JP2005262228A - Louver fin forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent any bend of a fin when forming a corrugated sheet, in a louver fin forming device. <P>SOLUTION: A louver fin 10 after forming corrugate is held between a first pressing block 100 and a second pressing block 200, the bend part 11b of the louver fin 10 is pressed against a lower side supporting part 202 corresponding to the second pressing block 200 by an upper side pressing part 101 of the first pressing block 100, and the bend part 11a of the louver fin 10 is pressed against an upper side supporting part 102 corresponding to the first pressing block 100 by a lower side pressing part 201 of the second pressing block 200. The bend part 11a and the bend part 11b of the louver fin 10 are extended to the predetermined length. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apparatus for forming a radiating louver fin used in a heat exchanger, and more particularly to a forming apparatus for correcting the bending of a unidirectional louver fin.

  In radiators and air conditioners mounted on vehicles such as automobiles, heat exchangers such as heater cores, condensers, and evaporators are used. These heat exchangers are configured to perform heat exchange with cooling air via corrugated fins that are formed in a wave shape. In recent years, for the purpose of improving heat dissipation performance, a corrugated fin with a louver (hereinafter referred to as a louver fin) in which a plurality of louvers that are obliquely opened is formed in a flat portion of the fin (a section between the bent portion). ) Has been developed.

  FIG. 10 is a perspective view showing the appearance of a general louver fin. The louver fin 10 is formed in a corrugated shape so that the bent portions 11a and the bent portions 11b are alternately continued to the strip-shaped thin plate 11, and the flat portion 11c located between the bent portions 11a and 11b has an opening direction. A plurality of louvers 12 are formed in the width direction.

  The louver fin 10 is divided into a two-way louver fin and a one-way louver fin according to the arrangement of the louvers 12 in the flat portion 11c. The louver arrangement in the two-way louver fin is shown in FIG. FIG. 11 is a cross-sectional view of the two-way louver fin shown in FIG. 10 cut in the width direction. In the two-way louver fin 10A, louvers 12a and 12b formed on one flat portion 11c are formed symmetrically with respect to each other so that the opening direction is opposite on both sides of the central portion C1. FIG. 12 shows a louver arrangement in the unidirectional louver fin. FIG. 12 is a cross-sectional view when a unidirectional louver fin (not shown) is cut in the width direction. In the unidirectional louver fin 10B, the opening directions of the louvers 12 are all formed in the same direction on the entire surface of one flat portion 11c. The one-way louver fin has advantages such as higher heat dissipation performance and lower ventilation resistance than the two-way louver fin. However, this unidirectional louver fin 10B has no symmetry plane in the width direction, so that distortion and stress generated by cutting and raising the louver 12 during corrugating are not balanced, and the amount of material elongation is not equal on the left and right. After molding, there is a problem in that it bends as shown in FIG. 13 and the assembly to the heat exchanger core cannot be automated. The direction of bending differs depending on the forming direction and the opening direction of the cutting and raising blade.

  Incidentally, in the two-way louver fin 10A, since distortion and stress generated during corrugation molding are balanced at the central portion C1, the amount of material elongation is equal on the left and right, and the fin does not bend after molding.

As a conventional technique for preventing bending after forming in such a unidirectional louver fin, one in which an edge of a band-shaped metal plate is bent to increase rigidity and the fin is not bent after forming is known (for example, Patent Document 1).
JP 2003-83691 A

  In the thing proposed by the said Unexamined-Japanese-Patent No. 2003-83691, since the fin width has to be made wide by the amount of bending, a material yield will worsen. For such a problem, there is a need for a technique for correcting fin bending after corrugation molding or during corrugation molding without deteriorating the material yield.

  The objective of this invention is providing the shaping | molding apparatus of the louver fin which can correct | amend the bending of the fin after corrugation reliably.

  Another object of the present invention is to provide a louver fin molding device that can prevent fin bending during corrugated molding.

  In order to achieve the above object, the invention according to claim 1 is directed to a corrugated shape in which a first bent portion and a second bent portion are alternately formed on a strip-shaped thin plate, and the first bent portion and the second bent portion are formed. A louver fin forming apparatus comprising a plurality of louvers cut and raised along a length direction of the strip-shaped thin plate in a flat portion located between the strip-shaped thin plates in the width direction, and an upper surface of the louver fin The upper surface side pressing portion that presses the inner side of the second bent portion from the side and the upper surface side support portion that supports the outer side of the first bent portion pressed from the lower surface side of the louver fin are alternately arranged. A pressing block, a lower surface side pressing portion that presses the inside of the first bent portion from the lower surface side of the louver fin, and a lower surface side support that supports the outside of the second bent portion pressed from the upper surface side of the louver fin. Alternately A second pressing block, the louver fin being sandwiched between the first pressing block and the second pressing block, and a second bending of the louver fin by the upper surface side pressing portion of the first pressing block. And presses the first bent portion of the louver fin to the corresponding upper surface support portion of the first pressing block by the lower surface side pressing portion of the second pressing block. The louver fin forming apparatus is characterized in that the first bent portion and the second bent portion of the louver fin are extended to a predetermined length.

  According to a second aspect of the present invention, in the first aspect, at least one of the upper surface side support portion of the first pressing block and the lower surface side support portion of the second pressure block is configured by an elastic body.

