Patent Abstract:
A stranding of long winding material using a substantially cylindrical rotary body. The rotary body includes a first passage for guiding a first winding material through the cylindrical rotary body and a second passage for guiding a second winding material through the cylindrical rotary body. The first passage connects a first offset inlet on a first end side of the rotary body to a first offset outlet on a second end side of the rotary body, which opposes the first end side. The second passage connects a second input, arranged on a surface of the rotary body extending between the two end sides, to a second offset output on the second or first end side of the rotary body.

Full Description:
BACKGROUND 
     The present invention relates to a device or an apparatus, as well as a method for stranding long winding materials, in particular metal winding materials, such as wires, lacings, cables as well as insulated conductors, such as small wires or the like. 
     A complete assembly for stranding long winding materials, which includes an apparatus for stranding long winding materials as well as a method for stranding long winding materials making use of the apparatus, is disclosed in U.S. Pat. No. 6,427,432 B1. 
     The total assembly of US &#39;432 is a so-called “lyre-type horizontal pairing machine”, abbreviated “PHL”, and comprises a horizontally arranged rotary flyer-type payout system with a rotary flyer. A payout system is arranged within the body supporting the rotary flyer and is decoupled from the rotation of the flyer and serves for tangential payout of a first strand. 
     A second strand is supplied by a second payout system, which is arranged in drawing direction before the rotary flyer payout system and is guided over the rotary flyer of the flyer-type payout system. 
     At the end of the flyer-type payout system, a device is arranged for stranding the first and second strands. It is a stranding drum, which is a functionally important element for the assembly of the two individual strands. 
     This stranding drum, a cylindrical rotary body, comprises a first passage for guiding the first wire or strand through the stranding drum and a second passage for guiding the second wire or strand through the stranding drum. 
     The first passage interconnects a first central inlet on the inlet end side of the stranding drum with a first eccentric or offset outlet of the outlet end side of the stranding drum. The second passage interconnects a second offset inlet on the inlet end side of the stranding drum with a second, also offset outlet on the outlet end side of the stranding drum. 
     After passing through the stranding drum, the first and second wires are stranded together at a stranding point. 
     A drawback of the “PHL” system appears to be that both of the individual wires or strands must pass the entire length of the stranding drum, due to the constructive configuration of the “PHL”. This requires that the stranding drum on the whole can only be arranged in drawing direction following the rotary flyer-type payout system. This would oppose a general need for a compact form of the entire stranding assembly. 
     A further drawback of the “PHL” system, as described in the embodiment, in particular for the configuration of the stranding drum, can only operate as an assembly for stranding two wires. An operation of the rotary flyer payout system as a back twisting device for individual wires appears only possible for “PHL” with correspondingly complicated re-fitting of the “PHL”. The “PHL” of US &#39;432 therefore appears to be less flexible. 
     The object of the present invention is therefore to provide an apparatus as well as a method for stranding long winding materials, which allows a more compact construction of the entire stranding assembly as well as allowing a stranding assembly which is more flexible in use. 
     SUMMARY 
     The apparatus for stranding of long winding materials according to the present invention comprises a substantially cylindrical rotary body with at least one first passage for guiding a first winding material through the cylindrical rotary body and with at least one second passage for guiding a second winding material through the cylindrical rotary body. The first passage interconnects a first offset or peripheral inlet on a first end side of the rotary body with a first offset outlet on a second end side of the rotary body, opposite the first end side. 
     The second passage connects a second inlet, arranged on a surface of the rotary body extending between the two end sides, with a second offset outlet on the second or first end side of the rotary body. 
     According to the method of stranding long winding material, a first winding material is guided through a first passage of a substantially cylindrical rotary body and a second winding material is guided through a second passage of the substantially cylindrical rotary body. 
     The first and second winding materials, after passage through the substantially cylindrical rotary body, are stranded at a stranding point. 
     The first passage connects a first offset inlet on a first end side of the rotary body with a second offset outlet on a second end side of the rotary body, opposite the first end side. 
     The second passage connects a second inlet, arranged on a surface of the rotary body (cylindrical surface) extending between the two end sides, with a second offset outlet on the second end side of the rotary body. 
