JPS62281313A - Manufacture of small-sized precise coil - Google Patents

Abstract

PURPOSE:To obtain excellent lubrication at the time of winding process and functions based on excellent thermal stability which prevent the corrosion of a copper wire and the failure of an electric contact, by spreading a fluorine system oil on the surface of a fine enamel wire cleared of adhesion matters and, at the same time, performing the winding process of a small-sized precise coil. CONSTITUTION:Two sheets of felt 16 impregnated with a fluorine system oil are pinched at a spreading part 5. An enamel wire 9 drawn out from an enamel wire bobbin 3 is passed between a pair of wiping felts 13. Thereby a paraffin system mineral oil spread in the manufacturing process of the enamel wire 9 is wiped off. By passing between a pair of felts 16 impregnated with fluorine system oil, the surface of the enamel wire 9 can be covered with an extremely thin lubricating oil film. Consequently, the friction resistance of rollers 6A and 8 and a coil bobbin 2 in the winding process is reduced, so that the disconnection of the fine enamel wire 9 in the winding process, the increase of an electric resistance due to expansion of the enamel wire, the generation of kink due to tangle of the enamel wire, etc. can be prevented.

Description

Detailed Description of the Invention 6. Detailed Description of the Invention [Technical Field to which the Invention Pertains] The present invention provides a small ff'? E-coil manufacturing method, especially breaking of enameled wire during winding work
This invention relates to a manufacturing method that prevents such problems.

[Prior art and its problems]

For ultrafine enameled wires with a wire diameter of 100 μm or less, such as oil-based enameled wire, formal wire, polyester enameled wire, and silicone enameled wire, the tensile breaking load is 200 μm or less.
Because the tensile strength is extremely low at less than 98 degrees, wire breakage due to the tension applied to the enameled wire during winding work, increased conductor resistance caused by stretching the enameled wire, damage to the enamel film (occurrence of pinholes and cracks), Alternatively, in order to prevent the occurrence of kinks due to entanglement of the enameled wire, during the manufacturing process of the enameled wire, the surface of the enameled wire is coated with paraffin mineral oil before being wound around a wire bobbin and shipped. By performing winding work using enameled wire that has been treated with lubricant in this way, small precision coils can be fabricated without problems such as breakage of the enameled wire, performance deterioration, or occurrence of kinks. . However, paraffin mineral oil adhered to the surface of the enamel coating of the small precision coil incorporated in the electromagnetic relay! In this state, the temperature of the coil increases due to the excitation current that is repeatedly passed through the coil, so
Paraffinic mineral oil attached to the coil gradually oxidizes and deteriorates to produce carboxylic acid, and the oxidized paraffinic mineral oil penetrates into the conductor side through defects such as pinholes and cracks in the enamel film, resulting in copper There are drawbacks such as wire breakage due to wire corrosion. In addition, as the temperature of the coil increases, the paraffinic mineral oil gradually evaporates, deposits a layer on the electrical contacts near the coil, and is carbonized by the contact arc, causing the contact resistance between the contacts to gradually increase. However, there is a drawback that the on/off performance of the electromagnetic relay is reduced, and improvements are required from the viewpoint of maintaining the reliability of the electromagnetic relay.

[Purpose of the invention]

The present invention was made in view of the above-mentioned situation, and is a compact precision machine that provides excellent lubricity during winding work and the ability to prevent copper wire corrosion and electrical contact failure based on excellent thermal stability. The purpose of the present invention is to provide a method for manufacturing a coil.

[Key points of the invention]

In the present invention, fluorine-based oils such as half-0ropolyether and perfluoroalkyl ether have excellent lubricity and relatively low viscosity, and are suitable for attaching a small amount to the surface of enameled wire to improve lubricity. In addition, paraffin-based The kinematic viscosity is 1 to 50C on the surface of the ultra-fine enameled wire that has been cleaned of deposits such as mineral oil.
The structure allows winding of a small precision coil to be performed while applying ST (centistokes) fluorine oil, which prevents disconnection of the ultra-fine enameled wire due to frictional resistance on the surface of the enameled wire, increased electrical resistance, and kick. This prevents problems such as corrosion of the copper wire and poor contact between contacts during use.

[Embodiments of the invention]

The present invention will be explained below based on examples.

