WO2006090502A1

WO2006090502A1 - Corrugate-fin producing apparatus

Info

Publication number: WO2006090502A1
Application number: PCT/JP2005/017108
Authority: WO
Inventors: Kazuyoshi Ohtsuka; Masanao Karasawa
Original assignee: Hidaka Seiki Kabushiki Kaisha
Priority date: 2005-02-25
Filing date: 2005-09-16
Publication date: 2006-08-31
Also published as: CN1824404A; CN100427233C

Abstract

A producing apparatus that is capable of sequentially forming corrugated sections by a single closure of an upper die and a lower die and in which force is not applied in a direction inclined relative to the direction of movement of punches. The apparatus has two cam blocks (42) and a cam plate (39). The two cam blocks (42) each have pressing projections (49) formed on its lower side, and the pressing projections (49) come in contact with to-be-pressed projections (46) on the upper surface of each punch (40) to press individual punches (40), causing each punch (40) to move toward a die (36) against urging force of an urging means (44). The cam plate (39) moves the two pressing cam block (42) in a horizontal plane, in the direction where the pressing cam blocks (42) approach each other or in the direction where they separate from each other. The position at which a side wall (47) rises at the to-be-pressed projection (46) of each of the punches (40) is different for each punch (40) in order that the pressing projections (49) of the pressing cam blocks (42) are sequentially in contact with the to-be-pressed projections (46) of the punches (40) when the two pressing cam blocks (42) are moved in the horizontal plane, in the direction where they approach each other or in the direction where they separate from each other.

Description

Corrugated fin manufacturing equipment

Technical field

The present invention relates to a corrugated fin manufacturing apparatus used when manufacturing a corrugated fin used for heat exchange.

Background art

[0002] A heat exchanger used in an air conditioner for automobiles or the like has a corrugated fin 10 (see FIGS. 15 and 16) formed of a thin metal plate and a plurality of corrugated portions 12 formed on a plate-like body. Some have adopted a configuration arranged inside.

By arranging the corrugated fins in such a tube, heat exchange of the medium circulating in the tube can be performed efficiently.

In order to manufacture the corrugated fin 10 which is strong, even if it tries to form all the corrugated parts 12 at once, it cannot be produced because there is a metal bow I indentation. There is a need.

For this reason, in order to form the corrugated portion by pressing, only one corrugated portion can be formed per mold closing, and there is a problem that production efficiency is poor.

Therefore, as a method for manufacturing corrugated fins, a method of forming a plurality of corrugated portions sequentially by providing a plurality of gear-shaped forming rolls sandwiching a metal plate and sequentially passing each forming roll is well known. (See, for example, JP-A-2004-223686).

According to this method, the production efficiency increases compared to the case where one corrugated part is formed by one mold closing in press molding. However, this method has a problem that even if a curved corrugated portion can be formed, a rectangular corrugated portion cannot be formed.

Even in the method of passing the forming roll, the corrugated portion is formed into a rectangular shape as long as the corrugated portion is formed with the longitudinal direction of the corrugated portion parallel to the direction of entering the forming roll of the plate-like body. be able to. However, such a method has a problem that the number of forming rolls becomes multi-stage because the corrugated part is formed by half a mountain, and the total length of the line becomes too long. Therefore, in order to form a rectangular corrugated part in a compact line and with high production efficiency, it is possible to form several corrugated parts simultaneously in one process by press molding.

A plurality of punches are sequentially driven to form the corrugated portion in order. A forming apparatus has been proposed (see, for example, Japanese Patent Application Laid-Open No. 2003-115567).

As shown in the above-mentioned Japanese Patent Application Laid-Open No. 2003-115567, an apparatus capable of sequentially forming a plurality of corrugated portions with a single press is preferable because it can shorten the forming time and contribute to cost reduction.

The device disclosed in Japanese Patent Application Laid-Open No. 2003-115567 manufactures corrugated fins used for heat sinks such as CPUs, and therefore uses a horizontally driven cylinder.

However, the corrugated fins used for heat exchange ^^ in air conditioners are much larger than those used for heat sinks such as CPUs. In addition, because the strength must be high, corrugated fins used in air conditioner heat exchangers cannot be manufactured with the horizontal cylinder drive as in Patent Document 2, and the upper and lower molds cannot be manufactured. There was a need for a device that could form a plurality of corrugated parts in sequence by closing the mold once!

