DE2230972C3 - Method for stranding stranding elements for electrical cables to form a stranding unit with twisting direction that changes in sections - Google Patents

Description

first verseüpunkt and immediately in front of the 15 heads (60, 64) at the same time at intervals Verseüpunkt is twisted, whereby those are those that the passest of a longitudinal

Twisting of the strand at intervals changed element of the strand (51) from the first (59) to

is, characterized in that the second (45) correspond to the penalty point,

the strand (51) immediately behind the first 8. Device according to claim 7, characterized in

Verseüpunkt (59) with a constant Tor- »o indicates that the stranding heads over the sliding direction and directly in front of the second drive (61) with different ratios

Verscüpunkt (45) can also be driven with constant lead ratios,

bender, but the former direction of torsion
twisted in the opposite direction of torsion
is, with the strand between the two 45

rope points always at least three sections

(L ₁ , L ₂ , L ₃ ) with different torsional lay lengths, and that the ratio and /

or the difference between the directly to stranding electrical cables, in particular

ter the first Verseüpunkt (59) on the strand 30 _for stranding telecommunication cables, are in new- (51) acting twisting and the simultaneous _rer time methods and devices developed tig immediately before the second Verseüpunkt been with which the stranding elements in successive ( 45) twisting acting on the strand is changed in the following longitudinal sections alternately with a spacing that is at most a left-hand twist (S-twist) and a right-hand twist (Z-twist) three times the throughput time of a longitudinal element. All strandings of this type, which are referred to as the tes of the strand from the first to the second stranding "SZ stranding", have the advantage. ί correspond to point. part that the stranding elements to be stranded from

2. The method according to claim 1, characterized in that stationary drainage racks can run and that indicates that the immediately behind the he the further processing of the from the verseu elements

f I sten infiltration point (59) on strand (51), 40 SZ-infiltrated stranding units in the same working

Y acting twist is always the same size. -gang can be connected.

I 3. The method according to claim 1, characterized in that are used to carry out the SZ stranding in

t I indicates that the Vcrseüvorrichtungen immediately behind the he rule revolving, the

§ », "'first point of contention (59) on the strand contain a buffer

P i kende twisting at the same time with the immediate 45 use intermediate storage with fixed storage content

% * i bar before the second point (45) on the det, which alternates in sections with

'ξ line acting to.dating at intervals, speed or direction of rotation while the

jt the throughput time of a longitudinal element of the throughput speed of the stranding elements

ß strand (51) from the first to the second stranding stant is (USA.-Patent 3169360). The intermediate

*, point correspond, is changed. 50 small memory of fixed memory contents can also

4. The method according to claim 3, characterized by rotating at constant speed and direction of rotation,

indicates that the act on the strand while the throughput speed of the stranding

J \ , Öen twisting is changed proportionally to one another.

", 1 *" / Aäert. See patent specification 1 468 382). Another possibility

'' The 5th device for carrying out the process consists of 55

s ί ■ · ...... rens according to one of claims 1 to 4, in the case of the intermediate memory being used, the memory content

• r " ¹ ■ immediately after the first stranding point and to be enlarged and reduced alternately (German *

1 '^ .. ^' immediately in front of the second stranding point, see an interpretation document 1665 831; NTZ 1970, Issue 9, rotating, the strand perpendicular to its axis p. 472 to 480). Finally, it is also known to work with a force-fittingly capturing stranding head arranged 60 stationary stores, which are made by Verseilist, characterized in that the Verscilköpfc are flown around (German Auslegeschrift (60, 64) with the same and always 1 665 536).

rotating in a constant direction of rotation, the known ones used for SZ stranding

the ratio between the speed of the first buffer store usually consist of two Stranding head and the speed of rotation of the second roller groups arranged in parallel 65 axes is always greater than the ratio between the stranding elements alternating around one roll see the distance (L.) of the first verse head of one group of roses and then on one (60) to be led around from the first contraction point (59) and the unrolling of the other roller group

the. In addition to one that is still known, for example to root differently to Verseileinheil. Resolver

disk-shaped design of the intermediate storage, efforts are made to avoid the reversal points of the twisting

(German Offenlegungsschrift 1 817 803) it is the prin-

Also known to be staggered as a temporary storage facility,
fixed distance from each other, in terms of S In addition, one is to reduce the

their rotational movements rigidly coupled to each other electrical couplings strive to the distance of the

