll in the freewheeling period can be made with particular advantage depending on a determined in the immersion period speed profile of the take-off roll. For example, if the speed profile in the dipping period on a total low speed level, for example, because the retention force by the needles in the fiber fleece fails high and thus engages the torque limiter early, so in the freewheeling period, the speed of the take-off roll can be predetermined so that the very low speed of Take-off roller is caught up in the dipping period. Thus, if the transport of the fiber fleece is lagging behind the advancing needle process, the lag of the fiber fleece in its transport movement can be made up by an increase in the rotational speed over the freewheeling period, ie if no needles engage in the fiber fleece.
Gemäß einem weiteren wichtigen Aspekt der Erfindung kann eine mittlere Transportgeschwindigkeit des Faservlies in der Transportbewegung vorgegeben werden, und die Vorbestimmung der Drehzahl für die Abzugswalze über der Freilaufperiode kann zusätzlich dadurch vorgenommen werden, dass die vorgegebene mittlere Transportgeschwindigkeit des Faservlies wenigstens über einem und vorzugsweise über mehrere Hubzyklen bestehend aus der Eintauchperiode und der Freilaufperiode eingehalten wird. Die mittlere Transportgeschwindigkeit ist insbesondere wichtig, wenn die Nadelmaschine im Verbund mehrerer Bearbeitungsmaschinen zur Vor- und Nachbearbeitung des Faservlieses betrieben wird. Die Nadelmaschine ist in der Regel einer Kreuzlegestation nachgelagert und einer Abnahmestation vorgelagert, und kann damit Bestandteil einer Vliesanlage sein. Durch den Verbund der Nadelmaschine zwischen vor- und nachgelagerten Stationen ergibt sich aus der Gesamt-Materialflussgeschwindigkeit des Vliesmaterials eine vorgegebene mittlere Transportgeschwindigkeit, die für einen störungsfreien Betrieb eingehalten werden muss, um die vor- und nachgelagerten Prozesse nicht negativ zu beeinflussen.According to a further important aspect of the invention, an average transport speed of the nonwoven fabric in the transport movement can be predetermined, and the predetermination of the speed for the take-off roll over the freewheeling period can additionally be carried out by the predetermined average transport speed of the nonwoven fabric at least over one and preferably over several Stroke cycles consisting of the immersion period and the freewheeling period is maintained. The average transport speed is particularly important when the needle machine is operated in the composite of several processing machines for pre and post-processing of the fiber web. The needle machine is usually downstream of a Kreuzlegestation and upstream of a removal station, and thus may be part of a nonwoven system. The composite of the needle machine between upstream and downstream stations results in a predetermined average of the total material flow velocity of the nonwoven material Transport speed, which must be maintained for a trouble-free operation in order not to negatively influence the upstream and downstream processes.
Die mittlere Transportgeschwindigkeit kann sich allerdings auch über der Bearbeitungsdauer ändern, sodass das Verfahren als wenigstens eine weitere Führungsgröße die mittlere Transportgeschwindigkeit über das Steuermodul aufnimmt. Dabei kann die Vorbestimmung der Drehzahl für die Abzugswalze über der Freilaufperiode zusätzlich dadurch vorgenommen werden, dass die vorgegebene mittlere Transportgeschwindigkeit des Faservlieses wenigstens über einen und vorzugsweise über mehrere Hubzyklen eingehalten wird. Liegt also die effektive Geschwindigkeit des Faservlies oberhalb der Transportgeschwindigkeit, so wird über der Freilaufperiode eine geringe mittlere Drehzahl gefahren, ist die effektive Transportgeschwindigkeit des Faservlies geringer als die erforderliche mittlere Transportgeschwindigkeit, so kann das Drehzahlprofil der Abzugswalze über der Freilaufperiode erhöht werden.However, the average transport speed can also change over the processing time, so that the method receives the average transport speed via the control module as at least one further reference variable. In this case, the predetermination of the rotational speed for the take-off roll over the freewheeling period can additionally be carried out in that the predetermined average transport speed of the fiber web is maintained at least over one and preferably over a plurality of lifting cycles. Thus, if the effective speed of the fiber web is above the transport speed, then a low average speed is driven over the freewheeling period, the effective transport speed of the fiber web is less than the required average transport speed, the speed profile of the take-off roll can be increased over the freewheeling period.
