DE1966499A1 - PROCESS FOR THE SIMULTANEOUS MANUFACTURING OF SEVERAL INTERWORNED SPIRAL SPRINGS - Google Patents

Description

Patent attorneys

Dipl.-Ing. A. WEDDE 27 »June 1972

Dipl.-Ing. K. EMPL
Munich Schumannstrasse i

File: P 7282

(A. exclusion)

Mr. Eudolf Greiner 1366499 OH 4900 Langenthal / Sohweiz

"Process for the simultaneous manufacture of several interlocked spiral springs"

The invention "relates to a method of simultaneous manufacture several spiral springs wound into one another, starting from a corresponding number of spring strips, "at the first in a centrally symmetrical arrangement to the central axis of a winding room, the spring strips in this winding room are introduced, brought into contact with points of a first component adjacent to the central axis and attached this component are at least fixed against iängszug, the spring strips in more distant from the central axis Guide slots of a second concentrically surrounding the central axis and peripherally delimiting the winding space Component are introduced, with the greater length of the spring strips protruding outwards over the slots, then that second component around the central axis relative to the -first component is rotated and here the spring strips with bending of their areas adjoining the landing places and

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are wound into one another by drawing in their parts protruding outward through the slots into the winding space ₀ Such spiral springs are an intermediate product in the manufacture of small spiral springs, such as those required for measuring instruments of all kinds and also for clocks Spiral springs are usually subjected to a thermal treatment, separated from one another, with the inner and outer ends of the inner and outer ends being reworked, if necessary. "

In a known method of the type mentioned (US Pat. No. 443,256), two spring strips are first removed from supply drums and trimmed to a length equal to twice the length of the coil length desired for a coil spring istο The two separated spring strips become parallel arranged side by side and placed with their center in a slot which is in one of the first component A mandrel is provided, which protrudes into the winding space · At the same time, the parallel spring strips are inserted into the introduced into both guide slots of the second stationary component, which is designed as a barrel * At the beginning the following rotation of the dome, the spring

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ribbons at the trailing edge of the slot are sharp-edged around _t , namely around an axis which is perpendicular to the longitudinal extension of the spring ribbons. This fixes the spring straps against a longitudinal pull on the mandrel

The pedestrians are then wound onto the mandrel in a coiled arrangement. The known method * is inefficient and costly because the decisive process steps are time-consuming and can practically only be carried out by hand. " In addition, it is not possible with the known method to produce spiral springs with a very small inner diameter, since the winding mandrel must have a certain minimum diameter in order to be able to absorb the torque required for the winding process. However, coil springs with a comparatively small inner diameter are desirable for numerous areas of application.

The object of the present invention is to improve the known method in such a way that it can be used with less effort can be done by hand and that there is the production of coil springs, even very small diameters allowed.

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According to the invention this object is achieved in that the provided spiral length of the springs corresponding lengths of the spring strips in each case by means of feed in their longitudinal extension adjacent through a through opening of the first component introduced to the central axis in the winding space in a direction perpendicular or inclined to the intended winding plane and that the spring strips are bent about axes that are inclined to their longitudinal extension < >

The spring strips can be introduced into the winding space in such a way that their longitudinal extension is oblique or skewed runs to the central axis · There are two possibilities for the skewed feed, which lead to a different one Formation of the bending points on the occasion of the bending of the spring strips to be inclined to their longitudinal extension Axis and their choice of material and purpose of the coil springs to be produced dependent The skewed feed can be made so that its into the The component falling on the winding plane points in or opposite to the direction in which the the second component containing the guide slots relative to the first turns.

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According to a "preferred embodiment of the method the lengths of the spring strips advanced into the winding space are only removed from the remaining lengths after they have been wound up Spring band - Yorrat separated. This separation of the spring strips is preferred in the changing room while leaving in these incurred Bndteile of the spring band supply made so that after a packet has been removed it is twisted into one another Coil springs the feeding process for a new Wickel-- ™ The lengths of the spring strips required are particularly simple is feasible.

In the following, exemplary embodiments for the method according to the invention are explained in more detail with reference to the drawings which shows:

Figure 1 shows a stage of the process in which the

Spring strips in a perpendicular to the front t

seen winding plane extending in the direction made in a base plate through opening leaving;

Figure 2 is a plan view showing the inner end portions of the spring strips in various stages The beginning of the wrapping process illustrated}

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FIG. 3 shows a plan view analogous to that in Mg · 2 for a variant of the method / in which the spring straps through the through opening. crooked in a winding plane seen from the gate in the running direction}

FIG. 4 shows a perspective view of the inner band part of one of the spring bands according to FIG. from which the occurring bend around an inclined to its longitudinal extent Axis can be seen;

Figure 5 is a plan view of the inner end portions and the inner turns of the spirally ansehliessenden ineianandergew-ickelten spring strips according> completion of Wiokelvorganges when before the start of WickeIvorgangs FIG. 3 skewed been inserted through the through hole sindj _v

