JP5445875B2 - Flat tube fins and flat tube fin manufacturing mold and metal strip feeder - Google Patents

Description

  The present invention provides a flat tube fin, a mold for manufacturing a flat tube fin, and a heat exchanger fin using the flat tube (flat tube fin) before feeding the metal strip in a stage before cutting to a predetermined length. Relates to the device.

Conventional heat exchangers such as coolers are generally configured by laminating a plurality of heat exchanger fins each having a plurality of through holes into which heat exchange tubes are inserted.
Such heat exchanger fins are manufactured by the heat exchanger fin manufacturing apparatus shown in FIG.
The heat exchanger fin manufacturing apparatus is provided with an uncoiler 12 in which a thin metal plate 10 such as aluminum is wound in a coil shape. The thin plate 10 drawn from the uncoiler 12 through the pinch roll 14 is inserted into the oil applying device 16, processing oil is adhered to the surface thereof, and supplied to the mold device 20 provided in the press device 18.

The mold apparatus 20 is provided with an upper die set 22 that can move up and down and a lower die set 24 that is stationary. The mold apparatus 20 forms a plurality of notches, through-holes, and the like (all not shown) having cut-and-raised portions of a predetermined height around them at predetermined intervals in a predetermined direction. .
Hereinafter, a metal thin plate in which a notch or a through hole is processed is referred to as a metal strip 11. The metal strip 11 is cut by a cutter 26 to a predetermined length after being transferred a predetermined distance in a predetermined direction. The product (heat exchanger fins) cut to a predetermined length is accommodated in the stacker 28. The stacker 28 has a plurality of pins 27 erected in the vertical direction, and stacks heat exchanger fins manufactured by inserting the pins 27 into the through holes formed in the heat exchanger fins. doing.

  In the conventional heat exchanger fin manufacturing apparatus, the press device 18 includes a metal strip 11 having notches and through holes formed at predetermined intervals in a predetermined direction, intermittently in the direction of the cutter 26. A feeding device for transport is provided.

The transfer of the metal strip 11 by the operation of the conventional feeding device will be described.
The feeding device has a reciprocating body that reciprocates along the transfer direction by a driving means, and a feed pin projects from the upper surface of the reciprocating body. The upper end portion of the feed pin is formed in a size that allows entry into the notch formed in the metal strip 11, and the feed pin that has entered the notch is moved by the reciprocating body moving in the transfer direction. The metal strip 11 is pulled to move the metal strip 11 in the transfer direction.
When the feed pin transports the metal strip 11 in the transport direction, the wall surface on the downstream side of the feed pin in the transport direction abuts against the inner wall surface of the notch, and the metal strip 11 can be pulled in the transport direction. .

Japanese Patent Application Laid-Open No. 6-211394

  In recent years, heat exchangers using multi-hole flat tubes have been developed. FIG. 2 is a plan view of a metal strip 11 in which a plurality of fins for a heat exchanger using the flat tube (hereinafter may be referred to as flat tube fins) and a flat tube fin 30 obtained by dividing the metal strip 11 into individual pieces. This is shown in FIGS.

The flat tube fin 30 has a plurality of cutout portions 34 into which the flat tube is inserted, and a plate-like portion 36 in which a louver 35 is formed between the cutout portion 34 and the cutout portion 34. Is formed.
The notch 34 is formed only from one side in the width direction of the flat tube fin 30. Therefore, the plurality of plate-like portions 36 between the cutout portion 34 and the cutout portion 34 are connected by the connection portion 38 extending along the longitudinal direction.

  Further, the flat tube fins 30 are provided with cut-and-raised portions 37 formed by being cut and raised in order to secure a space between the flat tube fins 30 adjacent in the vertical direction when stacked. . The cut-and-raised part 37 is formed by being cut and raised from below the flat tube fin 30 by a punch and a die (not shown) in the connecting part 38. By forming the cut-and-raised portion 37, a through-hole 39 with the cut-and-raised portion is formed in the connecting portion 38 as a formation mark of the cut and raised portion 37. Hereinafter, the through-hole 39 with the cut-and-raised portion is simply referred to as the through-hole 39 and will be described.

  When the plurality of flat tube fins 30 are stacked in the vertical direction, the upper portion of the cut-and-raised portion 37 of the flat tube fin 30 positioned below abuts the lower surface of the flat tube fin 30 positioned above. That is, the vertical spacing of the flat tube fins 30 when stacked in the vertical direction is determined by the height of the cut-and-raised portion 37.

By the way, a metal strip in the stage before being formed into such a flat tube fin (the state in which the notch 34 is formed but not cut to a predetermined length: hereinafter, a metal strip having a product width) However, the following problems have arisen when trying to transfer them by a feeding device of a conventional heat exchanger fin manufacturing apparatus.
That is, in the above flat tube fin, since one side of the flat tube fin is opened by the cutout portion 34, if the feed pin is moved into the cutout portion 34 and transferred, In addition, the transfer of the metal strip having the product width is uneven, and the transfer accuracy is very poor. In addition to this, there is a concern about the occurrence of a problem that the width of the notch 34 is expanded by the feed pin during transfer (the notch 34 is deformed).

