JP2006136905A - Apparatus for manufacturing fin and offset fin manufactured with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing apparatus of fins with which the defects by pressing are not generated over the whole of the offset fin and an offset fin which is manufactured with the same. <P>SOLUTION: In the fin manufacturing apparatus for manufacturing offset fins 10 the cross section of which is made into a crank shape and which are zigzag offset in the direction vertical to the direction in which the projecting and recessed parts of a crank are continued, this apparatus is provided with a first forming part 101 in which a planar material 11 is made into a cranked material 12 having a crank-shaped cross section with a pair of first rollers 110 and a second forming part 102 which has a pair of dies 120 and an offset material 13 on which the projecting and recessed parts are zigzag offset is formed by coincidentally fitting the crank material 12 coinciding into one side 122 of the dies 120 and engaging with the other side 121 of the dies 120. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fin manufacturing apparatus for manufacturing offset fins used in a heat exchanger such as an oil cooler, and offset fins manufactured thereby.

  Conventionally, for example, as shown in Patent Document 1, a fin manufacturing apparatus (manufacturing method) for an offset fin (corrugated plate in Patent Document 1) is known. An offset fin is a fin having a cross section of a crank shape (rectangular wave shape) and crank irregularities offset in a zigzag manner in a direction perpendicular to the continuous direction.

  The fin manufacturing method using this apparatus is to first form a corrugated corrugated sheet having the same pitch as that of the final shape offset fin from a flat plate by roller processing, The corrugated sheet is pressed with a mold having an equal-shaped mold surface to obtain an offset fin having a final shape.

As a result, the amount of deformation of the corrugated sheet during pressing is kept small, and an offset fin without breakage at the corner can be manufactured.
Japanese Patent Laid-Open No. 01-321024

  However, although the corrugated plate has the same pitch as the final shape of the offset fin, the corrugated plate is not shaped to fit into either the upper mold or the lower mold of the mold. Therefore, the corrugated sheet is crushed from above and below in the process of meshing the upper mold and the lower mold, and is deformed and sheared at the same time, so that the shape is changed to the crank uneven shape and offset shape. At this time, since there is no guarantee that the material of each wave mountain will be deformed in exactly the same process, a certain mountain will have a large amount of material pulling and `` wrinkles '' will occur, and a certain mountain will have a material pulling amount. In some cases, the “material thickness decrease” may occur.

  In view of the above problems, an object of the present invention is to provide a fin manufacturing apparatus that does not cause press defects over the entire offset fin and an offset fin manufactured thereby.

  In order to achieve the above object, the present invention employs the following technical means.

  The invention according to claim 1 is a fin manufacturing apparatus that manufactures offset fins (10) having a crank-like cross section and the crank irregularities being offset in a staggered manner in a direction perpendicular to the continuous direction. A first molding part (101) that is molded from a flat plate material (11) into a crank material (12) having a cross section in a crank shape by a pair of first rollers (110), and a pair of molds (120). The crank material (12) is fitted into one of the molds (120) (122), and the other (121) of the mold (120) is engaged so that the unevenness is offset in a staggered manner. It has the 2nd shaping | molding part (102) which shape | molds a material (13), It is characterized by the above-mentioned.

  Thereby, the crank material (12) molded by the first molding part (101) is restrained by the mold (120) of the second molding part (102), and offset molding is performed in the second molding part (102). In the unevenness of the crank material (12), there is no portion with a large amount of material drawn or a portion with a small amount of material, so that an offset fin (10) having no press defects is manufactured throughout. Can do.

  By the way, conventionally, in the roller processing using the first roller (110), the material may be wound around either of the rollers (110). There was a problem that the material bites into the mold (120) and the molded offset fin (10) cannot be easily removed from the mold.

  Therefore, in the invention described in claim 2, the first molding part (101) and the second molding part (102) include the crank material (12) and the offset material (13) as the first roller (110) and the mold. It is characterized in that biting prevention means (131, 132) for preventing biting into (120) is provided.

  Thereby, it is possible to prevent the crank material (12) and the offset material (13) from being caught in the first roller (110) and the mold (120), eliminating the molding loss associated with the biting and improving the productivity. be able to.

  Specifically, the biting prevention means (131, 132) is provided so as to sandwich the front and back surfaces along the crank material (12) and the offset material (13) as in the invention described in claim 3. The plate-shaped guide members (131, 132) are provided, and the first roller (110) and the die (120) are provided with grooves (113, 123) for the guide members (131, 132). can do.

  The invention according to claim 4 is characterized in that the mold (120) continuously forms the crank material (12) from the first roller (110) into the offset material (13).

  Thereby, high-speed molding of the offset fin (10) using the first roller (110) as a material conveyance source is possible.

