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EP1086264B1 - Banc d'etirage de regulation - Google Patents

Banc d'etirage de regulation Download PDF

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Publication number
EP1086264B1
EP1086264B1 EP99924633A EP99924633A EP1086264B1 EP 1086264 B1 EP1086264 B1 EP 1086264B1 EP 99924633 A EP99924633 A EP 99924633A EP 99924633 A EP99924633 A EP 99924633A EP 1086264 B1 EP1086264 B1 EP 1086264B1
Authority
EP
European Patent Office
Prior art keywords
mass
control
fibre
card
drawing unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP99924633A
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German (de)
English (en)
Other versions
EP1086264A1 (fr
Inventor
Götz Theodor GRESSER
Christian Müller
Christian Griesshammer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP1086264A1 publication Critical patent/EP1086264A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/32—Regulating or varying draft
    • D01H5/38—Regulating or varying draft in response to irregularities in material ; Measuring irregularities
    • D01H5/42—Regulating or varying draft in response to irregularities in material ; Measuring irregularities employing electrical time-delay devices

Definitions

  • the invention relates to a method and an apparatus for controlling the Distortion of a fiber mixture (e.g. a sliver) of a textile machine, whereby Means are provided to detect the fluctuations in the mass of fiber which is fed to a drafting unit which is at least equipped with a variable, the warpage compensating for fluctuations in mass and a delay time is provided to the runtime of the fiber mass from the measuring means to to be taken into account at a regular point of use
  • a fiber mixture e.g. a sliver
  • a device is known from EP-A1 533 483, influencing factors, which influence the measuring signal of the measuring element by a fuzzy control device recorded and linked to a knowledge base. This then becomes a Correction value for the measurement signal created.
  • the Delivery speed of the fiber material are used, which is emitted by the drafting system becomes.
  • the correction value relates to the corresponding design of the measured value determined based on influencing factors and not on the determination of the standard point of use.
  • use this embodiment proposed that based on the evaluation of the response signal a signal analysis of the measuring element at the drafting system output is carried out, whereby appropriate interventions can be made. That means a correction of the standard point of use only takes place when the fault location in the fiber material Has already run through the drafting system and can therefore no longer be corrected.
  • a further measuring device at the drafting system exit is necessary as well a complex fuzzy control device.
  • a device can be found in DE-A1-42 15 682, with a correction of the Standard operating point is made according to a certain procedure.
  • the procedure to correct the control point of operation is only started when a transient There is a signal at the measuring element in front of the drafting system, which has a predetermined tolerance exceeds. With the help of the response signal, which is measured by a measuring device
  • the drafting system output is recorded via the control system in comparison to the transient A corresponding intervention is carried out in order to close the control point correct.
  • This system is not in continuous operation and also requires a measuring device at the exit of the drafting system.
  • a device is known from DE-A1 196 15 947, based on a function is determined from several CV values, the minimum of which is an optimized one Parameters such as control point or gain for controlling the line or the card results.
  • the optimized parameter is in a pre-operational Test or adjustment run of the line or card was determined and largely unchanged during operation held.
  • This object of the invention is achieved in part in that, in order to change certain control parameters, the delivery speed (LG) of the fiber mixture (7) and / or the comparison between the measured mass profile of the fiber material (F1) delivered by the drafting unit with a predetermined target mass profile ( Should) is used.
  • delivery speed refers to the speed of the fiber material that is fed to the drafting system.
  • the measuring element for recording the mass fluctuations is located - seen in the direction of transport - before entering the drafting unit. This device makes it possible for the control intervention to take place at the optimum time or in an optimized order of magnitude in order to almost completely correct a mass deviation determined by the measuring element.
  • the drafting unit could have only one draft zone (single-zone drafting unit) or be provided with several fields of arrears (e.g. early arrears and main arrears).
  • the change in position of the rule point of use is carried out on the basis of a curve predetermined for the control.
  • This curve was previously created manually based on experience and test results and the Control used to determine a correction value.
  • the curve is based on the values - distance of the control point of use to the measuring point and the delivery speed of the fiber material transferred to the drafting system.
  • the control parameter is in particular the setting of the control intensity, which identifies a value by which the delay is based on a measured Difference signal of the initial mass (mean value of the fiber mass delivered) is changed to a target mass.
  • the intervention in the delay size should be dimensioned so that the actual value is returned to the setpoint.
  • the mass profile be in the form of a spectrogram is mapped with a normal spectrogram specified to the control unit is compared.