     The terms “inlet” and “outlet” used here in conjunction with the passage of the winding material through the rotary body should not be understood as limited to a passage of the winding material in this inlet-outlet direction, i.e. in the direction from the inlet to the direction of the outlet. A passage of the winding material in the opposite direction, i.e. from the outlet in the direction of the inlet is also possible. 
     Furthermore, the terms “offset” or “peripheral” or an “offset or peripheral inlet/outlet” are understood in that a radial displacement or radial distance (of the inlet/outlet) is present with respect to the rotational axis or center axis of the substantially cylindrical rotary body. 
     The other terms used here “centrally” or “central” correspondingly mean that no radial displacement or no radial distance (of an inlet/outlet) is present to the rotational axis or center axis of the substantially cylindrical rotary body and that such a central inlet or outlet lies on the rotational axis or center axis of the substantially cylindrical rotary body. 
     Further preferred configurations and embodiments of the invention result from the dependent claims. 
     The described embodiments and/or configurations discussed below refer both to the method and also the apparatus. 
     The stranding of several wires or strands is a further embodiment, by which one, two or even more first passages and/or one, two or even more second passages are provided respectively for guiding further winding materials through the cylindrical rotary body. 
     With at least one further first passage and one further second passage, the second offset outlet of the second passage can be arranged opposite the second offset outlet of the at least one second passage. 
     In a further preferred embodiment, the second offset outlet of the second passage and the first offset outlet of the first passage can be arranged on the same end side of the cylindrical rotary body. 
     In a further preferred embodiment, the two offset outlets are arranged such that they have the same radial distance from a rotational axis of the cylindrical rotary body and are arranged oppositely at 180°. 
     In a further preferred embodiment, the first and/or second passages are substantially parallel, in particular at the same radial distance to the rotational axis of the substantially cylindrical rotary body. 
     Particularly advantageous, especially for a compact construction of the stranding assembly is when the cylindrical rotary body is part of a rotary shaft of a rotary flyer, in particular of a rotary flyer payout system, and/or rotates with a rotary flyer, in particular a rotary flyer payout system or is connected thereto for rotation. In these cases, the stranding device or the rotary body is integrated into the rotary flyer payout system and/or is an integral element of a rotary flyer payout system. 
     A strand guidance can be improved and frictional losses avoided if a guiding device is provided to input the second winding material at the second inlet, in particular a deflection roller. 
     In a further preferred embodiment, a third passage is provided for guiding a third winding material through the cylindrical rotary body. This third passage can be configured such that it connects a third central inlet at the first or second end side of the rotary body with a third outlet, arranged on the surface of the rotary body (cylindrical surface) between the two end sides. 
     It is noted that the third winding material can also simultaneously be guided with the first and/or second winding material through the rotary body. 
     However, it is preferred when the third winding material instead of the first and the second winding materials is guided in an alternative operation through the rotary body. For example, in normal operation the first and second winding materials are passed through the rotary body and a stranding of the first and second winding materials takes place. However in the alternative operation, the third winding material instead of the first and second winding materials passes through the rotary body and a back twisting of the third winding material takes place. 
     A guiding device at the outlet of the third winding material can also be provided, in particular a deflection roller. 
     Furthermore, the first and the third and/or the second and the third and/or the first, the second and the third passage can run substantially parallel to one another and/or to a rotational axis of the substantially cylindrical rotary body. 
     The substantially cylindrical rotary body can be provided of a metallic material, such as steel or aluminum and/or the passage through the rotary body can be a (longitudinal) bore or a (longitudinal) groove or the like. 
     The special flexibility allows applications in the scope of stranding or pre-stranding at least two winding materials and also in the scope of back twisting of one of the individual winding materials. 
     The first winding material is guided through the first passage for the purpose of stranding, in particular pre-stranding, of a first winding material, in particular a first strand, and the second winding material, in particular a second strand, especially for metallic first and second winding materials, such as wires, lacings, cables and the like. The second winding material is guided through the second passage. After passing through the cylindrical rotary body, the first and second winding materials are stranded at a stranding point. 
     When stranding or in particular when pre-stranding of the first and second winding materials, it can be provided that the second winding material be guided prior to the second passage in drawing direction over a rotary flyer of a rotary flyer payout system and/or that the first winding material prior to being passed through the first passage be drawn off from a payout system of the rotary flyer payout system as a tangential payout. 
