DK148572B - Wire magazine for winding wire for use in a winding machine for winding of protracted, preferably ring-shaped materials or cores - Google Patents

Description

148572 i

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a wire magazine for winding wire for winding elongate blanks or cores, preferably closed cores, for use in a winding machine comprising a machine frame with a magazine container comprising guide means and drive means for rotating movement of wire magazines, said wire magazine comprising two annular half pairs. each is composed of two half-annular portions separated by assembly faces, and together define a wire storage space whose cross-sectional area is substantially greater than the wire diameter, the two halves being separated by a rotary axis, rotating threaded end facing the wire magazine, through which from the wire magazine.

Thread magazines of the aforementioned kind apply to winding machines of the so-called 1-ring type or the so-called 2-winding type with direct winding, the extraction of the winding wire through a bottom slot permitting loading of winding wire into the magazine from the outside of the same in the same working process. .

20 with the same direction of rotation of the magazine as the winding operation.

In U.S. Pat.

2 974 890 known winding machine, the wire magazine is formed of two concentric rings, each having a circular cross section and arranged in contact with each other with a common axis of rotation. Particularly because of the following disadvantages, this known machine has not found practical use.

To enable selective thread extraction, the thread diameter must be large relative to the cross-sectional dimensions of the two magazine rings.

In order to avoid a pointed thread extraction angle, which causes the thread tension to be predominantly directed in a tangential direction with the risk of sliding the threads in the bottom slot, central positioning of the winding object relative to the wire magazine is required, which partly puts narrow limits on the size of the ring blanks which can be wound. , partly in conjunction with the requirements for the wire diameter, causes a poor residual hole relationship when winding ring cores.

As the magazine is opened on the outside and bounded only by the upper sides of the two magazine rings, 5 it is not possible to keep track of the thread stock after cutting the thread. It is then also stipulated that the loading of wire in the magazine is continued until the end of the winding operation, where a considerable unused wire consumption will be collected in the magazine, which must either be rewound or discarded.

From International Patent Application PCT / DK79 / 00008, Publication No. WO 79/00763, winding machines are known in which a wire magazine of the kind mentioned above is closed on the outside of a drive belt for rotation of the wire magazine or for a machine of the 2-ring type of a special brake strap for the wire magazine. Through this, better control of the wire storage after the cutting is possible, the cutting can be done before the end of the winding operation, so that the winding can be completed with the wire storage remaining in the magazine after the cutting.

However, the closure of the magazine requires a special design of drive or brake means for the wire magazine and is thus not applicable to 25 machines in which the wire magazine is driven by rollers, such as e.g. is the case of the above United States patent.

In addition, the magazine design must take into account that the magazine walls must provide safe installation for the drive or brake belt, whereby at the same time it is not possible to satisfy the desire for an optimal residual hole ratio for closed cores. In this regard, an optimal residual hole ratio would mean that the residual hole remaining in the core after its winding exceeds the cross-sectional area of the magazine's filamentary storage as little as possible.

Finally, in the prior art wire magazines, extra annular elements of flexible material often have to be used to delineate the bottom gap in order to achieve sufficiently good regulation of the thread tension and avoid chord extensions, which to some extent complicate and expensive the construction.

According to the invention, significantly improved properties for a wire magazine of the kind are obtained in that the two half-parts for producing a substantially closed storage room are thin-walled with a substantially semicircular cross-section and, apart from said bottom slot, are separated only by an opposite, circumferential thread. 10 filling slots, wherein the bottom slit walls are formed from facing surfaces on edge portions of the two halves, which surfaces are not plane parallel to the center plane perpendicular to the axis of rotation of the wire magazine. With the stated design of the magazine halves as thin-walled shells of semi-circular cross section, the best possible residual hole ratio is obtained, with only the small thickness of the magazine walls adhering to the cross-section of the wire storage.

The substantially closed form further ensures effective retention of the wire stock in the magazine after cutting the wire without, for that reason, requiring special execution of drive or brake means or the use of separate elements for closing the magazine. In addition, the closed version brings significant 25 occupational safety benefits.

Finally, the indicated design of the bottom slit provides a significantly improved security against slippage of the thread during the pull-out, even by displaced placement of the wrap object relative to the magazine and optimal possibility for proper control of the friction between the thread and the bottom slit walls and thus of the thread tension.

In particular, by using a wire magazine according to the invention in connection with a winding machine with interchangeable magazine cassette as referred to in Applicants' International Patent Application No. PCT / DK80 / 00058, good regulation is obtained.

