JP7649165B2 - Insulating composite part and method for manufacturing insulating composite part - Google Patents

Description

The present invention relates to an insulating composite part that electrically insulates and integrates multiple components, and a method for manufacturing the same.

The insulating structure shown in Patent Document 1 is known. This insulating structure has an insulating member interposed between a first member and a second member, and these members are fixed by an anodized aluminum positioning pin.

JP 2016-158438 A

However, the above insulating structure is made by combining and joining multiple components, which is not only costly but also poses the problem that the anodized coating on the surface peels off when the positioning pins are pressed into the first and second components, impairing the insulating performance.

The present invention was created in consideration of the above problems, and aims to provide an insulating composite part that insulates and integrates components, and a manufacturing method for the same.

The above problem can be solved by an insulating composite part that is composed of a first member that has a blind hole and is anodized, and a second member that is mechanically joined to the blind hole of the first member.

The problem can also be solved by a method for manufacturing an insulating composite part that insulates and integrates a first member and a second member, in which the first member has a pocket hole on its upper surface and is anodized, and the second member is placed on the upper surface of the first member. In this state, pressure is applied in a direction that compresses the second member, causing the second member to plastically deform and fill the pocket hole of the first member, thereby mechanically joining and integrating the first member and the second member.

It is preferable that the inner wall of the pocket hole of the first member is tapered in a direction that prevents the second member from slipping out.

The insulating composite part of the present invention can provide an integrated part in which the components are insulated from each other. Furthermore, the manufacturing method of the insulating composite part of the present invention can provide an integrated part in which the second component is joined without peeling off the anodized film of the first component.

FIG. 2 is a diagram showing the shape of members before they are joined by the present invention. 1A to 1C are diagrams showing states of a bonding process according to the present invention. FIG. 13 is a diagram showing a state where joining is completed according to the present invention.

Below, an embodiment of the manufacturing method for insulating composite parts according to the present invention will be described with reference to the drawings.

Figure 1 shows the shape of the members before joining, and Figure 1(b) shows a first member 10 made of an aluminum alloy material (classification A5056 in the JIS standard). Figure 1(a) shows a second member 20 made of an aluminum alloy material (classification A1070 in the JIS standard). The first member 10 and the second member 20 are formed and prepared separately in advance, for example, by cold heading.

The first member 10 is composed of a flat head 11 with a thickness of 1.3 mm and a shaft 12 that is molded integrally therewith. A bottomed pocket hole 13 is drilled in the top surface of the head 11. The inner peripheral wall of this pocket hole 13 is molded in a reverse tapered shape, and this reverse tapered portion 14 is inclined in a direction in which the inner diameter of the pocket hole 13 widens as it approaches the bottom surface. Furthermore, the opening edge 15 of the pocket hole 13 is chamfered in an arc shape.

The first member 10 is also coated with an anodized film over its entire surface, including the inner wall and bottom surface of the pocket hole portion 13. This makes the first member 10 electrically insulating.

The second member 20 has a flat body 22 with a thickness of 1.5 mm, and a protrusion 21 is integrally formed on the bottom surface.

In addition, the second member 20 is tin-plated. This makes the second member 20 easier to solder.

Figure 2 is a diagram showing a method for joining the first member 10 and the second member 20. The receiving mold 1 has a stepped insertion hole 1a, and is configured to hold the first member 10 by inserting the shaft portion 12 of the first member 10 into this insertion hole 1a and suspending the head portion 11 of the first member 10 from the stepped portion 1b.

The shaft portion 12 of the first member 10 is provided to facilitate positioning and holding in the receiving mold 1, but is not an essential component for achieving the effects of the present invention.

Then, the second member 20 is placed on the first member 10 by inserting the protrusion 21 of the second member 20 into the pocket hole 13 of the first member 10.

Next, as shown in FIG. 3, the punch pin 3 is advanced downward to compress the second member 20 from above, causing a part of the body 22 of the second member 20 and its protruding portion 21 to plastically deform and fill the pocket hole portion 13 of the first member 10. At this time, the thickness of the body 22 of the second member 20 is compressed to about 1.3 mm, while the thickness of the first member 10 does not change because the material of the first member 10 is harder than that of the second member 20. In this way, the first member 10 and the second member 20 are joined, and an insulating composite part is completed.

Once the joining is complete, the insulating composite part is ejected from the receiving mold 1 by advancing the knock-out pin 2, which is positioned below the insertion hole 1a of the receiving mold 1, upward.

The insulating composite part manufactured by the above joining method has high pull-out strength because the reverse taper portion 14 of the first member 10 catches against the pull-out direction. Also, the pocket hole portion 13 of the first member 10 is sufficiently filled with a part of the body 22 of the second member 20 and the protrusion 21, so high adhesion is obtained. Furthermore, because the opening edge portion 15 of the first member 10 is formed into an arc shape, the plastically deformed body 22 of the second member 20 can easily flow into the pocket hole portion 13 of the first member 10.

In addition, the insulating composite part is an integrated part that is electrically insulated from the second member 20 because the first member 10 is anodized. As a result, the number of parts and assembly steps can be reduced by replacing a structure that was previously assembled in the field of electrical components, for example, by placing an insulating member between metals, with the insulating composite part.

Furthermore, according to the manufacturing method for the insulating composite part, the second member 20 is joined to the pocket hole portion 13 of the first member 10, which is coated with an anodized film, by flowing the second member 20 through plastic deformation, so the first member 10 is not deformed. In addition, since the first member 10 is made of a material harder than the second member 20, damage such as cracks does not occur in the anodized film applied to the surface of the first member 10, and electrical insulation is not impaired.

In the above embodiment, the second member 20 has a protrusion 21, but this is to make it easier to fill the pocket hole 13 of the first member 10 with the second member 20. Depending on the material of the second member 20, it is not always necessary to provide the protrusion 21. The main body 22 of the second member 20 that has been plastically deformed by compression may flow and fill the pocket hole 13.

The present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the present invention. For example, the second member 20 may be a different metal instead of an aluminum alloy material, that is, the first member 10 and the second member 20 may be different metals.

REFERENCE SIGNS LIST 1 receiving die 1a insertion hole 1b stepped portion 2 knockout pin 3 punch pin 10 first member 11 head portion 12 shaft portion 13 blind hole portion 14 reverse tapered portion 15 opening edge portion 20 second member 21 convex portion

Claims (4)

An insulating composite part including a first member having a blind hole and having an anodized coating applied thereto, and a second member mechanically joined to the blind hole of the first member,
An insulating composite part , wherein the first member is not plastically deformed, and the second member is plastically deformed only to mechanically join the first member and the second member together . An insulating composite part according to claim 1, characterized in that the inner wall of the pocket hole of the first member is tapered in a direction that prevents the second member from slipping out. A method for manufacturing an insulating composite part in which a first member and a second member are insulated from each other and integrated together, comprising the steps of:
A method for manufacturing an insulating composite component, characterized in that a first member has a pocket hole on its upper surface and is anodized, a second member is placed on the upper surface of the first member, and pressure is applied in a direction compressing the second member in this state, causing only the second member to plastically deform and fill the pocket hole of the first member, thereby mechanically joining and integrating the first member and the second member. The method for manufacturing an insulating composite part according to claim 3, characterized in that the inner peripheral wall of the pocket hole of the first member is tapered in a direction that prevents the second member from slipping out.

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