JP7006994B2 - Fin manufacturing equipment for flat tubes - Google Patents

Description

The present invention relates to a device for manufacturing a fin for a flat tube used as a fin for a heat exchanger that dissipates heat from the heat exchanger.

A conventional heat exchanger such as a cooler is generally configured by laminating a plurality of heat exchanger fins having a plurality of through holes for inserting a heat exchange tube. Such heat exchanger fins can be manufactured by the heat exchanger fin manufacturing apparatus shown in FIG.

The apparatus for manufacturing fins for heat exchangers is provided with an uncoiler 12 in which a thin plate 10 made of a metal such as aluminum is wound in a coil shape. The thin plate 10 drawn out from the anchorer 12 via the pinch roll 14 is inserted into the oil applying device 16, the processing oil is adhered to the surface thereof, and is supplied to the mold device 20 provided in the press device 18.

The mold device 20 is provided with an upper die set 22 that can move up and down and a lower die set 24 that is in a stationary state. By this mold device 20, a plurality of colored through holes (not shown) having collars of a predetermined height formed around the through holes are formed in a predetermined direction at predetermined intervals. Hereinafter, a thin metal plate having through holes or the like processed is referred to as a metal strip 11. The metal strip 11 is transferred in a predetermined direction by a predetermined distance, and then cut to a predetermined length by a cutter 26. The product (heat exchanger fin) cut to a predetermined length is housed in the stacker 28. The stacker 28 has a plurality of stack pins 27 erected in the vertical direction, and is laminated with heat exchanger fins manufactured by inserting the stack pins 27 into the through holes.

Japanese Unexamined Patent Publication No. 5-192728

Conventional fins for heat exchangers have a metal strip formed with a plurality of through holes into which a heat exchange tube is inserted. However, at present, heat exchangers using a multi-hole flat tube have been developed. Fins for heat exchangers using this flat tube (hereinafter, may be referred to as fins for flat tubes) are shown in FIGS. 15A and 15B.

The flat tube fin 30 has notches 34 in which the flat tube 32 is inserted at a plurality of positions, and a plate-shaped portion in which a louver 35 is formed between the notches 34 and the notches 34. 36 is formed. The cutout portion 34 is formed only from one side in the width direction of the flat tube fin 30. Therefore, the plurality of plate-shaped portions 36 between the notch portion 34 and the notch portion 34 are connected by a connecting portion 38 extending in the longitudinal direction.

By the way, when trying to manufacture such a fin for a flat tube by a conventional fin manufacturing apparatus for a heat exchanger as shown in FIG. 14, the following problems have arisen. That is, the conventional fins for heat exchangers are provided with a plurality of through holes, and the manufactured fins are laminated on the stacker 28 in which the stack pins 27 are arranged so as to penetrate the through holes. In such a flat tube fin, since the through hole is not formed, the stack pin 27 is inserted into the notch 34 when laminating. However, since the flat tube fins do not have a symmetrical shape in the width direction, the weight balance in the width direction is unbalanced, and even if the stack pin 27 is inserted into the notch 34, the flat tube fins are tilted. In some cases, it may not be possible to stack.

Therefore, by raising the stacker 28 having the stack pin 27 and dropping the flat tube fin when it is brought close to the flat tube fin to be laminated, the falling distance of the flat tube fin is shortened and the flat tube fin is tilted. We considered that it might be possible to solve the stacking problem caused by this.

However, when the stacker 28 is moved up and down in a state where the fins for the flat tube through which the stack pin 27 is inserted are stacked, the frictional force generated between the stack pin 27 and the fin for the flat tube causes the flat tube to be used. The fins may be deformed.

That is, there is a problem in how to ensure and efficiently perform the flat tube fins without deforming them when laminating the flat tube fins.

Therefore, the present invention has been made to solve the above problems, and an object thereof is to reliably and efficiently manufacture the fins for flat tubes without deforming the fins for flat tubes when the fins for flat tubes having no through holes are laminated. It is an object of the present invention to provide a fin manufacturing apparatus for a flat tube.

According to the device for manufacturing a flat tube fin in the present invention, a flat tube fin having 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 the manufacturing equipment, a press device provided with a mold device in which a notch is formed in an unprocessed metal thin plate to form a metal strip, and a metal strip in which the notch is formed have a predetermined width. An inter-row slit device that cuts and arranges a plurality of metal strips of product width to form a metal strip of product width, and a cutoff that cuts the metal strip of product width to a predetermined length to form fins for the flat tube. Each of a plurality of product-width metal strips formed by the device and the inter-row slit device, sent out in the transport direction, passed through the cutoff device, and protruded from the downstream side of the cutoff device in the transport direction. The metal strips of the product width and the flattened metal strips of the product width can be brought into contact with each other between the lateral positions of the metal strips of the product width and the holding positions of the metal strips of the product width. A holding device having a pair of holding bodies for holding tube fins, a holding body contacting / separating mechanism for contacting / separating the pair of holding bodies, and the flattened body cut to a predetermined length by the cutoff device. A stack pin holder on which a plurality of stack pins inserted into the notch portion of the flat tube fin held by the holding device are erected in order to stack the tube fins, and the stack pin. A fin receiving portion that abuts on the lower surface of the flat tube fin at the bottom of the plurality of inserted flat tube fins, and a first moving mechanism that moves the fin receiving portion along the stack pin. A stacking device having a second moving mechanism for moving the stack pin holder along the vertical direction of the stack pin independently of the movement of the fin receiving portion, at least the cutoff device, and the holding device. When the pair of holding bodies is in a holdable position capable of holding the metal strip of the product width. In addition, the first treatment of operating the first moving mechanism to raise the fin receiving portion to the stacking start reference height position and the metal strip having the product width held by the pair of holding bodies are cut. By the time it is cut into the flat tube fins by the off device, the first moving mechanism and the second moving mechanism are synchronized. By operating each of them, the fin receiving portion and the stack pin holder are raised to the receiving height position of the flat tube fin while maintaining the positional relationship between the fin receiving portion and the stack pin holder. In the second treatment and when the fin receiving portion for the flat tube cut to a predetermined size by the cutoff device is received by the fin receiving portion, the holding body contact / separation mechanism is operated to separate the pair of holding bodies. After the third process of causing the flat tube fins to be delivered from the pair of holding bodies to the fin receiving portion, the first moving mechanism and the second moving mechanism are operated in a synchronized state. The tip of the stack pin is the tip of the stack pin holding portion and the stack pin holding body in a state where the fins for the flat tube are laminated, while maintaining the positional relationship between the fin receiving portion and the stack pin holding body. The fourth process of lowering the flat tube fins from the pair of holding bodies until they are lower than the delivery height position, and the first moving mechanism are operated to set the fin receiving portion to a preset height. It is characterized in that the fifth process of lowering the height and the fifth process are executed respectively.

