JP2013128977A - Apparatus for manufacturing flattened tube fin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing apparatus that can reliably manufacture a flattened tube fin with no through-hole.SOLUTION: The apparatus for manufacturing flattened tube fins 30 in which cutaway portions 34 into which flattened tubes 32 for heat exchangers are inserted are formed, includes: a press device 48 having a mold device 46 for forming the cutaway portions 34 in an unmachined metal thin plate 41 to produce a metal strip 49; an inter-row slit device 52 for cutting the metal strip 49 by a predetermined width to form a plurality of metal strips 49 of a product width; a cutoff device 60 for cutting the metal strips 49 of the product width formed by the inter-row slit device 52 into a predetermined length; a holding device 70 for holding the metal strips 49 of the product width that protrude from a downstream side in the conveying direction of the cutoff device 60 and guiding the metal strips in a delivery direction, and maintaining the holding state even after formed into the flattened tube fins 30; and a stacker device 80 for stacking the flattened tube fins 30.

Description

  The present invention relates to a fin manufacturing apparatus for a heat exchanger using a flat tube.

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. By this mold apparatus 20, a plurality of collared through holes (not shown) in which a collar having a predetermined height is formed around the through holes are formed at predetermined intervals in a predetermined direction.
Hereinafter, a metal thin plate in which through holes and the like are 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 heat exchanger fins manufactured by inserting the pins 27 into the through holes are stacked.

JP-A-5-192728

A conventional heat exchanger fin has a plurality of through holes into which a heat exchange tube is inserted into a metal strip.
Currently, however, heat exchangers using multi-hole flat tubes have been developed. FIGS. 17A and 17B show heat exchanger fins using the flat tubes (hereinafter sometimes referred to as flat tube fins).

The flat tube fin 30 has a plurality of cutout portions 34 into which the flat tube 32 is inserted, and a plate-like portion in which a louver 35 is formed between the cutout portion 34 and the cutout portion 34. 36 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.

By the way, when such a flat tube fin is manufactured by a conventional heat exchanger fin manufacturing apparatus, the following problems have occurred.
A conventional heat exchanger fin has a plurality of through holes, and the manufactured fins are stacked on a stacker 28 on which pins 27 are disposed so as to penetrate the through holes. However, in the flat tube fin described above, since a through hole is not formed, pins cannot be inserted and aligned when stacked. Further, since the flat tube fins do not have a symmetrical shape in the width direction, the weight balance in the width direction is biased, and there is a possibility that stacking will not be successful even if they are simply stacked.
Furthermore, the flat tube fin is obtained by cutting off the metal strip of the product width to a predetermined length, but the metal strip of the product width is not cut until the metal strip of the product width is cut off. Air is adsorbed to position and hold. For this reason, the frictional force between the metal strip of the product width and the air adsorbing portion becomes large, and when the metal strip of the product width is sent out from the cut-off device, the metal strip of the product width at the air adsorbing portion. There may be a problem that the body buckles.
Therefore, when manufacturing flat tube fins typified by flat tube fins, in addition to how they are stacked and stored, how to send a metal strip of product width from the cutoff device There was a problem in that.

  Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a flat tube fin manufacturing apparatus that can reliably manufacture flat tube fins in which no through holes are formed. .