  According to a third aspect of the present invention, in the first aspect, at least one of the upper surface side support portion of the first pressure block and the lower surface side support portion of the second pressure block is in contact with the first or second bent portion. A hard member and an elastic support body that presses and supports the hard member in one direction are provided.

  Invention of Claim 4 moves the said 1st press block to the said 2nd press block side in any one of Claim 1 thru | or 3, and the said upper surface side press part of the said 1st press block WHEREIN: A first pressing means for pressing the second bent portion of the louver fin against the corresponding lower surface support portion of the second pressing block; and the second pressing block is moved in parallel to the first pressing block side, and the second pressing block And a second pressing means for pressing the first bent portion of the louver fin against the corresponding upper surface support portion of the first pressing block by the lower surface side pressing portion of the block.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, in the fourth aspect, the first pressing means that reciprocates the first pressing means in the molding direction, and the second pressing means that reciprocates in the molding direction in conjunction with the first conveying means. And a second transport means.

  According to a sixth aspect of the present invention, a flat portion positioned between the first bent portion and the second bent portion is formed by alternately forming the first bent portion and the second bent portion on the belt-like thin plate. A louver fin forming apparatus in which a plurality of louvers cut and raised along the length direction of the strip-shaped thin plate are formed in the width direction of the strip-shaped thin plate, and the outer surface of the first strip-shaped member that moves endlessly, The upper surface side pressing portion that presses the inner side of the second bent portion from the upper surface side of the louver fin and the upper surface side support portion that supports the outer side of the first bent portion pressed from the lower surface side of the louver fin are alternately arranged. From the lower surface side pressing portion that presses the inner side of the first bent portion from the lower surface side of the louver fin to the outer surface of the arranged first pressing moving portion, the second endless member that moves endlessly, and from the upper surface side of the louver fin Of the pressed second bent portion A second pressing and moving portion alternately arranged on the lower surface side supporting portions that support the side, and the first pressing and moving portion is connected to the first bent portion side of the louver fin and the second pressing portion. The second bent portion of the louver fin is arranged by the upper surface side pressing portion of the first pressing moving portion by arranging the first and second belt-like members in an endless manner in synchronization with each other. While pressing the corresponding lower surface support portion of the second press moving portion, the lower surface side pressing portion of the second press moving portion causes the first bent portion of the louver fin to correspond to the upper surface corresponding to the first press moving portion. The first bent portion and the second bent portion of the louver fin are extended to a predetermined length by pressing against the support portion.

  According to a seventh aspect of the present invention, in the sixth aspect, the first strip member is stretched between two rolls arranged along the molding direction, and the second strip member is arranged along the molding direction. A pressing member that is stretched between two rolls and presses the first pressing movement unit and the second pressing movement unit in the opposite direction, sandwiching the first band-shaped member and the second band-shaped member therebetween. The first press moving part and the second press moving part are endlessly conveyed with respect to the louver fins by opposingly arranged and synchronously driving the rolls, and the first press moving part and the second press moving part. By passing the moving part between the pressing members, the first pressing moving part and the second pressing moving part are pressed in the louver fin direction.

  The invention of claim 8 comprises a pair of cutters in which a plurality of tooth portions are formed along the circumferential direction, and the top and valley of each tooth portion with respect to the strip-shaped thin plate supplied between the pair of cutters. The first bent portion and the second bent portion are alternately formed at predetermined intervals on the strip-shaped thin plate by the portion to form a continuous corrugated shape, and the flat portion located between the first bent portion and the second bent portion A forming cutter for forming a louver fin by cutting and raising a plurality of louvers in a flat portion of the strip-like thin plate by a plurality of cutting and raising blades formed on a side surface of the tooth portion, and at least one of the forming cutters is synchronized with a forming speed And a cutter driving unit that moves up and down toward the other cutter side facing each other, and is arranged at a predetermined interval on the belt-like thin plate by a top portion and a valley portion of each tooth portion formed on each of the pair of cutters. The bent portions and the second bent portions are alternately formed, and the at least one cutter is moved up and down by the cutter driving portion, and the top and valley portions of the tooth portions formed on the cutter are used to form the louver fin. The first bent portion and the second bent portion are extended to a predetermined length.

  The invention according to claim 9 is the shaft drive unit according to claim 8, wherein the cutter driving unit engages with at least one rotating shaft of the forming cutter and drives the rotating shaft up and down at a predetermined interval; The rotary shaft is supported so as to be movable in the vertical direction, and a shaft pressing portion that presses the rotary shaft in one direction is provided.

  According to the first to seventh aspects of the present invention, even when the amount of extension of the material is not equal on the left and right in the molding direction during corrugation molding, only the amount equal to the left and right by the pressing block or the pressing moving portion with respect to the louver fin. Since compulsory stretching is performed, the amount of extension of the material can be substantially uniform on both the left and right sides in the molding direction, and the fin bending after corrugation molding can be reliably corrected.

  Further, according to the invention of claim 8 or 9, even if the amount of extension of the material is not equal on the left and right in the molding direction during corrugation molding, the louver fin is moved up and down by the vertical movement of at least one cutter. Since the forcible stretching is performed by an amount equal to the right and left, the amount of extension of the material can be made substantially uniform on both the left and right sides in the molding direction, thereby preventing fin bending during corrugation molding.