By adopting this configuration, the stack pin holder and the fin receiving portion in the state where the fins for flat tubes are laminated can be moved up and down in a synchronized state while maintaining the positional relationship with each other, and the notch can be used. The frictional force acting between the part and the stack pin can be minimized. Therefore, deformation of the notch due to friction between the stack pin and the notch is prevented, and the fins for the flat tube can be reliably and efficiently laminated in a state where the shape and dimensional accuracy are high.

Further, the preset height is preferably the thickness dimension of the flat tube fin cut to the predetermined dimension.

According to this configuration, when the fins for flat tubes are continuously laminated, the distance that the fin receiving portion moves independently can be minimized, and the frictional force acting between the notch portion and the stack pin can be minimized. Can be minimized and deformation of the flat tube fins can be prevented.

Further, it is preferable that the motion control unit executes the sixth process of operating the holding body contact / detachment mechanism to return the pair of holding bodies to the holdingable position after the fifth processing is executed. Further, after executing the sixth process, it is more preferable to return to the second process and repeatedly execute the second process to the sixth process a predetermined number of times.

According to these configurations, it is possible to continuously perform the process of laminating the fins for flat tubes on the stack device.

Further, the operation control unit raises a plurality of the flat tube fins that are inserted through the stack pin and laminated, and the uppermost flat tube among the laminated flat tube fins. A seventh process may be performed in which the upper surface of the fins is brought into contact with the lower surface of the pair of holding bodies and at least the first moving mechanism is actuated so as to align the plurality of laminated fins for the flat tubes. preferable.

According to this configuration, even if the flat tube fins laminated on the fin receiving portion are slightly inclined and the laminated state is not preferable, they are laminated between the fin receiving portion and the holding device. By pressing the upper surface and the lower surface of the flat tube fins, a neatly aligned laminated state can be obtained.

Further, the height position of the upper end of the stack pin may be formed so as to gradually decrease as the distance from the cutoff device side increases.

Even with this configuration, the stack pin is inserted through the notch on the cutoff device side with little misalignment with respect to the metal strip having the product width sent out from the cutoff device. That is, by inserting the first stack pin into the notch on the cutoff device side, the position of the tip side portion of the metal strip of the product width in the transfer direction can be corrected, and it is reliable for all the notches. The stack pin can be inserted through.

Further, the stack device is provided at a required distance from the side surface position of the metal strip of the product width or in contact with the side surface of the metal strip of the product width, and the metal strip of the product width is provided. It may be characterized by having a regulating pin that can be moved in the vertical direction in order to regulate the deviation in the width direction of the.

According to this configuration, the deviation in the width direction of the metal strip of the product width is regulated, and the deviation in the width direction of the fins for the flat tube is regulated even after being cut, so that there is no deviation in the width direction. It is possible to stack them.

Further, the holding device may be provided with a regulation pin avoiding portion for preventing interference with the regulation pin rising toward the holding device.

According to this configuration, the regulation pin can move in the vertical direction through the regulation pin avoidance portion.

Further, the vertical operation of the regulation pin may be characterized in that it is synchronized with the vertical operation of the stack pin.

According to this configuration, the stack pin can be more reliably inserted in the direction orthogonal to the notch portion.

According to the present invention, it is possible to prevent deformation of the notch portion due to the stack pin at the time of laminating the fins for the flat tube, and to efficiently stack the fins for the flat tube on the stacking device.

It is a side view which shows the schematic whole structure of the manufacturing apparatus of the fin for a flat tube which concerns on this invention. It is a top view of the metal strip processed by the mold apparatus of FIG. It is a side view of a holding device and a stacking device. FIG. 3 is a front view when viewed from the front in the transport direction. It is a top view of the fin receiving part. It is a top view in the state which the fin for a flat tube is laminated on the fin receiving part. It is explanatory drawing which shows the movement of the regulation pin at the time of stacking a fin for a flat tube. It is a side view which shows the state of the stacking apparatus at the initial position at the time of stacking the fin for the 1st flat tube. It is a side view which shows the state of the stacking apparatus at the stacking start reference height position at the time of stacking the fin for the 1st flat tube. It is a side view which shows the state of the stacking apparatus at the receiving height position at the time of stacking the fin for the 1st flat tube. It is a side view which shows the state of the stacking apparatus at the retracted height position at the time of stacking the fin for the 1st flat tube. It is a side view which shows the state of the stacking apparatus when the fin receiving part is lowered after stacking of the fin for the 1st flat tube. It is a front view of the transport direction which shows the state which the uppermost surface flat tube fin is in contact with a pair of holding bodies in the state which a plurality of flat tube fins are stacked. It is a side view which shows the schematic whole structure of the manufacturing apparatus of the fin for a conventional heat exchanger. It is a plan view (A) of the fin for a flat tube and the front view (B) of a fin for a flat tube.