Further, the cam for driving the punch in Japanese Patent Laid-Open No. 2003-115567 moves in a predetermined one direction within a horizontal plane and presses the punch to move the punch up and down. The cam that moves in the horizontal direction first comes into contact with one end of the punch. Force is applied only to one end of the punch by the cam, and then the force is applied to the punch in the direction of cam movement. It will continue to take. In other words, a force inclined with respect to the moving direction of the punch is always applied to the punch.

For this reason, there is a problem that the corrugated portion cannot be formed with high accuracy, and there is a possibility that the punch or die may be unevenly worn by continuously applying force in a direction inclined with respect to the moving direction of the punch.

Disclosure of the invention

Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a plurality of corrugated fins in which a plurality of corrugated portions are formed by closing the upper die and the lower die once. The corrugated part can be formed sequentially and the punch moving direction An object of the present invention is to provide a manufacturing apparatus in which no force is applied in a tilted direction.

According to the corrugated fin manufacturing apparatus of the present invention, in a corrugated fin manufacturing apparatus for forming a corrugated fin having a plurality of corrugated portions from a metal plate-like body, the lower mold and the lower mold are in contact with and separated from the lower mold. A movable upper die, a die fixed to the lower die, and a biased upwardly via a biasing means above the die in the lower die, respectively. A plurality of punches which are attached to the die so as to be movable, and whose upper surfaces have side walls formed in a taper shape and are formed with pressed protrusions protruding upward, are in contact with and separated from each other in the horizontal direction. The pressing protrusion formed on the lower surface of the punch moves over the tapered side wall of each punch, contacts the pressed protrusion, presses each punch, and presses each punch. Move toward the die against the biasing force of The two pressing cam blocks are provided on the upper die, and the two pressing cam blocks are moved toward each other in a horizontal plane in accordance with the operation of bringing the upper die closer to the lower die or each other. A cam plate that moves in a separating direction, and when the two pressing force blocks move in a direction approaching or separating from each other in a horizontal plane, the pressing protrusions of the pressing cam block are provided for each punch. The rising positions of the side walls of the pressed protrusions of the punches are formed at different positions for each punch so as to sequentially contact the pressed protrusions of the punches. The two pressing cam blocks move the punches sequentially to the die by the mold closing operation.

The effect | action by employ | adopting this structure is as follows.

The plurality of punches according to the present invention are driven by two pressing cam blocks. The two pressing cam blocks are arranged above each punch and moved in the horizontal direction away from each other or in a direction approaching each other, thereby forming a pressing protrusion on the lower surface of the pressing cam block on the upper surface of each punch. The pressed protrusion is pressed. In this way, the two pressing cam blocks that move in different directions on the linear direction in the horizontal plane are inclined with respect to the punch moving direction with respect to the punch and do not exert a force in that direction. Each punch pressed by such a pressing cam block can move to the die in such a manner that it does not tilt with respect to the moving direction. In other words, the direction of the force applied to the punch is not fixed, and the punch is driven. It is possible to avoid applying force that tilts in the direction.

In addition, the pressed protrusions of each punch have different rising positions in each punch, and when the pressing cam block moves in the horizontal direction, the pressing protrusions of the pressing cam block come into contact with the pressed protrusions of each punch. Since the timing is different, multiple punches can be operated sequentially by one mold closing.

According to the corrugated fin manufacturing device, a plurality of punches are operated in sequence by a single mold closing of the upper mold and the lower mold, so that a plurality of corrugated portions of the corrugated fin can be formed by a single mold closing. . In addition, the two pressing cam block forces for driving the punch sequentially The upper die and the lower die are driven close to each other, or moved to move away from each other. The punch is not applied with a force in a direction that is inclined with respect to the driving direction of the punch, so that the corrugated fin can be manufactured with high accuracy, and uneven wear of the punch and die can be prevented.

Brief Description of Drawings

FIG. 1 is a side view of a corrugated fin manufacturing apparatus according to the present invention.

FIG. 2 is a side view showing the punch being sequentially lowered in the corrugated fin manufacturing apparatus of FIG.

FIG. 3 is a side view showing a state where the forming of the corrugated portion is completed by lowering all the punches in the corrugated fin manufacturing apparatus of FIG. 1.

FIG. 4 is a front view of the corrugated fin manufacturing apparatus.

FIG. 5 is a front view showing a state where the forming of the corrugated portion is completed by lowering all the punches in the corrugated fin manufacturing apparatus of FIG. 4.

