JPS6324394Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a mounting plate that is integrally joined to the heat exchanger body by brazing with a cladding layer adhered to the surface thereof. The burring part formed on the edge of the mounting hole...
The same applies hereafter).

[Technical background of the invention and its problems]

For example, as shown in FIG. 1, there is an automobile heat exchanger in which mounting plates 5 are integrally joined to both ends of a heat exchanger body 1 by brazing. The mounting plate 5 is provided with mounting holes 2 for fixing the heat exchanger main body 1 to a support (not shown) as shown in FIG. 2. As shown in FIG. 3, a rubber grommet 6 is fitted into the mounting hole 2 as a vibration-proofing and cushioning member. However, in order to fit this grommet 6, the outer surface of the burring part 3 must fit into the grommet 6.
The shape must be such that it can match the However, when the mounting plate 5 is joined to the heat exchanger body 1 by brazing as shown in FIG. 1, the molten wax flows downward and forms a wax reservoir 7 on the lower surface of the burring part 3 as shown in FIG. . That is, generally, the surface of the mounting plate 5 is clad in advance with a low melting point brazing material as shown in FIG. 5, and a thin layer of cladding material 8 is formed on the surface. Such a mounting plate 5 is held in the state shown in FIG. 1 with a holder (not shown),
Place it together with the heat exchanger body in a vacuum furnace. The cladding layer 8 is then melted and the heat exchanger main body 1 and the mounting plate 5 are brazed together. Then, the cladding layer 8 melts and its surface tension forms a wax reservoir 7 on the lower surface of the burring portion 3, as shown in FIG. Such a wax reservoir 7 forms the burring part 3.
If this occurs, the grommet 6 cannot be fitted as shown in FIG. Therefore, conventionally, it has been necessary to scrape off the wax reservoir 7 with a file or the like.
Therefore, one extra step was required to fit the grommet 6.

The reason why the burring portion 3 is formed in the mounting hole 2 of the mounting plate 5 as described above is as follows.
The mounting plate 5 is supported by a support member 12 via bolts 9, etc., as shown in FIGS. 9 and 10, for example. That is, the bolt 9 (or stud) is inserted into the support member 12 protruding from the strength member of the automobile, and its shaft is inserted into the burred portion 3 of the mounting plate 5 via the grommet 6.
Then, the washer 10 is inserted into the tip of the bolt 9, and the nut 11 is fastened. Here, the burring portion 3 of the mounting plate 5 prevents the rubber grommet 6 from being damaged by the load of the heat exchanger. That is, by burring the edge of the mounting hole, the grommet 6
It is possible to distribute the load applied to the If the burring portion 3 is not formed and the mounting hole is flat, the load of the heat exchanger will be concentrated only on the thickness of the mounting plate, and there is a risk of damaging the grommet 6.

[Summary of the idea]

Therefore, an object of the present invention is to provide a burring structure having a notch 4 for preventing wax buildup, which eliminates the above-mentioned problems.

In this structure, the mounting plate 5 has a cladding layer on which a brazing material is applied in advance, and the mounting plate 5 and the heat exchanger main body 1 are integrally brazed together by the cladding layer. A mounting hole 2 is formed in the mounting plate 5. Then, the mounting hole 2 of the heat exchanger is fixed to the support body through a vibration-proofing and cushioning grommet. At the same time, the hole edge of the attachment hole 2 is formed to stand up, thereby forming the burring portion 3. In the present invention, in such a burring part structure,
It is characterized in that a cutout 4 for preventing wax buildup is formed at the lower end of the burring part 3 (the end on the gravity side during soldering).

Therefore, according to the present structure, since the notch 4 for preventing wax buildup is formed at the lower end of the mounting plate 5.
Even if it is integrally joined to the heat exchanger main body 1 by brazing, molten solder does not accumulate at the lower end of the burring part 3. That is, the molten wax fills the notch 4.
It flows smoothly downward through the . Therefore, it is possible to easily fit and align a rubber grommet or the like as a vibration damping member into the burring portion. Therefore, there is no need to remove the wax pool at the lower end of the burring as in the conventional method. Moreover, the heat exchanger can be manufactured easily and quickly.

