JP3663518B2 - Corrugated fin cutting cutter - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a cutting cutter for accurately cutting a fin continuously fed from a corrugated fin molding machine to a desired length.
[0002]
[Prior art]
Conventionally, what has been proposed as a corrugated fin cutting cutter is that after positioning a feed worm that rotates with a tooth portion fitted to each wave of the corrugated fin that is continuously conveyed It was cut with a fixed blade and a movable blade immediately after the feeding worm.
Another proposal is to provide a pair of blades on the cutter body that is intermittently synchronized with the fin conveyance speed, and to drive the pair of blades in the conveyance direction and drive them up and down to cut the fins. Met.
[0003]
[Problems to be solved by the invention]
In order to further improve the productivity of corrugated fins used in large quantities in one heat exchanger, the fins are cut by driving in the vertical direction while moving the cutter in the conveying direction in synchronization with the conveying speed of the fins. Is desirable. In this case, since the cutter generally reciprocates at a relatively high speed in the fin conveyance direction, it is necessary to reduce the size and weight of the cutter body, and the feed worm type cutter is limited in its size and weight. there were.
Therefore, the present inventor tried various methods for positioning the fins with a simple structure and reciprocating at a high speed in the fin conveying direction, and driving them up and down to cut the fins as shown in FIG. Based on this knowledge, the present invention has learned the structure of a cutter that can always cut a fin at a constant position and at a high speed at a high speed, and has completed the present invention based on that knowledge.
[0004]
[Means for Solving the Problems]
The present invention comprises a pair of movable blades (2) and a fixed blade (3) that are spaced apart from each other in the vertical direction and are adjacent to each other in the conveying direction of the corrugated fin (1). In the corrugated fin cutting cutter in which both the blades (2) and (3) move in the conveying direction simultaneously when the movable blade (2) moves up and down.
It has a flat fin insertion part (4) that is flat as a whole and has a tapered cross section at its tip, and protrudes stepwise in the thickness direction at the base of the insertion part (4), and a cutting blade part (5) at its edge. A first blade formed with,
The cutting edge (7) formed at the tip edge is flat so that it can be inserted into the wave portion of the fin, and the edge protruding to the step of the first blade when the corrugated fin (1) is cut A second blade disposed at a position substantially aligned with the cutting blade portion (5) of
One of the first blade and the second blade is the movable blade (2), the other is the fixed blade (3),
The movable blade (2) located on the lower side moves upward and fits on the lower surface side of the ridge of the corrugated fin , and the movable blade (2) moves the corrugated fin upward and the fixed blade located on the upper side. (3) is configured to enter the upper surface side of the valley adjacent to the peak of the corrugated fin; and
A movable guide (10) provided with a guide surface (9) for guiding the corrugated fin (1) in the transport direction is moved along with the corrugated fin and the movable guide as the corrugated fin (1) moves upward. The movable guide 10 moves upward in synchronism with the movable blade 2 so that the guide (10) does not come into contact , and the movable guide 10 moves in the transport direction in synchronism with the movable blade 2. Composed of
The corrugated fin is cut by the cutting blade portion (5) at the edge protruding to the step of the first blade and the cutting blade portion (7) formed at the tip edge of the second blade, This is a corrugated fin cutting cutter .
[0005]
[Action]
The cutter of the present invention operates as shown in FIGS. That is, the movable blade 2 is raised, and the insertion portion 4 thereof is inserted into the lower surface side of the ridge portion of the corrugated fin 1 so that the corrugated fin 1 is initially positioned. When it further rises, the tip of the fixed blade 3 is fitted into the upper surface of the trough portion of the corrugated fin 1 and the next positioning is performed. Next, the movable blade 2 is further raised, and the bottom of the corrugated fin 1 is cut by the cutting blade portion 7 of the fixed blade 3 and the cutting blade portion 5 of the movable blade 2. At this time, the movable guide 10 rises as the movable blade 2 rises, preventing contact between the corrugated fins 1 and the movable guide 10, and preventing fin collapse due to the contact.
Further, in these steps, the movable blade 2, the fixed blade 3 and the pin 16 are cut while moving in the conveying direction of the corrugated fin 1 by the mechanism shown in FIG.
[0006]
【Example】
Next, embodiments of the present invention will be described with reference to the drawings.
1 to 3 sequentially show the operation of the cutter of the present invention, and FIG. 4 is a perspective view of the movable blade 2 and an example of a mechanism for raising the movable guide 10 in synchronization with the movable blade 2. Show. FIG. 5 is an enlarged vertical cross-sectional view showing a cutting process of the corrugated fin 1 by the fixed blade 3 and the fitting portion 4. Further, FIG. 6 is a schematic perspective view of the main body 12 to which the present cutter is attached, FIG. 7 is a longitudinal sectional view thereof, and FIG. 8 is an explanatory diagram for comparison experiments between the cutting cutter of the present invention and other cutters. .
