CH668056A5 - WINDING METHOD AND WINDING AND FIXING MACHINE FOR THE END OF A WIRE FOR CARRYING OUT SAID METHOD. - Google Patents

Description

DESCRIPTION

The subject of the present invention is a method as well as a machine for winding and fixing the ends of a wire, more particularly intended for winding large series of miniaturized coils, as commonly used in recording and recording devices. sound playback for example.

To make such coils, there are at present two types of machines, some of which wind by driving the coil in rotation on itself (cf. for example DE-OS-2.632.671; DE- OS-3.049.406 or US 4,157,165) and the others use a winding mandrel or “flyer” comprising a thread guide driven in rotation around the body of a reel for its winding (cf. DE-OS-2.120. 217 or CH 656.597).

Whatever type of winding machine is used, it is necessary that this provides for four relative movements between the reel holder and the thread guide, three orthogonal linear displacements and a rotation; in all existing machines, these relative movements are caused by separate mechanisms, one carrying the spool holder (s) and the other carrying the corresponding thread guide (s). Because the spool holder is movable in at least one direction relative to the rest of the machine, it is imperative, before winding, to load empty spools on the spool holders, then to evacuate them after their winding. These operations of feeding the coils and evacuating them after winding necessarily cause a working mode of these winding machines which is discontinuous and which causes a loss of time and therefore a limitation of the production rate of the coils.

However, at present, the number of these miniature coils increases very widely to meet demand and, the prices being always more limited, the main aim of the present invention is to allow pseudo-continuous operation of the winding machines. to increase the production rate.

This object is achieved by the winding method according to the present invention which consists in mounting one or more winding mandrels of the “flyer” type on a frame so as to be movable in three directions orthogonal to this frame, as well as to be able to be driven in rotation relative to this frame and to move linearly step by step at least one coil facing this mandrel.

The winding machine for implementing the method described is distinguished by a frame, electromechanical means making it possible to move one or more winding mandrels of the “flyer” type in three orthogonal directions and in rotation about their axes relative to said frame. , as well as by a feed device moving linearly step by step a series of coils opposite said winding mandrels.

The attached drawing illustrates schematically and by way of example an embodiment of the winding machine according to the present invention.

Figure 1 is an overall perspective view illustrating the winding machine without its reel supply device.

Figures 2 to 5 illustrate sub-assemblies of the machine illustrated in Figure 1.

Figure 6 is a partial view of the machine illustrated in Figure 1 illustrating a part of its coil supply device.

Figure 7 is an enlarged detail of the coil supply device.

Figures 8 to 13 illustrate different phases of winding a coil and fixing the ends of the wire on the input and output terminals of this coil.

The present method of winding and fixing a wire to the lugs of a coil consists in mounting one or more winding mandrels of the “flyer” type with respect to a fixed frame or base in such a way that these winding mandrels perform by relation to this frame all the relative displacements, linear along three orthogonal axes X, Y, Z and rotary around their axis, necessary for the winding and the fixing of the wire, and to move linearly step by step a series of coils opposite these winding chucks, the movement of the coils used only for the supply of the coil bodies and for the extraction of the finished coils; this displacement of the coils occurring between two successive winding operations.

Thanks to this process and to the machine for its implementation which will be described below, it is possible to produce coils according to a pseudo-continuous process, which makes it possible to very appreciably increase the production rate by reducing greatly the idle times which until now were necessary to position the bobbin bodies one by one on the bobbin carriers between two winding operations.

The winding machine for implementing the described method is illustrated, schematically and in an embodiment by way of example, in the accompanying drawing. This winding machine comprises a frame 1 or fixed base intended to be fixed to the ground or on a support. This frame 1 has a support 2 on which is mounted a first electric motor 3, for example a stepping motor, driving through a toothed belt 4 and pinions 5, 6 a lead screw 7 pivoted in a support 8 secured to the frame 1.

This lead screw 7 cooperates with a nut 9 secured to a table 10, mounted on the frame 1 using slides 11. Thus, during rotation

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of the motor 3 in one direction or the other, one obtains a relative displacement of the table 10 relative to the frame 1 in a first direction X in a corresponding direction.

This table 10 comprises a support 12 on which is mounted a second electric stepping motor 13 driving in rotation, by means of a toothed belt 14 and pinions 15, 16, a second mother screw 17 pivoted in a support 18 secured to the table 10.

This second lead screw 17 cooperates with a nut 19 secured to a frame 20 mounted to slide on said table 10 by means of slides 21. A rotation of the motor 13 drives the frame 20 in a corresponding linear displacement relative to the table 10 in the direction Y orthogonal to the direction X of movement of the table 1 relative to the frame 1.

The frame 20 comprises a support 22 on which is mounted a third electric stepping motor 23, driving a third mother screw 27 in rotation by means of a toothed belt 24 and pinions 25, 26. This third mother screw 27 is pivoted in a support 28 secured to the frame 20 and cooperates with a nut 29 secured to a slide 30 sliding on the frame 20 by means of slides 31.

Any rotation of the third motor 23 causes a corresponding linear displacement of the slide 30 relative to the frame 20 in a direction 2 orthogonal to the directions X and Y.

This slide 30 carries a block 41 in which are pivoted several winding mandrels 32 of axes parallel to each other and parallel to the direction Y of movement of the frame 20. Each of these winding mandrels or "flyer" comprises an eccentric thread guide 33 through which the wire is unwound during the winding operation. In the example illustrated, the rotary axis of the mandrel 32 comprises two pinions 34, 35, one connected by a toothed belt 36 to pinions carried by the rotary axis of each of the other mandrels and the other connected to a pinion 37 by a belt 38, pinion 37 driven in rotation by an electric motor 39 for example of the stepping type, fixed on a support 40 integral with the block 31. Thus, all the winding mandrels 32 are driven in rotation simultaneously by the motor 39.