  • the term "compared” is to be understood here that the determined spectrogram by a control program (software) in the Control unit is placed over the normal spectrogram, the from the contour of the Normal spectrogram determined deviations via the corresponding electronic Evaluation can be determined and evaluated. With this evaluation device can in particular appearing "mountains” and / or "chimneys" of the actual spectrogram compared to the normal spectrogram.
  • the measures for changing the control parameters can include: adjustment the control intensity, i.e. Determining the size of the change in default using a determined difference signal between actual and target value (average fiber mass), Postponement of the rule's starting point to one side or the other, increase the contact pressures of the drafting system pressure rollers, change of the distance between the draft and other measures.
  • adjustment the control intensity i.e. Determining the size of the change in default using a determined difference signal between actual and target value (average fiber mass)
  • Postponement of the rule's starting point to one side or the other increase the contact pressures of the drafting system pressure rollers, change of the distance between the draft and other measures.
  • the selection of the measure is based on the evaluation taken, whereby the control is based on a catalog of measures (expert system) can be laid.
  • the spectrogram deviations are preferably in the range between 5 and 150 cm period lengths are used for the measurement process.
  • the mass profile is represented as an average value, which is compared with a predetermined target value.
  • Measures for correcting the control devices can include, for example, a shift of the control starting point to one side or the other or the adjustment amount of the delay based on a determined difference signal between the actual and target value.
  • the fiber mass supplied to the drafting unit be changed per measurement interval in order to set the control parameters.
  • the drafting unit is loaded with an increased fiber mass for an evaluation process and with a lower fiber mass for a further measurement process.
  • a mass error is deliberately generated by the machine (or device) upstream of the drafting unit in order to check or possibly correct the effectiveness of the control intensity.
  • the determined coefficient of variation (CV value) can be used, the is compared with a predetermined CV value of the target mass profile. It can On the one hand, the length CV value with a cutting length between 20 cm and 3 m was used become.
  • the shift of the standard operating point can be used.
  • the fiber quantity is preferably supplied by a card of the drafting unit. So that the adjustment of the control parameters also meets the conditions during the working operation, it is proposed that a warm-up period be set when the card is started up, during which certain monitoring operations by the control system are stopped. Such monitoring systems are also addressed which measure the mass profile of the fiber mixture in the drafting system. This means that the control parameters can only be adjusted after the warm-up function has expired.
  • the work units, over and between which the fiber material is passed have a different processing characteristic, which does not necessarily correspond to the operating conditions. For example, cold rollers can tend to detach fibers from the fiber material. This would in turn lead to mass fluctuations that are purely system-related.
  • the adjustment of the control devices should be carried out during operating conditions, ie after the warm-up phase.
  • a meter counter can be switched on, which is intended for the statement of the production.
  • the goods produced during the warm-up phase can be stored in a separate can. This separately stored goods can be returned to the blow room for reprocessing.
  • the warm-up phase can either be determined in time by a preset time value are monitored or, as further suggested, by temperature sensors become. Here, e.g. a sensor for temperature measurement for a specific roller be attached. As soon as a predetermined temperature is reached, the Control communicated the end of the warm-up phase, which means this on operating phase is converted.
  • the invention is achieved by a device, means being provided with which the position of the control point of application to the measuring element is based on the delivery speed of the fiber amount is determined.
  • control unit in particular from a Microcomputer, which is stored and stored in the control unit Data associated with signals from a measuring element to record the delivery speed of the fiber material are transmitted to the control unit, the introduction the change in default.
  • the fiber material from one card to one subsequent drafting unit is supplied and the control unit of the card with Means is provided to a correction signal for determining the position of the control point of the subsequent drafting system to the control of the drafting system for introduction of the change in default.
  • the invention is also achieved by a device, at least one further Means (28) are provided to measure the mass of the drafting unit (2) Detected fiber material (F1) and the signals of the agent to the control unit (S) are given, which are based on a predetermined target value (target, M) the deviations are determined and control signals are generated in accordance with the deviations to change certain control parameters.
  • a device at least one further Means (28) are provided to measure the mass of the drafting unit (2) Detected fiber material (F1) and the signals of the agent to the control unit (S) are given, which are based on a predetermined target value (target, M) the deviations are determined and control signals are generated in accordance with the deviations to change certain control parameters.
  • the textile machine can advantageously be a card.
  • control parameters (Regular intensity) the amount of fiber mass delivered by the card for different Measuring periods is varied.
  • the speed of the feed roller to the card can be constant and the speed of the Pickup roller can be changed via the control unit.
  • a timer In order to match the measuring periods to the different amounts of fiber supplied intended to use a timer to delay the time between start the changed delivery quantity and the time when the changed delivery quantity in the Drafting unit is processed to be considered.
  • the timer in As part of a software component in the controller.