This device is shown in its entirety in FIG. 6, and through holes are formed on both sides of a main body 12 made of a block body, and a pair of guide shafts 8 are inserted through the through holes. A bracket 11 protrudes from the tip of the main body 12, and one end of a link 14 is pivotally attached to the bracket 11. The other end (not shown) of the link 14 is pivotally attached to the edge of the rotating disk or the end of the rotating link, whereby the main body 12 is driven to reciprocate along the guide shaft 8.
[0007]
A space 18 is formed at the center of the main body 12 as shown in FIG. 7, and a piston rod of the cylinder 13 projects therefrom. Then, the tip of the piston rod is fitted to the lower end of the movable blade 2. The movable blade 2 is formed in a flat plate shape as shown in FIG. 4, and a piston rod connecting portion 17 is provided at the lower end thereof. And the insertion part 4 is formed in the mountain shape through the step part at the upper end. As shown in FIG. 5, the insertion portion 4 has a shape that is removably fitted to the lower surface side of the ridge portion of the corrugated fin 1, and its cross section has a mountain shape toward the tip, and the width itself is also higher. It is formed small. Then, the cutting blade portion 5 is formed at the edge of the stepped portion at the upper end of the movable blade 2. In this embodiment, in order to raise the movable guide 10 as the movable blade 2 rises, as an example, the movable blade 2 and the movable guide 10 are connected via a connecting member 15 as shown in FIG. That is, one end of the connecting member 15 is connected to one side of the movable blade 2, and the other end of the connecting member 15 is loosely inserted into the hole of the movable guide 10 via the pin 16.
[0008]
As shown in FIGS. 6 and 7, the movable blade 2 is held in the slit of the main body 12 so as to be movable up and down. The main body 12 has an L-shaped fixed guide 6, and the center of the upper end is notched in a rectangular shape, and a guide surface 6 a through which the fin is inserted is formed on the bottom surface. The fixed blade 3 is fixed to one side of the upper end of the fixed guide 6 so as to face the guide surface 6a, and the movable guide 10 is guided to move up and down. A guide surface 9 for guiding the upper surface of the corrugated fin 1 is formed on the lower surface of the movable guide 10.
The corrugated fin cutting cutter thus constructed reciprocates at a relatively high speed along the guide shaft 8 by the link 14, and moves in the corrugated fin 1 conveying direction in synchronization with the fin conveying speed when the fin is cut. The movable blade 2 rises through the cylinder 13 and cuts the corrugated fin 1 between the cutting blade portion 5 of the movable blade 2 and the cutting blade portion 7 of the fixed blade 3. As the movable blade 2 moves up, the movable guide 10 rises to prevent the corrugated fin 1 and the movable guide 10 from contacting each other when the corrugated fin 1 is cut, thereby preventing the collapse of the fin.
[0009]
In FIG. 4, the synchronization between the movable guide 10 and the movable blade 2 is achieved by the connecting member 15, but the movable guide 10 and the cylinder 13 may be connected.
Next, in this embodiment, one side of the fixed blade 3 is formed on a vertical plane parallel to the direction of gravity, and the other side is formed on a slope slightly inclined with respect to the direction of gravity. The lower edge of one side of the fixed blade 3 constitutes the cutting blade portion 7. The movable guide 10 has a surface along the inclination of the other side surface of the fixed blade 3, and the movable guide 10 moves up and down along the inclined surface. Therefore, when the movable guide 10 is raised in synchronization with the movable blade 2, the movable guide 10 needs to be connected to the movable blade 2 so as to be able to move slightly to the side. In this embodiment, the connecting member 15 and the movable guide 10 are connected via a pin 16 as shown in FIG. 4, and a slight relative movement to the side of the movable guide 10 is allowed. This can also be done by other known means. In the embodiment, the movable blade and the fixed blade may be exchanged up and down.
[0010]
[Experimental example]
Next, FIG. 8 shows a comparison experiment between the cutter of the present invention and another cutter. No1 to No3 are other cutters as comparative examples, and No4 is a cutter of the present invention. All the cutters are cut in the fins by moving the movable blade in the vertical direction while moving the entire cutter in the conveying direction of the corrugated fins.
In the No. 1 cutter, the movable blade moves up and down from below, and the fin is cut by the movable blade and the fixed blade provided above. In order to position the corrugated fin, a positioning jig is provided adjacent to the fixed blade, and the lower surface thereof is formed in a corrugated waveform substantially equal to the fin pitch. In this example, air is blown out from below the fin, and the movable blade is driven and cut in a state where the top of the fin is fitted in the waveform of the positioning jig. As a result of the cutting experiment, in this mechanism, the fin was often not reliably positioned on the jig. That is, the probability that the fin is guided to the jig is about 80%, and there was a 20% cut mistake. As a result, the No. 1 cutter mechanism cannot accurately determine the dimensional accuracy and the like.
