JP2008062314A - Method and device for cutting corrugated fin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and device for cutting a corrugated fin, which surely guides a movable blade to the valley part of the fin to prevent a cutting defect by providing the movable blade with a widening guide. <P>SOLUTION: In this method for cutting a corrugated fin, the corrugated fin is transferred at a predetermined speed, a movable blade is inserted from the top of the transferred fin toward the valley part, and the fin is cut to a predetermined length by the movable blade. In inserting the movable blade 3 in the valley part of the fin 1, the widening guide 10 formed on the blade surface of the movable blade 3 comes in while widening the sides of the valley part in the vicinity of the fin, thereby surely guiding the knife edge to the valley part and cutting the valley part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a corrugated fin cutting method and apparatus, and more particularly to a corrugated fin cutting method and apparatus that reliably guides the movable blade to a trough portion of the fin by providing a widening guide to the movable blade. About.

Fins (corrugated fins) mounted on a vehicle radiator form a large number of bent parts by feeding the fin material between a pair of gear-shaped forming rollers from a material roll wound with a thin plate-like fin material. And processed into a wave shape. And this fin is cut | disconnected by the length according to the shape of a mounting part. As this fin cutting device, for example, like the technique of patent documents 1 and 2, it is each on both shoulder parts of a wavy fin. A technique is known in which a pair of worms that engage and count the number of ridges of the fins to convey the fins in the conveying direction and cut with a movable blade while feeding out the wavy fins (Patent Document 1). 2).
JP 2002-109506 A Japanese Patent Laid-Open No. 2004-223585

The fins described above are formed by bending a thin fin material into a straight shape, but this bent shape is not limited to a straight shape, and the fin has a shape in which the valley line of the fin is bent into a mountain shape. Has been developed. The fins with the valley line bent into a chevron shape are used to promote heat exchange efficiency. However, when this fin is cut to a predetermined length according to the core size of the radiator, the fin valley line is used. Has a problem that it is difficult to insert the movable blade.
Further, even when the bent shape is a straight shape, it may be formed in a slightly mountain shape during production, and at this time, the same problem as described above occurs.
Furthermore, since the fin material is made of an elastic material, it is difficult to completely prevent cutting deviation due to elasticity.

  The present invention has been made in order to solve the above-described problems, and the object of the present invention is to provide a widening guide on the movable blade, thereby reliably guiding the movable blade to the valley of the fin to prevent cutting failure. An object of the present invention is to provide a corrugated fin cutting method and apparatus for preventing the above.

In the method according to claim 1 of the present invention, the fin processed into a wave shape is transferred continuously or intermittently, the movable blade is inserted toward the bottom of the valley of the transferred fin, and the movable blade In the corrugated fin cutting method of shearing the fin to a predetermined length,
When inserting the movable blade into the fin trough, the widening guide formed on the blade surface of the movable blade enters while expanding the fin width direction center part or both ends of the trough side surface between the front and rear of the fin, Thereby, the cutting edge was surely guided to the bottom of the valley and the valley was cut.

  The apparatus according to claim 2, wherein the fin is bent into a wave shape with the valley of the fin bent in a mountain shape, the transfer device that transfers the fin continuously or intermittently, and the transfer device. In a corrugated fin cutting device comprising a movable blade for cutting a fin, a fixed blade disposed below the movable blade, and a drive means for moving the movable blade up and down, the blade surface of the movable blade is moved from the blade tip to the blade surface of the movable blade. When forming a widening guide that is gradually thickened toward the base, placing the widening guide in the entry passage portion along the contact portion of the fin, and inserting the movable blade into the trough bent into the chevron The fins are widened while the fins and the widening guide are in contact with each other.

  In the method according to claim 1 of the present invention, the fin processed into a wave shape is transferred at a predetermined speed, the movable blade is inserted toward the bottom of the valley of the transferred fin, and the movable blade In the corrugated fin cutting method in which the fin is sheared to a predetermined length, when the movable blade is inserted into the valley of the fin, the widening guide formed on the blade surface of the movable blade pushes the valley between the front and back of the fin. However, since the cutting edge enters, the cutting edge is surely guided to the bottom of the valley without making contact with the side surface of the valley portion, and cutting failure is prevented.

