JPH022492Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to a molding tool for corrugated louver fins used in heat exchangers. Regarding a cutting tool for forming louver fins.

Background Art Corrugated fins are often used as corrugated fins, such as heat exchange fins for automobile radiators, etc., which are provided with cut-and-raised louvers parallel to the flow of incoming air and folded into an S-shape. Various types of cutlery were proposed (publication of Utility Model Publication No. 16316, 1983, Publication of Utility Model Publication No. 59-19537)
(Japanese Patent Application Laid-open No. 110892/1983).

In addition, a forming device (Japanese Patent Publication No. 58-38253) etc. has been developed to increase the number of grooves per unit of length in corrugated fins without louvers, that is, to increase the number of folds per unit length. Various proposals have been made.

However, all rotary or vertical motion molding equipment and molding cutters are manufactured using a material with the same width as the required product fin width, resulting in poor manufacturing efficiency and low production efficiency per unit time. Improving the molding speed was also limited by the need to increase the number of louvers to improve the heat exchange rate, and there was a need for equipment that could produce a large number of corrugated fins of the desired product width in a single molding process.

Purpose of the invention The purpose of this invention is to create a cutting tool for forming corrugated louver fins that has excellent manufacturing efficiency and can simultaneously form multiple fins of a desired product width in the width direction from a wide forming material without forming waste.

Structure and effect of the invention This invention is a corrugate fin forming cutter consisting of an upper blade and a lower blade with a material width for folding a thin plate into a wave shape, in which the crests are alternately shifted in the corrugation direction at a required interval pattern in the fin width direction. Connect the tops of the front and back sides of the fins, and cut each blade of the upper and lower blades at the required intervals in order to cut and form louver parts in the front and back directions at the required intervals in the width direction of the fins on the folded thin plate part between the tops of the front and back sides. , divided in the fin width direction,
Consists of an arrangement alternately shifted in the corrugated direction,
In addition, the deviation of the divided blade in the corrugation direction is adjusted so that the thin plate connection length at the top of the louver section, which is cut and formed due to the deviation of the divided blade, is smaller than other connection points at the required product fin width interval. This is a cutting tool for molding corrugated louver fins, which is characterized by having a larger diameter than others.

Using the forming tool of this invention, after forming a wide material and cutting it to the required length in the length direction, the thin plate connection length at the top of the louver part is smaller than other connection points, and the width is It is possible to obtain a large number of fins with the desired product width by dividing in the direction, for example,
In the case of a press machine, from materials with a width of 300mm to 900mm,
Corrugated louver fins with a width of 300mm to 100mm,
10 to 30 pieces can be manufactured at the same time. Moreover, even if it is a rotary type molding machine, it can be similarly applied.

The molding cutter based on this invention consists of an arrangement in which the upper and lower blades are divided at required intervals in the fin width direction and alternately shifted in the corrugation direction. The shape is not limited to the embodiment, and various shapes may be adopted, and various patterns may be combined in the width direction or length direction. Further, the forming blade portion of the forming blade may be arranged as described above, and does not necessarily need to be divided, and may have an integral structure.

Disclosure Based on Drawings of the Invention Figure 1 is a cross-sectional top view of a corrugated louver fin showing a molding cutter according to this invention;
The figure is a schematic diagram showing a pattern of corrugated louver fins. FIG. 3 is a perspective view of a corrugated louver fin molded using the molding cutter of this invention. FIG. 4 is an explanatory top view of the molding cutter according to this invention, in which a plurality of sets of divided blades shown in FIG. 5 are arranged in order to mold the required product fin width. FIG. 5 is a top view of a set of split blades according to this invention.
Figures 6a, b, c, and d are a top view, a front view, and a side view of the split blade, respectively, and a shows the split blade B ₁ ,
B ₂ , b represents the divided blade A ₁ , c represents the divided blade A ₃ , and c represents the divided blade A ₂ .

Here, as shown in Figure 3, the top of the corrugate has a slightly meandering shape pattern in combination with "∧", "∨", and "-" when viewed from above.
This figure shows the case of molding a corrugated louver fin in which a louver is provided at the combination of ``∨'' and ``-''.

