JP6486208B2 - Heat exchanger manufacturing equipment - Google Patents

Description

  The present invention relates to an apparatus for manufacturing a heat exchanger in which fins each having a plurality of tube mounting grooves are mounted one by one on a plurality of flat tubes held in parallel with each other at a predetermined interval.

  As a conventional fin-and-tube heat exchanger manufacturing device using flat tubes, a fin mounting plate with a mechanism that holds the fins and a groove that evades the flat tubes while the side surfaces of the flat tubes are regulated by restraining pins There is one in which fins are attached to a flat tube one by one by a mounting drum that performs a rotational motion with a plurality of (see, for example, Patent Document 1).

JP 2013-59847 A

  In the prior art as described above, since there is a gap between the flat tube and the restraining pin, as the number of inserted fins increases, the opening side of the mounting groove to the flat tube becomes a convex shape. Since the warp of the exchanger occurs and the flat tube tilts between the restraining pins, the pitch between the U-shaped tube mounting groove and the flat tube is shifted, and the fin mounting plate and the flat tube collide, Even if it can be installed, since the fin is installed while forcibly correcting the inclination of the flat tube with the fin mounting plate, a large frictional force is generated between the fin and the flat tube. There has been a problem that the reliability of fin mounting is lowered due to the occurrence of scratches on the flat tube. When installing fins, it is necessary to move the flat tube horizontally in the length direction of the tube to the next fin installation position in order to avoid collision with the already installed fin. There was a problem that the yield was reduced due to deformation such as buckling of the flat tube due to frictional force generated during the period, and damage to the tube surface.

  The present invention has been made to solve the above-described problems, and a heat exchanger manufacturing apparatus capable of suppressing the occurrence of scratches on a flat tube and the occurrence of warpage in a heat exchanger when a fin is mounted. The purpose is to obtain.

The heat exchanger manufacturing apparatus according to the present invention includes a tube holding device having a tube restraining member for juxtaposing a plurality of flat tubes through which a fluid flows inside at a predetermined interval in the minor axis direction, and the juxtaposed tube holding device. The operation of holding the fins having a plurality of tube mounting grooves corresponding to the plurality of tubes in a predetermined posture and sequentially mounting the fins on the outer peripheral surfaces of the plurality of tubes juxtaposed on the tube holding device is configured. And a fin-and-tube heat exchanger manufacturing apparatus provided with a fin mounting mechanism, wherein the tube holding device is a bearing that is erected on both sides of each of the tubes so as to be variably spaced from each other. are those by the tube restraining member comprising a pair of restraining sandwiching both sides of the tube, the tube holding device, the minor axis of the plurality of tubes each A first base having a plurality of comb-shaped fixing portions alternately formed through a gap portion in a direction parallel to the minor axis direction so as to be located on the side, and a plurality of the tubes in the minor axis direction A plurality of fixing portions formed in a comb shape so as to alternately enter the plurality of comb-shaped gap portions located on each other side portion, and the short base with respect to the first base A second base provided so as to be relatively movable in a direction parallel to the radial direction, and a main shaft installed upright apart from each other in the length direction of the tube with respect to each fixing portion of the first base, respectively. And a first restraining member having a plurality of first bearings for locking each side portion of the tube in the short diameter direction, and each fixing portion of the second base in the length direction of the tube. Each of the tubes is attached to a main shaft that is vertically spaced apart. A second restraining member having a plurality of second bearings for locking each other side portion in the radial direction, and a drive device for moving the second base relative to the first base in a direction parallel to the minor axis direction; The height of the main shaft from the fixed portion is higher in the tube in the longitudinal direction than the portion closer to the fin mounting portion by the fin mounting mechanism in the length direction of the tube. It is characterized by being installed .

According to the present invention, a tube holding device for juxtaposing a plurality of flat tubes at a predetermined interval in the minor axis direction is provided on both sides of each of the tubes from a pair of bearings that are variably arranged with respect to each other. The gap in the minor axis direction is held by sandwiching and restraining both side surfaces of the tube by the tube restraining member, so that the gap between the minor axis directions of the tubes can be held with high accuracy, and the bearing and the flat tube The frictional force generated between the tube and the tube can be reduced, making the tube constrained when the fins are attached in the length direction smooth, and suppressing tube deformation, heat exchanger warpage, and scratches on the tube surface. can do. And since the height from the fixed part of the main shaft is higher in the tube length direction than the part closer to the fin mounting part by the fin mounting mechanism part, the manufacturing apparatus can be manufactured easily. Is.

