CN1469945A - Method for operating drawing equipment and drawing equipment - Google Patents
Method for operating drawing equipment and drawing equipment Download PDFInfo
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- CN1469945A CN1469945A CNA018174256A CN01817425A CN1469945A CN 1469945 A CN1469945 A CN 1469945A CN A018174256 A CNA018174256 A CN A018174256A CN 01817425 A CN01817425 A CN 01817425A CN 1469945 A CN1469945 A CN 1469945A
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- Prior art keywords
- drafting
- roller
- drafting system
- fiber web
- force
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
- D01H13/22—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to presence of irregularities in running material
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
- D01H1/20—Driving or stopping arrangements
- D01H1/22—Driving or stopping arrangements for rollers of drafting machines; Roller speed control
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The invention relates to different possibilities existing in textile drawing equipment for measuring and evaluating, or influencing the drawing forces occuring inside a fibre non-woven fabric when drawing is performed. The invention also relates to various possibilities for optimising the parameters of drawing equipment by using the results obtained from measuring the drawing force, such as adjustment of the pressure of the pressure roller, the positioning of a pressure bar in a drawing area and adaptation of a point where the control is to be applied.
Description
The present invention relates to be used to drive the method for drafting system.The present invention relates to corresponding drafting system equally.
The core of drawing frame (Strecke) is a drafting system.One or more textile fabric bars are positioned on the drafting system with fibroreticulate form, and this fiber web subsequently can be drafted in drafting system.In drafting process, fiber web can stretch at least one draw zone of drafting system, and this fiber web forms last ribbon heavily again after leaving last draw zone.The height of drawing-off will adapt with the material of ribbon, and wherein to pull sample length (Stapell nge) be an important material parameter to fiber.
To constituting, they are arranged in together drafting system one by one, have formed draw zone by a series of rollers.Common drafting system generally has a front draft zone and a main drawing area.For not regulating drawing frame, front draft and dominant draft all are constant in drafting process.For regulating drawing frame, then can regulate by the change of drawing-off height.In drafting system, can both exert one's influence to front draft and dominant draft, but almost always dominant draft be exerted one's influence.Because dominant draft is big than front draft, thereby can regulate more accurately.
No matter be not regulate drawing frame or adjusting drawing frame, all need to obtain the information of the fibroreticulate drawing-off quality of relevant drawing-off.In regulating drawing frame, measure by fiber capacity usually continuous process, realize the adjusting that counter extensioin changes.Mostly this measurement is to finish in modes such as continuous machinery, optics, air pressure.If the input area at drafting system is provided with measurement mechanism, just be referred to as control, on the contrary,, be to regulate if measurement mechanism is housed at output area.And both of these case all can be referred to as adjusting.It also is very common that control and adjusting are used simultaneously.
The measurement mechanism that often is used in the drafting system input area is made of a pair of detection wheel, and this is not fixed to surveying wheel, can produce deflection more or less with the number change of the ribbon that enters.This deflection can be converted into voltage value by signal adapter, and is transferred on the adjusting processor, and the latter can provide standard value for the drive unit that links to each other with one or more rollers.Because the fiber web that is installed in the measurement mechanism has passed through a segment distance between measurement point and drawing point, so during this period of time signal must be retained in the holder.The measurement that output area carries out also can be determined the fiber capacity passed through.At this known device especially capacitance measuring device, its utilization be the high-k of the current that together are introduced into fiber web.
Not regulating drawing frame then adopts following method to come the fibroreticulate quality of counter extensioin to detect: the independent section fibre that takes off from fiber web of weighing for example.If nonconforming drawing-off is arranged, then relevant parameters changes on the counter extensioin device, such as roller to distance and/or the velocity of rotation of single roller.
Because can only generally provide some information about the parameter of fiber web that will drawing-off and drafting process to the measurement of the capacity of the ribbon that passes through in limited range, thereby the method for drafting force between the various fiber that is used to measure on will the fiber web of drawing-off has appearred.(northern Lay is because of the research report in Westfalen state for a literary composition for " the VergleichendeUntersuchungen an Me β vorrichtungen zur fortlaufenden Ermittlung derMaterialungleichm β igkeit " that writes such as DE1 141212 and by W.Wegener and H.Bechlenberg, No. 2097, West Germany publishing house, Cologne and OPRAH are stepped on) disclose at draw zone in 1970 the method that depression bar deflects ribbon has been set, and support depression bar in the both sides by two sheet springs.By the drafting force that produces at draw zone, depression bar can slightly, vertically be transferred on the ribbon, and in this course, the sheet spring that links to each other with depression bar in the both sides can produce low-angle bending.Therewith correspondingly, be positioned at resistance strain gage on the sheet spring of compensating circuit because of being subjected to the flecition of spring, can have a resistance changes and voltage and current changes.This measurement pulse can also be enhanced and be illustrated subsequently.And the method for employing depression bar identical with it on a kind of principle is also disclosed among DE 199 06 139 A1.
In addition, DE 1 062 587 disclose with result from two rollers between drafting force the supporting arm that pivots around run-on point is deflected slightly.Lever end at supporting arm is equipped with a pair of roller that is positioned at the downstream, and in the process that ribbon at the uniform velocity shifts out, the roller by other a pair of back can deflect under the effect of corresponding bigger drafting force to roller for this.The deflection that supporting arm took place can be measured by the measured value current transformer subsequently.
DE1 062 587 disclosed methods are, with a steamboat that ribbon is deflected measure roller to the size of drafting force component, the two ends of steamboat are arranged in spheroid, are supported by crank levers and corresponding support respectively in both sides.The deflection meeting that steamboat produces changes voltage change into.
FR1 324 756 discloses the variation of fiber number fluctuation in short time and even drafting force, thus the roller (perhaps other a pair of roller) that makes the input along or be pushed against the moving direction of ribbon.Because variation has taken place in the right position of roller, so the drawing-off meeting alleviates or strengthens.Send roller to being supported on two spring levers.The variation of drafting force can make the position of sending roller that small variation takes place.Adopt the measurement mechanism of inductance or capacitive way this change records can be got off.Subsequently, measuring-signal can be used to change the width of draw zone as described above.