  Further, in the case of a product having a narrow flat tube width, the width of the notch 34 is extremely narrow, so that it is difficult to allow the feed pin to enter the narrow notch 34 itself.

  Accordingly, the present invention has been made to solve the above-mentioned problems, and its object is to provide a flat tube fin that can be reliably transferred, a manufacturing mold for manufacturing a flat tube fin that can be reliably transferred, and a flat tube An object of the present invention is to provide a feeding device for reliably transferring a metal strip of fins.

As a result of intensive studies to solve the above-mentioned problems, the present inventor has come up with the following configuration.
That is, it was formed by cutting and raising a part of the metal thin plate and a notch portion for inserting a flat tube for heat exchange formed from one side to the other side in the width direction of the metal thin plate. A flat tube fin having a cut-and-raised portion and a through-hole that is a formation mark of the cut-and-raised portion, wherein the cut-and-raised portion is formed at a plurality of locations in the transfer direction before the completion of the flat tube fin manufacturing. Any one or more of the plurality of cut-and-raised portions are formed on a standing wall whose standing height in the downstream portion in the transport direction is lower than the standing height in the upstream portion in the transport direction. The flat tube fin is characterized in that the standing wall is a transfer locking portion.
According to the configuration of the flat tube fin according to the present invention, even if the flat tube fin has a narrow cut-out portion using a very thin flat tube, the cut-and-raised portion partly has more than the other cut-and-raised portion. It is possible to reliably and easily transfer the precursor of the flat tube fin precursor by locking the feed pin of the transfer means through which the through-hole is inserted to the upright wall that is erected so as to be low. Become.

  Further, the standing wall is formed in a shape that stands in a direction perpendicular to the transfer direction, or a shape in which the upper end position of the standing wall is located downstream of the lower end position of the standing wall in the transfer direction. It is preferable. According to these structures, since the engagement state of the standing wall and the feed pin of the transfer means is further strengthened, the metal strip that is the precursor of the flat tube fin can be transferred more efficiently.

  In addition, a cutout portion for inserting a flat tube for heat exchange formed from one side in the width direction to the other side, a cut-and-raised portion formed by being cut and raised, and a formation trace of the cut-and-raised portion A manufacturing die for manufacturing a flat tube fin having a through-hole, which is provided in any one of the first mold and the second mold, and the first mold and the second mold that can be freely opened and closed. A burring portion and a punch for drilling the through hole in a metal thin plate to be processed at a tip portion; and a die into which the tip portion of the punch enters, and the punch is attached to the die There is also an invention of a flat tube fin manufacturing mold characterized in that a gap formed between the punch and the die when entering into the flat plate is larger than a plate thickness of the metal thin plate. . According to the present invention, it is possible to manufacture a flat tube fin having an advantageous structure for transfer.

  In addition, it is preferable that the center line position of the tip of the punch in the transfer direction is disposed downstream of the center line position of the die in the transfer direction. According to this structure, the standing wall excellent in the transportability can be formed, and the flat tube fin capable of efficient transport can be manufactured at low cost.

  Also, a cutout portion for inserting a flat tube for heat exchange from one side to the other side in the width direction of the metal thin plate, and a cut-up portion formed by cutting and raising a part of the metal thin plate And forming a flat tube fin having a through hole which is a formation mark of the cut-and-raised portion, the cut-out portion and the cut-and-raised portion are formed in the metal thin plate and then cut into a predetermined length. A transport device for transporting a metal strip in a predetermined direction before the transfer, wherein the metal strip can be placed on an upper surface, and a transfer guide formed with a slit extending in the transport direction of the metal strip And a movable body provided below the transfer guide and movable in the transfer direction of the metal strip by a driving means, and provided so as to be able to enter the through hole of the metal strip from the slit of the transfer guide, Metal strip A feed pin that pulls the metal strip in the transfer direction with the movement of the movable body when the mobile body enters the through hole. There is also an invention as a feeding device for a metal strip, characterized in that a standing wall formed on the downstream side in the direction is pulled in the transport direction by engaging with the feed pin. According to this invention, even if it is a fin for flat tubes where the width dimension of a notch part is very narrow, it can be reliably transferred.

  Moreover, it is preferable that the upper end surface of the said feed pin is formed in the inclined surface which inclines below toward the upstream from the downstream of the said transfer direction. According to this configuration, the time for moving the feed pin from the downstream side to the upstream side in the transfer direction can be shortened, and the transfer amount of the metal strip per unit time can be increased.

  According to the present invention, when transferring a metal strip that is a precursor of a flat tube fin, a configuration is adopted in which the metal strip is transferred by inserting a feed pin into a through-hole portion that has not been conventionally used. Thus, it is possible to provide a flat tube fin (metal strip) that can be reliably transferred regardless of the width of the notch. Moreover, the manufacturing die which manufactures such a flat tube fin, and the feeding apparatus for reliably transferring the metal strip | belt body which is the precursor of the flat tube fin can be provided.