Das Verfahren kann durch den Aufbau eines Regelkreises über die Steuereinheit betrieben werden, und die Steuereinheit kann ein Antriebsmodul und ein Steuermodul zur Bildung des Regelkreises umfassen, wobei der Regelkreis betrieben werden kann mit: einer Führungsgröße, gebildet durch die vorgegebene mittlere Transportgeschwindigkeit, einer Regelgröße, gebildet durch ein Regelsignal, das an das Antriebsmodul ausgegeben wird und einer Störgröße, abgeleitet aus dem Drehzahlprofil der Abzugswalzen über der Eintauchperiode. Dabei kann durch die Steuereinheit eine Regelabweichung ermittelt und das Regelsignal so ausgegeben werden, dass eine Änderung der Drehzahl der Abzugswalzen in der Eintauchperiode eine diese Änderung kompensierende Anpassung der Drehzahl der Abzugswalzen in der Freilaufperiode bewirkt.The method may be operated by the construction of a control loop via the control unit, and the control unit may comprise a drive module and a control module for forming the control loop, wherein the control loop can be operated with: a reference variable, formed by the predetermined average transport speed, a controlled variable, formed by a control signal, which is output to the drive module and a disturbance derived from the speed profile of the take-off rolls over the immersion period. In this case, a control deviation can be determined by the control unit and the control signal can be output so that a change in the speed of the take-off rolls in the dipping period causes this adjustment compensating adjustment of the speed of the take-off rolls in the freewheeling period.
Mit weiterem Vorteil kann die Antriebseinheit wenigstens einen Motor und einen Drehwertgeber aufweisen, wobei der Drehwertgeber die Drehzahl des Motors erfasst und ein Rückkoppelsignal an die Steuereinheit und insbesondere an das Steuermodul ausgibt.With further advantage, the drive unit may have at least one motor and a rotary encoder, wherein the rotary encoder detects the rotational speed of the motor and outputs a feedback signal to the control unit and in particular to the control module.
Die Erfindung richtet sich weiterhin auf eine Nadelmaschine zur Nadelbearbeitung eines Faservlies mit einer Nadeleinheit aufweisend eine Vielzahl von Nadeln, wobei die Nadeleinheit zur Ausführung einer Hubbewegung über dem Faservlies ausgebildet ist, sodass die Nadeln oszillierend in das Faservlies einfahrbar und aus diesem wieder ausfahrbar sind, und mit wenigstens einer Abzugswalze, die in Bezug auf eine Transportbewegung des Faservlies der Nadeleinheit nachgelagert angeordnet ist und zur Einleitung einer Abzugskraft in das Faservlies dient, wofür eine Antriebseinheit zum rotierenden Antrieb der Abzugswalze vorgesehen ist und die mittels einer Steuereinheit ansteuerbar ist, wobei die Nadelmaschine ausgebildet ist zur Ausführung des vorgeschriebenen Verfahrens.The invention further relates to a needle machine for needle processing of a nonwoven fabric with a needle unit having a plurality of needles, wherein the needle unit is designed to perform a lifting movement over the nonwoven fabric, so that the needles are retractable retractable into the nonwoven fabric and out of this again, and with at least one take-off roller, which is arranged downstream with respect to a transport movement of the non-woven fabric of the needle unit and serves to initiate a withdrawal force into the non-woven fabric, for which a drive unit for rotating drive of the take-off roll is provided and which can be controlled by means of a control unit, wherein the needle machine is formed is to carry out the prescribed procedure.