In a preferred embodiment, characterized in that said edge portion of the half-parts 4 148572 forms flanges projecting against the axis of rotation to extend the radial extension of the bottom gap, through the increased radial extension of the bottom gap an increased friction surface between the thread and the gap walls 5 is obtained, which further improves the possibility. of the pull-out point, so that safety is achieved against the pull-out point simply moving forward in the bottom slot without the accompanying wire pull-out.

The non-planar shape of the bottom slot can be realized by the surfaces of said edge portions facing each other being corrugated in the circumferential direction of the magazine.

In this connection, the slit walls may have such an angular position that any axial plane through the axis of rotation cuts the bottom gap walls in straight lines parallel to the median plane perpendicular to the axis of rotation.

In this way, the opening of the bottom slit towards the axis of rotation will also have a longitudinal or sinusoidal course, which plays no role 20 for most winding tasks.

However, if, in connection with precision winding of cores for use in control resistors or transformers, the bottom slot is substantially in the median plane perpendicular to the axis of rotation, this can be achieved by the inlet of the bottom slot facing the storage compartment being corrugated in the circumferential direction of the magazine. The corner edges of said surfaces facing the axis of rotation lie in parallel planes perpendicular to the axis of rotation. The angular position of said flanges 30 with respect to the magazine halves hereby exhibits a sinusoidal variation around the circumference of the magazine.

However, if this complication is to be avoided, the opening of the bottom slit in one and the same plane perpendicular to the axis of rotation can be achieved by an alternative embodiment, which is characterized in that said edge portions overlap, their facing surfaces being substantially parallel. conical surfaces with a relatively small top angle.

5 148572

In order to facilitate insertion of wire into the magazine through the relatively narrow filling slot without the risk of wire damage, it is desirable that the walls of the filling slot follow conical surfaces which are symmetrical about the center plane perpendicular to the axis of rotation of the magazine. In practice, this can be practiced in a simple way by forming the walls of the filling slot against the magazine portions of the two half-parts bent over against the magazine storage room.

10 Corresponding to a corrugated configuration of the bottom slot, an improved closure of the filling gap in the above embodiment can be achieved by the tongue-facing edges of said edge portions being tongue-shaped. To obtain an effortless insertion 15 at this nearly closed slot, the magazine halves are positioned relative to each other such that the waveforms of the tongue-shaped edges are in co-phase.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail with reference to the accompanying drawings, in which: FIG. 1 shows a winding machine with a wire magazine according to the invention; FIG. 2 is a perspective view of one embodiment of the wire magazine; FIG. 3 is an unfolded view of a portion of the side facing the rotation axis of the wire magazine of FIG. 2, FIG. 4 is an exploded view of a portion of the side of the wire magazine facing away from the rotation axis of FIG. 2, FIG. 5 is a sectional view of one half of the wire magazine 30 seen from the inside of the magazine; FIG. 6-8 sectional views along the lines VI-VI, VII-VII and VIII-VIII of FIG. 3 and 4, FIG. 9 is an exploded view of part of another embodiment of the wire magazine according to the invention 35 seen from the interior of the magazine in the direction of the axis of rotation; FIG. 10 is an unfolded view of a portion of the same wire magazine on the exterior facing the axis of rotation; FIG. 11-13 sectional views along the lines XI-XI, XII-XII and XIII-XIII of FIG. 9, and FIG. 14 is a sectional view of a third embodiment of a wire magazine according to the invention.

5 The embodiment of FIG. 1 is of the kind referred to in the description of the applicant's International Patent Application No. PCT / DK80 / 00058 and should therefore only be mentioned in the main, with a more detailed explanation referring to said application.

10 In the winding machine, an annular core 1, held in schematically shown guide means 2, is wound with winding wire 3 by means of a winding wire shown in FIG. 1, only schematically shown, rotary wire magazine 4, comprising two annular halves, each composed of two parts separated by 15, 5 so that the magazine can be opened after a diameter for insertion and removal of the core 1. The magazine's two annular halves form together, a storage space for the winding wire 3 and separated on the outside of the magazine by a non-20 in FIG. 1, while the thread to be wound on the core 1 is pulled from the magazine through a not similar to FIG. 1, facing the bottom slot of the magazine axis. This configuration allows the loading of winding wire into the wire magazine 25 4 and the winding of the core can be done in one operation with the same direction of rotation and speed of the magazine 4.