  About the metal mold | die (120) in a 2nd shaping | molding part (102), like the invention of Claim 5, it can be set as the upper-lower mold | type (120) or the 2nd roller (120A).

  In the invention according to claim 5, in the invention according to claim 6, the mold (120) is composed of the second roller (120A), and the second roller (120A) is the first roller (120A). 110) is continuously formed into an offset material (13). Between the first roller (110) and the second roller (120A), the crank material ( 12) is provided with a roller portion (120B) that fits one side (122A) of the second roller (120A).

  Thereby, normally, when the crank member (12) enters the second roller (120A), it is possible to prevent the teeth of the roller from interfering with the crank member (12) with rotation.

  Further, in the invention according to claim 5, in the invention according to claim 7, the mold (120) is composed of the second roller (120A), and one of the first rollers (110) (112 ) And one of the second rollers (120A) (122A) are shared with each other.

  As a result, the number of rollers can be reduced, and an inexpensive response can be achieved.

  The invention according to claim 8 is an offset fin formed by the fin manufacturing apparatus (100) according to claims 3 to 7, at a position corresponding to the biting prevention means (131, 132). An offset fin (10) suitable for the fin manufacturing apparatus (100) according to claims 3 to 7 is provided.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description mentioned later.

(First embodiment)
The fin manufacturing apparatus 100 and the offset fin 10 in 1st Embodiment of this invention are demonstrated below using FIG. 1, FIG. 1 is an external perspective view showing the overall configuration of the fin manufacturing apparatus 100, and FIG. 2 is an external perspective view showing the offset fin 10 in the middle of molding.

  First, the offset fin 10 to be molded by the fin manufacturing apparatus 100 will be briefly described. As shown in FIG. 2 (right side in FIG. 2), the offset fin 10 is disposed in the internal fluid flow path of a heat exchanger such as an oil cooler, for example, to increase the heat transfer area and to produce a turbulent flow effect. It is a fin for a heat exchanger that improves the heat transfer coefficient by exhibiting The offset fin 10 has a crank shape in cross section, and the unevenness is perpendicular to the direction in which the crank irregularities (concave part 12a, convex part 12b) continue (in the width direction of the flat plate 11 described later). It is offset in a staggered pattern.

  In the present invention, since the upper and lower material guides 131 and 132 are provided in the fin manufacturing apparatus 100 described below, an offset non-molded portion (where no offset is formed at a position corresponding to the material guides 131 and 132 of the offset fin 10). 14) (corresponding to a non-molded portion in the present invention).

  Returning to FIG. 1, the fin manufacturing apparatus 100 is an apparatus for forming the offset fin 10, and includes a first forming part 101, a second forming part 102, a belt conveyor 103, and the like. And the 1st shaping | molding part 101, the 2nd shaping | molding part 102, and the belt conveyor 103 are arrange | positioned so that it may rank in series in the direction sent out when the flat plate material 11 is processed with the roller 110 mentioned later.

  The first molding unit 101 has a roller 110 (corresponding to the first roller in the present invention) 110 composed of an upper roller 111 and a lower roller 112. Teeth are formed on the circumferential surfaces of the rollers 111 and 112, and the roller 110 is formed into a concavo-convex portion that is continuous with the flat plate material 11 to form a crank material 12 having a crank-shaped cross section. Here, the circumferential width and radial height of the teeth of the lower roller 112 are the same as the width (tooth width including offset) and height of the lower mold 122 in the mold 120 described later. Yes.

  Further, between the rollers 111 and 112, thin plate materials (plate thickness of 0.5 to 1 mm level) are formed so as to sandwich the front and back surfaces at the end portions in the width direction of the flat plate material 11 and the crank material 12. An upper material guide 131 and a lower material guide 132 extending in the direction in which the unevenness is formed are provided. The material guides 131 and 132 correspond to the guide member and the biting prevention means in the present invention. Each of the rollers 111 and 112 is provided with a groove 113 for avoiding the material guides 131 and 132.

  The second molding part 102 has a mold (corresponding to the upper and lower molds in the present invention) 120 composed of an upper mold 121 and a lower mold 122 that both slide in the vertical direction. Teeth are formed on the surface of each mold 121, 122 on the crank material 12 side, and the mold 120 is formed into an offset material 13 in which the unevenness of the crank material 12 is offset in the width direction of the material. Yes.

  The material guides 131 and 132 described above are integrally extended from the roller 110 side to the area of the mold 120, and the material guides 131 and 132 are also provided to the molds 121 and 122. For this purpose, a groove 123 is provided.

  The belt conveyor 103 is a conveying means that receives the offset material 13 formed by the mold 120 and conveys it to the next process.