     Furthermore, when stranding, in particular when pre-stranding, of the first and the second winding material, it can be provided that the second winding material before being guided over the rotary flyer of the rotary flyer payout system in drawing direction is drawn off from a further rotary flyer payout system as a further tangential payout system. 
     The rotary flyer payout system or systems can be arranged horizontally or vertically. 
     The third winding material is guided through the third passage when used for back twisting of the third winding material, in particular a third strand. After passing through the cylindrical rotary body, the third winding material is guided over a rotary flyer of a rotary flyer payout system, upon which the third winding material receives a back twisting. 
     The rotary flyer payout system in this case can also be arranged horizontally or vertically. 
     When back twisting the third winding material, it can be provided that the third winding material before passing through the cylindrical rotary body in drawing direction is drawn off of a drawing device of the rotary flyer payout system. 
     Preferably, the apparatus, the method or its embodiments can be combined with or supplemented with detection means and/or regulation means for the winding material tension and/or drawing force of the winding material. 
     A first force measuring device, in particular a load cell force sensor can be provided for measuring a tensile force and/or tension in a winding material. The first winding material can be guided over the sensor before passing through the first passage of the substantially cylindrical rotary body. 
     In addition, a third force measuring device can be provided, in particular a third load cell or force sensor, also for measuring a tensile force and/or tension in a winding material. In addition, a stranded product out of the first and second winding material can be guided over the sensor after passing through the substantially cylindrical rotary body. 
     In a further embodiment, a second force measuring device, in particular a second load cell or force sensor, can be provided for measuring the tensile force and/or tension in a winding material through which the second winding material is guided before passing through the second passage of the substantially cylindrical rotary body. 
     When detecting and/or regulating a winding material tension and/or drawing force, in particular for detecting a desired drawing force of the second winding material and/or regulating a second drawing force of the second winding material, a first drawing force of the first winding material can be measured with a first force measuring device and/or with the second force measuring device a second drawing force of the second winding material. 
     The tensile force in the stranded product can be measured with the third force measuring device. 
     The desired or set drawing force of the second or first winding material can be determined and/or the second or first drawing force of the second winding material can be regulated by using the first drawing force of the first winding material or the second drawing force of the second winding material and the tensile force in the stranded product. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Further advantages, features and applications of the present invention can be taken from the following description of embodiments in conjunction with the attached drawings and the list of reference numerals. The drawings show components and elements of stranding assemblies in generally used, common illustrations understandable for the skilled person. 
       Shown in schematic presentation: 
         FIG. 1  is a cross sectional drawing of a lower rotary shaft of a vertical rotary flyer payout system with integrated stranding element according to a first and/or second embodiment. 
         FIG. 2  is an illustration of a lower portion of a vertical rotary flyer payout system with a lower rotary shaft with integrated stranding element as well as deflection rollers for strand guidance, which illustrates the path of a strand when stranding according to a first and/or second embodiment. 
         FIGS. 3   a  and  3   b  are illustrations of a lower portion of a vertical rotary flyer payout system with lower rotary shaft (in side view (a) as well as section illustration (b)) with integrated stranding element as well as deflection rollers for strand guidance according to a first and/or second embodiment. 
         FIG. 4  shows a perspective illustration of a vertical rotary flyer payout system with a stranding element integrated in a lower rotary shaft of the rotary flyer payout system of a first and/or second embodiment. 
         FIG. 5  is an overview of a first portion of a stranding assembly with two vertical rotary flyer payout systems used for (pre) stranding of two strands as well as for back twisting one strand according to a first and/or second embodiment. 
         FIG. 6  is an illustration of a lower portion of a vertical rotary flyer payout system with lower rotary shaft with integrated stranding element according to a first and/or second embodiment. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The following embodiments comprise in particular a stranding element  100  or  100 ′ (see  FIG. 1 ) for combining two individual strands  102  and  103  in this case (see  FIG. 2 ), which is formed as an integral part of a lower rotary shaft  600  or  600 ′ of a vertically arranged rotary flyer payout system, in the present embodiments a first  650  and a second  660  rotary flyer payout system. 
     It is remarked that the stranding element  100  or  100 ′ as described here for this embodiment in a vertical rotary flyer payout system can be used correspondingly in a horizontal rotary flyer payout system. 