In the shown winding machine, the wire magazine 4 is stored by means of guiding means not shown in a cassette 30 6, which can be interchangeably connected to the winding machine frame 7, in which drive means for rotating the wire magazine 4 include, inter alia, a pair of winding magazine engaging intermediate rollers 8. The winding machine frame 7 further includes actuators for opening 35 and closing the two pivotally embedded portions of cassette 6, as explained in the aforementioned international patent application, and thus of wire magazine 4. In addition, cassette 6's guide means 7 148572 for wire magazine 4 includes means for adjusting the system pressure. against the annular half portions of the magazine and thus regulating the tension in the thread 3 drawn from the magazine 4.

5 In the embodiment of FIG. 2-8, the preferred embodiment of the wire magazine according to the invention comprises the two annular half portions 9 and 10, each of which are composed of two, semi-annular parts separated by the connecting surfaces 5, 9a, 9b 10 and 10a, 10b respectively. As seen in the perspective view of FIG. 2, the half portions 9 and 10 are separated on the outer side of the thread axis rotation axis by the thread filling slot 11, while the side facing the opposite axis is separated by a 15 bottom slot 12 for extracting the winding thread.

For a more clear illustration of the invention, FIG. 3-8 show a series of views of the within a dotted frame of FIG. 2 lying part of the wire magazine. As shown in the sectional images of FIG. 6-8 20, the half-portions 9 and 10 of the invention are made of thin-walled, substantially semicircular cross-sections to produce a substantially closed storage space 13 if the walls of the half-parts 9 and 10, apart from the bottom gap 12 to 25, extend the winding wire alone. the thread filling slot 11 opposite the bottom slot.

As is most evident from the unfolded image of FIG. 3 of the face of the axis of rotation of the magazine, the walls of the bottom slot 12 are further formed in accordance with the invention of facing surfaces on "edge portions of the half portions 9 and 10, which surfaces are not plane parallel to the center plane perpendicular to the axis of rotation of the wire magazine. the embodiment shown forms the said edge portions as shown in FIG. 6-8 to the rotational axis projecting flanges 9c and 10c respectively, which extend the radial extension of the bottom slot 12 to obtain a larger friction surface for the winding wire passing through the slot.

In the illustrated embodiment, as seen in FIG. 3, the non-plane course of the walls of the bottom slot 12 obtained by the walls, in this case, the flanges 9c and 10c being corrugated in the circumferential direction of the magazine.

The waveform may be essentially a sinusoidal form in which amplitude and frequency are matched to the range of thread dimensions for which the magazine is determined, the rotation speed of the magazine, and so on.

In the embodiment shown, the flanges 9c and 10c 10, independently of the waveform, have such an angular position with respect to the magazine half portions 9 and 10 that any axial plane through the axis of rotation of the magazine as shown in FIG.

6-8 cut the walls of the bottom slot 12 in straight lines substantially parallel to the median plane perpendicular to the axis of rotation 15.

To facilitate the insertion of winding wire into the magazine, the filling slot 11, as shown in FIG. 6-8 are designed so that its walls follow conical surfaces which are symmetrical about the median plane perpendicular to the axis of rotation of the magazine, the walls of the filling slot being formed by the edge portions 13d and 10d of the two magazine halves 9 and 10, respectively, as shown in FIG. FIG. 5-8 an improved closure of the magazine 25 can also be obtained for the filling slot 11 in that the edges of the storage portions 9d and 10d facing the storage space 13 are tongue-shaped. The filling slot 11 is thereby viewed from the outside in a wave-shaped course, as seen in FIG. 4, in which the waveforms of the two tongue-shaped edges are co-phased to obtain an effortless wire insertion at the same time as the best possible blocking effect for the wire end after cutting the winding wire.

In the embodiment shown in FIG. 2-8, the corrugated bottom slit 12 causes the gap 12's opening 35 to also rotate toward the axis of rotation. For most winding tasks that occur in practice, the lateral oscillation of the winding wire during the threading between the magazine and the ring core 1 does not matter.

However, for some winding tasks, particularly in connection with the production of control resistors and transformers 5, the winding is desired to be timed with greater accuracy and for this purpose the wire magazine according to the invention with the arrangement shown in FIG. 9-13 are designed such that the opening of the bottom slot against the axis of rotation lies in one and the same plane, namely the center plane perpendicular to the axis of rotation 10 as seen in FIG. 10.. '

In this embodiment, the inlet from the magazine storage space 13 'to the bottom slot 12' between the two magazine halves 9 'and 10' has a corrugated course in the perimeter of the magazine in the same way as before. the entire bottom slot of the embodiment of FIG. 2-8. However, the flange portions 9c 'and 10c' of the magazine halves 9 'and 10', respectively, which in this embodiment define the bottom slot 11 ', are formed with a substantially sinusoidally varying angular position with respect to the magazine halves 9' and 10 ', seen in FIG. 11-13, whereby the opening of the bottom slot 12 'is obtained in FIG. 10 are straight lines.