The flat tube fin manufacturing apparatus according to the present invention manufactures a flat tube fin in which a notch for inserting a flat tube for a heat exchanger is formed from one side in the width direction to the other side. In a manufacturing apparatus, a pressing device provided with a mold device that forms a notch portion in a raw metal thin plate to form a metal strip, and a metal strip formed with the notch portion has a predetermined width. The inter-column slit device for forming a product-width metal strip formed by aligning a plurality of products in the width direction, a cut-off device for cutting the product-width metal strip into a predetermined length, and the inter-row slit Each of the metal strips having a plurality of product widths formed by the apparatus, sent out in the conveyance direction, passed through the cutoff device and protruded from the downstream side in the conveyance direction of the cutoff device, and the product A holding device that guides the transport direction of the metal strip and is maintained in a holding state even after being cut into a predetermined dimension by the cut-off device and formed as a flat tube fin, and to a predetermined length by the cut-off device. A stacking device for laminating the cut flat tube fins, and the holding device includes a lateral position of a product-width metal strip fed from the inter-row slit device and a product-width metal strip. The stack device has a pair of holding members provided so as to be movable toward and away from each other, and the stack device has a metal strip having a product width held by the holding device by the cut-off device to a predetermined length. In order to stack flat tube fins that are cut into two, stack pins that are inserted through the notches are aligned in the length direction of the flat tube fins. With the is characterized in that it is vertically movably disposed relative to the holding device from the lower side of the holding device.
By adopting this configuration, the product-width metal strip fed from the cut-off device to the downstream side in the transport direction slides on the holding portion without being adsorbed by air. The friction between the metal strip and the metal strip of the product width is reduced, and the metal strip of the product width does not buckle when the metal strip of the product width is transferred. Moreover, in order to laminate | stack the flat tube fin obtained by cutting off the metal strip of a product width, the stack pin penetrated to a notch part can be used. Since the stack pin is inserted into the cutout portion of the metal strip by moving toward and away from the holding device, the height at which the flat tube fin falls from the holding device can be reduced as much as possible. As a result, flat tube fins can be stably stacked on the stack pins even if the flat tube fins have no through-holes for inserting pins like the flat tube fins and the weight balance between the left and right is biased. Thus, the flat tube fin can be manufactured easily and reliably.

Further, the stack device may operate such that the amount of rise of the stack pin with respect to the holding device gradually decreases as the number of flat tube fins inserted into the stack pin increases. Good.
According to this configuration, it is possible to prevent the flat tube fins already stacked on the stack pins from colliding with the holding body, and avoid a decrease in yield due to breakage of the flat tube fins.

Further, the stack pins are inserted in order from a notch portion on the cut-off device side of the metal strip having the product width toward a notch portion on the downstream side in the transfer direction of the metal strip having the product width. It is good.
Further, the upper end height position of the stack pin may be formed so as to gradually become lower as the distance from the cut-off device side increases.
According to these configurations, the stack pin is inserted through the cut-out portion on the cut-off device side where the positional deviation of the metal strip having the product width sent out from the cut-off device is small. In other words, by inserting the stack pin into the cut-out part on the cut-off device side, it is possible to correct the position of the leading end part in the transfer direction of the metal strip of the product width, and to reliably stack all the cut-out parts. A pin can be inserted.

The stack device may further include a restriction pin for restricting a side surface position of the metal strip having the product width.
The holding body may be provided with a regulation pin avoiding portion for preventing interference with the regulation pin rising toward the holding body.
According to these configurations, when the flat tube fins are stacked on the stack pin, the stack pin can be inserted in a direction orthogonal to the notch. As a result, the flat tube fins can be neatly stacked on the stack pins, eliminating the need to correct the flat state of the flat tube fins during delivery of the flat tube fins and improving the production efficiency of the flat tube fins. be able to.

Further, the raising / lowering operation of the restriction pin may be synchronized with the raising / lowering operation of the stack pin.
According to this, it is possible to more reliably insert the stack pin in the direction orthogonal to the notch.

Further, the holding body may be formed in a U-shaped cross section.
According to this configuration, when transferring the metal strip of product width from the inter-slit slit device, it is not necessary to perform air adsorption, so the frictional force between the holding body and the metal strip of product width is greatly increased. This reduces the width of the product-width metal strip and prevents the product-width metal strip from buckling, thereby improving the product yield.

  ADVANTAGE OF THE INVENTION According to this invention, manufacture of the flat tube fin which has a notch part can be performed reliably.

It is a side view which shows the schematic whole structure of the manufacturing apparatus of the fin for flat tubes which concerns on this invention. It is a top view of the metal strip processed with the metallic mold apparatus of 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 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 of the stack apparatus which laminates | stacks and stores the manufactured flat tube fin. It is a side view which shows the change state of the raise amount of a base part. It is a principal part side view which shows the other embodiment of a stack apparatus. It is a principal part side view which shows the other embodiment of a stack apparatus. It is a principal part top view which shows the other embodiment example of a stack apparatus. It is a principal part side view which shows the other embodiment of a feeder. It is a principal part side view which shows the modification of a holding body. It is a side view which shows the general whole structure of the manufacturing apparatus of the conventional fin for heat exchangers. It is a top view of the fin for flat tubes.

