JP2000190068A - Electronic parts jointing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate necessity of a peeling-off operation of a heat resistant film by spontaneously jointing a bobbin terminal and a coil lead wire at a non-contact condition with an arc heat generated from an arc welding machine after a thin foil- or wire-like material formed of a copper phosphate brazing material is wound around a joint part as a joint auxiliary material, in a process for jointing electronic parts, in particular a bobbin terminal of a wirewound coil and a coil lead wire. SOLUTION: After a wirewound coil 1 covered with a joint auxiliary material 5 is mounted on a welding jig, one end of a terminal 2 covered with the joint auxiliary material 5 is used as a melting part, and an attachment position of an arc welding torch 7 is set in a way to make a slight clearance from a tip of the terminal 2 covered with the joint auxiliary material 5. During a welding operation, a pulse-formed current is arc-discharged in the clearance between the tip of the terminal 2 covered with the joint auxiliary material 5 and the arc welding torch 7. Then, the joint auxiliary material 5 is melted/ dipped/jointed across the entire connection part, where a coil lead wire 3 is wound around the terminal 2, so as to become under the jointing condition similar to the solder jointing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the joining of electronic components used in home electric appliances, industrial appliances and the like.

[0002]

2. Description of the Related Art A conventional method for joining electronic components will be described below with reference to the drawings.

FIG. 1 is an enlarged sectional view of a conventional electronic component in which one end of a wound coil terminal is joined by soldering.

In FIG. 1, a conventional winding coil is joined by:
A flux is applied to the joint between the terminal 2 and the coil lead wire 3 entangled with the terminal 2 included in the wound coil 1 and then immersed in a solder bath containing molten solder for connection or soldering. A method is used in which thread solder is supplied to the iron tip and the terminal 2 to join them.

[0005] The solder 4 melted at the time of solder joining penetrates into the terminal 2 and the coil lead wire 3, and the entire joint becomes a solder-plated shape.

[0006] Alternatively, fusing welding in which a joint is pressurized and energized by an electrode using a resistance welding power source is used.

[0007]

However, when the insulating film of the coil lead wire 3 is a heat-resistant insulating film, direct solder bonding cannot be performed. In this case, there is a problem that when the mechanical stripping is performed, insulation failure occurs due to the disconnection of the coil lead wire 3 or the uneven stripping length.

[0008] In addition, in the case of peeling with a chemical, there is a problem that, in addition to the adverse effect of the chemical on the human body, a cleaning operation of the component is required, and if the cleaning is not sufficient, the component is deteriorated. Was.

Further, in the case of fusing welding, since the terminal 2 and the coil lead wire 3 are directly pressed by the electrode, the coil lead wire 3 is disconnected at the time of pressurization, or a certain amount of electrode enters due to the structure of the fusing welding machine. Since space is required, there is a problem that the shape and size of the coil terminal that can be joined are limited.

The present invention solves the above-mentioned problems, and eliminates the need for stripping the heat-resistant coating. Therefore, disconnection of the coil lead wires, defective insulation due to uneven stripping lengths, adverse effects on the human body, parts It is an object of the present invention to provide a method for instantaneously joining coil terminals having a wide range of shapes and sizes, while preventing deterioration of the coil terminals and eliminating the need for a cleaning operation of parts.

[0011]

In the joining step of the terminal and the coil lead wire according to the present invention, a thin foil or a wire made of phosphorous brazing is wound around the joining portion as a joining auxiliary material. Alternatively, the joint can be instantaneously joined in a non-contact manner by using an arc heat generated by an arc welding machine after covering the joint with a sleeve made of a phosphor copper braze and a cap-shaped workpiece. .

According to the above configuration, even if the coil lead wire is a heat-resistant coating, the terminal and the coil lead wire can be joined without performing a peeling operation.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described below with reference to the drawings. FIG. 2 shows a coil lead wire 3 on a terminal 2.
FIG. 6 is an enlarged cross-sectional view of a case where the upper part is covered with a joining auxiliary material 5 formed of a phosphor copper braze and welded.

Prior to the welding operation, a connection auxiliary material 5 made of a phosphor copper brazing is covered on a connection portion where the coil lead wire 3 is entangled with the terminal 2 as shown in FIG. As a method of covering the connecting portion with the joining auxiliary material 5, a thin foil or a linear object is wound, a sleeve,
Cover with a cap-shaped object.

In FIG. 3, after the winding coil 1 having the joining part covered with the joining auxiliary material 5 as described above is mounted on a welding jig, one end of the terminal 2 covered with the joining auxiliary material 5 is used as a fusion part. Also, a ground 6 is taken from one end of the same terminal on the opposite side by a contact probe or the like. The mounting position of the arc welding torch 7 is set so that a slight gap is opened between the tip of the terminal 2 covered with the joining auxiliary material 5.

At the time of welding, a pulsed current is arc-discharged in a gap between the tip of the terminal 2 covered with the joining auxiliary material 5 and the arc welding torch 7, and the arc heat generated at that time causes the joining auxiliary material 5 to be connected to the terminal. 2 is melted and penetrated into the entire connection portion where the coil lead wire 3 is entangled with the coil 2 to be joined, so that a joining state similar to solder joining is obtained.

Furthermore, although the electronic component in the embodiment of the present invention uses a wound coil, a motor, a solenoid,
It can also be applied to electronic components such as instruments, sensors, medical equipment, and bulbs.

[0018]

As described above, in joining the terminal and the coil lead wire according to the present invention, since the copper brazing is used as a joining auxiliary material, the work of peeling off the heat-resistant coating can be reduced.

In addition, since an arc welding machine is used as a heat source for joining, high-temperature heat can be generated in a local non-contact manner very instantaneously. It can be widely applied to the shape and size of coil terminals.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view when one end of a wound coil terminal of a conventional electronic component is soldered.

FIG. 2 is an enlarged cross-sectional view of a joint at one end of a coil terminal according to the embodiment of the present invention.

FIG. 3 is a diagram showing a structure around a winding coil terminal at the time of the same joining;

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01F 41/10 H01F 41/10 C

Claims (2)

[Claims] In a joining process of an electronic component, in particular, a bobbin terminal of a winding coil and a coil lead wire, a thin foil or a wire made of a phosphor copper braze is wound around a joining portion as a joining auxiliary material. In this method, non-contact and instantaneous joining is performed using arc heat generated by an arc welding machine. 2. The joining method according to claim 1, wherein a material obtained by processing the joining auxiliary material into a sleeve or a cap is covered on the joining portion.