  The apparatus according to claim 2, wherein the fin is bent in a wave shape with the valley of the fin bent in a mountain shape, a transfer device for transferring the fin continuously or intermittently, and a transfer A corrugated fin cutting device comprising: a movable blade for cutting a fin transferred by the device; a fixed blade disposed below the movable blade; and a driving means for moving the movable blade up and down. In the surface, a widening guide that is gradually thickened from the blade edge toward the base is formed, and the widening guide is disposed in the entry passage portion along the protrusion contact portion of the fin. When the movable blade is inserted into a portion excluding the louver, the fins are widened while the fins and the widening guide are in contact with each other. For this reason, the cutting edge is surely guided to the bottom of the valley without contacting the side surface of the valley and the cutting failure is prevented.

Embodiments of the present invention will be described below with reference to the drawings.
1 is a plan view of a fin cutting device, FIG. 2 is a side view of the fin cutting device, FIG. 3 is a front view of the fin cutting device, FIG. 4 is an explanatory view of a movable blade according to the first embodiment, and FIG. FIG. 6A is a plan view of a fin according to a fin cutting method according to the first embodiment, FIG. 6B is a perspective view, FIG. 6 is an explanatory view of the fin cutting method according to the first embodiment, and FIG. (A) Top view of the fin which concerns on the cutting method of the fin which concerns on an example, (b) Perspective view, FIG. 8 is explanatory drawing of the movable blade which concerns on 2nd Example, FIG. 9 is the movable blade which concerns on 3rd Example It is explanatory drawing.

  The fin cutting device according to the first embodiment of the present invention includes, as shown in FIGS. 1 to 6, a fin 1 bent into a wave shape with a valley portion of the fin bent in a mountain shape, and the fin 1. A transfer device 2 that transfers at a predetermined speed, a movable blade 3 that cuts the fins transferred by the transfer device 2, a guide piece 4 that guides the entry position of the movable blade 3, and a lower portion of the movable blade. A fixed blade 5 and a drive device (not shown) for driving the movable blade 3 in a horizontal direction and a vertical direction are provided.

The fin 1 is formed by feeding a fin material between a pair of gear-shaped forming rollers (not shown) from a material roll (not shown) around which a thin plate-like fin material is wound, as shown in FIG. As shown in (b), a large number of bent portions are formed and processed into a wave shape. The bent portions are each bent into a mountain shape and overlapped with each other at a predetermined pitch.
A plurality of louvers 6 for promoting heat exchanging efficiency are formed in each valley portion so as to be spaced apart in the fin width direction, leaving the center and both ends in the width direction. When the fin material is formed into a wave shape, the louver 6 is provided with a linear notch in the height direction of the fin, and at the same time, is cut up in the longitudinal direction.
The planar view shape of the fin 1 is a symmetrical mountain shape with the center protruding.

  As shown in FIGS. 1 to 3, the transfer device continuously conveys the corrugated fin 1 in the conveyance direction (arrow direction in FIG. 1) on the conveyance table and regulates the position of the valley portion of the fin 1. The worm 2a is composed of a right-handed worm 2a and a left-handed worm 2b. The worms 2a and 2b are respectively engaged with the shoulders of the fin 1 having a fin pitch to be manufactured. The position of the valley of 1 is regulated.

  The worms 2a and 2b are connected by a gear (not shown) and are each rotated in the direction of arrow S by a servo motor. The number of fin valleys conveyed from this rotational speed is counted. However, the fin 1 can be continuously transferred.

  The guide piece 4 is for guiding the movable blade 3 to the cutting position of the fin 1, and as shown in FIG. 3, the lower side is curved so as to avoid both worms 2a and 2b, and the tip thereof is a fin. It is formed to have a thickness and width that can enter one trough.

The movable blade 3 and the guide piece 4 are driven by a trolley (not shown) which is mounted on a carriage by a cam (not shown) linked to the carriage so as to be movable in the direction of fin material conveyance. , 2b is controlled so as to be movable in synchronization with the fin material.
Therefore, the movable blade 3 moves up and down simultaneously while moving horizontally in the transfer direction of the fin 1, and cuts the fin 1 by shearing with the fixed blade 5.