FIG. 1 shows the overall configuration of a flat tube fin manufacturing apparatus 200 according to the present embodiment.
An unprocessed metal thin plate 41 such as aluminum is wound around an uncoiler 40 in a coil shape. The thin plate 41 pulled out from the uncoiler 40 is inserted into the loop controller 42, and fluttering of the thin plate 41 that is intermittently fed is suppressed by the loop controller 42.

An NC feeder 44 is provided on the downstream side of the loop controller 42. The NC feeder 44 is composed of two rollers that are in contact with the upper surface and the lower surface of the thin plate 41. When the two rollers are driven to rotate, the thin plate 41 is sandwiched between each other to intermittently feed the thin plate 41.
On the downstream side of the NC feeder 44, a press device 48 in which a mold device 46 is disposed is provided. In the pressing device 48, the thin plate 41 is formed into a metal strip 49 having a predetermined shape by the mold device 46.

A metal strip 49 formed in the press device 48 is shown in FIG. The metal strip 49 shown in FIG. 2 is formed by arranging four products side by side in the product width direction orthogonal to the arrow A that is the transport direction.
As for a specific product obtained from the metal strip 49, as shown in FIG. 17, the notch 34 into which the flat tube 32 is inserted is formed at a plurality of locations, and the notch 34 and the notch A plate-like portion 36 in which a louver 35 is formed is formed. Moreover, the opening part 37 formed by cutting and raising a metal thin plate is formed in the both ends of the width direction of the louver 35. Of the two openings 37, 37 for one louver 35, the opening 37 on one side is formed on the tip side of the plate-like part 36.

The notch 34 is formed only from one side in the width direction of the flat tube fin 30. Accordingly, the plurality of plate-like portions 36 between the cutout portion 34 and the cutout portion 34 are connected by a connection portion 38 that continuously extends along the longitudinal direction.
Of the two openings 37, 37 for the one louver 35, the other opening 37 is formed on the connecting portion 38.

The metal strip 49 shown in FIG. 2 includes two sets in which two products are 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 so as to face each other, the right and left load balance of the mold is improved.

  Unlike the metal strip as shown in FIG. 2, if all of the cutout portions 34 of a plurality of products are arranged with the opening side directed in one direction, the inter-row slit device 52 ( When the products are separated by (to be described later), there is a high possibility that a cut piece (whisker: cutting failure) due to a shift in the cutting position occurs between the notch 34 and the portion that is not. Therefore, when all of the opening portions of the cutout portions 34 of the plurality of products are arranged in one direction, the cutout portion 34 is not reached to the opening portion of the cutout portion 34 but to the position where it enters the connecting portion 38 portion. It becomes necessary to slightly widen and cut the opening. However, in this case, a step is generated in the cross section, and the left and right load balance of the mold is deteriorated. Therefore, it is preferable to manufacture a plurality of products in the arrangement as shown in FIG.

Returning to the description of the overall configuration of the flat tube fin manufacturing apparatus 200.
As shown in FIG. 1, the metal strip 49 formed by the mold device 46 in the press device 48 is intermittently sent in the transport direction by a feed device 50 provided on the downstream side of the press device 48. The feeding timing of the feeding device 50 is provided so as to operate in conjunction with the NC feeder 44, thereby enabling stable intermittent feeding.

  In the feeding device 50, a reciprocating unit 51 that is movable in the horizontal direction reciprocates between an initial position and a transfer position to pull the metal strip 49. A feed pin 55 is disposed on the upper surface of the reciprocating unit 51 so as to protrude upward. When the pin 55 is pulled, the metal strip 49 moves to the transfer position.

An inter-row slit device 52 is provided on the downstream side of the feeding device 50. The inter-row slit device 52 has an upper blade 53 disposed on the upper surface side of the metal strip 49 and a lower blade 54 disposed on the lower surface side of the metal strip 49. The inter-row slit device 52 may be provided so as to operate using the vertical movement operation of the press device 48.
The upper blade 53 and the lower blade 54 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 53 and lower blade 54, A strip-shaped product that is long in the conveying 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 52 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.
The feed device 62 pulls the metal strip 49 having the product width from the press device 48 side and pushes it to the downstream side of the cut-off device 60 when the transport unit 64 movable in the horizontal direction moves a predetermined distance. On the upper surface of the transport unit 64, a plurality of rows of feed pins 65 arranged in the horizontal direction by the number of metal strips 49 having a product width are arranged to protrude upward in a row. The feed pin 65 enters the notch 34 or the opening 37 formed in the metal strip 49 having the respective product width from below, and the feed pin 65 pulls the metal strip 49 having the respective product width. Move to the transfer position.