FIG. 1 is a schematic structural diagram of a winding device for a small precision coil showing an embodiment of the present invention, and FIG. 2 is an enlarged view of the main part of FIG. 1. In the figure, a wire with a diameter of 100 mm is placed on 10 frames.
The enameled wire 9 is pulled out from the enameled wire bobbin 3 on which the ultrafine enameled wire 9 of micrometer or less is wound through the pull-out hole 1B formed in the cover 1, and the enameled wire 9 is pulled out from the mount 1.
A wiping section 4 and a fluorine oil application section 5 supported via a support fitting 14. and roller 6 of tension adjustment part B
The winding machine 70 is guided by a guide roller 8 and wound onto a coil bobbin 2 of a small precision coil.
As shown in the detailed structure in FIG.
but.

In the coating section 5, two pieces of felt 16 impregnated with fluorine-based oil are held between each other, and the enamel a! 9 is a pair of cleaning felt 16
The paraffin-based mineral oil applied during the manufacturing process of the enameled wire 9 is wiped off by passing between the pair of fluorine threads and the oil-impregnated felt 16. , the surface of fJ9 can be covered with an extremely thin lubricating oil film, which reduces the frictional resistance on the rollers 6A and 8 and the coil bobbin 2 during the winding operation. Breakage of wire 9, stretching of enameled wire K
It is possible to prevent an increase in electrical resistance due to this, and the occurrence of kinks due to entanglement of enameled wires. Fluorine-based oils also have much better thermal stability than paraffin-based oils,
Since thermal deterioration due to temperature rise in small precision coils can be almost completely eliminated, the problem of conventional technology in which thermally deteriorated paraffin mineral oil penetrates into the copper wire through defects in the enamelled wire and corrodes the copper wire can be avoided. It can be almost completely avoided, and even if fluorinated oil adheres to the contacts of an electromagnetic relay and is exposed to a contact arc, carbides will not be generated, and electrical contact failures due to carbide formation between the contacts will be prevented. Since the fluorine-based oil layered on the contact noble side functions to prevent wear of the contacts, an electromagnetic relay having excellent contact reliability can be obtained.

By using perfluoroalkyl ether as a fluorine-based oil, Bar 70 ROBOLIETEL MATA has superior thermal stability compared to other fluorine-based oils containing chlorine groups, hydrogen groups, etc., and is less corrosive to conductors. It is possible to obtain a small IF coil which has a small amount of carbonization caused by contact arcing, and which has fewer side effects due to thermal decomposition of fluorine oil.

〔Effect of the invention〕

As mentioned above, the present invention is suitable for manufacturing small precision coils for electromagnetic relays using ultra-fine enameled wires, which have a very thin wire diameter of 100 μm or less, so the tension that can be applied during winding work is low, on the order of 1009 or less. The winding operation was performed while applying fluorine-based oil having a kinematic viscosity of 5[] Cst or less to the surface of the enameled wire. As a result, the excellent lubrication effect of fluorine-based oil can reduce the tension applied to the enamelled wire during winding operations, thereby preventing the enameled wire from breaking due to the tension applied to the enameled wire.

Manufacture of small precision coils that can efficiently wind small precision coils with excellent performance, which can prevent increases in electrical resistance due to conductor stretching and defects such as pinholes and cracks in the enamel coating. method can be provided. In addition, the thermal stability and contact arc resistance of fluorine-based oil are significantly superior to conventional paraffin-based mineral oil), and the enamel film is less damaged during wire winding work. Corrosion of conductors and poor contact between contacts, which have been problems in the technology, are eliminated, and a compact precision coil with high long-term reliability can be economically advantageously provided.

[Brief explanation of drawings]

FIG. 1 is a schematic structural diagram of a winding device showing an embodiment method of the present invention, and FIG. 2 is an enlarged view of main parts of the embodiment device. DESCRIPTION OF SYMBOLS 1... Frame, 2... Coil bobbin, 6... Enamel wire bobbin, 4... Cleaning part, 5... Application part, 6...
・Tension adjustment section, 6A, 8...Guide roller, 7...
Winding machine, 9... Extra-fine enameled wire, 14... Supporting metal fittings, 1°2, 15... Clamp, 13... Wiping felt, 16... Fluorine thread oil-impregnated felt. Figure 1 Figure 2

Claims (1)

[Claims] 1) A method for manufacturing a small precision coil for an electromagnetic relay by winding an ultra-fine enameled wire, the winding being performed while applying fluorine-based oil to the surface of the wiped enameled wire. A method for manufacturing a small precision coil characterized by the following. 2) A method for manufacturing a small precision coil according to claim 1, characterized in that the fluorine-based oil is perfluoropolyether. 3) A method for manufacturing a small precision coil according to claim 1, characterized in that the fluorine-based oil is perfluoroalkyl ether.