WO2005080018A1 - Corrugate fin producing device and corrugate fin producing method - Google Patents

Abstract

A fin member (10) is formed into a first corrugate shape by a forming roll pair (11a, 11b). After that, the fin apexes of the fin member (10) are pressure-connected to each other by a pitch closing roll pair (12a, 12b) to form the fin member (10) into a corrugate shape, and then the pressure-connected fin apexes of the fin member (10) are separated from each other to form the fin member (10) into a third corrugate shape having a greater fin pitch than the second corrugate shape. Further, the fin apexes of the third corrugate shape of the fin member (10) are pulled from each other by a shape forming roll pair (13a, 13b) to form the fin member (10) into an aimed corrugate shape.

Description

 Specification

 Corrugated fin manufacturing apparatus and corrugated fin manufacturing method

 Technical field

 The present invention relates to a corrugated fin manufacturing apparatus used for a radiator core for heat exchange and the like, and a corrugated fin manufacturing method using the manufacturing apparatus.

 Background art

 [0002] A radiator core such as a heat exchanger uses corrugated fins. In the pitching of corrugated fins, the top (ridge direction) of the fins formed into a corrugated shape by a forming roll is pressed with a block of urethane or the like, and the fins are pitched by the frictional force.

[0003] The fin material formed by the corrugating machine is continuously processed in the order of a pitch stuffing machine, an intermediate stuffing machine, and a pitching machine to adjust the fin pitch (for example, see Japanese Patent Application Laid-Open No. H11147149). Gazette).

 Disclosure of the invention

 [0004] Fin pitching of the fins by the frictional force of the above block is suitable for an aluminum material or the like that requires a small force. However, corrugated fins using a corrugated sheet for a metal carrier as a fin material—stainless steel, etc., require a larger squeezing force for fin pitching than aluminum. Especially for corrugated fins with low fin heights, a larger force fin is required to pack the fins. For this reason, pitching of the fins using stainless steel or the like causes problems such as jumping of the fins and crushing of the fins. This defect makes it difficult to form a fin having a desired shape.

 [0005] In the manufacturing method disclosed in Japanese Patent Application Laid-Open No. 11-147149, the pitch of the fins is reduced by combining a pitch reduction roll with the fins. For this reason, the fin pitch cannot be reduced until the fin tops contact each other. In particular, in the case of a material having a large repulsive force, such as a stainless steel material, the peak returns after molding, which makes it difficult to form a fin having a desired shape.

[0006] The present invention provides a corrugated fin manufacturing apparatus and a corrugated fin manufacturing method for forming a fin having a desired shape in which there is no variation in the shape of the fin after pitch filling. [0007] In order to achieve the above object, a first feature of the present invention provides the following corrugated fin manufacturing apparatus. This manufacturing apparatus includes a pair of forming rolls for forming a continuously conveyed belt-shaped fin member into a first corrugated shape. The manufacturing apparatus presses the fin tops of the fin members discharged from the pair of forming rolls into a second corrugated shape, separates the fin tops of the fin members pressed together, and forms the second corrugated shape. Includes a pair of pitch-filled rolls with a third corrugated shape with a fin pitch wider than the shape. The manufacturing apparatus includes a pair of shape forming rolls for forming the discharged fin members into a target corrugated shape.

[0008] The "fin pitch" is a length between adjacent corrugated peaks of a fin member.

 [0009] The pitch-filled roll pair may have forming teeth for separating the fin tops while holding down the entire fin tops of the fin member formed in the second corrugated shape.

 [0010] The manufacturing apparatus may include a first guide that suppresses skew of the fin member in a thickness direction.

 [0011] The manufacturing apparatus may include a second guide that suppresses skew of the fin member in the width direction.

 [0012] The manufacturing apparatus may include a third guide for separating the fin member from the forming tooth force of each roll pair.

 [0013] A second feature of the present invention provides the following method for manufacturing a corrugated fin. This manufacturing method includes a primary forming step of forming the fin member into a first corrugated shape by the forming roll pair. The manufacturing method is such that between the forming roll pair and the pitch-filled roll pair, the fin tops of the fin members formed into the first corrugated shape are pressed against each other to form a second corrugated shape, and the pitch-filled roll pair is formed. A secondary forming step of separating the pressed fin tops of the fin member from each other to form a third corrugated shape having a wider fin pitch than the second corrugated shape. The manufacturing method includes a tertiary forming step of forming the fin member into a target corrugated shape by the shape forming roll pair.