A cutting device 66 is provided on the downstream side of the feed device 62 of the cutoff device 60.
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 having each product width is cut into a predetermined length along the conveying direction, and the flat tube fin 30 is manufactured.

The configurations and operations of the holding device 70 and the stack device 80 arranged on the downstream side of the cutoff device 60 are shown in FIGS. 3 to 8, a plan view is shown on the upper side of each drawing, and a side view from the arrow X direction (cut-off device 60 side) in the plan view is shown on the lower side of each drawing. FIG. 9 shows a state where the stack device is viewed from a direction orthogonal to the conveying direction of the metal strip.
On the downstream side of the cut-off device 60, a metal strip 49 having a product width that has passed through the mold device 46 and the inter-row slit device 52 is held and the transfer direction of the metal strip 49 having a product width is guided, and a flat tube A holding device 70 that maintains the holding state after being formed on the fin 30 for use and a stack device 80 that stacks the flat tube fins 30 in the thickness direction are provided.

As shown in FIG. 3, the holding device 70 includes a pair of holding bodies 71 and 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.
3 and FIG. 9, the stack device 80 is a product in which a plurality of stack pins 81 are erected and the base portion 82 is held by the holding body 71 from the lower side position of the holding body 71. Elevating means that moves up and down between the width of the metal strip 49 and the position of the flat tube fin 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. 1 and FIG. 3, the fluid before 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. The cylinder 72 extends, and the widthwise both side edges and the bottom surface of the metal band 49 of the product width are set at positions where the product width 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 is set so as to hold both side edges and the bottom surface of the metal strip 49 having the product width, the metal strip 49 having the product width is sent out by the feeding device 62. 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 FIGS. 1 and 4, when the metal strip 49 having the product width is transferred to the guide space 74 of the pair of holding bodies 71 by the feeding device 62 by a predetermined length, the feeding device 62 is temporarily stopped. After that, as shown in FIG. 5, 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 the lower side. The 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 divided into flat tube fins 30. 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 the 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. It is separated from the lateral position of both 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. After laminating the flat tube fins 30 on the upper surface of the base portion 82 in the thickness direction, the servo motor 84 is driven and the ball screw 85 is rotated as shown in FIG. 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 a metal strip 49 having a product width into the guide space 74 as shown in FIG.
The series of operations described above are repeatedly executed until the number of flat tube fins 30 stacked on the stack device 80 reaches a predetermined number as shown in FIG.

A series of operations of the press device 48, the feeding device 50, the inter-row slit device 52, 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 personal 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. Note that the range in which the holding body 71 contacts and separates 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). 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 that the tact time is shortened and the flat tube fins 30 The manufacturing cost can be reduced.

FIG. 11 is a side view of an essential part showing another embodiment of the stack apparatus. The present embodiment is characterized by the relationship of the upper end height position of each stack pin 81 erected on the base portion 82. Since the other configuration of the flat tube fin manufacturing apparatus 200 is the same as that of the previous embodiment, a detailed description thereof is omitted here.
As shown in FIG. 11, the upper end height position of the stack pin 81 erected on the base portion 82 is erected on the upstream side (cut-off device 60 side) in the transfer direction of the metal strip 49 having the product width. The stack pin 81 has the highest height position, and is formed so that the upper end height position of the stack pin 81 gradually decreases as it moves downstream in the transfer direction (away from the cutoff device 60). . Specifically, the length dimension of the stack pin 81 erected on the base portion 82 is gradually shortened from the upstream side to the downstream side in the transfer direction of the metal strip 49 having the product width.