FIG. 1 shows an overall configuration of a manufacturing apparatus 100 for a flat tube fin (hereinafter, simply referred to as a flat tube fin) for a heat exchanger in the present embodiment. The flat tube fin manufacturing apparatus 100 in the present embodiment can be roughly classified into a fin forming portion 100A and a stack portion 100B. The fin forming unit 100A includes a material supply unit 47, a press device 48, a feed device 50, an inter-row slit device 52, and a cutoff device 60. The stack portion 100B includes a holding device 70 and a stack device 80.

The operation control of each configuration in the flat tube fin manufacturing apparatus 100 according to the present embodiment is an operation control unit having at least an operation control program stored in the storage unit and a CPU that operates based on the operation control program. It is done by 90. Such an operation control unit 90 can be realized by a personal computer or the like provided separately from the flat tube fin manufacturing device 100, in addition to the form of being built in the flat tube fin manufacturing device 100.

The material supply unit 47 in the fin forming unit 100A has an anchorer 40, a loop controller 42, and an NC feeder 44. The thin plate 41 made of raw metal such as aluminum, which is the material of the fin 30 for the flat tube, is coiled around the anchorer 40. The thin plate 41 pulled out from the anchorer 40 is inserted into the loop controller 42, and the fluttering of the thin plate 41 that is intermittently fed is suppressed by the loop controller 42. An NC feeder 44 is provided on the downstream side of the loop controller 42. The NC feeder 44 is composed of two rollers that come into contact with the upper surface and the lower surface of the thin plate 41, and the two rollers are rotationally driven to sandwich the thin plate 41 with each other and intermittently feed the thin plate 41. On the downstream side of the NC feeder 44, a press device 48 in which the die device 46 is arranged is provided. In the press device 48, the thin plate 41 is formed on the metal strip 49 having a predetermined shape by the die device 46.

The metal strip 49 formed in the press device 48 is shown in FIG. In the metal strip 49 shown in FIG. 2, four products are formed side by side in the product width direction orthogonal to the arrow A which is the transport direction. As for the specific product obtained from the metal strip 49, as shown in FIG. 15, notches 34 into which the flat tube 32 is inserted are formed at a plurality of places, and the notches 34 and the notches 34 are formed. A plate-shaped portion 36 having a louver 35 is formed between the portion 34 and the portion 34. Further, on both ends of the louver 35 in the width direction, openings 37 formed by cutting up a thin metal plate are formed. Of the two openings 37, 37 with respect to one louver 35, the opening 37 on one side is formed on the tip end side of the plate-shaped portion 36.

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

The metal strip 49 shown in FIG. 2 is formed of two sets in which two products are arranged so as to face each other so that the opening sides of the notched portions 34 are adjacent to each other. That is, the pair in which the opening sides of the notch portions 34 of the two products are arranged facing each other is arranged in a state where the connecting portions 38 are adjacent to each other. By arranging the four products so as to face each other in this way, the load balance between the left and right sides of the mold is improved.

In addition, unlike the metal strip as shown in FIG. 2, when the cutout portions 34 of the plurality of products are arranged so as to face the opening side in one direction, the inter-row slit device 52 (which separates the products) When the products are separated from each other by (described later), there is a high possibility that a cut piece (whisker: poor cutting) will occur between the cutout portion 34 and the portion other than the cutout portion 34 due to the deviation of the cutting position. Therefore, when the opening sides of the notch portions 34 of a plurality of products are all arranged facing in one direction, the notch portion 34 is not at the boundary of the openings of the notch portions 34 but at a position where it enters the connecting portion 38 portion. It will be necessary to widen the opening part of the and cut it. However, in this case, a step is generated in the cross section, and the load balance between the left and right sides of the mold becomes poor. Therefore, it is preferable to manufacture a plurality of products in the arrangement shown in FIG.

Returning to the description of the overall configuration of the fin manufacturing apparatus 100 for flat tubes. As shown in FIG. 1, the metal strip 49 formed by the die device 46 in the press device 48 is intermittently fed in the transport direction by the feed device 50 provided on the downstream side of the press device 48. The feed timing of the feed device 50 is set to operate in conjunction with the NC feeder 44 by the operation control unit 90, which enables stable intermittent feed.

The movement of the feed device 50 is controlled so that the reciprocating unit 51 that can move in the horizontal direction reciprocates between the initial position and the transfer position by the motion control unit 90, and the metal strip 49 is controlled from the press device 48. Tow. A feed pin 55 is arranged so as to project upward on the upper surface of the reciprocating unit 51, and the feed pin 55 enters the notch 34 or the opening 37 formed in the metal strip 49 from below and feeds. 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 feed device 50. The inter-row slit device 52 has an upper blade 53 arranged on the upper surface side of the metal strip 49 and a lower blade 54 arranged on the lower surface side of the metal strip 49. The inter-row slit device 52 may be provided so as to operate by utilizing the vertical movement operation of the press device 48. Further, the operation of the inter-row slit device 52 can be controlled by controlling the operation of the drive mechanism of the inter-row slit device 52 (not shown) by the operation control unit 90. The upper blade 53 and the lower blade 54 are formed in a long length along the transport direction of the metal strip-shaped body 49, and the upper blade 53 and the lower blade 54 in which the metal strip-shaped body 49 to be intermittently fed are engaged with each other have a predetermined width. It is cut to produce a strip-shaped product (hereinafter, may be referred to as a metal strip-shaped body 49'with a product width) that is long in the transport direction.