Task of the present invention is to provide a kind of method or device of measuring drafting force and/or optimizing drawing-off.
Independent claims 1,2,3,4,5,12,13 and 14 feature have realized the method that this task will provide.Demand for independence 16,17,18 and 23 feature have realized the device that this task will provide.
Should understand " direct and/or indirect " in the present invention like this, can be used as drafting force to other amount and measure, go out the size of drafting force by this measurement result deducibility.
Advantage of the present invention especially is, for the adjusting of optimizing drafting system provides different new method and new equipments.In addition, also introduced the new method of measuring drafting force, in some cases, the fibroreticulate capacity that can pass through with these method measurements.To the measurement of fibre-fibre friction on the fiber web is that direct or indirect measurement by counter extensioin power realizes.Fiber on the fiber web is in conjunction with tight more, and the fibre frictoin between them is big more, and the drafting force of generation is also big more.The measurement result of drafting force can be used to infer quality of fiber and the layout on the fiber web, and the parameter of drafting system is adapted with it.In the method, can time interval measurement drafting force once, continuously or in accordance with regulations or random.
For example, can determine according to the drafting force of measuring, be that the less relatively parallel fibers that rubs is in the majority on will the ribbon of drawing-off, and the fiber that is still intersecting is in the majority, under latter event, because adjacent fibre twines mutually, certainly leads to bigger power.Adopt this method, can also measure repiece (Anleger),, and under the situation of the entanglement tension or the pine of tangling, its fiber web from drawing-off is removed promptly by the connection between manual two continuous feeding ribbons that produce.In addition, can also infer the length of fiber by the drafting force of measuring.
The method that the present invention is used to measure drafting force is characterised in that the top roller that the upstream roller is right for example is positioned at the right top roller of middle roller of main drawing area, but is that deflection is installed, and the bottom roll of subordinate is hard-wired in measuring process.At this moment, top roller also can suitably move on the circular section of doing to rotate with one heart around the bottom roll periphery.When being subjected to than high draft power, top roller can move at downstream direction, and the highway section that wherein has the displacement measurement element can be changed the voltage signal variation into by known mode.The feature of the drafting force that this works just.
The data that counter extensioin power measures are except being used to regulate the width of draw zone (n), and according to the present invention, it can also be used to regulate other drafting system parameter.At first to set forth an example of regulating the draw zone width: compare too greatly as the average length of fruit fiber with the distance of drafting system roller, the frequent jaw line on the fiber usually can between two relevant rollers, occur.The so just drawing-off that can't realize ideal is ruptured because the speed of the fiber that is pressed from both sides meeting Yin Luola running is different.Acting on accordingly also can be bigger by the drafting force on the folder fiber.If record so bigger drafting force, just point out us to expect, should strengthen two rollers to distance.But do not need all to measure exactly in all cases the size of drafting force.As long as exceeded the certain limiting value of drafting force,, thereby inappropriate draw zone width is made adjusting just we can make estimation.In some cases, if drafting force still exceeds its limiting value after each new adjusting, the right distance of roller might progressively increase on interim ground automatically.After drafting force drops to below the limiting value, just reached the distance between correct roller.
Based on measured value and/or corrected value, the present invention especially has the following advantages, can and/or proofread and correct the result according to measurement result, regulate better velocity of rotation, the top roller of roller contact pressure and hardness, be positioned at the sprawling and/or the position of depression bar in draw zone of ribbon in drafting system the place ahead.Under the situation of using depression bar, it also can advantageously serve as the drafting force measuring cell.
After operating personnel obtain corresponding prompting according to the drafting force of measuring, just can depression bar reasonably be arranged in the draw zone by mode at level and/or the enterprising pedestrian's wage adjustment joint of vertical direction.
Following situation may occur in another example, the drafting force of promptly measuring is compared too little with the empirical value of measuring under the fiber quality situation identical with the roller position usually, and drawing-off is wrong, and its reason may be that the contact pressure of top roller is too little.At this moment can increase contact pressure by corresponding the adjusting with artificial or automated manner.Self-regulating mode can be judged in the shortest time, and whether problem really goes out on the contact pressure of roller.Do not change to some extent because if the drafting force measuring appliance is measured drafting force, just say something not on roller, roller pressure also can automatically be regulated back initial value, and changes another one drafting system parameter with artificial or automated manner, so that find root-cause.In this way, can in a full automatic drafting system, find and overcome problem soon.
Fibroreticulate stretching, extension also can be changed according to the measurement result of drafting force in the drafting system.The guide rod that is positioned at just before the drafting system inlet that for example is shaped by correspondence, particularly intersecting to the fiber web bending can make fiber web stretching, extension De Gengkai, thereby fiber is diminished with interfibrous the contact.This effect that produces when measuring less drafting force is best.
The particularly advantageous advantage of the present invention is, is used for regulating the control of the adjusting starting point in the draft of drawing frame district with measured value and by the corrected value that it obtains.Because big on the ribbon more less of the necessary drafting force on the bigger ribbon of cross section than cross section, the position of drawing-off in the therefore time ratio latter evening of the former fiber generation drawing-off, and generation is also more right near the drafting system roller in downstream than ribbon described later.Therefore, should correspondingly change the adjusting starting point according to the measurement result of drafting force, this point is the moment standard that changes the roller velocity of rotation, and the velocity of rotation that changes roller is in order to regulate the inhomogeneities of ribbon.For example for the bigger reason of thickness, the drafting force of measuring is bigger than normal, just should be in advance will regulate the starting point reach, so that the less ribbon of bigger ribbon of cross section and cross section on the same position in drawing-off zone drawing-off takes place.
Drafting force is measured in front draft zone at drafting system, changes the adjusting time at main drawing area according to measurement result, also is desirable especially.So just, provide time enough to come calculate draft force measurement value for faster processing mode and introduced regulon, thereby can be subjected to regulate, adjust the right rotating speed of middle roller in the drawing-off of transmission speed constant (rotating speed of promptly sending roller is constant), make it and be positioned at by middle and to send roller suitable to the adjusting starting point of the main drawing area that constitutes.
