JP2021098211A - Metal mold apparatus for manufacturing fin for heat exchanger - Google Patents

Abstract

To set a punch for special punching which operates independently from operation of an upper-mold die set so as to be able to operate the punch at high speed and to reduce influences of vibrations.SOLUTION: A metal mold apparatus for manufacturing a fin for a heat exchanger is equipped with: an upper-mold die set 32 provided with a punch 33 for forming a fin for a heat exchanger on a thin plate 41 made of metal, which is moved up and down by a first driving device 50; a lower-mold die set 34 provided with a die 36 paired with the punch 33; special punching punches 60 that are driven by a second driving device 66 so as to punch the thin plate 41 of metal one time per multiple numbers of times of descending movements of the upper-mold die set 32, while moving up and down together with the upper-mold die set 32; and special punching dies 62 provided at positions opposing to the special punching punches 60 in the low-mold die set 34.SELECTED DRAWING: Figure 4

Description

The present invention relates to a mold device for manufacturing fins for a heat exchanger.

A heat exchanger such as a cooler is configured by inserting a heat exchange pipe for circulating a heat medium into a through hole of a laminated fin formed by laminating a plurality of heat exchanger fins having through holes formed therein.
The heat exchanger fins are usually formed by press working in a mold device.

For example, Patent Document 1 shows a mold device that punches a thin metal plate such as aluminum.
The mold device includes an upper die set that moves up and down and a lower die set. The upper die set is located above the thin metal plate and the lower die set is located below the thin metal plate.
The upper die set is provided with a punch for punching a thin metal plate, and the lower die set is provided with a die through which the punch enters.
A thin metal plate is intermittently supplied to the mold device, and the thin metal plate is pressed.

When manufacturing heat exchanger fins using a die device, special punching is required at a timing different from the press timing of the die device, such as through holes for inserting heat exchange tubes, at places used during stacking. May be.
In such a case, the die device moves up and down at the press timing for forming the through hole, but for special punching, the die device operates only once out of a plurality of press timings for forming the through hole. Perform special punching.

A mold device for performing such special punching is disclosed in Patent Document 1 (Patent No. 6112242).
The die apparatus described in Patent Document 1 is provided with a punch for special punching that is driven separately from the operation of the upper die set.
The punch for special punching is provided in the small upper die set provided separately from the upper die set, and the small upper die set is moved up and down to drive the special punching punch.

Japanese Patent No. 6112242

In Patent Document 1, the small upper die set is moved up and down when driving the special punching punch, but in the present situation where the small upper die set is becoming larger, the heavy small upper die set is moved up. It is becoming difficult to drive it separately from the mold die set. For this reason, there is no choice but to increase the size of the drive device for driving only the small upper die set, and there is a problem that the entire device becomes large.
Further, in the current situation where the operation of the upper die set is increasing in speed, the vertical movement of the small upper die set must also be increased in speed. However, it is difficult to operate the large upper die set as described above at high speed, and if the small upper die set is operated separately from the upper die set, vibration occurs. There is also a risk that it will end up.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is a die device provided with a special punching punch, which is capable of high-speed operation and can reduce the influence of vibration. To provide the device.

According to the mold apparatus for manufacturing heat exchanger fins according to the present invention, in the mold apparatus for manufacturing heat exchanger fins, a punch for forming the heat exchanger fins is provided on a thin metal plate. The upper die set that is moved up and down by the first drive device, the lower die set provided with the die paired with the punch, and the upper die set that moves up and down integrally with the upper die set. A special punching punch driven by a second driving device so as to punch out a thin metal plate only once in a plurality of lowering operations of the die set, and a special punching punch provided at a position facing the special punching punch in the lower die set. It is characterized by having a special punching die.
By adopting this configuration, the special punching punch moves up and down integrally with the upper die set, and the second drive device punches the thin metal plate only once in each of the lowering operations of the upper die set. Since it is driven by the above, the size of the device can be reduced, the speed of driving the special punching punch can be increased, and the influence of vibration can be reduced.

Further, the special punching punch may be provided, and a small upper die set that is fixed to a part of the upper die set and moves up and down together with the upper die set may be provided.
According to this configuration, since the special punching punch is provided on the small upper die set fixed to the upper die set, the accuracy of the special punching punch can be easily obtained and maintenance can be easily performed.

Further, the second drive device may be provided on the small upper die set and may be characterized in that it moves up and down integrally with the upper die set and the small upper die set.
According to this configuration, the second drive device is not arranged outside the mold device, and a compact configuration can be achieved.

