JPS63236221A - Automatically insulation covering apparatus for enamelled wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic insulating coating device for enamelled wire, and more specifically, the invention relates to an automatic insulating coating device for enamelled wire, and more specifically, it coats a running conductor with insulating varnish and then bakes it to insulate the enameled wire. This invention relates to an automatic coating device for enamelled wire that applies insulation coating to wire.

[Prior Art] The most important thing when applying an insulating coating to a conducting wire is to make the thickness of the insulating coating formed on the conducting wire and the finished outer diameter of the conducting wire uniform over the entire length of the conducting wire.

For this reason, conventionally the amount of variation in the conductor diameter of enamelled wire is 1
・The thickness of the insulation coating is kept to 2 μm or less, and if the outer diameter of the enameled wire is made uniform, the thickness of the insulation coating will be made uniform.

Adjustment of the finished outer diameter of the enamelled wire, that is, adjustment of the thickness of the insulating coating, is generally carried out at two points, the beginning of winding and the end of winding, for a finished product coated with insulation and wound onto a bobbin. This was done by checking the finished outer diameter by the operator and adjusting the amount of insulating varnish applied to the conductor based on the operator's intuition or by determining the difference from the standard value.

However, with this method, the finished outer diameter of the enamelled wire,
In other words, the thickness of the insulating coating cannot be made uniform over the entire length of the enameled wire, and the amount of variation in the finished outer diameter of the enamelled wire, in other words, the amount of variation in the thickness of the insulating coating becomes extremely large. Put it away.

Therefore, as shown in Japanese Patent Publication No. 54-509,
After the insulating varnish has been applied and baked, the outer diameter of the enamelled wire while running is continuously measured, and when the measured value exceeds the specified upper limit or lower limit for a specified period of time, the insulation is determined. A device has been proposed that adjusts the amount of varnish applied in stages by a certain amount.

[Problems to be Solved by the Invention] However, such conventional devices have a drawback that the finished outer diameter of the enameled wire fluctuates at least between the upper limit and the lower limit. Furthermore, since the controlled amount is kept constant even though the variation in the finished outer diameter is not constant, if the finished outer diameter slightly exceeds the upper or lower limit, the controlled amount will be excessive and the finished outer diameter will fluctuate. becomes large.

Additionally, if the finished outer diameter greatly exceeds the upper or lower limit, the control will be repeated several times until the finished outer diameter reaches the target range between the upper and lower limits. ,
Another disadvantage is that it takes longer to reach the target range.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic insulation coating device for enameled wire that can eliminate the above-mentioned drawbacks of the prior art and make the finished outer diameter of the enameled wire extremely uniform over the entire range of the enameled wire. .

[Means for Solving the Problems] In order to achieve the above object, the automatic enamelled wire insulation coating device according to the present invention coats the running conductor with insulating varnish and then bakes it. In an automatic insulation coating device for enameled wire that applies insulation coating, an outer diameter measuring device that continuously measures the outer diameter of a running enameled wire after baking is completed and extracts the measured value as an electrical signal, and this electrical signal The difference between the average value of the outer diameter measurement values obtained within a predetermined time and the standard finish outer diameter setting value is extracted as a deviation output, and the insulation varnish is applied according to the difference output Q.
The present invention is characterized in that it is configured to include a control system that performs adjustment of the coating efficiency of the insulating varnish and prohibits readjustment of the coating ω of the insulating varnish within a predetermined time after adjusting the coating efficiency of the insulating varnish.

[Function 1 (a) In the automatic insulation coating device for enamelled wire according to the present invention configured as in (e), insulation is applied according to the difference between the measured value of the finished outer diameter of the enameled wire and the standard finished outer diameter setting value. Since the amount of varnish applied is adjusted, the finished outer diameter of the enameled wire, in other words, the thickness of the insulating coating, is made extremely uniform over the entire length of the enameled wire.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 4.

In FIG. 1, which schematically shows the overall configuration of the embodiment, a conductive wire W such as a hollow wire or a enamel wire is shown from a conductive wire feeder 1 before being coated with insulation. After being sent out and softened in an annealing furnace 2, the conductor is passed over a varnish coating roll 4, which is provided in a varnish coating tank 3 containing an insulating varnish and has an insulating varnish adhered to its surface. W. An insulating varnish is applied to the surface. Conductor W. Excess liquid is removed from the insulating varnish adhering to the conductive wire Wo by a squeezing felt 5, and the insulating varnish is evenly applied over the entire surface of the conducting wire Wo.

