DK148858B - WRAPPING MACHINE WITH WIRE COLLECTION ORGANIZATION - Google Patents

Description

148853

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a winding machine for winding closed, substantially annular cores, comprising guide and drive means for rotatably supporting and advancing a core to be wound, about its own axis in a first plane and a substantially annular wire guide member, and and drive means for rotating movement of the thread guide in a winding plane perpendicular to said first plane, such that the path of movement of the wire guide encloses the cross-section of the core, the machine for generating outlets from a winding during the winding operation comprising a take-out generating unit with a hook-shaped wire catching member, oscillation in a plane perpendicular to the winding plane.

When winding annular cores for use e.g.

15 in transformers, one or more outlets from one or more sub-windings which are applied to the core usually have to be established. Such outlets often have to be produced not only at the ends of a continuous winding, but also at one or more places within the winding, e.g. by producing windings with midpoint outlets.

With the use of conventional winding machines of the type specified, for generating outlets, reference has been made to halt the winding operation and manually take out a loop of the wound thread and retain it during the application of a number of subsequent turns.

In addition to prolonging the duration of the winding operation, the necessity of such manual interventions constitutes a significant obstacle to the automation of winding operations of the kind in question.

30 From US Patent No. 4,272,033, it is known to design an outlet generating unit in a winding machine with a hook-shaped thread-catching member which is constantly rotating and housed in a housing which is pivotally about one with the winding plane parallel axis when a cam means 35 in the mechanical transmission over which the permanent rotation of the thread-catching means is actuated activates a spring-actuated push rod.

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Thus, the activation of the wire-catching means by this known device occurs forcibly and not selectively. Furthermore, the structure of the device is complicated and the possibilities of convenient placement are limited by the fact that the device comprises a gear transmission which must be coupled to a drive means in the winding machine.

It is an object of the invention to provide a winding machine of the kind specified with a selectively actuated outlet generating unit with which outlets can be provided at any, if any, preprogrammed locations on a winding and wherein the outlet generating unit has an independent actuator which does not require coupling to a drive member in a drive means. .

This is achieved according to the invention with a design of a winding machine of the specified type, characterized in that the output generating unit comprises a pivot shaft mounted for pivoting about a pivot axis parallel to the winding plane between a resting position and an active position. and that the wire catching means is mounted pivotally about said pivot shaft so that in the active position of the pivot shaft it is pivotable between a catch position in which it engages the winding plane and an outside position of the winding plane in which the pivot shaft of a first biasing member is actuated. in the direction of the rest position, and the wire catching means is actuated by a second biasing means towards the catch position in the active position of the pivot shaft, and the pivot shaft by a self-actuating means is selectively activatable for pivoting from the rest position to the active position against the effect of the first biasing means to which the actuating means is controlled retaining the pivot shaft in the active position for a prescribed unloading period after the wire catching means is moved against the influence of the second biasing member 35 from the catching position to the holding position due to tightening of the winding trapped in the catching position.

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The invention can be applied to all types of winding machines of the type mentioned initially, regardless of whether a wire guide member of the type to be charged with winding wire prior to the winding operation is used, or a wire magazine with simultaneous removal of winding wire through a bottom slot and loading wrap wire through an insertion slot during rotation of the magazine in one and the same direction.

Also, the invention can be applied to both single-ring machines in which the wire guide is constituted solely by a wire magazine as in so-called towing machines, the wire guide means comprising a separately driven wire feed ring and a coaxial wire magazine rotating in the same direction as the wire feed ring. of its rotation.

However, the advantages of the invention towards a higher level of automation are expressed in particular by winding machines, which also, in other phases of a winding operation, work with extensive automation without the need for manual intervention, e.g. a winding machine of the kind disclosed in International Patent Application No. PCT / DK80 / 00058, International Publication No. W081 / 00841.

The invention will now be explained in more detail below with reference to the schematic drawing, in which fig. 1 as an embodiment of a winding machine according to the invention shows a side view of a winding unit for a single ring machine; FIG. 2 is a sectional view taken along line II-II of FIG. 1, 30 FIG. 3 is an axial section through an embodiment of a wire-catching means with associated actuating means; and FIG. 4-6 details of the embodiment of FIG. 3.

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The FIG. 1 and 2 illustrate the invention in connection with an advanced automation single ring winding machine of the kind disclosed in the aforementioned international patent application.

