JPH037074Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an attachment structure between a plate and a pipe. More specifically, the present invention relates to a structure for attaching a plate and a tube, in which the tube is passed through a hole in the plate and brazed.

For example, in order to attach a pipe 2 such as a fuel supply pipe P or a pleather pipe to a plate material 1 constituting a fuel tank T of an automobile as shown in FIG. are fixed by spot welding W, etc., and the pipe 2 is inserted into the hole 3a formed in the backing plate 3 and brazed S.
Do 1. Then, it is common practice to pour solder S2 or the like into the space between the plate 1 and the contact plate 3 through a gap G formed between the plate 1 and the tube 2, and to braze and fix them. Therefore, the bonding process is complicated, making it unsuitable for mass production and resulting in high costs.

The present invention solves the above-mentioned problems in the mounting structure of a plate and a pipe, in which the pipe is passed through a hole in the plate and brazed, and also increases the joint strength by widening the brazed joint area as much as possible. The purpose is to

In order to achieve this purpose, the following configuration has been adopted. That is, as shown in FIGS. 2 and 3,
A plate material 1 having a tapered burring hole 1a formed therein for press-fitting the pipe 2, and the burring hole 1.
The portion 2a that fits into the burring hole 1a is formed to have a larger diameter than the other portions, and the large diameter portion 2a is fitted into the burring hole 1a.
between the tube 2 closely fitted to the inner surface of the tip 10a of the overhang flange 10, the entire inner circumferential surface of the flange excluding the tip 10a of the overhang flange 10, and the outer circumferential surface of the tube 2 facing the inner circumferential surface. The gist is a brazing filler metal S filled in the gap, and a mounting structure between a plate and a pipe.

Figure 2 shows the flange 10 of the burring hole 1a.
is a tapered portion 1 whose inclination angle α with respect to the hole axis is about 6 degrees from its tip 10a toward the plate main body surface 11.
0b, and the inclination angle β with respect to the plate main body surface 11 is approximately 15
tapered portion 10c and both surfaces 10b, 10c
This is an example in which the entire surface is formed into a substantially tapered shape consisting of an arcuate curved surface 10d connecting the two.

Further, FIG. 3 shows a modification in which a stepped portion 10e is formed between the flange tip portion 10a of the burring hole 1a and the tapered portions 10b to 10d.

Since the present invention has the above-mentioned configuration, the plate material is more effective than the conventional method in which a plate is welded to a plate material and a pipe is fixed by pouring solder or the like into the gap formed between the plate material and the plate material. The mounting structure between the pipe and the pipe can be extremely simplified.

In addition, the tip 10a of the overhanging flange 10 of the burring hole 1a formed in the plate material 1 and the fitting portion 2a of the pipe
The plate material 1 and the tube 2 are brazed together on a wide surface by the brazing material S filled between the entire inner circumferential surface of the flange except for the press-fitting part and the outer circumferential surface of the fitting part of the tube facing it. Ru. Moreover, by forming the fitting part 2a of the pipe 2 with respect to the burring hole 1a to have a large diameter, the length in the circumferential direction of the brazing surface can be increased, and the burring hole 1a can also be made to have a large diameter, so that the overhanging flange 10 can be It becomes possible to form the joint so that it protrudes largely in the axial direction, and the brazed joint area described above can be formed to be wider, and the joint strength can be significantly increased.

Furthermore, by making the joint portion 2a of the pipe 2 large in diameter, it is possible to easily insert the bent fuel supply pipe P into a fuel tank T as shown in FIG. 1, for example. Moreover, since the inner circumferential surface of the flange end 10a of the burring hole 1a is brought into close contact with the outer circumferential surface of the tube 2, it is possible to prevent the brazing filler metal from flowing out. This will prevent you from falling. Also tube 2
By press-fitting into the flange inner surface 10a of the burring hole 1a, the pipe 2 is attached to the plate material 1 during brazing.
Since it is positioned and fixed relative to the base plate, there are advantages such as easy brazing work.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing the mounting structure between the fuel tank and the fuel supply pipe, Fig. 2 is a sectional view of the mounting structure between the plate and the pipe showing an embodiment of the present invention, and Fig. 3 is a modified version. FIG. 4 is a diagram showing the conventional example. 1 is a plate material, 1a is a burring hole, 10 is a flange, 10a is a tip, 2 is a pipe, 2a is a fitting part, 2
b is the tube body, S is the brazing material, T is the fuel tank, P
is the fuel supply pipe.

Claims (1)

[Claims for Utility Model Registration] A plate material having a tapered burring hole formed therein for press-fitting a pipe, and a portion that fits into the burring hole formed with a larger diameter than other portions, and A tube whose diameter part is tightly fitted to the inner surface of the tip of the overhanging flange of the burring hole, and a gap between the entire inner peripheral surface of the flange excluding the tip of the overhanging flange and the outer peripheral surface of the tube facing the inner peripheral surface. A mounting structure between a plate and a pipe, consisting of a brazing filler metal filled in the gap.