Module for the deep redrawing of metal end pieces and machine comprising at least one module

Abstract

The invention relates to a redrawing module comprising a driving plate (2) coupled to a gear motor centred on a central axis (Z) and rotated about a central axis of rotation (A); a rotary cylinder centred on the central axis (Z) and rotated about the central axis (Z) by the gear motor, comprising a punch-bearing press (31) and a die-bearing ring (33), each punch (32) being movable in translation parallel to the central axis (Z) and being coupled to the driving plate (2) by one of its ends. The redrawing module further comprises means for adjusting the angle of inclination (α) of the axis of rotation (A) of the driving plate (2) relative to the central axis (Z).

Description

[0001] DEEP RE-DRAWING MODULE FOR METAL TIPS, AND

[0002] MACHINE COMPRISING AT LEAST ONE MODULE

[0003] Technical field

[0004] The present invention relates to a machine for deep redrawing of metal tips. Such stamped parts can, for example, be used in the production of containers, closure or over-capping means, etc.

[0005] Prior art

[0006] Deep redrawing of a metal tip (or blank or rough part) consists of shaping a pre-drawn blank by the action of a tool, such as a punch coupled with a blank holder, forcing the tip to penetrate a die. The pre-drawn blank, in the form of a cup, can undergo one or more successive redrawings, but retains its initial thickness and remains smooth on the surface.

[0007] The successive deep redrawings of thin metal blanks are generally carried out using a so-called "continuous kinematic" machine consisting of one or more rotating barrels mounted in series, mechanically synchronized by blank feed devices and redrawn blank transfer devices, in the form of star wheels. For example, the machine may be composed of two barrels in series, namely a so-called "reworking" barrel, followed by a so-called "finishing" barrel. Each barrel includes slides carrying tools mounted directly above a die-holder plate, and the barrels are rotated by means of gears coupled to a single reduction motor.A rough input star wheel for successively feeding rough to the recovery barrel is positioned upstream of the recovery barrel, and a rough transfer star wheel is positioned between the barrels to transfer the rough from the recovery barrel to the finishing barrel. In practice, the supply of rough into the star wheels generates a jerky movement accompanied by shock of the rough arriving in a cell of the star wheel, which can lead to a risk of poor reception of the rough in the cell and variations in the feed speed of the rough file which are detrimental to good regularity of operation and therefore limiting as to the rate of absorption of the rough by the barrels. Furthermore, the synchronization between the barrels and the star wheels is obtained by a set of synchronous belts.Thus, the various movements or displacements of the different moving parts of the installation, as well as their synchronization, are generally controlled via mechanical means which require tedious adjustments.

[0008] Furthermore, the stroke of the slides, which is defined by the deepest tips in the range to be stamped, is fixed during the manufacture of the machine and cannot be modified to adapt the machine to another range.

[0009] Statement of the invention

[0010] The present invention therefore aims to propose a more advantageous solution for the re-stamping of tips, of simple structure and which does not require tedious adjustments.

[0011] The invention aims in particular to propose a more efficient, modular, compact, easy-to-install solution, which makes it possible to set up a single-barrel or multi-barrel stamping line depending on the number of intermediate passes required or the desired production.

[0012] The invention thus relates to a module for deep redrawing of cylindrical metal tips, for example made of aluminum, the drawing module comprising:

[0013] - a fixed frame comprising a horizontal table forming a main surface and carrying a central reference axis perpendicular to said main surface;

[0014] - a circular inductor plate coupled to a geared motor centered on the central axis, and driven in rotation around a central rotation axis;

[0015] - a rotating barrel centered on the central axis and driven in rotation around the central axis by the geared motor, the barrel comprising a slide-holder turret and a die-holder ring centered on the central axis, the slides being arranged around the central axis parallel to each other, each slide being movable in translation parallel to the central axis and being coupled to the inductor plate by one of its ends, the other end of the slide being provided with a stamping tool, such as a punch coupled to a blank holder, positioned vertically above one of the dies. According to the invention, the redrawing module further comprises means for adjusting the angle of inclination of said axis of rotation of the inductor plate relative to said central axis.Adjusting the inclination of the induction plate thus allows adjustment of the slide stroke to a minimum compatible with the height of the blanks to be redrawn and the required redrawn depth, while maintaining an optimal active working angle.

