EP3728713A1 - Twisting method and installation with tension control for the production of reinforcing cords for tyres - Google Patents
Twisting method and installation with tension control for the production of reinforcing cords for tyresInfo
- Publication number
- EP3728713A1 EP3728713A1 EP18845298.1A EP18845298A EP3728713A1 EP 3728713 A1 EP3728713 A1 EP 3728713A1 EP 18845298 A EP18845298 A EP 18845298A EP 3728713 A1 EP3728713 A1 EP 3728713A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strand
- voltage
- assembly
- speed
- point
- 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.)
- Granted
Links
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- 238000000034 method Methods 0.000 title claims description 38
- 238000009434 installation Methods 0.000 title claims description 30
- 230000003014 reinforcing effect Effects 0.000 title description 3
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 46
- 238000005259 measurement Methods 0.000 claims abstract description 22
- 230000001105 regulatory effect Effects 0.000 claims abstract description 6
- 238000012544 monitoring process Methods 0.000 claims description 11
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- 239000000463 material Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 210000000056 organ Anatomy 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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Classifications
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
- D02G3/48—Tyre cords
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
- D02G3/28—Doubled, plied, or cabled threads
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B3/00—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B3/00—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material
- D07B3/08—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material in which the take-up reel rotates about the axis of the rope or cable or in which a guide member rotates about the axis of the rope or cable to guide the rope or cable on the take-up reel in fixed position and the supply reels are fixed in position
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
- D07B7/02—Machine details; Auxiliary devices
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2301/00—Controls
- D07B2301/25—System input signals, e.g. set points
- D07B2301/258—Tensile stress
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2301/00—Controls
- D07B2301/35—System output signals
- D07B2301/3583—Rotational speed
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2301/00—Controls
- D07B2301/35—System output signals
- D07B2301/3591—Linear speed
Definitions
- the present invention relates to the field of the production of wire elements, so-called “wired”, by assembling by twisting of several continuous strands, including textile son.
- the present invention relates more particularly to the application of such a method of assembly to the manufacture of filamentary reinforcing elements which are intended to enter the constitution of tires, including pneumatic tires for vehicles.
- the strands are stored on input coils, from which each strand is unrolled to an assembly point where said strand is interlaced with the other strand or strands to form a filamentary element. , says "wired”.
- the strands may have been previously submitted, before being unrolled and assembled, to a twisting operation, to present some pre-twist around their axis.
- a motorized drive device such as a capstan, which is placed between the input coil and the assembly point in order to give the strand considered a predetermined advance speed.
- the filament element is itself driven downstream of the assembly point by a motorized output coil, on which said filament element is wound as it is manufactured.
- a slider which is movably mounted in free sliding on a ring, coaxial with the axis of rotation of the output coil, and through which the wire element passes before joining the coil.
- the behavior of the slider is sensitive to the degree of filling of the output coil, insofar as the orientation of the filamentary element coming out of the slider to join the coil varies according to whether the output coil is very little filled, in which case the wire element, which has a small diameter of turn, is oriented quasi-radially relative to the axis of the coil, and therefore almost radially relative to the axis of the ring which the slider, or depending on whether the output coil is filled, in which case the wire element, which has a large turn diameter, is oriented almost tangentially to the outer perimeter of said coil.
- the objects assigned to the invention therefore seek to overcome the aforementioned drawbacks and propose a new method and a new facility for manufacturing a wire element interleaving strands whose implementation is facilitated, and which has a improved robustness and good reproducibility.
- Another object assigned to the invention is to provide a new method and a new wire element manufacturing facility that has a certain versatility, allowing to achieve on demand, and reproducibly, a wide variety of ranges manufacturing elements filial, with distinct properties.
- the objects assigned to the invention are achieved by means of a method of manufacturing a wire element by interleaving at least a first strand and a second strand separate from the first strand, said method comprising the following steps: a step (a) of feeding during which the first strand and the second strand, respectively, are conveyed to an assembly point at which the first strand and the second strand meet,
- said method being characterized in that it comprises a closed-loop strand voltage control step (a1), during which:
- a voltage setpoint referred to as an "assembly voltage setpoint" which is representative of a longitudinal tension state that it is desired to obtain in the first strand when said first strand reaches the assembly point; measuring, at a first voltage measuring point which is located along said first strand and upstream of the assembly point with respect to the direction of routing of said first strand, the so-called “effective assembly voltage” voltage which exert within said first strand,
- a voltage feedback loop is used to determine an error, called a "voltage error", which corresponds to the difference between the assembly voltage setpoint and the effective assembly voltage of the first strand, and driving, from said voltage error, a voltage regulator, which acts on the first strand upstream of the assembly point, so as to automatically converge, within said first strand, the voltage d effective assembly to the assembly tension setpoint.
- the inventors have indeed found that, in a number of situations, and particularly depending on the nature of the strands used, the properties of the filament element manufactured could depend closely on the tension of the strands at the time of the assembly.
- the implementation of a regulation by the voltage of one or more strands, rather than speeds, thus allows to finely control, and reproducibly, the properties of the filial element manufactured.