The metal strips 49'of the product width in a state of being cut to a predetermined width (product width) by the inter-row slit device 52 and arranged in a plurality of lines are sent into the cutoff device 60 provided separately. Before being sent to the cutoff device 60, the plurality of product-width metal strips 49'are arranged so as to be spaced apart from each other by adjacent product-width metal strips 49'. Further, before being fed to the cutoff device 60, the metal strips 49'of a plurality of product widths temporarily store a length longer than the single feed length of the cutoff device 60, so that the metal strips 49'are downward. The buffer portion B is formed so as to be bent.

In the cutoff device 60, a feeding device 62 for intermittently transporting the metal strip 49'of each product width in the transport direction is provided. The structure of the feed device 62 is such that the feed length at one time can be made longer than the structure of the feed device 50 provided on the downstream side of the press device 48. The operation of the feed device 62 is also controlled by the motion control unit 90, and the transport unit 64, which can move in the horizontal direction, pulls the metal strip 49'of the product width from the press device 48 side by moving a predetermined distance. , Extruded to the downstream side of the cutoff device 60. 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'of the product width are arranged so as to project upward in a row. The feed pin 65 enters the notch 34 or the opening 37 formed in the metal strip 49'of each product width from below, and is pulled by the feed pin 65 to pull the metal strip 49 of each product width. 'Is moved to the transfer position.

In the cutoff device 60, a cutting device 66 is provided on the downstream side of the feeding device 62. The operation of the cutting device 66 is controlled by the operation control unit 90, and the flat tube fin 30 is formed by cutting the metal strip 49'of each product width to a predetermined dimension (predetermined length). The cutting device 66 has an upper blade 68 arranged on the upper surface side of the metal strip 49'of each product width, and a lower blade 69 arranged on the lower surface side of the metal strip 49'of each product width. By closing the mold of the upper blade 68 and the lower blade 69, the metal strip 49'of each product width is cut to a predetermined length along the transport direction, and the fin 30 for a flat tube is manufactured.

On the downstream side of the cutoff device 60, a holding device 70 as a stack portion 100B and a stack device 80 for laminating the manufactured flat tube fins 30 in the plate thickness direction (vertical direction) are provided. Note that FIG. 3 shows a further enlarged and detailed view of the holding device and the stacking device of FIG. FIG. 4 shows a front view of FIG. 3 as viewed from the downstream side in the transport direction. FIG. 5 is a plan view of a fin receiving portion in a part of the stack device. FIG. 6 is a plan view in a state where fins for a flat tube are laminated on a fin receiving portion. FIG. 7 is an explanatory diagram showing the movement of the regulating pin when stacking the fins for a flat tube.

The holding device 70 slidably supports a metal strip 49'with a product width that emerges from the downstream side of the cutoff device 60 in the transport direction. Specifically, the holding device 70 can mount the widthwise ends of the product-width metal strip 49'exiting from the cutoff device 60 on both sides of the product-width metal strip 49'. It has a pair of holding bodies 71, 71 arranged in. Each of the holding bodies 71 and 71 has a U-shaped cross-sectional shape in a direction orthogonal to the longitudinal direction (transporting direction) of the metal strip-shaped body 49'of the product width. That is, when the holding bodies 71 and 71 are viewed from the transport direction, as shown in FIG. 4, the recesses 74 recessed outward in the width direction are formed so as to face each other. Such a holding device 70 is in a holding state even after being cut to a predetermined length by the cutting device 66 and formed on the flat tube fin 30 from the time point of the metal strip 49'of the product width before being cut. Can be maintained.

Further, the holding bodies 71 and 71 can move in contact with each other in the horizontal direction between the lateral position of the metal strip 49'of the product width and the holding position holding the metal strip 49'of the product width (in addition, (Movable). A fluid cylinder 72 whose operation is controlled by an motion control unit 90, which will be described later, is provided as a retainer contact / detachment mechanism for moving the retainers 71 and 71 (in drawings other than FIG. 1). The display of the cylinder 72 is omitted).

The stack device 80 is for a flat plate-shaped stack pin holder 82 on which a stack blade 81 (five in FIG. 3) as a plurality of stack pins is erected, and for a plurality of flat tubes inserted through the stack blade 81. It has a flat plate-shaped fin receiving portion 83 that abuts on the lower surface of the flat tube fin 30 at the lowermost portion of the fins 30.

The stack blade 81 in the present embodiment has a size that can be inserted into the notch 34 of the flat tube fin 30, and specifically, the long side in the width direction of the product matches the shape of the notch 34. It is a substantially L-shaped shape that is formed and has a short side orthogonal to this. Further, the tip portion of the stack blade 81 may be formed sharply, or the tip portion may be formed in a rounded shape.

Further, as shown in FIG. 5, the fin receiving portion 83 in the present embodiment is formed of a rectangular plate having a flat upper surface for laminating the fins 30 for flat tubes. A passage hole 93 for inserting the stack blade 81 and the regulation pin 94 and a regulation pin avoidance portion 96 are bored in the fin receiving portion 83 at positions corresponding to the plane positions of the stack blade 81 and the regulation pin 94. On the other hand, the upper surface of the stack pin holder 82 is formed on the flat end surface as in the fin receiving portion 83.