[0016] In practice, the geared motor can be a constant torque, variable speed geared motor.

[0017] Advantageously, these means for adjusting the angle of inclination comprise at least one stirrup plate comprising a support portion carrying the geared motor and from which the two arms of the stirrup extend. The support portion is pivotally mounted on the frame around a horizontal pivot axis, this pivot axis extending parallel to the main surface and being perpendicular to the central axis. In addition, the end of each arm is removably fixed to the frame. Thus, the modification of the angle of inclination of the inductor plate is carried out by changing the position of the arms relative to the frame.

[0018] According to one variant, each arm of the stirrup can be fixed to the frame by means of a strap whose length corresponds to a predefined angle of inclination of the inductor plate, and more precisely of its axis of rotation. Thus, by interchanging straps of different lengths, it is possible to modify the angle of inclination of the inductor plate. According to another variant, each strap can comprise several points of attachment to the frame, each point of attachment corresponding to an angle of inclination of the axis of rotation of the inductor plate. According to another variant, it is possible to provide several points of attachment of the arms on the frame, each of the points of attachment corresponding to a predefined angle of inclination of the inductor plate.

[0019] In operation, each of the slides coupled to the inductor plate moves towards or away from the die-holder ring depending on their angular position on the inductor plate. The angle of inclination of the rotation axis of the inductor plate thus fixes the travel of the slides, and adjusting the inclination of the inductor plate therefore allows optimal adjustment of the travel of the slides. In practice, in the case of a redrawing line consisting of several drawing modules mounted in series or in parallel, the travel of the slides can be different between two barrels and can be optimized for each redrawing module by simply modifying the inclination of its inductor plate. The possibility of adjusting the travel of the slides of each barrel to a minimum offers a saving in production time.As an indication, the inventors estimate a production gain, per active slide, of 45% for blanks to be stamped with a length (or depth) of 60 mm, and a production gain, per active slide, of 350% for blanks to be stamped with a length (or depth) of 25 mm.

[0020] Each slider is advantageously coupled to the inductor plate via an articulated means, such as a connecting rod, configured to transmit to said slider a sinusoidal translational movement parallel to the central axis, during rotation of the inductor plate. The drawing depth of the sliders can be adjusted by lengthening or shortening the connecting rods.

[0021] Usually the travel of the slide is defined between a position called "top dead center" and a position called "bottom dead center". In practice, the rotation of the inductor plate and the movement of the slides are preferably synchronized so that the introduction of a tip into a die (and therefore the introduction of a tip into a cell) coincides with the positioning of the slide at its top dead center. Furthermore, the ejection of the re-stamped tip for transfer to another re-stamping module is preferably carried out when the corresponding slide is at its top dead center, and the final ejection of the tip having undergone a final pass is preferably carried out when the corresponding slide is at its bottom dead center, and preferably by air jet.

[0022] In one variant, the barrel can carry nine slides. In this variant, the pitch diameter of the barrel can be 320 mm. This variant offers a compact redrawing solution with optimal redrawing speed without tearing. In another variant, the barrel can carry 12 slides.

[0023] In practice, the rotation axis of the inductor plate and the central axis converge at the center of the inductor plate. An articulated constant velocity transmission can be implemented to ensure the mechanical coupling between the geared motor carrying the rotation axis and the slide turret carrying the central reference axis. The inductor plate and the barrel are both independently coupled to the geared motor, for example via an Oldham type coupling.

[0024] According to one embodiment, the re-stamping module may further comprise:

[0025] - a circular selector plate with external teeth, centered on the central axis and secured to the die-holder crown, the selector plate comprising sockets for receiving tips defined between the successive teeth, the internal surface of each socket being configured to envelop the external surface of a cylindrical tip over an angle portion close to 180°. Thus, advantageously, the internal surface of each socket is of semicircular shape and is thus configured to envelop the external surface of a cylindrical tip over 180°. In practice, each socket is positioned directly above a die.

