JP2015123454A - Manufacturing apparatus for heat exchanger fin, exchanger fin, and exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a space required for arrangement of a fin manufacturing apparatus and the manufacturing cost of fins.SOLUTION: A manufacturing apparatus for heat exchanger fins comprises a press device carries out mold processing necessary as a fin to a metal sheet P constituting a fin blank, an overhang member so attached as to extend outward with respect to the press device to act as a part of the press device, and a shearing device 100 that cuts the metal sheet P having undergone mold processing necessary as a fin at a preset position. The shearing device 100 is mounted at the tip of the overhang member. Further, the shearing device 100 keeps a shear angle formed at least at one tip 121, 141 of an upper blade 120 and a lower blade 140 constituting the shearing device 100.

Description

  The present invention relates to a heat exchanger fin manufacturing apparatus, a heat exchanger fin manufactured by the manufacturing apparatus, and a heat exchanger using the fin.

  As a conventional heat exchanger fin manufacturing apparatus, when the number of processing steps is large with respect to the apparatus size in the workpiece feeding direction of the press apparatus, a plurality of press apparatuses have been used. As an example of such a manufacturing apparatus, a manufacturing apparatus described in Patent Document 1 can be given.

  In the manufacturing apparatus of Patent Document 1, a mold that performs a necessary forming process on the fin and a shearing apparatus that cuts a metal thin plate that has been subjected to the forming process at a preset position are provided by separate press apparatuses. It was operating.

JP 2012-183554 A

  However, if a plurality of press devices are used in this way, the processing equipment becomes large. For this reason, the required space for arrangement | positioning of the manufacturing apparatus of a fin becomes large. Moreover, since the fins for heat exchangers are manufactured using a plurality of press devices, the cost increases.

  The present invention provides a heat exchanger fin manufacturing apparatus capable of reducing the space required for arranging the heat exchanger fin manufacturing apparatus and reducing the manufacturing cost, and heat exchange manufactured by the manufacturing apparatus. An object is to provide a fin for a device and a heat exchanger using the fin.

  A heat exchanger fin manufacturing apparatus that solves the above-described problems is attached to a press device that performs a forming process necessary as a fin on a metal thin plate that forms a fin material, and to extend outwardly with respect to the press device. In addition, an overhang member that operates as a part of the press device, and a shearing device that cuts a metal thin plate that has been subjected to a forming process necessary as a fin at a preset position, the shearing device includes: The shearing device is attached to the tip of the overhang member, and the shearing device has a shear angle formed on at least one of the upper blade and the lower blade constituting the shearing device.

  According to such a configuration, the process of performing the necessary forming process on the metal thin plate forming the fin material and the step of cutting the metal thin plate subjected to the forming process into a predetermined length are overhanged. It can process with one press apparatus through a member. For this reason, the required space for arrangement | positioning of a fin manufacturing apparatus can be made small, and the manufacturing cost of a fin can be made low.

  Further, since a shear angle is formed on at least one of the upper blade and the lower blade, the shearing force accompanying the operation of the shearing device is equalized with respect to the operating time of the shearing device. For this reason, the bending moment based on the reaction force with respect to a shear force becomes small. Thereby, the bending moment which acts on a press apparatus, an overhang member, etc. among the manufacturing apparatuses of the heat exchanger fin is reduced. Thereby, it is easy to hold | maintain a press apparatus, an overhang member, etc. in the set position. For this reason, the precision of the required shaping | molding process with respect to a metal thin plate is raised.

  In the fin manufacturing apparatus, the press device includes an upper die set and a lower die set extending outward from the press device, and the overhang member extends outward in the upper die set. It is preferable to be fixed to the protruding portion.

  According to such a structure, the metal mold | die for performing a required shaping | molding process with respect to a metal thin plate is arrange | positioned also in the part extended outward from the press apparatus among the upper die set and the lower die set. be able to. For this reason, the number of processing steps that can be performed on the metal thin plate can be increased.

