FR2626904A1 - PROCESS FOR MANUFACTURING COMBINED METALLIC ARTICLES SUCH AS ELECTRIC CABLES, HANDLING CABLES AND MULTIFILAR METAL ROPES - Google Patents

Abstract

The invention relates to the manufacture of clerk articles. According to the invention, a bundle of elements 1 of great length is drawn from feeder coils, a committed article 3 is formed by forcibly communicating to the bundles of elements 1 a helicodal movement, this article is advanced according to a curvilinear trajectory, a section of the article committed is forcibly rotated on a curvilinear trajectory around the axis connecting the start and the end of said trajectory, at a speed approximately twice lower than the speed of rotation of the article 3 in the area of its formation, it is wound on a winding drum 4 with creation of a tension force. In this case, while the article 3 is moving along the curvilinear path, the tension force created by the winding drum 4 is removed on it by applying a braking force to it immediately before it is wound onto the drum. 4. The invention applies in particular to the production of multi-conductor electrical cables, handling cables or multi-wire metal ropes.

Description

The present invention relates to the manufacture of articles subject to

  and relates, in particular, to a process for producing metal articles subject to the

committing or clerk.

  The present invention can be used for the production of multiconductor electric cables, handling cables made of different metallic materials as well as multi-wire metal cords in machines provided with rotary mechanisms for the admission and

traction deadits articles.

  It is very effective to apply the present

  the manufacture of thin steel cables for use in

  distance or wire ropes for teehni- articles

rubber.

  It is known a method of manufacturing metal articles committed to communicate, a beam of elements of great length, a helioYdal displacement

(DE, C, 2037607).

  This method of manufacturing cleaved metal articles consists in drawing a bundle of long-length elements of coils that are dewatered in the zone of creation of a metal article that is committed, to form this article by forcibly communicating with the beam of great items

  length, a helical displacement (in the description

  which will follow, this operation will be named commettage) and to wind the article rotating about its axis on a

winding drum.

  In the processors implementing this method, the debit reels can be mounted on a stationary common frame (power supply device). This mode makes it possible to choose, without any limitation, variants ensuring the most collected disposition of the debit reels and

  their minimal distance from the training area of a

  Clerk This is why the technological possibilities of the aforementioned machines compared to those of machines

262604V

  known tubular, are notably larger, the

  and the amount of metal needed to

  are lower. These advantages are very

  substantially to the manufacture of multi-electric cables.

  conductors and Ode thin multi-wire cables. To ensure, according to the known method, the winding

  of a committed article turning around its axis on a tam-.

  winding cap, it is necessary to rotate the winding device of a commisseuse at a speed equal to the speed of rotation of an article committed in the zone of its formation. The rotor of the winding device comprises a number of eienements (guiding of a committed article, demountable winding drum, completed finished article) which are not susceptible to precise balancing and considerably limit the speed

  permissible rotation of the rotor. That is why the performance of the

  China of this type is relatively weak. -

  There is known a method of manufacturing metal articles committed by means of double committing

(GB, A, 963424).

  The known method consists in pulling a beam of elements of great length, debiting coils, in the zone of creation of an article committed, to make the initial order of this article by communicating, of

  with a large beam of elements, a displacement

  Helicodal cement, to bring this item to the winding drum.

  ment-following a curvilinear trajectory, whose beginning and end are on the same axis so that at the end of the displacement following the curvilinear trajectory, the article changes direction of movement and moves in the

  reverse direction, to be performed - the second

  of the article by communicating, to the tronton of this article-finding on the curvilinear trajectory, a rotary displacement around

  the axis connecting the beginning and the end of the curvili-

  Finally, it is necessary to wind the article on the winding drum by creating a stress of tension. In this case, the speed of rotation of the section of the article in the area of the curvilinear trajectory is equal to the speed of its

  rotation in the initial committing area.