[0026] The selector plate is thus configured to receive and correctly position the blanks directly above the dies so as to allow the blanks to be stamped under optimal conditions. The selector plate could also be configured to allow for direct supply of blanks to the barrel, so as to save the use of a star wheel upstream or downstream of the barrel, and therefore complex mechanical synchronization means and tedious maintenance.

[0027] Thus, the external profile of the selector plate between two successive tooth tips advantageously has a concave hemicircular portion (or facing towards the outside of the plate) forming the hollow of the tooth and therefore the tip receiving socket, and a convex (or facing inwards) curved portion (or a spiral portion) forming the back of the tooth. The curved portion is preferably configured to ensure a progressive trajectory of the blanks towards the receiving socket.

[0028] In practice, each semicircular portion thus has two ends, namely a first end forming the tip of a tooth of the selector plate, and a second end from which the curved portion extends. The first end is located on a first circle centered on the central axis, and the second end is located in a second circle also centered on the central axis and of diameter smaller than that of the first circle. The curved portion joins the first end of an adjacent semicircular portion so as to form another tooth of the selector plate. Thus, all the tips of the teeth of the selector plate are located on the first circle.

[0029] To ensure the progressive supply of the crudes into each of the receiving cells, the curved portion advantageously has a profile of the type corresponding to an arc of an Archimedean spiral developed on 2n whose center of rotation coincides with that of the selector plate.

[0030] Under these conditions, the arrival trajectory of the blanks on the curved portion (corresponding to the back of the tooth) is preferably parallel to an axis perpendicular to the tangent at a predefined point of the curved portion, preferably at the level of the tip of the corresponding tooth. The redrawing module may further comprise a system for ejecting the tips after redrawing.

[0031] Advantageously, when the redrawing module is intended to be installed as a rework module, the ejection system is preferably configured to reassemble the tip after redrawing. The ejection system may be in the form of spring plungers attached to each die, or a set of cam ejectors coupled to each die to reassemble the tip after redrawing, when the tip is to be transferred to another redrawing module, for example to another rework module or to a finishing module.

[0032] Advantageously, when the redrawing module is intended to be installed as a finishing module, the ejection system is preferably configured to eject the tip downwards after redrawing. The ejection system may be in the form of an air jet generated by each punch and configured to eject the corresponding tip downwards after redrawing.

[0033] In practice, each blank holder can be a pneumatic pressure piston.

[0034] Furthermore, to limit the heating of the slides due to the instantaneous overpressure generated by the blank-holder pistons, it is possible to add an overpressure limiting valve to each slide block, and also a thermal cooling device, for example in the form of cooling fins.

[0035] Alternatively, a re-stamping module may incorporate the selector plate described above with or without the adjustable tilt inductor plate, or may incorporate the adjustable tilt inductor plate described above with or without the selector plate.

[0036] The proposed redrawing module is thus an elementary, autonomous, and universal module. Its configuration allows to form a redrawing chain or line by associating several redrawing modules together according to needs.

[0037] Thus, the invention also relates to a deep redrawing machine comprising at least one redrawing module as described above.

[0038] Advantageously, when the re-stamping module comprises a selector plate as described above, the machine may further comprise:

[0039] - a tip input conveyor towards the selector plate, the conveyor preferably being configured to bring the tip to the selector plate along a predefined arrival trajectory. This arrival trajectory is preferably linear and parallel to an axis perpendicular to the tangent at a predefined point of the curved portion, preferably at the tip of the tooth.

[0040] For example, the axis of the rough arrival trajectory passes through the tip of the tooth of the cell in which it must be received and the center of the semicircle forming said cell. Thus, unlike the configurations of the prior art in which the rough arrives following an arrival trajectory parallel to an axis passing through the center of the star wheel, the rough arrival trajectory in the present solution the feed axis no longer passes through the center of rotation.

[0041] In other words, the rough material comes into contact with the curved portion along an arrival path perpendicular to the tangent at this point of contact. This point of contact may, for example, be the tip of the tooth, and the axis of the arrival path preferably passes through both ends of the cell preceding the cell in which the rough material is to be received, following the direction of rotation of the selector plate. Such a combination makes it possible to feed the rough material into the dies with a strictly constant feed rate and without any unwanted jolts.

