JP3009689B2 - Cutting machine for corrugated plate - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting machine for a corrugated plate, and more particularly to a cutting machine for a corrugated plate that cuts a corrugated plate by the shearing force of an upper blade and a lower blade.

[Conventional technology]

Conventionally, for example, a corrugated fin is used for a heat exchanger mounted on a vehicle.

Such corrugated fins are continuously formed by a fin forming machine and cut to a predetermined length by a cutting machine.

Examples of such a corrugated plate cutting machine include, for example,
The one disclosed in JP-A-60-131322 is known.

FIG. 3 shows such a corrugated sheet cutting machine.
In the figure, reference numeral 11 denotes a flat front guide plate.

A corrugated fin 13 formed by a forming roll is arranged on the upper surface of the front guide plate 11, and the corrugated fin 13 slides on the upper surface of the front guide plate 11.

A lower blade 15 is fixed to the front guide plate 11 at the end of the corrugated fin 13 in the flow direction X. The upper edge of the lower blade 15 is formed flat, and the upper edge of the lower blade 15 is the upper surface of the front guide plate 11. The upper blade 15 is fixed so as to be substantially flush with the upper surface.

A rear guide plate 17 is disposed in the flow direction X of the corrugated fin 13 of the lower blade 15.
On the side, a concave portion 19 for cutting the corrugated fin 13 is formed.

Further, an upper blade 21 that can move up and down is arranged above the lower blade 15.

In the corrugated plate cutting machine configured as described above, the corrugated fins 13 formed by the forming rolls are guided by the guide plates 11 and 17.
When the corrugated fins 13 arranged on the guide plates 11 and 17 come to a predetermined position, for example, a signal from a rotary encoder arranged on a forming roll is used as shown in FIG. As described above, the upper blade 21 is lowered, and the corrugated fin 13 is cut by the shearing force between the upper blade 21 and the lower blade 15.

[Problems to be solved by the invention]

However, in such a corrugated plate cutting machine, the valley 23 of the corrugated fin 13 is usually cut, but there may be a case where a portion other than the valley 23 is cut due to a problem of positioning accuracy. And in this case, corrugated fins
13 is pressed down by the upper blade 21 and is bent with the valley 23 in contact with the lower blade 15 as a fulcrum. As shown in FIG. 5, the vicinity of the cut portion of the corrugated fin 13 after cutting is plastically deformed, There is a possibility that the protrusion may protrude below the normal valley portion 23 by about 0.1 mm to 1 mm.

For this reason, when the heat exchanger core is formed by the corrugated fins 13 and the tube, there is a problem that a gap is generated between the tube and the seizure failure.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a corrugated plate cutting machine capable of reliably preventing plastic deformation of a corrugated plate during cutting.

[Means for solving the problem]

The corrugated plate cutting machine according to the present invention has a guide plate on which a corrugated plate is placed on an upper surface, a lower blade whose upper end is fixed to substantially the same plane as the upper surface of the guide plate, and is disposed above the lower blade. An upper blade capable of moving up and down, in a corrugated plate cutting machine for cutting a corrugated plate by the shearing force of the lower blade and the upper blade, the upper end of the lower blade, the corrugated plate from the guide plate In the flow direction of the corrugated plate, it is arranged at a slightly longer interval than the pitch of the corrugated plate, and at the upper end of the lower blade, a narrow flat portion is left on the sliding surface side with the upper blade, and the guide plate side And an elastic deformation absorbing region of the corrugated plate at the time of cutting is formed between the guide member and the upper end of the lower blade.

(Operation)

In the cutting machine for a corrugated plate of the present invention, the upper end of the lower blade is disposed at a slightly longer interval than the pitch of the corrugated plate in the flow direction of the corrugated plate from the guide plate, and the upper blade is Provide an inclined surface that is inclined at an acute angle toward the guide plate side, leaving a narrow flat portion on the sliding surface side, and elastic deformation of the corrugated plate at the time of cutting between the guide member and the upper end of the lower blade Since the absorption area is formed, even if the corrugated plate is pushed down by the upper blade, the corrugated plate is separated from the upper blade to the guide plate on which the corrugated plate is supported, and is cut between the guide member and the upper end of the lower blade. Since the elastic deformation absorption region of the corrugated plate at the time is formed, the corrugated plate from the upper blade to the guide plate is elastically deformed to absorb the pushing force by the upper blade.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of a corrugated plate cutting machine according to the present invention. In the drawing, reference numeral 31 denotes a front guide plate. On the upper surface of the front guide plate 31, a corrugated fin 33 which is made of, for example, aluminum and is a corrugated plate having a plate pressure of 0.2 mm to 1.0 mm is placed.

In the flow direction X of the corrugated fins 33 of the front guide plate 31, a lower blade 35 is fixed, and the upper end of the lower blade 35 is fixed to be substantially flush with the upper surface of the front guide plate 31. . At the upper end of the lower blade 35, a flat portion 37 having a length of about 0.5 mm to 1.0 mm is formed.

In the flow direction X of the corrugated fin 33 rather than the lower blade 35,
A rear guide plate 39 is arranged, and a recess 41 for cutting is formed on the lower blade 35 side of the rear guide plate 39.

Further, an upper blade 43 that can move up and down is arranged above the lower blade 35.