It is a perspective view which shows notionally the principal part of the heat exchanger manufactured with the manufacturing apparatus of the heat exchanger which concerns on Embodiment 1 of this invention. It is a top view which shows notionally the fin in the heat exchanger shown by FIG. It is a side view which shows notionally the principal part of the manufacturing apparatus of the heat exchanger which concerns on Embodiment 1 of this invention. It is a perspective view which shows the tube holding | maintenance apparatus in the manufacturing apparatus of the heat exchanger which concerns on Embodiment 1 of this invention. It is a top view explaining operation | movement of the tube holding apparatus shown by FIG.

Embodiment 1 FIG.
1 is a perspective view conceptually showing a main part of a heat exchanger manufactured by a heat exchanger manufacturing apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a fin in the heat exchanger shown in FIG. FIG. 3 is a side view conceptually showing the principal part of the heat exchanger manufacturing apparatus according to the first embodiment of the present invention, and FIG. 4 is a heat diagram according to the first embodiment of the present invention. It is a perspective view which shows the tube holding | maintenance apparatus in the manufacturing apparatus of an exchanger. In addition, the same code | symbol is attached | subjected and demonstrated to the same or equivalent member and part through each figure. In FIG. 1, a heat exchanger 1 is a fin-and-tube heat exchanger, and includes a flat fin 11 and a flat tube 12. The tube 12 is formed into a flat shape with an oval cross section, and a plurality of tubes (eight in the illustrated example) are arranged side by side in the short diameter direction, and fluid such as water and refrigerant flows through each of the tubes 12.

  As shown in FIG. 2, the fin 11 is provided with a plurality of tube mounting grooves 11 a formed in a substantially U shape with an interval and a number corresponding to the arrangement interval of the tubes 12 in the minor axis direction. The fins 11 are sequentially mounted one by one so as to be inserted from the opening side of the tube mounting groove 11a to a plurality of tubes 12 juxtaposed in a tube holding device to be described later, and a large number of fins 11 are parallel to each other at regular intervals in the thickness direction. The heat exchanger 1 is configured by being laminated, fixed to each other by being fitted to the tube 12 and integrated. Further, as shown in FIG. 2, the fin 11 has a slit 11b formed on a plate surface extending between adjacent tube mounting grooves 11a.

  And on the same surface side of the fin 11, a fin collar (not shown) for bringing the tube 12 and the fin 11 into close contact with each other along the edge of each tube mounting groove 11a rises vertically. Is formed. The slit 11b and the fin collar are formed so as to protrude in the same direction with respect to the surface of the fin 11. The material and thickness of the fin 11 and the shape and number of the slits 11b are not particularly limited. For example, an existing metal thin plate material such as existing aluminum having a thickness of about 0.1 to 0.7 mm. Etc. can be preferably used.

  On the other hand, the fluid such as the refrigerant flows through the tube 12 as described above, but by making the cross section flat, the flow rate of the fluid such as the refrigerant can be increased without increasing the flow resistance. . Thereby, even when the heat exchanger is downsized, it is possible to obtain sufficient performance as a heat exchanger. The fin 11 is formed in a horizontally long shape so as to straddle both ends of the plurality of tubes 12 juxtaposed in the minor axis direction, and the tubes 12 are individually mounted in the respective tube mounting grooves 11a, whereby the plurality of tubes 12 are mounted. It is attached to the outer peripheral surface of.

  As described above, the heat exchanger 1 is configured by stacking a large number of fins 11 attached to the tube 12 in parallel at a predetermined interval. When the heat exchanger 1 configured in this way is configured such that a fluid such as a refrigerant flowing inside each tube 12 in the refrigeration cycle is vaporized by heat exchange with the surrounding air, for example, the tube 12 The atmosphere is cooled by taking heat of evaporation from the surrounding atmosphere passing between the fins 11 of the heat exchanger 1 through the plurality of fins 11. The material of the tube 12 is not particularly limited, and an existing general metal flat tube made of, for example, copper or aluminum can be preferably used. Further, the shape of the inner peripheral surface of the tube 12 is not particularly limited.