To use stranding heads (Wire and Wire Pro- reversals of the twisting direction if possible

ducts, January 1967, pp. 90 to 97 and 159/160). Make a big one. In the case of SZ stranding processes that start with

The practical embodiment for this consists of working in a buffer, this means back

e! ner caterpillar chain (German Auslegeschrift jo visibly of the intermediate storage used, that the

1 515 730). ren memory content should be as large as possible. This leaves

The stranding of communication cables is further possible but only through spatial large and thus also

a stranding process is known that can achieve without the heavy intermediate storage,
mentioned buffer works. With this The requirement for intermediate storage with possible

Stranding method, the stranding elements are made to have a large storage capacity

summarized in a strand, which is between two after the highest possible production speed

Fixed points in the stretched, twistable state counteract that, in turn, only with the smallest possible

from one the strand perpendicular to its axis formation of the intermediate storage and thus with short

frictionally detecting twisting device zen distances of the reversal points of the twisting

in sections by a multiple., can be achieved by stranding direction.

gen is twisted. In order to achieve a high level of effectiveness in the SZ stranding with the degree of twisting, it is provided with the help of intermediate rows made up of groups of rollers that the distance between the stranding elements as a run-up store in a first fixed point, which is approximately the point and the pick-up point of the rotating device corresponding to half the diameter of the rollers is smaller. ■ In the rotation device and as a running point of rotation of the latch are therefore - ^{in: beze:} chneten first fixed point; at the same time it is - depending on the speed of the intermediate feed - that the same twisting direction is exerted on the stranding elements

The facing length of the stranding unit is at least 30 the distance between the stranding elements and the rotation f ; 'at least equal to the distance between the leading axis and are proportional to high loads point and the point of application of the twisting front of the stranding elements. Often through this Ι 'direction and at most equal to three times the tensile loads the speed of the intermediate storage ff Distance between the point of application of the twisting and thus the stranding

ing device and the entry point is limited (significant 35 th stranding elements.

^l . see interpretation document 1 765 452). As Verdrehungsvor- The invention is based on the object to

_it 'direction a stranding head is used, which is used in the production of SZ stranding units that are later,

'For example, from two opposing roles special immediately afterwards to one another

H , which are stranded with their running surfaces against that of a stranding group, a method to

Extrusion. To create a homogeneous 4 °, this at high production speed

Twist between the entry point and the good decoupling of the stranding units within

The point of application of the twisting device can be guaranteed to the stranding group formed later.

-between the entry point and the twist- To solve this problem, the invention goes

\: 'vorrichtr.ng further twisting devices on - from a process in which the stranding

p, be ordered. Here, the rotational speeds of the elements used to form a strand are a first local

fl sätzlidie.i twisting devices on the rotationally fixed stranding point at constant speed

j number of the actual twisting device are supplied and in which the

it's correct. elements formed, point between the first stranding In carrying out the latter SZ-supply and a second, likewise stationary rejuvenation s zi \ method results in particular in the manufacturer 50 rope point in a stretched, tordierbarem state adjustment of star quads the difficulty that with the remaining strand immediately behind the first strand j simple means twisting the star quad and immediately before the second stranding

can not be homogenized to such an extent that point is twisted, the twisting of the strand vein flashover after leaving the rotation is changed at intervals. According to the Invention F | can be reliably avoided. The strand becomes immediately behind the first l | The SZ stranding is usually carried out within the framework of the stranding point with a constant torsion direction ^ a two-stage stranding process is used at and immediately before the second stranding point That means Vtrseilelemente, for example cores, to likewise with always the same, but the first-SZ-stranded nuances. For example, pairs, threes called torsion direction opposite gate or \ ierern, u.id then twisted several such 60 sion direction, with the strand between SZ rope units to form a rope group, both rope points always at least three parts of the game a basic bundle to be stranded. Sections with different torsion lay lengths the SZ stranding units are in parallel gene; for the invention is still essential operations manufactured. To within the from the! I that the ratio and / or the difference between SZ stranding units subsequently formed stranding 65 can be seen immediately behind the first stranding point group a '· good decoupling of the SZ stranding unit - twisting acting on the strand and the ie; i to ensure each other, it is customary to simultaneously unmitieibar before your second Vsrseil-Sdilaglänge the stranding units from stranding unit point twisting acting on the strand in