[0014] In the secondary forming step, the pair of forming rolls is driven to stop the pair of pitch-filled rolls. The mouth may be temporarily blocked. Thereby, the fin tops of the fin member formed into the first corrugated shape are pressed against each other to form the fin member into the second corrugated shape.

 [0015] After the fin member is formed into the second corrugated shape in the secondary forming step, the forming roll pair, the pitch-filling roll pair, and the shape forming roll pair are synchronously driven, so that the fin member is piled one. Then, it may be discharged downstream.

 [0016] The pair of pitch-filled rolls includes a plurality of forming pieces having forming teeth for separating the fin tops at the peaks while holding the fin tops of the fin members formed in the second corrugated shape at the valleys. May be included. The pitch filling roll may include a pair of piece arrangement rolls supporting both ends of the plurality of molding pieces.

 [0017] The pair of piece arrangement rolls may include a piece attachment in which a plurality of protrusions are arranged on one surface along a circumference. This piece attachment is detachably attached to the piece arrangement roll body. The molding piece may have a hole at both ends in the longitudinal direction for engaging with the projection of the piece attachment.

 [0018] The pair of piece arrangement rolls may include a piece attachment in which a plurality of holes are arranged on one surface along a circumference. This piece attachment is detachably attached to the piece arrangement roll body. The molding piece may have, at both ends in the longitudinal direction, protrusions that engage with the holes of the piece attachment.

 [0019] In the molding piece, the thickness of the fin member may be 50 m, and the radius of the fin top may be 0.2-0.35 mm. The width of the peak of the molded tooth is 0.1 mm, the height of the peak is 0.1 mm, the combined height of the peak and the valley is 0.3 mm, and the width of the molded tooth body is 0.5 mm. The radius of the valley may be 0.2 mm.

 According to the present invention, the fin pitch is reduced until the fin tops are pressed against each other by using the fin discharge force of the forming roll pair. As a result, even when a material having a high repulsive force, such as a stainless steel, is used, the fin shape which does not return to the peak after the molding is made uniform. Therefore, corrugated fins having a uniform fin shape after pitch-filling molding are formed into a desired shape.

Brief Description of Drawings FIG. 1 is a schematic configuration diagram of a corrugated fin manufacturing apparatus according to an embodiment.

 FIG. 2 is a partially enlarged view of a forming roll portion.

 FIG. 3 is a partially enlarged view of a pitch filling roll section.

 FIG. 4 is a partially enlarged view of a shape forming roll portion.

 FIG. 5 is an exploded perspective view showing a configuration of a fin guide.

 FIG. 6 is an exploded perspective view showing a configuration of a pitch-packed roll according to Embodiment 2.

 [FIG. 7] FIG. 7 (a) is a front view of the molding piece viewed from one end in the longitudinal direction, and FIG. 7 (b) is a partial side view showing the shape of the end of the molding piece.

 FIG. 8 is a perspective view showing an arrangement of a pitch filling roll according to a second embodiment.

 FIGS. 9 (a) and 9 (b) are explanatory views showing the installation of a pitch-filled roll in a pitch-filled roll holding stand.

 FIG. 10 is a cross-sectional view corresponding to line XX in FIG.

 FIG. 11 is a partial perspective view showing another configuration of a piece attachment and a formed piece.

 BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, a best mode for carrying out a corrugated fin manufacturing apparatus and a corrugated fin manufacturing method according to the present invention will be described.

[0023] First embodiment

 The corrugated fin manufacturing apparatus according to the first embodiment will be described with reference to FIG. Figure

Reference numeral 1 denotes a main part of the manufacturing apparatus, and other parts (for example, a drive mechanism) are omitted!

The production apparatus 100 is roughly divided into a forming roll section 11, a pitch filling roll section 12, and a shaping roll section 13. A supply roller (not shown) around which the belt-shaped fin member 10 is wound is disposed upstream of the forming roll unit 11. The fin member 10 set on the supply roller is pulled out by a force feed roll or the like (not shown), and is continuously fed to the forming roll portion 11.

[0025] The forming roll section 11 includes a pair of upper and lower forming rolls l la and l ib. Each of these forming rolls 1 la and lib has a plurality of forming teeth 1 on its surface as shown in a partially enlarged view of FIG.