Further, FIGS. 6 and 7 show that the regulation pin 94 is provided (omitted in other drawings). The regulation pin 94 is at the same position as the standing position of the stack blade 81 in the transfer direction of the metal strip 49'of the product width, and the side edge of the connecting portion 38 of the metal strip 49'of the product width ( It is erected at a required distance from the side surface position) or at a position where it abuts on the side edge of the connecting portion 38. That is, the regulation pin 94 is arranged at a position where the stack blade 81 and the regulation pin 94 sandwich the connecting portion 38 of the metal strip 49'of the product width in the width direction. The regulation pin 94 is erected on the upper surface of the stack pin holder 82 like the stack blade 81. Further, the regulation pin 94 is formed longer than the length of the corresponding stack blade 81. The regulation pin 94 is shown only in FIGS. 6 and 7 for the sake of simplification of the drawings, and the display of the regulation pin 94 is omitted in other drawings.

When such a regulation pin 94 is erected, a regulation pin avoidance portion 96 for avoiding interference with the regulation pin 94 is formed on the holding body 71. As shown in FIG. 6, the restricting pin avoiding portion 96 has a part of the end edge on the facing surface side of one of the holding bodies 71 arranged in a facing state of the metal strip-shaped body 49'of the product width. It can be a concave notch notched in a direction (width direction) orthogonal to the transfer direction.

If the stack blade 81 and the regulation pin 94 are erected on the upper surface of the stack pin holder 82 in this way, the metal strip 49'of the product width is cut off and separated into the flat tube fins 30. , Has the following effects.

That is, the regulation pin 94 is inserted and removed from the through hole 98 of the regulation pin guide 97 provided at the upper position of the stack device 80 as the stack pin holder 82 moves up and down. The regulation pin 94 during the ascending / descending operation of the stack device 80 is always maintained in a state of being inserted into the through hole 98 of the regulation pin guide 97, and the metal strip 49'of the product width and the fin 30 for the flat tube are provided. In the internal space of the pair of holding bodies 71, the positioned state is maintained without being displaced in the width direction. Here, the regulation pin guide 97 is suspended and held by a mounting plate 99 also provided at an upper position of the stack device 80. The mounting plate 99 is mounted on the base B. Further, the base B has a built-in linear guide (not shown), which is a so-called linear guide for moving the pair of holding bodies 71 in contact with each other.

Further, when the flat tube fin 30 is laminated on the stack device 80, the stack blade 81 and the regulation pin 94 can be brought into contact with or on the verge of contact with the side surface position of the flat tube fin 30. That is, the flat tube fin 30 is sandwiched in the width direction by the stack blade 81 and the regulation pin 94, and the movement of the flat tube fin 30 in the width direction can be restricted. Therefore, the flat tube fins 30 can be laminated on the stack pin holder 82 in a more orderly state.

The stack pin holder 82 in the present embodiment has a pallet 82A as a base and a magazine 82C to which a spacer 82B for holding the stack blade 81 is fixed, and holds the stack blade 81 in an upright state. The spacer 82B is attached to the pallet 82A via the magazine 82C. The fin receiving portion 83 and the stack pin holder 82 in such a stack device 80 can independently move in the vertical direction by the first moving mechanism 84 and the second moving mechanism 85 along the vertical direction of the stack blade 81, respectively. It has become.

Further, as shown in FIG. 8, in the present embodiment, the first moving mechanism 84 for moving the fin receiving portion 83 includes a first servomotor 84A, a first ball screw 84B, a first timing belt 84C, and an elevating plate 84D. is doing. The first ball screw 84B is provided parallel to the vertical direction of the stack blade 81. The first timing belt 84C is hung between the first timing pulley 84F attached to the output shaft 84E of the first servomotor 84A and the first driven timing pulley 84G attached to one end of the first ball screw 84B. Has been passed. The elevating plate 84D is attached in a state of being screwed to the first ball screw 84B, and is provided so as to be able to support the fin receiving portion 83. The elevating plate 84D vertically supports the fin receiving portion 83 along the axial direction of the first ball screw 84B (along the erection direction of the stack blade 81) according to the rotation direction of the first ball screw 84B. It is movable.

In the present embodiment, the first moving mechanism 84 described above is provided for each of both ends of the fin receiving portion 83 in the longitudinal direction (the transport direction of the metal strip 49'of the product width). Further, the operation control unit 90 controls the operations of the first moving mechanism 84 to synchronize with each other so that the upper surface of the fin receiving portion 83 is kept horizontal when the fin receiving portion 83 is moved up and down.

Further, in the present embodiment, the second moving mechanism 85 for moving the stack pin holder 82 has a second servomotor 85A, a second ball screw 85B, a second timing belt 85C, and an elevating table 85D. The second ball screw 85B is provided at the lower position of the stack pin holder 82 in parallel with the vertical direction of the stack blade 81. The second timing belt 85C is hung between the second timing pulley 85F attached to the output shaft 85E of the second servomotor 85A and the second driven timing mouri 85G attached to one end of the second ball screw 85B. Has been done. The lift 85D is attached with its lateral end screwed into the second ball screw 85B, and its upward end is attached to the stack pin holder 82. The lift 85D moves the stack pin holder 82 in the vertical direction along the axial direction of the second ball screw 85B (along the vertical direction of the stack blade 81) according to the rotation direction of the second ball screw 85B. Is possible. The operation of the second moving mechanism 85 is controlled by the operation control unit 90 so that the second moving mechanism 85 operates in a state of being independent and synchronized with the operation of the first moving mechanism 84. When synchronizing the operations of the second moving mechanism 85 and the first moving mechanism 84, each operation is performed by the operation control unit so as to maintain the positional relationship with each other (the state in which the relative position is maintained). It will be controlled by 90.