- the method according to the invention is particularly robust and reproducible.
- the method makes it possible to slave simultaneously one strand in tension and the other strand in speed, or even to select, for at least one of the strands or for each strand of the filament element. , a voltage control or speed control, which offers in particular multiple possibilities of combinations when searching for new film elements with particular properties.
- the interleaving which occurs at the point of assembly allows somehow to "freeze” the properties that have been conferred on the element filial through voltage servocontrols and / or in a selected speed for the different constituent strands of said element filar, and thus substantially retain the properties and advantages provided by the specific combination of these selected servocontrols.
- the method according to the invention is perfectly applicable to the manufacture of a wire element involving lengths of different strands from one strand to another, and in particular to the manufacture of said filial elements.
- "Gimped" a strand of which forms a central core around which one or more other strands are helically wound.
- Figure 1 illustrates, in a schematic view, an example of an installation, of the ring type, to implement the manufacturing method according to the invention.
- FIG. 2 illustrates, in a diagrammatic view, a "trio" roll arrangement which may be used, depending on the configuration of the rollers and the routing of the strand through said rollers, or as a motorized drive device for carrying out a speed regulation, either as a voltage monitoring device, for measuring the strand voltage.
- FIG. 3 illustrates, in a schematic perspective view, an example of a voltage monitoring device using a pulley-type wire guide mounted on an elastically deformable support formed by a cantilever beam.
- the present invention relates to a method of manufacturing a wire element 1 by interleaving at least a first strand 2 and a second strand 3, said second strand 3 being distinct from the first strand.
- the filament element 1 thus obtained is also called a "cable".
- filar is meant an element which extends longitudinally along a principal axis, corresponding to the longitudinal direction, and which has a transverse section, perpendicular to the main axis, whose largest dimension D is relatively low compared to the dimension L along the main axis.
- relatively low is meant that L / D is greater than or equal to 100, preferably greater than or equal to 1000.
- the ratio of the largest dimension D of the section on the smallest dimension d of the section may for example be greater than or equal to 20, preferably greater than or equal to at 30 and more preferably greater than or equal to 50.
- the filamentary element 1 may have a transverse section whose largest dimension D is between 0.05 mm and 5 mm, or even for example between 0.2 mm and 2 mm, and, more particularly, whose transverse section geometrically fits in a cylinder, centered on the main axis of the wire element, whose diameter is between 0.05 mm and 5 mm, or even for example between 0.2 mm and 2 mm .
- said filament element 1 may have a continuous length L equal to or greater than 1 m, 10 m, 100 m, or even 1000 m, and for example between 500 m and 100,000 m.
- each of the strands 2, 3 may have a 1 a transverse section whose largest dimension D is between 0.05 mm and 5 mm, or even for example between 0.2 mm and 2 mm, and , more particularly, whose transverse section geometrically fits in a cylinder, centered on the main axis of the wire element, whose diameter is between 0.05 mm and 5 mm, or even for example between 0.2 mm and 2 mm.
- the strand 2, 3 considered may have a continuous length L equal to or greater than 1 m, 10 m, 100 m, or even 1000 m, and for example between 500 m and 100,000 m.
- the first strand 2, and / or the second strand 3 may be mono-filament, that is to say consisting of a single monolithic filament, or multi-filaments, that is to say consisting of a set of filaments forming a bundle.
- the filament or constituent filaments of the first strand 2, respectively the second strand 3, may be of any suitable nature.
- textile filaments preferably of polymeric material, for example polyamide (Nylon TM), aramid, rayon (fiber derived from wood cellulose), polyethylene terephthalate (PET), etc., will be used. or in any combination of such polymeric materials.
- polyamide Nylon TM
- aramid rayon
- rayon fiber derived from wood cellulose
- PET polyethylene terephthalate
- the method can be applied to the assembly of any number of strands 2, 3.
- the number of strands 2, 3 used to form the wire element 1 may be between two and twelve strands, and particularly preferably between two and four strands.
- a filament element 1 with four strands, comprising a central strand forming a core and three peripheral strands wound around said core.
- each of the implementation variants of the feed devices 6A, 6B, 6C, 6D, 6E shown in FIG. 1 can be applied to the first strand 2, to the second strand 3 , to any one of the strands used to make the filament element 1, or to all the strands used to manufacture the filament element 1.
- Each strand shown in said FIG. 1 thus bears, for convenience of description, the double reference "2, 3".
- the present invention of course relates to an installation 5 for implementing the method.
- said installation 5 may correspond to a ring loom which has been perfected by adding to it in particular a voltage servo unit 30, or voltage control units 30. , making it possible to slave in closed loop the voltage of the strand 2, 3 considered or, respectively, the respective voltages of the strands 2, 3 considered.
- the method comprises a step (a) of feeding during which the first strand 2 and the second strand 3 are respectively conveyed to an assembly point 4 at the which first strand 2 and second strand 3 meet.