  The processors implement this process in

  carry a rotor with guiding elements for

  move a committed article along the curvili-

  Reign. The winding drum is mounted inside the

  rotor, on the carriage which remains stationary during operation.

  machine. Thus, it eliminates the need to balance the elements of the winding device,

  that is, increasing the permissible speed limit

  rotational speed of the rotor. In addition, the method in question makes it possible to commit a two-step article in a single turn.

  rotor (double committing). Thanks to this, the commissors

  Its type is characterized by high efficiency.

  However, the item previously committed is often

  in the course of repetitive commits to torsional deformation. In this case, the long-length elements forming the outer layers lengthen and the elements constituting the inner layers compress. In the case of the manufacture of fine multilayered articles, this operation causes the rupture of the outer elements of great length, the clearance of the interior elements beyond the surface of the article, the curvature of the longitudinal axis of tl Article. Therefore, the use of the known method is preferably limited to the manufacture of monolayer articles (articles comprising three or four elements). There is known a method of manufacturing comminuted metal articles (GB, A, 1209484), which consists in drawing

  a bundle of elements of great length

  in the zone of creation of an article committed, to

  this article by forcibly communicating to the beam of articles of great length, a

  advance this article towards the winding drum-

  following an irreversible trajectory whose beginning and end are on an axis so that at the end of the displacement

  following the curvilinear trajectory, the article committed changes

  direction of movement in the opposite direction, to be

  the section of the article in forced rotation on the trajectory

  Curvilinear, around the axis connecting the beginning and the end of this trajectory, at a speed of less than twice, at the speed of rotation of the article-in the zone of its formation, and to roll up this article on a drum

  winding by creating a tension force.

  The commissioner putting the aforementioned method into operation comprises two rotors. One of these is intended to effect the forced helical displacement of an article made in the training zone, the second rotates at a speed close to a speed of two times less than the speed of rotation of the first rotor and serves to create'the curvilinear trajectory of the advance of the article towards the winding tembour. The drum is mounted inside

  of the second rotor, on a fixed carriage.

  In this process, while a committed article is advancing along an upright trajectory under the action of the tension force, it can not freely rotate around

  its longitudinal axis. This is why, at the beginning of the trajec-

  curvilinear, the article committed is roughly

  halfway through and at the end, it returns to the initial state

  following the difference of the rotational speeds of the two rotors.

  Thus, the irregular tension of different

layers in a finished article.

  However, while moving an article

  placed along the curvilinear trajectory in a semi-detented state, the weakened elements of great length, in this case, the threads of the outer couehe, move with respect to the

  interior elements and lose their helical ini-

  tial. As a result, defects are formed in the structure

  ture that are not eliminated after the article has been returned to its original position, which is detrimental to the quality of the article. For this reason, we are obliged to limit

  the use of this process in the manufacture of multicore cables

  ductors from plastic materials such as:

aluminum, copper.

  It was therefore proposed to put a manufacturing process

  cation of metal articles committed at the point, in which the possibility of free rotation of the articles about their axis during their displacement along a trajectory

  curvilinear would improve their quality.

  The problem thus posed is solved by means of a

  11 process for the manufacture of metal articles

  to draw a beam of elements of great length, from debiting coils, to a zone of eréation of a committed article, to form this article by forcibly communicating, to the beam of elements of great length, - a displacement helical, to bring this erti-key to the winding drum following a curvilinear trajectory, whose beginning and end are on the same axis so that at the end of the depletion following the curvilinear trajectory, the article committed changes direction of movement and moves in the opposite direction, to communicate, by force, a rotation to the section of the artielie committed on the curvilinear path, along the axis connecting the beginning and the end of

  this trajectory, at a lower speed, approximately

  twice, at the rotational speed of the article

  committed in the area of his training, to roll up this article

  key on the winding drum by creating a tension force, characterized, according to the invention, in that during

  displacement of the article committed on the cur-

  uiligne, one cancels, on him, the stress of tension, created by

  winding drum, applying a braking force

  swim to this article directly before winding it on the

winding drum.

  By eliminating the tension force of the com-

  put in the area of displacement following the trajectory cur- -

  vilicate and forcibly communicating a helicoidal movement

  dal to the article in the zone of committing, according to the invention.