     The stranding element  100  or  100 ′, as to be discussed below for the embodiments, is employed for pre-stranding (a three-fold total stranding) of the first  102  and the second  103  strands (embodiment 1), employed for a back twisting of a first  102 ′ or a second  103 ′ strand (embodiment 2) as well as employed for a stranding in combination with a strand tension/drawing force regulation of the third strand  103  (embodiment 3). 
     Embodiment/Applications In Review 
       FIG. 5  shows an overview of a portion  670  of a combined total stranding assembly, which can be used for the pre-stranding of the first  102  and the second  103  strand (embodiment 1), also for back twisting of the first  102 ′ or the second  103 ′ strand (embodiment 2) as well as also for the pre-stranding in combination with strand tension regulation and drawing force regulation for the second strand  103  (embodiment 3). 
     The described strand tension regulation in the embodiment 3 can however also be the protected subject matter alone, without the constructive details of the stranding assembly according to embodiment 1 or the back twisting device of embodiment 2. 
     Initially, the essential elements of the portion  670  shown in  FIG. 5  of the entire stranding assembly are described, which are also illustrated and where reference is also made to the further  FIGS. 1 to 4  and  6 . 
       FIG. 5  shows a first  650  as well as a second  660  vertically arranged rotary flyer payout system, configured as a single flyer system with a rotatable flyer  300  or  300 ′, for example a sleeve winder. Guide rollers  301 ,  301 ′ for strand guidance are arranged on the rotary flyers  300 ,  300 ′. The rotary flyers  300 ,  300 ′ are rotatably mounted through a lower  600 ,  600 ′ and an upper  610 ,  610 ′ rotary shaft and are driven by a drive unit  520 ,  520 ′. 
     The stranding element  100 ,  100 ′ is integrated into the lower rotary shaft  600 ,  600 ′ or the lower rotary shaft  600 ,  600 ′ is configured such that it simultaneously acts as the stranding element  100 ,  100 ′. 
     The two rotary flyer payout systems  650 ,  660  are arranged parallel to one another and can be operated and driven in synchronized manner, as in the stranding operation in embodiment 2. 
     Within the rotary body, spanned by the rotary flyers  300 ,  300 ′, and on their rotational axes  310 ,  310 ′ is a dancer-regulated payout system  500 ,  500 ′, which comprises a payout spool  400 ,  400 ′ (payout/pick-up spool) mounted in a spool frame  401 ,  401 ′. 
     The rotary flyer  300 ,  300 ′ and the payout system  500 ,  500 ′ can be decoupled from one another by decoupling a rotary flyer drive, as in embodiment 1 in back twisting operation. 
     In stranding operation (see embodiment 1), the first strand  102  is paid out from the payout spool  400  and in the back twisting operation (embodiment 2), the first strand  102 ′ is paid out under dancer regulation and with nearly constant tensile force (see embodiment 3). 
     In stranding operation (embodiment 1) the second strand  103  is paid out from the payout spool  400 ′ and in the back twisting operation (embodiment 2) the second strand  103 ′ is paid out in dancer regulation and with nearly constant tensile force (embodiment 3). 
     Corresponding means are provided for paying out the respective strands on the corresponding payout systems  500 ,  500 ′ or the respective payout spools  400 ,  400 ′, such as a guiding nipple  410 , deflection rollers and guide rollers  421 ,  431  as well as associated fastening devices  410 ,  422 ,  440 . 
     In the system  670  shown in  FIG. 5 , as well as in the  FIG. 1 to 4  and  FIG. 6 , various strand guiding elements are illustrated such as the guiding nipple  501 , deflection rollers and pulleys  510  and guiding rollers  301  for guiding the strands  102 ,  102 ′ or  103 ,  103 ′. The deflection rollers and pulleys  510  in the embodiments preferably have a diameter of at least 120 mm. 
     To minimize the total strand drawing forces in the assembly or system  670 , a single disc drawing device with a pressing belt and dancer regulation  530  is installed for the drawing action. 
     Furthermore, the two dancer regulated payout systems  500 ,  500 ′ of the system  670  each comprise a device for tensile force or strand tension measurement, here a first and a second force sensor  700 ,  701 , which are arranged in drawing direction directly following the payout position of the respective strands  102 ,  102 ′ or  103 ,  103 ′ in the corresponding rotary flyer payout system  650 ,  660 . The first  102  or the second  103  strand is passed over these first or second force sensors  700 ,  701  and their tensile force or their strand tension is measured. 