In a kind of particularly advantageous embodiment of the present invention, the power that can be directly be subjected on two rollers by drafting system measuring instrument that the chien shih fiber web is deflected is measured drafting force.Be suitable for using depression bar in this case, it is positioned in main drawing area usually, just in the middle of roller to and send roller between.This depression bar generally is positioned at the main drawing area upper area, and the width that exceeds main drawing area contacts with fiber web, between two jaw lines of main drawing area fiber web is deflected.By fibroreticulate deflection, depression bar can obtain with relevant two rollers to the perpendicular component of contact plane between last jaw line.
Can adopt various method measurement to act on power on the depression bar, this power also is to measure the yardstick of the drafting force on the fiber web of main drawing area.For example adopt resistance strain gage, it can produce reaction to the bending with contacted that section depression bar generation of fiber web, sends simultaneously and the proportional signal of the component of drafting force.In this course, the curved bar principle is particularly suitable.Be about to be arranged in the draw zone as the bent stick and the drawing-off direction of a depression bar part with intersecting, and its part as measuring appliance.Forces are applied as if depression bar, will produce bending, thus elongation or curling.In this case, for example can adopt and allow elongation or curl and especially appear at positive installation method depression bar.These fronts or side can be received by one or more resistance strain gages, and these resistance strain gages can be adhered on the side, and will extend or the curling signal of telecommunication that changes into.Resistance strain gage preferably is set like this, and promptly the active force perpendicular to draw zone that depression bar is produced makes elongation or the distortion maximum that resistance strain gage takes place.
In another optional embodiment, be the displacement measurement element with DESIGNING COMPRESSION RODS, it departs from the equilbrium position under the effect of fiber web drafting force.The size of deflection can be converted into the signal of telecommunication, and this signal is proportional with the pulling force that acts on depression bar.Beneficially, like this depression bar is arranged on draw zone, to measure component perpendicular to the joint face between the right jaw line of the two pairs of relevant rollers.At this moment, depression bar also is vertically set on this joint face correspondingly movably.
(or additionally) in addition, can also be according to acting on torque or its variation that the drafting force on the roller is measured drafting system.Known torque is relevant with the drafting force on acting on radius, and this drafting force is to be measured by the relevant pivot axis of roller at stressed place.The method of this measurement torque thereby a kind of mode of indirect measurement drafting force also is provided.And, can use the instrument of those known measurement torques fully in order to measure torque and to estimate its size.If axle is by the torque carrying, just distortion tension force can cause the drawing-off of going up the plane.When becoming miter angle with axis, the drawing-off maximum of appearance when therefore being in this angle, preferably adopts resistance strain gage to measure.Such as on the outer wall of one or more rollers, respectively being stained with four resistance strain gages, when producing distortion tension force, two meeting elongations wherein, two other can twist.Consequent resistance variations can suitably be converted into and the proportional voltage of torque by measuring bridge.If the revolution of roller is also measured, can also draw size that send by axle and torque product and the proportional mechanical output of revolution.The measurement sensing element of other the torque that also can be used is an inductance type, or adopts the magnetoelasticity principle.
Say in principle, can measure the commentaries on classics distance of one or more drafting system rollers.Statistics is represented, under many circumstances, as long as a roller is measured, just can determine a certain limiting value that whether has surpassed torque and drafting force.If can measure the torque consumption of roller of the both sides of fiber web generation drawing-off simultaneously, just can realize more accurate measurement.If the most accurate information will be provided, just must on the drawing frame that has front draft zone and main drawing area, measure all driven rollers or the moment of the roller that together gets into smooth because of friction.
(perhaps additionally) in addition, can measure drafting force indirectly by the power of electric motor absorber, it can be used to drive at least one drafting system roller, or this driving is exerted an influence.Nearly all power measurement instruments commonly used all is applicable to this point, such as multiplier.Keep constant for transporting velocity, and send roller, can measure and drive the power of electric motor of sending roller also with the drafting system of constant rotational speed running.Thus, the size of drafting force can be estimated at least, situation about surpassing can be determined simultaneously based on the limiting value of former empirical value by empirical value.In addition or additionally, can also measure the power of electric motor consumption of roller in the middle of driving.And select to measure the consumption of which power of electric motor, depend on the bigger of front draft zone and main drawing area apart from which.If the latter's distance is bigger, so long fiber will be clamped from the both sides in the front draft zone, thereby correspondingly makes the power of electric motor consumption that drives middle roller become big, is more suitable in measurement.
If send roller and middle roller is driven by same motor, also can measure this power of electric motor consumption.
In some existing adjusting drawing frames, main motor is used to drive on the one hand sends roller, is connected with an epicyclic gearing effect to middle roller generation effect on the other hand.This epicyclic gearing can receive the control revolution of servodrive, and this servodrive can be regulated processor acquisition standard value from one.This standard value is to be formed by the value of electrical signals that the transfer rate of a pair of detection wheel that is arranged on the porch and drawing frame produces.By power as the standard that acts on the drafting force on the fiber web, can determine the power consumption of main motor and/or servodrive.As mentioned above, drafting force can exert an influence by counter extensioin device roller, and these rollers self can be passed to main motor with torque, and they also pass to servodrive and main motor by epicyclic gearing with torque simultaneously, thereby utilize known physical relation to obtain the size of drafting force.
In another embodiment of the invention, the total power that acts on the driving belt is measured, wherein driving belt is designed to power is delivered at least one drafting system roller from a drive motor.Under the situation of the power of considering to be produced by motor, especially drafting force on the fiber web produces by acting in the fluctuation of institute's dynamometry.
No matter be the torque consumption that utilizes at least one drafting system roller, still utilize the power consumption at least one roller supporting position, or drive or influence the power of electric motor consumption of at least one drafting system roller, measure the drafting force in the drafting system, according to the present invention, all be by having in the counter extensioin device and driving torque when not having fiber web compares and calculates drafting force.This way is suitable, because the pressure roller can start back heating and deliquescing.Therefore just cause torque to change.