Intervals will be changed, which will be at most three times that which immediately before the second earning the passage time of a longitudinal element of the rope point twisting acting on the strand Strand from the first to the second stranding point according to the amount at intervals of a certain amount, The first value, for example by ± 50%, is around the For the new stranding process it is therefore essential to be right behind the central stranding point on the strand that the acting twisting combined to form a strand fluctuates. Stranding elements between the two stranding points In a further development of the invention, the are in a stretched state and the twisting exerted on this strand also ropes in the same way with a constant torsion direction that the one immediately after the first direction are twisted and that the twisting point acting on the strand io stranding point on the strand simultaneously acting twists at least simultaneously with the one immediately before the second Tordiet sheaths acting on the strand in sections according to the amount of the twisting point. In doing so, the stranding elements on dip are changed at intervals that correspond to the sequence of passes the elongated guide no centrifugal time of a longitudinal element of the strand from the first forces when passing through the between the stranding 15 to the second stranding point. Here you can score located intermediate storage exercised NEN the acting on the strand twists and mechanical stresses when overflowing in particular also changed proportionally to one another avoided by pulleys. This can be.

Production speed - that is, both the number of the twisting device used and the 20, a device is particularly suitable at the un-take-off speed - can be increased significantly immediately after the first stranding point and immediately. Directly in front of the second twisting point, a rotic-en-Furthermore is arranged by the twisting head, which with regard to its knurl, forces the strand perpendicular to its axis always constant twisting. shows that the stranding elements when passing through the 25 These stranding heads, the use of which is always sufficiently stranded and known ("Draht" magazine 22 (1971), issue 9) that the reversals of the twisting direction, pp. 619 to 625) , run in a further development of the invention only when passing through the second stranding point with mutually identical and always the same lead, whereby wire overlaps with entering the direction of rotation, whereby the relationship between the Ί orsion devices are avoided see the speed of the first stranding head and ^the speed of the The second stranding head is always larger.Finally, the second stranding head is decoupled from the first stranding point due to the ratio between the distance of the first twisting head, which is at least partially different from the first stranding point and the stanchions at the first and second stranding point the later SZ stranding units roped to one another point and the distance between the second stranding head is achieved. Through the lower from the first stranding point; furthermore, there is a significantly different twist, namely a mo ·, Not constant over the length, but fluctuates continuously within certain limits from the first to the second. As a result, the twisting point will correspond, and the SZ twisting units stranded in a stranding group can be changed, even with the same mean twist length. When reversing the stranding head that acts on the strand rotates at a constant speed, it is also possible in this context to take into account the speeds of the stranding heads and transient processes that change at the same time and are known at intervals (German interpretation of the transit time of a longitudinal element of the 1 765 462). The modulation of the twist length of the herged strand from the first to the second twisting point distorted SZ twisting units also makes it possible to speak. With a proportional change in the speed of the distance between the reversal points of the twists of the two twisting heads, these can be selected relatively short via direction in the SZ twisting units to the same drive with different transmission, for example shorter than 5 m, so that the tongue ratios drive; in this case, the distance between the first and the second speed difference between the two stranding heads, for example the stranding head, does not become excessively large. 55 always wise 20%.

With regard to the practical implementation of the for used in the context of the invention

It is recommended to use the new SZ stranding method;

first stranding point and the information on the second stranding point in German Auslegeschrift 2 230 973

the twisting acting on the strand is described.

wear after in the same order of magnitude, i.e. not 60 An embodiment of the invention is

too different to choose. A simple execution based on one shown in FIG

Approximate example is the immediately behind device for performing this process

the first stranding point acting on the strand and a diagram shown in Figure 2 in more detail

To choose twisting always the same size and therefore explains

only the one immediately before the second stranding point G ₅ In Fig. 1, an SZ stranding machine is shown,