  • Means are provided for monitoring the warm-up phase, via which the Implementation for setting the control parameters is released. These funds can Temperature sensors to be attached to the card or drafting unit are. It is more advantageous to attach these sensors to the drafting unit, since this usually has a longer warm-up phase than the card.
  • a card 50 is shown schematically in FIG. 1, which has a drafting unit 1 (short: drafting system) and a belt storage 62 is arranged downstream.
  • Card 50 is included provided with a filling shaft 80 over which the fiber material of a feed roller 70 is fed.
  • the feed roller 70 transfers the fiber material to the next one Licker-in roller 8, from which the fiber material onto the subsequent drum 110 is transferred.
  • the drum 110 is provided with sets, not shown, those with trimmings of a revolving one arranged above the drum 110 Interact with cover 111.
  • the processed fiber material then reaches the area of a take-off roller 112, is removed there and passes to a subsequent one via transport rollers 114 Cross conveyor belt 115. That from the transport rollers 114 onto the cross conveyor belt 115 nonwoven is released by the transverse movement of the cross conveyor belt 115 formed into a sliver F and via the deflection roller 18 to the drafting device 1 transferred.
  • the sliver F traverses the cross conveyor belt 115 a sensor 17, which is connected via line 560 to a control unit SE stands.
  • the sensor 17 can be equipped with stepped rollers, which the sliver mass determine and deliver the signal to the control unit SE.
  • This signal is used for long-term regulation of the card 50, the speed of the feed roller 70, which is driven via the drive path 62 and the gear 164 controlled becomes.
  • a sliver store 200 and a measuring element 222 are arranged between the deflection roller 18 and the drafting device 1 .
  • the sliver storage 200 is used for Compensation for the differences between the delivery speed of the card and the feeding speed of the drafting system, which is caused by the control interventions in the inlet of the Draft 1 arise.
  • the sliver storage 200 is connected to the line 154 with the Control unit SE connected via which the degree of filling (e.g. sag of the sliver loop) are transmitted in the memory 200 of the control unit SE.
  • sensor 222 could (as shown in FIG. 2) with a pair of sensing rollers be equipped, wherein at least one of the rollers is movably mounted to the To sample the sliver.
  • the sampled signal is then on line 151 delivered to the control unit SE.
  • the drafting system 1 consists essentially of two draft zones, the pre-draft zone VV and the main default zone HV.
  • the pre-delay zone VV is formed by the Roller pairs 224 and 225, fixed over the schematically shown drive path 43 are coupled together. That means the speed ratio (delay ratio) is fixed between the pairs of rollers 224 and 225.
  • the main default area is between the roller pairs 225 and 26, the roller pair 26, the is driven by a motor M11 via the transmission 140 and the drive path 41, is driven at a constant speed.
  • the engine M11 is over a Frequency converter 36 controlled by the control unit SE.
  • the transmission 140 is over a drive path 39 connected to a differential gear 42, which via a Control motor M2 can be overridden.
  • the control motor M2 is via a frequency converter 37 controlled by the control unit SE. Via the gear 42 and the Drive path 43 is the speed change of the roller pairs 224 and 225 with respect to the constant speed of the roller pair 26, if a control intervention is required is
  • the sliver F1 formed at the outlet of the drafting device 1 passes through a sensor 28 and passes over the calender rolls 29, the funnel wheel 33 into the can K, where it stored in a loop shape.
  • the calender rolls are driven 29 and the funnel wheel 33 via the drive path 48 by a Gear 45 is driven, which in turn via the drive connection 46 with the Gear 140 is drivingly connected.
  • the gear 45 via the drive path 49 of the can plate 34 driven.
  • the regulation of mass fluctuations, which the sensor 222 sends to the Control unit SE are transmitted by changing the speed of the roller pairs 224 and 225 via the control motor M2, which causes the delay in the main delay field HV changes.
  • To determine the mass deviations is in the control unit SE is based on a target value (target), which is compared with the actual value. The differences derived from this trigger the control process described.
  • the measuring point MS in the pair of sensing rollers 222 is in a distance A from the standard operating point R.
  • the standard starting point R is a fictitious point and represents the point at which the rule intervention is seen in time should take place in order to regulate the mass deviation determined at the measuring point MS.
  • the location of the control point which is a control parameter is dependent on several factors. Tolerances also play a role here within the control system or within the drafting unit Role. Furthermore, the level of the pressure load also plays a role in the adjustment the pressure rollers of the roller pairs 224 to 26 a role. Likewise, for optimal Adjustment also the distance C between the roller pairs 225 and 26 accordingly adjust. Furthermore, the intervention in the size of the delay is based on the determined difference signal between the target and actual value of the fiber mass an important It is important to include the resulting difference in the delay change to allow for a full compensation of the mass deviation can be achieved.