  In the fin manufacturing apparatus, the pressing device includes a collar part processing mold for forming a collar part through which a heat transfer tube is inserted into the metal thin plate, and a slit processing mold for forming inter-row slits between the formed collar parts. And a pitch feeder for controlling the pitch feed of the metal thin plate, wherein the slit machining die is installed in a portion of the upper die set that extends outward from the press device, and the pitch It is preferable that the feeder is installed in a portion of the lower die set that extends outward from the press device.

  According to such a configuration, the bending moment acting on the slit machining die is reduced with the operation of the shearing device. For this reason, it is easy to hold | maintain the slit process metal mold | die in the set position. For this reason, it is possible to form the inter-row slits with high accuracy for the thin metal plate.

The said fin manufacturing apparatus WHEREIN: It is preferable that the shear angle is formed only in the blade edge | tip of the said upper blade which comprises the said shearing apparatus.
The metal thin plate conveyed to the shearing device is supported by the lower blade. When the upper blade approaches the lower blade and meshes with the lower blade, the thin metal plate is cut to a predetermined length. Therefore, according to the heat exchanger fin manufacturing apparatus described above, the shear angle is formed only at the blade edge of the upper blade, so that the metal thin plate can be supported by the entire blade edge of the lower blade. For this reason, a metal thin plate can be cut | disconnected in a stable state compared with the structure by which the shear angle is formed in the lower blade.

The heat exchanger fin that solves the above problem is manufactured by the heat exchanger fin manufacturing apparatus.
According to such a configuration, since the bending moment acting on the pressing device and the overhang member is reduced, the pressing device and the overhang member are easily held at the set positions. For this reason, the precision of the required shaping | molding process with respect to a metal thin plate is raised. Thereby, the fin of the stable quality can be provided.

A heat exchanger that solves the above-described problems uses the heat exchanger fins.
According to such a configuration, since the bending moment acting on the pressing device and the overhang member is reduced, the pressing device and the overhang member are easily held at the set positions. For this reason, the quality of the fin used for a heat exchanger is stabilized. Thereby, the heat exchanger of the stable quality can be provided.

  According to the heat exchanger fin manufacturing apparatus, the heat exchanger fin, and the heat exchanger, the required space for arranging the heat exchanger fin manufacturing apparatus can be reduced, and the fin manufacturing cost can be reduced. Can contribute.

It is a figure regarding the fin of the cross fin tube type heat exchanger concerning an embodiment, (a) is a top view and (b) is an AA sectional view. It is the whole schematic drawing of the manufacturing apparatus of the fin for the heat exchanger, Comprising: The processing procedure is shown. The side view of the shearing apparatus in the manufacturing apparatus of the same heat exchanger fin. The front view of the shearing apparatus in the manufacturing apparatus of the heat exchanger fin. It is a figure regarding the shearing apparatus in the manufacturing apparatus of the same fin for heat exchangers, Comprising: The front view of a shearing apparatus when the blade edge of an upper blade and the blade edge of a lower blade begin to mesh. It is a figure regarding the shearing apparatus in the manufacturing apparatus of the same fin for heat exchangers, Comprising: The front view of the shearing apparatus of the state in which the blade edge of an upper blade and the blade edge of a lower blade are meshing. It is a figure regarding the shearing apparatus in the manufacturing apparatus of the same heat exchanger fin, Comprising: The front view of a shearing apparatus when a metal thin plate is cut | disconnected. The graph which shows the relationship between the bending moment which generate | occur | produces with operation | movement of a shearing apparatus, and cutting time. The front view of the upper blade of other embodiment. The front view of the upper blade of other embodiment. The front view of the upper blade of other embodiment, and a lower blade.

  A specific example of the heat exchanger fin manufacturing apparatus will be described below with reference to the drawings. The heat exchanger fin manufacturing apparatus is not limited to these exemplifications, and is shown by the scope of claims, meanings equivalent to the scope of claims, and all claims within the scope of claims. It is intended to include changes.