Next, the basic configuration and operation of the heat exchanger manufacturing apparatus to which the present invention is applied will be described first with reference to FIG. 3, and then flattened, which is a typical feature of the present invention. A tube holding device having a tube restraining member for juxtaposing a plurality of tubes in the minor axis direction at predetermined intervals will be described with reference to FIGS.
The heat exchanger manufacturing apparatus 2 includes a tube holding device 20 that is a restraining portion that juxtaposes a plurality of tubes 12 and positions them at a predetermined interval, and a fin 11 in which a plurality of tube mounting grooves 11a shown in FIG. 2 are formed. Is held in a predetermined posture and the operation of attaching to the outer peripheral surface of each tube 12 held by the tube holding device 20 is sequentially repeated, and the attachment position of the fin 11 to the tube 12 Is provided with a moving means (not shown) for relatively moving the tube 12 and the fin mounting mechanism 24 in order to sequentially change the length of the tube at predetermined intervals in the tube length direction. In addition, the supply apparatus of the fin 11 with respect to the fin mounting mechanism part 24, the control apparatus which controls operation | movement of the whole apparatus, etc. are abbreviate | omitting illustration.

  As shown in FIG. 3, the fin mounting mechanism 24 includes a drum 241 that rotates around the axis X in the direction of the arrow A, that is, in the clockwise direction in FIG. 3, and a peripheral portion of the drum 241. A plurality of (8 in FIG. 3) fin holding portions 242 installed at a predetermined interval in the circumferential direction of 241 and a cam follower 243 connecting the fin holding portions 242 are provided. Each fin holding portion 242 performs a circular motion around the axis X as the drum 241 rotates. When the fin holding portion 242 reaches the uppermost portion in the vertical direction, one fin supplied from a supply device (not shown) is supplied. The fin 11 is received and held on the fin holding surface 242a, and then, when reaching the bottom in the vertical direction in the figure, the held fin 11 is mounted on the outer peripheral surface of the juxtaposed tubes 12. The fin 11 is held by the fin holding part 242 by, for example, creating a vacuum state on the fin holding surface 242a using air suction.

  The tube 12 as described above is held such that the major axis direction of the cross section is the vertical direction, but the fins 11 are arranged in the length direction of the outer peripheral surface of the tube 12 as in the heat exchanger 1 of FIG. In order to laminate at a predetermined interval, it is necessary to relatively move the tube 12 in the length direction when the mounting position of the fin 11 is used as a reference. The movement of the tube 12 is performed by a moving means (not shown) using an electric motor, for example, in the relationship between the fin 11 to be attached to the tube 12 and the tube 12.

As described above, the drum 241 rotates at a predetermined speed in the clockwise direction indicated by the arrow A. For example, in the case of FIG. 3, the eight fin holding portions 242 are provided every 1/8 rotation of the drum 241. That is, the fins 11 are sequentially attached at predetermined time intervals to the lowermost position of the drum 241 shown in FIG. 3 and mounted on the outer peripheral surface of the tube 12 during the stop period.
The attachment of the fins 11 to the tube 12 in this operation corresponds to the fin attachment step of attaching the fins 11 to the tube 12 one by one. Note that the fin holding portion 242 after the fins are attached to the fins 11 already attached to the tubes 12 when the drum 241 is further turned clockwise by 1/8 in order to attach the next fins 11 to the tubes 12. In order to avoid interference, the cam follower 243 is once rotated counterclockwise by, for example, about 60 degrees, and after the attached fins 11 are swept, the cam follower 243 returns to the original posture.

  Then, the tube 12 to which the fins 11 are mounted moves a distance corresponding to the fin mounting pitch at a predetermined speed in the direction of arrow B and stops again, and then the fins held by the next fin holding part 242 11 is mounted. Therefore, the fin mounting pitch, which is the distance between the fins 11 that are sequentially mounted on the outer peripheral surface of the tube 12 by the fin holding portion 242, is always maintained at a predetermined interval. In the heat exchanger manufacturing apparatus to which the present invention is applied, for example, by changing the moving speed of the tube 12 in the direction of arrow B, changing the rotating speed of the drum 241, or both, The pitch can be set arbitrarily. In addition, the fundamental structure except the tube holding | maintenance apparatus 20 of the fin mounting mechanism part 24 in the manufacturing apparatus of the above heat exchangers can utilize the thing similar to the prior art document 1, for example.

  Next, FIG. 4 shows a tube holding device having a tube restraining member that juxtaposes a plurality of flat tubes, which are characteristic portions of the heat exchanger manufacturing apparatus according to Embodiment 1 of the present invention, at predetermined intervals in the minor axis direction. This will be described with reference to FIG. FIG. 5 is a plan view for explaining the operation of the tube holding device shown in FIG. As shown in FIG. 4, the tube holding device 20 according to the first embodiment includes a first restraining member 3 </ b> A and a second restraining member using bearings provided so that the distance between each side of each tube 12 can be changed. By sandwiching and restraining both side surfaces of the tube 12 by the tube restraining member 3 composed of a pair of members 3B, the intervals in the minor axis direction of the plurality of tubes 12 arranged side by side are maintained.