  • the control unit SE turns a curve Deposited standard spectrogram 66, which was formed by a sliver, that is technically feasible and error-free.
  • the sensor 28 e.g.
  • an inductive Sensor can be) the spectrogram of the sliver F1 in conjunction with the control unit SE, which is shown schematically under No. 67.
  • These two spectrograms 66 and 67 are superimposed by a software routine placed, resulting in the representation corresponding to FIG. 3.
  • the actual spectrogram 67 in this case is above the curve of the normal spectrogram runs.
  • the chimney 70 represents a periodic error.
  • control parameters such as the distance A changed and then another measurement was made.
  • Appropriate interventions can be used to evaluate the deviations from the normal spectrogram in the control parameters (as described above) to then carry out further measurements. It would be conceivable the system to store an error catalog, which results in the corresponding intervention in the control parameters results. These adjustments are carried out until a satisfactory one Result of the actual spectrogram in relation to the normal spectrogram is present.
  • the CV value could also be used be included in the consideration for setting the control parameters, if no satisfactory results can be achieved with the first method.
  • the target mean MW of the sliver mass is used as a basis.
  • control characteristic using the method described below (Control intensity) of the control device in the event of deviations downwards and upwards the specified sliver mass can be checked or adjusted.
  • Control intensity Control intensity
  • the mean value of the reduced sliver mass first drops (below the target MW) and in the example shown is partially compensated for by the regulating device, up to a mean value MU.
  • This mean value MU is at a distance a from the target mean value MW, from which it can be seen that the reduced sliver mass was not completely regulated by the regulating device.
  • settings (as described in the previous example) have to be made to the control parameters in order to obtain the optimal readjustment, ie the return to the desired mean value MW.
  • the control intensity, ie the intervention in the delay size can be changed.
  • the intervention in the delay based on the determined mass difference signal is modified or corrected accordingly.
  • the delivery quantity from the card to the drafting system can be increased (indicated by dash-dotted lines in FIG. 4) and the result of the adjustment can also be checked or corrected by adjusting corresponding control parameters.
  • an average value MO with the distance b from the ideal average value MW can also be set, as a result of which an adjustment of the control parameters (eg control intensity) is also necessary.
  • control intensity e.g control intensity
  • different measuring lengths of the fiber slivers can also be used to determine the mean value. It is therefore possible to make an optimal adjustment of the control device by changing the control intensity, by varying the distance A, by changing the center distance C or by changing the pressure load on the pressure rollers accordingly.
  • a temperature sensor is on one of the rollers of the roller pairs 114 59 attached, the signal via line 60 to the control unit SE delivers.
  • this temperature sensor which can also be found elsewhere in card 50 the warm-up function of the machine is monitored. This means, When the machine starts up (with cylinders still cold), various monitoring and control functions deactivated until via line 60 A temperature signal is transmitted from the sensor 59, which is a predetermined setpoint equivalent. Only then is e.g. the meter counter for the material produced, the Regulating device of the card 50 or the subsequent drafting unit 1 and the other monitoring devices started. It must be taken into account that the drafting unit can have a longer warm-up phase than the card, which requires corresponding time supplements.
  • the temperature sensor can also be attached to the drafting unit.
  • the warm-up function is carried out because there are cold rollers and other working elements Material can attach and optimal work is not yet guaranteed.
  • the rubber jackets of the pressure rollers have a different hardness when cold than in warm condition, which creates other technological requirements in the default work result and thus also the sliver quality of the sliver produced influence.
  • the goods produced during the run-up phase (warm-up phase) can stored in a separate jug and then back to the blow room for return be transported back into the processing process.
  • a drafting unit 1 which consists of a pre-draft zone VV and a main default zone HV exists.
  • the pre-delay zone VV is formed from the successive pairs of rollers 3 and 4.
  • the main draft zone HV is formed from the roller pairs 4 and 5.
  • lower roller provided with a drive device, which will be described in more detail below becomes.
  • the upper roller of these roller pairs are usually under pressure on the lower rollers and are driven by friction.
  • the Drafting unit 1 is preceded by a measuring element 7 through which the sliver F is carried out first before it reaches the drafting unit. Instead of one single sliver F could also have several slivers lying next to each other be fed.
  • the measuring element 7 consists of a stationary roller 8, which also has a drive described below is driven.
  • the roller 8 is one Assigned roller 9, which rests spring-loaded on the roller 8 and when occurring Mass fluctuations in the sliver F can perform evasive movements. This Evasive movements are recorded in the measuring element 10 and started via a timing element Z. a control unit 20 issued.