Figure 1 shows a line across the mountain side of a corrugated louver fin.
The blade shown by the chain double-dashed line between the thin plates 1 and 2 is the mountain-side blade M, and both upper and lower sides of the blade, that is, the upper side shown by the chain double-dashed line in the figure and the lower side not shown at all in the figure, are the valley side blades. It is V.

Moreover, FIG. 2 shows a product pattern when a large number of fins of the required product width are simultaneously molded using the molding cutter shown in FIG. 1, and "" indicates the position of the louver part 3,
The "↑" part indicates the middle division position.

The cutter that folds the thin plate into a wave shape by pressing in the vertical direction is the upper blade of the material width, the valley side cutter V and the lower blade,
It consists of the required number of combinations with the mountain side cutter M, and the mountain tops 4 and 5 are ``∧'', ``∨'' in the fin width direction as described above,
A required interval pattern consisting of a combination of "-",
The fins are alternately shifted in the corrugated direction and connected at the tops 4 and 5 on the front and back sides of the fins, and the louver parts 3 in the front and back direction are attached to the folded thin plates 1 and 2 between the tops 4 and 5 on the front and back at required intervals in the width direction of the fins. In order to cut and form the fins, each of the blades of the valley side blade V and the mountain side blade M is divided at required intervals in the fin width direction and alternately shifted in the corrugation direction, and the divided blades A
1, A2, A3, B1, B2 The length of the thin plate connection point 7 at the peak parts 4 and 5 of the louver part 3, which is cut and formed by misalignment, is at the required product fin width interval (between the arrows in the figure), and the other The deviation in the corrugation direction of the dividing blades B1 and B2, which cut and form the thin plate connecting point 7 of the intermediate part, is set to be smaller than the thin plate connecting point 6 than the other parts.

With the forming tool of this invention, after forming a wide material and cutting it to the required length in the length direction, the thin plate connection point at the top of the louver part is shorter in length than other connection points. Divide in the width direction,
A large number of fins with the required product width can be obtained.

By the way, it is possible to form six 48mm wide fins from an aluminum material with a thickness of 0.15 to 0.2mm and a width of 288mm without producing any waste, and it is also possible to form eight fins with a width of 35mm from the same material that is 280mm wide. , molding was possible without producing any debris. Further, the length of the thin plate connecting portion 7 of the intermediate portion was 0.1 to 0.2 mm, and the length of the other thin plate connecting portions 6 was 0.6 to 0.8 mm. The length of this connection point is appropriately selected depending on the material thickness, corrugation pattern, etc.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional top view of a corrugated louver fin showing a molding tool according to this invention;
The figure is a schematic diagram showing a pattern of a corrugated louver fin. FIG. 3 is a perspective view of a corrugated louver fin molded using the molding cutter of this invention. FIG. 4 is an explanatory top view of the molding cutter according to this invention, in which a plurality of sets of divided blades shown in FIG. 5 are arranged in order to mold the required product fin width. Fig. 5 is a top view of a set of split blades according to this invention, and Figs. 6 a, b, c, and d are top views of the split blades, respectively.
They are a front view and a side view, and a shows divided blades B ₁ , B ₂ ,
In the same figure, b shows a divided blade A ₁ , c shows a divided blade A ₃ , and c shows a divided blade A ₂ . 1, 2... Thin plate, 3... Louver part, 4, 5...
...Top of mountain, 6, 7... Thin plate connection point, A1, A
2, A3, B1, B2...Divided blade, M...crest side cutter, V...valley side cutter, 〓...louver part.

Claims (1)

[Scope of utility model registration request] A corrugate fin forming knife consisting of an upper blade and a lower blade with the width of the material for folding a thin plate into a wave shape,
The peaks are alternately shifted in the corrugated direction at the required spacing pattern in the width direction of the fin, and connected at the peaks on the front and back of the fin, and the folded thin plate part between the peaks on the front and back is connected at the required spacing in the width direction of the fin in the direction of the front and back. In order to cut and form the louver part, each blade of the upper and lower blades is divided in the fin width direction at a required interval, and the louver is arranged so as to be alternately shifted in the corrugation direction, and the louver is cut and formed by the deviation of the divided blades. A corrugated louver fin characterized in that the deviation of the dividing blade in the corrugating direction is made larger than other parts so that the thin plate connection length at the top of the part is smaller than other connection points at the required product fin width interval. Cutlery for molding.