Subsequently, the operation of the holding device 70 and the stacking device 80, which are characteristic operations in the flat tube fin manufacturing device 100 in the present embodiment, will be described in detail. As shown in FIG. 8, when the stack device 80 is in the standby position, the fin receiving portion 83 and the stack pin holder 82 are positioned below the holding device 70 so as not to interfere with the contact / separation operation of the holding device 70. is doing. When the operation for stacking the flat tube fins 30 on the stacking device is started, the operation control unit 90 operates only the first movement mechanism 84. Specifically, the first servomotor 84A is driven to rotate the first ball screw 84B via the first timing belt 84C, and the elevating plate 84D is brought into contact with the fin receiving portion 83 as shown in FIG. The fin receiving portion 83 is raised along the first ball screw 84B to the stacking start reference height position (first treatment). The alternate long and short dash line in FIGS. 7 to 10 is the pass line of the metal strip 49'of the product width (the height position where the flat tube fin 30 is transferred from the pair of holding bodies 71 to the fin receiving portion 83).

Next, the motion control unit 90 operates the fluid cylinder 72 to bring the recesses 74 of the pair of holding bodies 71 close to each other, and the recesses 74 of the pair of holding bodies 74 of the product width delivered from the feed device 62 of the cutoff device 60. The process of making both ends of the metal strip 49'in the width direction and the bottom surface into a holdable state (holdable position) is executed. As a result, the metal strip 49'of the product width can be brought into a state where the transport direction is guided by the guide space formed by the recesses 74 of the pair of holding bodies 71. When the metal strip 49'of the product width having a predetermined length is fed into the guide space by the pair of holding bodies 71, the motion control unit 90 executes a process of suspending the operation of the feed device 62 of the cutoff device 60.

Next, as shown in FIG. 10, the motion control unit 90 operates the first moving mechanism 84 and the second moving mechanism 85 in a synchronized state so as to maintain the positional relationship with each other. As a result, the fin receiving portion 83 and the stack pin holder 82 have a height (flat tube) in which the stack blade 81 penetrates the notch portion 34 of the metal strip 49'of the product width held by the pair of holders 71. It rises to the receiving height position of the fin 30) (second processing). The height (length) of the upper ends of the five stack blades 81 in the present embodiment is gradually lowered as the transport direction progresses (that is, the height position of the upper ends of the five stack blades 81 is set). , It is formed so as to gradually decrease as the distance from the cutoff device 60 increases. By adopting such a stack blade 81, when the stack pin holder 82 rises, a cutout portion on the cutoff device 60 side with respect to the metal strip 49'of the product width sent out from the cutoff device 60. The stack blade 81 can be inserted in order from 34.

Since the delivery position of the metal strip 49'of the product width on the cutoff device 60 side is very close to or coincides with the design delivery position, the stack blade 81 is cut from the metal strip 49'of the product width. There is no concern about misalignment when inserting through the notch 34. Then, by inserting the stack blade 81 from the cutoff device 60 side, the position of the tip edge on the downstream side in the transfer direction of the metal strip 49'of the product width can also be corrected to be the design position. Therefore, the insertion position of the stack blade 81 can be prevented from being displaced with respect to all the notches 34 of the metal strip 49'of the product width, and the metal strip 49'of the product width can be prevented from being damaged by the stack blade 81. .. Of course, it is also possible to make all the lengths (heights) of the stack blades 81 equal.

Next, the motion control unit 90 is held by a pair of holding bodies 71, and the metal strip 49'of the product width in a state where the stack blade 81 is inserted through the notch portion 34 is cut into a predetermined length by the cutoff device 60. The process of forming the fin 30 for a flat tube (cut-off process) is executed. When the metal strip 49'of the product width is cut in this way, the stack blade 81 is inserted into the notch 34 and the metal strip 49'of the product width is held, so that the cutoff device 60 is used. It is possible to suppress the fluttering of the metal strip 49'of the product width during the cutoff process. The flat tube fins 30 individualized by the cutting device 66 are held in each holding body 71 in a state where the stack blade 81 is inserted into the notch portion 34 as before the individualized pieces.

Next, the motion control unit 90 operates the fluid cylinder 72 to execute a process (third process) of separating the pair of holding bodies 71 laterally in the width direction of the flat tube fins 30. As each holding body 71 moves horizontally to release the holding of the flat tube fin 30, the flat tube fin 30 is placed on the fin receiving portion 83 along the stack blade 81 inserted through the notch 34. Fall into. At this time, since the distance between the upper surface of the fin receiving portion 83 and the holding surface (inner bottom surface of the concave portion 74) of the flat tube fin 30 of the holding body 71 is very small, the falling distance can be short, and the flat tube fin 30 can be orderedly laminated (received) on the fin receiving portion 83.

Next, the motion control unit 90 synchronizes to maintain the positional relationship (relative positional relationship) between the first moving mechanism 84 and the second moving mechanism 85 so as not to interfere with the holding position of the pair of holding bodies 71. It is operated in this state, and as shown in FIG. 11, a process (fourth process) of lowering the fin receiving portion 83 and the stack pin holder 82 to the retracted height position is executed. At this time, the retracted height position of the fin receiving portion 83 and the stack pin holder 82 is such that the upper end of the stack blade 81 is the path line of the metal strip 49'with the product width (the fin 30 for the flat tube is provided from the pair of holders 71). It is set below the fin receiving portion 83). By executing such a fourth process, the flat tube fins 30 placed (laminated) on the fin receiving portion 83 are fins without causing friction between the stack blade 81 and the notch portion 34. Together with the receiving portion 83 and the stack pin holder 82, the metal strip 49'(flat tube fin 30) having a product width can be retracted to a predetermined height position that does not interfere with the transport.