  Specifically, a plurality of comb-like shapes alternately formed via the gaps D in the direction parallel to the minor axis direction indicated by the arrow C so as to be located on each side of the minor axis direction of the tube 12 A first base 2A having a fixing portion 21; and a first base 2A that is positioned on each other side in the minor axis direction of the tube 12 so as to enter a plurality of gaps D of the first base 2A; 2A includes a second base 2B having a plurality of comb-shaped fixing portions 22 provided so as to be relatively movable in the direction of arrow C with respect to 2A, and the first restraining member 3A is provided on each fixing portion 21 of the first base 2A. On the other hand, it is constituted by a plurality of first bearings 31b that are respectively attached to main shafts 31a that are vertically provided apart from each other in the length direction of the tube 12 and lock one side portion in the short diameter direction of the tube 12; The second restraining member 3B is a fixed part of the second base 2B. 2 is constituted by a plurality of second bearings 32b that are respectively attached to main shafts 32a that are provided upright and spaced apart from each other in the length direction of the tube 12 to lock the other side portions in the short diameter direction of the tube. ing. The tube holding device 20 further includes a drive device (not shown) that moves the second base 2B relative to the first base 2A in a direction parallel to the minor axis direction.

  The first bearing 31b and the second bearing 32b may be the same as each other, and the type of the first bearing 31b and the second bearing 32b is not particularly limited, but as an example of a preferable one, a spindle vertically installed on the fixed portion 21 (22). Examples thereof include a rolling bearing such as a deep groove ball bearing having an outer ring that can rotate smoothly with respect to 31a (32a). Further, the first restraining member 3A constituted by the main shaft 31a and the first bearing 31b and the second restraining member 3B constituted by the main shaft 32a and the second bearing 32b are within the operating range of the fin holding portion 242 shown in FIG. In order to prevent this interference, as shown in FIG. 4, the fins 11 are disposed so as to be inclined with respect to the length direction of the tube 12 so that the tip end side in the mounting direction is lowered. In this example, the height of the main shaft on the front end side in the mounting direction of the fin 11 is made lower than the rear side, and the number of bearings mounted on the main shaft is two on the front end side and three on the rear side. Thus, it is configured to be inclined so that the tip end side is lowered.

  Further, the first restraining member 3A composed of the main shaft 31a and the first bearing 31b standing on the first base 2A is fixed so as to remain at that position. On the other hand, the second restraining member 3B composed of the main shaft 32a and the second bearing 32b fixed to the second base 2B is connected to the second base 2B, for example, an air cylinder and a slide bearing, or As shown by an arrow C in FIG. 4, the second base 2 </ b> B can be moved in a direction parallel to the minor axis direction of the tube 12 by an actuator, not shown, that combines the electric motor and the ball screw. The arrow C1 in FIG. 5B indicates a predetermined number of tubes 12 previously disposed at predetermined intervals in the minor axis direction with respect to the tube holding device 20 when the fins 11 are attached to the tubes 12. In order to fix the tube holding device 20 by the pair of the first bearing 31b of the first restraining member 3A and the second bearing 32b of the second restraining member 3B, which are erected symmetrically on both sides, The direction which moves 2 base 2B is shown.

  Next, the operation of the first embodiment configured as described above will be described. First, before or after the fins 11 are attached, the second base 2B is fixed to the first base 2A on the opposite sides of the tube 12 as shown in FIG. 5A. They are moved so that the distance between them is increased, and the first bearing 31b constituting the first restraining member 3A provided in the fixing portion 21 of the first base 2A and the fixing portion 22 of the second base 2B are provided. The distance from the second bearing 32 b constituting the second restraining member 3 </ b> B is sufficiently wide with respect to the dimension in the minor axis direction of the tube 12, and a predetermined number of tubes 12 before the fins 11 are attached to the tube holding device 20. It is easy to remove the heat exchanger 1 shown in FIG. 1 after mounting or mounting a large number of fins 11 on the outer peripheral surface of a predetermined number of tubes 12 from the tube holding device 20.