  First, the louver fin manufacturing process will be briefly described. FIG. 9 is an overall configuration diagram showing a louver fin manufacturing process. The strip-shaped thin plate 11 fed out from the roll 20 passes between a pair of cutters 21A and 21B (molding cutter 21) arranged in the vertical direction, and forms bent portions 11a and 11b by corrugated molding and flat portions 11c. Louvers are formed simultaneously. Then, after adjusting the pitch between adjacent bent parts while giving resistance to the feeding of the corrugated part by the pitch adjusting rolls 22A and 22B (pitch adjusting roll 22) and shortening in the length direction, the next cutting blade The louver fin 10 having a length corresponding to the dimension of the heat exchanger core to be assembled is completed by sending the sheet to 23 and cutting it to a predetermined length.

  In the following embodiments, the same parts as those shown in FIGS.

  FIG. 1 is a main part side view showing a press molding process of the louver fin 10 by a first pressing block 100 and a second pressing block 200. FIG. 2 is a side view showing the arrangement of the press forming apparatus 24 according to the first embodiment.

  As shown in FIG. 2, the press molding device 24 is disposed between the molding cutter 21 and the pitch adjusting roll 22. The louver fin 10 that has been corrugated by the forming cutter 21 is corrected in fin bending by a press forming device 24 described later, and is sent to the pitch adjusting roll 22.

  FIG. 3 is a side view showing the configuration of the press molding apparatus 24. The press molding device 24 includes a first press molding portion 24A disposed on the upper surface of the louver fin 10 and a second press molding portion 24B disposed on the lower surface. 24 A of 1st press molding parts move in parallel to the 1st press block 100 which has the several upper piece and lower piece receptacle mentioned later, and this 1st press block 100 to the 2nd press block 200 side of the louver fin 10 lower surface. And a first pressing block moving part 110 for this purpose. Further, the second press molding section 24B moves in parallel to a second pressing block 200 having a plurality of upper and lower frame holders, and the second pressing block 200 toward the first pressing block 100 on the upper surface of the louver fin 10. And a second pressing block moving part 210 for this purpose.

  As shown in FIG. 1, the first pressing block 100 has a structure in which a plurality of upper pieces 101 and lower piece receivers 102 are alternately arranged. The upper piece 101 is an upper surface side pressing portion that presses the inside of the bent portion 11b from the upper surface of the louver fin 10, and the front end portion 101a is formed in a substantially convex shape in cross section. The upper piece 101 is made of a metal material having higher strength than the louver fin 10. The lower piece receiver 102 is an upper surface side support portion that supports the outside of the bent portion 11a pressed from the lower surface side of the louver fin 10, and a flat portion 102a is formed on the louver fin 10 side. The lower piece receiver 102 is formed of a urethane block having a substantially square cross section. However, as the lower piece receiver 102, in addition to urethane, rubber, resin, hard foam, or an elastic body having a function equivalent to these can be used.

  The same applies to the second pressing block 200, and a plurality of lower frames 201 and upper frame receivers 202 are alternately arranged. The lower piece 201 is a lower surface side pressing portion that presses the inside of the bent portion 11a from the lower surface of the louver fin 10, and the distal end portion 201a is formed in a substantially convex shape in cross section. The upper piece receiver 202 is a lower surface side support portion that supports the outside of the bent portion 11b pressed from the upper surface side of the louver fin 10, and a flat portion 202a is formed on the louver fin 10 side. Members constituting the lower piece 201 and the upper piece receiver 202 are the same as the upper piece 101 and the lower piece receiver 102 of the first pressing block 100.

  In the first pressing block 100 and the second pressing block 200, the upper piece 101 of the first pressing block 100 is placed on the upper piece receiver 202 of the second pressing block 200 and the lower piece 201 of the second pressing block 200 is seen in plan view. It arrange | positions so that it may each correspond to the upper frame receptacle 102 of the 1st press block 100. FIG. In addition, the 1st press block 100 and the 2nd press block 200 may be accommodated in the housing which is not shown in figure, and the structure currently fixed with the volt | bolt etc. which penetrate the inside may be sufficient.

  Next, the 1st press block moving part 110 and the 2nd press block moving part 210 are demonstrated. Since the first pressing block moving unit 110 and the second pressing block moving unit 210 have substantially the same configuration, one first pressing block moving unit 110 will be described below as an example.

  As shown in FIG. 3, the first pressing block moving unit 110 is capable of sliding the block supporting shafts 111 and 112 that support both ends of the first pressing block 100 and the block supporting shafts 111 and 112 in the vertical direction. A holding plate 113 that is held in a state and an actuator 114 that is attached to the central portion of the holding plate 113 and moves the first pressing block 100 up and down are configured.

  The actuator 114 is configured to move the first pressing block 100 in parallel in the arrow direction by moving the shaft 115 in the vertical direction by an internal drive motor (not shown). However, the drive mechanism is not limited to being electrically controlled, and may be controlled by hydraulic pressure or the like.