  Next, operation | movement of the fin manufacturing apparatus 100 based on the said structure is demonstrated using FIGS. 3 to 8 are side views showing the state in which the offset fin 10 is molded step by step.

  First, as shown in FIG. 3, the upper mold 121 is slid upward, the lower mold 122 is slid downward, the mold 120 is opened, and the roller 110 is rotated to rotate the flat plate. A crank material 12 having a crank-like cross section is formed from the material 11. At this time, since the both material guides 131 and 132 sandwich the flat plate material 11 and the crank material 12, the crank material 12 discharged from the roller 110 is prevented from being caught in any of the rollers 111 and 112.

  Next, as shown in FIG. 4, the crank material 12 formed by the roller 110 is continuously fed between the molds 120 (between the molds 121 and 122) with the rotation of the roller 110. It will be.

  Next, as shown in FIG. 5, the roller 110 is stopped and the lower mold 122 is slid upward. At this time, the crank member 12 is fitted into the teeth of the lower mold 122 (corresponding to one of the molds 120 in the present invention).

  Next, as shown in FIG. 6, when the upper mold 121 (corresponding to the other mold 120 in the present invention) 121 is slid downward, the upper mold 121 meshes with the lower mold 122, and the unevenness of the crank material 12. Is formed into an offset material 13 that is in an offset state.

  Then, as shown in FIG. 7, the molds 121 and 122 are slid up and down, and the mold 120 is opened again. At this time, since both the material guides 131 and 132 sandwich the crank material 12 and the offset material 13, the offset material 13 discharged from the mold 120 is prevented from being caught in any of the molds 121 and 122. .

  Further, as shown in FIG. 8, by rotating the roller 110, the molding of the crank material 12 is resumed, and by the molding of the crank material 12, the material is fed from the roller 110 and is molded by the mold 120. The offset material 13 reaches the belt conveyor 103 and is conveyed to the next process.

  In the molding step shown in FIG. 6, the offset non-molded portion 14 is molded on the offset material 13 by the groove portion 123 of each mold 121, 122 provided to avoid the material guides 131, 132. become.

  Thus, in the fin manufacturing apparatus 100 of the present invention, the crank material 12 is molded by the first molding unit 101 using the roller 110, and the crank material 12 is fitted into the lower mold 122 by the second molding unit 102. Since the offset material 13 is formed only by performing the unevenness offset processing with the upper die 121, the crank material 12 is restrained by the mold 120, and the amount of material drawn in each unevenness of the crank material 12. Therefore, the offset fin 10 having no press defects can be manufactured.

  Further, since the material guides 131 and 132 are provided in the roller 110 and the mold 120, respectively, the crank material 12 and the offset material 13 can be prevented from being caught in the roller 110 and the mold 120, and the biting can be performed. Productivity can be improved by eliminating the accompanying molding loss. Here, the material guides 131 and 132 can be set by providing the grooves 110 and 123 in the roller 110 and the mold 120, respectively. Further, the offset fin 10 side to be molded is provided with the offset non-molded portion 14 to enable the above-mentioned correspondence.

  In addition, the first molding part 101 and the second molding part 102 are arranged in series so that the crank material 12 from the roller 110 is continuously molded into the offset material 13 by the mold 120. High-speed molding of the offset fin 10 as a material conveyance source is possible.

(Second Embodiment)
A second embodiment of the present invention is shown in FIG. The second embodiment is similar to the first embodiment in that the mold of the second molding unit 102 is a roller composed of an upper roller 121A and a lower roller 122A (as in the first molding unit 101 (second in the present invention). 120A).

  As a result, as in the first embodiment, the rotation and stop of the roller 110 and the opening and closing of the die 120 are not required, and the crank material 12 and the offset material 13 can be continuously formed, and the speed can be further increased. Become.

  As a modification of the second embodiment, as shown in FIG. 10, a roller portion 120B is provided between the roller 110 and the roller 120A, and the crank member 12 is one of the rollers 120A (here, the lower roller 122A). It is good to fit in the side beforehand.

  Thus, when the normal crank material 12 enters the roller 120A, it is possible to prevent the roller teeth from interfering with the crank material 12 as it rotates.

(Third embodiment)
A third embodiment of the present invention is shown in FIG. The third embodiment is different from the second embodiment (FIG. 9) in that a lower roller 112 (corresponding to one of the first rollers in the present invention) 112 and a lower roller 120A (second roller in the present invention). 122A corresponding to one of the rollers). Specifically, the lower roller 112 is eliminated, the upper roller 111 and the lower roller 122A form a roller (first molding unit 101) 110, and the upper roller 121A and the lower roller 122A form a roller (second molding). Part 102) 120A. As a result, the number of rollers (rollers 112) can be reduced and an inexpensive response can be achieved.