Further, the second drive device is arranged above the first cam portion formed in an uneven shape on the upper surface of the special punching punch and above the special punching punch, and has a concave-convex shape so as to mesh with the first cam portion. By moving the second cam portion formed and movable in the horizontal direction and the second cam portion in the horizontal direction, and pressing the convex portion of the first cam portion by the convex portion of the second cam portion. It may be characterized by having a linear motion device for driving the special punching punch and an urging means for urging the special punching punch upward.
According to this configuration, the second cam portion moves horizontally with respect to the upper surface of the special punching punch and presses the convex portion of the first cam portion against the urging force of the urging means to press the special punching punch. Can be lowered. Further, when the convex portion of the first cam portion is separated from the convex portion of the second cam portion, the special punching punch is raised by the urging force of the urging means.

Further, the second cam portion may be provided with a cam follower that comes into contact with the first cam portion.
According to this configuration, the cam follower comes into contact with the first cam portion of the special punching punch, so that the cam operation can be smoothly performed.

Further, when the second cam portion does not press the first cam portion, the cam follower is in contact with an inclined surface from the concave portion to the convex portion of the first cam portion, and the first cam portion and the first cam portion are described. It may be characterized in that a gap is formed between the second cam portion and the second cam portion.
According to this configuration, since the cam follower can come into contact with the first cam portion by line contact at one point, it is possible to prevent wear and breakage of both cam portions and to perform smooth cam operation.

According to the mold apparatus for manufacturing fins for heat exchangers of the present invention, high-speed operation is possible when driving a special punch, and the influence of vibration can be reduced.

It is explanatory drawing which shows the whole structure of the fin manufacturing apparatus for a heat exchanger. It is a top view of a small upper die set. It is a top view of the small lower die set. It is a side view of the mold apparatus for manufacturing a fin for a heat exchanger. It is an enlarged view of the 2nd drive device when the special punching punch is raised. It is an enlarged view of the 2nd drive device in which a special punch punch is in the process of descending. It is an enlarged view of the 2nd drive device when the special punching punch is lowered. It is explanatory drawing which shows the contact point of the cam follower when the 1st cam part and the 2nd cam part are meshing with each other.

Hereinafter, a mold device for manufacturing fins for a heat exchanger (hereinafter, may be simply referred to as a mold device) according to the present embodiment will be described with reference to the drawings.
The overall configuration of the heat exchanger fin manufacturing apparatus is shown in FIG.
The thin plate 41 made of unprocessed metal such as aluminum is coiled around the uncoiler 40. The thin plate 41 pulled out from the anchorer 40 is inserted into the loop controller 42, and the fluttering of the thin plate 41 that is intermittently fed is suppressed by the loop controller 42.

An NC feeder 44 is provided on the downstream side of the loop controller 42. The NC feeder 44 is composed of two rollers that come into contact with the upper surface and the lower surface of the thin plate 41, and the two rollers are rotationally driven to sandwich the thin plate 41 with each other and intermittently feed the thin plate 41.

A mold device 30 is provided on the downstream side of the NC feeder 44. The mold device 30 includes an upper die set 32 and a lower die set 34 inside, and the upper die set 32 moves up and down with respect to the lower die set 34 to press the thin plate 41.

The upper die set 32 is provided with a plurality of punches 33 for forming through holes and notches in the thin plate 41, and the punch 33 of the upper die set 32 enters the lower die set 34. A plurality of dies 36 are provided.

The upper die set 32 is driven by the first driving device 50. The first drive device includes a motor 52 and a crankshaft 54 that converts the rotational drive of the motor 52 into a drive in the vertical direction, and the crankshaft 54 is connected to the upper die set 32.
The rotational driving force of the motor 52 is converted into a vertical driving force by the crankshaft 54, and the crankshaft 54 moves the upper die set 32 up and down at a predetermined timing.

On the downstream side of the mold device 30, a transport device 56 having a feed pin 55 that enters through a through hole or a notch formed by the mold device 30 is provided. The transfer device 56 operates in synchronization with the NC feeder 44 so that the upper die set 32 and the lower die set 34 of the mold device 30 intermittently feed the thin plate 41 between the mold openings.

On the downstream side of the transport device 56, an inter-row slit device for cutting a thin plate 41 into a plurality of rows parallel to the transport direction in order to form a narrow metal strip, and a metal strip are cut to a predetermined length. A stacker for accumulating heat exchanger fins formed by being cut by a cut-off device and a cut-off device is not described in detail here.

Further, in the fins for heat exchangers, in addition to the through holes and notches into which the heat exchange tubes are inserted, it is necessary to have punched portions formed at intervals different from the forming intervals of the through holes and notches at places used during stacking. There is something. Hereinafter, such punching is referred to as special punching.
In the present embodiment, a special punching punch 60 is provided in the upper die set 32 of the die device 30, and a special punching die 62 is provided at a position facing the special punching punch 60 of the lower die set 34.

A small upper die set 64 provided with a special punch 60 is provided as a part of the upper die set 32. The small upper die set 64 is fixed to the upper die set 32 and moves up and down integrally with the upper die set 32.
The special punching punch 60 is driven by a second drive device 66 (described later) that operates only once out of a plurality of mold closing operations of the upper die set 32. The second drive device 66 is arranged on the small upper die set 64.