The movable blade 3 is for cutting the fin 1 along the guide piece 4, and as shown in FIG. 4, the base 8 fixed to the driving device described above and the base 8 are gradually converged. The blade surface 9 is formed with a widening guide 10.
Further, both sides of the blade surface 9 have the same thickness as the base portion 8, and the blade tip has a V-shaped center projecting. The blade edge gradually converges toward the tip, and the tip (lower end) is a sharp blade.
The widening guide 10 has a blade surface center portion slightly thicker than the inclination of the blade, and the widening guide 10 is formed at an entrance passage portion along the contact portion (mountain protrusion) of the fin 1. The upper and lower belts are formed in the central portion of the blade surface 9.
When the movable blade 3 enters the valley of the fin 1, the widening guide 10 comes into contact with the mountain-shaped protrusion and pushes the valley of the fin 1.

Next, the operation of the first embodiment will be described.
In the first embodiment, the fin-shaped protrusions of the fins 1 are transferred to the right in the figure with the direction opposite to the traveling direction. That is, the fin 1 transferred in the state of “<<<” is cut.
As shown in FIG. 6, the movable blade descends to the trough while moving horizontally with the transfer of the fins 1.
When the blade tip enters the valley portion of the fin 1, the widening guide 10 of the movable blade 3 hits the chevron protrusion contact portion 1 a on the downstream side in the traveling direction of the fin 1. Since the widening guide 10 is formed thicker than the blade surface 9, the blade tip is inserted while widening the valley portion of the fin 1. Then, the cutting edge is prevented from coming into contact with the side surface of the valley portion or cutting of the side surface of the valley portion, and is reliably guided to the bottom of the valley portion.
As a result, contact between the movable blade 3 and the fin valley side surface or cutting of the valley side surface (for example, louver) by the movable blade 3 is prevented, and the blade tip reaches the valley bottom and shears with the fixed blade 5 to remove the fin 1. Disconnect.
After the fin 1 is cut, the movable blade 3 and the guide piece 4 return to their original positions, pass through the same track, and continuously cut the fin.

In the first embodiment, when the movable blade 3 is inserted into the valley portion of the fin 1, the blade edge enters while expanding the valley portion on the downstream side in the traveling direction of the fin 1, so that the blade edge is brought into contact with the side surface of the valley portion. Without cutting the blade edge or cutting the side surface of the valley, the blade edge is reliably guided to the valley bottom.
In this embodiment, the pitch between the valley and the adjacent valley is 2.2 mm, the blade thickness is 3 mm at the maximum, and the difference between the thickness of the widening guide portion and the blade is 0.5 mm.

Next, Example 2 will be described.
7 and 8 show a fin cutting device according to the second embodiment.
The fin cutting device of the second embodiment is one in which widening guides are formed at the left and right ends of the blade edge, whereas the fin cutting device of the first embodiment is provided with a widening guide at the center portion of the blade edge.
As shown in FIG. 8, the movable blade 3 of the present embodiment includes a base portion 8 fixed to the driving device and a blade surface 9 that converges gradually from the base portion and sharpens, and the blade surface 9 has a widening guide 10. Is formed.
Further, both sides of the blade surface 9 have the same thickness as the base 8, and the center of the blade tip is recessed in an inverted V shape. The blade edge gradually converges toward the tip, and the tip (lower end) is a sharp blade.
The widening guide 10 is configured such that both end portions of the blade surface are slightly thicker than the inclination of the blade, and this widening guide is formed at an entrance passage portion along the protrusion contact portion (hem portion) of the fin 1. It is formed in the shape of the upper and lower belts at both end portions of the blade surface 9.
When the movable blade 3 enters the valley of the fin 1, the widening guide 10 comes into contact with the protrusion of the skirt and pushes the valley of the fin 1.

