JPH0577064A - Ultrasonic welding method - Google Patents

Abstract

PURPOSE:To enable reduction of operating stages and simplification of a device and control at the same time differently from a case of melting insulation films by an electrode bar used only for melting since melting of an insulation film and welding of a conductive foil to an electric conductor are performed simultaneously by the frictional heat generated ultrasonic wave vibration. CONSTITUTION:This is a welding method to spot weld a conductive tape C made by laminating an insulation film B on the conductive foil A to an electric conductor D, first of all, a conductive tape C is superposed an the conductor D so that the insulation film B comes in contact with one surface of a conductor D, then, the surface of the conductive foil A of the conductive tape C is pressed by a pressure surface 4a of an ultrasonic phone 4 and ultrasonic vibration is given to the ultrasonic phone 4 to slide the conductive tape C to the conductor D to melt insulation film B and to spot weld the conductive foil A to the conductor D at the same time as an ultrasonic welding method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic welding method which utilizes ultrasonic vibration when spot-welding a conductor on a conductive tape having an insulating film laminated on a conductive foil.

[0002]

2. Description of the Related Art Usually, when a conductor is spot-welded on a conductive tape formed by laminating an insulating film on a conductive foil so that the insulating film contacts the conductor, it is necessary to remove the insulating film at the welded portion. There is.

Conventionally, when the insulating film is removed, the portion to be welded is electrically heated by, for example, a heating electrode rod to melt the insulating film. Therefore, after the insulating film is melted, the welding is performed. Spot welding was performed by the electrode rod.

[0004]

However, according to the welding method as described above, the spot welding spot is first heated by the heating electrode rod to melt the insulating film, and then the spot welding is performed by the welding electrode rod. Therefore, in addition to the original spot welding process, a melting process for melting the insulating film is required. Therefore, the number of processes is increased, and the welding apparatus and its control are complicated.

Therefore, an object of the present invention is to provide an ultrasonic welding method which can solve the above problems.

[0006]

In order to solve the above-mentioned problems, the ultrasonic welding method of the present invention is a welding method for spot-welding a conductive tape, which is obtained by laminating an insulating film on a conductive foil, to a conductor. , First overlaying a conductive tape on the conductor so that the insulating film contacts one surface of the conductor, then place the other surface of this conductor or the conductive foil surface of the conductive tape on the support surface, and then The conductive foil surface of the conductive tape or the other surface of the conductor is pressed by the pressing surface of the ultrasonic horn, and ultrasonic vibration is applied to the ultrasonic horn to cause the conductive tape and the conductive body to slide against each other for insulation. It is a welding method in which melting of a film and spot welding of a conductive foil to a conductor are performed at the same time.

[0007]

[Function] A conductive tape in which an insulating film is laminated on one surface of a conductive foil is placed so that the insulating film contacts the conductor.
While being placed on the surface of the conductor, pressure is applied between the support surface and the pressure surface, and the insulating tape and the insulator are slid on each other by ultrasonic vibration, and the friction heat causes the insulating film to melt and melt. This is a welding method in which the conductive foil is welded to the conductor at the same time.

Therefore, unlike the conventional case where the insulating film is melted by the electrode bar exclusively for melting, the work steps can be reduced and the apparatus and control can be simplified.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the ultrasonic welding method according to the present invention, a conductive tape C is obtained by laminating an insulating film (for example, a film such as polyethylene terephthalate or polyphenylene sulfide) B on one surface of the conductive foil A. This is intended for the case where spot welding is performed on the surface of the conductor D so that the conductor contacts the conductor D.