[Description of fins for heat exchanger manufactured by this manufacturing apparatus]
First, a schematic configuration of the heat exchanger fin according to the present embodiment will be described.
As shown to Fig.1 (a), this fin 1 for heat exchangers is used for heat exchangers, such as an indoor unit of an air conditioner, for example, Comprising: The color for making a heat exchanger tube penetrate in zigzag form Part 10 is provided. As an example, the collar portion 10 is formed in two rows and six stages. As an example, a set of four bulging fins (hereinafter referred to as louver fins 20) is formed between the rows of each row of the collar portion 10. Perforated slits 30 are formed between the rows of the collar portions 10.

  As shown in FIG. 1B, the collar portion 10 is formed with a large-diameter, dish-shaped seat portion 11 that forms a small rise. The seat portion 11 has a guide function when the fins 1 are stacked. Further, a vertical cylindrical portion 12 is formed above the seat portion 11. The vertical cylindrical portion 12 functions as a portion into which the heat transfer tube 40 is inserted, and improves heat transfer between the heat transfer tube 40 and the fins 1. For this reason, the heat transfer tube 40 is expanded after being inserted into the collar portion 10 formed into a predetermined shape. In addition, a flared portion 13 is formed above the vertical cylindrical portion 12. The flared portion 13 has a function of maintaining a constant pitch when the fins 1 are stacked.

  The louver fin 20 improves the heat transfer coefficient of the fin 1 by a so-called leading edge effect. The louver fin 20 is cut in the step direction, and has a shape raised from the base of the fin 1 at both ends in the step direction. In addition, what is shown by FIG. 1 is an example of the shape of the louver fin 20, As a shape of the louver fin 20, various shapes are employable.

  The perforated slits 30 formed between the rows of the collar portions 10 are cut in the step direction. By forming the slits 30 in the fins 1, the fins 1 can be easily divided between the rows. In addition, the purpose of forming the slit 30 is to conduct heat conduction between the heat transfer tube 40 on the inlet side and the heat transfer tube 40 on the outlet side in a heat exchanger such as an outdoor coil used as a condenser. Some are formed for the purpose of promoting liquefaction and supercooling of the refrigerant by reducing. Another purpose is to form a continuous slit in the column direction in order to simply divide the column. The slit 30 of this embodiment can be replaced with these slits.

[Overview of the heat exchanger fin manufacturing equipment]
Next, an outline of a fin manufacturing apparatus for manufacturing such a fin 1 will be described.
As shown in FIG. 2, the present fin manufacturing apparatus includes an uncoiler 50 in which a thin metal plate P such as aluminum that forms the material of the fin 1 is wound in a coil shape. The thin metal plate P is sent from the uncoiler 50 to the press device 52 via the loop controller 51.

  The press device 52 has a lower die fixed to the bed and an upper die fixed to the slide of the press device 52. In the fin manufacturing apparatus, the steps in manufacturing the fin 1 are diverse. For this reason, it is difficult to accommodate the dies of each process within the length range in the feed direction of the metal thin plate P of one press device 52. For this reason, in the press device 52, the lower die set 52A supporting the lower die is extended to the lower side in the feeding direction of the metal thin plate P. Similarly, the upper die set 52B supporting the upper die is extended to the lower side in the feed direction. Furthermore, the overhang member 52C is extended outward in the feeding direction of the metal thin plate P so as to compensate for the shortage of the extension dimension of the upper die.

  In the present embodiment, a shearing device 100 that performs a shearing process that is the final process of manufacturing the fin 1 is attached to the tip of the overhang member 52C. Further, a collar part processing die 60 for forming the collar part 10 on the metal thin plate P is supported by an upper die set 52B and a lower die set 52A in the press device 52. Further, a slit machining die 70 for forming a slit 30 (see FIG. 1) between the molded collar portions 10 is provided by a portion extended from the press device 52 in the upper die set 52B and the lower die set 52A. It is supported. A pitch feeder 80 for controlling the pitch feed of the metal thin plate P is installed in a portion extended from the press device 52 in the lower die set 52A.