In the preferred further structure of the present invention, can calculate measured value by a computing unit, and draw corrected value.By this computing unit especially advantageously, can be in the hope of median on the fiber web and changing value.Measured value and/or corrected value can for example be presented at mechanically, and perhaps transmission is displayed on the distance controller far away by data.By the correction data that illustrate, can change by artificially counter extensioin device parameter.When resetting one or more parameter, also can directly consider measured value, also can under the situation of the measured value of considering to obtain, quote empirical value by form.
Measurement result and/or corrected value also can only adopt the form that is/denys to illustrate, and are lower than or have exceeded a certain limiting value (maximum and/or minimum of a value) such as only illustrating.The simplest way is exactly to adopt the signal of acoustics and/or optics in this case.
According to the present invention, the measured value of drafting force and/or the corrected value of being released by it are stored in the electron storage device, so that can therefrom obtain the information about the fiber net quality of producing later on.Relevant fibroreticulate data can have suggested to the feature (fecundity of yarn etc.) by the yarn of fiber web output.In addition, also can infer drawing frame and/or processed feeding ribbon and fibroreticulate state of arts thus.
Generally speaking, the method for this measurement drafting force can be used as the alternative arrangement or the additional aspects of known control method and device.The requirement of counter extensioin is accurate more, and conventional is also just more useful naturally with control method of the present invention.
Above-described off line and/or the online adjusting of carrying out according to drafting force measured value counter extensioin device, can finish by measurement result, and this measurement result to be corresponding measuring appliance by the drafting system exit provide, for example RSB-D30 goes up the Rieter Quality Monitor that is provided with.It provides a googol according to the storehouse, reasonably utilizes this database, just can realize online very accurately adjusting.In addition or additionally, the utilization of database data also for the operator suggestion how off line realizes rationally regulating the drafting system parameter has been proposed.
Under the situation that the fiber characteristics value changes significantly, be particularly suited for rationally regulating by counter extensioin device parameter of the present invention.These characteristic values for example are the fibre weight in the rotation of fibre length, length uniformity (fiber pulls sample length), fibrous ribbon, fibre fineness, staple fibre composition, the cross section, situation arranged evenly or parallel distribution, fibroreticulate shape of cross section and tightness, fiber adhesiveness, hetero fibre composition and/or the fiber humidity of fiber.
In the process of blended fiber generation drawing-off, be particularly suited for adopting the present invention.For example it can monitor the mixing situation of fiber, and identifies the fibrous mass that produces under certain drawing-off distance.To ribbon that mix or non-mixing all particularly suitable be to infer and calculate fibroreticulate CV-value by the measured value of drafting force.
Another aspect of the present invention is exactly to have introduced at least a liquid to change fibre-fibre friction on the fiber web in draw zone.For this reason, can use the introducing method of injection, for example adopt an injection apparatus that is positioned at relevant draw zone top, make one or more nozzles point to the fiber web that drawing-off will take place.In this course, should adopt method existing or of the present invention, measure continuously or according to certain hour interval counter extensioin power, so that can observe the influence that the liquid of introducing produces, and in course of injection, implement corresponding change (duration of fluid flow, expulsion pressure, injection, the liquid area distributions on fiber web etc.).
Under the excessive situation of fibre frictoin, be particularly suited for adopting (at preceding and/or main drawing area) adding air wetting agent in draw zone, to reduce fibre-fibre friction.For example can adopt the vaporous water of q.s with the form of drop, as water vapour.In another embodiment of the invention, can advantageously in draw zone, introduce an oil/water base wetting agent, it can reduce interfibrous mutual adhesion, and drawing-off is more prone to.
As a kind of alternative arrangement or additional aspects, can be on fiber web, adding liquid before the drafting system, to reduce interfibrous friction.
In addition or additionally, can spray the fiber web that had extended at the exit of drafting system water or water vapour, because institute's water consumption is little, interfibrous friction can increase, thereby make enough fiber webs combine, can enter flyer spindle formula roving frame in the clear.Perhaps, also can use other suitable liquid to come friction between increased fiber.
The feature that is characterized as dependent claims of the further structure that the present invention is favourable.
With reference to the accompanying drawings embodiments of the invention are explained in detail.Wherein:
Fig. 1 is the schematic diagram of the main element of an existing drafting system;
Fig. 2 is the schematic diagram that Fig. 1 has the drafting system of additional torque absorber;
Fig. 3 is the schematic diagram that Fig. 1 has the drafting system of additional motor-power absorption device;
Fig. 4 is the middle roller of the drafting system that top roller has the pivot supporting member in the middle of it and the diagrammatic side view of sending roller;
Fig. 5 is the diagrammatic side view that has the roller on the drafting system of 4 top rollers, 3 bottom rolls and a depression bar;
Fig. 6 is the diagrammatic side view of roller that has the drafting system of injection apparatus.
Fig. 1 has schematically shown an existing drafting system that has the drawing frame of electronic regulating system.The main element of drafting system 1 is that three rollers are right, only shows top roller in Fig. 1 vertical view, promptly go up feeding roller 2, go up in the middle of roller 3 and on send roller 4.Between feeding roller 2,5 and middle roller 3,6, formed front draft zone 10, and at middle roller 3,6 with send between the roller 4,7 and formed main drawing area 11.
In addition, after downstream drafting system outlet is in toison funnel 16, be provided with delivery roller to 15, its by corresponding transfer path with drawing-off fiber web FV deliver to (not shown) in the bar tube.In addition, also can send roller to and delivery roller a unshowned conducting bar roller is set between to 15.
Be equipped with one in the porch of drafting system 1 and survey wheel to 14, it is right that it is designed to the trenching measuring wheel at this.A funnel 13 is housed before to 14 surveying wheel, it can make to enter into and survey wheel 14 feeding ribbon VB is flocked together.In the example shown, have 6 feeding ribbon VB arranged side by side be transported to funnel 13, and thickening is therein sent 14 through surveying wheel again.No longer will be positioned at this moment survey wheel to 14 downstreams be called the feeding ribbon, and replace being called tight fibers net FV.