  • the roller 8 is assigned a sensor 12, which is the actual speed of this roller and thus the delivery speed of the sliver F to the drafting unit 1 is scanned.
  • the signal from the sensor 12 is Delivered to the control unit 20 via the line 13.
  • Following the drafting unit 1 can be another monitoring organ 15 for the sliver formed F1 may be provided.
  • This monitoring member 15 is used in particular for monitoring the long-term drift of the sliver formed and switches the machine off, when the fiber mass migrates outside a predetermined tolerance range.
  • the measuring element 7 monitors the short-term fluctuations in the sliver and triggers with it Signal the control process for changing the delay to the measured To regulate or regulate mass fluctuations.
  • the control unit 20 controls a main motor M via the line 22, which via a drive connection 23 is connected to a main transmission 25.
  • This main gear 25 is connected via the drive connection 27 to a regulating gear 30 (e.g. a Differential gear) connected.
  • the transmission 30 is overridden a control motor M1 which is connected to the control unit 20 via the path 32.
  • the Gear 30 is connected via a drive path 31 to the lower roller of the pair of rollers 4 connected by drive.
  • a drive path 36 is removed from the drive path 31, which leads to the driven rollers of the roller pairs 3 and 7. there There may be 36 translation stages, not shown, in this path, in order to corresponding Speed ratios to be taken into account.
  • a setpoint 38 which is predetermined for the control unit and is predetermined is shown schematically and is used for the setting of the default.
  • a control starting point R between the pairs of rollers 4 and 5. Due to the location of this control point R is determines the point in time at which the control intervention must take place in order to be 7 compensate for fluctuations in mass by changing the delay.
  • the actual position of the standard operating point R depends on the technology of the stretching process and is normally at a short distance from rear roller pair 4 of the main draft zone HV. Practice has shown that the position of this control point R changes with the changed delivery speed of the supplied fiber goods and thus shifts with changed production. This could one especially when creating and evaluating a spectogram (Representation of mass fluctuations in the frequency domain) see how this Example is shown in Figures 6 to 8. In Fig. 6 the amplitude level is above one logarithmic linear scale (centimeters). This curve increases until you reach a curve mountain and then fall flat. This Curve display is referred to as the ideal, and is in terms of uniformity to strive for the sliver.
  • the delivery speed was reduced and the location the control point R for the position of the measuring point MS (distance L) has not changed. That means, based on the lower delivery speed, only the time was adjusted, which varies from the measuring point MS until the fixed control point of use is reached R has changed. From this diagram of FIG. 7 it can be seen that the Curve now has two surveys, which indicates a poorer quality of the formed Sliver F1 indicates. That means the uniformity of the sliver F1 is not constant and there are signs of periodic errors.
  • FIG. 9 The results of these investigations are shown in a diagram according to FIG. 9, wherein a curve S is shown, which over the delivery speed LG (meters per Minute) and the length L (mm) is plotted, where L is the distance between the Measuring point MS and the control point R represents.
  • a curve S is shown, which over the delivery speed LG (meters per Minute) and the length L (mm) is plotted, where L is the distance between the Measuring point MS and the control point R represents.
  • the position of the control point R can now correspond to the existing one Delivery speed LG can be determined. This then gives the time interval according to which the control intervention in relation to the measuring point MS is carried out got to.
  • a tolerance field TG is also shown, which covers an area of the Delivery speed indicates in which there is no correction of the standard point of use takes place.
  • This tolerance field TG is usually in the range of the delivery speed placed, in which the greatest time is normally worked.
  • the tolerance zone should prevent "rocking" or overloading of the control system. The This means that smaller delivery fluctuations around a standard value do not have to be continuous lead to a correction of the rule's starting point, since these are negligible.
  • the drive system is set so that with a constant delay (different Circumferential speeds of the roller pairs 4 and 5) is driven.
  • the Advance between the roller pairs 3 and 4 remains constant.
  • Once over the roller 9 determined an unevenness in the sliver mass (thin or thick point) is detected via the measuring element 10 and via the line 11 to a timing element Z issued.
  • the timer Z is generally integrated in the control unit 20 and forms a time delay factor based on the delivery speed until the detected Mass fluctuations reached the standard operating point R and there by changing the delay is settled. This regulation of the mass fluctuation takes place under Using the setpoint 38 in the control unit 20, which after evaluating the Signals a control signal 32 to the control motor M1.
  • This motor M1 is applied the control gear 30, whereby the speed of the pair of rollers 4 and thus the Delay size in the main delay HV is changed. Through this intervention, a Thick or thin point in the sliver mass can be compensated.