Each of the steps A to I shown in the table of FIG. 2 is performed by the single press device 52 configured as described above.
In step A, the louver fin 20 is processed. In the process B to the process F, the processing of the collar portion 10 is sequentially performed. The metal thin plate P on which the collar portion 10 is formed through the process F is subjected to the inter-row slit processing and trimming processing in the step G. In the process H, the entire pitch feed is performed by the pitch feeder 80. In step I, which is the final step, shearing is performed in which the metal thin plate P is cut to a predetermined length. The metal thin plate P is completed as the heat exchanger fin 1 with the process I as the final process.

  In addition, the completed fin 1 is accommodated in the stacker 53 arrange | positioned at the lower side of the process I. The stacker 53 has a plurality of pins 53A that are erected in the vertical direction. By inserting the pins 53A into the collar portion 10, the fins 1 are laminated at a constant pitch.

  Further, the fin manufacturing apparatus is configured such that each step proceeds simultaneously in a plurality of rows so as to manufacture a plurality of fins from the metal thin plate P at the same time as in a conventionally known device. It should be noted that the number of fin rows can be set or fins having different numbers of rows can be simultaneously processed depending on which row of slits between successive rows is performed. Moreover, the number of fins manufactured simultaneously is determined by these settings. For example, in the case of the two rows and six stages of fins 1 shown in FIG. 1, the number of sheets produced at the same time is 20 or more. For this purpose, the fin manufacturing apparatus according to this embodiment processes each process. A plurality of molds to be performed are arranged in parallel.

[Configuration of shearing device]
As shown in FIG. 3, the shearing apparatus 100 has an upper blade hold 110 fixed to the overhang member 52C and a lower blade hold 130 fixed to the lower die set 52A. The upper blade hold 110 supports the upper blade 120. The lower blade hold 130 supports the lower blade 140.

  As shown in FIG. 4, the upper blade 120 has a shape in which the center portion of the blade edge 121 is recessed in the peak portion 122 on the opposite side of the blade edge 121. That is, the blade edge 121 has a shear angle. Further, the upper blade 120 is formed such that the blade span dimension LA is slightly longer than the width dimension LB of the metal thin plate P. 4 to 7, in order to illustrate the state when the upper blade 120 and the lower blade 140 are engaged with each other in an easy-to-understand manner, dots are attached to the lower blade 140 and the thin metal plate P is hatched. It was attached.

  On the other hand, in the lower blade 140, the shape of the blade edge 141 is substantially linear. The shape of both ends of the blade edge 141 is an R shape. The lower blade 140 is formed such that the blade span dimension LC is equal to the blade span dimension LA of the upper blade 120.

[Operation of shearing device]
Next, the operation of the heat exchanger fin manufacturing apparatus will be described.
As shown in FIG. 4, when the upper blade 120 is in the upper position and is separated from the lower blade 140, the metal thin plate P that has undergone the process G passes a predetermined feeder on the lower blade 140 via the pitch feeder 80. Transferred to position. Next, when the pressing device 52 is operated, the upper blade 120 is lowered.

As shown in FIG. 5, as the upper blade 120 is lowered, the end portion of the blade edge 121 of the upper blade 120 and the blade edge 141 of the lower blade 140 come into contact with each other.
As shown in FIG. 6, when the upper blade 120 is further lowered, the meshing position between the blade edge 121 and the blade edge 141 changes from both ends of the blade edges 121 and 141 toward the center.

As shown in FIG. 7, when the center of the blade edge 121 and the blade edge 141 mesh with each other, the metal thin plate P is completely cut.
By the way, a reaction force is generated with respect to the shearing force generated by the series of descending operations of the upper blade 120 as described above. Based on the reaction force, a bending moment acts on the press device 52, each die, the overhang member 52C, and the like.