10a and 110b. The molded teeth 110a and 110b are fitted at predetermined intervals, and The fin member 10 is supplied between the rolls while rotating. Thereby, the fin member 10 is formed into a corrugated shape as shown in FIG. 2 (hereinafter, referred to as a first corrugated shape). The formed teeth 110a and 110b have a lower fin height than a target fin height and a fin pitch corrugated shape (hereinafter referred to as a target corrugated shape) so that the fin member 10 does not break during molding. It is set so that the pitch of the mountain is widened.

 [0026] The pitch-packing roll unit 12 includes a pair of upper and lower pitch-packing rolls 12a and 12b. These pitch-filled rolls 12a, 12b have formed teeth 120a, 120b on the surface thereof, as shown in the partially enlarged view of FIG. The fin members 10 discharged from the upstream forming roll portion 11 are temporarily blocked at the inlet side of the pitch filling roll portion 12 as shown in FIG. Thus, the fin member 10 has a corrugated shape in which the fin tops are pressed against each other (hereinafter, referred to as a second corrugated shape). In this second corrugated shape, the top of each fin is substantially semicircular. In this state, when the pitch rolls 12a and 12b are driven to rotate in the direction of the arrow, the peaks of the forming teeth 120a and 120b enter between the pressed fin tops, and the valleys separate the fin tops while pressing the fin tops over the entire surface. I do. As a result, the fin tops are separated from each other on the outlet side, so that the fin member 10 has a wider fin pitch than the second corrugated shape and has a corrugated shape (hereinafter, referred to as a third corrugated shape).

 Here, when the fin member is moved while being partially pressed, the fin member 10 may be deformed. In the present embodiment, as shown in FIG. 3, since the fin tops are separated from each other while pressing the fin tops over the entire surface, deformation of the fin member 10 is prevented.

[0028] The shaping roll unit 13 includes a pair of upper and lower shaping rolls 13a and 13b. These shaping rolls 13a, 13b have shaping teeth 130a, 130b on the surface thereof, as shown in the partially enlarged view of FIG. The peaks of the formed teeth 130a and 130b enter between the fin tops of the fin member 10 formed in the third corrugated shape, and pull the fins in the transport direction. That is, the fins having the third corrugated shape at the stage of being discharged from the pitch-packing roll section 12 are pulled between the pitch-packing roll 12 and the forming roll section 13 by synchronously driving the roll sections. The rolls are finally conveyed while being stretched to a pitch substantially equal to the pitch of the forming teeth 130a, 130b of the shape forming rolls 13a, 13b. As a result, the forming roll section 11, the pitch filling roll section 12, and the shape forming roll section 13 are synchronously driven. When one fin is discharged from the pitch filling roll 12, one fin is discharged from the shape forming roll 13. Then, the fin member 10 discharged from the shaping roll portion 13 is formed into a final target corrugated shape by reducing the pulled fin pitch due to the panel restoring force. The shaping rolls 13a, 13b may initially advance by sandwiching two or more third corrugated fins between the shaping teeth 130a, 130b, but when the steady state is reached, the shaping teeth 130a, 130b The fins are sent out one pitch at a time.

 [0029] As described above, the shape forming roll portion 13 uses the elastic region of the fin member 10 to pull the fin pitch so as to be wider than the target value.

Next, the fin guides 14 and 15 will be described.

 [0031] Between the forming roll portion 11 and the pitching roll portion 12, and between the pitching roll portion 12 and the shape forming roll portion 13, skew of the fin member 10 in the thickness direction and the width direction is suppressed. Also, fin guides 14 and 15 for separating the fin member 10 from the forming tooth force formed on the rolls of each part are arranged.

 With reference to FIG. 5, the configuration of the fin guides 14 and 15 will be described. Here, the fin guide 14 disposed between the forming roll unit 11 and the pitch filling roll unit 12 will be described. The basic structure of the fin guide 15 is the same.

 The fin guide 14 includes a plurality of fin holding plates 140 stacked in the width direction of the fin member 10. The fin guide 14 includes a plurality of spring plates 141 stacked between the fin holding plates 140. The fin guide 14 includes fin side pressing plates 142 attached to both ends of the fin member 10 in the width direction.

 The fin holding plate 140 is a guide member for suppressing the fin member 10 from skewing in the vertical direction (thickness direction). The fin holding plates 140 are stacked with every other fin holding plate 141 interposed therebetween. The fin holding plate 140 has two positioning holes 140a penetrating in the stacking direction.