Die Erfindung richtet sich weiterhin auf eine Steuereinheit für eine Nadelmaschine wie vorstehend beschrieben, um das erfindungsgemäße Verfahren auszuführen. Dabei kann die Steuereinheit wenigstens Folgendes umfassen: ein Antriebsmodul und ein Steuermodul zur Bildung eines Regelkreises, wobei der Regelkreis betreibbar ist durch eine Führungsgröße, gebildet durch die vorgegebene mittlere Transportgeschwindigkeit, eine Regelgröße, gebildet durch ein Regelsignal, das an das Antriebsmodul ausgegeben wird und eine Störgröße, abgeleitet aus dem Drehzahlprofil der Abzugswalzen über der Eintauchperiode, sodass durch die Steuereinheit eine Regelabweichung ermittelbar und das Regelsignal so ausgebbar ist, dass eine Änderung der Drehzahl der Abzugswalzen in der Eintauchperiode eine diese Änderung kompensierende Anpassung der Drehzahl der Abzugswalzen in der Freilaufperiode bewirkbar ist.The invention further relates to a control unit for a needle machine as described above, in order to carry out the method according to the invention. In this case, the control unit may comprise at least: a drive module and a control module for forming a control loop, wherein the control loop is operable by a reference variable, formed by the predetermined average transport speed, a controlled variable, formed by a control signal, which is output to the drive module and a Disturbance, derived from the speed profile of the take-off rolls over the immersion period, so that a control deviation can be determined by the control unit and the control signal can be output so that a change in the speed of the take-off rolls in the dipping period a change compensating this adjustment of the speed of the take-off rolls in the freewheeling period is effected ,
Weitere, die Erfindung verbessernde Maßnahmen werden nachstehend gemeinsam mit der Beschreibung eines bevorzugten Ausführungsbeispiels der Erfindung anhand der Figuren näher dargestellt. Es zeigt:
- Fig. 1
- eine schematische Ansicht einer Nadelmaschine zur Ausführung des erfindungsgemäßen Verfahrens,
- Fig. 2
- ein erstes Diagramm, das einen Geschwindigkeitsverlauf des Faservlieses über der Zeit zeigt, wobei die Geschwindigkeit in der Freilaufperiode einen ersten Kompensationsverlauf aufweist und
- Fig. 3
- ein zweites Diagramm, das den Geschwindigkeitsverlauf des Faservlieses über der Zeit zeigt, wobei die Geschwindigkeit in der Freilaufperiode einen zweiten Kompensationsverlauf aufweist.
- Fig. 1
- a schematic view of a needle machine for carrying out the method according to the invention,
- Fig. 2
- a first diagram showing a velocity profile of the nonwoven fabric over time, wherein the velocity in the freewheeling period has a first compensation curve and
- Fig. 3
- a second diagram showing the velocity profile of the nonwoven fabric over time, wherein the velocity in the freewheeling period has a second compensation curve.