It is a top view of the metal strip and flat tube fin concerning this embodiment. It is a whole block diagram of the manufacturing apparatus of the fin for flat tubes concerning this embodiment. It is principal part sectional drawing of the manufacturing die of the flat tube fin concerning this embodiment. It is an enlarged view of the through-hole part formed in the manufacturing metal mold | die shown in FIG. It is a principal part top view which shows the state which mounted the metal strip in the feeder. It is principal part sectional drawing explaining operation | movement of the movement unit of the feeder on the ZZ line | wire in FIG. It is the top view and side view which show operation | movement of a holding | maintenance apparatus and a stack apparatus. It is the top view and side view which show operation | movement of a holding | maintenance apparatus and a stack apparatus. It is the top view and side view which show operation | movement of a holding | maintenance apparatus and a stack apparatus. It is explanatory drawing which shows the change state of the raise of a stack apparatus. It is explanatory drawing explaining the whole structure of the manufacturing apparatus of the fin for heat exchangers in a prior art. It is a top view which shows the metal strip in a prior art, and the fin for flat tubes.

First, in a manufacturing process for manufacturing a flat tube fin, a metal strip obtained by forming a cutout portion in a thin metal plate, and the flat tube fin after dividing it into individual pieces are shown in FIG. Shown in (B). The metal strip 49 shown in FIG. 1 is manufactured using the flat tube fin manufacturing apparatus 200 shown in FIG. 2 and the flat tube fin manufacturing mold 46 shown in FIG.
Specifically, the metal thin plate 41 is unwound from the uncoiler 40, supplied to the press device 48 via the loop controller 42 and the NC feeder 44, and pressed by the flat tube fin manufacturing die 46. A metal strip 49 as shown in FIG. 1A is formed. The NC feeder 44 is composed of two rollers that are in contact with the upper surface and the lower surface of the thin plate 41. When the two rollers are rotationally driven, the metal thin plate 41 is sandwiched between each other and the metal thin plate 41 is intermittently fed. . In the metal thin plate 41 supplied in this way, the flutter of intermittent feeding is suppressed by the loop controller 42.

The flat tube fin manufacturing mold 46 according to the present embodiment (hereinafter, simply referred to as the manufacturing mold 46) is formed from one side to the other side in the width direction of the metal thin plate, and is used for heat exchange. A cut-out portion 34 into which the flat tube is inserted, a cut-and-raised portion 37 formed by cutting and raising a part of a metal thin plate, and a through-hole 39 that is a formation mark obtained by cutting and raising the cut-and-raised portion 37. To form.
Such a manufacturing mold 46 includes an upper mold 46A that is a first mold and a lower mold 46B that is a second mold, and an upper mold 46A that are provided so as to be freely opened and closed by moving at least one of them in contact with and away from the other. A burring portion is provided on at least one of the lower mold 46B and for forming a through hole 39 in a metal thin plate to be processed at the tip.

Further, the manufacturing mold 46 has a side surface facing the downstream side in the transfer direction of the metal strip 49 in the direction of arrow A in FIG. 3 with respect to the parting surface 46C (relative to the transfer direction of the metal strip 49). The punch 47 formed on the flat surface 47A having a required angle and the die 47B into which the tip of the punch 47 enters are appropriately disposed on the upper die 46A or the lower die 46B.
In the manufacturing mold 46 in this embodiment, the gap 47C formed when the tip of the punch 47 enters the die 47B has a width that is wider than the plate thickness of the metal strip 49 (metal thin plate 41). It is formed as follows.

As shown in FIG. 3A, the side face of the punch 47 provided on the lower mold 46B of the production mold 46 facing the downstream side in the transfer direction of the metal strip 49 is used as the parting surface 46C of the production mold 46. On the other hand, if the flat surface 47A that stands vertically is formed, the cut and raised portion 37 (standing wall 37B) on the downstream side in the transfer direction of the metal strip 49 is (metal) with respect to the parting surface 46C of the manufacturing mold 46. It stands upright (with respect to the transfer direction of the band 49) (see FIG. 4A).
Further, if the punch 47 shape as shown in FIG. 3B is adopted, the cut-and-raised portion 37 (standing wall 37B) on the downstream side in the transfer direction of the metal strip 49 is raised at the upper end position of the standing wall 37B. It is formed in the curved surface shape located in the downstream of a transfer direction rather than the lower end part position of the wall 37B (refer FIG. 4 (B)).
In any of the manufacturing dies 46, the tip center line CL1 of the punch 47 in the transfer direction is arranged so that the position of the center line CL1 of the die 47B in the transfer direction is downstream of the position of the center line CL2 of the die 47B. ing. By adopting such a positional relationship between the punch 47 and the die 47B, the standing wall 37B having a shape as shown in FIGS. 3 and 4 can be easily manufactured.

