Joining method for members and joint body

Patent metadata

Field	Value
Publication number	US-11084083-B2
Application number	US-201716472303-A
Country	US
Kind code	B2
Filing date	Dec 28, 2017
Priority date	Jan 12, 2017
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

In a joining method for members, a tube body having a center axis L, a wall surface body having a hole portion through which the tube body can be inserted, and an elastic body that can be inserted in the tube body are prepared. The tube body has an inner rib extending in a direction of the center axis so as to partition an inside thereof, and the inner rib has notches cut from a lower end of the inner rib in the direction of the center axis. Next, the tube body is inserted through the hole portion in the wall surface body, and the elastic body is inserted into internal spaces partitioned by the inner rib of the tube body. Furthermore, the elastic body is compressed in the direction of the center axis of the tube body and expanded outward in a radial direction with respect to the center axis, whereby an end of the tube body is expanded and deformed to be joined to the wall surface body by press-fitting.

First claim

The invention claimed is:

1. A joining method for members, the method comprising:
providing a tube body, a wall surface body having a hole portion through which the tube body can be inserted, and an elastic body which can be inserted into the tube body, the tube body having a center axis which vertically extends and an inner rib extending in a direction of the center axis so as to partition an inside of the tube body, the inner rib being provided with a notch formed by cutting a lower end of the inner rib in the direction of the center axis;
inserting the tube body into the hole portion in the wall surface body;
inserting the elastic body into an internal space partitioned by the inner rib of the tube body; and
compressing the elastic body in the direction of the center axis of the tube body and expanding the elastic body outward in a radial direction with respect to the center axis, thereby expanding an inserted part of the tube body into the wall surface body to join the inserted part to the wall surface body by press-fitting.

2. The joining method for members according to claim 1 , wherein the hole portion in the wall surface body is subjected to a burring process so that a wall surface of the hole portion is raised in the direction of the center axis.

3. The joining method for members according to claim 2 , wherein the hole portion raised by the burring process has a chamfered surface.

4. The joining method for members according to claim 3 , wherein
an upper edge of the wall surface of the hole portion raised by the burring process has a straight part and a corner connected to the straight part, and
the straight part is raised to be higher than the corner.

5. The joining method for members according to claim 3 , wherein the notch has a height equal to or greater than a height of an upper edge of the wall surface of the hole portion raised by the burring process.

6. The joining method for members according to claim 3 , wherein the notch is provided at a connection portion between the inner rib and an inner surface of the tube body.

7. The joining method for members according to claim 2 , wherein
an upper edge of the wall surface of the hole portion raised by the burring process has a straight part and a corner connected to the straight part, and
the straight part is raised to be higher than the corner.

8. The joining method for members according to claim 2 , wherein the notch has a height equal to or greater than a height of an upper edge of the wall surface of the hole portion raised by the burring process.

9. The joining method for members according to claim 2 , wherein the notch is provided at a connection portion between the inner rib and an inner surface of the tube body.

10. The joining method for members according to claim 1 , wherein the notch is provided at a connection portion between the inner rib and an inner surface of the tube body.

Assignees

• Kobe Steel Ltd

Inventors

• Maeda Yasuhiro
• Hashimura Toru
• Yukishige Ryohei

Classifications

• B21D39/06 Primary

  of tubes in openings, e.g. rolling-in · CPC title

• B21D17/025

  by pressing tubes axially · CPC title

• B60R19/023 Primary

  Details · CPC title

• B21D41/028

  expandable mandrels · CPC title

• B62D65/16

  the sub-units or components being exterior fittings, e.g. bumpers, lights, wipers {, exhausts} · CPC title