(Other embodiments)
The offset non-molded portion (corresponding to the material guides 131 and 132 and the groove portions 113 and 123 in the fin manufacturing apparatus 100) 14 in the offset fin 10 is set according to the width-direction dimension of the material as shown in FIG. For example, when the width dimension of the material becomes large, it may be provided not only at both ends but also at the center.

  In addition, the material guides 131 and 132 are not limited to be integrally formed from the first molding unit 101 side to the second molding unit 102 side, but are provided separately for each molding unit 101 and 102. May be.

  Further, in each of the embodiments described above, the offset material 13 is continuously formed from the crank material 12, but may be divided and formed.

  Moreover, you may provide the process of cut | disconnecting the offset fin 10 to required length between the 2nd shaping | molding part 102 and the belt conveyor 103. FIG.

It is an appearance perspective view showing the whole composition of the fin manufacture device in a 1st embodiment of the present invention. It is an external appearance perspective view which shows the offset fin in the middle of shaping | molding. It is a side view which shows the 1st step in which an offset fin is shape | molded. It is a side view which shows the 2nd step in which an offset fin is shape | molded. It is a side view which shows the 3rd step in which an offset fin is shape | molded. It is a side view which shows the 4th step in which an offset fin is shape | molded. It is a side view which shows the 5th step in which an offset fin is shape | molded. It is a side view which shows the 6th step in which an offset fin is shape | molded. It is an external appearance perspective view which shows the whole structure of the fin manufacturing apparatus in 2nd Embodiment of this invention. It is a side view which shows schematic structure of the fin manufacturing apparatus in the modification 1 of the said 2nd Embodiment. It is an external appearance perspective view which shows the whole structure of the fin manufacturing apparatus in 3rd Embodiment of this invention. It is an external appearance perspective view which shows the offset fin in other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Offset fin 11 Flat plate material 12 Crank material 13 Offset material 14 Offset non-forming part (non-forming part)
DESCRIPTION OF SYMBOLS 100 Fin manufacturing apparatus 101 1st shaping | molding part 102 2nd shaping | molding part 110 Roller (1st roller)
112 Lower roller (one of the first rollers)
113 Groove 120 Mold (Upper / Lower mold)
120A roller (second roller)
120B Roller part 121 Upper mold (the other mold)
122 Lower mold (one of molds)
122A Lower roller (one of the second rollers)
123 Groove 131 Upper material guide (biting prevention means, guide member)
132 Lower material guide (biting prevention means, guide member)

Claims (8)

A fin manufacturing apparatus for manufacturing offset fins (10) having a crank-like cross section, wherein crank irregularities are offset in a staggered manner in a direction perpendicular to the continuous direction;
A first forming part (101) for forming a crank material (12) having a cross section from the flat plate material (11) by a pair of first rollers (110);
It has a pair of molds (120), the crank material (12) fits into one (122) of the mold (120), and the other (121) of the mold (120) meshes. And a second forming part (102) for forming an offset material (13) in which the irregularities are offset in a staggered manner.   In the first molding part (101) and the second molding part (102), the crank material (12) and the offset material (13) are engaged with the first roller (110) and the mold (120). The fin manufacturing apparatus according to claim 1, further comprising a biting prevention means (131, 132) for preventing the jamming. The biting prevention means (131, 132) is a plate-shaped guide member (131, 132) provided so as to sandwich the front and back surfaces along the crank member (12) and the offset member (13). ,
The fin according to claim 2, wherein the first roller (110) and the mold (120) are provided with groove portions (113, 123) for receiving the guide members (131, 132). Manufacturing equipment.   The said metal mold | die (120) shape | molds the said crank material (12) from the said 1st roller (110) continuously to the said offset material (13), The Claim 2 or Claim 3 characterized by the above-mentioned. Fin manufacturing equipment.   The said metal mold | die (120) consists of an up-and-down type | mold (120) or a 2nd roller (120A), The fin manufacturing apparatus in any one of Claims 1-4 characterized by the above-mentioned. The mold (120) is composed of the second roller (120A),
The second roller (120A) is adapted to continuously form the crank material (12) from the first roller (110) into the offset material (13),
Between the first roller (110) and the second roller (120A), a roller portion (120B) for fitting the crank member (12) to one side (122A) of the second roller (120A) The fin manufacturing apparatus according to claim 5, wherein the fin manufacturing apparatus is provided. The mold (120) is composed of the second roller (120A),
The fin manufacturing apparatus according to claim 5, wherein one of the first rollers (110) and one of the second rollers (120A) (122A) are shared with each other. An offset fin formed by the fin manufacturing apparatus (100) according to claims 3 to 7,
The offset fin characterized by having the non-molding portion (14) where the offset is not molded at a position corresponding to the biting prevention means (131, 132).

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