DE3049404C2 - Method of winding electrical coils - Google Patents

Description

i / l =

Ul

M + AL

M + (X - A) L

15th

25th

A = ratio of the distance between the last turn of the winding and the one limiting flange to the distance between the two limiting flanges

L = number of turns per layer

and at opposite ά ·. η respective number of turns value (WX or W2) lower instantaneous value (M <W 1 or M <W2) in a further memory a reverse number of turns

connected comparator device (14) are connected.

5. Arrangement according to claim 4, characterized in that that in connecting lines between the memories (10, 11) and the comparator device (14) gates (12, 13) are inserted that'mit Through-switching signals each of one of the two position transmitters (4,5) are controlled.

6. Arrangement according to claim 4 or 5, characterized in that the comparator device (14) when compared to the respectively offered number of turns value (Wi or W2) smaller instantaneous value of the turn counter an activation signal to two logic circuits (15, 16) to determine the number of turns gives away

7. Arrangement according to claim 6, characterized in that the two logic circuits (15,16) are each controlled by one of the two position sensors (4,5).

8. Arrangement according to claim 6 or 7, characterized in that the logic circuits (15, 16) on the input side to the winding counter (7), and on the output side to a further comparator device (17) are connected.

9. Arrangement according to claim 8, characterized in that the further comparator device (17) is connected to the output of the winding counter (7)

30th

35

45

is written, from their subsequent coincidence with the instantaneous value of the winding counter a direction reversal signal for the wire guide is derived.

2. Arrangement for performing the method according to claim 1, characterized in that the determination of the number of turns values (Wi, W2) and the number of turns reversal (Ui, i / 2) underlying parameters (A, L) are applied to a data carrier is adapted to a data reading device inserted into the programmable control device.

3. Arrangement according to claim 2, characterized in that the data carrier contains data for determining the number of turns values (Wi ₁ W2) and the number of turns reversal (Ui, Ü2) .

4. Arrangement according to claim 2 or 3, characterized in that the outputs of the WSn ^ fertilizer containing memory (10, il) to an output of the winding counter (7). The invention relates to a method for winding electrical coils on a bobbin Limiting flanges according to the preamble of claim 1. It also relates to an arrangement for carrying out the method.

Electric coils are mostly wound on a bobbin with limiting flanges, from at least one of which is equipped with connection elements to accommodate winding wire ends. A wire guide is moved back and forth between the limiting flanges, reversing the direction of the wire guide in the opposite direction through two of the limiting flanges Position transmitter is caused, which influence a control device coupled to a winding counter.

In most electrical coils, the number of turns per winding is not an integral multiple the number of turns per layer of the winding. This means that the windings are not immediate at one of the two limiting flanges, but at any location between the two limiting flanges end up.

From DE-OS 28 30 644 a method is known that the bringing up of the last turn of a Winding directly in the area of the boundary surface that carries the associated connection element. In the context of this method it is provided that twice the number of turns in a memory for each length of the bobbin representing the number of pieces is entered and stored} a the number of still The instantaneous value of the winding counter representing the remaining turns to be applied is compared with the The contents of the memory are compared and a preparatory signal is derived from the coincidence, which is used in the following Arrival of the wire guide to which the connecting element

with A

and

elements-bearing limiting flange the query of the second instantaneous value of the still present there initiates the remaining turns to be applied. A will be used to indicate the number of people arriving after this applied turns registering the second turn counter after winding one of the half of the number of turns corresponding to the second instantaneous value, the direction of travel of the wire guide vice versa.

There are known coils in which the last turn of the winding should occupy a defined position between the two limiting flanges. Mostly these are coils with which an exactly defined field line course is to be generated; Examples of this are transmitter coils and deflection coils. Even in the case of coils with several windings comprising less than one layer and in the case of coils with bandages, the last turn is often not in contact with one of the limiting flanges. With the known method, however, only two defined layers of the last turn of the winding - the delimiting flange planes - can be achieved. It is conceivable to modify the known method in such a way that a position transmitter is also arranged at the defined location on the third turn of the winding and the operations carried out on the limiting flanges in the known method are also carried out when the thread guide reaches the third position transmitter Has. The installation of a third position transmitter in the area between the jj \

Limiting flanges, however, are considered to be a hindrance to freedom of movement when designing a Watch the winding machine and especially when guiding or guiding the wire between the supply roll and the winding mandrel. The provision of a third position transmitter would also f / 2

make it difficult to change the arrangement to adapt to other coil data, since in these cases a Change of the third position transmitter and an exact adjustment of the same would be necessary. One In practice, such adjustment requires a test run of several coils in order to empirically determine the defined position of the last turn of the winding.