  On the other hand, when the fins 11 are mounted, after loading a predetermined number of tubes 12 as shown in FIG. 5A, the second base 2B is illustrated by an actuator (not shown) connected to the second base 2B. The second bearing 32b on the second base 2B is moved in the direction parallel to the minor axis direction of the tube 12 by moving in the direction of the arrow C1 shown in FIG. 5 (b), and is erected on the first base 2A. The tube 12 is sandwiched between the first bearing 31b and the second bearing 32b on the second base 2B, and the first constraining member 3A and the second restraining member 3A each having two first bearings 31b provided symmetrically in the drawing are shown. The tube 12 is restrained from both sides by a pair of second restraining members 3B having bearings 32b.

  When the first bearing 31b and the second bearing 32b are always brought into contact with both side surfaces of the tube 12 at the time of restraint, the interval between the first bearing 31b and the second bearing 32b at the time of restraint is set to the tube 12. It is necessary to make the minimum dimension when considering the variation of the outer dimension in the minor axis direction. In that case, a state occurs in which the outer dimension of the tube 12 in the minor axis direction restrains a portion where the outer dimension of the tube 12 is larger than the interval between the first bearing 31b and the second bearing 32b, but at that time, the tube 12 is elastically deformed, In this state, even if the tube 12 is moved in the longitudinal direction, the first bearing 31b and the second bearing 32b are rotated around the main shaft following the movement, so that the outer peripheral surface of the tube 12 is damaged. The tube 12 constrained can be smoothly fed out to the fin mounting portion without doing so. In the invention, the interval between the first bearing 31b and the second bearing 32b when the tube 12 is restrained does not necessarily require that the side surface of the tube 12 is always in contact. In this manner, the plurality of tubes 12 juxtaposed to the tube holding device 20 are restrained from both sides by the pair of the first restraining member 3A and the second restraining member 3B, so that the shortness is achieved regardless of the amount of lamination of the fins 11. Spacing is maintained with high accuracy in the radial direction.

  For this reason, since the curvature of the tube 12 and the heat exchanger 1 which generate | occur | produces as the number of sheets by which the fin 11 is laminated | stacked by the predetermined space | interval in the fin mounting process shown in FIG. The reliability of mounting the fins 11 to the tube 12 by the rotational movement of is improved. Further, by suppressing the warpage of the tube 12 and the heat exchanger 1, the frictional force generated between the fin 11 and the tube 12 when the fin is mounted is reduced, and the generation and deformation of the tube 12 are suppressed. In both cases, since the mounting force of the fins 11 is also reduced, it is possible to reduce the size and energy of the apparatus. Furthermore, when horizontally moving the tube 12 in the length direction when the fin is mounted, the frictional force generated between the tube 12 and the first bearing 31b and the second bearing 32b is greatly reduced. Generation | occurrence | production of the damage | wound to the tube 12 or deformation | transformation, such as buckling, is suppressed.

  As described above, in the first embodiment, as the tube holding device 20 in which the plurality of flat tubes 12 are juxtaposed at a predetermined interval in the minor axis direction, the mutual intervals are variable. The tube 12 is sandwiched by the fin restraining member 3 composed of a pair of the first restraining member 3A and the second restraining member 3B using the bearing provided on the first bearing 31b and the second bearing 31b on both side surfaces in the major axis direction of the tube 12. The bearings 32b are brought into contact with each other so that each tube 12 is regulated in the minor axis direction. For this purpose, the first restraining member 3A is configured by using a total of two first bearings 31b having different heights, which are spaced from each other in the length direction of the tube 12 and fixed to each fixing portion 21 of the first base 2A. The second restraining member 3B is symmetrical to the first restraining member 3A by using a total of two second bearings 32b having different heights, which are provided to stand on the fixing portion 22 of the second base 2B so as to be spaced apart in the length direction of the tube 12. It is structured.

According to the first embodiment as described above, the plurality of tubes 12 can be regulated with high accuracy at a predetermined interval, and heat exchange is generated as the number of fins 11 stacked on the tube 12 at a predetermined interval increases. Since the warpage of the vessel 1 can be suppressed, the reliability of mounting the fin 11 to the tube 12 by the rotational movement of the fin mounting mechanism 24 can be enhanced. Further, since the distance between the first restraining member 3A and the second restraining member 3B can be changed by the movement amount of the second base 2B relative to the first base 2A, it is possible to easily cope with the change in the size of the tube 12.
Moreover, since the curvature of the heat exchanger 1 which generate | occur | produces at the time of fin lamination | stacking can be suppressed, the frictional force which generate | occur | produces between the fin 11 at the time of fin mounting and the tube 12 can be reduced, and generation | occurrence | production and deformation | transformation of the tube 12 can be suppressed. In both cases, since the mounting force of the fins 11 can be reduced, the apparatus can be reduced in size and energy can be saved.