The fin holding plate 140 suppresses the fin member 10 from escaping in the vertical direction when the pitch is packed, particularly between the forming roll 11 and the pitch packing roll 12. This ensures that the fin tops are pressed against each other. The spring plate 141 is a guide member for separating the fin member 10 by the force of the forming teeth 110a, 110b, 120a, and 120b of each roll. The forming teeth of each roll shown in FIG. 5 have a plurality of grooves along the circumference of the roll for fitting with the tip of the spring plate 141. That is, the forming teeth 110a and 110b of the forming rolls lla and lib have four groove portions 11la and 111b at positions where they are fitted with the tip of the spring plate 141. The forming teeth 120a, 120b of the pitch-filling rolls 12a, 12b have four grooves 121a, 121b at positions where they are fitted with the tip of the spring plate 141, respectively. Each spring plate 141 has two positioning holes (not shown) penetrating in the laminating direction.

 [0037] Both ends 141a and 141b in the longitudinal direction of the spring plate 141 converge to one end in the lateral direction as they extend toward the tip. Each of the ends 141a and 141b has an arc-shaped edge from one end to the other in the lateral direction.

 [0038] The arranged spring plate 141 reliably separates the fin member from the forming teeth even when the forming teeth of each roll and the fin member 10 are fixed.

 [0039] The fin side surface holding plate 142 is a guide member for suppressing the skew of the fin member 10 in the lateral direction (width direction), and is disposed at both ends in the width direction of the integrated block. . The fin side surface holding plate 142 has four positioning holes 142a that communicate with the positioning holes formed in each of the fin pressing plate 140 and the spring plate 141.

 [0040] The fin side pressing plate 142 suppresses the fin member 10 from escaping in the left-right direction when performing the pitch filling, particularly between the forming roll 11 and the pitch filling roll 12, so that the tops of the fins are separated from each other. Press firmly.

 As shown in FIG. 5, a fin pressing plate 140 and a spring plate 141 are alternately stacked to form a block. Attach fin side pressing plates 142 to both sides of this block. Further, bolts 143 are passed through four positioning holes and fastened with nuts 144. Thus, the fin guide 14 is completed. The blocks arranged above and below have an internal space (transport path) through which the fin members 10 pass.

 Next, a procedure for manufacturing a corrugated fin using the corrugated fin manufacturing apparatus 100 configured as described above will be described.

First, the forming roll 11a (or other rolls) is lifted upward. flat The fin member 10 is passed to the vicinity of the exit of the shaping roll unit 13. Return the forming roll 11a (or other rolls) to its home position, as shown in FIG. The forming rolls l la and l ib of the forming roll section 11 are driven to rotate in the direction of the arrow. Thereby, as shown in FIG. 2, the fin member 10 is formed into the first corrugated shape (primary forming step). At this time, the rolls of the pitch filling roll section 12 and the shape forming roll section 13 are stopped.

 The portion of the fin member 10 formed in the first corrugated shape eventually reaches the pitch-packing roll section 12 and abuts between the pitch-packing rolls 12a and 12b. Thereafter, when the forming rolls l la and l ib are further driven to rotate, the fin member 10 formed into the first corrugated shape is temporarily blocked at the entrance side of the forming roll portion 11. The tops of the fins are pressed against each other by the fin discharge output from the forming roll portion 11 to form a second corrugated shape (this process is referred to as pitch reduction). At this time, the pitch-filling rolls 12a, 12b may be driven to rotate by a predetermined angle in the direction of the arrow so that the portion of the second corrugated shape meshes with the forming teeth 120a, 120b of the pitch-filling rolls 12a, 12b.

 After that, when the forming rolls l la and l ib are continuously driven to rotate, the second corrugated portion is accumulated between the forming roll portion 11 and the pitch filling roll portion # 2. At the stage where all the fin apexes are pressed against each other between the forming roll section 11 and the pitch filling roll section 12, the forming roll section 11, the pitch filling roll section 12 and the shape forming roll section 13 are synchronously driven, and The fin members 10 are discharged one by one from each roll to the downstream side. After the start of the synchronous drive, it is not necessary to temporarily stop the fin member 10 between the forming roll portion 11 and the pitch filling roll portion 12. One ridge of the first corrugated shape discharged from the forming roll portion 11 is pressed in order between the forming boss portion 11 and the pitch filling roll portion 12, and the ridge is formed into a second corrugated shape.