The filling slot 11 'can in the embodiment 25 of FIG. 9-13 are designed in the same way as the filling slot 11 in the embodiment of FIG. 2-8.

However, as shown in FIG. 1, a rectilinear progression of the bottom slot opening toward the magazine axis of rotation. 14 is also obtained by overlapping the edge portions 9e and 10e 30 of the magazine halves 9 "and 10", which delimit the bottom gap 12 ", so that their facing surfaces forming the walls of the bottom gap 12" substantially parallel cone surfaces at a relatively small peak angle. Also in the embodiment of FIG. 14, the filling slot 11 "may be constructed in the same manner as explained with reference to Figures 2-8.

Claims (8)

The invention is not limited to the embodiments of the wire magazine shown in the drawing, in particular, both the filling slot and the bottom slot within the scope of the invention may have a configuration which differs from those shown. Likewise, the wire magazine is not limited to use in the disclosed interchangeable cartridge winding machine, but may also be used in winding machines where a magazine holder with guide means is firmly connected to the machine frame. PATE-NTKRAV A winding magazine for winding wire (3) for winding elongate blanks or cores (1), preferably closed cores, for use in a winding machine comprising a machine frame (7) with a magazine holder (6) comprising guide means and drive means for rotary movement of the wire magazine (4), the wire magazine (4) comprising two annular half portions (9, 10; 9 '; 10'; 9 "; ΙΟ'1), each of which is composed of two, separated by connecting faces (5) semi-annular portions (9a, 9b, 10a, 10b) and together define a wire storage space (13), whose cross-sectional area is substantially larger than the wire diameter, the two half portions being separated by one facing an axis of rotation of the wire magazine (4), circumferential bottom slot (12, 12 ', 12 ") through which winding wire (3) is removed from the wire magazine, characterized in that the two half-portions (9, 10; 9r, 10'; 9", 10 ") produce a substantially closed storage compartment (13) is the thin walls of substantially semicircular cross section and in addition to said bottom spacer lte (12, 12 ', 12 ") alone is separated by an opposite, circumferential thread filling slot (11, 11', 11"), the walls of the bottom slot (12, 12 ', 12 "). are formed from facing surfaces on edge portions (9c, 10c; 9c ', 10c'; 9e, 10e) of the two half-parts (9, 10? 9f, 10 '? 9 ", 10"), which surfaces are not are planar parallel to the center plane perpendicular to the axis of rotation of the wire magazine (4). Wire magazine according to claim 1, characterized in that said edge portions (9c, 10c; 9c ', 10c') of the half-parts form flanges projecting towards the axis of rotation to extend the radial extension of the bottom gap (12, 12 '). Wire magazine according to claim 1 or 2, characterized in that said edge portions (9c, 10c; 9c ', 10 10c') facing each other are corrugated in the circumferential direction of the magazine. Wire magazine according to claim 3, characterized in that any axial plane through the axis of rotation cuts the walls of the bottom gap (12) in straight lines which are substantially parallel to the central plane perpendicular to the axis of rotation. (Figs. 2-8). Wire magazine according to claims 2 and 3, characterized in that the bottom slot (12 ') facing the inlet of the magazine compartment (13') is corrugated in the circumferential direction of the magazine, while the corner edges facing said rotation lying in parallel planes perpendicular to the axis of rotation. (Figs. 9-13). Wire magazine according to claim 1, characterized in that said edge portions (9e, 10e) overlap, their facing surfaces being substantially parallel to conical surfaces having a relatively small top angle. (Fig. 14). Wire magazine according to one of the preceding claims, characterized in that the walls of the filling slot (11, 30 µl *, 11 '') follow conical surfaces which are symmetrical about the central plane perpendicular to the axis of rotation of the magazine. Wire magazine according to claim 7, characterized in that the walls of the filling gap (11, 11 ', 11'1) are formed by edge portions (9d, plumb) of the two half-parts (9, 10; 9', 10 ') folded against the magazine storage room. ; 9 '', 101 ').