  Next, the bending correction of the louver fin 10 by the press forming apparatus 24 configured as described above will be described with reference to FIGS. In this embodiment, an example in which the louver fin 10 discharged from the forming cutter 21 is temporarily stopped and press-molded will be described. The first pressing block 100 and the second pressing block 200 are simultaneously moved in parallel with respect to the louver fin 10, but here, in order to make the operation easy to understand, the second pressing block 200 is first attached to the lower surface of the louver fin 10. Next, it is assumed that the first pressing block 100 is in contact with the upper surface of the louver fin 10.

  First, as shown in FIG. 1A, the second pressing block 200 is moved to the lower surface of the louver fin 10 so that the tip 201a of each lower piece 201 and the inner side of the bent portion 11a of the louver fin 10 are brought into contact with each other. Make contact. Here, if the louver fin 10 is molded from right to left, in this example, the material is extended on the right side (the other side in the figure) and the left side (the front side in the figure) in the molding direction. Is not extended. That is, in this state, the louver fin 10 is bent to the right in the molding direction. Therefore, since the material is not extended on the near side in the figure, the outside of the bent portion 11b is not in contact with the upper frame receiver 202 of the second pressing block 200 (a gap is opened).

  Next, the first pressing block 100 is moved in parallel to the second pressing block 200 side so that the upper pieces 101 (tip portions 101a) of the first pressing block 100 and the inner sides of the bent portions 11b of the louver fins 10 are respectively contacted. Make contact. Then, further parallel movement is performed until the bent portion 11b of the louver fin 10 reaches the upper piece receiver 202 of the second pressing block 200 by the upper pieces 101 of the first pressing block 100 as shown in FIG. While pressing, each lower piece 201 of the second pressing block 200 is pressed until the bent portion 11 a of the louver fin 10 reaches the lower piece receiver 102 of the first pressing block 100. At this time, the protruding amount of each of the tip portions 101a and 201a is set so that the distance C between the tip portion 101a of the upper piece 101 and the tip portion 201a of the lower piece 201 is the same as the target fin height. It should be noted that the amount of extension of the bent portion is preferably about 1%, although it varies depending on the fin material and processing conditions.

  In the present embodiment, in the corrugated molding, the amount of material extension is not equal on the left and right, and the upper piece 101 of the first pressing block 100 and the lower piece 201 of the second pressing block 200 are forced by an equal amount on the left and right. Therefore, since the material is stretched (uniaxial tensile deformation), the amount of material extension is substantially uniform on both the left and right sides in the molding direction. Therefore, it is possible to reliably correct the fin bending after corrugation molding.

  FIG. 4 is a side view of the main part showing another configuration of the lower piece holder and the upper piece holder, and the same reference numerals are given to the same parts as in FIG. Hereinafter, one first pressing block 100 will be described as an example.

  Each lower piece receiver 103 of the first pressing block 100 includes a piece receiving portion 103a, an elastic support portion 103b, and a pressing portion 103c. The piece receiving portion 103a is a hard member that comes into contact with the bent portion 11a of the louver fin 10, and is made of metal. The elastic support portion 103b is an elastic support body that presses and supports the piece receiving portion 103a in one direction, and is constituted by a spring. The pressing portion 103a is a support member for the elastic support portion 103b, and is fixed between the adjacent upper pieces 101 to support the elastic support portion 103b. Each upper piece receiver 203 of the second pressing block 200 is configured similarly.

  The piece receiving portion 103a can be made of metal, plastic, hard rubber, or a member having an equivalent predetermined surface hardness. As the elastic support portion 103b, a spring, rubber, resin, or an elastic body having a function equivalent to these can be used in addition to the spring.

  In FIG. 4, when the bent portion 11a of the louver fin 10 is pressed against the piece receiving portion 103a by the tip portion 201a of the lower piece 201, the elastic support portion 103b contracts by the amount pressed, so the bent portion 11a is only this amount. Will be extended.

  Note that either one of the lower piece receiver 103 and the upper piece receiver 203 constituted by a plurality of members as shown in FIG. 4 may be provided, and the other is constituted by an elastic body as shown in FIG. Also good.

  As described above, according to the present embodiment, the fin bend after corrugation can be corrected without deteriorating the material yield. In particular, in the configuration of the present embodiment, it is possible to surely correct the fin bending caused by an external factor after corrugating.

  FIG. 5 is a side view showing an embodiment in which a transport device for reciprocally transporting the press molding part in the molding direction is provided. In FIG. 5, the same components as those in FIG.

  The conveying device 25 is arranged on the upper surface side of the louver fin 10 and is arranged on the lower surface side to form the second press molding portion 24B, which is arranged on the lower surface side, and the first conveying portion 25A that reciprocates and conveys the first press molding portion 24A in the molding direction. And a second conveyance unit 25B that reciprocates in the direction. Since the first transport unit 25A and the second transport unit 25B have the same configuration, the following description will be given by taking one first transport unit 25A as an example.

  25 A of 1st conveyance parts are a rail which has a pair of rollers 121 and 122 rotated by the drive mechanism which is not illustrated, the belt 123 stretched between these rollers 121 and 122, and the groove part which is not illustrated along a longitudinal direction 124, a sliding portion 125 that engages with a not-shown groove portion of the rail 124, is joined to the first press-molding portion 24A, and a belt connection portion 126 that connects the sliding portion 125 and the belt 123. ing.