  The graph shown by the broken line in FIG. 8 is an explanatory diagram of an example of a change in bending moment generated by the meshing of the conventional upper blade and lower blade. Both the cutting edges of the conventional upper and lower blades are generally linear. Therefore, a relatively large bending moment MA is generated at the cutting time ΔTA, which is the time from the time ta when the upper blade edge and the lower blade edge are engaged to the time tb when the metal thin plate P is completely cut. .

  On the other hand, the graph shown with the continuous line of FIG. 8 is explanatory drawing of an example of the change of the bending moment which generate | occur | produces by mesh | engagement with the upper blade 120 and the lower blade 140 of this embodiment. Since the shear angle is formed in the blade edge 121 of the upper blade 120, the time tc when the metal thin plate P is completely cut when the upper blade 120 is lowered with the same stroke as the conventional stroke is from the conventional time tb. Will also be late. That is, the cutting time ΔTB is slightly longer than the conventional cutting time ΔTA. For this reason, compared with the prior art, the shearing force generated by the engagement of the upper blade 120 and the lower blade 140 is equalized with respect to the operating time (cutting time ΔTB) of the press device 52. For this reason, the bending moment which is a reaction force against the shearing force is a bending moment MB smaller than the bending moment MA.

[Effect of the embodiment]
Since the heat exchanger fin manufacturing apparatus according to the present embodiment is configured as described above, the following effects can be obtained.

  (1) The overhang member 52C includes a step of performing a necessary forming process on the metal thin plate P forming the fin material and a shearing step of cutting the metal thin plate P subjected to the forming process into a predetermined length. Thus, processing can be performed by one press device 52. For this reason, the required space for arrangement | positioning of the manufacturing apparatus of a fin can be made small.

  (2) Since the shear angle is formed at the blade edge 121 of the upper blade 120, the shearing force accompanying the operation of the shearing device 100 is equalized with respect to the operation time of the press device 52. For this reason, the bending moment based on the reaction force with respect to a shear force becomes small. Thereby, the bending moment which acts on the press apparatus 52, each metal mold | die, overhang member 52C, etc. among the manufacturing apparatuses of the fin for heat exchangers is reduced. For this reason, including the process performed by the collar part processing mold 60, the mounting positions of the upper mold and the lower mold are easily held at the set positions. As a result, the precision of the molding process required as a fin for the metal thin plate P is increased.

  (3) Of the upper die set 52B and the lower die set 52A, a mold for performing a necessary forming process on the metal thin plate P is also arranged at a portion extending outward from the press device 52. Can do. For this reason, the number of processing steps that can be performed on the metal thin plate P can be increased.

  (4) The bending moment acting on the slit machining die 70 in the heat exchanger fin manufacturing apparatus is reduced. For this reason, it is easy to hold | maintain the attachment position of the slit process metal mold | die 70 in the set position. Thereby, the slit 30 can be accurately formed in the metal thin plate P.

  (5) A shear angle is formed only on the blade edge 121 of the upper blade 120. That is, since the cutting edge 141 of the lower blade 140 is substantially linear, the metal thin plate P can be supported by the entire cutting edge 141 of the lower blade 140. For this reason, compared with the structure in which the shear angle is formed in the blade edge | tip 141 of the lower blade 140, the metal thin plate P can be cut | disconnected in the stable state.

  (6) Since this manufacturing apparatus has a small bending moment based on the reaction force against the shearing force, the mounting positions of the upper mold and the lower mold are held at the set positions including the process performed by the collar part machining die 60. Cheap. For this reason, the precision of the shaping | molding process required as a fin with respect to the metal thin plates P is raised by manufacturing the fin 1 using this manufacturing apparatus. As a result, a stable quality fin 1 can be provided.

(7) Moreover, the heat exchanger of stable quality can be provided by manufacturing a heat exchanger using the fin 1 manufactured using this manufacturing apparatus.
[Modification]
In the said embodiment, it can also change as follows. The following modifications can be combined with each other within a technically consistent range.

  A shear angle having the same shape as the blade edge 121 of the upper blade 120 may be formed with respect to the blade edge 141 of the lower blade 140. Further, the shear angle may be formed only on the blade edge 141 of the lower blade 140. The shear angle shape as a modification of the upper blade 120 shown below can also be applied to the lower blade 140.