- the installation 5 will include for this purpose a feed device 6 responsible for conveying the first strand 2 and, respectively, the second strand 3, to an assembly point 4 at which the first strand 2 and the second strand 3 meet.
- the feed device 6 will preferably be arranged so as to allow unwinding and conveying to the assembly point 4 the strand 2, 3 concerned, from an input coil 7 on which said strand 2, 3 is initially stored.
- one and / or the other of the strands 2, 3 for assembly may have undergone a prior individual twisting, before use by the installation 5, and thus form one or «surtords Each stored on its respective input coil 7.
- the feed device 6 of the strand 2, 3 considered may advantageously comprise a motorized drive device 8.
- Said motorized driving device 8 is located upstream of said assembly point 4, and is arranged to give the strand 2, 3 considered a so-called speed "advance speed" V fwd in response to a set of instructions. drive that is applied to said motorized drive device 8.
- the motorized driving device 8 can drive the strand 2, 3, in a sense called "routing direction" F, of the input coil 7 to the assembly point 4.
- routing direction F in which the strand 2, 3 moves from the input coil 7 to the assembly point 4, and then beyond, corresponds to a direction of movement. upstream downstream.
- the motorized drive device 8 will be formed by a capstan, as shown in FIG. 1.
- such a capstan 8 may comprise two rollers 9, 10, including a motorized roller 9 and a free roller 10, around which is wound several turns of the strand 2, 3 considered, so as to achieve a dragging the strand 2, 3 by friction.
- Such a trio of call 11 comprises three rollers 12, 13, 14, including a planetary roller 12, preferably free, and two satellite rollers 13, 14, preferably motorized and synchronized, said rollers 12, 13, 14 being arranged so that the strand 2, 3 is frictionally driven between said rollers in a W-shaped path (uppercase omega).
- the sun roller 12 may preferably come into contact with the two planet rollers 13, 14, and the cylindrical surface of the sun roller 12 may be coated with a layer of anti-slip rubber, in order to improve the driving of said planetary roller 12 by the satellite rollers 13, 14.
- the feed device 6 may include several separate motor drive devices 8, each assigned to a strand 2, 3 different.
- a second motorized drive device 8 similar to the first motorized drive device but distinct from the latter, and assigned to the second strand 3, if necessary a third motorized drive device 8 assigned to a third strand, etc.
- the method also comprises an interleaving step (b) during which the first strand 2 and the second strand 3 are interlaced with each other, at the point of assembly 4, so as to forming a wire element 1 from said at least first and second strands 2, 3.
- the interleaving may preferably be performed by twisting so as to helically wind the second strand 3 around the first strand 2, or the second strand 3 and the first strand 2 around each other, to form filament element 1.
- the installation 5 will therefore include an interlacing device 15, and more particularly a twisting device 15, responsible for interlacing the first strand 2 and the second strand 3 with each other, at the point assembly 4, so as to form a wire element 1 from said at least first and second strands 2, 3.
- the method will also comprise a step (c) of evacuation, during which the wire element 1 is conveyed from the assembly point 4 to an outlet station located downstream of the assembly point 4, and more preferably, during which said wire element 1 is wound on an output coil 16.
- the interlacing device 15 may comprise a guide eyelet 17, for example made of ceramic, intended for guide the wire element 1 downstream of the assembly point 4, here directly downstream of the assembly point, and a ring 18 which is coaxial with the output coil 16 and on which a slider 19, which forms a passage point of the wire element located downstream of the guide eyelet 17 and upstream of the output coil 16 is mounted free sliding.
- the slider 19 adopts a relative rotational movement around the output coil 16, which causes a twisting force of the wire element 1, and thus the twisting of the strands 2, 3 at the point of assembly 4, while guiding the progressive winding of said element wire 1 on the output coil 16.
- the ring 18 is further reciprocated in translation along the axis of the output coil 16 so as to distribute the wire element turns 1 over the entire length. of the output coil 16.
- the feed device 6 may preferably comprise a distributor 21 arranged to distribute the strands 2, 3 in the space, and this in order to order the geometric configuration according to which said strands 2, 3 converge towards the assembly point 4, which assembly point 4 is located downstream, here directly downstream, and more preferably just below, said distributor 21.
- the distributor 21 may be in the form of a support plate 22 which defines a plurality of passage points 23 each intended to guide one of the strands 2, 3 from the input coils 7 and / or motorized driving devices 8.
- the passage points 23 may be formed for example by holes, preferably each provided with a ceramic distribution eyelet, or else by guide pulleys.
- the crossing points 23 define predetermined gaps between the different strands 2, 3, so that, starting from the base represented by the support plate 22, the strands converge along the edges of at least one polygon (in plan), or even at least one polyhedron (in three dimensions), whose vertex corresponds to the assembly point 4.
- the first strand 2 passes through a central passage point 23, around which are disposed the other passage points 23 for the other strands 3 constituting the wire element 1.
- the central passage point 23 may be arranged relative to the other passage points 23 so that the first strand 2 follows a path between the central passage point 23. and the assemblage point 4, which corresponds substantially to a height of the polygon, respectively to a height of the polyhedron, formed by the other strands 3.