FIG. 6 is an explanatory diagram for explaining the shapes of a plurality of punches.

FIG. 7 is an explanatory view showing a state of forming a corrugated portion by a plurality of punches and dies.

FIG. 8 is an explanatory view showing a state of forming a corrugated portion by a plurality of punches and dies.

FIG. 9 is an explanatory view showing a state of forming a corrugated portion by a plurality of punches and dies.

FIG. 10 is an explanatory view showing a state of forming a corrugated portion by a plurality of punches and dies.

FIG. 11 is an explanatory view showing a state where the pressing protrusion of the pressing cam block presses the pressed protrusion of the punch. FIG. 12 is an explanatory view showing a state where the pressing protrusion of the pressing cam block presses the pressed protrusion of the punch.

FIG. 13 is an explanatory view showing a state where the pressing protrusion of the pressing cam block presses the pressed protrusion of the punch.

FIG. 14 is an explanatory view showing a state where the pressing protrusion of the pressing cam block presses the pressed protrusion of the punch.

FIG. 15 is a plan view of a corrugated fin.

FIG. 16 is a partial cross-sectional view of a corrugated fin.

BEST MODE FOR CARRYING OUT THE INVENTION

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.

FIG. 1 is a side view showing the overall configuration of the corrugated fin manufacturing apparatus, and FIGS. 2 and 3 show the result of driving the punch in FIG.

Figs. 4 and 5 show Figs. 1 to 3 as viewed from the front.

The corrugated fin manufacturing apparatus 30 (hereinafter may be simply referred to as a manufacturing apparatus) applies a bending force to a thin metal plate 31 such as copper or aluminum by pressing to form a plurality of corrugated portions 12. This is a device for forming corrugated fins 10 (see FIGS. 15 and 16).

The manufacturing apparatus 30 includes a lower mold 34 and an upper mold 32 provided so as to be movable toward and away from the lower mold 34.

The lower die 34 includes a die 36 fixed on a base 35, a plurality of punches 40, 40,... And two pressing cam blocks 42 disposed above the plurality of punches 40, 40. have.

The upper mold 32 has a cam plate 39 that moves up and down, and drive means (not shown). The driving means is for driving the cam plate 39 in the vertical direction. For example, a hydraulic cylinder that drives the cam plate 39 in the upward and downward direction is used.

First, the configuration of the lower mold 34 will be described in detail.

The die 36 is fixed to the upper surface of the base 35 and has a plurality of irregularities according to the shape of the corrugated portion of the corrugated fin to be formed (see FIGS. 11 to 14). A bent portion 40a at the lower end of the punch 40, which will be described later, enters the concave portion 36a of the die 36 to bend the plate-like body, and the die 36 The convex portion 36b forms the peak portion of the corrugated portion 12.

A plurality of punches 40, 40... Are arranged along the conveying direction A of the plate-like body 31 above the die 36.

Each punch 40 is formed with a bent portion 40a which gradually becomes narrower toward the lower end side and sandwiches the plate-like body 31 with the die 36 to form a corrugated portion. The bent portion 40a is formed in a mountain shape protruding downward so as to fit into the concave portion 36a of the die 36.

Further, a step 40b is formed between the bent portions 40a of the adjacent punches 40 so that the convex portion 36b of the die 36 enters and fits. The tip of the convex portion 36b of the die 36 abuts on the stepped portion 40b to form a peak portion of the corrugated portion 12 of the corrugated fin 10.

Each punch 40 is formed wide along a direction C (hereinafter referred to as a punch width direction) C orthogonal to the conveying direction A of the plate-like body 31.

Both end portions in the width direction C of each punch 40 are formed as attachment portions 45 for attachment to the base 35 of the lower die 34, and upward between the punch support portions 38 provided on the base 35. It is attached via an urging means 44 that urges it toward. As the biasing means 44 of the present embodiment, a plurality of springs that can be compressed in the vertical direction are used.

On the upper surface of each punch 40, a pressed protrusion 46 is formed, which is in contact with a pressing protrusion 49 formed on the lower surface of a pressing cam block 42 for driving the punch 40. In the pressed protrusion 46, the side wall 47 is formed in a tapered shape, and the pressing protrusion 49 is easy to ride on. Further, the pressed protrusions 46 are formed at four locations along the width direction C by one punch 40.