Next, the motion control unit 90 operates only the first movement mechanism 84, and as shown in FIG. 12, only the fin receiving portion 83 on which the flat tube fin 30 is mounted has a preset height (here, flat). A process (fifth process) of lowering the tube fin 30 at a height corresponding to the plate thickness dimension is executed. By lowering only the fin receiving portion 83 at a height corresponding to the plate thickness dimension of the flat tube fin 30 in this way, the uppermost flat tube fin 30 when laminating the next flat tube fin 30 is provided. The height position of the upper surface can be matched with the height of the upper surface of the fin receiving portion 83 when receiving the first flat tube fin 30.

After executing the fifth process, the motion control unit 90 operates the fluid linder 72 to execute a process (sixth process) of returning the pair of holding bodies 71 to the holdable position. Further, the operation control unit 90 sets a counter value of the number of stacked flat tube fins 30 stored in advance in a storage unit (not shown) at the same time as or before and after the sixth process (a numerical value is set at the start of stacking of the flat tube fins 30). The process of adding 1 to (reset to 0) is performed. Next, the operation control unit 90 executes a process (a stacking number confirmation process) for comparing the comparison target value previously stored in a storage unit (not shown) with the counter value of the number of stacked sheets. When the comparison target value> the counter value of the number of stacked sheets, the operation control unit 90 executes the process of returning to the second process, and repeatedly executes the process up to the process of confirming the number of stacked sheets.

When the comparison target value = the counter value of the number of stacked sheets is reached in the operation control unit 90 in the stacking number confirmation process, the stacking device of the flat tube fins 30, the fin receiving portion 83, and the stack pin holding are held by a stacking device moving mechanism (not shown). A process of moving the body 82 to the stack delivery position (movement process for taking out the laminate) is executed. Next, the operation control unit 90 executes a process of taking out the laminated body of the flat tube fins 30 from the stack device 80 (a laminated body taking-out process) by a laminated body taking-out device (not shown). Next, the operation control unit 90 resets the counter value of the number of stacked sheets of the storage unit to 0, and then activates the stack device moving mechanism to return the stack device 80 to the original position or a separate fin receiving unit 83. The stack pin holder 82 is attached (stack device reset process).

Next, the motion control unit 90 operates the first movement mechanism 84, executes a process (first process) of raising the fin receiving unit 83 to the stacking start reference height position, and subsequently holds the pair of holding bodies 71. The process of setting the possible position and the process after the second process are repeatedly executed in the same manner as described above.

According to the configuration of the flat tube fin manufacturing apparatus 100 in the present embodiment, the stack in a state where the flat tube fins 30 are laminated so as not to interfere with the contact / separation operation of the pair of holding bodies 71 in the holding device 70. When retracting the device 80, the number of times of friction between the stack blade 81 and the notch 34 can be made only once for each stack of the flat tube fins 30. Conventionally, the stack blade 81 and the notch 34 are used three times when ascending from the standby position to the receiving height position, when descending from the receiving height position to the standby position, and when descending the fin receiving portion by one fin. Since a frictional force acts between the two, the number of times this frictional force acts (cumulative frictional distance between the stack blade 81 and the notch 34) can be reduced to one-third. This makes it possible to prevent the notch 34 from being deformed or scratched when the flat tube fin 30 is laminated on the stacking device 80.

Further, as shown in FIG. 13, the motion control unit 90 raises the fin receiving unit 83 by driving the first moving mechanism 84, and the flat tube fins located at the uppermost portions of the laminated flat tube fins 30. A process of bringing the upper surface of the 30 into contact with the lower surface of each holding body 71 (stacking alignment process; seventh process) may be performed. Due to such an operation, even if the flat tube fins 30 laminated on the fin receiving portion 83 are slightly tilted and the laminated state is not preferable, between the fin receiving portion 83 and each holding body 71. The upper surface and the lower surface of the laminated flat tube fins 30 are pressed, so that a neatly aligned laminated state can be obtained.

Then, after the upper surface of the laminated flat tube fins 30 is brought into contact with the lower surface of the holding body 71, the motion control unit 90 operates the first moving mechanism 84 to lower the fin receiving portion 83. The position where the fin receiving portion 83 is lowered is the position where the next flat tube fin 30 is delivered.

After the series of operations described above is repeatedly executed until the number of flat tube fins 30 stacked on the stack device 80 reaches a predetermined number, the stack blade 81 remains inserted in the cutout portion 34. You may move to the next step in the state. The stacking of the flat tube fins 30 can be resumed by mounting an empty stack pin holder 82 on which a plurality of stack blades 81 are erected on the pallet.

In the above-described embodiment, the embodiment in which the raw metal thin plate 41 is provided with the inter-row slit device 52 for manufacturing a plurality of flat tube fins 30 in parallel in the width direction has been described. However, when a 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 may be omitted. Further, when a plurality of flat tube fins 30 are simultaneously manufactured in the width direction of the thin plate 41 as in the embodiment described above, as many flat tube fins as possible are provided in order to maintain the left-right balance of the mold. It is preferable that 30 is arranged in the width direction of one thin plate, and a set is provided so that the cutout portions 34 face each other.

Further, in the above-described embodiment, the holding body 71 having a U-shaped cross section is described, but the holding body 71 has a bottom surface and a side surface as recesses 74 recessed outward in the width direction at least. However, specifically, the configuration of the holding body 71 formed in an L-shaped cross section or a C-shaped cross section may be adopted.

Further, the above-mentioned holding body 71 describes a form continuous in the feeding direction of the metal strip-shaped body 49, but a plurality of holding bodies 71 formed to a required length along the length direction of the flat tube fin 30. May be arranged in a state of being spaced apart from each other. If the stack blade 81 and the regulation pin 94 are arranged so as to enter the disposition interval portion between the holding bodies 71, the regulation pin 94 can be prevented from interfering with the holding body 71.

