FR2585271A1 - METHOD AND MACHINE FOR PRODUCING A WORKPIECE HAVING A PLANE WIRE IN METAL WIRE - Google Patents

Abstract

The invention relates to a method and a machine for producing a part 1 comprising a flat coil 2 made of metal wire, of the type in which one starts from a section of wire and is wound around a chuck 7 for FORM SPIRE 2, IN WHICH IS ALSO MADE WITH THE WIRE AT LEAST ONE, OR PART OF A LOOP 4 OR SIMILAR TERMINAL AND CENTRAL.

Description

Method and machine for producing a part comprising a turn

flat in wire.

  The invention relates to a method and a machine for making

  sation of a part comprising a flat turn in metal wire. We already know a process and a machine for making

  parts comprising a flat wire spiral.

  In this known process, we start with a section of wire and wind it around a mandrel to form the turn. A machine for implementing this method comprises a winding means making it possible to produce the turn and means for feeding a section of wire placed against or near the external surface of winding of the mandrel. This process and this machine are essentially intended for the production of springs and more particularly of helical springs (French patent No. 2,180,010). Optionally, these springs may include a terminal hook loop

  carried out in a phase distinct from that of the realization

  of the turns themselves. A method and a machine are also known for producing springs.

  helical dishes by rolling (European Patent No. 44,464).

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  These known methods and machines are of very specific application but are not suitable for the production of a part comprising a flat turn connected to a central loop at least substantially coplanar and coaxial with the turn, intended to rigidly maintain

a section of wick.

  The invention therefore aims to propose a method and a ma-

  china to make such pieces.

  The method according to the invention is characterized in that the wire is wound around a mandrel to form the turn, and at least one or part of a terminal and central loop or the like is also produced with the turn. According to other characteristics of the process, a section of wick is rigidly associated with the loop.

  or similar; we realize the turn and the simulated loop

  temporarily and in a single operation. The loop is made by winding the wire around a pin

main.

  A machine according to the invention which comprises a trunnion and means for feeding a section of wire placed against or near the external winding surface of the mandrel also comprises means for producing with the wire at least one or a part of '' a loop or similar, terminal and central, these means being

  placed in or to the right of the ceptral area of the mandrel.

  The method and the machine according to the invention therefore make it possible to produce a composite part consisting, on the one hand, of a metal wire element, the coil of which forms a foot and the loop an attachment member for a second

  wick element held by the loop perpendicular to

  lairement to the plane of the turn. Such a room is

3 Z 2585271

  used in particular in the manufacture of candles

  lighting or decorative of the type comprising a re-

  ceptacle in which said part is placed then is

pouring paraffin.

  The invention will be clearly understood from the description

  which will follow with reference to the accompanying drawings in which:

  - The candles at 1 o'clock are eight schematic views illus-

  tring the different operating phases of the process.

  - Figure 2 is a schematic perspective view

  of a part obtained by the implementation of the method.

  - Figures 3, 4, 5 and 6 are four schematic views respectively, from the right side, from above, from the left side

  and rear, of a machine according to the invention.

  - Figures 7a, 7b, 7c, 7d, 7e and 7f are six views

  diagrams from above illustrating the phase of realization

  simultaneous positioning of the coil and the loop

  as well as the chuck and the fork of the machine.

  - Figures 8a, 8b, 8c, 8d, 8e are five schematic views

  larger scale ticks illustrating more precisely

  the looping phase and the solida-

wicking.

  - Figures 9 and 10 are two schematic views, respectively from above and from the side, of the means

  wire feed and related means.

  - Figures 11 and 12 are two schematic views,

  front and side respectively of the supply means

  wicking mentation and related means.

4 2585271

  - Figure 13 is a top view of the mandrel of the

machine according to the invention.

  - Figure 14 is an elevational view of the mandrel of Figure 13. - Figures 15 and 16 are two schematic sectional views of the mandrel of Figure 13, respectively according to

lines 15-15 and 16-16.