FIG. 1 and 2 show only the parts necessary for understanding the invention of such a winding machine. The wire guide means is an annular wire magazine 1 which is rotatably mounted in a cassette unit 2 and rotates about its own axis in the direction indicated by an arrow 3. The cassette unit 2 is coupled to a winding machine (not shown) which contains drive means for rotating the wire magazine and other control and operating means, as explained in the aforementioned international patent application.

Wire magazine 1 is of the kind in which winding wire loading takes place through a not shown slot in the side of the wire magazine facing away from the axis of rotation in the same operation as removing wire for winding a core through the core shown in FIG. 2, the bottom slot 4 shown. be of the kind referred to in International Patent Application No. PCT / DK80 / 00057, International Publication No. W081 / 00840.

The workpiece to be wound may, as shown, be constituted by an annular iron core 5, which is housed in a support arrangement 6 shown only diagrammatically, in such a way that during the winding operation it can perform a pivotal movement in a plane 7 which stands perpendicular to the winding plane determined by the rotation plane 8 of the magazine 1.

Both the cassette 2 and the wire magazine 1 are openly arranged to position the core 5 such that its cross section is enclosed by the movement path of the magazine 1 in the winding plane 8.

During rotation of the wire magazine 1, the winding wire 9 removed from the bottom slot 4 will be guided 5 around the winding plane 8. In FIG. 1, at 9a, 9b and 9c, three different positions of the winding wire 9 are shown during one revolution.

In order to produce a winding with a prescribed number of turns, the wire magazine 1 must perform a corresponding number of turns, with each turn putting a twist on the core 5. At the same time, a length of the wire 9 corresponding to the magazine length is recorded in the wire magazine 1. Thus, for each revolution, light wire excess corresponding to substantially the difference between the magazine peripheral length and the core network circumference is recorded in the magazine. In this way, when a sufficient wire length for the desired winding is inserted into the magazine 1, the wire 9 is cut without interrupting the rotation of the magazine 1, which is continued until the wire stock in the magazine is used up, so as to avoid wastage of winding wire.

For generating outlets at one or more arbitrary locations on a winding, a hook-shaped wire capturing means 10 is mounted for pivoting about a axis 11 parallel to the winding plate 8. By actuation with an actuating force which can be produced by a selective operating operation or by program control. , the wire-catching means 10 is caused to perform a pivotal movement against a first biasing force of the one shown in FIG. 2, resting position 10a, located outside the winding plane 8, to a position 10a in FIG. 6 shows catch position 10b in which it engages the winding plane 8 to catch a winding of the wire 9, as seen in FIG. 1. As the tension 9 of the wire 9 is sustained by the rotation of the wire magazine 1, the thread-catching member 10 will be guided to a position shown in FIG. 6, which lies between the resting position 10a and the catching position 10b, against another biasing force acting in the opposite direction and less than the first biasing force. After assuming the holding position 10c, the thread-catching means 10 is maintained by maintaining the actuation force for a unlocking period of a duration of a few further turns of the wire magazine 1.

The wire catching means 10 is mounted on a stationary plate-shaped bracket 12 which is not connected to a fixed part of the winding machine 10, not shown.

Pig. 3 shows an enlarged axial section of the wire catching means 10 with associated actuating means.

In the illustrated embodiment, the wire catching means 10 is pneumatically actuated in that the bracket 12 comprises two airtightly compressed plates 12a and 12b, between which is formed a pressure chamber 13, which communicates through a duct 14 with a connection nipple 15, such as for example. through a hose is connected to a source of compressed air in the winding machine.

A shaft 16 rotatable about the pivot axis 11 has end portions 17 and 18 which are rotatably supported by radial bearings 19 and 20 in an upper and lower bearing bracket 21 and 22. Between the end portions 17 and 18, the shaft 16 has an eccentric center portion 23, 25 on which the thread-catching means 10 is pivotally mounted by means of a radial bearing 24.

In the immediate axial extension of the thread-catching member 10, on the eccentric center portion 23 of the shaft 16 is attached a circular sector-shaped driver 30, which, as shown in FIG. 6 on a portion of its circular outer edge has a cutout 26 which engages a carrier pin 27 attached to the threading member 10. The cutout 25 is restricted to the ends of radial edges 26a and 26b, which in the activated state of the threading member 10 forms abutments for the carrier pin 27 respectively in the catch position 10b and the holding position 10c.

In addition, for turning the shaft 16 a thread-catching means 10 prescribed for moving the shaft member 10 from the resting position 10a to the catching position 10b, on the eccentric middle part 23 of the shaft 16, a plunger rod member 29, 5 formed at the end of a shaft member 29 is also mounted. working piston 30, which, through a bore 31 in the bracket plate 12a, communicates with a diaphragm 32 which forms one wall of the pressure chamber 13.