Further, in the above embodiment, the fluid cylinder 72 is adopted as the contact / detachment means of the holding body 71, but the configuration of the fluid cylinder 72 is not particularly limited as long as the holding body 71 can be moved. Further, a mode in which a servomotor and a ball screw connected to an output shaft of the servomotor via a timing pulley and a timing belt are adopted as the first moving mechanism 84 and the second moving mechanism 85 has been described. However, the first moving mechanism 84 and the second moving mechanism 85 are not limited to the above-described configuration.

Further, it is also possible to adopt the form of the fin manufacturing apparatus 100 for a flat tube in which various modifications described in the present specification are appropriately combined.

Claims (9)

In a manufacturing apparatus for manufacturing a fin for a flat tube in which a notch for inserting a flat tube for a heat exchanger is formed from one side to the other in the width direction.
A press device provided with a die device that forms a notch in a thin unprocessed metal plate to form a metal strip.
An inter-row slit device that cuts a metal strip having a notch formed into a predetermined width and arranges a plurality of metal strips in the width direction to form a metal strip having a product width.
A cut-off device that cuts a metal strip of product width to a predetermined length and uses it as a fin for the flat tube.
It is provided for each of a plurality of product-width metal strips formed by the inter-row slit device, sent out in the transport direction, passed through the cutoff device, and protruded from the downstream side of the cutoff device in the transport direction. The metal strips of the product width and the holding positions of the metal strips of the product width can be contacted and separated from each other, and the metal strips of the product width and the fins for the flat tube. A holding device having a pair of holding bodies for holding the pair of holding bodies and a holding body contacting / separating mechanism for moving the pair of holding bodies in contact with each other.
A plurality of stack pins inserted into the notch portion of the flat tube fin held by the holding device in order to stack the flat tube fins cut to a predetermined length by the cutoff device. The erected stack pin holder, the fin receiving portion that abuts on the lower surface of the flat tube fin at the bottom of the plurality of flat tube fins inserted through the stack pin, and the fin receiving portion. A stack having a first moving mechanism for moving along the stack pin and a second moving mechanism for moving the stack pin holder along the vertical direction of the stack pin independently of the movement of the fin receiving portion. With the device
It includes at least the cutoff device, the holding device, and an operation control unit that controls the operation of the stack device.
The motion control unit
When the pair of holding bodies are in a holding position capable of holding the metal strip having the product width, the first moving mechanism is operated to move the fin receiving portion to the stacking start reference height position. The first treatment to raise and
The first moving mechanism and the second moving mechanism were synchronized by the time the metal strip of the product width held by the pair of holding bodies was cut into the fins for the flat tube by the cutoff device. By operating the fin receiving portion and the stack pin holder in each state, the fin receiving portion and the stack pin holder are raised to the receiving height position of the flat tube fin while maintaining the positional relationship between the fin receiving portion and the stack pin holder. The second process to make
When the fin receiving portion for the flat tube, which has been cut to a predetermined size by the cutoff device, is received by the fin receiving portion, the third process of operating the holding body contact / detaching mechanism to separate the pair of holding bodies. ,
After the flat tube fins are delivered from the pair of holding bodies to the fin receiving portion, the flat tube fins are operated by operating the first moving mechanism and the second moving mechanism in a synchronized state. The tip of the stack pin is from the pair of holders while maintaining the positional relationship between the fin receiver and the stack pin holder. The fourth process of lowering the flat tube fin to a position lower than the delivery height position, and
The fifth process of operating the first moving mechanism to lower the fin receiving portion at a preset height, and
A fin manufacturing device for flat tubes, each of which is characterized by performing. The apparatus for manufacturing a fin for a flat tube according to claim 1, wherein the preset height is a thickness dimension of the fin for a flat tube cut to the predetermined dimension. The motion control unit
The sixth process according to claim 1 or 2, wherein after the fifth process is executed, the sixth process of operating the holding body contact / detachment mechanism to return the pair of holding bodies to the holdingable position is executed. Fin manufacturing equipment for flat tubes. The motion control unit
The production of a fin for a flat tube according to claim 3, wherein after the sixth treatment is executed, the process returns to the second treatment and the second treatment to the sixth treatment are repeatedly executed a predetermined number of times. Device. The motion control unit
The plurality of the flat tube fins inserted through the stack pin and laminated are raised, and the upper surface of the uppermost surface of the flat tube fins among the plurality of laminated flat tube fins is the pair. Claims 1 to 4 are characterized in that at least a seventh process of abutting the lower surface of the holder and activating at least the first moving mechanism so as to align the plurality of stacked fins for the flat tube is performed. The apparatus for manufacturing fins for flat tubes according to any one of the above. The flat tube according to any one of claims 1 to 5, wherein the height position of the upper end of the stack pin is formed so as to gradually decrease as the distance from the side of the cutoff device increases. Fin manufacturing equipment. The stack device is
It is provided at a required distance from the side surface position of the metal strip of the product width or in contact with the side surface position of the metal strip of the product width to regulate the deviation of the metal strip of the product width in the width direction. The apparatus for manufacturing a fin for a flat tube according to any one of claims 1 to 6, further comprising a regulating pin that is movable in the vertical direction. The manufacturing of a fin for a flat tube according to claim 7, wherein the holding device is provided with a regulation pin avoiding portion for preventing interference with the regulation pin rising toward the holding device. Device. The apparatus for manufacturing a fin for a flat tube according to claim 7, wherein the vertical operation of the regulation pin is synchronized with the vertical operation of the stack pin.

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