  - Figures 17 and 18 are two schematic views, respectively above and in elevation, illustrating the means for driving the mandrel and the fork

  and its means of rotation and retraction.

  - Figures 19 and 20 are two schematic views, respectively from above and in elevation, illustrating

the clamp of the clamping means.

  - Figures 21 and 22 are two schematic views, respectively from above and in elevation, illustrating the wick supply means and the mandrel in their

  respective positions of cooperation.

  The invention relates to a method and a machine for

  reading of a part 1 comprising a flat turn 2 made of metal wire connected by a spoke 3 to a loop

  terminal and central 4 rigidly maintaining a section

  wick lesson 5 which, once part 1 has been produced,

  has its axis 5a placed at least substantially perpendicular to

rement at plane P of coil 2.

  The first element of the part 1 comprising the turn 2, the radius 3 and the loop 4 is made of metal wire for example of the order of a millimeter in diameter, this wire N- being sufficiently malleable to be deformed and to keep the deformation which was given to him. The wick 5 can be a candle wick but also, for other applications, a cord, a strip, a braid of thread, a thread, a filament, etc. This wick can have a diameter of between about a millimeter and about a centimeter. Preferably, the section

  wick 5 has a certain hold and is self-

  wearing. The coil 2 can have a diameter between the centimeter or a few centimeters up to ten centimeters. Wick section 5 can

  have a length between around one hundred-

  meter and around ten centimeters.

  Preferably, the section of wick is associated by one of its free end portions with the loop 4. In a preferred embodiment, the

  coil 2 is an open circular coil of 330.

  However, the invention also applies to the case of turns of different shapes, closed and comprising

possibly several turns.

  In the method according to the invention, we start with a section of wire 6 (FIG. 1c) and we wind it around a mandrel 7 to make the coil 2. But, we also carry out with the section of wire 6 at least one or part of a loop 4 or similar, terminal and

central (Figure lf).

  The section of wick 5 is rigidly associated with the loop 4. Preferably, this association is made with an extreme free part 8 of the wick section 5. This association is made so that

  the wick section 5 is at least substantially perpetual

perpendicular to plane P of coil 2.

  According to the invention, the turn 2 and the loop 4 are produced.

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  simultaneously and by a single operation.

  Preferably, the loop 4 is produced by

  rolling of the wire section 6 around a main journal 9a. The wick section 5 is associated with the loop 4 in two stages, namely, a first step in which the wick section 5 is placed in the loop 4 formed but not tight (Figure 8c) and a second step in which it is tightened loop 4 on the section

wick 5 (Figure 8d).

  In the process, we therefore first bring the section of

  wire 6 radially opposite a channel 10 of the mandrel 7.

  Then, the wire section 6 is made to penetrate the channel 10 until its anterior free end 11 exceeds the main pin 9a by the length

  necessary to make the loop (Figure 7a).

  Finally, the section of wire 6 is maintained with the possibility of sliding by supply means 12 against or near the outer winding surface 13 of the

mandrel 7 (Figures 7c to 7f).

  More specifically, the anterior free end II of the wire section 6 is passed through a slot 9b formed by the main journal 9a and a journal

  counterpart 9c, the assembly forming a fork 9d.

  During the operation of making the turn 2 and the loop 4, the section of wire 6 is locally maintained fixedly on the mandrel 7 between its anterior and posterior parts which, wound, will form the loop 4 and the turn 2 respectively (Figure

the).

  To hold the wire section 6 fixedly on the handle

  drin 7, before carrying out the turn 2 and the loop 4, a small relative rotation of the fork 9d and of the mandrel 7 is carried out, so as to wedge the wire in the mandrel at the interior outlet

a of its channel 10 (Figure 7b).