     In addition, a further, in this case a third, force sensor  710  is provided, which is arranged in drawing direction following the stranding element  100 . The stranded product out of the first  102  and the second strand  103  (embodiment 1) is passed over this sensor and its tensile force or strand tension is measured. 
     Stranding element  100  or  100 ′ (see in particular  FIG. 1  or  FIGS. 2 to 6 ). 
     The stranding element  100 ,  100 ′, as part of the lower rotary shaft  600 ,  600 ′, as shown in  FIG. 1 to 6 , comprises a longitudinally extended substantially cylindrical component rotationally mounted about a rotational axis  101 , which is connected by means of a fastening element  302  with the rotary flyer  300 ,  300 ′ rotating about the rotational axis  101  for common rotation. 
     Mounting elements  150 ,  160  with ball bearings  151  to  154  are provided for mounting the lower rotary shaft  600 ,  600 ′ or the stranding elements  100 ,  100 ′. In addition, toothed belt rings  170 ,  171  are provided on the lower end  144  and the upper end  140  of the lower rotary shaft  600 ,  600 ′ or the stranding element  100 ,  100 ′. 
     The stranding element  100 ,  100 ′ comprises three passages or bores  110 ,  120  and  130  for guiding the first  102  and the second  103  strand or the first and second strand  102 ′,  103 ′ in stranding operation as well as in back twisting operation. 
     The first passage  110 , which serves for passing the first strand  102  in stranding operation, connects an offset or peripheral inlet  111  at the upper end side or inlet end side  140  of the stranding element  100 ,  100 ′ in a path parallel to the rotational axis with a radial outlet  112  at the lower end side or outlet end side  141  of the stranding element  100 ,  100 ′. 
     The second passage  120 , which serves for passage of the second strand  103 , connects an inlet  121  of the stranding element  100 ,  100 ′ arranged approximately centrally on the surface  143  of the stranding element  100 ,  100 ′ in the longitudinal direction of the stranding element  100 ,  100 ′ in an approximately parallel path to the rotational axis  101  with a radial outlet  122  on the outlet end side  141  of the stranding element  100 ,  100 ′. A deflection roller  123  for guiding the second strand  103  is arranged at the inlet  121 . 
     The third passage  130 , which serves passage of the first or second strand  102 ′,  103 ′ in back twisting operation, connects a central inlet  131  on the inlet end side  140  in an approximate parallel path to the rotational axis  101  with an outlet  132  arranged on the forward one-third of the surface  143  of the stranding element  100 ,  100 ′ seen in the longitudinal direction of the stranding element  100 ,  100 ′. A deflection roller  133  for guiding the strand  102 ′,  103 ′ is arranged at the outlet  132 . 
     The path of the strands  102 ,  103  or  102 ′,  103 ′ through the stranding element  100 ,  100 ′ in stranding operation as well as in back twisting operation are designated in  FIG. 1  with the reference numerals  105 ,  106  and  107 . 
     A double dot-dashed line  105  illustrates the path of the first strand  102  through the stranding element  100  in the case of stranding. The triple dot-dashed line  106  illustrates the path of the second strand  103  through the stranding element  100 ,  100 ′ also in the case of stranding. 
     The quadruple dot-dashed line  107  illustrates the path of the strand  102 ′ or  103 ′ through the stranding element  100 ,  100 ′ in the case of back twisting. 
     Embodiment 1:Dancer-Regulated Payout System when Used as Pre-Stranding Assembly or as Stranding Element  100  with Pre-Stranding 
     In the following, the above system  670  when used as a pre-stranding assembly is described (for a three-fold total stranding). 
     In this case, the second rotary flyer payout system  660  of the flyer driver is decoupled and the payout system  500 ′ is used for “normal” tangential payout. 
     From here, the second strand  103  is drawn off under dancer regulation with nearly constant tensile force and is guided over the stationary rotary flyer  300 ′ of the second rotary flyer payout system  660 . The first rotary flyer payout system  650  is also used only for tangential payout, from whose payout system  500  the first strand  102  is also drawn off in dancer-regulated manner. 