[0042] In practice, the input conveyor comprises a conveyor track coupled to a nozzle-type blowing system, configured to generate a low-pressure laminar air flow to move the tips on the conveyor track along said arrival trajectory.

[0043] According to one embodiment, the machine comprises a plurality of deep redrawing modules mounted in series forming a redrawing line, each redrawing module being as described above, and the redrawing module at the start of the line is supplied with tips via the inlet conveyor described above. Furthermore, in order to allow a smooth and seamless transfer of the tips between two successive redrawing modules of the line, the machine may further comprise:

[0044] - a transfer conveyor arranged between first and second successive re-stamping modules of the line, the transfer conveyor comprising:

[0045] . an input coupled to the selector plate of the first redrawing module and configured to receive the tips redrawed and ejected by the first redrawing module; and . an output coupled to the selector plate of the second redrawing module and configured to supply the second redrawing module.

[0046] Advantageously, the transfer conveyor is also coupled to an air blowing system, such as a nozzle, to generate a low-pressure laminar air flow, the nozzle being positioned and configured to move, via a venturi suction effect, the tips ejected by the first redrawing module into the transfer conveyor and to move these tips towards the second redrawing module. Preferably, the transfer conveyor forms a buffer magazine controlled by proximity detectors, allowing synchronization between two successive barrels.

[0047] The combination of the selector plate, which allows direct feeding of raw materials onto the barrels, and the pulsed air conveying system, allows a feeding or transfer speed limited only by the performance of the synchronization electronics. This configuration eliminates the need for expensive and polluting mechanical transmissions requiring the use of lubricants, and allows for an optimized production speed. Brief description of the figures

[0048] Other characteristics and advantages of the invention will emerge clearly from the description given below, for information purposes only and in no way limiting, with reference to the appended drawings, in which:

[0049] Figure 1 is a front view of a stamping module according to one embodiment. Figure 2 is a sectional view of one side of the stamping module of Figure 1 with the inclined inductor plate.

[0050] Figure 3 is a top view of the stamping module of Figure 1 showing an example of a means for adjusting the inclination of the inductor plate.

[0051] Figure 4 is a more refined representation of Figure 3.

[0052] Figure 5 is a schematic representation seen from above of the selector plate according to one embodiment.

[0053] Figure 6 is a partial schematic representation of the selector plate of Figure 5 illustrating the trajectory of crudes arriving at the selector plate.

[0054] Figure 7 is a front view of an installation implementing two redrawing modules of Figure 1.

[0055] Figure 8 is a perspective view of the installation of Figure 7.

[0056] Figure 9 is a partial representation of the transfer conveyor positioned between the selector trays of the rework and finishing barrels in the installation of Figure 7.

[0057] Method(s) of carrying out the invention

[0058] A stamping module according to one embodiment is illustrated in Figures 1 and 2, and comprises a fixed frame 1 formed by an upper part 11 and a lower part in the form of a horizontal table 12 having a main surface 120 carrying a central reference axis Z perpendicular to said main surface 120. A circular inductor plate 2 coupled to a motor, such as a constant torque and variable speed geared motor, is positioned at the upper part 11 of the frame 1. The motor is configured to drive the inductor plate 2 in rotation about a central axis of rotation A, the axis of rotation A and the central axis Z converging at the center of the inductor plate 2. The upper part 11 of the frame 1 may comprise two swan-neck walls between which the inductor plate 2 is located.

[0059] According to one embodiment, the inductor plate 2 is mounted to move relative to the frame 1 via means for adjusting the inclination of the inductor plate 2. In particular, these adjustment means are configured to allow adjustment of the angle a formed between the axis of rotation A and the central axis Z.

[0060] As illustrated in Figure 3, these inclination adjustment means are advantageously in the form of a stirrup plate 6 comprising a support portion 61 from which the two arms 60 of the stirrup extend. The support portion 61 supports the motor, and is pivotally mounted about a pivot axis X. This pivot axis X extends parallel to the main surface 120 and is perpendicular to the central axis Z. In practice, the motor is coupled to the reduction plate by means of a transmission lantern 20 secured to the support portion 61 of the stirrup plate 6. In other words, the support portion 61 acts as a cradle for the transmission lantern.