  This relative holding rotation is equal to or on the order of 20 to 40, and preferably on the order of 30. Preferably, in the relative holding rotation, the fork 9d pivots and the mandrel 7 remains fixed. According to the invention, the operation of making the turn 2 and the latch 4 consists of a relative rotation of the mandrel 7 with respect to, on the one hand, the fork 9d and, on the other hand, the means of wire feed 12

  (Figures 7d to 7f). This relative winding rotation-

  is in the opposite direction to the relative rotation of hand-

  yours previously mentioned. The relative winding rotation is equal to a part of one or at least

  a lap. Preferably the relative rotation of

  bearing is equal to or on the order of 270 to 360, and

  in particular of the order of 320 to 340, a preferred value

  differential being 330. In the relative rotation of

  bearing, the fork 9d and wire feed means 12 remain fixed, while the mandrel 7 pivots around

of its axis.

  To arrange the section of wick 5 in the loop 4, an axial relative sliding (along the axis 5a) of the mandrel 7 and of the section of wire 6 which it supports and of wicking means 14 is carried out, in the

sense of closeness.

  We now refer to Figures 1a to 1H.

  In general, we start with wire and wick

  strips on reels and using cutting means respectively

  With the wire and the wick 15, 16 (Figures la and lb), the wire sections 6 and the wick sections 5 are produced (Figures lc and ld). Then, the section of wire 6 is brought into the mandrel 7, as mentioned previously, while the section of wick 5 remains awaiting the completion of the loop 4. Once the section of wire 6 placed in the mandrel 7, we performs local maintenance as previously indicated (Figure le). Then, the loop 4 and the coil 2 are produced simultaneously and in a single operation (FIG. 1f). We will come back in more detail to this

surgery.

  The section of wick 5 is then placed in the loop thus formed but not yet tightened (Figure lg). In this phase, we continue to maintain the wick section 5. Then, we tighten the loop 4 on the wick section

using pliers 17 (Figure 1h).

  We now refer to Figures 7a to 7e and 8a to 8e.

  Figure 7a corresponds to the position of the wire section 6 in the mandrel 7 in the initial state. The wire section 6 is placed in a straight line and penetrates through its part

  anterior in the channel 10 of the mandrel 7 while exceeding

  sant the slot 9b of the length necessary for the realization

  tion of the loop 4. Then (Figure 7b), the

  holding by jamming the section of wire 6 in the man-

  drin by rotating the fork 9d clockwise about 30, the chuck 7

  remaining fixed. It follows the local deformation of the section

  thread lesson 6 and the realization of a double elbow 18

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  (Figures 8a to 8e) and therefore maintaining the wire section 6 in the central hollow 19 of the mandrel 7. However, on either side of the double elbow 18 (and outside the channel 10 in which it is trapped), the wire section 6 remains free so that it can be wound and

  form coil 2 and loop 4.

  Then, gradually, the turn 2 and the loop 4 are made simultaneously in a single operation thanks to the relative winding rotation. The section of wire 6 can slide in the supply means 12 and be applied progressively to the exterior surface

  winding 13. Figures 7c, 7d and 7th correspond to

  tooth at three intermediate stages of this rotation

relative winding.

  The fork 9di and in particular the main journal 9a-

  remaining fixed while the mandrel 7 pivots about its axis 7a, and the wire section 6 being held by the channel 10 is therefore driven by the mandrel 7, it follows that the relative rotation leads to achieve thanks to the presence of the counterpart journal 9c a loop around the main journal 9a. The counterpart journal 9b has the function of applying

  the wire section 6 against the main pin 9a.

  As can be seen in Figure 7a, initially, the slot 9b is placed opposite the interior outlet

  has channel 10, which allows without difficulty the penetration

  tration of the wire section 6 in this slot 9d.

  The fork holding rotation 9d preferably occurs around the main pin 9a so that at the end of the winding phase (Figures 7e and 8a) the wire section 6 is not

  hindered by the counterpart journal 9c.

  Then, the fork 9d or at least the main pin 9a is retracted (Figure 8b) which frees the center of the loop 4. It is then possible to place the section of wick 5 in particular its free end 8 ( Figure 8c). This installation is made possible taking into account that the loop 4 is not tightened on the section of wick 5, a certain play existing between them. Then tighten the loop 4 on the section of wick (Figure 8d) with the clamp 17 which is then

open and retracted (Figure 8e).

