DE1961729A1 - Process for winding spiral springs and equipment for carrying out this process - Google Patents

Description

196172

-9.Dec.1969

Patent attorneys

DipUr.;: ^Λ ■ · rl: DDE
Dir '.- Ί: ·; · K. C. ■: i PL
Münciion / I, üci-.umannstr. 2

Rudolf Greiner, Langenthai (Switzerland) »

Method for winding coil springs and device to carry out this procedure »

For the division of small spiral springs, as they are required for measuring instruments of all kinds and attoh for watches, it is known to deform a plurality of individual spring strips that have already been cut to a predetermined length in a common winding process to form spiral springs xa coiled into one another a rotatably mounted winding mandrel is used, which at its free head end has a plurality of fastening slits evenly distributed in the dtofangsrichtong.

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btcaa is provided, which is designed in the shape of a doeen, has a central opening opening on its bottom, and on its edge of the can has a plurality of equally massively distributed guide slits in the circumferential direction, the number of which is equal to the number of fastenings made in the winding mandrel »- slots»

Before starting each winding variation, a slightly still empty spring haas is pushed over the winding mandrel by means of its guide 8f £ »mg / in such a way that its head end rises from below into the barrel of the barrel, which is open at the top Wiokeldornee inserted one end of a spring band ; also is the spring in question * still tied in the corresponding guide slot of the spring haoses insert · Are Vickeldom tmd shuttlecock in sent "· * smelling synaetrischer ¥ else · equipped with the required number pen * binder, then while holding the Fed edify the mandrel is rotated fully wound until the Ixmenram of the barrel "Sarauf is the barrel along with the spirally wrapped in it spring strips according withdrawn upwardly from the winding mandrel, xm then vorscnehmen usual for the production of coil springs thermal treatment * the winding mandrel is then for receiving a further

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and still empty FecSerbausss ready to ensure a nüchsten sets van herzactellen coil springs in the manner explained "

See above briefly described and commonly used procedures for winding τοη spiral springs ict ram solid β rather unrational and expensive, because maeegebonde work »- * processes lateral binding and practically only τοη hand listed fcSnner * /.v.sserdeci iet it by means of this known method ? not egg gliah _s coil springs vcn very small Innendurchce ^^ cr horzastellen because the mandrel a gewisecn ainljnleti Dnrclimeeeer liaben ross, xtm ever dae for the VicSr-slveits - take "" required Drelascment txt * $ can _o Spira songs with vergleichsveise ge * "A small inner diameter would, however, be very desirable for numerous Am- * vendangB areas *

Deagemäse, the present invention relates to a method of winding spiral springs _t in which a plurality of spring strips during the winding process "in iseirtrlsch eywaetriecher wines durohsets the inner frame of a barrel and individually associated with them and attached to the barrel peripherally attached guide slides" SrfindungsgeffMas can Deficiencies in the usual winding process can be eliminated, since the barrel is thrown with a base plate that has a

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BATH ORIGINAL

with regard to the barrel has a centric inlet opening; that the spring straps are secured against rotation through the said inlet opening and enter the interior of the spring housing in a direction perpendicular to the intended winding plane or as low as the wind; and that the winding · - operation is performed by rotating relative movement between the base plate and barrel, said spring strips each z on the inner end parts of the solchermaseen coil springs obtained by a z ^ their longitudinal extension oblique axis are bent "The preferred further development of the erfindungsgemäsaen method furthermore provides that only after completion of the winding process, the inner end parts of the spiral springs are separated from the spring bands passing through the inlet opening, and that after the removal of the barrel filled with one set of spiral springs, the remaining spring strips, which still protrude through the inlet opening, are used in the production of the next set length required by spiral springs can be requested

The inventive method and for example Devices for carrying out the same are explained in more detail below with reference to the drawing, in which

Fig. 1 is a perspective view of the base plate and the barrel of a first version fora shows, in wel <-