  In this case, the possibility of turning, itself around its axis under the effect of its own torsional rigidity (torsional regency), is eliminated, which eliminates the possibility of untwisting (deformation of torsion) of the article and the defects of strueture, in other words, it appreciably improves the quality of the article committed * It is advantageous that the braking force of the article committed is approximately between 50% and 96% of the value of the tension force erected by the

winding drum.

  This ensures the required tension of the oedmis article for its winding on the winding drum and simultaneously decreases the tension on the curvilinear path to a value allowing the article

  to turn around himself on his own axis.

  Experiments have shown that a value

  the braking force, substantially less than 50%.

  of the value of tension effort of the article committed

  ered by the winding drum, causes an instability

  the process of rotation of this article around its own axis on the curvilinear trajectory, that is, that

  friction, in the zone of displacement following the

  curvilinear jectory periodically emptied the article of

  turn around its axis and is subject to deformation

  torsion in the opposite direction to the direction of the In this case, the tension of the outer threads weakens, the threads move relative to each other and lose their initial helicoidal shape. As a result, defects form periodically in the structure of the finished article. that is to say, the quality of the article drops. After the twisting deformation of the article has

  reached the limit value of the motor torque created by the

  these friction, the article committed begins to turn around-

  turn of its axis. Torsional deformation and torque

  internal engine are decreasing- and the described process recom-

begins.

LU62604

  If the value of the braking force exceeds

  96% of the value of the tension force of the

  the clerk created by the winding drum, the proces-

  rotation of the winding drum, driven

  towards the friction coupling, becomes unstable. In this case, the wound article wound on the drum-is placed incorrectly (it is not arranged on the drum in

imposed position).

  At the moment of a brief slowing down of the rotation or a short stop of the winding drum in the area of the flight path, an inadmissible softness of the eable forms and contributes to the formation of a rotating loop at the exit of the area of committing. After the loop section of the article has reached certain dimensions, it

  clings to the elements, arranged in the vicinity of the

  China, leading to the break-up of the article and to

end of the machine.

  Thus, as is apparent from the description above,

  the process of manufacturing metal articles committed

  lized according to the invention improves the quality of this article. The invention will be better understood and other objects, details and advantages thereof will be more readily apparent.

  light of the following explanatory description of a

  mode of its realization with reference to the drawing not limited

annexed, in which:

  - the single figure represents a diagram of

tion of the recycled process.

  A long beam of elements 1 is removed.

  of the debit reels (not shown on

  sin), mounted on a stationary supply device 2 in the zone of creation of a committed article. Forming'

  article 3 by communicating a social displacement

  dal, by force, with the beam of elements 1 of great length.

  Article 3 is taken to the winding drum 4, followed by

  a curvilinear trajectory whose beginning and end

  on the same axis of maneuver as at the end of the

  Following this trajectory, the committed artiele 3 changes direction and moves in the opposite direction. We run,

  force, the section of Article 3 lying on the

  curvilinear jectory around the axis connecting the beginning and the end of this trajectory at a speed less than twice, at the speed of rotation of article 3 in the zone

  of his training. The finished article 3 is wound on the drum.

  winding 4 by creating a tension force. immediately

  before winding on the drum 4, apply

  article committed 3, a braking effort.

  The helical unfolding is made by force

  dal of a bundle of elements 1 of great length in the

  zone of formation of an article committed with the aid of a

  Traction unit 5 of the belt type or rotating chain

  at speed n. We create the curvilinear trajectory of displacement

  Article 3 by means of a tubular guide

  laire 6 gradually bent and mounted, so that it p. uisse turn at speed n / 2 on two bearings 7. The drum, winding 4 is mounted on the carriage 8, freely suspended between the bearings 7 on bearings 9 and remains stationary. A device 10 by means of which the braking force is applied in article 3 is mounted upstream of the

4. drum on the trolley 8.