 As shown in FIG. 3, due to the above-described synchronous drive, the peaks of the forming teeth 120a, 120b of the pitch-packing rolls 12a, 12b enter between the pressed fin tops of the fin member 10, and the valleys are formed. The fin tops are separated from each other while holding the fin tops on the entire surface. Thus, the fin member 10 is formed into a third corrugated shape having a wider fin pitch than the second corrugated shape (secondary forming step).

Subsequently, as shown in FIG. 4, the fin member 10 is formed by forming teeth 130 of the shape forming rolls 13a and 13b. By means of a and 130b, the space between the tops of the fins formed into the third corrugated shape is pulled. It is transported in a state where it is stretched to almost the same pitch as the pitch of the forming teeth 130a, 130b of the shape rolls 13a, 13b. After that, the fin member 10 discharged from the shaping roll portion 13 has a fin pitch elastically reduced, and is formed into a target corrugated shape (a tertiary forming step).

 According to the first embodiment, in the secondary forming step, the fin pitch is reduced using the fin discharge force of the forming roll unit 11 until the fin tops are pressed against each other. As a result, even when a material having a large repulsive force, such as stainless steel, is used, the ridge does not return after the molding, and the fin shape is made uniform. Therefore, a corrugated fin having a uniform fin shape after pitch-filling molding is formed into a desired shape.

 [0049] The manufacturing method disclosed in Japanese Patent Application Laid-Open No. 11-147149 includes four steps of fin molding. Of these, the fins are pulled in a two-step process. On the other hand, in the present embodiment, the shape forming process is reduced by one process, thereby shortening the manufacturing line.

 [0050] The fin pitch filling molding (corrugated plate height> corrugated plate pitch) processing makes the fins denser and increases the material area per volume of the metal carrier. As a result, when the catalyst is used in the same area, the volume is reduced, and the size of the metal carrier can be reduced. The large angle between the flat plate and the corrugated sheet after molding increases the transmission of compression force, omits the drawing process during carrier production, and improves the brazing characteristics by diffusion bonding.

 [0051] The corrugated plate having a large height reduces the number of turns, reduces the number of fillets formed by the flat plate and the corrugated plate per unit area of the carrier material, and reduces the amount of catalyst.

 Second Embodiment

 Next, as a second embodiment, a configuration example will be described in which the forming teeth of the pitch-filled roll are divided-type forming pieces.

 With reference to FIG. 6, the configuration of the pitch-packed roll according to the second embodiment will be described. Hereinafter, the same parts as those in the first embodiment will be described with the same reference numerals. Here, only the configuration characteristic of the second embodiment will be described, and illustration and description of the configuration common to the first embodiment will be appropriately omitted.

[0054] The pitch-packing roll unit according to the present embodiment includes a pitch-packing roll 22a and a pitch-packing roll 22b having the same configuration as this. The following is representative of the pitch roll 22a Will be described.

 [0055] The pitch filling roll 22a includes a pair of piece arrangement rolls 220 and a plurality of forming pieces 240 held between the piece arrangement rolls.

 [0056] The piece arrangement roll 220 includes a shaft 221 supported by a roll holding stand described later.

 The piece arrangement roll 220 includes an attachment support portion 222 to which a piece attachment 223 having a substantially concave cross section is attached. The attachment support 222 includes a groove 222a on one side. The piece attachment 223 inserted in the groove 222a is connected with the bolt 225. Therefore, the piece attachment 223 is easily replaced by removing the bolt 225.

 [0057] The piece attachment 223 has a plurality of convex portions 224 arranged on the one side along the circumference. The number of the protrusions 224 is selected according to the R shape of the fin top to be pitch-filled (hereinafter, appropriately referred to as a fin shape). That is, the pitch at which the forming pieces 240 are arranged is determined from the dimension value of the R-shaped portion of the fin that fits between the tips of the forming pieces 240 and the thickness of the fin member 10, and the number of protrusions 224 arranged on the piece attachment 223 is determined. To determine. The minimum and maximum numbers of the protrusions 224 that can be arranged on the piece attachment 223 are uniquely determined according to the thickness of the fin and the R shape of the fin top, and can be changed within the range.

 Here, the shape of the molding piece 240 will be described. 7A and 7B are explanatory views showing the shape of the molding piece 240. FIG. 7A is a front view when viewed from one end in the longitudinal direction, and FIG. 7B is a partial side view showing the shape of the end. Only the end is shown).

