JPS59166326A - Roll-shaped die mold for manufacturing heat exchange fins - Google Patents

Abstract

PURPOSE:To cut the slanted piece longer and increase the efficiency of heat exchange by providing a tip edge part and a tip escape part in a roll-shaped die for forming heat exchanger fin made by folding a thin plate to corrugated form and forming a slanted piece in unfolded part. CONSTITUTION:A roll-shaped die mold 14 is constituted of a tip part 11a, a tip edge 11b, a cutting edge 12a, an escape part for forming slanted piece 13a, a tip edge part 12b and a tip escape part 13b. An area (b) having no edge of the die 14 is made smaller compared with conventional die. Accordingly, when roll work is made by this die 14, the slanted piece 5 can be cut longer.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a rolled die mold for producing heat exchange fins used in coolers or heaters such as automobile radiators.

Structure of conventional example and its problems Conventionally, this kind of heat exchange fin is made by bending a thin plate of aluminum, brass, or other alloy, which is a metal with good heat conductivity, into a wave shape. A large number of notches are made in a direction approximately perpendicular to the edge formed by the bent portion, and the distance from one notch to the next notch is inclined, and by arranging many notches in parallel, a wavy shape is created. It has a structure in which a large number of inclined pieces are provided in areas other than the bent part of a thin plate bent at The heat is transmitted from the air to the heat exchange fins, and the heat exchange fins are cooled with air, thereby cooling the liquid flowing in the water pipes.

In order to manufacture this heat exchange fin, the part corresponding to the tooth surface is removed, and a tooth-shaped machined blade that is inclined like a gear or helical gear and has the effect of bending, cutting, and inclining the cutting part is used around the entire circumference. Prepare a pair of roll-shaped die molds in which a large number of thin gear-shaped disks having the same shape are arranged side by side and polymerized, so that the entire shape is gear-shaped and has a width as large as the width of the strip-shaped thin metal plate, for example. By rotating these so that they mesh and feeding the thin plate with good thermal conductivity into the meshing portion, the thin plate is bent into a wave shape as shown in FIG.

At the same time, as shown in Fig. 4, this thin plate forms an inclined piece in the part where it does not refract, so as shown in Fig. 1, it is bent in a wave shape and the inclined piece is formed in a place other than the bent part. It is possible to process a large number of heat exchange fins arranged in parallel at the same time.

In other words, as shown in FIG. 6, the conventional roll-shaped die for manufacturing heat exchange fins has a die tip 1 that performs wave-forming.
a, a blade portion 2 for cutting the inclined piece, and a molding relief portion 3 for the inclined piece. Furthermore, the tip of the die is the tip 1b.
and a range a in which there is no blade 2 for escaping interference during rotation of the opponent roll. FIG. 7 is a side view of a conventional die, and A indicates the area where there is no blade 2 at the tip 1b4.

Further, a large number of dies 4 are constructed and the forming and cutting process is performed continuously as shown in FIG. 2.

However, in the above configuration, as shown in FIG. 3, displacement 8 of the inclined piece 5 due to a special form of processing called rotational processing is unavoidable. That is, with respect to the wavy bending portion 7, in the case of the product feeding direction as shown in FIG.
A deviation 8 occurs with respect to the inclined piece 6 in front of it. The reason for this is, as shown in FIG. 9, the slippage between the tip 1 of the die 4 and the product (not shown) during rotational machining.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention has been proposed to have an inclined piece at the same position with respect to the refraction part, have a long inclined piece, and have a high inclined piece ratio.
In other words, it provides a fin with high heat exchange efficiency.

Structure of the Invention The present invention provides a wave-like formation of a member, a tip portion provided on a roll, a blade portion for partially cutting the member to form an inclined piece in the member, and the blade portion. It is composed of a tip blade part provided between the tip part and a molding relief part provided to escape interference during rotation of the mating roll, and the tip relief part is also formed in the tip part. and has an inclined piece at the same position with respect to the bent part of the heat exchange fin,
A fin with a long sloped piece and a high sloped piece ratio can be provided.

DESCRIPTION OF EMBODIMENTS Hereinafter, one implementation of the present invention will be described with reference to the drawings. In this embodiment, as shown in FIG.
2b, and a tip relief portion 13b. Furthermore, the die 14 is configured such that the area where the blade 12 is not present is smaller than the area a of the conventional die 4. FIG. 8 is a side view of the main die 14, and the length can be compared with range A and range B in FIG. When roll processing is performed with the die 14, the tip edge portion 12 is formed at a position corresponding to the deviation 8 of the inclined piece 5 shown in FIG.
b is configured so that the inclined piece can be cut even longer. That is, as shown in FIG. 9, the valley edge portion 9 of the mating roll is also lengthened accordingly.

At this time, the conventional roll 4 does not have a tip edge 12b, and even if it were attached, the valley edge portion 9 of the mating roll would interfere with the tip portion 1a and would not be able to rotate.

- The roll 14 of the strength wood embodiment can be rotated without interference due to the tip blade portion 12b and the tip relief portion 13b.

Further, even if there is a relief part in the tip blade part, the tip part can be secured and the machining of the bending part 7 will not be hindered at all.

Note that the tip blade portion 12b and the tip release portion 13b of the present invention may be configured not only on one side but also on both sides of the tip to ensure a longer inclined piece. It is not possible to secure the inclined piece at a symmetrical position with respect to the bending part 7.

Effects of the Invention As described above, according to the present invention, the inclined pieces can be symmetrical and long, and an excellent heat exchange fin with high efficiency can be manufactured.

[Brief explanation of drawings]

Figure 1 is a perspective view of the heat exchange fin, Figure 2 is an explanatory diagram of the processing principle for manufacturing the heat exchange fin, Figure 3 is a side view of the processed product, Figure 4 is a cross-sectional view of the roll die, and Figure 5. 6 is a partial perspective view showing a roll die according to an embodiment of the present invention, FIG. 7 is a partial side view of the conventional die, and FIG. 8 is a partial perspective view showing a roll die according to an embodiment of the present invention. FIG. 9 is a partial side view of the die in the example, and a partial front view of the roll die showing engagement. 11a...Tip of roll die, 11b...
...Tip ridge, 12a...Blade, 12b...
... Tip blade part, 13a ... Relief part of molding,
13b...Tip molding relief part. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure @3 Figure 5 Figure 6 Ward ■ Taste faction

Claims (1)

[Claims] A distal end portion provided on the roll that performs wave-like formation of the member and has a distal end portion, a blade portion that partially cuts the member so as to form an inclined piece in the member, and a portion between this blade portion and the said distal end portion. The roll for manufacturing heat exchange fins is composed of a tip blade section provided and a forming relief section provided to escape interference during rotation of the mating roll, and the forming relief section is also formed in the tip section. shaped dice.