Zur Ansteuerung der Abzugswalzen 12 dient eine Antriebseinheit 13, die über eine Steuereinheit 14 angesteuert wird. Die Steuereinheit 14 umfasst ein Antriebsmodul 17 und ein Steuermodul 18, wobei das Antriebsmodul 17 vorrangig der Steuerung der Drehzahl und insbesondere eines Drehmomentes des Motors 19 dient, wofür der Motor 19 mit einem Drehwertgeber 20 gekoppelt ist. Der Drehwertgeber 20 übermittelt dabei ein Rückkopplungssignal Rk an das Antriebsmodul 17. Das Rückkopplungssignal Rk kann von dem Antriebsmodul 17 an das Steuermodul 18 weitergeführt werden, wobei das Steuermodul 18 an das Antriebsmodul 17 ein entsprechend bestimmtes Regelsignal R ausgibt.For driving the take-off rolls 12 is a
Der Hubsensor 15 zur Erkennung der Hublage der Nadeleinheit 10 gibt das Sensorsignal 16 an das Steuermodul 18 aus, und das Sensorsignal 16 stellt an das Steuermodul 18 die Information bereit, ob sich die Nadeleinheit 10 in der Eintauchperiode te oder in der Freilaufperiode tf befindet.The
Als Führungsgröße zur Steuerung der Nadelmaschine 1 dient eine mittlere Transportgeschwindigkeit vt_m, die als Signal an das Steuermodul 18 ausgegeben wird. Die mittlere Transportgeschwindigkeit vt_m ergibt sich durch eine Integration der Nadelmaschine 1 im Verbund einer Vliesanlage, und die mittlere Transportgeschwindigkeit vt_m muss für einen störungsfreien Betrieb der Vliesanlage möglichst genau eingehalten werden. Abhängig von der Größe der Transportgeschwindigkeit vt_m gibt das Steuermodul 18 unter Berücksichtigung des Sensorsignals 16 aus dem Hubsensor 15 eine Regelgröße an das Antriebsmodul 17 aus, die gebildet ist durch ein Regelsignal R. Die Differenz zwischen einem Geschwindigkeitswert des Rückkopplungssignals Rk und des Regelsignals R ergibt eine Störgröße, die damit abgeleitet ist aus dem Drehzahlprofil der Abzugswalzen 12 über der Eintauchperiode te.As a reference variable for the control of the needle machine 1 is a mean transport speed vt_m, which is output as a signal to the
Über die erfasste Drehzahl durch den Drehwertgeber 20 wird der Motor 19 und damit die Abzugswalze 12 drehmomentgeregelt, derart, dass das Drehmoment ein vorgegebenes Grenzdrehmoment nicht überschreitet. Damit wird eine Schädigung der Nadeln 11 vermieden, da durch ein begrenztes Drehmoment in den Abzugswalzen 12 die Abzugskraft im Faservlies 100 begrenzt bleibt. Die Drehmomentbegrenzung wird dabei nur über der Eintauchperiode te vorgesehen, da nur dann eine Schädigung der Nadeln 11 hervorgerufen werden kann. Befindet sich die Nadeleinheit 10 über der Freilaufperiode tf, vorgegeben durch das Sensorsignal 16 des Hubsensors 15 an das Steuermodul 18, so kann abhängig von der Größe des Regelsignals R in Abweichung vom Rückkopplungssignal Rk die Drehzahl über der Freilaufperiode tf derart angepasst werden, dass sich die mittlere Transportgeschwindigkeit vt_m für das Faservlies 100 ergibt.About the detected speed by the
In die Ermittlung des Grenzdrehmomentes fließen u.a. die Werte Vliesgewicht, Vliesbreite, Transportgeschwindigkeit, Geschwindigkeitsverzug zwischen Einlauf und Auslauf der Nadelmaschine, der Antriebsleistung und dem Drehmoment des Motors ohne Material ein.In the determination of the limit torque flow u.a. the values fleece weight, fleece width, transport speed, speed delay between inlet and outlet of the needle machine, the drive power and the torque of the motor without material.