 [0059] The molding piece 240 has molding teeth 241 on one side edge along the longitudinal direction. The molded tooth 241 has a peak portion 241a and a valley portion 241b in the cross-sectional shape. The molding piece 240 has engagement grooves 242 that engage with the piece attachment 223 at both ends in the longitudinal direction. The molding piece 240 has a hole 243 into which the projection 224 of the piece attachment 223 is inserted when the engaging groove 242 engages with the piece attachment 223. The shapes and dimensions of the molding pieces 240 mounted on the piece attachments 223 having the same diameter are all the same regardless of the number of protrusions 224 arranged. Even when the piece attachment 223 is replaced, the molded piece 240 can be used in common.

As an example, when the fin thickness is 20 to 50 μm and the radius of the top of the fin to be pitched is 0.2 to 0.35 mm, the width a of the peak portion 241a of the molded tooth 241 is 0.04— 0.1 mm, height b of peak 241a is 0.1 mm, height c of peak 241a and valley 241b is 0.3 m m, the width d of the molded tooth body is 0.5 mm, and the radius e of the trough 241b is 0.2 mm. That is, by manufacturing the forming piece 240 as described above, the forming piece 240 is used as a common component within the range of the fin thickness of 50 / ζπι and the radius of the top of the fin of 0.2 to 0.35 mm.

[0061] By mounting a predetermined number of forming pieces 240 between the piece arrangement rolls 220 configured as described above, pitch-filled rolls 22a and 22b having a plurality of forming teeth 241 on the roll surface are obtained. The pitch-packing rolls 22a and 22b are arranged as the pitch-packing roll section 22, as shown in FIG. In the present embodiment, the grooves 121a and 121b (FIG. 5) on the roll surface are omitted.

 [0062] The pitch filling rolls 22a and 22b are attached to a pitch filling roll holding stand 200 as shown in FIG. The pitch-packed roll holding stand 200 is installed as the pitch-packed roll section 12 in the corrugated fin manufacturing apparatus 100 shown in FIG.

 [0063] The pitch-filled roll holding stand 200 shown in FIG. 9 includes a stand stand 201 and roll holding stands 202 and 203 installed at both ends thereof. The stand base 201 has positioning keys 201a and 201b on which the portal holding stands 202 and 203 are installed at fixed positions. The roll holding stands 202 and 203 are movable on the stand base 201 in the left and right directions in the figure. The roll holding stands 202 and 203 are fixed by bolts or the like (not shown) in a state where they are brought up to the positions of the positioning keys 201a and 201b. The shafts 221 of the pitch-filled knurls 22a and 22b are rotatably supported by bearings (not shown) provided on the knurling holding stands 202 and 203. Although not shown, each shaft 221 is also provided with driving mechanism power for rotational driving.

[0064] A plurality of forming pieces 240 are mounted on a pair of piece placing rolls 220, and pitch-filling rolls 22a and 22b are assembled. That is, as shown in FIG. 9A, the roll holding stand 203 is fixed at the position of the positioning key 201b. A not-shown hole (243) provided at one end of the forming piece 240 is inserted into a convex portion (224) (not shown) of the piece arranging roll 220 supported above and below the roll holding stand 203. 240 is supported on one side. Next, while moving the roll holding stand 202 in the direction of the arrow, the protrusions 224 of the piece arrangement rolls 220 supported above and below the roll holding stand 202 form holes (not shown) provided at the other end of the forming piece 240. 243) to form a roll. As shown in Fig. 9 (b), Abutment 202 to the position of positioning key 201a and fix it. As another method, one end of the forming piece 240 is inserted into the piece placing rolls 220 supported above and below the roll holding stand 202. Next, while moving the roll holding stand 203 leftward in the drawing, the other end of the forming piece 240 may be inserted into the piece arrangement rolls 220 supported above and below the roll holding stand 203.

 Next, fin pitch filling by the pitch filling rolls 22a and 22b will be described.

 FIG. 10 is a cross-sectional view corresponding to line XX in FIG. 8 (a part of the outline is omitted). The fin member 10 is supplied between the pitch-packing rolls 22a and 22b, is temporarily dammed at the entrance side of the pitch-packing roll 22, and has a second corrugated shape in which the fin tops are pressed against each other. When the pitch filling rolls 22a and 22b are driven to rotate in the direction of the arrow in this state, the peak portions 241a of the molding teeth 241 enter between the pressed fin tops. The valley portion 241b and the valley portion 241b of the adjacent forming tooth 241 separate the fin top portions while holding the fin top portions almost entirely. As a result, the fin tops are separated from each other on the outlet side, and a third corrugated shape having a wider fin pitch than the second corrugated shape is obtained.