- the implementation of a central passage point 23 allows in particular to use the first strand 2 as a central core, around which will wind the other strands or 3.
- the method comprises a step (a l) of servocontrol in strand tension.
- the tension of the strand 2, 3 corresponds to the longitudinal tensile force exerted within the strand 2, 3 at the point considered, and therefore to the tensile stress resulting from the application of this effort.
- centi-Newton By convention of use, the voltage can be expressed in centi-Newton (cN). Note that a centi-Newton corresponds in practice to the weight of a mass of one gram, so that, by language abuse, we can sometimes express the tension of the strand in "grams".
- the servocontrolling in strand tension takes place in a closed loop.
- step (a1) servocontrolling strand voltage:
- a voltage setpoint referred to as an "assembly voltage setpoint" T set, is defined which is representative of a state of longitudinal tension that it is desired to obtain in the first strand 2 when said first strand reaches the assembly point 4
- ER_T T set - T actual
- a voltage regulator 34 which acts on the first strand 2 upstream of the assembly point 4, of so as to converge automatically, within said first strand 2, the effective assembly voltage T_actual to the assembly voltage setpoint T_set.
- the installation 5 thus comprises a voltage control unit 30, arranged to slave in a closed loop the voltage of the considered strand according to an operating mode called "voltage control mode", said servo unit 30 in tension comprising for this purpose:
- a voltage set point fixing member 31 which makes it possible to set a set point, referred to as an "assembly voltage set point" T_set, which is representative of a longitudinal tension state that it is desired to obtain in the first strand 2 when said first strand reaches the assembly point 4,
- a voltage monitoring member 32 for measuring, at a first voltage measurement point PT1 which is situated along said first strand 2 and upstream of the assembly point 4 with respect to the direction of routing F of said first strand , the tension known as "actual assembly tension" T actual which is exerted within said first strand 2,
- a voltage feedback member 33 which makes it possible to evaluate an error, called a "voltage error" ER_T, which corresponds to the difference between the assembly voltage setpoint T set and the actual assembly tension T current of the first strand 2
- a voltage regulator 34 placed under the control of the voltage feedback device 33, and which can act on the first strand 2 upstream of the assembly point 4 so as to converge automatically, within said first strand, the effective assembly voltage T actual to the assembly voltage setpoint T_set.
- the unit 30 for servocontrolling the strand in tension, and more particularly one and / or the other of the members 31, 32, 33, 34 of setting of voltage setpoint, of voltage monitoring, of feedback. , and voltage regulation, may include, or be formed by, any appropriate computer or electronic controller.
- the voltage control can thus be performed automatically, substantially in real time.
- the voltage of the strand 2, 3, and the enslavement voltage according to the invention which results, allow to control accurately and reproducibly the conditions of formation of the filament element 1, and this continuously, which allows to obtain homogeneous properties and consistent with the specifications on almost all or even the entire length of the filament element 1 obtained.
- a structure similar to that described hereinabove which comprises, for each strand concerned, a voltage control unit 30 of the strand in question, said voltage control unit comprising a member 31 for fixing an assembly voltage setpoint T set for the concerned strand, a member 32 for monitoring the actual voltage T of the relevant strand at a first voltage measuring point PT1 situated along said strand in question, a feedback member 33, and a voltage regulator member 34 which acts on said strand strand concerned to automatically converge the effective voltage of the strand concerned towards the voltage setpoint applicable to said strand.
- a voltage control unit 30 for offer the possibility to enslave or not, the strand in tension, and this individually and independent of other strands.
- T_set different assembly voltage instructions for different strands 2, 3, and provide separate servo of each of said strands 2, 3, independent of other strands.
- the actual actual tension T of the considered strand is measured by means of a tension monitoring member 32 comprising a thread guide 35, such as a pulley or roller in free rotation, which abuts against the strand 2, 3 considered, here at the point of PT1 voltage measurement chosen, and which is carried by an elastically deformable support 36 which is measured elastic strain by means of a suitable sensor 37, for example by means of a strain gauge.
- a tension monitoring member 32 comprising a thread guide 35, such as a pulley or roller in free rotation, which abuts against the strand 2, 3 considered, here at the point of PT1 voltage measurement chosen, and which is carried by an elastically deformable support 36 which is measured elastic strain by means of a suitable sensor 37, for example by means of a strain gauge.
- the voltage monitoring member 32 may comprise a wire guide 35 formed by a pulley carried by a support 36 formed by a beam, preferably horizontal, mounted cantilevered.
- the force exerted by the strand 2, 3 bearing against the pulley 35 results in a flexion of the beam 36 that can be measured by a suitable sensor, such as a strain gauge 37 .
- the tension monitoring member 32 may take the form of a trio 11, in which the planetary roller 12, in free rotation, will form the guide wire 35 and will be mounted on a support 36 comprising a movable bearing which carries said sun roller 12 and which cooperates with a resilient spring-like suspension member, so that the sensor 37 will measure the deformation in compression of said spring, or , in an equivalent manner, will measure the displacement of the sun roller 12 and its bearing suspended against said spring, to deduce the actual assembly tension T actual strand considered.