For the ease of understanding, in Fig. 1 to 3, express electrical connection between the discrete component with the line of band filled arrows, mechanical connection then is to adopt to be with the line of hollow arrow to represent.
Two of surveying in the wheel 14 are movable the installations, and continuous ribbon deflects the detection wheel according to its variation of quantity, and degree of deflection is decided according to the change size.This deflection is converted into voltage signal in signal adapter 34, and is sent to calculating and regulon 33.The task of this calculating and regulon 33 is, draw the correct standard value of servodrive 32 by the transporting velocity of the value of electrical signals of the feeding ribbon VB that enters and drawing frame, servodrive draws the control revolution of epicyclic gearing 31 again according to this standard value.Initial revolution by this in check epicyclic gearing 31 can drive by following feeding roller 5 and the drafting system feeding that roller 6 constitutes down.At this, main motor 30 has stipulated main revolution for epicyclic gearing 31.Main motor 30 also is used for driving down sends roller 7, so the output speed that the fiber web FV of output is maintained fixed.
Different with adjusting drawing frame shown in Figure 1, drawing frame shown in Figure 2 has the attachment device that can survey the drafting force of indirectly-acting on fiber web FV.In order to measure this value, must measure centre that is positioned at the above and below and the torque of sending roller 3,4,5,6.The data of measuring illustrate by measuring instrument 35,37, and measuring instrument for example can be made of the resistance strain gage that is bonded at the roller upper surface.The composite signal of change in resistance can be converted to and the proportional voltage of torque by measuring bridge 36,38 (signal adapter) respectively.
In the embodiment of Fig. 2, the signal of telecommunication of measuring bridge 36,38 is continued to be transferred to be calculated and regulon 33, and it can calculate this signal, and existing drawing frame as discussed previously equally draws standard value, and standard value is passed to servodrive 32.
In the unshowned a kind of modification of Fig. 2 drawing frame, selectively or additionally will on a display, illustrate through the torque of the roller of signal conversion, so that for example inform operating personnel, should on drafting system 1, take corresponding manual adjustment to change.These hardness, roller that change the contact pressure for example comprise top roller, top roller to distance and/or the position of the depression bar (not shown) in the draw zone.For example, this display can also play the warning effect of optics or acoustics.In addition, preferably this display is just started working when torque or the drafting force value of overstepping the extreme limit.
The method of this measurement drafting force also generally is applicable to does not regulate drafting system, obtains a rough supporting-point at least so that also need improved parameter to regulate by drafting system.The size of drafting force or exceed or situation about being lower than based on the limiting value of empirical value preferably illustrates with optics and/or acoustically can make the operator take manual adjustment like this, for example regulates the width of draw zone or the contact pressure of top roller.
In embodiments of the present invention shown in Figure 3, for main motor 30 and servodrive 32 respectively are provided with a power absorption device 40,42.They can measure the power that motor 30 or 32 must reach separately, to realize desired drawing-off.For example under the situation that fiber is adhered mutually, corresponding motor 30 or 32 must provide bigger power, and this power is measured by power absorption device 40,42, and proportional with the drafting force that will produce.Among the embodiment shown in the figure, can measure and show the measuring-signal of power absorption device 40 or 42.Thereby operating personnel are learnt, need the parameter of counter extensioin device to carry out manual adjustment, for example because new feeding and ribbon that will drawing-off have under the situation of fiber parameter of variation.
Certainly, also can only be that a drive motor is provided with the power absorption device.
In the optional or additional embodiment of Fig. 3, the signal mixing device of one or two power absorption device 40,42 can be set in calculating and regulon 33, this signal for example adapts with the width of the draw zone of front draft zone and/or main drawing area 10,11, thereby determine the right distance values of roller that makes new advances, and facilitate automatic adjusting.Perhaps, the mode of available optics or acoustics shows the low or too high power of relative mistake that absorbs, for example with the form or the signal by occurring when being below or above limiting value of concrete data.According to these data or signal, operating personnel just can be for example on the one hand by the form that concrete drafting force is shown, the counter extensioin device parameter is taked regulate to change, on the other hand can also the artificially to the level and/or the upright position change of the pressure or the depression bar in the draw zone of top roller.If will also can adopt said method equally utilizing a guide to change fiber web at feeding roller 2,5 with survey the stretching, extension situation of wheel between before the drafting system to 14.This can realize by guide compression or that fiber web is stretched.This guide is of the prior art, is set at before the drafting system usually.According to the present invention, have a guide at least and replaced, so that realize desirable fiber cross section geometry and even different drafting force characteristics by the different element of another profile.
Fig. 4 represents be have the drafting system of the fiber web FV of process from right to left middle roller to 3,6 with send roller to 4,7.At the depression bar 20 that an energy moving web FV is housed in to the draw zone of clamping 11 by roller.Roller is installed on the pivotal arm 61 pivotally to the top roller 3 of top in the middle of being positioned at, and this pivotal arm can rotate around a pivot axis D.Through the axis of bottom roll 6, like this, top roller just moves on the annular trace around bottom roll 6 pivot axis D in motion process.With lever 62 that pivotal arm 61 links to each other on a measurement mechanism 63 is housed, it for example is designed to have the existing detector for displacement measuring of resistance or voltage change converter, and for example based on principles such as condenser type, piezoelectric types.By this device, the drafting force that fiber web FV produces can make top roller 3 deflect on the arched planes, wherein, is provided with one and acts on the pivotal arm 61, overcomes drafting force operation and adjustable spring or tension spring for regulating the roller middle part.Also can adopt the regulating element of air pressure or hydraulic pressure.
Fig. 5 has described another and has measured the possible variant of drafting force.In this embodiment, the drafting system shown in the side view 1 has 2,3,4,8 and 3 bottom rolls 5,6,7 of 4 top rollers.Feeding roller to 2,5 and middle roller formed the front draft zone to 3,6, and middle roller is to 3,6 with send roller and formed main drawing area 11 to 4,7.Roller 8 is conducting bar rollers.Depression bar 20 is housed in the main drawing area 11, and this depression bar extends in the total draw zone width of main drawing area 11 basically, and is used to make the fiber web FV that moves from left to right in this embodiment to deflect.So, interfibrous friction just increases.Especially relatively short fiber is guided by depression bar 20, and " moves about " in small range.