 [0067] As described above, the pitch fin rolls 22a and 22b of this example are also packed with the fin pitch until the fin tops are pressed against each other, similarly to the pitch rolls 12a and 12b of the first embodiment. As a result, even when a material having a high repulsive force, such as a stainless steel, is used, the fin shape is uniform without forming a peak after molding. Therefore, a corrugated fin having a uniform fin shape after pitch-filling molding is formed into a desired shape. Since the fin tops are separated from each other while holding almost the entire fin tops between adjacent valleys, the fin member 10 is prevented from being deformed.

 [0068] By the way, in the case of the pitch-packing rolls provided with molding teeth by rolling the roll surface, like the pitch-packing rolls 12a and 12b of the first embodiment, the fin pitch clogging amount in the pitch-packing process. (Compression amount) is always constant. For this reason, if you want to change the fin shape, it is necessary to replace the fin shape with a dedicated pitch-packed roll with forming teeth that match the R shape. For this reason, when manufacturing a plurality of types of fins having different fin shapes, it is necessary to prepare as many pitch-packing rolls as the number of types, which increases the manufacturing cost.

On the other hand, in the pitch filling rolls 22a and 22b of the present embodiment, the piece attachment 223 The pitch between the molding pieces 240 (the fin pitch in the syrup) is changed according to the number of the molding pieces 240 to be mounted on the machine. That is, the number of formed pieces 240 is increased or decreased by exchanging the piece attachment 223. Thereby, the fin pitch filling amount in the pitch filling process is changed. The shaping teeth of the pitch filling rolls 22a and 22b can be freely changed according to the R shape of the top of the fin without preparing a dedicated pitch filling roll according to the fin shape.

 In the present embodiment, a plurality of piece attachments 223 are prepared according to the fin shape. On the other hand, since the piece arrangement roll 220 and the forming piece 240 are used as common parts, the manufacturing cost is reduced as compared with the case where a dedicated pitch-filled roll is manufactured according to the fin shape.

 In this embodiment, the convex portion 224 provided on the piece attachment 223 is inserted into the hole 243 of the formed piece 240. As shown in the partial perspective view of FIG. 11, the projections 244 provided at both ends of the molding piece 240 may be inserted into a plurality of holes 226 provided on one side of the piece attachment 223 (FIG. 11 shows one side). Only the end is shown).

 In each of the above embodiments, the corrugated fin manufacturing apparatus used for the radiator core for heat exchange and the like and the corrugated fin manufacturing method using this manufacturing apparatus have been described. On the other hand, the present invention is not limited to these uses, and may be applied to other industrial products in general using corrugated fins.

 Industrial potential

[0073] The manufacturing apparatus and method of the present invention are used for manufacturing corrugated fins. Corrugated fins are used for heat exchange.