     The second strand  103  is then passed further over the rotary flyer  300  of the first rotary flyer payoff system  650 . 
     The two strands  102 ,  103 , as described above or in the following in more detail, are then guided and rotated through the stranding element  100 , which is part of the lower rotary shaft  600  with the rotary flyer  300  and in this manner guided to the first stranding point  220 . Through the rotation of the rotary flyer  300  of the first rotary flyer payout system  650 , the strands  102 ,  103  are stranded, i.e. form a pair. 
     The pair  220 , stranded in this manner, is then passed through a further second stranding point—not illustrated—and receives a second stranding operation. 
     In addition, the product is passed through a pair stranding assembly, where it receives the third stranding operation when exiting from the rotary flyer of this pair stranding assembly. In this manner, the individual strands receive a back twisting, normally 33%, depending on the stranding velocity in the first stranding operation. 
       FIG. 1  shows the stranding element  100 ,  100 ′ as it is employed in the pre-stranding of the first  102  and the second  103  strands. 
     A double dot-dashed line  105  illustrates the path of the first strand  102  through the stranding element  100  in the case of pre-stranding. The triple dot-dashed line  106  illustrates the path of the second strand  103  in this case. In the case of pre-stranding, as shown by the path  105 , the first strand  102  is passed at the inlet end side  140  through the radial inlet  111  into the stranding element  100  or the lower rotary shaft  600 . 
     The further guidance or passage  110  of the first strand  102  runs parallel to the rotational axis  101  of the stranding element  100 , until the strand  102  leaves the stranding element  100  via the outlet  112  at the outlet end side  141 . 
     The second strand  103 , whose path through the stranding element  100  is designated with the reference numeral  106 , is passed through the second passage  120  of the stranding element  100 . 
     It enters into the stranding element  100 ,  100 ′ through the inlet  121  arranged approximately centrally on the surface  143  of the stranding element  100 ,  100 ′ seen in longitudinal direction of the stranding element  100 ,  100 ′. 
     The strand  103  passes in an approximately parallel path to the rotational axis  101  and exits at a radial outlet  122  on the outlet end side  141  of the stranding element  100 . A deflection roller  123  for guiding the second strand  103  is arranged at the inlet  121 , by which the second strand  103  is guided into the stranding element  100 . 
     Embodiment 2:Dancer-Regulated Payout System in Use as Back Twisting Payout or Stranding Element  100 ,  100 ′ Under Back Twisting 
     In the following, the above system  670  is described in a further application in back twisting operation. 
     In this case, the two vertical and parallel rotary flyer payout systems  650  and  660  are operated for flyer payout, where the two flyer payout systems are operated simultaneously and in synchronization. 
     The two payout spools  400 ,  400 ′ of the two flyer payout systems  650  and  660  are driven by a drive unit  450 , coupled here with the respective rotary flyers  300 ,  300 ′ and the second strand  103 ′ is drawn out under dancer regulation with nearly constant tensile force. 
     The respective drawn off strands  102 ′ and  103 ′, as described above in detail or will be described below, are rotated with the respective stranding element  100 ,  100 ′, which is part of the lower rotary shaft  600 ,  600 ′ and subsequently guided over the respective rotary flyer  300 ,  300 ′. Through this, through their rotation, they receive a twisting. 
     After this, the strands  102 ′ and  103 ′ are passed to a first stranding point—not shown—and receive a first stranding operation. 
     The product is then passed through a pair stranding assembly, where it receives a second stranding operation when leaving the rotary flyer of this pair stranding assembly. Here, the twisting is either completely or partially twisted back out depending on the back twisting percent or the degree of back twisting present. 
       FIG. 1  shows the stranding element  100 ,  100 ′, as it is also employed for back twisting operation. The quadruple dot-dashed line  107  illustrates the path of the strand  102 ′ or  103 ′ through the stranding element  100 ,  100 ′ in the case of back twisting. 
     For back twisting, as the path  107  shows, the first  102 ′ or the second  103 ′ strand is passed at the inlet end side  140  through the central inlet  131  into the stranding element  100 ,  100 ′ or the lower rotary shaft  600 ,  600 ′. 