  • Drive connection 36 becomes the drive of the pair of rollers 3 and the measuring element 7 entrained in accordance with the changed speed of the pair of rollers 4. Thereby the speed ratio between the roller pairs 7, 3 and 4 remains constant.
  • the Rotation speed of the pair of rollers 5, the gear 25 and the drive train 35th is also kept constant.
  • the time delay via the timer To be able to set Z exactly, a sensor 12 is arranged which detects the exact speed the roller 8 of the measuring element 7 scans and via the path 13 of the control unit 20th transmitted.
  • the route 60 is also with a drafting unit 1 provided which has a drive or control device, as in Example of Fig. 5 is described.
  • this section 60 has a can rack 62, wherein via calender rolls 63, a funnel wheel 64, the sliver F1 into a Kanne K is placed.
  • the drive of these elements the can tray 62 also removed from the main gear 25. That is, the Drive between the can tray and the front pair of rollers 5 of the drafting unit 1 is in a constant ratio.
  • the card 50 is controlled by a control unit 51.
  • the sliver F formed on the card is passed through a pair of measuring rollers 53, that monitors the long-term drift of the sliver and corresponds via a path 54 Outputs signals to the control unit 51. These signals are essentially used to control the feed roller 55.
  • a speed signal can be taken, which is also via path 54 the control unit 51 is released.
  • the delivery speed is based on this speed signal LG of the sliver F is determined in the control unit 51 and with the Table 40, which is also stored in the controller 51, compared.
  • FIG. 10 A further diagram is shown in FIG. 10 (numbers have been omitted), where for different materials (stack, type of cotton, etc.) separate Curves S1-S3 are shown to determine the location of the delivery speed LG Determine the standard operating point R for the respective material. In this case manually entered the appropriate material selection beforehand.
  • the invention is not limited to Combination teasel-track limited, but it is also conceivable that others Machines are upstream of the route. The invention then essentially comes to be used when textile processing machines are connected upstream of the drafting unit are the larger fluctuations in production and thus in delivery speed exhibit.
  • the proposed facility will keep the quality constant with regard to the uniformity even with larger fluctuations in the delivery speed maintained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (31)

  1. Procédé utilisé pour commander l'étirage d'un mélange de fibres (F), (par exemple, un ruban de fibres) d'une machine textile (50,1), et où, des moyens (222) sont prévus pour enregistrer les variations de masse du mélange de fibres (F), lequel est dirigé vers une unité de train d'étirage (1) qui est au moins pourvue d'une zone d'étirage variable (HV) égalisant les variations de masse, et un temps de retardement est prévu, afin de prendre en considération le temps de déplacement du mélange de fibres, depuis les moyens de mesure (222) jusqu'à un point de mise en action de la régulation,
    caractérisé par le fait que,
    pour le changement de paramètres déterminés de régulation, la vitesse de livraison (LG) du mélange de fibres (7) et/ou la comparaison entre le déroulement de masse mesuré de la matière fibreuse (F1) délivrée par l'unité de train d'étirage avec un déroulement de masse de consigne prédéterminé (consigne) est utilisée.
  2. Procédé selon revendication 1,
    caractérisé par le fait que
    le positionnement (L) du point de mise en action (R) de la régulation, par rapport au membre de mesure (7), est corrigé en fonction de la vitesse de livraison (LG) du mélange de fibres (7).
  3. Procédé selon revendication 2,
    caractérisé par le fait que
    le facteur de correction pour le changement du positionnement du point de mise en action (R) de la régulation est extrait à l'aide d'une courbe (40,S,S1-S3) prédéfinie de la commande (20,51).
  4. Procédé selon revendication 3,
    caractérisé par le fait que
    la courbe (40,S,S1-S3) est déposée dans une commande (51) d'une machine (50) disposée en amont du train d'étirage (60,1), laquelle transmet le mélange de fibres (F) formée dans celle-ci au train d'étirage (60,1).
  5. Procédé selon l'une des revendications 2 à 4,
    caractérisé par le fait que
    la distance (L) comprise entre le point de mise en action (R) de la régulation et le membre de mesure (7) est réduite, lorsque la vitesse de livraison (LG) augmente.
  6. Procédé selon l'une des revendications 3 à 5,
    caractérisé par le fait que
    plusieurs courbes (S1-S3) pouvant être présélectionnées sont déposées dans la commande (20,51) en correspondance avec des matières fibreuses différentes.
  7. Procédé selon l'une des revendications précédentes 2 à 6,
    caractérisé par le fait que
    le changement de positionnement (L) du point de mise en action (R) de la régulation n'est réalisé que lorsque la vitesse de livraison (LG) du mélange de fibres (F) quitte une limite de tolérance (TG) déterminée à l'avance.