Die
Über der Eintauchperiode te kann die Geschwindigkeit des Faservlieses 100 einen konstanten Minimalwert aufweisen, der auch den Wert Null annehmen kann. Gelangen die Nadeln 11 wieder außer Eingriff mit dem Faservlies 100 und beginnt die Freilaufperiode tf, so kann in dieser ein Kompensationsverlauf K1 eingestellt werden, der eine Geschwindigkeit des Faservlies 100 durch eine korrespondierende Drehzahl in der Abzugswalze 12 so einstellt, dass die mittlere Geschwindigkeit des Faservlies 100 der vorgegebenen mittleren Transportgeschwindigkeit vt_m entspricht.Over the immersion period te, the speed of the nonwoven 100 may have a constant minimum value, which may also be zero. If the
Der Geschwindigkeitsverlauf D der Transportgeschwindigkeit v(x) des Faservlies 100 gemäß
er Regelkreis regelt dabei unter Berücksichtigung der Führungsgröße, gebildet durch die geforderte mittlere Transportgeschwindigkeit vt_m, die Geschwindigkeit über der Freilaufperiode tf derart aus, dass unter Bildung der Kompensationsverläufe K1 und K2 sich die mittlere Transportgeschwindigkeit vt_m einstellt. Der höhere oder niedrigere Geschwindigkeitsverlauf D des Faservlies 100 kann beispielsweise abhängig sein von der Vorverdichtung des Faservlies 100, von der Dicke der Nadeln 11 oder von der Eintauchtiefe der Nadeln 11, wobei die Transportgeschwindigkeit v(x) über der Eintauchperiode te über eine Drehmomentbegrenzung erfolgt. Erreichen die Abzugswalzen 12 ein Grenzdrehmoment, so senkt die Steuereinheit 14 die Geschwindigkeit der Abzugswalze 12 derart ab, dass das Grenzdrehmoment nicht überschritten wird. Ist die Rückkhaltekraft durch die Wechselwirkung der Nadeln 11 mit dem Faservlies 100 größer, und senkt sich die Transportgeschwindigkeit v(x) über der Eintauchperiode te stärker ab, so kann durch den im Steuermodul 18 gebildeten Regelkreis der Kompensationsverlauf K1 oder K2 so angepasst werden, dass sich schließlich die mittlere Transportgeschwindigkeit vt_m einstellt.In this case, the control loop regulates the speed over the freewheeling period tf taking into account the reference variable, formed by the required mean transport speed vt_m, such that the mean transport speed vt_m is established while forming the compensation curves K1 and K2. The higher or lower velocity profile D of the
Die Erfindung beschränkt sich in ihrer Ausführung nicht auf das vorstehend angegebene bevorzugte Ausführungsbeispiel. Vielmehr ist eine Anzahl von Varianten denkbar, welche von der dargestellten Lösung auch bei grundsätzlich anders gearteten Ausführungen Gebrauch macht. Sämtliche aus den Ansprüchen, der Beschreibung oder den Zeichnungen hervorgehenden Merkmale und/oder Vorteile, einschließlich konstruktiver Einzelheiten oder räumlicher Anordnungen, können sowohl für sich als auch in den verschiedensten Kombinationen erfindungswesentlich sein.The invention is not limited in its execution to the above-mentioned preferred embodiment. Rather, a number of variants is conceivable, which makes use of the illustrated solution even with fundamentally different types of use. All of the claims, the description or the drawings resulting features and / or advantages, including structural details or spatial arrangements may be essential to the invention both in itself and in various combinations.