[Example of idea]

Next, one embodiment of the present invention will be described based on the drawings. FIG. 7 is a plan view of the burring part of the present invention, and is a view taken along the line B-B when the grommet 6 is removed in FIG. 3, and FIG.
-C cross-sectional view. In this structure, as shown in FIGS. 7 and 8, a notch 4 is formed at the lower end of the burring portion 3 and at a portion raised from the base surface of the mounting plate 5. In this embodiment, the width d of the notch 4 is
is 4 mm, height H is 5 mm, plate thickness t is 1.6 mm,
The inner diameter D of the burring portion was 16 mm.

According to experiments, when the heat exchanger main body and the mounting plate 5 are brazed in a vacuum furnace in the shape and dimensions shown in FIGS. 7 and 8, molten brazing material accumulates at the lower end of the burring part 3. It flowed downward without any problem. This is because the presence of the notch 4 prevents the melted brazing material from adhering to the lower surface of the burring.

Note that the present invention is of course not limited to the above embodiments. For example, when the mounting plate is soldered to the heat exchanger main body and the main body is turned over 180 degrees and placed in the vacuum furnace, the cutout portion 4 is also formed at the 180° reversed position. Therefore, the above-mentioned meaning of "forming the notch 4 at the lower end of the burring" means that the notch 4 is located at the lower end of the burring during soldering.

[Effect of idea]

In the present invention, a mounting plate 5 having a cladding layer 8 on its surface is formed integrally with the heat exchanger main body 1 by soldering, and the main body is fixed to a support via vibration-proofing and buffering grommets. A hole 2 is drilled in the mounting plate 5. At the same time, the hole edge of the attachment hole 2 is formed to stand up, thereby forming the burring portion 3. In this burring part structure, the present invention is characterized in that a notch 4 for preventing wax buildup is formed at the lower end of the burring part 3.

The present invention has the above configuration and has the following effects.

(1) This burring structure has a notch 4 formed at its lower end to prevent wax buildup, so even if the mounting plate 5 is integrally joined to the heat exchanger body 1 by brazing, The pool is in the burring part 3
It does not occur at the lower end of . Therefore, a rubber grommet or the like can be easily fitted into the burring portion as a vibration damping member. Therefore, there is no need to remove the wax pool at the lower end of the burring as in the conventional method. Moreover, there is an effect that the heat exchanger can be manufactured easily and quickly.

(2) Also, since a part of the burring part 3 has the notch 4, a rubber grommet 6 as a vibration-proofing and buffering member can be easily and quickly fitted into the burring part. That is, when the rubber grommet 6 is pushed into the burring part while being deformed and fitted,
Since the grommet 6 is easily deformed by the notch 4, the fitting is facilitated.

[Brief explanation of drawings]

Figure 1 is an elevational view showing an example of an automotive heat exchanger to which the present invention is applied, Figure 2 is a right side view of the same, and Figure 3 is a right side view of the same.
The figure is a sectional view taken along the line A-A in Figure 2, and Figure 4 is a cross-sectional view taken along the line B-B in Figure 3 with the grommet 6 removed.
The arrow view and FIG. 5 are longitudinal cross-sectional views of the mounting plate 5, showing a state in which it has a cladding layer 8, and FIG. FIG. 7 is a plan view of the burring part structure of the present invention, and B is a longitudinal sectional view showing the state, with the grommet 6 of FIG. 3 removed.
-B arrow view, FIG. 8 is a cross-sectional view of FIG. 7 C-C arrow direction,
FIG. 9 is an elevational view showing an example of a support structure for a heat exchanger mounting plate to which the present invention is applied, and FIG. 10 is an enlarged vertical cross-sectional view of the section X in FIG. 9. DESCRIPTION OF SYMBOLS 1...Heat exchanger main body, 2...Mounting hole, 3...Burring part, 4...Notch part, 5...Mounting plate, 6...
... Grommet, 7... Wax reservoir, 8... Clad layer.

Claims (1)

[Scope of utility model registration request] A cladding layer made of brazing material adhered to the surface is heated and melted and integrally brazed to the heat exchanger main body 1, and the main body 1 is fixed to a support via a vibration damping grommet. At the same time as the mounting hole 2 is drilled, the hole edge of the hole 2 is formed to stand up.In the burring part structure of the heat exchanger mounting plate constituting the burring part 3, a burring part 3 is provided at the lower end of the burring part 3 to prevent wax buildup. A burring part structure of a heat exchanger mounting plate characterized by forming a cutout part 4.