How sz - twisting

 

(57) Abstract:

Use: production of cable products. The inventive reduced in the beam veins have between aldatzeko and receiver and when moving with a constant speed clamp located at some distance from each other two torsion points, apply a rotating torque in each of the two points located between the twisting point, providing a twist lived relative to their common axis with the same angular velocity, fill stranded conductors part of the distance between the first course of movement lived point twisting and the second point of application of the rotating moment, relieve the rotating point with the first point in time, ensuring the passage of the twisted cords of a specified part of the distance, at the end of the specified portion of the distance towards the second point of application of the rotating moment of the veins clamp, forming an additional point of twisting and rotating point with the first point off simultaneously with the formation of this additional point of twisting. Simultaneously with the removal of the first rotating torque speed you can reduce the angular velocity of rotation of trotehniki and can be used for twisting way SZ cable products.

There are several method of manufacturing rolled products using SZ stranding, including communication cables, power and control cables [1].

One of the common ways SZ twisting lived is twisting short lived, kept in a bun, grab two points located some distance between them, and by the force of the impact in the other two points are twisting [2]. The formation of the twisted beam is carried out with unidirectional movement lived with constant speed.

Veins in the area between the first point of the curl and the point of application of the first torque being twisted around the longitudinal axis with a constant angular speed in the left direction of type S. In the area between the second point of the curl and the second point of application of the second torque strands are twisted in the direction of type Z. the Distance between the first point of the curl and the point of application of the second torque is the drive. When twisted the beam to fill the capacity of the drive, carry out the removal of the effects of both torques up until the twisted beam will release the drive, at the same time, the drive is filled in a function of the speed of movement lived and inertia mechanisms, performing a rotation of the beam.

The main disadvantage of the above method is the large length of the transition section between the direction of twisting of the type S and the direction of twisting Z. In the transition area of the beam is stretched and chaotic pitch. The length of the transition segment is the limiting factor in the increase in linear velocity of the lived.

Closest to the proposed invention the technical essence is a way of SZ stranding, including the frequency of exposure torques on the twisted lived or periodic change in the direction of the impact torque [3].

This method is chosen as a prototype. The main disadvantage of this method is the large length of the transition area, resulting in reduced mechanical and electrical specifications. Long transition section is difficult during construction and repair operations by the user.

The challenge is to develop technologies SZ twisting, allowing to obtain twisted the workpiece (a couple, three, four and more lived) with a short transition sections, as well as in improving proizvoditeley.pitstsa additional point clamping beam, which upon removal of the first torque becomes a twisting point.

In Fig.1, 2 shows a diagram of the proposed method SZ twisting.

With several permanently installed giver node 1 is given to the conductor 2, which are grouped into a bun and grabbed two twisting points a and e, at other points b and d located at a certain distance from each other, the beam is applied in the plane of the cross-section torque to twist the wires around their longitudinal axis with a frequency of ni.

The first point is the curl of a is located before the first torque M1the second twisting point e is located after the second torsional moment M2additional point of Curling c is located before the second torque M2. When removing the impact of the first torque at point b additional point c becomes a twisting, while simultaneous unidirectional influence of the first and second torques additional point c becomes the guide.

The distance between the first point of twisting a and an additional point c curl is part of the drive with a capacity of L is the beam displacement with constant speed v = const. In the manufacturing process of the twisted beam during the first period of time T1= Ln/v is twisting lived on the section a-b in the direction S, and the section d-e in the opposite direction Z. On the section a-b of the twisted beam with a step h = and get a positive number of twists per unit of length K1= = , where h is the pitch; ni- speed lived around their common axis twisting at the point of application of torque; K - the number of twists per unit length.

During the first period of T1twisted beam with a number of twists TOH1enters the drive and fills its capacity. When the head of a twisted beam reaches point c produce the removing of the first torque. At this time additional point c becomes the twisting (Fig.2).

During the second period of T2= T1upon further advancement of the beam at the section C-d of length L there is an additional twist beam in the same direction S. In this segment the number of twists is determined by the algebraic sum of the number of twists coming from the drive and re-created, i.e., on the interval c-d is the number of twists per unit length is equal TOc-d= 2nII/v. Incoming twisted beam with this per unit length TOandequal to the algebraic sum determined by the following ratio:

Kand= (2n11- n11)/v = n11/v.

The beam emerging from the point e, curled in the direction of S.

During the period of T2twisted billet exempt and non-twisted veins fill up the drive.

Thus, during the cycle, is equal to two periods, there is a twisting of the first beam in the Z-direction and then in the direction S. as the direction of application of the second torque at the point d remains constant, the transition area between the direction S, and Z is minimal.