In the variant illustrated in FIG. 6, the block 41 carries a base 42 on which the winding mandrels 32 are pivoted along axes parallel and parallel to the direction Z of movement of the slide 30. The motor 39 is mounted on this base and its pinion 38 directly drives all the pinions 43 respectively fixed to each rotary axis corresponding to a mandrel 32, by a belt 44.

It can thus be seen that by replacing the support 40 with the base 42, the winding machine is transformed from a machine with horizontal chucks into a machine with vertical chucks. This makes it possible to adapt the winding machine easily and quickly to the main existing winding conditions.

FIG. 7 schematically and partially illustrates a device for feeding and extracting the coils. This device comprises a guide 50 disposed opposite the mandrels 32 in which slides a conveyor belt 51 provided with holes each receiving a coil body 52 provided with an input terminal 53 and an output terminal 54. A device d The drive formed by rollers 55, 56 makes it possible to cause the conveyor belt 52 to advance over a desired distance, corresponding to the replacement of the wound reels by the same number of reel bodies to be wound.

668,056

This supply and discharge device is pseudo-continuous and can be placed either horizontally if the mandrels are vertical, or vertically if the mandrels are horizontal.

In variants, the conveyor belt 52 can be replaced by a support band coming from an injection or molding part with the bodies of coils to be wound.

The winding machine also includes, for each mandrel 32, a thread breaker 45 fixed to the slide 30.

The described winding process and the operation of the described winding machine comprise the following successive operations:

a) The installation by the supply device of a number of coil bodies to be wound corresponding to the number of mandrels of the winding machine. Simultaneously, the reels completed during the previous winding operation are evacuated.

b) The wires coming out of the wire guides 33 being fixed in the corresponding wire breakers 45, the mandrels are positioned, using the motors 3, 13 and 23, so that the wire guides 33 are placed so that , when they are rotated, they rotate around the input terminal 53 of the corresponding coil body 52 without interfering with the coil body or with the output terminal 54 (Figure 8).

c) The mandrels are rotated a few revolutions to fix the wire to the input terminal 53.

d) The mandrel makes a half-rotation and the wire is cut by a wire cutter mounted on this mandrel.

e) The mandrels are positioned by the motors 3,13 and 23, in the winding position, either so as to circulate around the body of the coils when they are rotated (Figure 10).

f) The mandrels are rotated by the motor 39 and in an axial back-and-forth by the motor 23 or 13 depending on the execution to achieve the desired winding.

g) The mandrels are positioned using the motors 3, 13 and 23 so that the wire guide 33 rotates around the output terminal 54 during a rotation of the mandrel without interfering with the input cam 53 or the coil body 52 (Figure 11).

h) The mandrels are rotated to fix the wire to the output cam 54.

i) The mandrels are moved using motors 3,13 and 23 to pinch the wire in the corresponding wire breaker 45 (Figure 12).

j) Rotating the mandrels by half a turn cuts the wires using the wire cutters.

k) The feeding device evacuates the coils produced and places a new series of coil bodies in the winding position.

An additional advantage of the machine described derives from the use of the thread breakers, since the reels are completely finished when they are extracted from the machine and a great length of wire is saved. Indeed, in existing machines, the wire is not broken between the winding of two successive coils which remain connected together and are not separated until later.

Blank reels can be loaded on pallets for transfer to and from the winding position.

Finally, it is obvious that the machine described can constitute a work station, the winding station, of a complete installation for manufacturing coils.

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5 sheets of drawings

Claims (10)

668,056 CLAIMS 1. A method of winding and fixing a wire, characterized in that one or more winding mandrels of the “flyer” type are mounted on a frame so as to be movable in three directions orthogonal to this frame as well that being able to be driven in rotation relative to this frame; and that a series of coils is moved linearly step by step opposite these mandrels. 2. Method according to claim 1, characterized in that the wire is cut between two successive winding operations and that it is kept on standby. 3. Method according to claim 1 or claim 2, characterized in that linearly displaces the coil bodies to put them in the winding position and simultaneously linearly moves the coils produced previously to evacuate them. 4. Winding machine for implementing the method according to claim 1, characterized in that it comprises a frame, electromechanical means making it possible to move one or more winding mandrels of the “flyer” type in three orthogonal directions and in rotation about their axes relative to said frame, as well as by a feed device moving linearly step by step a series of coils facing said winding mandrels. 5. Machine according to claim 4, characterized in that the axis of each mandrel is perpendicular to the plane of movement of a table on the frame. 6. Machine according to claim 4, characterized in that the axis of each mandrel is parallel to the plane of movement of a table on the frame. 7. Machine according to claim 5 or claim 6, characterized in that it also comprises a sliding frame on the table in a direction orthogonal to the direction of movement of the table relative to the frame. 8. Machine according to claim 7, characterized in that it also comprises a slide movable linearly relative to the frame in a direction orthogonal to the directions of movement of the table and the frame, and by the fact that this slide carries the mandrels winding. 9. Machine according to claim 8, characterized in that it comprises means for driving the table, the frame and the slide in their linear movements, as well as means for driving in rotation the winding mandrels. 10. Machine according to claim 9, characterized in that it comprises a feeding device allowing, by a linear movement, to simultaneously put in the winding position a series of coils.