  In the above configuration, when the pair of rollers 121 and 122 are rotationally driven by a driving mechanism (not shown), the belt connecting portion 126 moves together with the belt 123. As the belt connecting portion 126 moves, the sliding portion 125 moves along the longitudinal direction of the rail 124, so that the first press molding portion 24A joined to the sliding portion 125 is conveyed in the direction of the arrow. The conveyance direction and conveyance speed of the first press molding unit 24 </ b> A can be controlled by the rotation direction and rotation speed of the rollers 121 and 122. Accordingly, the rotational direction and rotational speed of the rollers 121 and 122 are controlled in accordance with the molding speed of the louver fin 10, and these are conveyed while performing press molding in the first press molding section 24A and the second press molding section 24B. By repeating the operation of returning to the original position after press molding, it is possible to continuously correct the bending of the louver fin 10 by press molding.

  As described above, according to the present embodiment, the fin bend after corrugation can be corrected without deteriorating the material yield. In particular, in the configuration of the present embodiment, the bending correction by press molding can be continuously performed. Further, it is possible to surely correct the fin bending caused by an external factor after the corrugation molding.

  FIG. 6 is a side view showing an embodiment in which the press-molded portion is configured in a belt shape. In FIG. 6, the same parts as those in FIGS. 1 and 3 are denoted by the same reference numerals.

  The moving press molding section 26 shown in FIG. 6 includes a first moving press molding section 26A disposed on the upper surface side of the louver fin 10 and a second moving press molding section 26B disposed on the lower surface side. . Since the first moving press molding unit 26A and the second moving press molding unit 26B have the same configuration, one first moving press molding unit 26A will be described below as an example.

  The first moving press molding unit 26A includes a pair of rollers 131 and 132 that are rotationally driven by a driving mechanism (not shown), a belt 133 that is stretched between the rollers, and a first press provided on the outer surface of the belt 133. The moving part 134 is provided. As with the first pressing block 100 shown in FIG. 1, the first pressing moving unit 134 has a structure in which a plurality of upper frames 101 and lower frame receivers 102 (not shown) are alternately arranged. In FIG. 6, the upper piece 101 and the lower piece receiver 102 are schematically shown. In the continuous triangular shape shown in the figure, the peak portion represents the upper frame 101 and the valley portion represents the lower frame receiver 102. In the present embodiment, only the base portion of the upper piece 101 and the lower piece receiver 102 is connected to the belt 133, and when the louver fin 10 is confronted, the upper piece 101 and the lower piece receiver 102 move in parallel. It is configured as follows.

  Similarly, the second press moving part 135 of the other second moving press forming part 26B is also formed on the outer surface of the belt 136. Then, when the respective crest portions and trough portions of the first press moving portion 134 and the second press moving portion 135 are engaged with each other with the louver fin 10 interposed therebetween, the first press moving portion 134 is illustrated in plan view. The upper piece 101 not shown matches the upper piece receiver 202 (not shown) of the second press moving unit 135, and the lower piece 201 (not shown) of the second press moving unit 135 matches the upper piece receiver 102 (not shown) of the first press moving unit 134. Are arranged to be.

  Further, in the portion where the first pressing movement portion 134 and the second pressing movement portion 135 face each other and the mountain portion and the valley portion mesh with each other, the distance between the belts 133 and 136 is set to a predetermined interval. Holding rails 137 and 138 are provided. When the first press moving unit 134 and the second press moving unit 135 are respectively conveyed by the rotational driving of the belts 133 and 136 and pass between the press rails 137 and 138, the first press moving unit 134 and the second press moving unit 135 are arranged in accordance with the arrangement interval of the rails. Since the pressing movement part 134 and the second pressing movement part 135 are pressed against each other in the opposite direction, each upper piece 101 (not shown) of the first pressing movement part 134 moves the bent part 11b of the louver fin 10 to the second pressing movement part. The lower piece 201 (not shown) of the second pressing movement unit 135 pushes the bent portion 11a of the louver fin 10 to the lower piece holder 102 (not shown) of the first pressing movement unit 134. Press until it reaches.

  Therefore, by controlling the rotational speed of the rollers 131 and 132 according to the molding speed of the louver fin 10 and performing the press molding while conveying the first press moving part 134 and the second press moving part 135, the louver fin 10 The bending correction by press molding can be continuously performed.

  As described above, according to the present embodiment, the fin bend after corrugation can be corrected without deteriorating the material yield. In particular, in the configuration of the present embodiment, the bending correction by press molding can be continuously performed. Further, it is possible to surely correct the fin bending caused by an external factor after the corrugation molding.

  FIG. 7 is a perspective view showing the structure of a press forming apparatus according to the fourth embodiment. The press molding apparatus 27 in the present embodiment includes a molding cutter 21 and a molding cutter driving unit 50.

  The cutters 21A and 21B constituting the forming cutter 21 have a structure in which one is a male mold and the other is a female mold and meshes with each other. Since the cutters 21A and 21B have the same configuration, one cutter 21A will be described below as an example.

  In the cutter 21A (21B), a plurality of tooth portions 30A, 30A ... (in the case of 21B, 30B, 30B ...) are formed at predetermined intervals along the circumferential direction, and the top portion 31 and the trough portion 32 of these tooth portions 30A As shown in FIG. 9, the bent portions 11a and the bent portions 11b are alternately and continuously formed on the strip-shaped thin plate 11 at predetermined intervals, and a plurality of cutting and raising blades 34, 35... Formed on the side surface of each tooth portion 30A. Thus, a plurality of louvers 12 are cut and raised in the flat portion 11c of the strip-shaped thin plate 11.