In the simplest case, the point of twisting and provided in the form of gauge 3 point curl e - 6 gauge, an additional point of twisting c - caliber 7. The application torque M1and M2to the beam at points b and e is, for example, twisting the heads 4 and 5, which rotate veins around their common axis with the rotational speed n1and n2respectively. Vibration lived limited by the bushing 8, the movement of the cores is made of a traction device 9 (Fig.1).

The following are specific examples of implementation of this method of twisting, allowing pinoy speed of manufacture.

P R I m e R 1. The manufacture of a curved beam is performed when promoting lived with constant speed and includes the following process steps:

1 operation. Make the dressing several cores from the radiating device via calibre 3, the torsion head 4, additional caliber 7, twisting head 5, 6 gauge, traction device 9 and then to the receiving drum (Fig. 1). Then execute moving liquid with constant speed v = const with the simultaneous application to the bundle lived at points b and d unidirectional torque M1and M2. Torque exercised by the rotation of the twisting heads with a frequency of n1and n2. The operation lasts until time Tn= Ln/v, where a major part of a twisted beam reaches point C, place extra caliber 7.

2 operation. At point b remove the influence of the first torque, the rotational speed of the first twisting head n12= 0, additional caliber 7 at the point c becomes twisting.

During the second period of time T2= T1twisted beam releases the drive and non-twisted veins fill it, during this period when the rotation of the head 5 in which de d-e partial untwisting of the twisted beam. Then steps 1 and 2 periodically repeated.

In Fig.3 shows the results of the analysis of the operation of example 1, in which in the first period T1:

v = 150 m/min

n11= n12= 1500 1/min in the second period, T2:

v = 150 m/min

n21= 0

n22= 1500 1/min

In Fig.3 presents:

a) the frequency of rotation of the first head n11;

b) the frequency of rotation of the second head n12;

C) the number of twists per unit length of the drive TOn;

g) the final number of twists per unit length TOand.

The number of twists per unit length of the output section of the beam in period T1equal TOZ= = - n12/v = -1500/150 = - 10 1/m, the Beam is twisted in the direction Z. In the second period, T2the output segment of the twisted beam in the direction of S is determined by the ratio:

KS= (n11+ n21- n21)/v =n11/v = 10 1/m

The pitch of the beam h = 1/Kand= 100 mm

P R I m m e R 2. 1, the operation is carried out similarly to the operation 1 of example 1.

2 operation. At point b remove the influence of the first torque, the rotational speed of the first twisting head n222< n12. In this state, the process lasts until the moment of release the drive from the twisted beam and populating it with non-twisted parallel to the moving cores (Fig.4).

Then steps 1 and 2 periodically repeated.

In Fig.5 presents the results of the analysis operation example in which in the first period T1< / BR>
v = 150 m/min

n11= n21= 3000 1/min

in the second period, T2< / BR>
v = 150 m/min

n21= 0

n22= 1500 1/min

In Fig.5 presents:

a) the rotation frequency of the first torsional head n11;

b) the rotational speed of the second twisting head n12;

C) the number of twists per unit length of the drive TOn;

g) the number of twists per unit length of the output segment of the twisted beam KN,

The total number of spins in the Z-direction per unit length of the twisted beam in the first period of T1is:

TOand= - n12/v = - 3000/150 = - 20 1/m

The final number of twists of the twisted beam in the direction of S per unit length is:

TOS= (n11+ n22)/v = n11/v = 3000/150 = =20 1/m

Step Scrutineer 1, i.e., h1= 100 mm, the linear velocity should be increased two times, i.e., the velocity must be v = 300 m/min.

As can be seen from Fig.3 and 5, the manufacture of the twisted beam is performed with a minimum transition interval.

The above is due to the fact that the area C-d ( Lnin the moment of transition from one period of twisting to the other veins become parallel (at the transition from the first period to the second, or have a double twist at the transition from the second to the first).

The reduced speed rotation frequency of the second head (Fig.5) in the second period avoids excessive ukratko beam, at the same time to carry out the twisting lived corresponding to the dual way of twisting that with the same specifications can improve performance in two times.

1. HOW SZ-TWISTING lived cable products, which are summarized in the beam veins have between aldatzeko and receiver and when moving with a constant speed clamp located at some distance from each other two twisting points, apply the torque in each of the two points located between the twisting point, obspechivaya twist lived on ist movement lived point twisting and the second point of application of torque, remove the torque from the first point in time, ensuring the passage of the twisted conductors specified distance pieces, characterized in that at the end of the specified portion of the distance towards the second point of application of torque, the veins clamp, forming an additional point of twisting, and remove the torque from the first point simultaneously with the formation of this additional point of twisting.

2. The method according to p. 1, characterized in that simultaneously with the removal of the first torque speed reduce the angular velocity of rotation lived at the point of application of the second torque.

 

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