for this purpose, from spatially fixedly stored wire supplies 41 from stranding head 60 at a constant speed, and via deflection rollers 42, which rotate in the circuit while the speed of the stranding head is stored in place 43, the actual SZ stranding advance 64 in sections by, for example, + 50 ° / o fed in the direction of 55. After passing through the speed of the stranding head 60 fluctuates. Here, the SZ stranding device reaches the star quad 50 5, the period of a constant rotary movement over the deflecting pin 45, which is wrapped by the star quad thread of the second stranding head a maximum of three times, can amount to 47 times the time that a longitudinal element of the stored drafting wheel 46 and is subsequently star quad 55 to pass through the portion L, f 'j to the mounted in the frame 49 take-up drum that is, the portion between the stranding nipple 59 k' 48 wound. io and the deflection roller 45, is required. in this case, loading 'the SZ-stranding apparatus 55 consists mainly is the possibility of both twisting heads with the help% 'CHCN from the two stranding heads 60 and 64, which are rotatably mounted in a single motor, for example by means of the uprights 57 and the 58th to the motor 61, For this purpose, the shaft f is then used to drive these stranding joints, the motors 61 and 68 are provided, which replace the motor 65. In addition, 65 provided that the stranding heads with the aid of FIG. 15 will drive two magnetic coupling drive belts 62 and 66 instead of the motor 65. Lungs 69 and 70 are arranged, which then provide the drive. During the stranding, the cores 40 to the stranding head 64 run either via the belt 66. j next into the stranding nipple 59 and will effect with it or via the belt 72. Every drive! combined to form strand 51. This strand is belt is a different over- in this case. assigned in the area between the stranding nipple 59 and the settlement ratio.
J j arranged directly behind this stranding nipple. th stranding head 60 twisted. Since the stranding head has 64 stranding heads, it is advisable to make these changes in; ! With the same direction of rotation as the stranding head 60, to make distances that circulate the run-through time of a, the strands 51 forming strands length element of the star quad 50 from the stranding nip-ί 40 when passing through the distance between the pel 59 to the pulley 45 corresponds . The speed ■ · \ sten twisting and second twisting with- change in the twisting heads can hereby stranded such geeinander. After passing through the second, it is selected that the rotational speeds of the stranding heads' stranding head 64 acts on the strand in the area are always proportional to one another. In this case, too, between this stranding head and the one immediately there is the possibility of driving both stranding heads via the deflecting pulley 45 arranged behind, which drives the second motor of the same type.

The twisting point represents a twisting in opposite directions. In the new SZ twisting device the

set direction, which means that the two infeed stranding heads 60 and 64 have an intermediate storage

fen into the SZ stranding device on the strand rather. Essential for the formation of this

acting twist superimposed. The mutual side memory is that the two stranding heads 60

stranded cores show in the range between 35 and 64 at least in sections at the same time

the Vcrseilnippel 59 and the pulley 45 always rotate at different speeds. Then you

three sections /. ,, L ₂ , L ₃ , which are separated from each other on the route between the two

due to different twist lengths, i.e. rope heads 60 and 64 - i.e. within the intermediate

different torsion states, distinguish. Page memory - for the star-beast passing through

By changing the speed 40 rer 50 in sections, a continuous change in the torsion

with constant direction of rotation - the Verseilkop- stand and it will be with regard to the final

fes 64 or the speeds of both stranding heads 60 twisting of the star quad constantly changing

and 64 results in the superposition of the helix length achieved with the help of the

Most twisting head applied twist and coupling of several such twisted together

which is improved with the help of the second stranding head. A diagram showing the

th twist a final twist of the course of the resulting twist depending on

Adcrn, the direction of which changes section by section. represents wedge of the length of the star quad, shows

When changing the speed of the stranding heads 60 Fig.2. Here the length 1 corresponds to a length and 64 it is proceeded in such a way that section by section a constant twisting direction

either the difference between the speeds of the two axles is changed to three times the value of the spatial distance between the two heads. For example, the L _{1 of} the stranding heads 60 and 64.

1 sheet of drawings

Claims (7)

<ί stood (L1 + L2) of the second stranding head (64) Claims: from the first Verseüpunkt (59), and that the ratio and / or the difference in speeds 1. Method for stranding stranding elements - stranding heads at intervals not exceeding elements for electrical cables to a stranding 5 times the throughput time of a longitudinal - hcit with section-wise alternating twisting elcmcntes of the strand (51) from the first to the direction in which the stranding elements / only correspond to the second point of connection, can be changed Formation of a strand a first are stationary. Verscil point at constant speed 6. Apparatus according to claim 5, guided thereby and in which the from the Verseil- io indicates that the speed of the immediately elements formed, arranged between the first verse behind the first verse point (59). seilpunkt and a second, also stationary th stranding head (60) is unchangeable. Contaminated point in stretched, twistable access 7. Apparatus according to claim 5, thereby confessed remaining strand immediately behind the indicates that the speeds of the stranding