Then, the insulating varnish is baked on the conductor wire W in a furnace 6.

burnt onto the surface. For baking, the conducting wire W1 leaving the furnace 6 is run in a loop at a constant speed by a take-up capstan roll 7.7, and is then varnished again 110-.
The coil 4, the drawing felt 5, and the baking pass through the furnace 6 and the take-up capstan roll 7, and by repeating this process multiple times, an insulating coating of the required thickness is formed on the conductive wire W1. Then, the enameled wire W2 that has passed through the furnace 6 a plurality of times is wound up on the pobbin 8 after baking.

An outer diameter measuring device 9 using, for example, a laser beam is provided between the take-up capstan roll 7 and the bobbin 8.
When the enameled wire W2 passes through the outer diameter measuring device 9, the outer diameter of the enameled wire W2 is continuously measured, and the measured value is taken out from the outer diameter measuring device 9 as an electric signal. An electrical signal indicating the measured value of the outer diameter of the enameled wire W2 obtained from the outer diameter measuring device 9 is supplied to the controller 10.

The controller 10 controls the adjustment of the amount of insulating varnish applied to the conducting wire W1 by the adjustment mechanism 11 that controls the rotation speed of the varnish application roll 4 based on the electric signal obtained from the outer diameter measuring device 9, and Controls the generation of alarms by the alarm device 12.

In FIG. 2, which shows a control system whose main parts are formed by adding an adjustment mechanism 11 to a controller 10, an electric current obtained from an outer diameter measuring device 9 indicating a measured value of the outer diameter of an enameled wire W2 is shown. The signal is supplied to a control calculation circuit 13 in the controller 10 to correct microscopic variations in the outer diameter of the enamelled wire W2 and the measurement accuracy of the outer diameter measuring device 9 itself, and to compensate for variations in the control calculation circuit 13. In order to correct the measurement accuracy of the outer diameter measuring device 9 itself, the control calculation circuit 13 uses an enameled wire W.
The average value of the two outer diameter measurements within an arbitrarily settable predetermined time is determined as a representative measurement value.

Further, in the control calculation circuit 13, the mark 1tt-finished outer diameter of the enameled wire is set in advance, and the difference between the average value of (a)) and this standard finished outer diameter setting value is calculated. And the enamel obtained from this control calculation circuit 13! ! W
A difference signal between the average value of the outer diameter measurement values of No. 2 within a predetermined time and the standard finished outer diameter setting value is supplied to the deviation output generation circuit 14 in the controller 11 and converted into a DC voltage deviation output.

This DC voltage deviation output is supplied from one output terminal of the deviation output generation circuit 14 to the deviation output conversion circuit 15 in the controller 10, and is converted into a time proportional to the DC voltage value.
The time 1q in this deviation output conversion circuit 15 is transmitted to the adjustment mechanism 11 as an adjustment time, and the varnish application 0-
By controlling the rotational speed of the conductor W1
The finished outer diameter of the enameled wire W2 is controlled by adjusting the amount of insulating varnish applied to the enameled wire W2.

In this case, since it takes a predetermined time from the response of the varnish application roll 4 until the finished outer diameter of the enameled wire W2 becomes stable, the deviation output conversion circuit 15 uses a timer to adjust the varnish application process in consideration of this time delay. The configuration is such that readjustment of the amount of insulating varnish applied to the conductive wire W1 is prohibited within a predetermined period of time after the amount of insulating varnish applied to the conducting wire W1 is adjusted by controlling the rotational speed of the I-roll 4.

In addition, in the deviation horn generation circuit 14, arbitrarily settable upper and lower limit abnormal values are set in advance for the deviation output described in F obtained at one output terminal, and the deviation output described above is set in advance. An abnormality detection output is generated when the limit is exceeded even momentarily. This abnormality detection output is from the deviation output generation circuit 1.
4 is supplied to the alarm 12 and the adjustment mechanism 11 from the other output end of the alarm 12, and when the deviation output exceeds the upper or lower limit abnormal setting value even momentarily, the alarm 12 generates an alarm, and the adjustment mechanism 11 closes the conductor. Stop adjusting the amount of insulating varnish applied to W1. However, the varnish application roll 4 continues to rotate.