Each punch 40 is formed so that the width of the upper surface of the pressed projection 46 becomes wider in the order in which the bending force is applied to the plate-like body 31 (see FIG. 6: FIG. 6 shows the number of punches and the number of punches). Omit the bottom edge of the punch.

In the present embodiment, the sequential corrugated portion is formed in the direction of arrow B in FIG. For this reason, the upper surface of the pressed projection 46 of the punch 40 located on the leading side in the conveying direction A of the plate-like body 31 is the widest, and the pressed surface of the punch 40 is moved toward the rear end side in the conveying direction A. The upper surface of the protrusion 46 is formed to be narrow! This will be explained based on FIG. 4 and FIG. 5. A plurality of punches 40 (here, eight punches) Of the punches 40 that first descend in the direction of the die 36, the tapered side wall 47 of the pressed projection 46 is formed at a position (position al) close to the pressing projection 49 of the pressing cam block 42. Further, the tapered side wall 47 of the pressed protrusion 46 of the punch descending in the direction of the die 36 is formed at a position (position a2) next to the pressing protrusion 49 of the pressing cam block 42.

Then, in order of descending in the direction of the die 36, the position of the tapered side wall 47 of the punch 40 gradually moves away from the pressing projection 49 of the pressing cam block 42, and finally the pressed projection 46 of the punch 40 that descends in the direction of the die 36. The tapered side wall 47 is formed at a position farthest from the pressing projection 49 of the pressing cam block 42 (position a8).

The pressing cam block 42 is disposed at a position that is always in contact with the upper surface of each punch 40 above each punch 40. That is, when the upper mold 32 and the lower mold 34 are opened, the pressing protrusion 49 of the pressing cam block 42 is in contact with a portion other than the pressed protrusion 46, and each punch 40 is pressed while the mold is closed. It is in contact with at least one of the protrusions 46. Two pressing cam blocks 42 are provided with the center in the width direction C of the punch 40 as a boundary, and can be moved along the width direction C of the punch 40, respectively. The movement of the pressing cam block 42 to be applied is restricted by the cam plate 39 of the upper mold 32 described later.

In this embodiment, the two pressing cam blocks 42 and 42 are located at the center of the width direction C of each punch 40 when the upper die 32 and the lower die 34 are opened (state shown in FIG. 4). When the upper die 3 2 and the lower die 34 are closed, they move in the direction in which they are separated from each other, that is, in the width direction C of the punch 40 (state in FIG. 5).

On the lower surface of each of the pressing cam blocks 42, 42, pressing protrusions 49 protruding downward are formed at two locations. The pressing protrusion 49 is formed in a reverse taper shape so that the width gradually decreases downward. When the upper mold 32 and the lower mold 34 are opened, the pressing protrusion 49 contacts the pressed protrusion 46 on the upper surface of each punch 40. It is in a position where it does not touch (state shown in Fig. 4). When the upper mold 32 and the lower mold 34 are closed, the pressing cam blocks 42, 42 move in the width direction C of the punch 40, and the pressing protrusions 49 are the widest coverings of the punches 40. Riding on the tapered side wall 47 of the pressing projection 46, the force of each punch 40 having the wide pressed projection 46 is pushed downward sequentially against the biasing force of the biasing means 44 (see FIG. 5). Status). The cam plate 39 provided in the upper mold 32 is formed with a cam groove 52 for accommodating the bearing 50 provided in each pressing cam block 42.

The cam groove 52 is formed in a shape that moves the pressing cam block 42 in the width direction C of the punch 40 as the cam plate 39 is lowered. That is, the cam groove 52 is formed obliquely so that the bearing 50 gradually moves in the width direction C of the punch 40.

Specifically, in the pressing cam block 42 shown in FIG. 4, the corresponding cam groove 52 for moving the pressing cam block 42 located on the right side in the direction of arrow D is formed so as to be directed diagonally upward to the right. Therefore, in order to move the pressing cam block 42 located on the left side in the direction of arrow E, the corresponding cam groove 52 is formed so as to be directed diagonally upward to the left!

Hereinafter, a method for manufacturing a corrugated fin based on the overall operation of the manufacturing apparatus 30 will be described. In a state where the upper mold 32 and the lower mold 34 are opened, a conveying device (not shown) conveys the plate-like body 31 between the die 36 and the punch 40.

Then, when the mold closing operation is started and the upper mold 32 is lowered toward the lower mold 34, the cam plate 39 is also lowered. The bearing 50 of the pressing cam block 42 is moved along the cam groove 52 of the cam plate 39, and the pressing cam block 42 moves in the horizontal direction.