  A machine for producing a part 1, by implementing the method which has just been described, is

  shown as a whole in Figures 3 to 6.

  This machine mainly comprises a sub-assembly for supplying a section of metal wire comprising the wire feeding means 12 and the wire cutting means 15; a sub-assembly 21 for supplying a section of wick comprising the means for supplying a section of wick

  wick 14 and the wick cutting means 16; a coin-

  assembly 22 for producing the part 1 comprising the mandrel 7, the fork 9d and the clamp 17 and the function of which is to produce the turn 2, the loop 2 and the rigid association of the section of wick 5 in the loop 4; and finally, an evacuation sub-assembly 23

parts 1 produced.

  The evacuation sub-assembly 23, which is not in itself part of the invention, may comprise means 23a for gripping the parts 1 produced, such as a clamp,

  and conveyor means 23b such as a conveyor belt.

  In this case, the sub-assembly 20 is preferably placed horizontally and above the conveyor belt 23b,

  transversely to it.

  The sub-assembly 21 is placed vertically and plumb with the edge of the conveyor belt 23b on the opposite side where the sub-assembly 20 is placed. The sub-assembly 22 is placed directly above and below the sub-assembly 21, just above the treadmill 23b. The means of seizure 23a

  are placed opposite the mandrel 7 of the sub-assembly 22.

  The machine according to the invention which therefore comprises a winding mandrel 7 making it possible to produce the coil 2 and means for feeding wire 12 placed against or near the external winding surface 13 of the mandrel 7. It also comprises means 7, 9d, for carrying out with

  the section of wire 6 at least one or part of a bou-

  clette or similar, terminal and central. These means are placed in or to the right of the central area of the

chuck 7.

  The machine also comprises the means for bringing in section of wick 14 coming in correspondence with the means 7, 9d for producing the loop 4 and means for rigid association 17 of the section of wick 5 with the

loop 4.

  The mandrel 7 comprises a channel 10 at least substantially radial, the external outlet 10b of which opens into the winding surface 13 and the internal outlet 10a of which opens into a central recess 19 in which the means for producing the loop and in particular the

fork 9d.

  The fork 9d (Figure 18) has a main journal 9a around which the wire section 6 is wound to form the loop 4 and a counterpart journal 9c now

  the wire to ensure its deformation by and around the whole

  main rillon 9a. The two pins 9a and 9c define

12 2585271

  i2 a slot 9b. The machine comprises means for retracting the main pin 9a from the central hollow 19. These

  retraction means are in particular sliding means

  axially of the main pin 9a in the direction of the spacing of the mandrel 7. These sliding means

  may consist, for example, of a pneumatic cylinder.

  The machine also includes holding means

  local wire section 6 fixedly on the mandrel 7.

  These local holding means comprise means of relative rotation 25 of the fork 9d relative to the mandrel 7. These relative rotation means 25 can be means of pivoting of the fork 9d about the axis of the main journal 9a of the type comprising

a gearmotor or a jack.

  The machine also includes means for relative rotation of winding 26 of the mandrel 7 with respect, on the one hand, to the wire feeding means 12 and, on the other hand, to the fork 9d. These relative winding rotation means 26 are means for pivoting the mandrel 7 about its axis 7a. These means consist, for example, of a toothed ring 26a integral with the mandrel

  7 driven by a toothed bar 26b (Figures 17 and 18).

moved by a jack 26c.

  The means of rigid association of the section of wick 5 with the loop 4 essentially comprises a clamp 17 whose jaws 17a pass through a lumen 27

  of the mandrel 7, this lumen 27 passing through the central hollow

tral 19.

  The clamp 17 is mounted movable as a whole, the machine comprising retraction means 28 of the

clamp 17 of the mandrel 7.

  The opening and closing of the clamp are carried out, for example, by means of a pneumatic cylinder 29, the two jaws 17a being mounted articulated on a part

  support 30 pivotally mounted about an axis 30a ortho-

  gonal to the axis 7a and driven around the axis 30a by drive means such as a jack 28a

(Figures 19 and 20).