4 is an enlarged view of a through-hole portion formed in the manufacturing mold shown in FIG. More specifically, FIG. 4 (A) is a plan view and a front view of the through hole portion formed by the manufacturing mold 46 shown in FIG. 3 (A), and FIG. 4 (B) is FIG. 3 (B). It is the top view and front view of a through-hole part which were formed with the manufacturing metal mold | die 46 shown in FIG.
The cut-and-raised portion 37 according to the present embodiment includes a tab 37 </ b> A that defines a stacking interval when the flat tube fins 30 after the metal strips 49 are separated into pieces are stacked in the plate thickness direction, and the metal strips 49. It is comprised by the standing wall 37B for engaging with the feed pin 55, when making it transfer with the feeder 50 mentioned later. In this embodiment, the height dimension H1 of the standing wall 37B is formed to be lower than the standing height dimension H2 of the tab 37A. If the standing wall 37B is below the standing height dimension H2 of the tab 37A and the feed pin 55 can be inserted into the through hole 39, the standing height dimension H1 and the standing shape of the standing wall 37B should be adjusted as appropriate. Can do.

As for the flat tube fin 30 obtained by cutting the metal strip 49 into a predetermined length, the basic configuration is disclosed in the description of the prior art, so the configuration of the flat tube fin 30 and the metal strip 49 is the same. About the common part, the detailed description here is abbreviate | omitted by using the same code | symbol. The metal strip 49 shown in FIG. 1 is formed by arranging four products (flat tube fins 30) side by side in the width direction orthogonal to the transfer direction of the metal strip 49.
The metal strip 49 has a plurality of notches 34 into which a flat tube is inserted in the width direction with respect to a metal thin plate as a material, and is formed at a plurality of locations at predetermined intervals along the transfer direction of the metal strip 49. Yes. Between the notch 34 and the notch 34, the plate-like part 36 in which the louver 35 was formed is formed. Further, on both end sides in the width direction of the louver 35, a cut-and-raised portion 37 formed by cutting and raising a part of the plate-like portion 36 and a through hole 39 that is a formation trace of the cut-and-raised portion 37 are formed. .

The cutout 34 is formed from one side to the other side only from one side in the width direction of the metal strip 49. Therefore, the plurality of plate-like portions 36 between the cutout portion 34 and the cutout portion 34 are configured to be connected by the connection portion 38 extending along the longitudinal direction.
One of the two raised portions 37, 37 for the one louver 35 is formed at the position of the connecting portion 38.

The metal strip 49 shown in FIG. 1 includes two sets of two products (flat tube fins 30) arranged so as to face each other so that the opening sides of the notches 34 are adjacent to each other. . That is, a set in which the opening sides of the cutout portions 34 of the two products are arranged to face each other is arranged so that the connecting portions 38 are adjacent to each other.
Thus, by arranging the four products in an array having the center line in the transfer direction as the target axis, the left and right load balance of the manufacturing mold 46 is improved.

FIG. 5 is a plan view of an essential part showing a state in which a metal strip is placed on the feeder. FIG. 6 is a cross-sectional view of the main part for explaining the operation of the moving unit 54 of the feeding device 50 on the ZZ line in FIG.
The feeding device 50 according to the present embodiment includes a transfer guide 52 that guides the metal strip 49 in the transfer direction, and a moving unit 54 that is disposed below the transfer guide 52 and is capable of reciprocating in the horizontal direction. And a feed pin 55 held by a pin holding portion 56 attached to the unit 54. The pin holding portion 56 holds the feed pin 55 in a state of being biased by biasing means 56A represented by a coil spring or the like.

  On the upper surface of the transfer guide 52, a guide groove 52A having a concave shape having the same width as that of the metal strip 49 is formed. If the metal strip 49 is accommodated in the guide groove 52A, the metal strip 49 is constrained at both side edges in the width direction. Thereby, the metal strip 49 can be transferred along the transfer direction. In addition, the transfer guide 52 penetrates in the plate thickness direction of the transfer guide 52 and extends along the transfer direction of the metal strip 49 in accordance with the position of the through hole 39 formed in the metal strip 49. A slit 52B is formed. As shown in FIG. 6, a feed pin 55 provided in the moving unit 54 is inserted into the slit 52 </ b> B from the lower side of the transfer guide 52.

  The feed pin 55 has a height penetrating the through hole 39 of the metal strip 49 accommodated in the guide groove 52A by the urging force of the urging means 56A incorporated in the pin holding portion 56 attached to the upper surface of the moving unit 54. Projected to the position. By applying a force against the urging force of the urging means 56 </ b> A to the feed pin 55, the feed pin 55 can be shortened to a height position below the placement surface of the metal strip 49.