Roller was to 3,6 with send roller and install two jaw lines of 4,7 are movable in the middle of depression bar 20 was substantially perpendicular to.The deflection of depression bar 20 is big more, and the drafting force on the fiber web FV is just big more, because at this moment the component of depression bar 20 on yawing moment is big especially.In the dynamometry process, depression bar 20 is used as detector for displacement measuring, and wherein the size of deflection is proportional with the power that acts on it.
In a kind of optional unshowned embodiment of the present invention, depression bar 20 is fixed and arranges and be provided with a plurality of resistance strain gages, and it is elongation in known manner or distortion under stressing conditions, and changes its resistance under these circumstances.This resistance Change Example can be inferred the size of drafting force as changing voltage signal into by means of a bridgt circuit by this signal.
Utilize depression bar 20 can infer that especially the humidity of fiber web FV changes.This is because the reinforced fiber parameter of material that will drawing-off is considered to remain unchanged.If under conditions of similarity, the drafting force of measuring has produced bigger fluctuation (for example measuring by torque or power absorption device), might illustrate, and the water capacity instability of feeding ribbon VB, and also the fibroreticulate correspondent section of drawing-off is of low quality.The present invention overcomes the weak point of feeding ribbon by these segment of fiber are removed from fiber web FV.
In the embodiment of drafting system shown in Figure 51, the signal that is produced by the depression bar 20 that is designed to the displacement measurement element is sent to signal adapter 21, and it can produce a correspondent voltage signal, and sends it to display 22.Operating personnel take corresponding variation according to the adjusting that shows information counter extensioin device, for example the position of depression bar 20 in main drawing area 11.This position changes may relate to the degree of depth that 2,5 or 3,7 distance and/or depression bar 20 is entered main drawing area 11 with respect to roller.Optional or additionally, voltage signal is further sent to be calculated and regulon, for example calculating and the regulon 33 that shows in Fig. 3 at Fig. 1.Perhaps, such calculating and regulon can also be set, that is, they do not influence roller speed, but adopt another kind of parameter to regulate on drafting system, for example change depression bar 20 position of 11 in main drawing area.
Optional or additionally, the measurement result of drafting force can be passed to and calculate and regulon 33, to change the adjusting starting point.
Shown in Fig. 6 is the side view of the corresponding drafting system 1 of drafting system among basic and Fig. 5.In addition, be provided with an injection apparatus 50, it is positioned at the top of main drawing area 11, under the situation of needs, can give fiber web FV spraying liquid F.This liquid for example can be water, can improve air humidity, thereby plays the effect that reduces fibre-fibre friction under the enough situation of amount of liquid.For example by calculating and the driving of regulon (not shown), this unit has the signal that shows excessive drafting force information to injection apparatus 50.Bigger drafting force means that interfibrous friction might be bigger, should be reduced by atomizing of liquids F.Certainly, also might be that other reason causes drafting force big (as the deflection that produces with the contacted element of fiber web FV among Fig. 5, perhaps with the equivalent of the power consumption of the torque of drafting system roller or drive motor).
Optional or additionally, can be before drafting system and/or afterwards, and/or an injection apparatus is set above the front draft zone.Be connected on the injection apparatus that is provided with after the drafting system and should want to make interfibrous friction after spraying small amount of moisture, to be increased, thereby guarantee that fiber web is sent to flyer roving frame (Flyer) safely.
The present invention can also be kept at the measurement data of above-mentioned various different measuring instruments in the holder, and comes the fluctuation of cognitive phase according to the data that are saved.
In addition, can identify defective repiece by the present invention, i.e. series connection in twos enters the home built joint of the feeding ribbon VB of drafting system.For example, they have the capacity identical with other ribbon section, but have diverse drawing-off feature.Particularly evident is, needs bigger drafting force, and fiber separation is come.Measure and illustrate this tangible growth if measure the measuring cell of drafting force, for example surpass prescribed limit values, can for example this repiece of shrinking hardly manually be removed, thereby improve the quality of drawn fiber net.
Claims (23)
1. method that is used to drive drafting system, this drafting system has one at least and is formed on two rollers to (2,5; 3,6; 4,7) draw zone that is used for drawn fiber net (FV) (10,11) between, roller is to by a top roller (2,3,4) and a bottom roll (5,6,7) constitute, the drafting force that wherein acts on fiber web (FV) is measured directly or indirectly, it is characterized in that, according to measured value, change the contact pressure of at least one top roller (2,3,4).
2. method that is used to drive drafting system, this drafting system has one at least and is formed on two rollers to (2,5; 3,6; 4,7) draw zone that is used for drawn fiber net (FV) (10,11) between, roller is to by a top roller (2,3,4) and a bottom roll (5,6,7) constitute, the drafting force that wherein acts on fiber web (FV) is measured directly or indirectly, it is characterized in that,, change the position of the depression bar (20) that is positioned at the drafting system draw zone according to measured value.
3. method that is used to drive drafting system, this drafting system has one at least and is formed on two rollers to (2,5; 3,6; 4,7) draw zone that is used for drawn fiber net (FV) (10,11) between, roller is to by a top roller (2,3,4) and a bottom roll (5,6,7) constitute, the drafting force that wherein acts on fiber web (FV) is measured directly or indirectly, it is characterized in that,, change drafting system fiber web before by guider and divide the comb degree according to measured value.
4. method that is used to drive drafting system, this drafting system has one at least and is formed on two rollers to (2,5; 3,6; 4,7) draw zone (10 that is used for drawn fiber net (FV) between, 11), particularly as described in one of above-mentioned claim, roller is to by a top roller (2,3,4) and a bottom roll (5,6,7) constitute, the drafting force that wherein acts on fiber web (FV) is measured directly or indirectly, it is characterized in that, the roller of upstream deflects with respect to the bottom roll that is fixed (6) to the top roller (3) of (3,6), and makes this displacement deflection amount change the measuring-signal of representing the drafting force size into.