  The mandrel 7 is limited at its upper part by a table 31 in which the channel 10 and the central hollow 19 are hollowed out. The channel 10 preferably goes into

  widening towards its external exit lOb (Figure 13).

  The outer winding surface 13 is itself constituted by a peripheral recess of the table 31. The mandrel 7 has in the center a hole 32, located in the central recess 19, communicating with the lumen 27, allowing the passage of the fork 9d and jaws 17a. The mandrel 7 also includes a foot 33 terminated by a base 34 allowing the mandrel to be fixed on a rotary table 35 (Figure 18). The hole 32 extends into the foot 33 and the base 34. Slots 36 formed in the foot 33 and the base 34 allow the passage of the jaws 17a and in particular their opening as well as their

  closing and moving them for retraction.

  The wire feeding means 12 comprise a channel 12a drilled in a support piece 12b so as to allow the wire to be held while allowing it to slide

when needed.

  The wire feeding means 12 are associated, in the sub-

  set 20, with upstream and downstream means of feeding

  yarn in the form of coils 37; the wire cutting means 15 and means for placing the section of wire under

  rectilinear shape as well as wire transfer.

  The sub-assembly 20 can therefore comprise (FIGS. 9 and 10) a frame 38 on which is slidably mounted a first

  carriage 39 by means of a first jack 40, this first cha-

  riot 39 comprising a channel 39a crossed by the wire, with which the locking rod 41 of a jack 41a cooperates with said first carriage 39. The first carriage 39 is movable between an initial position closest to the supply means 37 and a position

  terminal closest to the cutting means 15.

  The cutting means 15 may include a knife 15a

  driven by a jack 15b carried by the frame 38.

  The frame 38 also supports a second carriage 42 cons-

  titling the support part 12b. This second carriage is mounted to slide thanks to a second jack 43. The second carriage is mounted to slide between an initial position close to the means close to the knife 15a and an end position close to the mandrel 7. With the channel 12a cooperates the locking rod 44 d a jack 44a carried by the second carriage 42. Means 45 ensure the synchronization of the movement of the first carriage 39, of the first jack, of the blocking jack 41a, of the second carriage 42, of the second jack 43, of the blocking jack 44a and of cylinder 15b

associated with the knife 15a.

  The means for supplying the section of wick 14 comprise a channel 14a pierced in a part 14b. This piece 14b

  which is part of the sub-assembly 21 is slidably mounted

  health vertically on a frame 46 thanks to a jack 47.

  The part 14b comprises a slot 14c with which a finger 48 pivotally mounted thanks to a jack 49 cooperates, the function of which is to allow the wick section to be wedged

5 in channel 14a.

  On the frame 46 are also mounted the wick cutting means 16 comprising a knife 16a displaced by a

cylinder 16b.

  Finally, on the frame 46 is also mounted a carriage 50 comprising a slot 51 in which passes a finger 52 driven by a jack 53 so as to be able to wedge the wick in the slot 51. A non-return pawl 54 mounted on the carriage 50 allows 'prevent the wick section 5 from escaping from the slot 51. The carriage 50

  is slidably mounted vertically thanks to a jack 55.

  As before, control means make it possible to synchronize the movements of the jack 47, of the jack 49,

  cylinder 16b, cylinder 53 and cylinder 55.

  Above is preferably placed a block 56 for stiffening the wick (in the case of a wick impregnated with paraffin). Above block 56 is a return pulley 57 over which the drill bit passes

  from wick feed means 58.

  As can be clearly seen in Figures 21 and 22, the channel 14a whose axis corresponds to the axis 5a of the drill bit 5 is placed perfectly in line with the main journal 9a. To avoid any adjustment problem, the main journal 9a is preferably mounted fixed.

  (with the exception of the sliding allowing its retraction).

  Consequently, the wick supply means 14 bring the free end portion 8 of the wick section 5 which projects from the channel 14a of the part 14b to the right and then into

the loop 4.