So far, in practice, the last turn of the windings has reached defined end positions trial-wise variation of the feed has been achieved: this trial-wise change in the feed rate is on the one hand quite time-consuming and can also be annoying due to the changed pitch angle of the individual windings change the field course. It also turns out to be as annoying that every batch change or the usual tolerances of bobbins and wires already cause considerable deviations of the last turn of the winding from the desired nominal position can.

The invention is based on the object of providing a defined position for the last turn of the winding to be maintained between the two limiting flanges exactly and with simple means and at the same time one ! to achieve easy adaptation to changed coil data. The invention is based on the & o above-mentioned OS known method for winding electrical coils on a bobbin with Limiting flanges, with a wire guide that can be moved between the limiting flanges and one of two positioning signals assigned to the limiting flanges controllable control device for controlling the wire guide with a winding counter, its the number of remaining turns to be applied representing instantaneous value with one derived from the number of turns per layer Winding number value of a memory is compared.

The object on which the invention is based is achieved in that the comparison of the instantaneous value is initiated with the number of turns values when one of the position transducers responds, whereby the number of turns assigned to a position transmitter

Wi = (2-A) L

and the number of turns assigned to the other position transmitter

(\ + A) L

Ratio of the distance between the last turn of the winding and the limiting flange the distance between the two limiting flanges

L = number of turns per layer

is and compared to the respective value of the number of turns lower instantaneous value in a further spoke, a number of turns

M + AL

M + (1 - A) L

from its subsequent coincidence with the instantaneous value of the winding counter Direction change signal for the wire guide is derived.

With the method according to the invention, it is possible to precisely maintain the defined position of the last turn of the winding without additional structural effort and without a series of test windings with varied wire guide feed. This is essentially achieved by comparing the number of turns still to be applied each time the thread guide arrives at one of the limiting flanges with one of two stored values of the number of turns, and that when the number of turns falls below the values in a further memory, a reverse number of turns is written into another memory, when it is subsequently reached a direction ^{reversal signal 1 is issued} for the wire guide. The wire guide sounds a.sc- past the place intended for the last turn of the winding and, if the direction reversal signal occurs, is stopped before the next limiting flange is reached and its direction of travel is reversed.

With the method according to the invention, in particular, it is easy to adapt to different Coil shapes and dimensions or different windings are possible, since only the two Basis for the determination of the "number of turns and the parameters forming the number of reverse turns »ratio of the edge of the last turn of the Winding From the one limiting flange to the distance between the two limiting flanges from each other «

and "number of turns per layer" must be entered in the control device. this can be done with a mechanical control device, for example a keyboard. It is also conceivable that the parameters on which the definition of the number of turns and the number of turns is based are applied to a data carrier, which is inserted into the programmable control device Data reader is adapted. This is particularly advantageous if the Data carrier contains data for determining the number of turns and the number of turns. the actual control parameters and the numerical values obtained from them, from their comparison with the Instantaneous values of the winding counter control signals are derived, are therefore on a common data carrier, which also contains all other control data necessary for the control device may contain.

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The turns to be applied with the turn number values are preferably carried out in such a way that the outputs the memory containing the number of turns values to a memory connected to an output of the turn counter Comparator device are connected. The correct assignment of a number of turns value to the Position of the wire guide on the winding spindle is advantageously produced in that in Connecting lines are inserted between the storage units and the comparator device, gate circuits, each of which is controlled by one of the two position transmitters with switching signals.

The determination of the number of turns is expediently carried out in logic circuits; whose Control is preferably carried out in such a way that the comparator device in each case offered number of turns value smaller instantaneous value of the turn counter an activation signal outputs two logic circuits to determine the number of turns.

The assignment of the correct number of reverse turns to the value of the number of turns offered to the logic circuit can for example be done in such a way that the two logic circuits each from one the two positioners are controlled.