5. one kind is used to drive the method for regulating drafting system, and this adjusting drafting system has one at least and is formed on two rollers to (2,5; 3,6; 4,7) draw zone that is used for drawn fiber net (FV) (10,11) between, roller is to by a top roller (2,3,4) and a bottom roll (5,6,7) constitute, the drafting force that wherein acts on fiber web (FV) is measured directly or indirectly, it is characterized in that,, change the adjusting starting point at least one draw zone according to measured value.
6. method as claimed in claim 5, wherein regulate drafting system and have a front draft zone and a main drawing area, it is characterized in that counter extensioin power is directly or indirectly measured in the front draft zone, change adjusting starting point in the main drawing area according to measured value again.
7. as the described method of one of above-mentioned claim, it is characterized in that, measure drafting force by power consumption, the especially depression bar (20) that make the measuring cell that fiber web (FV) deflects.
8. as the described method of one of above-mentioned claim, it is characterized in that drafting force is measured in the torque consumption of at least one the drafting system roller (5,6,7) by drafting system (1).
9. as one of above-mentioned claim described method, it is characterized in that, by driving at least one drafting system roller (5,6,7) or influencing this drive electric motor (30; 32) power consumption is measured drafting force.
10. as one of above-mentioned claim described method, it is characterized in that, measure the power that acts on the driving belt that drives at least one drafting system roller (5,6,7).
11. as the described method of one of above-mentioned claim, it is characterized in that, show measured value, the corrected value that obtains by measured value and/or the time graph of at least one parameter.
12. especially as one of above-mentioned claim described a kind of method that is used to drive spinning machine, the drafting force that wherein acts on the fiber web (FV) is measured directly or indirectly, it is characterized in that, the measured value of drafting force and/or be stored in the electron storage device by the corrected value that it draws, and to be taken as be the qualitative character of the ribbon produced.
13. method that is used for determining drafting force in the drafting system, this method is by at least one drafting system roller (5,6,7) torque consumption, act on the power consumption at least one roller supporting position and/or be used to drive at least one drafting system roller or influence this drive electric motor (30,32) power consumption is measured drafting force, wherein by this drafting force of torque calculation under the situation that has or not fiber web (FV) in the contrast drafting system.
14. control method of optimizing the fiber-fibre frictoin of fiber web (FV), especially with as the described method of one of above-mentioned claim combine, it is characterized in that, in order to change that fiber web (FV) is gone up interfibrous friction and in draw zone and/or before the draw zone and/or add a kind of liquid (F) afterwards, for example by spraying.
15. method as claimed in claim 14 is characterized in that, in fiber web (FV), add a kind of be used to reduce or increased fiber between the air wetting agent (F) that rubs.
16. one kind is particularly useful for implementing as one of above-mentioned claim to a method described drafting system, this drafting system has one at least and is formed on two rollers to (2,5; 3,6; 4,7) draw zone between (10,11), fiber web (FV) are sandwiched in therebetween and drawing-off take place, and also have to be used for measuring directly and/or indirectly the device (20 that acts on the drafting force on the fiber web (FV); 35,37; 40,42; 3,61,62,63), it is characterized in that this device (20; 35,37; 40,42; 3,61,62,63) comprise the top roller (3) of a roller to (3,6) upstream, this top roller (3) at bottom roll (6) but the hard-wired while installed by deflection ground, and the device (61,62,63) that the yaw displacement of top roller (3) is transformed into the signal that characterizes the drafting force size.
17. one kind is particularly useful for implementing as one of above-mentioned claim to a method described drafting system, this drafting system has at least one and is formed on two rollers to (2,5; 3,6; 4,7) draw zone between (10,11), fiber web (FV) are sandwiched in it and ask and drawing-off takes place, and also have to be used for measuring directly and/or indirectly the device (20 that acts on the drafting force on the fiber web (FV); 35,37; 40,42; 3,61,62,63), it is characterized in that having the device that changes the pressure of at least one top roller (2,3,4) according to measured value.
18. one kind is particularly useful for implementing as one of above-mentioned claim to a method described drafting system, this drafting system has at least one and is formed on two rollers to (2,5; 3,6; 4,7) draw zone between (10,11), fiber web (FV) are sandwiched in therebetween and drawing-off take place, and also have to be used for measuring directly and/or indirectly the device (20 that acts on the drafting force on the fiber web (FV); 35,37; 40,42; 3,61,62,63), it is characterized in that having the device that changes depression bar (20) position that is arranged in the drafting system draw zone according to measured value.
19. as one of above-mentioned device claim described drafting system, it is characterized in that, be used for measuring directly and/or indirectly the device (20 of drafting force; 35,37; 40,42; 3,61,62,63) comprise a depression bar (20) as the drafting force measuring cell.
20. as one of above-mentioned device claim described drafting system, it is characterized in that, be used for measuring directly and/or indirectly the device (20 of drafting force; 35,37; 40,42; 3,61,62,63) comprise that at least one is used to absorb the torque absorber (35,37) of the torque of at least one drafting system roller (5,6,7).
21. as one of above-mentioned device claim described drafting system, it is characterized in that, be used for measuring directly and/or indirectly the device (20 of drafting force; 35,37; 40,42; 3,61,62,63) comprise that at least one is used for absorbing driving at least one drafting system roller (5,6,7) or influencing this drive electric motor (30; The power absorption device (40,42) of power 32).
22., it is characterized in that having the device (20 that a basis is used to measure drafting force as one of above-mentioned device claim described drafting system; 35,37; 40,42; 3,61,62,63) measured value comes the computing unit (33) of calculated correction value, in particular for the variation of calculating mean value and standard deviation or the interior drafting force of fiber web (FV), and draws the CV value.