- 100100
- Faserfliesfiber flow
- 11
- Nadelmaschineneedle loom
- 1010
- Nadeleinheitneedle unit
- 1111
- Nadelnneedles
- 1212
- Abzugswalzeoff roll
- 1313
- Antriebseinheitdrive unit
- 1414
- Steuereinheitcontrol unit
- 1515
- Hubsensorstroke sensor
- 1616
- Sensorsignalsensor signal
- 1717
- Antriebsmoduldrive module
- 1818
- Steuermodulcontrol module
- 1919
- Motorengine
- 2020
- DrehwertgeberRotary encoder
- 2121
- Stichplatteneedle plate
- 2222
- Hubmechaniklifting mechanism
- TT
- Hubzyklusstroke cycle
- teth
- EintauchperiodeImmersion period
- tftf
- FreilaufperiodeFreewheeling period
- vt_mvt_m
- mittlere Transportgeschwindigkeitaverage transport speed
- RR
- Regelsignalcontrol signal
- RkRk
- RückkopplungssignalFeedback signal
- XX
- Transportbewegungtransport movement
- K1K1
- Kompensationsverlaufcompensation History
- K2K2
- Kompensationsverlaufcompensation History
- sese
- Einstichtiefepenetration depth
- v(x)v (x)
- Transportgeschwindigkeittransport speed
- tt
- ZeitTime
- DD
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Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102014118385.1A DE102014118385A1 (en) | 2014-12-11 | 2014-12-11 | Method for controlling a needle machine |
Publications (2)
Publication Number | Publication Date |
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EP3031968A1 true EP3031968A1 (en) | 2016-06-15 |
EP3031968B1 EP3031968B1 (en) | 2017-09-13 |
Family
ID=54324777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15002896.7A Active EP3031968B1 (en) | 2014-12-11 | 2015-10-09 | Method for controlling a needle machine |
Country Status (3)
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EP (1) | EP3031968B1 (en) |
CN (1) | CN105696202B (en) |
DE (1) | DE102014118385A1 (en) |
Families Citing this family (3)
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CN107435187B (en) * | 2017-07-25 | 2019-05-28 | 常州大学 | Equal static pressure linkage D refraction statics braider |
CN108085874B (en) * | 2017-12-23 | 2020-05-22 | 汕头三辉无纺机械厂有限公司 | Real-time acupuncture track simulation system |
US11655870B2 (en) * | 2019-10-08 | 2023-05-23 | Honeywell International Inc. | Method for manufacturing composite fiber preform for disc brakes |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996023096A1 (en) * | 1995-01-26 | 1996-08-01 | Asselin | Process for adjusting the feed of a needling machine and needling machine implementating this process |
JPH08260332A (en) * | 1995-03-20 | 1996-10-08 | Okuma Mach Works Ltd | Intermittent feeding apparatus for nonwoven cloth manufacturing machine |
DE69603706T2 (en) | 1995-01-12 | 2000-04-06 | Asselin | NEEDLE MACHINE AND METHOD FOR CONTROLLING A FEED MOVEMENT THEREFOR |
WO2002068747A1 (en) * | 2001-02-26 | 2002-09-06 | Messier-Bugatti | Method and control device for advancing a needle punched fibrous sheet |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6568050B2 (en) * | 2001-02-26 | 2003-05-27 | Messier-Bugatti | Method and installation for advancing a needled fiber plate |
CN100491621C (en) * | 2007-03-17 | 2009-05-27 | 江苏省仪征市海润纺织机械有限公司 | Process and apparatus for producing needle entangled non-woven material with even stitches |
CN202809186U (en) * | 2012-08-17 | 2013-03-20 | 苏州希尔克新材料有限公司 | High-temperature resistant carpet sleeve processing device for pleating machine |
-
2014
- 2014-12-11 DE DE102014118385.1A patent/DE102014118385A1/en not_active Withdrawn
-
2015
- 2015-10-09 EP EP15002896.7A patent/EP3031968B1/en active Active
- 2015-12-03 CN CN201510882538.4A patent/CN105696202B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69603706T2 (en) | 1995-01-12 | 2000-04-06 | Asselin | NEEDLE MACHINE AND METHOD FOR CONTROLLING A FEED MOVEMENT THEREFOR |
WO1996023096A1 (en) * | 1995-01-26 | 1996-08-01 | Asselin | Process for adjusting the feed of a needling machine and needling machine implementating this process |
JPH08260332A (en) * | 1995-03-20 | 1996-10-08 | Okuma Mach Works Ltd | Intermittent feeding apparatus for nonwoven cloth manufacturing machine |
WO2002068747A1 (en) * | 2001-02-26 | 2002-09-06 | Messier-Bugatti | Method and control device for advancing a needle punched fibrous sheet |
Also Published As
Publication number | Publication date |
---|---|
CN105696202B (en) | 2018-08-17 |
CN105696202A (en) | 2016-06-22 |
EP3031968B1 (en) | 2017-09-13 |
DE102014118385A1 (en) | 2016-06-16 |
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