  The cutter 21A configured as described above and the cutter 21B paired with the cutter 21A are formed to have the same shape, and when the two thin cutters 21A and 21B are rotationally driven while passing the strip-shaped thin plate 11, Corrugation is formed by the top 31 formed on each cutter meshing with the trough 32 formed on the counterpart cutter, and at the same time, the cut and raised blades 34 and 35 formed on each cutter are used as the counterpart cutter. The louver 12 is cut and raised by meshing with the formed cutting and raising blades 34 and 35.

  The pitch adjustment roll 22 is composed of pitch adjustment rolls 22A and 22B, and has a structure in which one is a male mold and the other is a female mold and meshes with each other in the same manner as the molding cutter 21. On the pitch adjusting rolls 22A and 22B, a plurality of tooth portions 40A, 40A, and 40B, 40B are formed at predetermined intervals along the circumferential direction. The pitch adjusting roll 22 applies a resistance to the feeding of the louver fin 10 that has been corrugated by the shaping cutter 21 and shrinks it in the length direction, while adjusting the pitch between adjacent bent portions and feeding it to a cutting blade (not shown).

  The forming cutter 21 and the pitch adjusting roll 22 configured as described above are driven to rotate synchronously by a driving mechanism (not shown).

  Next, the forming cutter driving unit 50 will be described.

  The forming cutter driving unit 50 is disposed on both sides in the axial direction of the cutter 21A. Here, the forming cutter driving unit 50 disposed on one side will be described.

  The forming cutter driving unit 50 includes a rotating shaft 51 of the cutter 21A, a rotating roller 52 attached to the rotating shaft 51, a cam 53 that engages with the rotating roller 52, a motor 54 that rotates the cam 53, and a rotating shaft. A slider 55 that rotatably supports one end of 51 and a spring 56 that presses the slider 55 downward are configured.

  One end of the rotating shaft 51 of the cutter 21 </ b> A is rotatably supported in a shaft hole 55 a formed in the slider 55. The slider 55 is formed with a groove 55b that engages with the frame 57, and is engaged so as to be movable in the vertical direction. The spring 56 presses the slider 55 downward with a certain force and contracts when the rotary shaft 51 is lifted upward, and expands when the rotary shaft 51 returns downward to lower the slider 55 with a predetermined force. The strength is set so as to be pressed. The rotating roller 52 is rotatably fitted at a fixed position on the rotating shaft 51, and is eccentrically driven up and down at regular intervals in conjunction with the rotation of the cam 53 attached to the motor shaft 54a.

  In the configuration of this embodiment, it is assumed that the cutter 21B is not provided with the forming cutter driving unit 50 and is fixedly arranged.

  In the above configuration, when the cutters 21 </ b> A and 21 </ b> B are rotationally driven by a drive mechanism (not shown) and the cam 53 is rotationally driven by the motor 54, a range in which the side with the longer eccentric distance of the cam 53 and the rotary roller 52 are engaged. The rotary shaft 51 is pushed up, and the rotary shaft 51 is pushed down in a range where the side with the short eccentric distance and the rotary roller 52 are engaged.

  8A and 8B are side views showing the meshing portions of the cutters 21A and 21B. FIG. 8A is a side view of the main part, and FIG. 8B is an enlarged view of the B portion of FIG.

  The shape of the cam 53 is such that when the cam 53 is rotated once, a range with a short eccentric distance engages with the rotating roller 52 in the section P1 of FIG. 8A, and a range with a long eccentric distance in the section P2. Is set to engage with the rotating roller 52. The section P1 indicates a section in which the meshing interval between the cutters 21A and 21B is minimized, and this section appears alternately as a section for forming the bent portions 11a and 11b of the louver fin 10.

  As shown in FIG. 7, when the belt-like thin plate 11 is passed while the cutters 21 </ b> A and 21 </ b> B are rotationally driven, the top 31 of one molding cutter meshes with the other trough 32, and corrugate molding is performed at the same time. The louver 12 is cut and raised when one of the cutting and raising blades 34 and 35 is engaged with the other cutting and raising blades 34 and 35.

  At this time, in a section in which the meshing interval between the cutters 21A and 21B is minimum, a short range of the eccentric distance of the cam 53 is engaged with the rotating roller 52. Therefore, the cutter 21A connected to the rotating shaft 51 is pressed by the spring 56. As shown in FIG. 8B, the bent portion 11b of the louver fin 10 is pulled by Δh toward the trough 32 side of the tooth portion 30B (cutter 21B) by the top portion 31 of the tooth portion 30A (cutter 21A). It is extended. Similarly, the bent portion 11a is also extended by Δh in a section where the meshing interval between the cutters 21A and 21B is minimized next. Thus, if the fin height at the time of corrugation molding is fh, the bent portions 11a and 11b of the louver fin 10 are extended by the same amount (Δh) in the left and right directions in the molding direction, and the fin height is fh + Δh. It becomes. In addition to the above-described section, the long eccentric distance range of the cam 53 is engaged with the rotating roller 52, so that the cutter 21A connected to the rotating shaft 51 is pushed up against the pressure of the spring 56. In this section, the cutter 21A And the meshing interval of 21B returns to the normal interval.