23. one kind especially as one of above-mentioned device claim described drafting system, it is characterized in that, have and be used to introduce the especially device of air wetting agent (60) of a kind of liquid (F), in draw zone, to change the fibre frictoin in the fiber web (FV), especially based on measured value and/or corrected value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10041434.6 | 2000-08-23 | ||
| DE10041434 | 2000-08-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1469945A true CN1469945A (en) | 2004-01-21 |
Family
ID=7653544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA018174256A Pending CN1469945A (en) | 2000-08-23 | 2001-08-18 | Method for operating drawing equipment and drawing equipment |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN1469945A (en) |
| AU (1) | AU2001295484A1 (en) |
| DE (1) | DE10140645B4 (en) |
| WO (1) | WO2002016683A2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126186B (en) * | 2007-04-11 | 2011-06-08 | 东华大学 | Traction device for on-line detecting drafting force of short fibre bundle |
| CN107407013A (en) * | 2015-02-13 | 2017-11-28 | 威实有限公司 | Method and apparatus for continuously measuring the bonding force in rove or similar fiber beam |
| CN112840068A (en) * | 2018-10-15 | 2021-05-25 | 特吕茨施勒有限及两合公司 | Method for regulating the pressure on a drawing frame |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10160123A1 (en) * | 2001-12-07 | 2003-06-26 | Zinser Textilmaschinen Gmbh | Apparatus for bundling a fiber composite comprises a condenser, behind the exit roller of a rolling mill, transverse to the direction of transportation and coordinated with an air-pressurizable air conditioner. |
| DE10307415A1 (en) * | 2002-02-20 | 2003-09-18 | Rieter Ingolstadt Spinnerei | Sliver drafting system, e.g. for drawframe, includes moving guide in drafting zone to improve levelling performance |
| DE10227676A1 (en) | 2002-06-20 | 2004-01-08 | Rieter Ingolstadt Spinnereimaschinenbau Ag | Method and device for evaluating signals from a sensor |
| CH696666A8 (en) | 2002-09-13 | 2007-11-15 | Truetzschler Gmbh & Co Kg | Device for doubling and distorting fiber ribbons. |
| DE10329835B4 (en) * | 2002-09-13 | 2012-05-31 | Trützschler GmbH & Co Kommanditgesellschaft | Device on a track with a drafting device for Doubling and warping of slivers with an adjustment |
| DE10317430B4 (en) * | 2003-04-15 | 2011-05-12 | Rieter Ingolstadt Gmbh | Textile machine with a drafting system |
| DE102014016785A1 (en) * | 2014-11-13 | 2016-05-19 | Saurer Germany Gmbh & Co. Kg | Method for operating a textile machine and textile machine |
| DE102014117241A1 (en) * | 2014-11-25 | 2016-05-25 | Rieter Ingolstadt Gmbh | Method for optimized stretching of at least one sliver in a textile machine and textile machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2905976A (en) * | 1955-04-01 | 1959-09-29 | Linen Industry Res Ass Of The | Drafting of textile fibres |
| DE1062587B (en) * | 1956-02-03 | 1959-07-30 | Walther Wegener Dr Ing | Method and device for automatic comparing of fiber ribbons, rovings and the like. like. when stretching |
| DE1141212B (en) * | 1961-07-29 | 1962-12-13 | Walther Wegener Dr Ing | Device for the automatic comparing of fiber ribbons when stretching |
| FR1324756A (en) * | 1962-06-08 | 1963-04-19 | Cotton Silk & Man Made Fibres | Improvements in the drawing of fibrous materials |
| DE3315247A1 (en) * | 1983-04-27 | 1984-10-31 | Zinser Textilmaschinen Gmbh, 7333 Ebersbach | SPIDER |
| EP0477589B1 (en) * | 1990-09-26 | 1996-04-24 | Maschinenfabrik Rieter Ag | Method for the correction of a determined measuring signal for the mass of a fiber band at an autolevellor for fiber bands with an outlet measuring device |
| DE4113565C2 (en) * | 1991-04-25 | 1994-05-11 | Zinser Textilmaschinen Gmbh | Method and device for monitoring the drafting force in drafting systems of spinning machines |
| DE4142110A1 (en) * | 1991-12-19 | 1993-06-24 | Rieter Ag Maschf | METHOD FOR THE AIR CONDITIONING OF PRE-YARN IN SPINNING MACHINES AND SPINNING MACHINE FOR CARRYING OUT THIS METHOD |
| JP3045178B2 (en) * | 1992-08-07 | 2000-05-29 | 都築紡績株式会社 | Method for adjusting water content in sliver supplied to spinning machine |
| DE19822886B4 (en) * | 1997-07-01 | 2007-03-29 | TRüTZSCHLER GMBH & CO. KG | Regulierstreckwerk for a fiber structure, z. As cotton, chemical fibers o. The like. With at least one default field |
| DE19906139B4 (en) * | 1999-02-13 | 2008-01-10 | TRüTZSCHLER GMBH & CO. KG | Regulierstreckwerk for a fiber structure, z. As cotton, chemical fibers o. The like., With at least one default field |
-
2001
- 2001-08-18 CN CNA018174256A patent/CN1469945A/en active Pending
- 2001-08-18 AU AU2001295484A patent/AU2001295484A1/en not_active Abandoned
- 2001-08-18 DE DE10140645A patent/DE10140645B4/en not_active Expired - Fee Related
- 2001-08-18 WO PCT/EP2001/009543 patent/WO2002016683A2/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126186B (en) * | 2007-04-11 | 2011-06-08 | 东华大学 | Traction device for on-line detecting drafting force of short fibre bundle |
| CN107407013A (en) * | 2015-02-13 | 2017-11-28 | 威实有限公司 | Method and apparatus for continuously measuring the bonding force in rove or similar fiber beam |
| CN107407013B (en) * | 2015-02-13 | 2019-12-03 | 威实有限公司 | The device of the bonding force between fiber for continuously measuring rove |
| CN112840068A (en) * | 2018-10-15 | 2021-05-25 | 特吕茨施勒有限及两合公司 | Method for regulating the pressure on a drawing frame |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10140645B4 (en) | 2011-11-24 |
| AU2001295484A1 (en) | 2002-03-04 |
| WO2002016683A2 (en) | 2002-02-28 |
| DE10140645A1 (en) | 2002-03-21 |
| WO2002016683A3 (en) | 2002-08-08 |
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