FIG. 2 shows a part of the plan view of the small upper die set, and FIG. 3 shows a part of the plan view of the small upper die set at a position facing the small upper die set.
Further, FIG. 4 shows a cross-sectional view (side view) of the mold apparatus including the small upper die set as viewed from the side surface of the thin plate in the transport direction.

The small upper die set 64 is fixedly provided to a part of the upper die set 32, and moves up and down with the vertical movement of the upper die set 32.
The small upper die set 64 is provided with a plurality of special punches 60 along a direction orthogonal to the transport direction of the thin metal plate 41. In the present embodiment, the special punching punches 60 adjacent to each other in the width direction are arranged alternately so that the positions in the conveying direction are different between the adjacent punches 60.

A special punching die 62 is provided at a position of the lower die set 34 facing the special punching punch 60 of the small upper die set 64. In this embodiment, a small lower die set 35 provided with a special punching die 62 is provided as a part of the lower die set 34.
The thin plate 41 is punched by the special punching punch 60 entering the special punching die 62.

The upper surface of the special punch 60 is formed with a first cam portion 70 having irregularities formed along the transport direction of the thin metal plate 41. The punch punch 60 projects downward from the through hole 74 formed in the punch holding portion 71 of the small upper die set 64.
The upper surface of the special punch 60 is formed as a first cam portion 70 and a flange portion 75 having a diameter larger than that of the through hole 74.

The punch holding portion 71 is provided with an urging member 77 that abuts on the lower surface of the flange portion 75 of the special punched punch 60 to urge the special punched punch 60 upward. The urging member 77 is urged in a direction of pushing up the flange portion 75 by a spring, and raises the special punching punch 60 when the special punching punch 60 is not driven.
Further, when the special punching punch 60 is driven and lowered, the flange portion 75 descends against the urging force of the urging member 77.

Above the first cam portion 70, a second cam portion 72 having irregularities formed downward so as to mesh with the first cam portion 70 is provided.
The second cam portion 72 is provided so as to be movable along the transport direction in the horizontal plane. A linear motion device 78 is provided in the second cam portion 72, and the linear motion device 78 reciprocates the second cam portion 72 in the horizontal plane along the transport direction.

Further, as shown in FIG. 2, the linear motion device 78 is specifically an air cylinder, and drives the rod 80 by sucking and discharging air. The tip of the rod 80 is provided with connecting members 82 connected to one or more second cam portions 72, and one air cylinder 78 is one or more (three in the example of FIG. 2). 2 The cam portion 72 is reciprocated.

Next, the driving operation of the special punching punch 60 will be described in detail.
FIG. 5 shows a state in which the special punching punch is in the raised position, FIG. 6 shows a state in which the special punching punch is operating, and FIG. 7 shows a state in which the special punching punch is operating and is in the lowered position. Further, FIG. 8 shows an enlarged view of the vicinity of the cam follower when the special punching punch is rising.

The first cam portion 70 of the special punch 60 has a concave portion 88 having a horizontal plane, a convex portion 90 formed above the concave portion 88 and having a horizontal plane at the tip, and an inclined surface 92 connecting the concave portion 88 and the convex portion 90. Are formed in plurality.

The second cam portion 72 has a shape in which irregularities are formed on the lower surface of the first cam portion 70 so as to face the surface on which the irregularities are formed, and the second cam portion 72 meshes with the first cam portion 70. The second cam portion 72 has a convex portion 94 that protrudes downward and has a horizontal plane at the tip, a concave portion 96 that has a horizontal plane and is recessed upward, and an inclined surface 98 that connects the convex portion 94 and the concave portion 96, respectively. Multiple are formed.
Further, a cam follower 100 is provided at a position of the second cam portion 72 from the convex portion 94 to the inclined surface 98. The cam follower 100 is provided so as to come into contact with the first cam portion 70 and rotate freely with respect to the moving direction of the second cam portion 72.

As shown in FIG. 5, when the special punching punch 60 is raised, the rod 80 of the air cylinder 78 is contracted, and the convex portion 94 of the second cam portion 72 enters the concave portion 88 of the first cam portion 70. The second cam portion 72 is located at a position where the convex portion 90 of the first cam portion 70 enters the concave portion 96 of the second cam portion 72.
Although the urging member 77 (FIG. 4) is omitted in FIGS. 5 to 7, in the state of FIG. 5, the urging member 77 pushes up the flange portion 75, so that a special punching punch is used. 60 is rising.