- the planetary roller 12 will then be spaced from the satellite rollers 13, 14 of the trio 11, themselves also in free rotation, and the strand will follow a path in W passing from below each satellite roller 13 , 14 and over the planetary roller 12, so that the strand voltage is reflected by a force that tends to bring the sun roller 12 of the fictitious line through the respective centers of the two satellite rollers.
- the strand 2, 3 passes over satellite rollers 13, 14 of the trio, and underneath the sun roller 12, which is sufficiently close to the satellite rollers 13, 14 to interfere with the strand 2, 3 and force said strand 2, 3, supported by the satellite rollers 13 , 14, to bypass said planetary roller 12, so that the tension of the strand 2, 3 is translated by a force which tends to move the planetary roller 12 away from the imaginary line passing through the respective centers of the two satellite rollers 13, 14.
- any other suitable means including any suitable set of rollers or pulleys, to evaluate the actual assembly tension T actual.
- the first strand 2 is preferably, as mentioned above, driven in displacement towards the assembly point 4 by means of a device motorized drive 8, such as a capstan, which is located upstream of said assembly point 4 and which is arranged to give the first strand 2 a so-called speed "forward speed" V_fwd in response to a setpoint of drive that is applied to said motorized drive device 8.
- a device motorized drive 8 such as a capstan
- the first voltage measurement point PT1 is then chosen, where the actual actual connection voltage T is measured, so that said first voltage measurement point PT1 is located in one section.
- the measurement of the effective assembly voltage T_actual is done at a measuring point PT1 which is between the position (considered along the path taken by the concerned strand) of the motorized drive device 8 and the position (considered along the path taken by the strand concerned) of the assembly point 4, and which is therefore particularly close to the assembly point 4.
- the voltage measuring point PT1 thus selected may therefore be located between the assembly point 4 and the last motor element, here the motorized drive device 8, which precedes the assembly point 4, in the upstream-downstream direction of the strand 2, 3.
- the effective assembly tension T actual is therefore preferably measured downstream of the last motorized device (here the motorized drive device 8) which is capable of acting actively on the strand 2, 3 considered and of meaningfully modifying the tension before said strand 2, 3 reaches the assembly point 4.
- the last motorized device here the motorized drive device 8
- the motorized drive device 8 which is capable of acting actively on the strand 2, 3 considered and of meaningfully modifying the tension before said strand 2, 3 reaches the assembly point 4.
- the voltage regulator 34 may then for example comprise a friction roller, coming into contact with the strand 2, 3, and opposing the advance of the strand a braking torque which is adjusted, for example by means of a friction pad or a magnetic brake, depending on the value of the voltage error ER_T.
- the motorized drive device 8 in particular the device of the invention, will preferably be used.
- the use of a motorized device is to slow down the strand 2, 3, upstream of the point assembly 4, by applying to the strand, via the motorized device 8, a feedrate V fwd sufficiently reduced, which will have the effect of retaining the strand 2, 3 and therefore increase the tension of said strand 2, 3, or on the contrary to accelerate the strand 2, 3, upstream of the assembly point 4, that is to say to increase the feed rate V fwd of said strand, which will have the effect to reduce the tension of said strand 2, 3, by "slackening" said strand.
- the use of the motorized drive device 8 as a voltage regulator 34 makes it possible to provide a compact and inexpensive installation, since the same motorized drive device 8 serves both to supplying the strand 2, 3 concerned and servocontrolling the tension of said strand 2, 3.
- the method may also comprise a unwinding step (aO), during which the considered strand, here for example the first strand 2, is unwound from an input coil 7, by means of a unwinding device 50 which is distinct from the device motorized drive 8 (of the considered strand) and which is located upstream of said motorized drive device 8.
- aO unwinding step
- the unrolling device 50 comprises a motorized spool holder 51 for receiving and driving in rotation, at a so-called speed "input coil speed" w7 chosen, the input coil 7 concerned.
- the strand 2, 3 concerned which is at the input of the motorized drive device 8, is thus provided with an effective unwind tension T undind actual controlled, which sets a first pre-tensioning step, from which we will then be able, thanks to the action of the motorized drive device 8, to modify the state of tension of the strand 2, 3 in the approach section, downstream of the motorized drive device 8 and upstream of the assembly point 4, in order to confer on said strand 2, 3 the actual T_actual assembly tension desired.
- the inventors have found that the creation and maintenance, thanks to a dual motor (successively that of the unwinding device 50 and that of the motorized drive device 8), a pre-tension stress, in the form of an effective unwinding tension T unwind actual of regular value and well controlled, advantageously allowed to adjust more precisely and more easily the actual assembly tension T actual of the strand concerned.