  8. Procédé selon revendication 1,
    caractérisé par le fait que,
    lors de la comparaison entre le déroulement de masse mesuré de la matière fibreuse (F1) délivrée par l'unité de train d'étirage, avec un déroulement de masse de consigne prédéterminé (consigne), les écarts (a,b) dépassant une valeur de tolérance sont pris en considération pour le changement des paramètres de régulation (A).
  9. Procédé selon revendication 8,
    caractérisé par le fait que
    le déroulement de masse est représenté sous forme d'un spectrogramme (67) qui est comparé avec un spectrogramme normal (66) prédéfini de l'unité de commande (SE).
  10. Procédé selon revendication 9,
    caractérisé par le fait que
    les écarts de spectrogramme sont pris en considération dans la zone de longueurs de période comprise entre 5 et 150 cm.
  11. Procédé selon revendication 8,
    caractérisé par le fait que
    le déroulement de masse est représenté comme valeur moyenne (MU,MO) qui est comparée avec une valeur moyenne de consigne (MW) déterminée à l'avance.
  12. Procédé selon l'une des revendications 8 à 11,
    caractérisé par le fait que,
    pour la mise au point des paramètres de régulation, la masse fibreuse (F) amenée vers l'unité de train d'étirage (1) est variée par intervalle de mesure (T1).
  13. Procédé selon revendication 9 ou 10,
    caractérisé par le fait que,
    en plus, le coefficient de variation (valeur CV) du déroulement de masse de consigne déterminé à l'avance est comparé avec la valeur CV de la masse instantanée mesurée, et est pris en considération pour la mise au point des paramètres de régulation.
  14. Procédé selon revendication 13,
    caractérisé par le fait que
    la valeur CV de longueur est utilisée avec des sections de longueur comprises entre 20 cm et 3 m.
  15. Procédé selon l'une des revendications 8 à 14,
    caractérisé par le fait que,
    pour la correction de l'écart de masse, le point de mise en action (R) de la régulation est déplacé.
  16. Procédé selon l'une des revendications 1 à 15,
    caractérisé par le fait que
    le mélange de fibres (F) est délivré depuis une carde (50) vers l'unité de train d'étirage (1).
  17. Procédé selon revendication 16,
    caractérisé par le fait que,
    pendant l'accélération de la carde (50), une période d'échauffement est réglée, pendant laquelle certaines surveillances de la commande (SE) sont mises hors service.
  18. Procédé selon revendication 17,
    caractérisé par le fait que
    la période d'échauffement est surveillée par des détecteurs de température (60).
  19. Procédé selon revendication 18,
    caractérisé par le fait que
    la période d'échauffement est déterminée dans le temps.
  20. Dispositif utilisé pour commander l'étirage d'un mélange de fibres (F), (par exemple, un ruban de fibres) qui est délivré depuis une machine textile (50) vers une unité de train d'étirage (1) faisant suite, et où, des
    moyens (222) sont prévus pour enregistrer les variations de masse du mélange de fibres (F) amené vers l'unité de train d'étirage (1), et l'unité de train d'étirage est au moins pourvue d'une zone d'étirage variable (HV) égalisant les variations de masse, dont la grandeur d'étirage est commandée via une unité de commande (SE), à l'aide des variations de masse détectées, en comparaison avec une valeur de consigne (consigne) définie à l'avance, et à l'aide du temps de retardement compris entre le lieu de mesure (222) et un point de mise en action (R) de la régulation,
    caractérisé par le fait que
    des moyens (20,51,40) sont prévus à l'aide desquels le positionnement (L) du point de mise en action (R) de la régulation, par rapport au membre de mesure (7), est déterminé à l'aide de la vitesse de livraison (LG) du mélange de fibres (F).
  21. Dispositif selon revendication 20,
    caractérisé par le fait que
    les moyens consistent en un appareil de commande (20,51), particulièrement en un micro-ordinateur, lequel, à l'aide de dates (40) déposées et mémorisées dans l'appareil de commande (20,51), et en liaison avec des signaux qui sont transmis depuis un membre de mesure (12,53), servant à déterminer la vitesse de livraison (LG) de la matière fibreuse (F), vers l'appareil de commande, provoque le déclenchement de la variation d'étirage.
  22. Dispositif selon l'une des revendications 20 à 21,
    caractérisé par le fait que
    la matière fibreuse (F) est délivrée depuis une carde (50) vers une unité de train d'étirage (60,1) lui faisant suite, et l'unité de commande (51) de la carde (50) est pourvue de moyens (40), afin de transmettre un signal de correction pour la détermination du positionnement (L) du point de mise en action (R) de la régulation du train d'étirage (1) lui faisant suite, vers la commande (20) du train d'étirage, pour le déclenchement de la variation d'étirage.