  Further, the downstream edge 55A in the transport direction of the metal strip 49 of the feed pin 55 is formed in a shape following the standing shape of the upright wall 37B. In the feed pin 55 according to the present embodiment, the downstream edge 55A in the transport direction of the metal strip 49 is erected in a direction perpendicular to the transport direction. With such a configuration of the feed pin 55, when the feed pin 55 is inserted through the through hole 39 of the metal strip 49, the upright wall 37 </ b> B and the feed pin 55 are erected perpendicular to the transfer direction. The metal strips 49 can be locked with each other in a state of being in close contact with each other, and the metal strip 49 can be reliably pulled and transferred, which contributes to an improvement in production efficiency.

The operation of the moving unit 54 will be described in detail.
The moving unit 54 is disposed below the transfer guide 52 so as to be able to reciprocate in the transfer direction of the metal strip 49 (the extending direction of the slit 52B). When the moving unit 54 moves so that the planar position of the feed pin 55 provided in the moving unit 54 becomes the planar position of the through hole 39 of the metal strip 49 placed on the upper surface of the transfer guide 52 at the transfer start position. The feed pin 55 is extended by the urging force of the urging means 56 </ b> A to enter the through hole 39. After the feed pin 55 passes through the through hole 39, the moving unit 54 moves horizontally in the transfer direction of the metal strip 49 (the direction of arrow 1 in FIG. 6) by a moving means (not shown). At this time, the feed pin 55 inserted through the through hole 39 is engaged with the upright portion 37B, whereby the metal strip 49 is pulled in the transfer direction.

  When the metal strip 49 is transferred to the transfer completion position, a moving unit (not shown) moves the movement unit 54 in a direction to return the movement unit 54 to the transfer start position as indicated by the tip of the arrow 2 in FIG. At this time, when the feed pin 55 comes into contact with the tab 37A, a downward force against the urging force of the feed pin 55 acts, and the feed pin 55 returns to the transfer start position together with the moving unit 54 while shortening. When the moving unit 54 returns to the transfer start position in this way, the feed pin 55 is extended again by the biasing force of the biasing means 56A, and the feed pin 55 is inserted into the through hole 39.

As shown in FIG. 6, the feed pin 55 in the present embodiment has an upper end surface that is inclined downward from the downstream side in the transfer direction of the metal strip 49 toward the upstream side (downstream of the metal strip 49 in the transfer direction). (Inclined gradually from the side toward the upstream side). By combining the movement operation of the moving unit 54, the moving unit 54 is returned to the transfer start position while the insertion portion of the feed pin 55 into the through hole 39 is pulled out from the through hole 39 (in FIG. 6). The state shown at the tip of the arrow 3) can be shortened, and the tact time can be shortened.
The feeding device 50 repeatedly feeds the metal strip 49 from the transfer start position to the transfer completion position by repeatedly executing the above operations (arrows 1, 2, 3, 1,... In FIG. 6). do.

An inter-row slit device 58 is provided on the downstream side of the feeding device 50 (downstream side in the transfer direction of the metal strip 49) (see FIG. 2). The inter-row slit device 58 includes an upper blade 58 </ b> A disposed on the upper surface side of the metal strip 49 and a lower blade 58 </ b> B disposed on the lower surface side of the metal strip 49. The inter-row slit device 58 may be provided so as to operate using the vertical movement operation of the press device 48.
The upper blade 58A and the lower blade 58B are formed long in the conveying direction of the metal strip 49, and the intermittently fed metal strip 49 is cut by the meshed upper blade 58A and lower blade 58B, A strip-shaped product that is long in the transfer direction (hereinafter, may be referred to as a metal strip having a product width) is manufactured.

The metal strips 49 having a plurality of product widths cut to the product width by the inter-row slit device 58 are fed into a cut-off device 60 that is provided separately.
Before being fed into the cut-off device 60, the metal strips 49 having a plurality of product widths are arranged so as to leave a predetermined interval between the metal strips 49 having adjacent product widths. In addition, before being fed into the cut-off device 60, the metal strips 49 having a plurality of product widths are temporarily bent to have a length longer than a single feed length by the cut-off device 60. Thus, the buffer part B is formed.

  In the cut-off device 60, a feeding device 62 that intermittently conveys the metal strip 49 of each product width in the conveyance direction is provided. The structure of the feeding device 62 is configured such that one feeding length can be made longer than the structure of the feeding device 50 provided on the downstream side of the pressing device 48. In the present embodiment, the configuration and operation control of the feeding device 62 are the same as the above-described configuration and operation control of the feeding device 50, and thus detailed description thereof is omitted here.

A cutting device 66 is provided on the downstream side of the feeding device 62 of the cutoff device 60 (downstream side in the transfer direction of the metal strip 49 having the product width).
The cutting device 66 forms the flat tube fins 30 by cutting the metal strips 49 of each product width into a predetermined length. The cutting device 66 has an upper blade 68 disposed on the upper surface side of the metal strip 49 of each product width and a lower blade 69 disposed on the lower surface side of the metal strip 49 of each product width.
When the upper blade 68 and the lower blade 69 are closed, the metal strip 49 of each product width is cut into a predetermined length along the transfer direction, and the flat tube fin 30 is manufactured.