  -The shape of the shear angle of the blade edge 121 of the upper blade 120 is not limited to the shape of the said embodiment. For example, the modified upper blade 220 shown in FIG. 9 has a shape in which both ends of the blade edge 221 are retreated with respect to the peak 222.

-Only the one end side of the blade edge | tip 321 may be retracted | retreated with respect to the peak 322 like the upper blade 320 of the modification shown in FIG.
-Each cutting edge 421,441 can also be made into a curved shape like the modification of the upper blade 420 and the lower blade 440 of the modification shown in FIG.

  The perforated slit 30 is a refrigerant in a heat exchanger such as an outdoor coil used as a condenser by reducing heat conduction between the heat transfer tube 40 on the inlet side and the heat transfer tube 40 on the outlet side. It can be changed to a slit formed for the purpose of promoting liquefaction and supercooling. Further, in order to simply divide the row, it can be changed to a so-called full cut slit that forms a continuous slit in the step direction.

P ... Metal thin plate 1 ... Heat exchanger fin 10 ... Collar portion 11 ... Seat portion 12 ... Vertical cylindrical portion 13 ... Reflare portion 20 ... Louver fin 30 ... Slit 40 ... Heat transfer tube 50 ... Uncoiler 51 ... Loop controller 52 ... Press device 52A ... Lower die set 52B ... Upper die set 52C ... Overhang member 53 ... Stacker 53A ... Pin 60 ... Color part processing die 70 ... Slit processing die 80 ... Pitch feeder 100 ... Shearing device 110 ... Upper blade hold 120 ... Upper blade 121 ... Blade edge 122 ... Peak 130 ... Lower blade hold 140 ... Lower blade 141 ... Blade edge 142 ... Peak 220 ... Upper blade 221 ... Blade edge 222 ... Peak 320 ... Upper blade 321 ... Blade edge 322 ... Peak 420 ... Upper blade 421 ... Cutting edge 422 ... Peak 440 ... Lower cutting edge 441 ... Cutting edge

Claims (6)

A pressing device (52) for performing a forming process necessary as a fin on the metal thin plate (P) forming the fin material;
An overhang member (52C) attached to the press device (52) so as to extend outward and operating as a part of the press device (52);
A shearing device (100) for cutting a metal thin plate (P) that has been subjected to a forming process necessary as a fin at a preset position;
The shearing device (100) is attached to the tip of the overhang member (52C),
Furthermore, the shearing device (100) has a shear angle formed on at least one blade tip (121, 141) of the upper blade (120) and the lower blade (140) constituting the shearing device (100). Machine fin manufacturing equipment. The press device (52) has an upper die set (52B) and a lower die set (52A) extending outward from the press device (52),
The apparatus for manufacturing a fin for a heat exchanger according to claim 1, wherein the overhang member (52C) is fixed to an outwardly extending portion of the upper die set (52B). The pressing device (52) includes a collar part processing mold (60) for molding a collar part (10) through which a heat transfer tube (40) is inserted into the metal thin plate (P), and a molded collar part (10). A slit processing die (70) for forming inter-row slits (30) between them, and a pitch feeder (80) for controlling the pitch feed of the metal thin plate (P),
The slit machining die (70) is installed in a portion of the upper die set (52B) that extends outward from the press device (52), and the pitch feeder (80) The heat exchanger fin manufacturing apparatus according to claim 2, wherein the heat exchanger fin is installed in a portion of the set (52 </ b> A) that extends outward of the press device (52). The heat exchange according to any one of claims 1 to 3, wherein the shearing device (100) has a shear angle formed only at a blade edge (121) of the upper blade 120 constituting the shearing device (100). Machine fin manufacturing equipment.   The heat exchanger fin manufactured by the manufacturing apparatus of the heat exchanger fin as described in any one of Claims 1-4.   The heat exchanger using the fin for heat exchangers of Claim 5.