- a unwind tension T unwind set (and thus obtain an effective unwinding tension T unwind actual) of between 50 cN (fifty centi-Newton) and 600 cN, and for example equal to 100 cN, 200 cN, or 400 cN, and obtain, at the second voltage level, an assembly voltage T current, accurate and stable, which will be perfectly in accordance with a T instruction set that will have freely chosen in a very wide possible range, between 15 cN (fifteen centi-Newton, which corresponds to a mass of about 15 grams) and 100 N (one hundred Newton, which corresponds to a mass of about ten kilograms), even between 5 cN (five centi-Newton which corresponds to a mass of about 5 grams) and 200 N (two hundred Newton, which corresponds to a mass of about twenty kilograms).
- the method advantageously makes it possible to set an assembly tension setpoint T set which is chosen. less than the unwinding tension set point T unwind set, and to obtain a stable servocontrol of assembly tension.
- assembly voltage that the corresponding effective assembly voltage) T set, T actual to a very low level, for example of the order of a few centi-Newton (which is equivalent to the weight of a mass of some grams) or a few tens of centi-Newton (which equals the weight of a mass of a few tens of grams), without risk of creating tension jolts in the strand, and without risk of passing the assembly tension effective T discount by a value zero, which could cause the strand 2, 3 out of the guides (pulleys, rollers, etc.) which define the path of said strand through the installation 5.
- the voltage measurement at the second voltage measurement point PT2 can be carried out by any voltage monitoring device 32 as described above and placed at said second measurement point PT2, for example a trio 11 according to FIG. a cantilever pulley 35 according to FIG.
- the installation 5 comprises a speed control unit 60 arranged to slave in a closed loop the feedrate V_fwd of one of the strands. 2, 3, preferably first strand 2, according to an operating mode called "speed control mode", said speed control unit 60 comprising for this purpose:
- a speed setting member 61 which makes it possible to set a setpoint, referred to as the "forward speed setpoint" V_fwd_set, which corresponds to a value of speed of advance which it is desired to give to the strand 2, 3 considered , here for example the first strand 2, upstream of the assembly point 4, a speed monitoring member 62 which makes it possible to measure, at a forward speed measuring point PV1 which is situated along said strand 2, 3 considered, here for example the lond of said first strand 2, and upstream of the point assembly 4, a speed value called "actual feed rate” V_fwd_actual which is representative of the actual feed rate of the considered strand, here for example the first strand, at the point of measurement PV 1 considered,
- ER_V V_fwd_set - V_fwd_actual
- a speed regulator member 64 placed under the control of the speed feedback member 63, and which can act on the strand 2, 3 considered here, for example on the first strand 2, upstream of the assembly point 4, so as to converge automatically the actual feed rate V fwd actual strand 2, 3 considered, here for example the first strand 2, to the feedrate setpoint V_fwd_set.
- the installation 5 may then preferably comprise a selector 70 which selectively activates, for the first strand 2, the voltage control mode or the speed control mode.
- the invention advantageously proposes to offer the user a selection possibility, at least for the first strand 2, and where appropriate for one and / or the other of the others.
- strands 3 between a mode of servocontrolling said strand in tension, and a mode of servocontrol of said strand in advance speed.
- the method according to the invention may therefore provide a corresponding selection step.
- the selector 70 allows the user to choose, for the considered strand, and preferably strand by strand, whether it wishes to achieve voltage regulation or speed regulation.
- the installation 5 therefore offers great versatility of use.
- the selector 70 may be formed indifferently by any mechanical, electromechanical, electronic or computer appropriate unit.
- the installation comprises one or more selectors 70 which make it possible to select, for each of the first and second strands 2, 3, and independently for each of the first and second strands 2, 3, a mode of servocontrol. voltage or, alternatively, a speed control mode.
- the invention can bear as such on a method of manufacturing a wire element 1 in which is enslaved at least a first strand 2 in tension as described above, so as to confer on said strand 2, when said strand 2 reaches the assembly point 4, a state of longitudinal tension corresponding to a voltage setpoint T set, while simultaneously slaving at least a second strand 3 at a speed of in advance, so as to give the second strand 3, when said strand 3 reaches the assembly point 4, a feed rate which corresponds to a set speed command V_fwd_set determined.
- the invention may therefore relate in particular to a corresponding installation 5, which comprises at least one voltage control unit 30 for servocontrolling the first strand 2 in voltage and a speed control unit 60 allowing to enslave the second strand 3 in advance speed.
- a corresponding installation 5 which comprises at least one voltage control unit 30 for servocontrolling the first strand 2 in voltage and a speed control unit 60 allowing to enslave the second strand 3 in advance speed.
- a voltage control step (a1) (such that this step has been described above with reference to the first strand 2)
- step (a2) of speed control in speed according to a step (a2) of speed control, according to which is fixed a forward speed setpoint V fwd set, which corresponds to a forward speed value that it is desired to confer to the second strand 3 upstream of the assembly point 4, and a speed regulating member 64 is used, which acts on the second strand 3 upstream of the assembly point 4, so as to converge automatically, the speed of actual advance V_fwd_actual of the second strand 3 to the feedrate setpoint V_fwd_set.
- This speed control step (a2) can of course be carried out using the speed control unit 60 described above.