The two pressing cam blocks 42 are moved in the horizontal direction by the cam plate 39 (arrow D and arrow E in FIG. 4).

Then, the pressing protrusion 49 provided on the lower surface of each pressing cam block 42 is placed on the upper surface of the pressing protrusion 46 of the punch 40 to be lowered first among the plurality of punches 40. Press down (see Figures 11-14).

As each pressing cam block 42 moves further in the horizontal direction, the width of the upper surface of the pressed protrusion 46 of each punch 40 is increased in order (the position of the tapered side wall 47 that is the rising of the pressed protrusion 46 is the position of the punch 40. The punches 40 are sequentially pushed downward in the order of the position close to the center of the width direction C).

The lowering punch 40 applies a bending force to the plate 31 between the die 36 and the die 36. Since the plurality of punches 40 are sequentially lowered in the leading force in the conveying direction A of the plate-like body 31, the corrugated portions are sequentially formed in the plate-like body 31 (see FIGS. 7 to 10).

When the upper mold 32 is located at the bottom dead center, the pressing protrusion 49 of the pressing cam block 32 has a plurality of patterns. It is located on the upper surface 46 of the pressed protrusion 46 of the punch 40 that descends most recently. At this position, all the punches 40 are lowered and the formation of all the corrugations with the die 36 is completed.

Thereafter, the driving means is driven and the upper die 32 starts to rise.

As the upper die 32 is raised, the cam plate 39 is also raised, and accordingly, the bearing 50 of each pressing cam block 42 is gradually moved along the cam groove 52 in the center direction of the width direction C of the punch 40.

As a result, the pressing protrusions 49 of the two pressing cam blocks 42 are also sequentially separated from the upper surface force of the pressed protrusions 46 of the punches 40 that have been pressed down. In other words, the pressing cam block 42 is released in the order in which the widths of the pressed protrusions 46 are narrow, and the pressing force from the pressing cam block 42 is released upward by the urging force of the urging means 44 in order from the punch 40 from which the pressing is released. Moving . When multiple punches 40 are raised in the reverse order, and the pressing protrusions 49 of the pressing force block 42 are separated from the pressed protrusions 46 of all punches 40, the upper die 32 reaches the top dead center, and one mold closing operation of the upper mold 32 and the lower mold 34 is completed.

Then, the plate-like body 31 on which the corrugated portion is formed is unloaded from the manufacturing apparatus 30 to the outside by the conveying means (not shown), and the manufacture of the corrugated fin is completed.

In the embodiment described above, the two pressing cam blocks are located at the center in the width direction of the punch when the mold is opened, and move away from each other when the mold is closed. As an invention, the movement of the two pressing cam blocks is not limited to the movement in such a direction. That is, when the mold is opened, the two pressing cam blocks are located at both ends in the width direction of the punch, and when the mold is closed, the punches are sequentially lowered by moving in directions toward each other. It may be a simple structure.

While the present invention has been described in detail with reference to preferred embodiments, it is needless to say that the present invention is not limited to these embodiments and can be modified in many ways without departing from the spirit of the invention.

Claims

The scope of the claims

In a corrugated fin manufacturing apparatus for forming a corrugated fin having a plurality of corrugated portions from a metal plate-like body,

With the lower mold,

An upper mold capable of moving toward and away from the lower mold;

A die fixed to the lower mold;

In the lower mold, the upper die is urged upward via an urging means, and is individually attached to the die so as to be movable, and each upper surface has a taper-like side wall. A plurality of punches formed with pressed protrusions that are formed and protrude upwards;

The pressing projections formed on the lower surface of the punches are over the tapered side walls of the punches to contact the pressed projections and press the punches. The punch is moved toward the die against the biasing force of the biasing means.

Two pressing cam blocks,

A cam plate that is provided on the upper mold and moves the two pressing cam blocks in a direction approaching or separating from each other in a horizontal plane in accordance with an operation of bringing the upper mold closer to the lower mold. And

When the two pressing cam blocks move in a direction approaching or separating from each other within a horizontal plane, the pressing protrusions of the pressing cam block are sequentially brought into contact with the pressed protrusions of the punches. The rising position of the side wall of the pressed projection of the force is formed at a different position for each punch,

The corrugated fin manufacturing apparatus, wherein the two pressing cam blocks sequentially move the punches to the die by one mold closing operation of the upper mold and the lower mold.