  By adopting such a configuration of the stack pins 81, the order in which the stack pins 81 are inserted into the notches 34 of the metal strip 49 having the product width is inserted in order from the cut-off device 60 side. Since the feed position of the metal strip 49 having the product width on the cut-off device 60 side is very close to or coincides with the design feed position, the stack pin 81 is notched in the metal strip 49 having the product width. No worries about misalignment when inserted through 34. Then, by inserting the stack pin 81 into the cutout portion 34 of the metal strip 49 having the product width, the position of the downstream end edge in the transfer direction of the metal strip 49 having the product width is corrected to be the design position. be able to. Therefore, the displacement of the insertion position of the stack pin 81 with respect to all the notches 34 of the metal strip 49 having the product width is prevented, and the damage of the metal strip 49 having the product width by the stack pin 81 can be prevented. Convenient. According to this form, since the raising / lowering means (servo motor 84 and ball screw 85) which are raising / lowering means required for raising / lowering the base part 82 may be single, the manufacturing apparatus of the flat tube fin 30 can be provided inexpensively. .

FIG. 12 is a main part side view showing another embodiment of the stack apparatus. This embodiment is characterized in that a plurality of base portions 82 on which stack pins 81 are erected are provided. Since the other configuration of the flat tube fin manufacturing apparatus 200 is the same as that of the previous embodiment, a detailed description thereof is omitted here.
As shown in FIG. 12, in the stack apparatus 80 according to the present embodiment, a plurality of base portions 82 on which the stack pins 81 are erected are arranged at a required interval in the feeding direction of the metal strip 49. Each base portion 82 is provided with a servo motor 84 which is an elevating means and a ball screw 85 connected to the output shaft of the servo motor. The servo motor 84 is driven in the order from the base portion 82 on the cut-off device 60 side to the base portion 82 on the leading end edge side of the metal strip 49, and the metal strip 49 in order from the stack pin 81 on the cut-off device 60 side. The cutout portion 34 is inserted. The drive amount of the servo motor 84 is set in advance so that the height positions of the upper surfaces of the base portions 82 after rising are all equal. The operational effects obtained by the configuration of the stack apparatus 80 in this embodiment are the same as those of the stack apparatus 80 shown in FIG.

FIG. 13 is a main part plan view and a main part side view showing another embodiment of the stack apparatus. In FIG. 13, the plan view of the main part is shown on the upper side, and the side view of the main part viewed from the direction of the arrow in the main part plan view is shown on the lower side. The present embodiment is characterized in that it further includes a regulation pin 86 corresponding to the stack pin 81. The stack pin 81 and the regulation pin 86 shown in FIG. 13 use round pins whose tips are formed in a tapered shape, but the flat pins shown in the previous embodiment may be adopted, and the pin shape is particularly limited. Is not to be done.
The restriction pin 86 is in the same position as the standing position of the stack pin 81 in the transfer direction of the product-width metal strip 49 and abuts on the side edge of the connecting portion 38 of the product-width metal strip 49. Standing at the position. The restriction pin 86 may be formed to have the same length as the corresponding stack pin 81.
When such a restriction pin 86 is erected, a restriction pin avoiding portion 76 for avoiding interference with the restriction pin 86 is formed on the holding body 71. As shown in FIG. 13, the restriction pin avoiding portion 76 transfers a metal band 49 having a product width as a part of the edge on the opposite surface side of one of the holding bodies 71 arranged in an opposed state. It can form in the concave notch part notched in the direction orthogonal to a direction.

When the stack pin 81 and the regulation pin 86 are erected on the upper surface of the base portion 82 in this manner, the metal strip 49 having a product width is cut off and separated into flat tube fins 30 that are flat tube fins. Then, when the flat tube fin 30 is stacked on the base portion 82, the movement of the flat tube fin 30 is regulated (guided) by the stack pin 81 and the restriction pin 86, and the width direction of the flat tube fin 30 is The shift is eliminated. That is, the flat tube fins 30 are stacked on the base portion 82 in a more orderly state.
Further, since the movement in the width direction when the flat tube fin 30 is laminated on the base portion 82 is restricted by the restriction pin 86, the holding surface of the flat tube fin 30 by the holding body 71 and the upper surface of the base portion 82 are controlled. It is also possible to increase the height difference between Accordingly, the number of flat tube fins 30 stacked on the base portion 82 can be increased, and the number of times the flat tube fins 30 are transferred from the base portion 82 can be reduced. This is advantageous in that the manufacturing fin 30 can be manufactured.