In FIG. 3 showing the output state of the deviation output, the vertical axis shows the finished outer diameter deviation axis, and the horizontal axis shows the deviation output axis. The deviation output V is zero when the average value of the finished outer diameter measurement value within a predetermined time is equal to the standard outer diameter setting value, and when it is larger than the standard outer diameter setting value, it becomes a positive voltage proportional to the difference. ,
When it is smaller than the standard finish outer diameter setting value, a negative voltage is generated proportional to the difference.

The upper limit abnormal value V8 and the lower limit abnormal value Vyt can be set to any level of this contract.

Note that the enamelled wire automatic insulation coating device according to the present invention includes:
It goes without saying that the embodiments are not limited to the embodiments described above, and that various modifications can be made without departing from the spirit of the embodiments.

For example, the deviation output that determines the control amount can be the sum of the differential deviation output and the integral deviation output, which reduces the time required for the finished outside diameter to return to the standard finished outside diameter setting value. There are advantages such as

Figure 4 shows the output state of the deviation output in this case, and the differential deviation output is only generated temporarily in response to a change in the average value of the finished outer diameter measurements. , integral deviation output I. is proportional to the product of deviation amount and time.

Further, the total deviation output T is the sum of the differential deviation output, the integral deviation output ID, and the total deviation output TD is used as the deviation output that determines the control amount.

Although the differential time and integral time may be set manually, it is preferable to use an automatic tuning method because there are many factors that cause variations in the finished outer diameter, and the variation a is not constant. .

[Effects of the Invention] As described above, according to the present invention, the finished outer diameter of the enameled wire is continuously measured, and the amount of insulating varnish applied is adjusted according to the difference between the measured value and the standard finished outer diameter setting value. Since we are adjusting
The finished outer diameter of the enameled wire can be made extremely uniform over the entire length, and a precision enameled wire with a uniform outer diameter of 11 or more can be obtained.

Additionally, by eliminating the need for manual adjustment by the operator,
It is possible to significantly streamline the enamelled wire manufacturing system.

In general, when a coil part is manufactured using the precision enamelled wire obtained by the apparatus according to the present invention, the dimensional accuracy of the coil part is improved, the electrical characteristics are improved, and the size of the coil part is reduced. can be achieved. Further, it is possible to reduce the number of man-hours required for adjusting the coil shape of the coil parts.

[Brief explanation of the drawing]

FIG. 1 is a diagram schematically showing the body structure of an embodiment of this invention, FIG. 2 is a block diagram showing a control system of an embodiment of this invention, and FIG. 3 is a diagram showing a control system of an embodiment of this invention. Diagram showing the output state of the deviation output FIG. 4 is a diagram showing another example of the output state of the deviation output. Wo, Wl...... Conductor wire W2... Enameled wire 9... Outer diameter measuring device 10... Control Device 11...Adjustment mechanism patent applicant Hitachi Cable Co., Ltd. Agent Koyama 1) Former husband Figure 1 Figure 2

Claims (2)

[Claims] (1) In automatic insulation coating equipment for enameled wires, which applies insulation varnish to running conductors and then bakes them, the outer diameter of the running enamelled wires is continuously measured after baking is completed. Then, an outer diameter measuring device extracts the measured value as an electric signal, and the difference between the average value of the outer diameter measured value obtained by this electric signal within a predetermined time and the standard finishing outer diameter setting value is extracted as a deviation output. A control system that adjusts the amount of insulation varnish applied according to the deviation output and prohibits readjustment of the amount of insulation varnish applied within a predetermined time after adjusting the amount of insulation varnish applied. An automatic insulating coating device for enameled wire. (2) In automatic insulation coating equipment for enamelled wires, which coats running conductors with insulating varnish and then bakes them, the outer diameter of the running enamelled wires is continuously measured after baking is completed. Then, an outer diameter measuring device extracts the measured value as an electric signal, and the difference between the average value of the outer diameter measured value obtained by this electric signal within a predetermined time and the standard finishing outer diameter setting value is extracted as a deviation output. The amount of insulating varnish applied is adjusted according to the deviation output, and readjustment of the amount of insulating varnish is prohibited within a predetermined time after adjusting the amount of insulating varnish, and the above deviation output is set to the abnormal setting value. An automatic insulating coating device for enameled wire, comprising: a control system that generates an alarm and stops adjusting the amount of insulating varnish applied when the amount exceeds even momentarily.