- the speed control mode is based on a speed measurement in advance, and does not involve measuring the tension of the strand, which makes the two servo modes independent one of the other, even exclusive of each other (in that it may be impossible to regulate at the same point of one strand at a time the speed of advance of the strand and the tension of said strand).
- the detail of the speed control unit 60 and its constituent members 61, 62, 63, 64 has been shown only on the branch 6 A of the feed device 6 of Figure 1.
- such a speed control unit arrangement 60 is however perfectly applicable, alone or in combination with a voltage control unit and a selector 70, to one or the other of , or to all the other branches 6B, 6C, 6D, 6E of the feed device 6, that is to say to one and / or the other of the strands, to the majority of the strands, or even to all the strands 2, 3.
- one of the strands 3, for example the second strand 3, is provided with a speed control unit 60 but without a voltage control unit 30, then at least one other strand, for example the first strand 2, will be provided with at least one voltage servo unit, or both a voltage servo unit and a speed servo unit 60 which will then be associated with a selector 70 making it possible to opt selectively for the use of one or the other of these servo units 30, 60 available at the level of the first strand 2.
- the unit 60 for servocontrolling the strand in speed, and more particularly one and / or the other of the bodies 61, 62, 63, 64 for setting speed reference, speed monitoring, feedback , and speed control, may include, or be formed by, any appropriate computer or electronic controller.
- the speed control can thus be performed automatically, substantially in real time.
- the speed control and in particular the measurement of the actual feed rate V_fwd_actual strand 2, 3 considered, preferably occurs near the assembly point 4, and for example in the approach section, between the last motorized element that precedes the assembly point 4 and said assembly point 4, so that the feed rate considered, and slaved, is representative of the feed speed at which the strand 2, 3 reaches the assembly point 4.
- the speed measuring point PV 1 may be located at the motorized driving device 8.
- a speed monitoring device 62 a rotational speed sensor integrated in the motor which drives said motorized drive device 8
- a speed sensor integrated in the motor which drives the motorized roller of capstan 8 or trio 11 which forms said motorized drive device 8 for example a speed sensor integrated in the motor which drives the motorized roller of capstan 8 or trio 11 which forms said motorized drive device 8.
- the feed device 6 comprises a motorized drive device 8, such as a capstan, in particular as described above, which is located upstream. of said assembly point 4 and which drives the first strand 2 in displacement towards the assembly point 4, then, preferably, said motorized drive device 8 can form alternately, according to the servo mode defined by the selector 70 the voltage regulator 34 used by the voltage servo unit 30 or the speed controller 64 used by the speed servo unit 60.
- the invention therefore proposes to use the same motorized drive device 8 selectively either as a voltage regulator 34 or as a speed regulator 64 of the strand 2, 3 considered.
- the branch 6A is used to select, through the selector 70, between a voltage control mode (unit 30) and a speed control mode (unit 60). This is the assembly voltage control mode that is active here. It is completed by a peeling device 50 with motorized bobbin holder 51.
- the branch 6B illustrates a "basic" unwinding, with an input coil 7 in free rotation. Voltage control is available, but inactive.
- the branch 6C proposes a motorized unwinding device 50 which makes it possible to control the unwinding tension of the strand T unwind actual, and which supplies a device motorized drive 8, here capstan type, which performs a voltage control. A two-stage voltage regulation is thus obtained.
- the branch 6D is a variant of the branch 6B, in which it has replaced the unwinding of the input coil 7, vertical axis by a unwinding said "to the parade" from an input coil 7 to horizontal axis.
- the branch 6E is a variant of the branch 6A, within which we replaced the unwinding of the input coil 7, vertical axis by a unwinding said "to the parade" from an input coil 7 with a horizontal axis, and within which it has been chosen to achieve a control voltage assembly, and configured accordingly the selector 70 to activate the voltage control unit 30 and turn off the unit 60 servo quickly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Ropes Or Cables (AREA)
- Tension Adjustment In Filamentary Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1763110 | 2017-12-22 | ||