Claims (37)

  1. Method for producing a part (1) comprising   as a flat turn (2) in metallic wire, of the type in   which we start with a section of wire and we wind it   ci around a mandrel (7) to form the turn (2), characterized in that one also carries out with the wire at least one or part of a loop (4) or similar terminal and central.   2. Method according to claim 1, characterized in that rigidly associated with the loop (4)   a section of wick (5) or the like.   3. Method according to any one of the claims   1 and 2, characterized by the fact that the   turn (2) and the loop (4) simultaneously.   4. Method according to any one of the claims   1 to 3, characterized by the fact that the   turn (2) and the loop (4) by a single operation.   5. Method according to any one of the claims   1 to 4, characterized in that the loop (4) is produced by winding the section of wire (6)   around a main journal (9a).   6. Method according to any one of the claims   tions 1 to 5, characterized in that the wick section (5) is associated with the loop (4) in two stages, namely, a first step in which the wick section (5) is placed in the loop (4) formed but not tight, and a second step in which   tighten the loop (4) on the section of wick.   7. Method according to any one of the claims   1 to 6, characterized by the fact that first 17 2585271   the wire section (6) radially opposite a channel (10) of the mandrel (7); then we penetrate the section   wire (6) in the channel (10) until its ex-   anterior free end (11) exceeds the main pin (9a) by the length necessary for the realization of the loop (4); then the wire is maintained with the possibility of sliding by supply means (12) against or near the outer surface winding (13) of the mandrel (7).   8. Method according to claim 7, characterized   by the fact that we pass the free end ante-   lower (11) of the section. wire (6) in a slot (9b) formed by the main journal (9a) and a journal   counterpart (9c) forming a fork (9d).   9. Method according to any one of the claims   1 to 8, characterized in that during the operation   ration for making the turn (2) and the loop (4), the wire is held locally fixedly on the mandrel (7) between the parts which, wound, will form   respectively the turn (2) and the loop (4).   10. Method according to claim 9, characterized   by the fact that to maintain the section of wire -   (6), fixedly, on the mandrel (7), a small relative rotation of the fork (9d) relative to the mandrel (7) is carried out, prior to the production of the turn (2) of the loop (4). so as to wedge the section of wire (6) in the mandrel (7) to   the interior outlet (10a) of the channel (10).   11. Method according to any one of the claims.   tions 9 and 10, characterized in that the rotation   relative holding is equal to or on the order of 20 to 400.   12. Method according to any one of the claims   tions 9 to 11, characterized in that in the rotation   relative holding position the fork (9d) pivots and the mandrel (7) remains fixed.   13. Method according to any one of the claims   tions 1 to 12, characterized in that the operation for producing the turn (2) and the loop (4) consists of a relative rotation of the mandrel (7) relative to, on the one hand, the fork ( 9d) and to, on the other hand, the supply means (12).   14. Method according to any one of the claims.   tions 1 to 13, characterized in that the relative winding rotation is in the opposite direction to the rotation relative holding.   15. Method according to any one of the claims   tions 13 and 14, characterized in that the relative winding rotation is equal to part of one, or at least one round.   16. Method according to any one of the claims   tions 13 to 15, characterized in that the relatively winding rotation is equal to or of the order of   270 to 360, and in particular of the order of 320 to 340.   17. Method according to any one of the claims ----   tions 13 to 16, characterized in that in the relative winding rotation the fork (9d) and the supply means (12) remain fixed and the mandrel (7) pivots.   18. Method according to any one of the claims.   1 to 17, characterized in that to have   the section of wick (5) in the loop (4),   kills an axial relative sliding of the mandrel (7) and of the section of wire (6) which it supports and of the feeding means   of the bit section (14) in the direction of approximation.   19. Machine for producing a part comprising   as a flat coil (2) of metallic wire of the type   carrying a winding mandrel (7) making it possible to react   read the turn (2) and the means of supply (12) of the section   lesson: wire placed against or near the surface   outside (13) for winding the mandrel (7),   laughed at by the fact that it also comprises means for producing with the thread at least one or part of a loop (4) or the like, terminal and central,   placed in or to the right of the central zone of the mandrel (7).   