[0061] The two arms 60 of the stirrup plate 6 are removably fixed to the frame 1, for example via a set of pins 63. In practice, the upper swan-neck part of the frame 1 may comprise several positions for fixing these pins 63, for example in the form of tapped holes in the walls of the frame. The arms 60 of the stirrup can also be fixed to the frame 1 by means of straps or flanges 64 whose length corresponds to a predefined angle of inclination of the inductor plate 2 relative to the main surface 120. Thus, whatever the means of fixing the arms to the frame, the modification of the angle of inclination of the inductor plate is carried out by changing the position of the arms relative to the frame.

[0062] The stamping module further comprises a rotating barrel 3 centered on the central axis Z. The barrel 3 is coupled to the motor and is rotated about the central axis Z by the motor. Generally, the barrel 3 and the inductor plate 2 are independently coupled to the motor via coupling means 7, such as an Oldham or Oldham cross type coupling. The barrel 3 consists in particular of a slide-carrying turret 31 and a die-carrying crown 33 centered on the central axis Z.

[0063] The die-carrying crown 33 positioned parallel to the main surface 120 is centered on the central axis Z and is mounted integral with the turret 31. The crown 33 is therefore provided with a plurality of dies 330 distributed regularly around the central axis Z. The slides 32 are arranged around the central axis Z parallel to each other. Each slide 32 is mounted to move in translation parallel to the central axis Z and is coupled to the inductor plate 2 by one of its ends, the other end of the slide 32 being provided with a stamping tool 320, such as a punch coupled to a blank holder, positioned directly above one of the dies 330. The turret 31 carries a plurality of slides 30 or guide rails in translation in a direction parallel to the central axis Z. These slides 30 are distributed regularly on the external surface of the turret 31 around the central axis Z, and the slides 32 are mounted to slide on these slides 30.Each slide 32 is coupled to the inductor plate 2 by one of its ends via an articulated means 4, such as a connecting rod, and the tooling 320 is positioned on the other end of the slide 32. Furthermore, to limit the heating of the slides 32 due to instantaneous overpressure generated by blank-holder pistons integrated in the slides, it is possible to add pressure limiting valves combined with cooling fins 34 to each slide block.

[0064] In operation, each connecting rod is configured to transmit a sinusoidal translational movement to the slide 32 during rotation of the inductor plate 2. The drawing depth of the slides can be adjusted by lengthening or shortening these connecting rods. Thus, each of the slides 32 coupled to the inductor plate 2 moves closer to or further away from the die-carrying ring 33 depending on their angular position on the inductor plate 2, and the angle of inclination a of the axis of rotation A of the inductor plate 2 fixes the stroke of the slides 32. Adjusting the inclination of the inductor plate therefore allows optimal adjustment of the stroke of the slides.

[0065] The die-carrying crown 33 is advantageously surmounted by a circular selector plate 5 configured to allow the direct reception and positioning of the blanks at the level of each of the dies 330. The selector plate 5 is centered on the central axis Z and is mounted integrally with the die-carrying crown 33.

[0066] As illustrated in Figures 5 and 6, the profile of the selector plate between two successive tooth tips 52 advantageously has a cell 51 for receiving a blank and a curved portion 52. Each cell 51 is positioned directly above a die 33, and the internal surface of each cell is configured to envelop the external surface of a cylindrical tip over an angle portion. For example, the internal surface of each cell 51 is of semicircular shape to envelop the external surface of a cylindrical tip 8 over 180°.