Claims

The scope of the claims  [1] A forming roll pair (l la, l ib) for forming a belt-shaped fin member (10) conveyed continuously into a first corrugated shape;  The forming roll pair (1 la, 1 lb) force The fin tops of the discharged fin members (10) are pressed against each other to form a second corrugated shape, and the pressed fin tops of the fin members (10) are pressed together. A pair of pitch-filled rolls (12a, 12b) which are separated into a third corrugated shape having a wider fin pitch than the second corrugated shape;  A shape forming roll pair (13a, 13b) for forming the fin member (10) discharged from the pitch filling roll pair (12a, 12b) into a target colgate shape;  And a corrugated fin manufacturing apparatus.  [2] The pair of pitch-filled rolls (12a, 12b) are formed by forming teeth (120a, 120b) that separate the fin tops while holding down the fin tops of the fin member (10) formed in the second corrugated shape on the entire surface. 2. The corrugated fin manufacturing apparatus according to claim 1, comprising:  [3] The corrugated fin manufacturing apparatus according to claim 1, further comprising a first guide (140) for suppressing skew of the fin member (10) in a thickness direction.  [4] The corrugated fin manufacturing apparatus according to claim 1, further comprising a second guide (142) for suppressing skew of the fin member (10) in the width direction.  5. The corrugated fin manufacturing apparatus according to claim 1, wherein the forming tooth force of each roll pair also includes a third guide (141) for separating the fin member (10).  [6] a primary forming step of forming the fin member into a first corrugated shape by the forming roll pair (l la, l ib);  Between the pair of forming rolls (l la, l ib) and the pair of pitch-filled rolls (12a, 12b), the fin tops of the fin member (10) formed in the first corrugated shape are pressed into contact with each other. The corrugated shape of the fin member (10) is separated from each other by the pitched roll pair (12a, 12b) to form a third corrugated shape having a wider fin pitch than the second corrugated shape. Secondary molding process, A third forming step of forming the fin member (10) into a target corrugated shape by the shaping roll pair (13a, 13b); And a corrugated fin manufacturing method. [7] In the secondary forming step, the pair of forming rolls (l la, l ib) are driven to stop the pair of pitch clogging rolls, and discharged from the pair of forming rolls (l la, l ib). By temporarily damming the fin member (10) on the inlet side of the pitch-filled roll pair (12a, 12b), the fin tops of the fin member (10) formed into the first corrugated shape are pressed against each other. 7. The method according to claim 6, wherein the fin member is formed into a second corrugated shape.  [8] In the secondary forming step, the fin member (10) is formed into a second corrugated shape, and then the forming roll pair (l la, l ib) and the pitch filling roll pair (12a, 12b) are formed. The corrugated fin manufacturing method according to claim 7, wherein the forming roll pair (13a, 13b) is driven synchronously to discharge the fin members (10) one by one to the downstream side.  [9] The pitch-filled roll pair forms the fin member (10) formed in the second corrugated shape while separating the fin top portions at the crest portion (241a) while holding the fin top portions at the valley portions (241b). The corrugated fin manufacturing apparatus according to claim 1, further comprising a plurality of forming pieces (240) having teeth (241), and a pair of piece placing rolls (220) supporting both ends of the plurality of forming pieces (240).  [10] The pair of piece arrangement rolls (220) includes a piece attachment (223) in which a plurality of protrusions (224) are arranged along the circumference on one side, and the piece attachment (223) is used for the piece arrangement. Roll Removably attached to the body,  10. The corrugated fin manufacturing apparatus according to claim 9, wherein the molding piece (240) has holes (243) at both ends in the longitudinal direction for engaging with the projections (224) of the piece attachment (223).  [11] The pair of piece arrangement rolls (220) includes a piece attachment (223) in which a plurality of holes (226) are arranged along the circumference on one side, and the piece attachment (223) is used for the piece arrangement. Roll Removably attached to the body, The corrugated fin manufacturing apparatus according to claim 9, wherein the molding piece (240) has, at both ends in the longitudinal direction, a projection (244) that engages with the hole (226) of the piece attachment (223). [12] The molding piece (240) has a thickness of the fin member (10) of 50 m, a radius of the fin top of 0.2 to 0.35 mm, and a ridge (241a) of the molding tooth (241). The width is 0.1 mm, the height of the peak (24 la) is 0.1 mm, the total height of the peak (241a) and the valley (241b) is 0.3 mm, and the width of the molded tooth body is 0.3 mm. 10. The corrugated fin manufacturing apparatus according to claim 9, wherein the corrugated fin has a radius of 5 mm and a radius of the valley portion (241b) is 0.2 mm.  [13] a first forming roll (l la, l ib) for forming the fin sheet (10) into a first corrugation;  Stopping while driving the first forming roll, damping the fin sheet sent out by the first forming roll force, and bringing adjacent peaks of the first corrugation into contact with each other to form a second corrugation. On the other hand, a second forming roll (12a, 12b) which is driven in synchronization with the first forming roll to expand the pitch of the second corrugation and form the fin sheet into a third corrugation. ,  A third forming roll (13a, 13b) configured to drive the third corrugation fin sheet (10) into a target corrugation by driving in synchronization with the second roll.  [14] Driving the first roll to form the fin sheet (10) into the first corrugation,  The second forming rolls (12a, 12b) are stopped while the first roll is driven, and the fin sheet sent from the first roll is closed upstream of the second forming roll. The adjacent ridges of the first corrugation are brought into contact with each other to form the fin sheet into a second corrugation,  The first forming roll and the second forming roll are driven synchronously to widen the pitch of the second corrugation to form the fin sheet into a third corrugation, and the second forming roll A third forming roll (13a, 13b) is driven in synchronization with the third corrugation to form the fin sheet of the third corrugation into a target corrugation.