First, a welding apparatus used in the ultrasonic welding method of this embodiment will be described with reference to FIGS. 1 and 2. This welding apparatus pressurizes an anvil (supporting table) 1 in which a supporting surface 1a for supporting a conductor D is a mesh-shaped uneven portion and an upper surface of a conductive foil A of a conductive tape C, and reciprocates along the surface. The vibratory pressurizing device 2 includes a vibrator 4 arranged in the main body 3 of the device, and a vibrator 5 arranged to protrude from the vibrator 4 via a cone 5 and end portions thereof. An ultrasonic vibration is generated in the ultrasonic horn 6 provided with a pressure-applying surface 6a formed in a mesh-shaped uneven portion and the vibrator 4, and the pressurizing surface 6a is horizontally moved as indicated by an arrow a. The ultrasonic oscillator 7 is configured to cause reciprocating vibration (for example, vibration of about a dozen or more Kron).

The ultrasonic horn 6 is provided such that its pressing surface 6a is parallel to the supporting surface 1a of the anvil 1 and is movable up and down with respect to the supporting surface 1a. During welding, a pressure mechanism (not shown) applies pressure surface 6a as indicated by arrow b.
Can be moved closer to the support surface 1a. The mesh directions of the uneven portions formed on the support surface 1a and the pressure surface 6a are different from each other. For example, when one of them is formed vertically and horizontally like a grid,
The other is formed obliquely like a twill weave.

Next, the spot welding work will be described. First, as shown in FIG. 2, the lower surface of the conductor D is supported on the supporting surface 1a of the anvil 1 with the conductive tape C placed on the upper surface of the conductor D such that the insulating film B side is on the lower surface. Let

Next, the pressing surface 6a of the ultrasonic horn 6 is pressed against the upper surface of the conductive foil A to apply pressure, and ultrasonic vibration is generated in the vibrator 4 by the ultrasonic oscillator 7 to make the ultrasonic horn 6 conductive. The foil A is reciprocally oscillated along the surface, that is, in the horizontal direction. By this operation, the insulating film B is melted by frictional heat generated between the conductive tape C and the conductor D, that is, between the insulating film B and the conductor D, and at the same time, the conductive foil A and the conductor D are separated from each other. It is welded. That is, spot welding is instantaneously performed.

In the above embodiment, the conductor D side was supported on the support surface 1a of the anvil 1 during ultrasonic welding, but conversely, the conductive foil A side of the conductive tape C was supported on the anvil 1 side.
It may be supported on the supporting surface 1a.

[0015]

As described above, according to the welding method of the present invention, a conductive tape obtained by laminating an insulating film on one surface of a conductive foil is provided so that the insulating film contacts the conductor. In the state of being placed on the substrate, pressure is applied between the support surface and the pressure surface, and the conductive tape and the conductor are slid against each other by ultrasonic vibration, and the frictional heat causes the insulating film to melt and the conductive foil to move. Since the welding to the conductor is performed at the same time, unlike the conventional case where the insulating film is melted by the electrode rod exclusively for melting, the work process can be reduced and the device and the control can be simplified. be able to.

[Brief description of drawings]

FIG. 1 is a side view showing a schematic configuration of a welding apparatus used in an ultrasonic welding method according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of a welded portion in the embodiment.

[Explanation of symbols]

 A Conductive foil B Insulating film C Conductive tape D Conductor 1 Anvil 1a Supporting surface 2 Vibration pressurizing device 3 Device body 4 Transducer 5 Cone 6 Ultrasonic horn 6a Pressurizing surface 7 Ultrasonic oscillator

Claims (1)

[Claims] 1. A welding method for spot-welding a conductive tape comprising an insulating film laminated on a conductive foil to a conductor, wherein the conductive tape is made conductive so that the insulating film contacts one surface of the conductor. Place it on the body, then place the other surface of this conductor or the conductive foil surface of the conductive tape on the supporting surface, and then place the conductive foil surface of the conductive tape or the other surface of the conductive surface of the ultrasonic horn. It is characterized in that the conductive tape and the conductor are slid against each other by applying ultrasonic vibration to the ultrasonic horn and the insulating film is melted and the conductive foil is spot-welded to the conductor at the same time. Ultrasonic welding method.