PCT/FR2018/053386 WO2019122698A1 (en) | 2017-12-22 | 2018-12-18 | Twisting method and installation with tension control for the production of reinforcing cords for tyres |
Publications (2)
Publication Number | Publication Date |
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EP3728713A1 true EP3728713A1 (en) | 2020-10-28 |
EP3728713B1 EP3728713B1 (en) | 2023-08-23 |
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ID=61599421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP18845298.1A Active EP3728713B1 (en) | 2017-12-22 | 2018-12-18 | Method and system for twisting tyre cords with a controlled tension |
Country Status (5)
Country | Link |
---|---|
US (1) | US11332853B2 (en) |
EP (1) | EP3728713B1 (en) |
CN (1) | CN111511969B (en) |
ES (1) | ES2960389T3 (en) |
WO (1) | WO2019122698A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CA3162487A1 (en) | 2020-02-06 | 2021-08-12 | Sabrina RIH | Tyre for an agricultural vehicle, comprising a hybrid carcass reinforcing element |
CN111304941B (en) * | 2020-02-20 | 2022-01-25 | 江苏兴达钢帘线股份有限公司 | Multilayer strand steel wire rope production equipment |
KR102367672B1 (en) * | 2021-10-15 | 2022-02-25 | 주식회사 크리에이티브굿즈 | The combining apparatus |
CN116216417B (en) * | 2023-04-11 | 2024-06-04 | 江阴天润信息技术有限公司 | Electromagnetic induction-based towed multi-shaft equal-tension synchronous regulation and control method and system |
Family Cites Families (18)
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BE760803A (en) * | 1970-12-23 | 1971-05-27 | Scient Et Tech De L Ind Textil | CONSTANT FLOW WIRE SUPPLIER WITH PNEUMATIC TENSION REGULATION |
BE792656A (en) * | 1971-12-13 | 1973-03-30 | Yoshida Engineering Cy Ltd | HIGH-SPEED WRINKLE FOR THE FORMATION OF A DOUBLETORSION AND PRIMARILY SUITABLE FOR THE STRINGING OF STEEL WIRE |
FR2318975A1 (en) * | 1975-07-23 | 1977-02-18 | Sodetal | MACHINE FOR THE MANUFACTURING OF CABLES |
DE2812100C2 (en) * | 1978-03-20 | 1987-04-16 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | Method for guiding a complete strand composed of individual strands and producing stranded wire coils and device for carrying out the method |
US5535579A (en) * | 1992-04-30 | 1996-07-16 | Southwire Company | Method and apparatus for controlling takeup tension on a stranded conductor as it is being formed |
BE1010240A3 (en) * | 1995-10-16 | 1998-04-07 | Gilbos N Textilmaschf | Assembleermachine for automatic yarn. |
US20050133653A1 (en) * | 2001-03-23 | 2005-06-23 | Invista North America S.A R.L. | Tension controlled thread feeding system |
US6776319B1 (en) * | 2002-04-15 | 2004-08-17 | Jack G. Haselwander | Strand tension equalizing apparatus |
WO2004048679A1 (en) * | 2002-11-25 | 2004-06-10 | Bridgestone Corporation | Twisting machine, twisted wire manufacturing method, ply, and pneumatic tire |
DE102004001033B3 (en) * | 2004-01-03 | 2005-04-28 | Saurer Gmbh & Co Kg | Multiple twist yarn, as a cord or sewing thread and the like, has a bobbin at the spindle of twisted threads which are separated and passed through a brake and guide to the spindle cording point |
FR2869329B1 (en) * | 2004-04-23 | 2006-06-16 | Rieter Textile Machinery Fr | DEVICE FOR MANAGING WIRE ASSEMBLIES IN TEXTILE MACHINERY FOR TRANSFORMING THESE YARNS |
FR2888157B1 (en) * | 2005-07-08 | 2009-10-09 | Michelin Soc Tech | METHOD OF REGULATING TENSION OF A PNEUMATIC REINFORCEMENT |
CN201530945U (en) * | 2009-11-23 | 2010-07-21 | 江苏泰隆减速机股份有限公司 | Double-twisting rope laying machine |
ITMI20100887A1 (en) * | 2010-05-18 | 2011-11-19 | Btsr Int Spa | METHOD AND DEVICE PERFECTED TO POWER A THREAD TO A OPERATING MACHINE WITH TENSION AND CONSTANT SPEED |
WO2013114547A1 (en) * | 2012-01-30 | 2013-08-08 | 三菱電機株式会社 | Wire transport device |
ITMI20121846A1 (en) * | 2012-10-30 | 2014-05-01 | Btsr Int Spa | METHOD AND SYSTEM FOR FEEDING AT CONSTANT VOLTAGE AND STYLING A WIRE TO A TEXTILE MACHINE ACCORDING TO THE LAST PHASE OF OPERATION |
CN105353717A (en) * | 2015-11-23 | 2016-02-24 | 江苏赛福天钢索股份有限公司 | Steel wire rope strand tension on-line control system and method |
CN106319712A (en) * | 2016-08-26 | 2017-01-11 | 山东合信科技股份有限公司 | Ring-spun elastic weft yarn used for weaving tyre cord fabric and production process of ring-spun elastic weft yarn |
-
2018
- 2018-12-18 CN CN201880083132.1A patent/CN111511969B/en active Active
- 2018-12-18 WO PCT/FR2018/053386 patent/WO2019122698A1/en unknown
- 2018-12-18 US US16/954,101 patent/US11332853B2/en active Active
- 2018-12-18 ES ES18845298T patent/ES2960389T3/en active Active
- 2018-12-18 EP EP18845298.1A patent/EP3728713B1/en active Active
Also Published As
Publication number | Publication date |
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WO2019122698A1 (en) | 2019-06-27 |
CN111511969A (en) | 2020-08-07 |
US11332853B2 (en) | 2022-05-17 |
US20210180219A1 (en) | 2021-06-17 |
EP3728713B1 (en) | 2023-08-23 |
ES2960389T3 (en) | 2024-03-04 |
CN111511969B (en) | 2022-07-26 |
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