As shown in FIG. 6, when the rod 80 of the air cylinder 78 pushes the connecting member 82, the second cam portion 72 starts moving.
The inclined surface 92 of the first cam portion 70 is formed so as to face upward along the traveling direction of the second cam portion 72, the cam follower 100 rolls on the inclined surface 92, and the cam follower 100 is the first cam portion 70. The inclined surface 92 is gradually pushed down. Then, the special punch 60 is gradually lowered.

FIG. 7 shows where the special punch 60 has reached bottom dead center. When the rod 80 of the air cylinder 78 pushes the second cam portion 72 via the connecting member 82, the cam follower 100 of the second cam portion 72 moves from the inclined surface 92 of the first cam portion 70 to the convex portion 90. The second cam portion 72 moves and completely pushes down the special punching punch 60. In this way, the bottom dead center is determined by the convex portion 90 of the first cam portion 70 and the convex portion 94 of the second cam portion 72, and at this position, the special punching punch 60, together with the special punching die 62, forms a thin metal plate 41. Punch out.

After that, the operation of the air cylinder 78 operates in the direction of contracting the rod 80. Then, the cam follower 100 of the second cam portion 72 returns to the position of the concave portion 88 from the convex portion 90 of the first cam portion 70 via the inclined surface 92.
Then, the flange portion 75 of the special punch 60 is pushed up by the urging member 77, and the special punch 60 rises.

As shown in FIG. 8, when the second cam portion 72 does not press the first cam portion 70, the cam follower 100 makes line contact with one point of the inclined surface 92 of the first cam portion 70. At this time, the portion of the second cam portion 72 other than the cam follower 100 does not come into contact with the first cam portion 70.
Therefore, a gap is formed between the first cam portion 70 and the second cam portion 72, and the second cam portion 72 can be smoothly moved. In addition, it is possible to prevent wear and tear of both cam portions.

The drive source for reciprocating the second cam portion 72 is not limited to an air cylinder, and a hydraulic cylinder, a linear actuator, or the like can be adopted.

Further, in the above-described embodiment, an example in which the special punching punch is provided on the small upper die set has been described, but the small upper die set may not be provided and the special punching punch may be provided on the upper die set. Further, the second drive device may not be provided on the small upper die set.

The present invention has been described in various ways with reference to suitable embodiments, but the present invention is not limited to this embodiment, and it goes without saying that many modifications can be made without departing from the spirit of the invention. ..

30 Mold device 32 Upper die set 33 Punch 34 Lower die set 35 Small lower die set 36 Die 40 Uncoiler 41 Thin plate 42 Loop controller 44 NC feeder 50 First drive device 52 Motor 54 Crankshaft 55 Feed pin 56 Conveyor device 60 Special punching punch 62 Special punching die 64 Small upper die set 66 2nd drive device 70 1st cam part 71 Punch holding part 72 2nd cam part 74 Through hole 75 Flange part 77 Bounce member 78 Linear motion device (air cylinder) )
80 Rod 82 Connection member 88 Concave part 90 Convex part 92 Inclined surface 94 Convex part 96 Concave part 98 Inclined surface 100 Cam follower

Claims (6)

In a mold device for manufacturing fins for heat exchangers
An upper die set that is provided with punches for forming heat exchanger fins on a thin metal plate and is moved up and down by the first drive device.
A lower die set provided with a die paired with the punch,
A special punching punch that is driven by a second drive device so as to punch out a thin metal plate only once in each of a plurality of lowering operations of the upper die set while moving up and down integrally with the upper die set.
A die apparatus for manufacturing fins for a heat exchanger, which comprises a special punching die provided at a position facing the special punching punch in the lower die set. The heat exchanger according to claim 1, wherein the special punching punch is provided, and a small upper die set that is fixed to a part of the upper die set and moves up and down together with the upper die set is provided. Mold equipment for fin manufacturing. The fin manufacturing for a heat exchanger according to claim 2, wherein the second drive device is provided on the small upper die set and moves up and down integrally with the upper die set and the small upper die set. Mold device. The second drive device is
The first cam portion formed unevenly on the upper surface of the special punching punch, and
A second cam portion that is arranged above the special punching punch, is formed in an uneven shape so as to mesh with the first cam portion, and can move in the horizontal direction.
A linear motion device that drives the special punching punch by moving the second cam portion in the horizontal direction and pressing the convex portion of the first cam portion by the convex portion of the second cam portion.
The die apparatus for manufacturing fins for a heat exchanger according to any one of claims 1 to 3, further comprising an urging means for urging the special punching punch upward. The mold device for manufacturing fins for a heat exchanger according to claim 4, wherein the second cam portion is provided with a cam follower that comes into contact with the first cam portion. When the second cam portion does not press the first cam portion, the cam follower is in contact with an inclined surface from the concave portion to the convex portion of the first cam portion, and the first cam portion and the second cam portion are in contact with each other. The mold device for manufacturing fins for a heat exchanger according to claim 5, wherein a gap is formed between the cam portion and the cam portion.

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