  23. Dispositif utilisé pour commander l'étirage d'un mélange de fibres (F), (par exemple, un ruban de fibres) qui est délivré depuis une machine textile (50) vers une unité de train d'étirage (1) faisant suite, et où, des moyens (222) sont prévus pour enregistrer les variations de masse du mélange de fibres (F) amené vers l'unité de train d'étirage (1), et l'unité de train d'étirage est au moins pourvue d'une zone d'étirage variable (HV) égalisant les variations de masse, dont la grandeur d'étirage est commandée via une unité de commande (SE), à l'aide des variations de masse détectées, en comparaison avec une valeur de consigne (consigne) définie à l'avancé, et à l'aide du temps de retardement compris entre le lieu de mesure (222) et un point de mise en action (R) de la régulation,
    caractérisé par le fait que
    qu'au moins un moyen supplémentaire (28) est prévu, afin d'enregistrer le déroulement de masse de la matière fibreuse (F1) délivrée depuis l'unité de train d'étirage (1), et les signaux du moyen sont délivrés vers l'unité de commande (S) laquelle, à l'aide d'une valeur de consigne (consigne, M) définie à l'avance, détermine les écarts et produit des signaux de commande correspondant aux écarts, afin de changer des paramètres déterminés de régulation.
  24. Dispositif selon revendication 23,
    caractérisé par le fait que la machine textile est une carde (50).
  25. Dispositif selon l'une des revendications 23 à 24,
    caractérisé par le fait que,
    pour la mise au point des paramètres de régulation, la quantité de la masse de fibres (F) délivrée est variée par la carde (50), pour des périodes de mesure (T1) différentes.
  26. Dispositif selon revendication 25,
    caractérisé par le fait que
    le nombre de tours du rouleau alimentaire (70) délivrant vers la carde (50) est constant, et le nombre de tours du rouleau peigneur (112) est varié via l'unité de commande (SE).
  27. Dispositif selon revendication 25,
    caractérisé par le fait que
    le nombre de tours du rouleau alimentaire (70) délivrant vers la carde (50) est varié via l'unité de commande, et le nombre de tours du rouleau peigneur (112) est maintenu constant.
  28. Dispositif selon l'une des revendications 26 à 27,
    caractérisé par le fait qu'un membre temporisateur est prévu, afin de prendre en considération le temps de retardement compris entre le démarrage de la quantité délivrée changée et le moment où la quantité délivrée changée est traitée dans l'unité de train d'étirage (1).
  29. Dispositif selon l'une des revendications 22 à 28,
    caractérisé par le fait que,
    pendant l'accélération de la carde (50), une fonction d'échauffement pour la machine est déclenchée dans l'unité de commande (SE) qui met hors service certains moyens destinés à la surveillance et/ou la régulation.
  30. Dispositif selon revendication 29,
    caractérisé par le fait que
    des moyens sont prévus pour surveiller la période d'échauffement, via lesquels l'exécution pour la mise en action des paramètres de régulation est libérée.
  31. Dispositif selon l'une des revendications 29 à 30,
    caractérisé par le fait que
    les moyens sont des détecteurs de température (59) qui sont disposés dans la carde (50) et/ou dans l'unité de train d'étirage (1).
EP99924633A 1998-06-12 1999-06-11 Banc d'etirage de regulation Revoked EP1086264B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CH127798 1998-06-12
CH127798 1998-06-12
CH250798 1998-12-18
CH250798 1998-12-18
PCT/CH1999/000255 WO1999066113A1 (fr) 1998-06-12 1999-06-11 Banc d'etirage de regulation

Publications (2)

Publication Number Publication Date
EP1086264A1 EP1086264A1 (fr) 2001-03-28
EP1086264B1 true EP1086264B1 (fr) 2002-10-30

Family

ID=25687187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99924633A Revoked EP1086264B1 (fr) 1998-06-12 1999-06-11 Banc d'etirage de regulation

Country Status (6)

Country Link
US (1) US6499194B1 (fr)
EP (1) EP1086264B1 (fr)
AU (1) AU4127999A (fr)
DE (1) DE59903261D1 (fr)
ES (1) ES2187162T3 (fr)
WO (1) WO1999066113A1 (fr)

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Publication number Publication date
AU4127999A (en) 2000-01-05
WO1999066113A1 (fr) 1999-12-23
EP1086264A1 (fr) 2001-03-28
US6499194B1 (en) 2002-12-31
ES2187162T3 (es) 2003-05-16
DE59903261D1 (de) 2002-12-05

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