  In this embodiment, when corrugating is performed, the material is not stretched equally on the left or right side in the molding direction, and forcibly stretched by an equal amount to the left and right for each mountain in conjunction with the vertical movement of the cutter 21A. Therefore, the amount of extension of the material is almost uniform on both the left side and the right side in the molding direction. Therefore, it is possible to prevent fin bending during corrugation molding.

  As another embodiment, the cutter 21B may be provided with a forming cutter driving unit 50, and the cutter 21A may be fixedly arranged. Moreover, it is good also as a structure which provided the shaping | molding cutter drive part 50 in both cutter 21A, 21B.

  As described above, according to this embodiment, it is possible to prevent fin bending during corrugation molding without deteriorating the material yield.

(A), (b) is a principal part side view which shows the formation process of the louver fin by a 1st press block and a 2nd press block. FIG. 3 is a side view showing the arrangement of the press forming apparatus according to the first embodiment. The side view which shows the structure of the press molding apparatus shown in FIG. The principal part side view which shows the other structure of the lower piece holder in Example 1, and an upper piece holder. The side view which shows the structure at the time of providing the conveying apparatus for reciprocatingly conveying a press molding part in a forming direction in Example 2. FIG. The side view which shows the structure at the time of forming a press molding part in Example 3 in the shape of a belt. FIG. 6 is a perspective view showing a structure of a press molding apparatus according to a fourth embodiment. The side view which shows the meshing part of a shaping | molding cutter. (A) is a principal part side view. (B) is an enlarged view of portion B of (a). The whole block diagram which shows the manufacturing process of a louver fin. The perspective view which shows the external appearance of a common louver fin. Sectional drawing which shows the louver arrangement | sequence in a two-way louver fin. Sectional drawing which shows the louver arrangement | sequence in a unidirectional louver fin. The perspective view which shows the bending state of a one way louver fin.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Louver fin 11 ... Strip | belt-shaped thin plate 21 ... Molding cutter 21A, 21B ... Cutter 22 ... Pitch adjustment roll 24, 27 ... Press molding apparatus 24A ... 1st press molding part 24B ... 2nd press molding part 25 ... Conveying apparatus 25A ... 1st 1 conveyance part 25B ... 2nd conveyance part 26 ... movement press molding part 26A ... 1st movement press molding part 26B ... 2nd movement press molding part 30A, 30B, 40A, 40B ... tooth part 31 ... top part 32 ... trough part 34, 35 ... Cutting and raising blade 50 ... Molding cutter driving unit 100 ... First pressing block 200 ... Second pressing block 110 ... First pressing block moving unit 210 ... Second pressing block moving unit 134 ... First pressing moving unit 135 ... Second Press moving part

Claims (9)