The configurations and operations of the holding device 70 and the stack device 80 disposed on the downstream side of the cutoff device 60 are shown in FIGS. 7 to 9, plan views are shown on the left side of (A) and (B), and side surfaces from the arrow X direction (cut-off device 60 side) in the plan view are shown on the right side of (A) and (B). The figure is shown.
On the downstream side of the cut-off device 60, a metal strip 49 having a product width that has passed through the metal mold 46 and the inter-row slit device 58 is held and the transfer direction of the metal strip 49 having a product width is guided to be used for a flat tube. A holding device 70 that maintains the holding state after being formed on the fin 30 and a stack device 80 that stacks the flat tube fins 30 in the thickness direction are provided.

As shown in FIG. 7, the holding device 70 includes a pair of holding bodies 71, 71 having a U-shaped cross section extending along the transfer direction of the metal strip 49 having the product width, and the width of the metal strip 49 having the product width. A fluid cylinder 72 which is contact / separation moving means for contacting / separating the pair of holding bodies 71, 71 to / from a position where the metal band 49 of the product width can be held from the lateral position of both end edges in the direction. Yes.
The stack device 80 includes a base portion 82 in which a plurality of stack pins 81 are erected, and a metal strip 49 and a flat tube having a product width in which the base portion 82 is held by the holding body 71 from a position below the holding body 71. Elevating means that moves up and down between the fins 30 is provided. In the present embodiment, the lifting / lowering means is constituted by the servo motor 84 and the ball screw 85 connected to the output shaft of the servo motor 84.

Both the fluid cylinder 72 and the servo motor 84 perform an expansion / contraction operation in synchronism with the feeding operation of the metal strip 49 having the product width by the feeding device 62.
Specifically, as shown in FIG. 7A, the metal strip 49 having the product width passes (sends out) the position of the upper blade 68 and the lower blade 69 in the cutting device 66 of the cutoff device 60, as shown in FIG. The fluid cylinder 72 extends, and the widthwise both side edges and the bottom surface of the metal strip 49 of the product width are set at positions where they can be held by the openings of the U-shaped portions of the pair of holding bodies 71. When the pair of holding bodies 71 are set so as to hold both side edges and the bottom surface of the product-width metal strip 49, as shown in FIG. Is sent out. The metal strip 49 having the product width is guided in the transfer direction along the guide space 74 formed by the pair of holding bodies 71 arranged with the openings facing each other.

  As shown in FIG. 7B, when the metal strip 49 having the product width is transferred to the guide space 74 of the pair of holding bodies 71 by a predetermined length by the feeding device 62, the feeding device 62 temporarily stops. Thereafter, as shown in FIG. 8A, the servo motor 84 is driven to rotate the ball screw 85, and the base portion 82 on which the stack pins 81 are erected is brought close to the pair of holding bodies 71 from below. Thus, the stack pin 81 is inserted through the notch 34 of the metal strip 49 having the product width. Since the transfer amount (feed amount) of the metal strip 49 having the product width is determined in advance, the base portion 82 aligns the position of the stack pin 81 with the position of the notch 34 of the metal strip 49 having the product width. I can keep it.

  When the stack pin 81 is inserted into the cutout portion 34 of the product-width metal strip 49, the cutting device 66 of the cut-off device 60 cuts the product-width metal strip 49 at a predetermined position, and the product-width metal strip. 49 is separated into flat tube fins 30 (FIG. 8B). Thus, when the metal strip 49 having the product width is cut, the stack pin 81 is inserted into the notch 34 and the metal strip 49 having the product width is held in a positioned state. A cutting process can be performed. That is, the flat tube fin 30 with high dimensional accuracy can be obtained.

  The flat tube fins 30 singulated by the cutting device 66 are held in the guide space 74 in a state where the stack pins 81 are inserted into the notches 34 as before the singulation. When the metal strip 49 having a product width is separated into the flat tube fins 30 by the cutting device 66, the fluid cylinder 72 is shortened as shown in FIG. The fins 30 are separated from the lateral positions of both side edges in the width direction. When the pair of holding bodies 71 are separated from the flat tube fins 30, the flat tube fins 30 are stacked on the base portion 82 along the stack pins 81 inserted through the notches 34.

At this time, since the distance between the upper surface of the base portion 82 and the holding surface of the flat tube fin 30 of the holding body 71 is very small, the flat tube fin 30 can be stacked on the base portion 82 in an orderly manner.
Further, the flat tube fins 30 adjacent to each other in the vertical direction can be maintained at a constant interval by the standing height of the tab 37A formed on the lower flat tube fin 30. Since the standing height of the standing wall 37B is equal to or less than the standing height of the tab 37A, it does not affect the vertical stacking interval of the flat tube fins 30 at all.