FIG. 14 is a main part side view showing another embodiment of the feeding device.
A feeding device 90 shown in FIG. 14 is for feeding the metal strip 49 (and / or the metal strip 49 having a product width) in the transport direction. The feeding device 90 includes a drive motor 92 and a plurality of rotating disks 94 connected to the output shaft of the drive motor 92. On the side surface of the outer peripheral edge of each rotating disk 94, a plurality of feed pins 96 project from the radial direction of the rotating disk 94 with a required interval in the circumferential direction of the rotating disk 94. Further, each rotary disk 94 is directly connected to the output shaft of the drive motor 92 or connected via a power transmission means such as a timing bell, and rotates in the same rotational direction while being synchronized with each other as the drive motor 92 rotates. To do.
The drive motor 92 may be controlled by the control unit 100 so that the on / off operation and the number of rotations are synchronized with the operations of other devices in the flat tube fin manufacturing apparatus 200 based on the control program. In the case where the buffer portion B of the metal strip 49 is provided, the feeding device 90 on the upstream side of the buffer portion B can be operated at a constant speed.

As shown in FIG. 14, the feed pin 96 erected on the rotating disk 94 is inserted into the notch 34 of the metal strip 49 (and / or the metal strip 49 of the product width), and the rotating disk 94 is inserted. By rotating 94, the metal strip 49 (and / or the metal strip 49 of the product width) is sent out in the transport direction. Since the standing position of the feed pin 96 in this embodiment is at least out of phase with the standing position of the feed pin 96 of the adjacent rotary disk 94, the metal strip 49 (and / or the metal strip of the product width). The feed pin 96 of at least one rotating disk 94 is inserted into the notch 34 of the body 49). This is advantageous in that the metal strip 49 (and / or the metal strip 49 of the product width) is always given a force for feeding in the transport direction and can be in a state in which the transport direction is guided. .
Such a configuration of the feeding device 90 may be applied to either the upstream position of the inter-row slit device 52 or the feeding devices 50 and 62 disposed in the cutoff device 60, respectively.

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, in the above-described embodiment, the form having the inter-row slit device 52 in order to manufacture a plurality of flat tube fins 30 in parallel in the width direction has been described in the raw metal thin plate 41. When the metal thin plate 41 formed in an elongated strip is used and one flat tube fin 30 is taken in the width direction of the thin plate 41, the configuration of the inter-row slit device 52 can be omitted. Similarly to the above-described embodiment, when a plurality of flat tube fins 30 are manufactured simultaneously in the width direction of the thin plate 41, as many flat tube fins as possible are used to maintain the left-right balance of the mold. It is preferable to provide a group in which 30 is arranged in the width direction of one thin plate and the notches 34 face each other.

  In the above-described embodiment, the holding body 71 having a U-shaped cross section is described. However, the holding body 71 may have a shape having at least a bottom surface and a side surface. May adopt the configuration of the holding body 71 formed in an L-shaped or C-shaped cross section. Further, the above-described holding body 71 has been described in the form of being continuous in the feed-out direction of the metal strip 49. However, the holding body 71 formed in a required length along the length direction of the flat tube fin 30 is a predetermined length. It is good also as a form arrange | positioned in the state which left the space | interval. If the base portion 82 is arranged so that the stack pin 81 and the regulating pin 86 enter the arrangement interval portion between the holding bodies 71, the formation of the regulating pin avoiding section 76 on the holding body 71 can be omitted. Is convenient.

  FIG. 15 is a plan view showing a modified example of the holding body and an opening side front view of the holding body as viewed from the direction of the arrow in the plan view. As shown in FIG. 15, the inner bottom surface 71 </ b> A for holding the product-width metal strip 49 in the holding body 71 is formed in a shape that gradually increases from the upstream side to the downstream side in the conveyance direction of the product-width metal strip 49. If this is done, the upstream edge of the holding body 71 disposed on the downstream side (tip surface) can be smoothly conveyed without being caught by the leading edge of the metal strip 49 having the product width. Convenient.

In the above embodiment, the fluid cylinder 72 is employed as the contact / separation means of the holding body 71, and the servomotor 84 and the ball screw 85 connected to the output shaft of the servomotor 84 are employed as the lifting / lowering means of the base portion 82. However, the contacting / separating means of the holding body 71 and the lifting / lowering means of the base portion 82 are not limited to this form. You may comprise the contacting / separating means of the holding body 71, and the raising / lowering means of the base part 82 with other well-known specific apparatuses.
In addition, it is possible to adopt an embodiment in which a part of all the above-described embodiments is appropriately combined.