     The further central passage  130  of the strand  102 ′,  103 ′ runs along the rotational axis  101  of the stranding element  100 ,  100 ′ for a predetermined distance, until the strand  102 ′,  103 ′ leaves the stranding element  100 ,  100 ′ over a deflection roller  133  via the outlet  132  in the direction of the rotary flyer  300 ,  300 ′. 
     Embodiment 3:Regulation of the Strand Tension 
     Embodiment 3 represents a wire or strand tension regulation in the stranding assembly according to the embodiment 1. 
     The described strand tension regulation can however also be the subject of protection alone without the constructive details of the stranding assembly according to embodiment 1. 
     The aim of the following embodiment and description of strand tension regulation is to achieve the same strand tension at the stranding point of the two strands when performing stranding or pre-stranding. 
     The strand tension regulation according to this embodiment should therefore control the different tensions in the two strands, which arise due to the different lengths of the payout paths of the two strands (up to the first stranding point) and the resulting different friction forces on the two strands. 
     For the purposes of strand tension regulation, the two rotary flyer payout systems  650 ,  660  are each equipped with a dancer regulator for regulating the drawing of the respective strand, as already described above. 
     Furthermore, the two payout systems  650 ,  660  each comprise a device for tensile force measurement or strand tension measurement, in this case a first  700  and a second  701  force sensor, which in drawing direction is arranged directly after the payout position of the respective strand in the corresponding (first and second) rotary flyer payout system  650   660 . The first or the second strand  102 ,  103  is passed over the first or second force sensor  700 ,  701  and their tensile force or strand tension is measured. 
     In addition, the stranding assembly comprises a further, in this case a third force sensor  710 , which in drawing direction is arranged after the stranding point  200  of the two strands  102 ,  103 . The stranded product  220  (out of the first and second strands  102 ,  103 ) is passed over this sensor and its tensile force or strand tension is measured. In the following this is referred to briefly as the product tension or product tensile force. 
     In the embodiment of the strand tension regulation, a first dancer-regulated payout of the first strand  102  takes place with a predetermined master or nominal drawing force F(nominal) in the rotary flyer payout system  650  used for tangential payout. 
     The drawing force or strand tension of the first strand  102  is measured directly following the drawing location in the first payout system  650  for adjusting the nominal drawing force of the first strand  102  and for guaranteeing a drawing operation with constant nominal drawing force. The drawing force is measured and correspondingly adjusted (F(nominal)=F(payout 1)) or readjusted (automatically during operation). 
     In addition, the product tension or tensile force F(product) of the (pre-)stranded product  220  is measured by means of the third force sensor  710 . 
     The drawing force F(payout 2) for the second, dancer-regulated payout of the second strand  103  of the second rotary flyer payout system  660 , also used for tangential payout, is then determined as follows:
 
 F (payout 2)= F (nominal)−(product tension−2× F (nominal)).  (Eq. 1)
 
     This determined drawing force for the second strand  103  is then set for the dancer-regulated payout of the second payout system  660  and, analogously with the first payout system  650 , is monitored by the second force sensor  701  and optionally (automatically during operation) adjusted or readjusted. 
     The following numerical examples illustrate the strand tension regulation. A nominal drawing force of F(nominal)=10 N is set at the first dancer regulated payout of the first payout system  650 . The force measurement by the third force sensor  710  delivers, for example, a product tensile force of F(product)=27 N. 
     According to the above equation (Eq. 1), a drawing force for the second, dancer-regulated payout of the second strand  103  F(payout 2)=3 N is determined. The second strand  103  is then drawn out with this drawing force F(payout 2)=3 N. This in return results in F(product)=20 N. 
     These adjustments of the first and second drawing force with F(payout 1) or F(nominal) and F(payout 2) make for uniform strand tension when stranding and therefore a qualitatively higher value product. 
     The drawing force for the second strand  103  is varied (reduced) until the value of 2×F(nominal) results for the product tension. 
     Finally, it should again be mentioned that the described assembly is highly flexible, due to the different application possibilities (stranding, back twisting, tension regulation). 
     A fabrication of strand pairs for UTP, FTP, STP and S/STP for the categories 5, 5+, 6 and possibly 7 can be increased by more than 30%. 
     The application as a normal back twisting unit or assembly (embodiment 2) for high value products, such as category 8, four-fold and bus lines is also possible, as is a main stranding with back twisting of 0 to 100%.

Technology Classification (CPC): 3