  After the flat tube fins 30 are laminated on the upper surface of the base portion 82 in the thickness direction, the servo motor 84 is driven to rotate the ball screw 85 as shown in FIG. The holding body 71 is lowered to a lower position. At the same time or after the base portion 82 is lowered, the fluid cylinder 72 extends to bring the pair of holding bodies 71 closer to each other, and is sent out from the feeding device 62 and protrudes from the downstream side in the transfer direction of the cutoff device 60. A guide space 74 is formed to guide the transfer direction of the metal strip 49 having the product width (that protrudes). After the guide space 74 is formed again, the feeding device 62 resumes operation and feeds the metal strip 49 having the product width into the guide space 74. By repeating the above operation, the flat tube fins 30 obtained by dividing the metal strip 49 having the product width into pieces can be regularly stacked at predetermined intervals.

A series of operations of the press device 48, the feeding device 50, the inter-row slit device 58, the cutoff device 60, the holding device 70, and the stack device 80 are controlled by the control unit 100. As such a control unit 100, a computer having a central processing unit (CPU) that stores a control program in a storage unit and performs an operation based on the control program can be used.
As shown in FIG. 10, the control unit 100 includes a base unit 82 (stacked) as the number of flat tube fins 30 stacked on the base unit 82 increases (from the upper side to the lower side in the figure). The drive of the servo motor 84 is controlled so that the ascending stroke (S1, Sm, Sn) of the apparatus is gradually reduced. It should be noted that the range in which the holding body 71 moves toward and away from the metal strip 49 having the product width is always constant.

When the number of flat tube fins 30 stacked on the base portion 82 reaches a predetermined number, the flat tube fins 30 stacked on the base portion 82 are transferred from the base portion 82 to a delivery device (not shown). Even after being delivered to the delivery device, the flat tube fins 30 can maintain a constant stacking interval by the tabs 37A, and handling of the flat tube fins 30 such as the removal processing of the flat tube fins 30 is easy. It is.
When the flat tube fins 30 are delivered from the base portion 82 to the delivery device, the drive amount of the servo motor 84 is reset so that the rising stroke of the base portion 82 becomes the initial value S1.

  According to the configuration of the holding device 70 according to the present embodiment, the metal strip 49 having the product width before the cut-off process is transferred while sliding on the inner bottom surface of the guide space 74. Compared with the air adsorption method, the frictional force during transfer is greatly reduced. Thus, unlike the prior art, the metal strip 49 having a product width is not buckled by the frictional force due to air adsorption and the pushing force applied in the transfer direction during the transfer, and the product yield can be improved.

  Further, since the distance (height difference) from the holding position of the flat tube fin 30 by the guide space 74 to the upper surface position of the base portion 82 on which the stack pin 81 is erected is extremely small, the flatness with different weight balance in the short direction is different. The tube fins 30 can be stacked on the base portion 82 in an orderly manner. Accordingly, when the flat tube fins 30 are delivered from the base portion 82 to a delivery device (not shown), the correction process of the laminated state of the flat tube fins 30 is not required, so the tact time is shortened and the flat tube fins 30 are removed. The manufacturing cost can be reduced.

  While the present invention has been described above with reference to a preferred embodiment, 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. . For example, the metal strip 49 (flat tube fin 30) is not limited to the configuration shown in FIG. 1, and the louver 35 and the cut-and-raised portions 37 may have other configurations. Can be adopted.

About the structure of the standing wall 37B which is a part of the cut-and-raised part 37, the standing wall 37B is erected only on the downstream side in the transfer direction in one cut-and-raised part 37 among the plurality of raised parts 37, and the upstream side Although the embodiment in which the tab 37A is formed is described in the above, it is not limited to this embodiment. For example, in the cut-and-raised portion 37 of the plurality of cut-and-raised portions 37, 37,..., The tab 37A is not provided, and the standing walls 37B are formed on both the upstream side and the downstream side in the transfer direction. Also good. In this case, the cut-and-raised portion 37 composed of only the standing wall 37 </ b> B is not higher than the standing height of the tab 37 </ b> A of the other cut-and-raised portion 37.
Even if the cut-and-raised portion 37 made of only the standing wall 37 </ b> B is provided in a part of the large number of cut-and-raised portions 37, there is no adverse effect when the flat tube fins 30 are stacked.

  And the standing wall 37B in this embodiment is about the form standing upright with respect to the transfer direction of the metal strip 49, and about the form standing up in the state where the standing wall 37B curved to the downstream side of the transfer direction. Although described, the upright wall 37 </ b> B only needs to be able to move the metal strip 49 by the engagement of the feed pin 55. Therefore, the standing wall 37B is not perpendicular to the transfer direction, and the upper end side position of the standing wall 37B is located on the downstream side in the transfer direction with respect to the cut-and-raised position of the standing wall 37B (metal strip 49 May be erected (in the form of a flat surface at a predetermined angle with respect to the transfer direction). By adopting the standing wall 37B having such a configuration, the traction force of the metal strip 49 by the feed pin 55 can be increased, and the metal strip 49 can be reliably transferred.