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rather, the spring strips in a perpendicular to the intended The direction in which the winding plane runs is in the base plate leave attached inlet opening;

Fig. 2 is a plan view only of the entry » The opening of the base plate according to FIG. 1 shows, the inner end parts of the spring straps also shown showing different stages at the beginning of the winding process to borrow

FIG. 3 is a plan view analogous to that in FIG. 2 reproduces, but in contrast to FIGS the spring strips the entry opening made in the base plate in a skewed direction to the intended winding plane ongoing sighting

Fig »4 shows the perspective view of the inner end & - Part of one of the spring straps according to Fig. 3 shows, from which the occurring bend around one to its lengser Stretching inclined axis can be seen;

5 shows a plan view of the inner end fittings and the adjoining inner turns of the spirally wound one inside the other! Spring band after completion of the winding process shows if it was before the beginning of the Vickel process 3 emerged from the inlet opening of the base plate at an oblique angle;

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BAD QRHäiNAL

Pig · 6 one on top of the one in the base plate The inlet opening shows from which the spring ribbons emerge crookedly, just as in Pig 3, but eire compared to the Pig »3 to 5 opposite winding direction is accepted;

Figure 7 shows the perspective view of the inner end portions of two of the spring strips according to Figure 6, from which the turns that occur by one each to their longitudinal extension inclined axis can be seen;

Pig 8 is a top plan view of the inner strap portions and the opening attached inner turns of the spiral into each other wound spring strips after completion of the winding process 3 shows when this is illustrated in Fig. 6 and 7 Winding direction is done; and

Pig »9 shows a perspective view of the base plate and the barrel of a second embodiment, in which the spring strips as in Pig 1 leave the inlet opening provided in the base plate in a direction perpendicular to the winding plane, but this inlet opening has one of the same number of Angg hT spring strips has star-like outwardly pointing slots which secure the spring straps against rotation without the aid of an additional clamping member »

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The configuration according to the facility. Fig · 1 has a base plate 1 which ISTC not closer to oinem illustrate <~ Iichten apparatus frame screwed fixedly This base plate 1 iet »it an ala bore formed entry söffnung 2 provided _t through which a number of spring strips 6 in concentric smelling Ejmmetrischer arrangement from below can be conveyed through to the top. Usually six such spring strips 6 are used, as illustrated in the top view according to FIG. 2; In the view according to Fig. 1, for the sake of clarity, only three of the said spring strips 6 are shown.When using six spring strips 6, the radius of the inlet opening is selected approximately equal to the blade height of the spring strips 6 Required spring strips 6, for example, a blade height το »0.2 millimeters and a blade thickness of about 0.03 millimeters.

In the tree below the base plate 1 is furthermore in A feed device attached to the aforementioned apparatus frame, by means of which all spring strips 6 through simultaneously through the inlet opening 2 in a direction perpendicular to the top of the base plate 1 upwards The feeders fed to the feed device> -

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BAD ü «iüiNÄL

Ribbons 6 are in the present example of six supply drums are handled, which latter rotate in the apparatus rack » are stored in cash. The formation of the feed device and the arrangement of the storage drums is preferably used for Axis of the inlet opening 2 provided symmetrically in the center · The feed device and the storage drums are not shown in more detail in the drawing, as they are used to explain the method according to the invention and the The way in which the device works to carry out this procedure is not of major importance

Before the beginning of the winding process, the spring straps are 6 conveyed upwards by means of the feed device so far that their above out of the inlet opening 2 - protruding pieces have a length which is equal to the length of the spring band of the coil springs to be wound it is best to ensure that each of the spring strips 6, from the inlet opening 2 seen from falling in the radial direction outwards, as this for the two spring bracket pieces falling to the left in FIG. 1 6 is indicated · For reasons of clarity are in the drawing not the full required lengths of the spring band pieces, but only their inner parts shown · Is the required feed

