JPS6289546A - Coupling structure for two members - Google Patents

Abstract

PURPOSE:To couple easily and exactly both members by forming a periphery coupling groove on the inside peripheral surface of the upper part than the bottom face of a peripheral grove of a plane member, fitting an overhang flange part of a thick-wall cylindrical body to its peripheral groove, and bringing the peripheral coupling groove to a plastical deformation by the pressure of the flange part. CONSTITUTION:A peripheral groove 2C if formed in a plane member 2, and plural periphery coupling grooves 2A are brought to turning by a cutting tool 3 on the peripheral surface whose depth is higher by (h) than the bottom face of its inside. An overhand flange part 1A of a thin-wall cylindrical body 1 which is softer than the plane member 2 is inserted and fitted into the peripheral groove 2C. Subsequently, a cylindrical metallic die 4 is made to descent along the outside periphery of the cylindrical body 1, and a male tooth 4A is made to abut on the overhang flange part 1A and pressed down. The flange part 1A is deformed plastic and fitted to the periphery coupling groove 2A. In such a case, when a step difference is provided in advance on the end part of the inner surface of the cylindrical body 1, an overhang excess thickness 1B adheres closely to the bottom face of the plane member and a seal property becomes better. Accordingly, both the members 1, 2 are coupled easily and exactly even in case the cylindrical body 1 is formed like a bottomed cup.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a structure for joining two members, and particularly to a joining portion for two members suitable for abutting and fixing a thin-walled joining member and a surface joining member.

[Background of the invention]

Conventionally, forming a container by using metal plastic deformation joining of a cylindrical joint member and a surface joint member was disclosed in, for example, Japanese Patent Publication No. 54-1.
It is known from Publication No. 51779. However, since the third coupling member is interposed between the surface coupling member and the cylindrical coupling member, there are many components, which has the drawback of poor productivity.

Furthermore, in FIGS. 5 and 6 of JP-A-60-37226, the structures of a cylindrical coupling member and a surface coupling member are similarly shown, but in FIG. Since the placed surface joining members are pressed and plastically deformed to join, the diameter of the surface joining members inevitably becomes large, which is a disadvantageous structure for manufacturing containers that require compactness. On the other hand, the 6th
In the figure, the surface joint member located on the inner periphery of the cylindrical joint member is pressed and plastically deformed to join, so the cylindrical body must be open at both ends, and in order to form a closed container. It is completely unsuitable.

[Purpose of the invention]

An object of the present invention is to provide a two-member coupling structure that easily and reliably couples a thin-walled cylindrical member perpendicularly to a flat member.

[Summary of the Invention] The present invention forms a bottom surface of a cross-sectional opening having a circumferential groove in order to vertically fit a thin-walled second coupling member to a first coupling member composed of a flat member. After the two coupling members are fitted and arranged, the coupling member of the cylinder 1 is plastically deformed to couple the two members with tension, and the coupling groove formed in the first coupling member can be easily formed.

[Embodiments of the invention]

The present invention will be explained below with reference to embodiments shown in the drawings.

In FIG. 1, a cylindrical second coupling member 1 made of a thin sheet metal has an integral annular flange IA extending in the outer circumferential direction at its tip, and is made of, for example, aluminum or iron with a plate thickness of several millimeters.

The flange may also have the same thickness as the above-mentioned plate thickness. A plurality of continuous coupling grooves 2A are arranged in an annular shape at a position facing the outer periphery IA of the flange portion of the second coupling member 1. This coupling groove is generally a W groove, and the width of the flange portion IA of the second coupling member 1 (
For example, it is very difficult to insert a cutting tool within a distance of 3 m or less since this is done using a lathe. Therefore, by forming the first coupling member in advance to have a concave cross section as shown in FIG. 2, the coupling groove can be formed in a wider space than the circumferential groove 2B. Therefore, the coupling groove 2A on the coupling surface can be easily and accurately machined by the machining clearance h of the cutting tool 3.

As shown in the left half of FIG.
The outer diameter is arranged to fit into the coupling surface of the first coupling member 2 and is restrained.

Next, the cylindrical mold 4 that descends according to the press machine descends while sliding on the outer periphery of the first coupling member 1, and as shown in the left half of FIG. Concentrately press the top surface of the collar IA. Then, the flange portion IA of the second coupling member made of a soft material locally plastically flows perpendicular to the space of the coupling groove 2A, and is coupled with tension to the protruding portion formed by the W groove. In other words, the small protrusion provided on the hard material that is the first coupling member bites into the soft material, and the second coupling member is attached to the hard material by the elastic stress locally plastically deformed by the protrusion. are combined with great tension. Thereafter, when the mold 4 is removed, the joining is completed and the joined state shown in FIG. 4 is achieved. The present invention is very effective even when the second coupling member 1 has a thin wall thickness (2 m or less), and the stepped heel portion 2C is maintained within the circumferential groove 2B with a high tension, thereby improving sealing performance. It becomes a high bond. Furthermore, the excess thickness IB has undergone plastic deformation.

The edge of the heel portion 2C of the first coupling member 2 is hermetically covered to further enhance the sealing performance.

According to the above embodiment, even a cylindrical body made of a thin plate can be easily and reliably plastically bonded, and a compact bonding structure that does not take up a particularly large area is provided. In addition, in the case of aluminum containers, welding was the mainstream, but considering the rounded part of the joining member, it was made considerably thicker, but according to this joint structure, the thickness is approximately 20~20mm.
It is possible to reduce the amount of aluminum material by 25%.

FIG. 5 shows an embodiment of the coupling of a cup-shaped cylindrical body with the open end of the second coupling member 1 closed, and as in the previous embodiment, the container is completely sealed and has high sealability and bonding strength.

Therefore, a compact and lightweight container is provided which is most suitable for enclosing gases, fluids, etc.

[Brief explanation of drawings]

The drawing shows an embodiment of the coupling groove of the two members of the present invention.
Figure 1 is a partial cross-sectional view showing how the flat plate and the cylindrical body are joined, Figure 2 is an enlarged view of the main part of Figure 1 including the processing process, and Figure 3 is the main part showing the joining method of Figure 1. FIG. 4 is an enlarged view of the main part of FIG. 1, and FIG. 5 is a partial cross-sectional view when used in a sealed container. 1... Second coupling member, 2... First coupling member, I
A...Brim portion, 2A...Joining groove, 3...Bite,
4...Mold. IB...extra thickness, 2G...circumferential groove.

Claims (1)

[Claims] 1. A second coupling member made of a cylindrical body is attached to the first coupling member constituting the lid.
The connecting members are butted together, at least one of the connecting members is plastically deformed into a connecting groove formed in the other connecting member, and the connecting members are connected by a tension force generated around the connecting groove, and the connecting force is maintained by a shearing force. In the two-member coupling structure, the first coupling member has a concave cross-section and includes a circumferential groove formed around the bottom and a circumferential coupling groove formed on the inner circumferential surface; a second coupling member that is fitted into the circumferential groove, whose outer periphery material is plastically deformed into the coupling groove, and which is coupled and fixed to the first coupling member by a tension force generated around the coupling groove. A two-member joint structure characterized by: 2. The two-member coupling structure according to claim 1, wherein the circumferential coupling groove is located above the bottom. 3. The two-member coupling structure according to claim 1, wherein the second coupling member is a cylindrical member with a bottom, and the open end is fixedly coupled to the first coupling member. 4. The two-member coupling structure according to claim 1, characterized in that a plurality of circumferential coupling grooves are formed. 5. The two-member coupling structure according to claim 1, wherein the inner diameter portion of the second coupling member covers a part of the bottom of the first coupling member.