To determine the right time for the output of a reversing signal to the winding motor can, the logic circuits are on the input side connected to the winding counter and on the output side to a further comparator device. Of the direct comparison of the number of turns in reverse with the instantaneous value of the turns still to be applied is made possible by the fact that the further comparator device with the output of the winding counter connected is.

The winding counter can be mechanical or contactless from the rotating mandrel or the Bobbin controlled; when using stepper motors as a winding motor, the number of dem Stepper motor supplied pulses can be used as a measure of the number of turns. Similarly, for the position transmitter that this is mechanical or contactless in the area of the limiting flanges of the Coil bobbins can be switched and that also an indirect definition of the respective End position of the thread guide by counting the step pulses of one driving the thread guide Stepper motor is possible

The invention is explained below with reference to an embodiment shown in 3 figures. They show
F ig, Ϊ and 2 show the development over time of a winding with different defined layers of the last turn of the winding * In the

Fig.3 is an embodiment of an arrangement to carry out the method according to the invention shown.

In FIGS. 1 and 2, the displacement path of the wire guide between the two limiting flanges FX and FI is shown over a time axis and thus the course over time of the application of the winding to the bobbin. The end point of the winding,

ie the location of the last turn of the last layer of the winding is represented by the product AL · , where L is the number of turns per layer.

In Fig. 1 is upon arrival of the not shown Wire guide assigned to the flange Fl

2 for position — over a moment value of the still to be connected Windings have been determined that are smaller than the number of windings

IVl = (2-A) L
is. This becomes the number of turns in the reverse direction

i / l

M + AL

calculated, which leads to a reversal of the direction of travel of the wire guide at point t / l.

In a corresponding manner, in the exemplary embodiment on which FIG. 2 is based, when the limiting flange F2 was last reached, an instantaneous value of the turns still to be applied was determined which is smaller than the value of the number of turns

W2 = (\ + A) L
is. This becomes the number of turns in the reverse direction

_U2

A / + (I - A) L

determined; this leads to the reversal of the direction of travel of the wire guide at point i / 2.

With the arrangement shown in Figure 3 should a winding can be applied to a bobbin 1, which carries two limiting flanges 2. 3. The Limiting flanges 2, 3 are position transmitters 4, 5

so assigned that in each case at the moment in which a wire guide 6, only indicated schematically, reaches the location of the limiting flanges 2, 3, emit a signal characterizing the position of the wire guide 3. In a winding counter 7, by means of a setting device 8, the total number of _; . Turns of the winding entered. The rotation counter 7 is controlled by a clock generator 9, a defined number of pulses each corresponding to one revolution of the bobbin 1

In two memory devices (10, 11) are the Number of turns values

Wl = (2-A) LbZW. W2 = (1 + A) L

entered. Each time one of the two position transmitters 4.5 is triggered, one of two gate circuits is activated 12, 13 given a through-connection signal and thus at the same time the comparison of that present in the turn counter Momentary value of the still to be raised

Windings with the corresponding number of windings WX or Wl are initiated. If the comparison shows that the Mömenlanweft is less than the corresponding Winduhgszahiwert, a comparator device 14 outputs an output signal to two logic circuits 15, 16, which are also controlled by the output signals of the position transmitter 4,5,?) Ie with an Äusgangssignai a position transmitter 4, 5 fed logic circuit (15, 16) then gives aft its output a by means of the winding counter 7 carried momentfinweftes the

still to be applied turns certain reverse ^ turns off to a further comparator 17 whose other Eingäfigsebene is also connected to the output of Windungszählers 7 The second comparison means 17 is designed such that upon identity of the instantaneous Werle of ¹ still to be applied turns with that of a Both logic circuits transmitted reverse number of turns emits a switchover signal to a control circuit for the winding motor

1 sheet of drawings

130236/525

Claims (1)

Patent claims: 1. A method for winding electrical coils on a bobbin with limiting flanges, with a wire guide that can be moved between the limiting flanges and a control device that can be influenced by two position sensors assigned to the limiting flanges for controlling the wire guide with a winding counter whose instantaneous value representing the number of remaining turns still to be applied has an off the number of turns per layer derived value of the number of turns of a memory, characterized in that the comparison of the instantaneous value (M) with the number of turns (Wi, W2) is initiated when one of the position transducers responds, the number of turns assigned to the one position transmitter Wi = O-A) L and the number of turns assigned to the other position transmitter