FIG. 6 shows a plan view of a variant of the method in which the spring strips are the same as in FIG have been introduced skewed, but opposite to FIGS. 3-5 Winding direction is assumed

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FIG. 7 is a perspective view of the inner end portions of two of the spring strips according to FIG Fig. 6, from which the evacuation to each © ine to their longitudinal extension inclined axis can be seen;

FIG. 8 shows a plan view of the inner end parts and the subsequent inner turns of the spiral-wound spring strips after completion of the winding process, if this has taken place in the winding direction illustrated in FIGS. 6 and 7 and

Figure 9 is a perspective view on the other

Variant in which the spring strips as in Fig. 1 through the through opening in a perpendicular to the winding plane in a star-like direction and fed in to the outside facing slots of the through opening without the aid of an additional clamping member the spring hinges have been secured against rotation

Before the start of each winding process, spring strips 6, the

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for example a blade height of 0.2 mm and a blade thickness of about 0.03 mm, unwound from a corresponding number of storage drums and by means of a Feed device promoted at the same time upwards so far that their protruding from a through opening 2 above Pieces have a length that is the same as the length of the spring strip ■ of the spiral spring to be wound. Furthermore, it is best to be ensured during this feeding process that each of the spring strips 6, seen from the through opening in radial direction falls outwards, as does this for the two in FIG. 1, spring band pieces 6 falling to the left are indicated is. For the sake of clarity, the drawing does not show the full lengths of the Spring band pieces shown. Is the required feed

the spring strips 6 takes place, these are mitein according to FIGS. 1 and 2 s

means / clamping member 10 pressed against the circumference of the through opening and in such a way on a stationary base plate 1, in which the through opening is formed, against rotation secured. A barrel 3 of can-like design with a downward-facing can opening, in the can edge 4 sioh peripheral recessed, downwardly open guide slots b are located, is now lowered in this way and with its can rim 4 in one

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Recess 7 of the base plate mounted that each of the radially outwardly falling spring strips 6 penetrate an assigned guide slot 5 without being pinched

To carry out the wokel process, the barrel 3 is then rotated, as a result of which the spring strips 6 protruding from the guide slots 5 are taken along in the winding direction 8. Each of the spring strips in the interior of the barrel 3 is twisted about an axis Jb-A _{1 which is inclined to its longitudinal extension} As shown in Pig 1 only for the spring band 6 pointing to the right As the rotation of the barrel 3 progresses, this initial twist turns into an increasingly sharply defined bend, which is located directly on the inner end part of the spring band leaving the barrel opening 2 forms · the various stages of this process 2 are shown in Figure "shown when a straight line emanating there from the (up to the right and more outwardly covered spring band, and then the following in the winding direction 8 spring strips 6 viewed · are thus the spring strips 6 in the area outside their inner end parts into a standing vertically on the top of the base plate 1

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Transferred upright position in which the Wiokely process is ended. This twisting process is completed when the interior of the barrel 3 is filled with spiral springs wound into one another up to the can rim 4 · First Sets are separated, the inner end portions of the coil springs obtained by den.durch the inlet opening 2 protruding spring strips. 6 This can be done, for example, by introducing a corresponding sonic or drilling tool through a guide opening 9 in the bottom of the leather house 3, which accomplishes this separation. However, this separation can also be obtained without the aid of special tools by turning the already completely filled Pederhaus 3 in the Wiokelriohtung after the end of the Wiokel process.The inner end parts of the spiral springs then tear off automatically at the location of the actual kinks. The prerequisite for this is usually that when the winding process has already been completed, the end pieces of the pedestal straps 6 nooh exit through the guide slots 5.

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After the coil springs have been separated from the remaining ones from the through opening 2 still protruding ends of the spring strips 6, the barrel 3 is together with the coil springs wrapped in it are lifted from the base plate 1 and subjected to the usual heat treatment thereon there is a demand for the protruding through the through opening 2 Spring strips 6 instead of the length required to produce a next set of coil springs, so that Carried out a further winding process in the manner already explained using a still empty barrel 3 can be · It is obvious that these work processes are amenable to extensive automation «,

The method described can be carried out in various ways, which justify further advantages. It can be expedient be, the spring strips 6 from the through opening 2 are skewed to the one given by the top of the base plate 1 To let the winding plane emerge, as FIG. 3 shows in plan view. By such a crooked one Exit is first achieved that the spring strips 6 without the aid of special measures in the center of themselves arrange symmetrically and fall outwards. Given-

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if necessary, the passage opening can also be used accordingly be conical. For the winding process, however, there are different ratios depending on the Winding direction with which the slipped barrel 3 is rotated.