[0011]
Next, the No. 2 cutter mechanism has a corrugated fin wave recess provided with a positioning jig to be attached and detached from above. The jig was placed a fixed distance away from the fixed blade to avoid interference with the movable blade. In this experiment, there was a defect that the edge of the corrugated fin that was cut was sandwiched between the jig and the fixed blade. And there were about 60% cut mistakes. Further, when the movable blade is lifted, the fin is lifted accordingly, and the upper portion of the fin is pressed against the lower surface of the fixed blade in the vicinity of the cutting portion, and the fin is crushed.
Therefore, the No. 3 mechanism employs a guide member that guides the upper surface of the fin so that the guide member can be moved up and down and the guide rises as the movable blade rises. At the same time, the fixed blade is flattened so that its tip can be fitted into the corrugated fin trough, thereby positioning the fin. When the corrugated fin is cut by such a cutter mechanism, the fin crushing as described above does not exist in the vicinity of the cut portion of the fin, but the cut portion of the fin appears in two patterns of a wave peak and a valley. It was. Therefore, it was not possible to obtain only the same fins that were cut.
[0012]
Thus, when a No. 4 cutter having the structure of the present invention was employed and experimented, the cut surface appeared only in the valley of the fin, and there was no cut at the top of the fin. As a result, only fins having the same shape and length were produced.
[0013]
【The invention's effect】
In the cutting cutter of the present invention, both the movable blade 2 and the fixed blade 3 are inserted into the wave portion of the fin, and the cutting position can be reliably positioned by both blades. At the same time, since the cutting position of the corrugated fin 1 is limited to one specific position, the cutting length and the cutting position are constant, and a highly reliable cutter can be provided.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a first step of cutting a cutting cutter according to the present invention.
FIG. 2 is an explanatory view showing the second step.
FIG. 3 is an explanatory view showing the third step.
FIG. 4 is a perspective view of the movable blade 2 used in the cutter of the present invention.
FIG. 5 is an explanatory view showing a cut state of the corrugated fin 1 by the cutter of the present invention.
FIG. 6 is a perspective view of a main part of the cutting cutter.
FIG. 7 is a longitudinal sectional view of the same.
FIG. 8 is a comparative explanatory view of the cutter of the present invention and another cutter.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Corrugated fin 2 Movable blade 3 Fixed blade 4 Insertion part 5 Cutting blade part 6 Fixed guide 6a Guide surface 7 Cutting blade part 8 Guide shaft 9 Guide surface
10 Movable guide
11 Bracket
12 Body
13 cylinders
14 links
15 Connecting member
16 pin
17 Piston rod connection
18 Space

Claims (1)

It has a pair of movable blades (2) and a fixed blade (3) that are spaced apart from each other in the vertical direction and are adjacent to each other in the conveying direction of the corrugated fin (1). In the corrugated fin cutting cutter in which both the blades (2), (3) are simultaneously moved in the conveying direction when the movable blade (2) moves up and down.
It has a flat fin insertion part (4) that is flat as a whole and has a tapered cross section at its tip, and protrudes stepwise in the thickness direction at the base of the insertion part (4), and a cutting blade part (5) at its edge. A first blade formed with,
The cutting edge (7) formed at the tip edge is flat so that it can be inserted into the wave portion of the fin, and the edge protruding to the step of the first blade when the corrugated fin (1) is cut A second blade disposed at a position substantially aligned with the cutting blade portion (5) of
One of the first blade and the second blade is the movable blade (2), the other is the fixed blade (3),
The movable blade (2) located on the lower side moves upward and fits on the lower surface side of the peak portion of the corrugated fin , and the movable blade (2) moves the corrugated fin upward and the fixed blade located on the upper side. (3) is configured to enter the upper surface side of the valley adjacent to the peak of the corrugated fin; and
A movable guide (10) provided with a guide surface (9) for guiding the corrugated fin (1) in the transport direction is moved along with the corrugated fin and the movable guide as the corrugated fin (1) moves upward. The movable guide 10 moves upward in synchronism with the movable blade 2 so that the guide (10) does not come into contact , and the movable guide 10 moves in the transport direction in synchronism with the movable blade 2. Composed of
The corrugated fin is cut by the cutting blade portion (5) at the edge protruding to the step of the first blade and the cutting blade portion (7) formed at the tip edge of the second blade, Corrugated fin cutting cutter.

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