Next, the operation of the second embodiment will be described.
In the second embodiment, the fin-shaped protrusions of the fins 1 are moved to the right in the figure in a state where they are directed in the traveling direction. That is, the fin 1 transferred in the state of [>>>] is cut.
The movable blade 3 descends to the trough while moving horizontally with the transfer of the fin 1, but when the blade tip enters the trough of the fin 1, the widening guide 10 of the movable blade 3 is downstream in the direction of travel of the fin. It hits the protrusion contact part 1b (hem part) on the side. Since this widening guide 10 is formed thicker than the blade surface, the blade edge is inserted while widening the valley portion of the fin 1. Then, the cutting edge is prevented from coming into contact with the side surface of the valley portion or cutting of the side surface of the valley portion, and is reliably guided to the bottom of the valley.
As a result, contact between the movable blade 3 and the fin valley side surface or cutting of the valley side surface (for example, louver) by the movable blade 3 is prevented, and the blade tip reaches the valley bottom and shears with the fixed blade 5 to remove the fin 1. Disconnect.
After the fin 1 is cut, the movable blade 3 and the guide piece 4 return to their original positions, pass through the same track, and continuously cut the fin.

  In the second embodiment, when the movable blade 3 is inserted into the valley portion of the fin 1, the blade edge enters while expanding the valley portion on the downstream side in the traveling direction, so that the blade edge does not contact the side surface of the valley portion. Alternatively, the cutting edge is surely guided to the bottom of the valley without cutting the side surface of the valley.

Next, Example 3 will be described.
FIG. 9 is an explanatory view of the movable blade according to the third embodiment.
In the fin cutting device of the third embodiment, the fins 1 of the first and second embodiments are provided with widening guides 10 at either the central portion or both ends of the cutting edge, whereas the widening guides are provided at the center and both left and right ends of the cutting edge. 10 is formed.
As shown in FIG. 9, the movable blade 3 of the present embodiment includes a base portion 8 fixed to the driving device and a blade surface 9 which converges gradually from the base portion and sharpens, and the blade surface 9 has a widening guide 10. Is formed.
Moreover, both sides of the blade surface 9 are made the same thickness as the base, and the center of the blade tip is recessed in an inverted V shape. The blade edge gradually converges toward the tip, and the tip (lower end) is a sharp blade.
The widening guide 10 has a blade face center portion and both end portions that are slightly thicker than the inclination of the blade, and this widening guide 10 is provided at the fin protrusion contact portions (mountain protrusions and skirts). It is formed in the approach passage part along. That is, it is formed in an upper and lower belt shape at both ends on the upstream side of the blade surface 9 and at the downstream central portion of the blade surface.
When the movable blade 3 enters the valley of the fin 1, the widening guide 10 comes into contact with the protrusions of the chevron and the skirt and pushes the valley of the fin 1.

Next, the operation of the third embodiment will be described.
In the third embodiment, the fin-shaped convex portion of the fin is moved rightward in the figure in a state where it is directed in the traveling direction. That is, the fin 1 transferred in the state of [>>>] is cut.
The movable blade 3 descends to the trough while moving horizontally with the transfer of the fin 1. However, when the blade tip enters the trough of the fin 1, the widening guides 10 at both ends of the movable blade 3 are located at the front hem. It hits the part contact part 1b. And the center widening guide 10 hits the back mountain-shaped protrusion contact part 1a. Since these widening guides 10 are formed thicker than the blade surface, the blade tip is inserted while the valley of the fin 1 is widened. Then, the cutting edge is prevented from coming into contact with the side surface of the valley portion or cutting of the side surface of the valley portion, and is surely guided to the bottom of the valley.
As a result, contact between the movable blade 3 and the fin valley side surface or cutting of the valley side surface (for example, louver) by the movable blade 3 is prevented, and the blade tip reaches the valley bottom and shears with the fixed blade 5 to remove the fin 1. Disconnect.
After the fin 1 is cut, the movable blade 3 and the guide piece 4 return to their original positions, pass through the same track, and continuously cut the fin 1.

  In the third embodiment, when the movable blade 3 is inserted into the valley portion of the fin 1, the blade edge enters while expanding the valley portion between the front and rear fins on the upstream side and the downstream side in the traveling direction. The blade edge is reliably guided to the valley bottom without contacting the side surface.

Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included in the present invention.
For example, in the above-described embodiment, the so-called travel cutting in which the movable blade 3 and the guide piece 4 are traveled together with the fin 1 has been described. However, the worms 2a and 2b are used to transport the fin material by a predetermined number of peaks and stop the It is also possible to apply to stop cutting in which the movable blade 3 provided at the tips of the worms 2a and 2b is instantaneously lowered to cut the fin material.
Moreover, in the said Example 1, 2, although it was set as the structure which widens the fin valley part of the downstream of the advancing direction of a fin, the opposite side to this structure, ie, the attachment site | part of the widening guide, is set to the upstream of a movable blade. And it is also possible to transfer the fin of the shape corresponding to this widening guide and to widen the fin trough on the upstream side of the movable blade.
Furthermore, in the first embodiment, when the fins transferred in the state of “<<<” are cut, the widening guide 10 of the movable blade 3 hits the chevron protrusion abutting portion 1a on the downstream side in the traveling direction of the fins 1 and I expanded the valley. However, the thickness of the widening guide 10 of the movable blade 3 is adjusted at the time of cutting the fin that is transferred in a state where the angle protrusion of the fin 1 is [>>>], and the angle recess (fin) It is also possible to widen the valleys of the fins with the width direction center portion as a contact portion.
Similarly, in Example 2, the thickness of the widening guides 10 provided at both ends of the movable blade 3 is adjusted at the time of cutting the fins transferred in the state of “<<<”, and the fin 1 travels downstream in the traveling direction. It is also possible to widen the valleys of the fins by using the mountain-shaped hems (both ends in the fin width direction) as contact portions. The same applies to Example 3.

It is a top view of the cutting device of a fin. It is a side view of the cutting device of a fin. It is a front view of the cutting device of a fin. It is explanatory drawing of the movable blade which concerns on 1st Example. It is the (a) top view of the fin which concerns on the cutting method of the fin which concerns on 1st Example, (b) It is a perspective view. It is explanatory drawing of the cutting method of the fin which concerns on 1st Example. It is the (a) top view of the fin which concerns on the cutting method of the fin which concerns on 2nd Example, (b) It is a perspective view. It is explanatory drawing of the movable blade which concerns on 2nd Example. It is explanatory drawing of the movable blade which concerns on 3rd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fin 2 Transfer apparatus 3 Movable blade 4 Guide piece 5 Fixed blade 6 Louver 8 Base 9 Blade surface 10 Widening guide

Claims (4)

Corrugated fin cutting, in which a fin processed into a wave shape is transferred continuously or intermittently, a movable blade is inserted toward the bottom of the valley of the transferred fin, and the fin is sheared to a predetermined length by the movable blade. In the method
When inserting the movable blade into the fin trough, the widening guide formed on the blade surface of the movable blade enters while expanding the fin width direction center part or both ends of the trough side surface between the front and rear of the fin, A corrugated fin cutting method that reliably guides the cutting edge to the bottom of the valley and cuts the valley. A fin that is bent into a wave shape with the valley of the fin bent into a mountain shape, a transfer device that transfers the fin continuously or intermittently, a movable blade that cuts the fin transferred by the transfer device, and In a corrugated fin cutting device comprising a fixed blade disposed below the movable blade and a driving means for moving the movable blade up and down,
On the blade surface of the movable blade, a widening guide that is gradually thickened from the blade edge toward the base portion is formed,
The widening guide is disposed in the entry passage portion along the contact portion of the fin,
A corrugated fin cutting device configured to increase a gap between fins while contacting the fin and the widening guide when inserting the movable blade into the trough bent into the mountain shape.   3. The corrugated fin cutting device according to claim 2, wherein the formation position of the widening guide is formed at either the center of the movable blade or both ends of the movable blade in correspondence with the transfer direction of the fin.   4. The corrugated fin cutting device according to claim 2, wherein the widening guide is formed on both sides of the movable blade on the side of the moving direction of the fin and on the side facing the direction of movement of the fin.

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