JPH09271852A - Corrugated fin forming cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce wear by subjecting one of cutter and another cutter to a coating treatment or surface treatment with different components, thereby suppressing wear due to surface hardness increase and reducing affinity for rubbing each other of respective cutting edges. SOLUTION: A coating layer 14 of a prescribed component is applied to one corrugated fin forming cutter 3 (made of high speed steel or sintered hard alloy), on the other hand, a coating layer 15 having the component different from the coating layer 14 is applied to the other corrugated fin forming cutter 3 (made of high speed steel or sintered hard alloy). Thus, the wear amount of the cutters subjected to coating is reduced, further, the wear amount of the cutters subjected to the coating with different components is reduced as component to the cutters subjected to the coating treatment to the same component.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pair of corrugated fin forming cutters which are meshed with each other, at least one of which has a coating treatment or a surface treatment.

[0002]

2. Description of the Related Art Corrugated fins are used in heat exchangers such as car coolers and radiators. A conventional example of this corrugated fin manufacturing apparatus will be described with reference to FIG. 6. First, reference numeral 1 is a material roll, 2 is a material fed from the same material roll 1, 3 and 3 are a pair of corrugated fin forming cutters that mesh with each other, 4 is a pitch determining device and 5 is a cutting device.

Therefore, the material 2 fed from the material roll 1 is sent between a pair of corrugated fin forming cutters 3, 3 which mesh with each other, formed into a corrugated shape, and then sent to the pitch determining device 4, where R of corrugated fin
The part (see 13 in FIG. 10) is molded, and then sent to the cutter 5, where it is cut into a predetermined length to form a corrugated fin.

FIG. 7 shows the corrugated fin. In FIG. 7, reference numeral 6 is a corrugated plate-shaped portion, and 7 is a corrugated plate-shaped portion 6.
It is a group of louvers (blades) formed by cutting.

FIG. 8 shows the corrugated fin forming cutter 3 and FIG. 9 (a) shows a portion of the corrugated fin forming cutter 3 for forming the corrugated plate-like portion 6, 9B shows a part of the corrugated fin forming cutter 3 for forming the louver 7, and in FIG. 9B, 8 is a blade portion for shearing the louver 7, 9 is a tooth tip portion, Reference numeral 10 is a tooth bottom.

FIG. 2 is a sectional view of the blade portion 8 of the meshing portion of the corrugated fin molding cutter, in which the material 2 is cut by the meshed blade portion between the pair of corrugated fin molding cutters 3, 3. Indicates that

[0007]

The conventional pair of corrugated fin forming cutters 3 and 3 that mesh with each other are made of the same material such as high speed steel (high speed steel) and high speed steel or super hard and super hard. Had been molded.

Therefore, when the material 2 is cut, it is worn by the material 2 or the blade portions 8 are rubbed against each other and worn, which is a direct cause of shortening the life of the cutter, which is longer than the user. The need for longer life is increasing.

Therefore, an object of the present invention is to suppress the occurrence of wear and prolong the life of the cutter.

[0010]

In order to achieve the above object, a corrugated fin forming cutter according to the present invention is a pair of corrugated fin forming cutters that mesh with each other, wherein one cutter and the other cutter have different components. It is characterized by being subjected to coating treatment or surface treatment.

Further, in a pair of corrugated fin forming cutters that mesh with each other, only one of the cutters is subjected to coating treatment or surface treatment.

[Operation] According to the above-mentioned structure, when the pair of corrugated fin forming cutters are engaged with each other, the abrasion due to the material is suppressed by the surface hardness increase due to the coating or the surface treatment, and the mutual blades are prevented from each other. With respect to the rubbing of the parts, the wear is reduced due to the reduced affinity.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a corrugated fin forming cutter according to the present invention will be described in detail based on embodiments.

[Embodiment] FIG. 1 is a sectional view of a blade portion of the present corrugated fin forming cutter.

As shown in the figure, one corrugated fin forming cutter (high speed steel or cemented carbide) 3 is coated with a coating layer 14 of a predetermined component, and the other corrugated fin forming cutter (high speed steel or (Cemented Carbide) 3 is provided with a coating layer 15 having a different composition from the coating layer 14.

FIG. 3 shows the experimental results when TiN and alumina were used as the components of the coating layers 14 and 15. Further, FIG. 4 shows the experimental results when TiN and TiCN were used. Further, FIG. 5 shows the experimental results when TiN and TiAlN were used.

As can be seen from these experimental results, the amount of wear of the coated cutter is smaller than that of the uncoated cutter, and the amount of different components is different from that of the cutter coated with the same component. It can also be seen that the amount of wear of the coated cutter is small.

As a result, the lives of the corrugated fin forming cutters 3 are extended.

Although FIG. 5 also shows the cutter life when one cutter is TiN coated and the other cutter is untreated, the cutter life is also extended compared to the conventional cutter. I understand. Further, the corrugated fin forming cutter of the present invention is not limited to the above-mentioned coating treatment, and the same action and effect can be obtained even if other surface treatments are performed as in the above-mentioned embodiment.

[0020]

As described above, according to the present invention, since the coating treatment or the surface treatment is effectively performed, the fin material is prevented from being worn due to the increase in hardness, and the blade portions are rubbed against each other. As a result, wear is suppressed due to a decrease in affinity, so that the life of the corrugated fin forming cutter can be extended.

[Brief description of drawings]

FIG. 1 is a sectional view of a blade portion of a corrugated fin forming cutter according to an embodiment of the present invention.

FIG. 2 is a sectional view of a blade portion of a meshing portion of a corrugated fin forming cutter.

FIG. 3 is a diagram showing the relationship between the number of moldings and the amount of wear when TiN and alumina are coated.

FIG. 4 is a diagram showing the relationship between the number of moldings and the amount of wear when a coating process of TiN and TiCN is performed.

FIG. 5 is a diagram showing the relationship between the number of moldings and the amount of wear when TiN and TiAlN coating treatment is applied.

FIG. 6 is a side view showing a conventional corrugated fin manufacturing apparatus.

FIG. 7 is a perspective view showing a corrugated fin manufactured by the manufacturing apparatus.

FIG. 8 is a side view showing a conventional corrugated fin forming cutter.

FIG. 9 is a partially enlarged side view of the corrugated fin forming cutter.

FIG. 10 is a perspective view showing a fold line generated in a corrugated fin.

[Explanation of symbols]

 2 Materials 3 Corrugated fin forming cutter 8 Blades 14, 15 Coating layer

Claims (2)

[Claims] 1. A pair of corrugated fin forming cutters, which mesh with each other, wherein one cutter and the other cutter are coated or surface-treated with different components. 2. A pair of corrugated fin forming cutters, which mesh with each other, wherein only one of the cutters is subjected to coating treatment or surface treatment.