If the winding direction 8 takes place according to FIG. 5 in the direction The crooked component falling into the winding plane When the 3-edged belts 6 are fed in, each of them is at its inner end part approximately according to FIG. 4 by the length of its length inclined axis A-A bent "

After the winding process has ended, the inner end parts of the spring strips 6 and the subsequent inner spiral spring windings in the top view are shown in accordance with Mg «, 5 o The inner bends of the 3-edged belts 6 then take place while avoiding a pronounced kink and have this winding direction proved to be advantageous if the spring strips are made of non-ferrous metals or their alloys _e

! For ck ± £ made of ferrous metals or their alloys Spring straps 6 can, however, also be compared to the

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Fig x 3 "to 5 opposite Wicke! Direction 8 _o Apply this then proceeds according to Figo 6 Ms 8 in a direction which is opposite to the direction of falling into the winding plane component of the skew feeding of the bands of springs 6 _O At the beginning of WickeIvorganges the spring strips 6 according to Figo 6 tordierto with continued winding operation is hereafter each of the spring strips 6 Figo 7 _Λ around the axis AA sharply bent according to in crease Similarly, · is obtained closing Iich for the bent inner Bndteile and for the adjoining it inner spiral spring turns after completion of the winding operation, a Image according to Fig. 8, which shows a top view _o

at
During / the method explained with reference to FIGS.

torsionally secure retention of the spring strips 6 in the through hole 2 by means of a particularly actuated clamping organ has been made 10, shows the Figo 9 is a I variant of the method, the no such clamping member 10 required This is made possible ₉ that the central through hole 2 to the number bands of springs 6 same number of outwardly pointing slots has the dimensions of which corresponds to the cross section _s of the profile be passed through spring strips 6

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Spreciieno Because of the star-like arrangement of the slots, a twist-proof entry of the spring strips is guaranteed without further measures, of which only two are shown in Fig. 9 for the sake of clarity this has been explained further above in connection with FIG. ₀ 1 "There is also a pronounced bend about an axis AA inclined to the longitudinal extension of the respective spring band at its inner end part in each of the spring strips 6,

Finally, all methods described have in common that the smallest possible inner diameter of the coil springs produced is limited only by the dimensions are through hole 2 ₀

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Claims (1)

rJ £? T $ ß'0DE 'Λ June 27, 1972 ^{| r?} File; P, 7282 Claims ^ elimination) 1.)) Process for the simultaneous production of several coiled coil springs, starting from one corresponding number of spring straps where first in a centric symmetrical arrangement to the central one Axis of a winding room the spring strips are inserted into this winding room, brought into contact at points of a first component adjacent to the central axis and at least on this component be fixed against longitudinal tension, the spring strips in guide slots of one of the central axis located further away from the central axis concentrically surrounding and peripherally delimiting the winding space second component are introduced, wherein the greater length of the spring strips protrudes outwards over the slots, then the second component around the central one Axis is rotated relative to the first component and here the spring strips while bending their to the contact points adjoining areas and under confiscation 209882/0132 " ^Ιχ - 1966439 st century their parts protruding outwards via the S hlitz are wound into one another in the winding space, characterized in that the provided spiral length of the springs, corresponding lengths of the spring strips, each by means of feed in their longitudinal extension through a through opening of the first .Bauteils adjacent to the central axis in the winding space can be introduced in a direction perpendicular or inclined to the intended winding plane and that the spring bands at an angle to their longitudinal extension Axes are bent. 2.) The method according to claim 1, characterized in that the spring strips are introduced into the winding space with their longitudinal extension obliquely to the central axis. 209882/0132 - in - 3.) Method according to claim. 2, characterized in that that the longitudinal extension of the triple-edged ligaments is skewed to the central axis in the changing room is brought in «, 4e) The method according to claim 3, characterized in that that the skewed feed is carried out so that its component I falling into the winding plane points in the direction in which the second component containing the guide slots moves relatively during the winding process for the first turned 5.) Method according to claim 3, characterized in that that the skewed feed is made so that its component falling into the winding plane opposite to the direction in which the second containing the guide slots during the winding process Component rotated relative to the first 6o) Method according to claim 1, characterized in that that the spring strips in a star-shaped arrangement in which their broad sides are essentially in -IV-209882/0132 1S66493 Radial planes of the central axis are introduced into the winding space. 7. ) Method according to claim 1, characterized in that the spring strips are introduced into the winding space in a polygonal arrangement in which their broad sides run in radial planes containing the longitudinal axes of the spring strip. 8.) The method according to claim 1, characterized in that the in the winding space The advanced lengths of the spring strips are only separated from the rest of the spring strip supply after they have been wound up will. 9.) The method according to claim 8, characterized in that that the separation of the spring strips in the changing room, leaving them in protruding end parts of the spring band supply takes place. 10 .; Method according to claim 8 or 9, d ad u r c h characterized in that the separation by inserting a cutting, punching or drilling tool in Direction of the central axis is made. 209882/0132 1966495 11o) procedure according to. Claim 8 or 9 »characterized in that that the separation by tearing off, caused by increased application of force in the relative The first to the second component is twisted at the points where the spring strips are attached to their Longitudinal extension oblique axes are bent " 209882/0132 to. Blank page