  This device 10 can be made according to any

  what a known design for anaerobic purposes

  guages. The braking of the article committed 3 directly before its winding on the drum 4 decreases its tension

  while moving within the guiding

  tubular step 6 up to a value which makes it possible

  the possibility of turning itself around its axis inside the tubular guide element 6, at the

  speed n / 2. As a result, article 3 is no longer

  deformation of the section between the formation zone and the winding drum 4, which eliminates the possibility of the formation of structural defects and

  Elucidates the quality of the item committed 3.

  The value of the braking force of the article

  put 3 is chosen considering its mechanical properties and the performance of the clipper, within the limits, approximately, of 50% to 96% of the value of the stress of

  tension created by the winding drum. The higher value

  braking force is preferable. However, it should be noted that in the vicinity of this value, the quality of winding on the drum decreases as a result of the periodic stoppage of the drum usually moves in motion

  through a friction coupling. At an inferior value

  of the braking force, the process of rotating the article on the flight path becomes unstable

  the formation of defects in the structure of the article

put in place.

Example 1

  With the aid of the claimed process, a single steel wire rope is produced from twelve 30.03 mm yarns. This process is carried out on a commissioner having

  a traction mechanism, a rotor with a guiding element

  tubular frame inside which are mounted, on a

  carriage, a winding drum and a braking device

  swimming. The rotational speed of the traction mechanism is equal to 4000 rpm, while the rotational speed of

  the tubular guide element is equal to n / 2 2000 rpm.

  The cable is manufactured according to the claimed method. In this case, a braking force equal to 50% of the

  value of the tension force created by the winding drum

LEMENT.

  No defects in the cable structure were found throughout its length; moreover, the cable does not turn to

  the free state around its axis and preserves the

  line. EXAMPLE 2 The claimed process

  double strand steel cable, from seven to-

  beforehand, each one, from seven threads of 0.07 mm diameter. - The process is carried out on a similar commisseuse

to that described in Example 1.

  We then choose the value of the tension force

created by the winding drum.

  In a finished cable, no structural defect has been located all along its length, and the free-form cable does not rotate about its axis and keeps the rectilinear shape.

Example 3

  Using the claimed process, a metal rope is made by double stranding from strands.

  each having three wires of 0.15 mm diameter. -

  The process is carried out with the aid of the committer

  similar to that used in Example 1.

  In this case, a value of the braking force equal to 80% of the value of the tension force is chosen.

  created by the winding drum.

  No defects in the structure of the finished cable were found. in all its length, and, moreover, in the free state, it does not turn about its axis and keeps its rectilinear form.

  The claimed process for the manufacture of articles

  Cleaved metal keys can be used to shape wires from dif--

  diameters, to manufacture cables of different

  types and using different modes of committing.

  The proc-ed claimed manufacture of metal items committed is for the manufacture of cables

  steel ends and wire ropes.

  This process offers. usability = efficient multi-wire drawing trains and advanced committing technology. In addition, the use of the claimed process makes it possible to reduce the cost price of

product from 6 to 12,%.

Claims (2)

R E V E N D I C A T IO N S   1. A method of manufacturing metal articles, consisting of drawing a bundle of long elements of debit reels in a creation zone of a committed article, to form this article by forcibly communicating with the beam of elements of great length, a helical displacement, to bring this article to a winding drum following a curvilinear trajectory, whose beginning and end are on the same axis so that at the end of the displacement along this trajectory, the committed article changes direction and moves in the opposite direction,   to communicate, by force, a rotation to the section of the   it is committed, on the curvilinear trajectory, around the axis connecting the beginning and. the end of the trajectory, at a lower speed, approximately twice the speed of rotation of the article taken in the zone of its formation and to wind this article on the winding drum by creating a tension force, characterized in that during the displacement of the article clerk (3) on the curvilinear path, the tension force created by the winding drum (4) is canceled on it by applying a braking force to this article (3) directly to its winding on the winding drum (4).   2. Method according to claim 1, characterized in   ee that the value of the braking force of the armature   article committed (3) within the limits of approximately 50% to 96% in relation to the value of the tension force created ' by the winding drum (4).