In the deactivated state, the shaft 16 is actuated to assume a position corresponding to the resting position 10a of the wire catching means 10a by means of a first biasing force produced by a position shown in FIG. 4, whose ends are secured in slots formed respectively in the upper end portion 17 of the shaft 16 and in a collar 34 on the upper bearing bracket 21 so that the biasing force acts in the direction indicated by an arrow 35.

Upon supply of compressed air to the pressure chamber 13, the diaphragm 32 is deflected and the working piston 30 is actuated 20 so that it, together with the connecting rod link 28, is moved from the one shown in FIG. 5 shows a fully drawn rest position in which the axial symmetry plane 16 'of the shaft 16, i.e. the plane through the axes of both the end portions 17 and 18 and of the eccentric center portion 23 is substantially parallel to the plate bracket 12, to the dotted position in which said symmetry plane 16 "is substantially perpendicular to the plate bracket 12. The shaft 16 is rotated in this movement about 90 ° to the first biasing force shown by arrow 35.

30 In order to produce a second biasing force, a coil spring 36 is anchored with one end thereof in the carrier means 25 and with its other end in engagement with the carrier pin 27 fixed in the threading means 10. As shown by an arrow 37, the other 35 biasing force acts in the opposite direction. direction of the first biasing force shown by arrow 35, i.e. in the same direction as the shaft 161 s angular rotation from the resting position to the activated position. Furthermore, the second biasing force is less than the first biasing force acting on the shaft 16 and thus on the carrier means 25.

Therefore, in the resting position 10a and the catching position 10b 5, the driving pin 27 will abut against the edge 26a of the carriage member 25 cut out in the rotation direction of the shaft 16, due to the biasing force shown by arrow 37.

However, when the wire catching member 10 is brought to the catching position 10b engaging in the winding plane 8, thereby capturing a loop of the wire 9, the tension of the wire 9 produced by the wire rotation 1 will continue to overcome the second biasing force, thereby bringing the wire catching means 10 15 the holding position 10c outside the winding plane 8, in which the carrier pin 27 abuts against the opposite edge 26b of the carving member 25's cutout 26.

Accordingly, it is avoided that the trapped loop 20 of the wire 9 is wound over with the subsequent turns.

The actuation force can be selectively generated by manual operation when a certain number of turns are applied to the core 5, in which case a timing link may be attached to the actuating means to maintain the actuation force during the prescribed binding period. However, in automatic operation, it is preferable to generate the activation power of program control through setting a counter for the number of applied turns to output an activation signal in one or more desired counter positions.

In the described embodiment with pneumatic actuation, the actuation signal can affect a solenoid valve in the connection between the aforementioned compressed air source in the winding machine and the pressure chamber 13.

However, instead of the pneumatic actuation described, other actuation modes, e.g. hydraulic or electromagnetic actuation apply.

Claims (2)

148858 A winding machine for winding closed, mainly annular cores, comprising guiding and driving means (6) for rotatably supporting and advancing a core (5) to be wound about its own axis in a first plane (7) and a substantially annular wire guide member (1) and rotary movement control and drive means of the wire guide member (1) in a winding plane (8) perpendicular to said first plane (7) such that the path of movement of the wire guide member (1) encloses the core (5). cross-section wherein the machine for generating outlets from a winding during the winding operation comprises a tapping generating unit with a hook-shaped thread-catching means (10) mounted for pivoting in a plane perpendicular to the winding plane (8) characterized in that the tapping generating unit comprises a pivot shaft (16) mounted for pivoting about a pivot axis parallel to the winding plane between a resting position and an active position, and the thread capturing means (10) being pivotally mounted about said pivot shaft (16) so that the active position of the pivot shaft (16) is pivotable between a catch position (10b) in which it engages the winding plane (8) and an outside position of the winding plane (8) (10c), wherein the pivot shaft (16) is actuated by a first biasing member (33) in the direction of the resting position and the thread catching means (10) is actuated by a second biasing member (36) in the direction of the catch position (10b) of the pivot shaft ( 16) active position, and the pivot shaft (16) by means of an independent actuator (30) is selectively actuable to pivot from the rest position to the active position against the action of the first biasing means (33), which actuator is guided to hold the pivot shaft ( 16) in the active position for a prescribed unloading period, after the thread-catching means (10) is moved against the action of the second biasing means (36).