[0067] The external profile of the selector plate 5 illustrated in Figure 5 has, between two successive tooth tips 53, a semicircular portion 51 forming the tip-receiving socket, and a curved portion 52 forming the back of the tooth. Each semicircular portion 51 has a first end 510 forming the tip 53 of a tooth of the selector plate, and a second end 511 from which the curved portion 52 extends. The first end 510 is located on a first circle C1 (shown in dotted lines in Figure 5) centered on the central axis Z, and the second end 511 is located in a second circle C2 (shown in dotted lines in Figure 5) centered on the central axis Z and of diameter smaller than the diameter of the first circle C1. The curved portion 52 joins the first end of the adjacent semicircular portion 51.This particular shape of the selector plate makes it possible to ensure a progressive supply of the raw materials into each of the receiving cells, without requiring the implementation of complex mechanical transmission means, while ensuring an optimized production speed. In practice, the curved portion 52 advantageously has a profile of the type corresponding to an arc of an Archimedes spiral developed on 2n whose center of rotation coincides with that of the selector plate.

[0068] Preferably, the tips 8 arriving on the selector plate 5 follow a linear arrival trajectory parallel to an axis 80 perpendicular to an axis T. This axis T is preferably tangent to the curved portion 52 preceding (in the direction of rotation of the selector plate 5) the socket 51 in which the tip must be received, for example tangent to the level of the tip of the tooth as illustrated in figure 6.

[0069] Depending on the number of redrawings required, a redrawing machine can thus comprise a redrawing module or a succession of redrawing modules arranged in a chain so as to carry out the various successive passes.

[0070] Figures 7 and 8 illustrate an example of an installation implementing two redrawing modules, the installation further comprises a rough input module (not shown in Figure 7) and a rough transfer module (not shown in Figure 7). The machine thus comprises a first redrawing module 1A called “rework” and a second redrawing module 1B called “finishing”. The rework module IA is coupled upstream to an input conveyor 90. This input conveyor 90 is configured to bring the tips to the selector plate of the rework module IA, following the arrival trajectory defined above.

[0071] In practice, the inlet conveyor 90 incorporates a nozzle-type blowing system, configured to generate a low-pressure laminar air flow to move the tips along the conveyor track.

[0072] A transfer conveyor 91 is also arranged between the two re-stamping modules IA and IB, to ensure the transfer of the tips from the rework module IA to the finishing module IB. As illustrated in FIG. 9, the inlet 910 of the transfer conveyor 91 is coupled to the selector tray 5A of the rework module and receives the tips ejected by the rework module. The outlet 911 of the transfer conveyor 91 is coupled to the selector tray 5B of the finishing module and feeds the selector tray 5B on the same principle as the inlet conveyor 90.

[0073] To ensure the ejection of the tips, the IA rework module can be provided with a tip ejection system in the form of spring pushers attached to each die, or a set of cam ejectors coupled to each die to reassemble the tip after re-stamping.

[0074] The transfer conveyor 91 may incorporate a nozzle downstream of the inlet 910 to generate a low-pressure laminar air flow. The nozzle is notably positioned and configured to induce suction by venturi effect of the tip ejected by the recovery module IA in the transfer conveyor 91 and to push by low-pressure laminar flow these tips towards the finishing module IB.

[0075] Thus, the blanks are brought by the input conveyor 90 to the selector plate 5A of the rework module IA. A first stamping pass is carried out on the blank, then the stamped blank is ejected and moved into the transfer conveyor 91 to be transferred to the selector plate 5B of the finishing module IB to undergo a second stamping pass. The ejection of the tips from the finishing module IB can be ensured by an air jet generated by each punch to eject downwards the corresponding tip after its redrawn. The redrawn modules of the machine are autonomous, since each is driven by its own motor, and it is possible to adjust the stroke of the slides of a redrawn module independently of the stroke of the slides of the other modules.

[0076] The solution of the invention thus makes it possible to design a redrawing module with minimum dimensions adapted to the forces to be applied and the maximum possible number of punch / die assemblies. The rotational inertia of the module can be drastically reduced and allows rotation speeds much higher than those of current machines, provided that the maximum drawing speeds defined for a long time in this area are respected.