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the spring strips 6 takes place, these are according to Fig. I and 2 to the periphery by means of a clamping organ 10 pressed against the inlet opening 2 and thus secured against rotation on the base plate 1 · As a clamping element 10 a pin provided with a conical head can be used, which can be displaced in the axial direction of the entry opening. In the embodiment according to FIG. 1, the base plate 1 also has a concentric to the inlet opening 1 Annular groove 7, in which the barrel 3 used in each case can be rotatably mounted · Sin such Spring hoe 3 can be of the usual box-like design; However, according to Fig. I a downward-pointing do- * opening used · Correspondingly, they are in the edge of the can 4 peripherally recessed guide slots 5 open at the bottom, while the bottom of the can and the guides provided in it Opening 9 is then at the top * The spring hoe 3 is now lowered in such a way and supported with its can edge 4 in the annular groove 7 that each of the radially outwardly falling Spring strips 6 an associated Leiteehlitz 5 passes through without getting trapped

The best way to carry out the Vickel process is

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Spring hoe 3 rotates, as a result of which the spring strips 6 protruding from the guide slots 5 are carried along in the winding direction 8. Each of the spring strips in the inner rouge of the spring housing 3 experiences a twist around an axis AA that is inclined to its longitudinal extension, as shown in FIG only illustrated for the spring band 6 pointing to the right: As the rotation of the barrel 3 progresses, this initial twist changes into an ever more sharply pronounced bend, which forms directly on the inner end shape of the spring band leaving the inlet opening 2 »The various stages of this The process is shown in FIG. 2 if one starts with the spring band falling to the top right and still straight outward and then examines the spring bands 6 following in the winding direction 8 in a vertical on the top of the base plate 1 Hochka ntlage transferred, in which the winding process is ended * This winding process is completed when ' the interior of the barrel 3 up to the can edge 4 is filled with coiled coil springs * Normally the outer end pieces that were previously carried along by the guide slots 5 are also the Spring strips 6 straight into the

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The interior of the barrel 3 has only now been pulled in the inner end parts of the spiral springs obtained are separated from the spring straps 6 protruding through the inlet opening 2 This can be done, for example, by <3as3 one through the guide opening 9 of the barrel 3 is a corresponding cutting * punching or introduces a drilling tool which accomplishes this i severing. This separation can, however, also be achieved without the aid of special tools by turning the already completely filled spring tube 3 in the direction of winding after the winding process has ended ab

After the coil springs have been separated from the still ones ▼ remaining from the inlet opening 2 still protruding At the ends of the spring strips 6, the barrel 3 is lifted off the base plate 1 together with the spiral springs wrapped in it and the usual heat treatment Spring strips 6 take place in the length required for the production of a next set of coil springs, see above

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BATH

that in the manner already explained using a still empty barrel 3 a further winding process can be carried out «. It is obvious that these work processes can be automated to a large extent «

The method described is, however, capable of various modifications which justify further advantages can be useful to remove the spring straps 6 from the entrances » Opening 2 crooked to the one through the top of the ground » Plate 1 given winding plane to exit, as shown in Fig. 3 in plan view. Through such a A skewed exit is first achieved »that the spring strips 6 without the aid of special hate names arrange themselves in a centric symmetry manner and after fall outside If necessary, the entry * opening to be appropriately conical »For the The winding process, however, results in different conditions depending on the winding direction with which the pulled-over spring hoist 3 is rotated

If the winding direction 8, as shown in FIG. 3, is in the direction of the component of the skewed feed of the spring strips 6 falling into the winding plane, each of these is at its inner end part approximately according to FIG its LäPSs extension inclined axis A-A bent

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After the end of the winding process, calibration results for the inner band parts of the spring bands 6 and for the subsequent ones inner spiral spring coils in the plan view according to the picture Then the inner bends of the spring strips 6 take place while avoiding a pronounced kink and this winding direction has proven to be advantageous when the spring strips are made of non-ferrous metals or their alloys are made *