The upper ends of the lower blades 35 are arranged at intervals Y slightly longer than the pitch P of the corrugated fins 33 in the flow direction X of the corrugated fins 33 from the front guide plate 31. The distance Y between the upper end of the lower blade 35 and the front guide plate 31 is determined as a range in which the corrugated fins 33 do not hang down from the upper surface of the front guide plate 31.

The upper part of the lower blade 35 is formed at an acute angle. That is,
The slope 45 on the front guide plate 31 side of the lower blade 35 and the rear guide plate of the lower blade 35
The angle α with the vertical surface 47 on the 39 side is 30 degrees to 60 degrees or less. This is because if α is larger than 60 degrees, the valley 47 of the corrugated fin 33 will be supported by the slope 45, and if α is smaller than 30 degrees, the lower blade 35 This is because the strength becomes weak.

In the corrugated board cutting machine configured as described above, even when the corrugated fin 33 is pushed down by the upper blade 43 at the time of cutting the corrugated fin 33 as shown in FIG.
Front guide plate where corrugated fins 33 are supported from 43
The corrugated fins 33 from the upper blade 43 to the front guide plate 31 are elastically deformed, so that the pushing force of the upper blade 43 is absorbed.

However, in the corrugated-plate cutting machine configured as described above, the upper end of the lower blade 35 is provided with the interval Y slightly longer than the pitch P of the corrugated fins 33 in the flow direction X of the corrugated fins 33 from the front guide plate 31. The upper edge of the lower blade 35 was formed at an acute angle, so that the corrugated fin 33 was
Even when pushed down by 43, the upper blade 43 is away from the front guide plate 31 where the corrugated fins 33 are supported, so that the corrugated fin 33 from the upper blade 43 to the front guide plate 31 is elastically deformed, and Absorb the pushing force of the blade 43,
Plastic deformation of the corrugated fin 33 during cutting can be reliably prevented.

In the corrugated board cutting machine configured as described above,
Move the upper end of the lower blade 35 from the front guide plate 31 to the corrugated fin 33
In the flow direction X of the corrugated fin 33, the elastic deformation absorption area B of the corrugated fin 33 is formed by disposing at a distance Y slightly longer than the pitch P of the corrugated fin 33, so that the corrugated fin 33 is supported from the upper blade 43. One valley 47 of the corrugated fin 33 is located between the front guide plate 31 and the valley 47 of the corrugated fin 33 even if the corrugated fin 33 is pushed down by the upper blade 43. Therefore, the corrugated fins 33 from the upper blade 43 to the front guide plate 31 are elastically deformed to absorb the pushing force of the upper blade 43, thereby reliably preventing the plastic deformation of the corrugated fins 33 during cutting. can do.

In the above embodiment, the lower blade 35 has a slope on the front guide plate 31 side.
Although an example in which 45 is formed has been described, the present invention is not limited to the above-described embodiment, and a slope may be formed on the rear guide plate side of the lower blade, and the upper portion of the lower blade may be formed at an acute angle. Thus, substantially the same effects as in the above embodiment can be obtained.

In the above-described embodiment, the case where the corrugated fin 33 is cut has been described. However, the present invention is not limited to the above-described embodiment, and may be applied to other corrugated plates.

〔The invention's effect〕

In the cutting machine for a corrugated plate of the present invention, the upper end of the lower blade is arranged at a slightly longer interval than the pitch of the corrugated plate in the flow direction of the corrugated plate from the guide plate, and the upper blade is provided with the upper blade at the upper end of the lower blade. Provide an inclined surface that is inclined at an acute angle toward the guide plate side, leaving a narrow flat part on the sliding surface side of the guide plate, and absorb the elastic deformation of the corrugated plate when cutting between the guide member and the upper end of the lower blade. Since the area is formed, even if the corrugated plate is pushed down by the upper blade, it is separated from the upper blade to the guide plate on which the corrugated plate is supported, and when cutting between the guide member and the upper end of the lower blade. Since the elastic deformation absorption area of the corrugated plate is formed, the corrugated plate from the upper blade to the guide plate is elastically deformed, absorbing the pushing force of the upper blade, and reliably preventing the plastic deformation of the corrugated plate during cutting can do.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a corrugated plate cutting machine according to the present invention. FIG. 2 is a side view showing a state where the corrugated fin is cut. FIG. 3 is a side view showing a conventional corrugated sheet cutting machine. FIG. 4 is a side view showing a state where a corrugated fin is cut by a conventional corrugated plate cutting machine. FIG. 5 is a side view showing the cut end of the corrugated fin plastically deformed. [Description of Signs of Main Parts] 31 Front guide plate 33 Corrugated fin 35 Lower blade 43 Upper blade.

Claims (1)

(57) [Claims] 1. A guide plate on which a corrugated plate is mounted on an upper surface, a lower blade having an upper end fixed substantially flush with the upper surface of the guide plate,
A corrugated plate cutting machine for cutting a corrugated plate by a shearing force between the lower blade and the upper blade, the upper blade being provided with a vertically movable upper blade disposed above the lower blade. To
The guide plate is disposed at an interval slightly longer than the pitch of the corrugated plate in the flow direction of the corrugated plate, and at the upper end of the lower blade, a flat portion having a narrow width on the sliding surface side with the upper blade. Leaving an inclined surface inclined at an acute angle toward the guide plate side to form an elastic deformation absorbing region of the corrugated plate at the time of cutting between the guide member and the upper end of the lower blade. Characteristic cutting machine for corrugated plates.