Further, the operation patterns of the moving means of the moving unit 54 of the feeding device 50 and the expansion / contraction means 56 of the feeding pin 55 are not limited to the above-described operation patterns. After the metal strip 49 is transferred to the transfer destination position, the operation of returning the moving means to the transfer start position and the operation of shortening the expansion / contraction means are executed simultaneously, but the expansion / contraction means 56 is shortened and sent from the through hole 39. After pulling out the pin 55, an operation of driving the moving unit and returning the moving unit 54 to the transfer start position may be employed.
Furthermore, the embodiments of the cut-off device 60, the holding device 70, and the stack device 80 can also employ a known configuration different from the configurations of the embodiments described above.

10 thin plates, 11 metal strips, 12 uncoilers, 14 pinch rolls, 16 oil applicators, 18 press devices, 20 mold devices, 22 upper die sets, 24 lower die sets, 26 cutters, 27 pins, 28 stackers, 30 flat tube fins, 34 cutouts, 35 louvers, 36 plate-like parts, 37 cut-and-raised parts, 37A tabs, 37B standing walls, 38 connecting parts, 39 through holes, 40 uncoilers, 41 metal thin plates, 42 loop controllers , 44NC feeder, 46 manufacturing mold, 46A upper mold, 46B lower mold, 46C parting surface, 47 punch, 47A flat surface, 47B die, 47B press machine, 47C gap, 49 metal strip, 50 feeder, 52 transport Guide, 52A guide groove, 52B slit, 54 moving unit, 55 feed pin, 55A downstream edge, 55B slope , 56 feed pin holding means, 56A biasing means, 58 row slit device, 58A upper blade, 58B lower blade, 60 cutoff device, 62 feed device, 66 cutting device, 68 upper blade, 69 lower blade, 70 holding device , 71 holder, 72 fluid cylinder, 74 guide space, 80 stack device, 81 stack pin, 82 base portion, 84 servo motor, 85 ball screw, 100 control unit, 200 manufacturing device

Claims (7)

A notch for inserting a flat tube for heat exchange, formed from one side in the width direction of the thin metal plate to the other side;
A flat tube fin having a cut-and-raised portion formed by cutting and raising a part of the metal thin plate, and a through hole that is a formation mark of the cut-and-raised portion,
The cut and raised portions are formed at a plurality of locations,
In the transfer direction before the completion of flat tube fin manufacturing,
In any one or more of the plurality of cut-and-raised parts, the standing height in the downstream part in the transfer direction is formed on a standing wall lower than the standing height in the upstream part in the transfer direction, The flat tube fin, wherein the upright wall is a transfer locking portion.   The flat tube fin according to claim 1, wherein the standing wall is formed in a shape that rises in a direction perpendicular to the transfer direction.   2. The flat tube according to claim 1, wherein the standing wall is formed in a shape such that an upper end position of the standing wall is located downstream of the lower end position of the standing wall in the transfer direction. fin. It is a notch part for inserting a flat tube for heat exchange formed from one side in the width direction to the other side, a cut and raised part formed by being cut and raised, and formation marks of the cut and raised part. A production mold for producing a flat tube fin having a through hole,
A first mold and a second mold that are freely opened and closed;
A burring portion and a punch, which are provided in either the first mold or the second mold, and for drilling the through hole in a metal thin plate to be processed at the tip;
A die into which the tip of the punch enters,
A flat tube fin manufacturing metal, wherein a gap formed between the punch and the die when the punch enters the die is larger than a plate thickness of the metal thin plate. Type.   The center line position of the front-end | tip part of the said punch in the said transfer direction is arrange | positioned so that it may be located in the downstream of the said transfer direction rather than the centerline position of the said die in the said transfer direction. Manufacturing mold of flat tube fin as described. From one side to the other side in the width direction of the metal thin plate, a cutout portion for inserting a flat tube for heat exchange, a cut and raised portion formed by cutting and raising a part of the metal thin plate, When forming the flat tube fin having a through hole which is a formation mark of the cut-and-raised portion, before forming the cut-out portion and the cut-and-raised portion on the metal thin plate before cutting to a predetermined length A feeding device for transporting the metal strip in the predetermined direction in a predetermined direction,
The metal strip can be placed on the upper surface, and is provided with a transfer guide formed with a slit extending in the transfer direction of the metal strip, and the transfer of the metal strip by a driving means provided below the transfer guide. A movable body that is movable in a direction, and is provided so as to be able to enter the through hole of the metal strip from the slit of the transfer guide, and when entering the through hole of the metal strip, A feed pin that pulls the metal strip in the transfer direction,
The metal strip is pulled in the transfer direction by an upright wall formed on the downstream side in the transfer direction of the cut and raised portion being engaged with the feed pin. Feeder. The upper end surface of the feed pin is
The metal strip feeding device according to claim 6, wherein the feeding device is formed on an inclined surface inclined downward from the downstream side to the upstream side in the transfer direction.

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