DESCRIPTION OF SYMBOLS 10 Thin plate 11 Metal strip 12 Uncoiler 14 Pinch roll 16 Oil supply device 18 Press device 20 Mold device 22 Upper die set 24 Lower die set 26 Cutter 27 Pin 28 Stacker 30 Flat tube fin 32 Flat tube 34 Notch 35 Louver 36 Plate-like part 37 Opening part 38 Connecting part 40 Uncoiler 41 Thin plate 42 Loop controller 44 Feeder 46 Mold device 48 Press device 49 Metal strip 50 Feeder 51 Reciprocating unit 52 Inter-row slit device 53 Upper blade 54 Lower blade 55 Pin 60 Cut-off device 62 Feed device 64 Transport unit 65 Pin 66 Cutting device 68 Upper blade 69 Lower blade 70 Holding device 71 Holding body 71A Inner bottom surface 72 Fluid cylinder 74 Guide space 76 Restriction pin avoiding portion 80 Stack device 81 Stack pin 82 Over scan portion 84 servo motor 85 ball screw 86 regulating pin 90 feeder 92 drive motor 94 rotates disc 96 feed pins 100 control unit 200 flat tube fins manufacturing apparatus

Claims (8)

In a manufacturing apparatus for manufacturing a flat tube fin in which a notch for inserting a flat tube for a heat exchanger is formed from one side in the width direction to the other side,
A pressing device provided with a mold device that forms a notch in a raw metal thin plate to form a metal strip, and
An inter-column slit device that cuts a metal strip having a notch formed into a predetermined width and forms a metal strip having a product width formed by aligning a plurality of strips in the width direction;
A cut-off device for cutting a metal strip having a product width into a predetermined length;
Each of the metal strips having a plurality of product widths formed by the inter-slit slit device, sent out in the transport direction, passed through the cut-off device, and protruded from the downstream side of the cut-off device in the transport direction is held. A holding device that guides the transfer direction of the metal strip in the product width and continues the holding state even after being cut into a predetermined dimension by the cut-off device and formed as a flat tube fin;
A stack device for laminating flat tube fins cut to a predetermined length by a cut-off device;
The holding device is a pair of holding members provided so as to be movable toward and away from each other between a lateral position of the metal strip having the product width fed from the inter-row slit device and a holding position of the metal strip having the product width. Have
The stack device is inserted into the notch portion for laminating flat tube fins formed by cutting a metal strip having a product width held by the holding device by the cut-off device into a predetermined length. A plurality of stack pins arranged in alignment in the length direction of the flat tube fins, and arranged so as to be movable up and down with respect to the holding device from the lower side of the holding device. Fin manufacturing equipment.   The stacking device operates such that the amount of rise of the stacking pin with respect to the holding device gradually decreases with an increase in the number of stacked flat tube fins inserted through the stacking pin. The flat tube fin manufacturing apparatus according to claim 1.   The stack pins are sequentially inserted from a notch portion on the cut-off device side of the metal strip having the product width toward a notch portion on the downstream side in the transfer direction of the metal strip having the product width. The flat tube fin manufacturing apparatus according to claim 1 or 2.   The flat tube according to any one of claims 1 to 3, wherein an upper end height position of the stack pin is formed so as to gradually become lower as the distance from the cut-off device side increases. Fin manufacturing equipment.   The flat tube according to any one of claims 1 to 4, wherein the stack device is further provided with a regulation pin for regulating a side surface position of the metal strip having the product width. Fin manufacturing equipment.   6. The flat tube fin manufacturing method according to claim 5, wherein the holding body is provided with a restriction pin avoiding portion for preventing interference with the restriction pin rising toward the holding body. apparatus.   The flat tube fin manufacturing apparatus according to claim 5 or 6, wherein the lifting and lowering operation of the restriction pin is synchronized with the lifting and lowering operation of the stack pin.   The said holding body is formed in the U-shaped cross section, The manufacturing apparatus of the flat tube fin as described in any one of Claims 1-7 characterized by the above-mentioned.

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