Further, in order to avoid a collision with a mounted fin when the fin is mounted, even when the tube 12 is horizontally moved in the length direction as indicated by an arrow B in FIG. Since the friction force generated between the tube 12 and the first restraining member 3A and the second restraining member 3B can be greatly reduced by rotating the 31b and the second bearing 32b, the occurrence of scratches on the flat tube 12, Deformation such as buckling can be suppressed.
Further, in order to configure the height of the main shaft 31a (32a) from the fixed portion 21 (22) so that the one closer to the fin 12 in the length direction of the tube 12 is lower than the one far from the mounting portion of the fin 11, Since the adjustment is made according to the number of the first bearings 31b (second bearings 32b) attached to the main shaft 31a (32a), the manufacturing apparatus can be easily manufactured.

In the first embodiment, a pair of first bearings 31b constituting the first restraining member 3A and a pair of second bearings 32b constituting the second restraining member 3B are provided symmetrically. However, the present invention is not necessarily limited thereto, and for example, the number of bearings may be arranged in a set of three on one side. Further, for example, it may be asymmetrical, for example, by arranging partly in a staggered manner, or by changing the number of installed bearings left and right.
Further, the first base 2A is fixed and the second base 2B is moved by the actuator, but the moving member is reversed, or both the first base 2A and the second base 2B are moved in conjunction with each other. It is good also as a structure restrained so that the tube 12 may be pinched | interposed by the tube restraint member 3 from both sides. It goes without saying that various modifications and changes can be made within the scope of the present invention.

1 heat exchanger, 11 fin, 11a tube mounting groove, 11b slit,
12 tube, 2 heat exchanger manufacturing apparatus, 2A first base, 2B second base,
20 tube holding device, 21 fixing part, 22 fixing part, 24 fin mounting mechanism part,
241 drum, 242 fin holding part, 242a fin holding surface,
243 cam follower, 3 tube restraint member, 3A first restraint member,
3B 2nd restraint member, 31a spindle, 31b 1st bearing, 32a spindle,
32b 2nd bearing, D clearance part.

Claims (3)

A tube holding device having a tube restraining member for juxtaposing a plurality of flat tubes through which fluid flows inside at a predetermined interval in the minor axis direction, and a plurality of tube mounting grooves corresponding to the plurality of juxtaposed tubes A fin-and-tube comprising: a fin mounting mechanism configured to sequentially repeat an operation of holding a fin having a predetermined posture and mounting the fin on the outer peripheral surface of the plurality of tubes juxtaposed to the tube holding device A heat exchanger manufacturing apparatus of the above type, wherein the tube holding device is provided on both sides of each tube by a tube restraining member comprising a pair of bearings standing upright on both sides of each tube. is intended to pinch constraining surfaces, the tube holding device, and the minor axis to be positioned on each one side of the minor axis of the plurality of tubes A first base having a plurality of comb-shaped fixing portions alternately formed through gaps in a row direction, and the comb-tooth shape positioned on each other side in the minor axis direction of the plurality of tubes A plurality of fixed portions formed in a comb shape so as to alternately enter the plurality of gap portions, and provided so as to be relatively movable with respect to the first base in a direction parallel to the minor axis direction. The second base and the fixed portions of the first base are respectively attached to main shafts that are spaced apart from each other in the length direction of the tube, and each one side in the short-diameter direction of the tube. A first restraining member having a plurality of first bearings for locking the portion, and a main shaft that is erected apart from each other in the length direction of the tube with respect to each fixing portion of the second base. A plurality of first portions for locking the other side portions of the tube in the minor axis direction. A second restraining member having a bearing, and a drive device for moving the second base relative to the first base in a direction parallel to the minor axis direction, from the fixed portion of the main shaft. The apparatus for manufacturing a heat exchanger, characterized in that the height is set so that the one farther from the fin mounting portion by the fin mounting mechanism portion in the length direction of the tube is higher than the one closer to the fin mounting portion. . The first bearing or the second bearing, heat according to claim 1, characterized in that a rolling bearing having an outer ring capable of smoothly rotating relative to the main shaft which is erected vertically with respect to the fixed part Exchanger manufacturing equipment. The first bearing or the second bearing, claim 1, characterized in that the mounting number for far the main shaft from the mounting portion of the fin becomes increased than mounting number for said spindle close to the mounting portion of the fin Or the manufacturing apparatus of the heat exchanger of Claim 2 .

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