The first bent portion (11a) and the second bent portion (11b) are formed by alternately forming the first bent portion (11a) and the second bent portion (11b) on the strip-shaped thin plate (11) to form a continuous corrugated shape. A plurality of louvers (12) cut and raised along the length direction of the strip-shaped thin plate (11) in a flat portion (11c) positioned between the strip-shaped thin plate (11) in the width direction. A device for forming the fin (10),
The upper surface side pressing portion (101) that presses the inside of the second bent portion (11b) from the upper surface side of the louver fin (10), and the first bent portion that is pressed from the lower surface side of the louver fin (10). First pressing blocks (100) in which upper surface side support portions (102) supporting the outside of (11a) are alternately arranged;
The lower surface side pressing portion (201) that presses the inside of the first bent portion (11a) from the lower surface side of the louver fin (10), and the second bent portion that is pressed from the upper surface side of the louver fin (10). A second pressing block (200) in which lower surface side support portions (202) supporting the outside of (11b) are alternately arranged;
The louver fin (10) is sandwiched between the first pressing block (100) and the second pressing block (200), and the upper surface side pressing portion of the first pressing block (100) ( 101) pressing the second bent portion (11b) of the louver fin (10) against the corresponding lower surface support portion (202) of the second pressing block (200) and the second pressing block (200) The lower surface side pressing portion (201) presses the first bent portion (11a) of the louver fin (10) against the corresponding upper surface support portion (102) of the first pressing block (100), so that the louver fin (10 The first bending portion (11a) and the second bending portion (11b) of the louver fin (10) are stretched to a predetermined length.   At least one of the upper surface side support portion (102) of the first pressing block (100) and the lower surface side support portion (202) of the second pressing block (200) is formed of an elastic body. Item 2. The louver fin molding apparatus according to Item 1.   At least one of the upper surface side support portion of the first pressing block (100) and the lower surface side support portion of the second pressing block (200) (103, 203) is the first (11a) or the second bent portion ( 11. The louver fin molding apparatus according to claim 1, further comprising: a hard member (103 a) that abuts on the hard member (11 b) and an elastic support (103 b) that presses and supports the hard member (103 a) in one direction. . The first pressing block (100) is moved in parallel to the second pressing block (200) side, and the upper surface side pressing portion (101) of the first pressing block (100) is used to move the first louver fin (10). First pressing means (110) for pressing the two bent portions (11b) against the corresponding lower surface support portion (202) of the second pressing block (200);
The second pressing block (200) is moved in parallel to the first pressing block (100) side, and the lower surface side pressing portion (201) of the second pressing block (200) causes the first of the louver fins (10) to move. The second pressing means (210) for pressing one bent portion (11a) against the corresponding upper surface support portion (102) of the first pressing block (100) is provided. The louver fin molding apparatus according to claim 1.   The first pressing means (110) is reciprocally conveyed in the molding direction, and the first conveying means (25A) is reciprocated and conveyed in the molding direction in conjunction with the first conveying means (25A). The louver fin molding apparatus according to claim 4, further comprising second conveying means (25B). The first bent portion (11a) and the second bent portion (11b) are formed by alternately forming the first bent portion (11a) and the second bent portion (11b) on the strip-shaped thin plate (11) to form a continuous corrugated shape. A plurality of louvers (12) cut and raised along the length direction of the strip-shaped thin plate (11) in a flat portion (11c) positioned between the strip-shaped thin plate (11) in the width direction. A device for forming the fin (10),
An upper surface side pressing portion (101) that presses the inner side of the second bent portion (11b) from the upper surface side of the louver fin (10) on the outer surface of the first strip member (133) that moves endlessly, and the louver fin ( 10) a first press moving portion (134) in which upper surface side support portions (102) supporting the outside of the first bent portion (11a) pressed from the lower surface side of 10) are alternately arranged;
A lower surface side pressing portion (201) that presses the inner side of the first bent portion (11a) from the lower surface side of the louver fin (10) on the outer surface of the second strip member (136) that moves endlessly, and the louver fin ( 10) a second press moving portion (135) in which lower surface side support portions (202) supporting the outside of the second bent portion (11b) pressed from the upper surface side are alternately arranged;
The first press moving part (134) and the second press moving part (135) are arranged on the first bent part (11a) side and the second bent part (11b) side of the louver fin (10). The louver fins are arranged by the upper surface side pressing portion (101) of the first pressing movement portion (134) by respectively arranging and endlessly moving the first and second belt-like members (133, 136) in synchronization. The second bent portion (11b) of (10) is pressed against the corresponding lower surface support portion (202) of the second press moving portion (137), and the lower surface side pressing portion of the second press moving portion (135). (201), the first bent portion (11a) of the louver fin (10) is pressed against the corresponding upper surface support portion (102) of the first press moving portion (134), and the louver fin (10) First bend (1 Molding apparatus louver fins (10), characterized in that stretching a) and the second bent portion (11b) to a predetermined length. The first strip member (133) is stretched between two rolls (131, 132) arranged along the molding direction, and the second strip member (136) is arranged between two rolls arranged along the molding direction. Stretched between rolls (131, 132),
The pressing members (137, 138) for pressing the first pressing movement part (134) and the second pressing movement part (135) in the opposite direction are respectively the first band member (133) and the second band member. (136) and facing each other,
The first press moving part (134) and the second press moving part (135) are transported endlessly to the louver fin (10) by synchronously driving the rolls, and the first press moving part. (134) and the second pressing / moving part (135) are passed between the pressing members (137, 138), whereby the first pressing / moving part (134) and the second pressing / moving part (135). The louver fin (10) forming apparatus according to claim 6, wherein the louver fin (10) is pressed in the direction of the louver fin (10). It consists of a pair of cutters (21A, 21B) in which a plurality of tooth portions (30A, 30B) are formed along the circumferential direction, and the strip-shaped thin plate (11) supplied between the pair of cutters (21A, 21B) On the other hand, the first bent portion (11a) and the second bent portion (11b) are formed at predetermined intervals on the strip-like thin plate (11) by the top portion (31) and the trough portion (32) of each tooth portion (30A, 30B). Are alternately formed into a continuous corrugated shape, and a side surface of the tooth portion (30A, 30B) on a flat portion (11c) located between the first bent portion (11a) and the second bent portion (11b). A forming cutter for forming a louver fin (10) by cutting and raising a plurality of louvers (12) on a flat portion (11c) of the strip-like thin plate (11) by a plurality of cutting and raising blades (34, 35) formed on (33). (21) and
A cutter driving section (50) for moving at least one cutter of the forming cutter (21) up and down to the opposite cutter side in synchronization with the forming speed;
The first thin plate (11) at a predetermined interval by the top (31) and the trough (32) of each tooth (30A, 30B) formed on the pair of cutters (21A, 21B), respectively. The bent portion (11a) and the second bent portion (11b) are alternately formed, and the at least one cutter is moved up and down by the cutter driving portion (50) to form the tooth portion ( 30A or 30B) The louver characterized in that the first bent portion (11a) and the second bent portion (11b) of the louver fin (10) are extended to a predetermined length by the top portion (31) and the valley portion (32). Fin (10) forming apparatus. The cutter driving unit (50) engages with at least one rotating shaft (51) of the forming cutter (21) and drives the rotating shaft (51) up and down at a predetermined interval (52, 52). 53, 54) and a shaft pressing portion (55, 56) for supporting the rotating shaft (51) so as to be movable in the vertical direction and pressing the rotating shaft (51) in one direction. An apparatus for forming a louver fin (10) according to claim 8.

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