For spring strips 6 made of ferrous metals or their alloys, however, the winding direction 8 opposite to that in FIGS. 3 to 5 can also be used.This then runs according to FIGS. 6 to 8 in a direction which is opposite to the direction of the component falling into the winding plane Due to the skewed feeding of the spring strips 6 » Za the beginning of the winding process, the spring strips 6 are twisted as shown in FIG End parts and for the inner spiral spring windings attached to them are finally obtained after the winding process has ended a picture according to FIG. 8, which shows a top view

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Executions the anti-twist plague holding the spring strips 6 in the entry opening 2 by means of a special actuated clamping member 10 has been accepted, shows the Pig · 9 a variant that does not require such a clamping member 10 · This is made possible by the fact that the central input- opening 2 one of the number of spring strips 6 the same number of outwardly facing slots, the dimensions of which the cross-sectional profile of the spring strips to be fed through 6 · Due to the star-like arrangement of the slots, a twisting can be seen without further measures. safe entry of the spring hinges & guaranteed of which the latter in FIG. 9 for the sake of clarity only two of them are entered the winding process accomplished by means of the slipped-over barrel 5 is essentially the same as in the above Connection to which Fig. 1 has been explained · It also occurs with each of the spring strips 6 at its inner end part a pronounced bend around an axis A-A which is inclined to the longitudinal extension of the spring strip in question on »

Ultimately, what all the variants explained have in common is that the smallest possible inside diameter of the spiral springs produced is only due to the dimensions of the inlet opening 2 is limited

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Claims (1)

Claims < f 1 ·) Process for winding spiral springs, in which a large number of spring strips 6 "during the winding process in a centric symmetrical way enforce the inner rotation of a barrel-Hr)" and each individually assigned to them and in the barrel ■ peripherally attached litz wire <4fr} »Are guided, characterized in that the spring hoe (3) kit cooperates with a base plate (1) which has an inlet opening (2) which is central with respect to the spring hoe (3); that the spring bands <6) pass through said inlet opening (2) secured against rotation and entering the interior of a barrel (3) in a direction perpendicular or crooked to the intended winding plane; and that the winding process is carried out by rotating relative movement between the base plate (1) and spring barrel (3), with the inner end parts of the barrel being wet obtained coil springs the spring strips (6) are each bent around an axis (AA) which is inclined to its longitudinal extension « 2 * Method according to claim 1, characterized in that only after the winding process is complete, remove the inner end parts of the spiral springs from the opening (2) 009831/0986 penetrating spring straps (6) are separated »and that after the removal of the spring hoe (3) filled with a set of spiral springs, the remaining and still through the Inlet opening (2) protruding through the spring strips (6) required for the production of the next set of spiral springs Length to be funded 3. The method according to claim 1 or 2, characterized in that in the case of spring strips (6) fed in at an angle through the inlet opening (2), depending on the material properties of the same, the winding direction (8) of the winding process is either in the direction (Fig. 3 to 5) or opposite to the direction (Fig. 6 to 6) of the component falling into the winding plane the skewed feeding of the spring strips (6) takes place » 4 · Device for performing the method according to one of claims 1 to 3, characterized in that the with The base plate (1) provided in the central inlet opening (2) is fixedly attached and that the spring hoist (3) is rotated to carry out the winding process. 5 · Device according to claim 4, characterized in that the central inlet opening (2) is designed as a bore and a clamping member movable in the axial direction of this bore 009831/0986 (10) is provided, by means of which the spring strips (6) can be pressed against the periphery of the bore in order to to secure masses against rotation * 6 »Device according to claim 4, characterized in that the central entry so opening (2) one of the number of spring strips «; * (6) has the same number of outwardly pointing slots (Fig »9) λ , the dimensions of which correspond to the cross-sectional profile of the conveyor belts (6) and which thus counteract the spring belts (6) . Secure rotation » 7. Device according to one of claims 4 to 6, characterized in that that the base plate (1) to its inlet opening (2) centrally running means (7) for rotatable®n Bearing of the barrel (3) has 009831/0986 Ig Blank page