20. Machine according to claim 19, characterized in that it also comprises means   of wick section feed (14) coming in correspondence   dance with the means (7, 9d) for producing the loop (4) and rigid association means of the section of wick (5) with the loop (4).   21. Machine according to any one of the claims   19 and 20, characterized in that the mandrel (7) comprises a channel (10) at least substantially radial whose external outlet (10b) opens into the winding surface (13) and whose internal outlet (10a) opens in a central hollow (19) in which are   placed the means (9d) to make the loop (4).   22. Machine according to any one of claims   19 to 21, characterized in that the means for producing the loop (4) are in the form of a fork (9d) comprising a main pin (9a) around which the wire section (6) is wound form the loop, and a counterpart journal (9c) holding the wire to ensure its deformation by and around the main journal (9a), the main (9a) and secondary (9c) journals defining a   slot (9b) placed at least at the start of the operating cycle   operation of the machine opposite the internal outlet lower (10a) of the channel (10).   23. Machine according to any one of the claims.   tions 19 to 22, characterized in that it comprises means for retracting (24) the main journal (9a)   of the central hollow (19) of the mandrel (7).   24. Machine according to any one of the claims.   tions 19 to 23, characterized in that it comprises means for relative rotation of winding of the mandrel (7) relative, on the one hand, to the wire feeding means   (12) and, on the other hand, the fork (9d).   25. Machine according to claim 24, characterized   by the fact that the means of relative rotation of winding   Lement are means for pivoting the mandrel 7.   26. Machine according to any one of claims   19 to 25, characterized in that it includes means for locally maintaining the section of wire (6) fixedly on the mandrel (7) between the parts of the section of wire which, wound, will form the turn (2) respectively and the loop (4).   27. Machine according to claim 26, characterized in that the means for locally maintaining the section of wire (6) on the mandrel (7) comprise means for relative rotation of the fork (9d) relative to the mandrel (7).   28. Machine according to claim 27, characterized in that the relative holding rotation means are means for pivoting the fork (9d).   29. Machine according to any one of the claims.   tions 19 to 28, characterized in that the rigid means of association of the section of wick (5) with the loop (4) comprises a clamp (17) whose jaws   (17a) pass through a lumen (27) of the mandrel (7) pouring the central hollow (19).   30. Machine according to any one of the claims.   1 to 29, characterized in that the clamp (17)   is mounted mobile as a whole, the machine comprises   both retracting means (28) of the clamp (17) of the mandrel (7).   31. Machine according to any one of the claims.   tions 19 to 30, characterized in that the channel (10)   goes widening towards its external exit.   32. Machine according to any one of the claims.   tions 19 to 31, characterized by the fact that the wire section feeding means (12) comprise a channel (12a) pierced in a support part (12b) so as to allow the wire section (6) to be maintained while allowing his sliding when necessary.   33. Machine according to any one of the claims.   tions 19 to 32, characterized in that the means for feeding the section of wire (12) are associated with upstream downstream of the wire supply means (37) in the form of coils, cutting means ( 15) wire of the desired length, means for setting the section wire (6) in rectilinear form.   34. Machine according to any one of the claims.   tions 32 and 33, characterized in that the part   support (12b) is slidably mounted perpendicular-   ment to the axis (7a) of the mandrel (7) between the latter and the cutting means (15).   35. Machine according to any one of the claims.   tions 19 to 34, characterized in that the wicking means (14) comprise a channel (14a) pierced in a support piece (14b).   36. Machine according to any one of the claims.   tions 19 to 35, characterized in that the part (14b)   wick holder comprises removable means of hand-   yours (48, 49), the support part (14b) being mounted   smoothing parallel to the axis (7a) of the mandrel and to right of the main journal (9a).   37. Machine according to any one of the claims.   tions 19 to 36, characterized in that the wick supply means (14) are associated with, from upstream to downstream, wick supply means (58) in the form of coils, cutting means for wick (16) of desired length, a carriage (50) mounted to slide and comprising a locking finger (52) cooperating with a slot (51).