Claims

CLAIMS 1. Deep redrawing module for cylindrical metal tips, including: - a fixed frame (1) comprising a horizontal table (12) defining a main surface (120) carrying a central reference axis (Z) perpendicular to said main surface (120); - a circular inductor plate (2) coupled to a geared motor, centered on the central axis (Z), and driven in rotation around a central axis of rotation (A); - a rotary barrel (3) centered on the central axis (Z) and driven in rotation around the central axis (Z) by the geared motor, the barrel (3) comprising a slide-carrying turret (31) and a die-carrying crown (33) centered on the central axis (Z), the slides (32) being arranged around the central axis (Z) parallel to each other, each slide (32) being movable in translation parallel to the central axis (Z) and being coupled to the inductor plate (2) by one of its ends, the other end of the slide (32) being provided with a stamping tool positioned vertically above one of the dies (330); characterized in that the redrawing module further comprises: means for adjusting an angle of inclination (a) of said axis of rotation (A) of the inductor plate (2) relative to said central axis (Z).

2. Re-stamping module according to claim 1, characterized in that the means for adjusting the angle of inclination of the rotation axis (A) relative to said central axis (Z) comprise at least one stirrup plate (6) comprising a support portion (61) carrying the inductor plate (2) and from which the two arms (60) of the stirrup extend, the support portion (61) being pivotally mounted on the frame (1) around a horizontal pivot axis (X), this pivot axis (X) extending parallel to the main surface (12) and being perpendicular to the central axis (Z), the end of each arm (60) being removably fixed to the frame (1), and the modification of the angle of inclination of the inductor plate (2) being obtained by changing the fixing position of the arms (60) on the frame (1).

3. Re-stamping module according to claim 2, characterized in that each arm (60) is fixed to the frame (1) by means of a flange (64) whose length corresponds to a predefined angle of inclination of the axis of rotation (A) of the inductor plate.

4. Re-stamping module according to claim 3, characterized in that the axis of rotation (A) of the inductor plate (2) and the central reference axis (Z) converge at the center of the inductor plate (2).

5. Re-stamping module according to one of claims 1 to 4, characterized in that the re-stamping module further comprises: - a circular selector plate (5) with external teeth (50), centered on the central axis and secured to the die-holder crown (33), the selector plate (5) comprising sockets (51) for receiving tips defined between the successive teeth (50), each socket (51) being positioned directly above a die (330) and the internal surface of each socket (51) being configured to envelop the external surface of a tip over a portion of an angle close to 80°.

6. Re-stamping module according to one of claims 1 to 5, characterized in that it further comprises a system for ejecting the tips after re-stamping: - the ejection system being configured to reassemble the tip after redrawing, when the tip must be transferred to another redrawing module; or - the ejection system being configured to eject the tip downwards after redrawing, when the redrawing module is a finishing module.

7. Deep redrawing machine comprising one or more redrawing modules according to one of claims 1 to 6.

8. Re-stamping machine according to claim 7, characterized in that it further comprises an input conveyor (90) for tips configured to bring the tips to the selector plate (5) following a predefined linear arrival trajectory.

9. Re-stamping machine according to claim 8, characterized in that the input conveyor (90) comprises a conveying track coupled to a nozzle-type blowing system, configured to generate a low-pressure laminar air flow to move the tips on the conveying track along said arrival trajectory.

10. Re-stamping machine according to one of claims 8 or 9, characterized in that it comprises: - a plurality of redrawing modules (IA, IB) mounted in series and forming a redrawing line, each redrawing module being according to one of claims 1 to 6, said input conveyor (90) supplying tips to the redrawing module positioned at the start of the line, - a transfer conveyor (91) arranged between first and second successive re-stamping modules of the line, the transfer conveyor comprising: . an inlet (910) coupled to the selector plate (5 A) of the first re-stamping module (1 A) and configured to receive the tips re-stamped and ejected by said first re-stamping module; and . an output (911) coupled to the selector plate (5B) of the second redrawing module (IB) and configured to supply power to the second redrawing module.

11. Re-stamping machine according to claim 10, characterized in that the transfer conveyor (91) is coupled to a nozzle-type blowing system for generating a low-pressure laminar air flow, the nozzle system being positioned and configured to move, via a venturi suction, the tips ejected by the first re-stamping module (IA) into the transfer conveyor (91) and to move, via a low-pressure laminar flow thrust, the tips towards the second re-stamping module (IB).

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