JP2006136896A - Method and apparatus for manufacturing fin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method and a manufacturing apparatus of a fin which are suitable for keeping the strength of a corrugated fin. <P>SOLUTION: When a plate-shaped metallic sheet 3 which is a fin material is pressed into a corrugated cross section, the plate-shaped metallic sheet 3 is pressed in order for every one pitch P with a punch 25 provided with divided punches 26, 26, ... which are divided at a pitch P of not longer than one wavelength λ toward the wavelength direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a manufacturing method and a manufacturing apparatus for corrugated fins.

A fin having a corrugated cross section for improving heat exchange efficiency is used for a heat exchanger, a heat radiating portion of a machine element, and the like. The corrugated fin is manufactured by forming a flat metal plate into a corrugated shape with a pair of opposed forming gears and then cutting it into a predetermined length (see, for example, Patent Documents 1 and 2).
JP 2001-38439 A JP 2003-181544 A

  14 and 15 are views showing a state in which the flat metal plate 60A is roller-formed into a corrugated 60B by a pair of opposed forming gears 51 and 51. FIG. In the case of such roller forming, as shown in FIG. 15, as the meshing of the tooth portions 51a and 51a of the forming gears 51 and 51 becomes larger, the metal plate 60A is strongly restrained between the tooth portions 51a and 51a. Therefore, when the metal plate 60A is formed into a wave shape, the processing depends on the elongation of the metal plate 60A, and there is a possibility that a thin and fragile portion may be formed. As the fin height increases with respect to the fin pitch, the formed fins tend to be weakened.

  An object of the present invention is to provide a fin manufacturing method and a manufacturing apparatus suitable for maintaining the strength of a corrugated fin.

  Invention of Claim 1 is a manufacturing method of a fin, Comprising: When pressing a flat metal plate into a cross-sectional wave shape, the flat metal plate is provided with a punch provided with a split punch divided into a pitch of one wavelength or less. Are sequentially pressed at every pitch. Note that divided punches having different pitches may be mixed.

  The invention of claim 2 is the method for manufacturing a fin of claim 1, wherein the pitch is one wavelength.

  The invention of claim 3 is an apparatus for manufacturing corrugated fins, comprising a pressing device for pressing a flat metal plate into a corrugated cross-section, the press device having a corrugated cross-section die and a one facing the wavelength direction. And a punch having divided punches divided at a pitch equal to or smaller than the wavelength. Note that divided punches having different pitches may be mixed.

  A fourth aspect of the present invention is the fin manufacturing apparatus according to the third aspect, wherein the pitch is one wavelength.

  A fifth aspect of the present invention is the fin manufacturing apparatus according to the third or fourth aspect, wherein the pressing device further includes a driving unit that sequentially press-drives the divided punches.

  A sixth aspect of the present invention is the fin manufacturing apparatus according to the fifth aspect, wherein the driving unit sequentially presses the divided punches by engaging with the divided punches in order as the slide moves. And a slider for slidingly driving the slider.

  According to the fin manufacturing method of the first aspect of the present invention, since the flat metal plate is pressed in order for each pitch with the divided punches divided into the pitches of one wavelength or less, the strength of the corrugated fin is easily maintained. That is, it can be avoided that the metal plate is stretched between the adjacent tooth portions as in the conventional roller forming, and the fragile portion is formed on the formed corrugated metal plate.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, since the pitch is one wavelength, the molding speed can be increased as compared with the case where one pitch is less than one wavelength. Thereby, manufacturing efficiency can be improved.

  According to the fin manufacturing apparatus of the third aspect of the present invention, the flat metal plates can be sequentially pressed for each pitch by the division punch divided into the pitch of one wavelength or less in the wavelength direction. Thereby, the intensity | strength of a corrugated fin can be maintained. That is, it can be avoided that the metal plate is stretched between the adjacent tooth portions as in the conventional roller forming, and the fragile portion is formed on the formed corrugated metal plate.

  According to the invention of claim 4, in addition to the effect of the invention of claim 3, since one pitch is one wavelength, the molding speed can be increased as compared with the case where one pitch is less than one wavelength. Thereby, manufacturing efficiency can be improved.

  According to the invention of claim 5, in addition to the effect of the invention of claim 3 or 4, the press device further includes a drive unit, so that it is not necessary to prepare a drive device separately.

  According to the invention of claim 6, in addition to the effect of the invention of claim 5, a plurality of divided punches can be press-driven in order with one stroke of the slider, so an actuator such as a motor needs to be attached to each divided punch. In addition, the cost of manufacturing equipment can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

“First Embodiment”
A first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a schematic view schematically showing a fin manufacturing method and manufacturing apparatus.

  As shown in FIG. 1, the fin manufacturing apparatus 10 includes an uncoiler 11, a louver 13, a supply device 15, a press device 17, and a cutting device 19. For example, an aluminum material or a copper material having high heat conductivity is used for the metal plate 3 as the fin material.

  First, the fin material 3 drawn out from the roll is rewound by the uncoiler 11 and the louver 13 to form a flat metal plate 3. The flat metal plate 3 is sent to the press device 17 by the supply device 15, and is formed into the corrugated metal plate 4 by the press device 17. The formed corrugated metal plate 4 is cut into a predetermined length by a cutting device 19 to form a desired fin 5 (see FIG. 8).

  Next, the press device 17 will be described with reference to FIG.

  As shown in FIG. 2, the press device 17 that forms the flat metal plate 3 into the corrugated metal plate 4 includes a base 21, a brace die 22 fixed to the base 21, and a drive unit 27 that press-drives the press die 22. It is equipped with.

  The press die 22 has a die 23 and a punch 25 that mesh with each other, and press surfaces 23 a and 25 a that mesh with the die 23 and the punch 25 have a corrugated cross section corresponding to the shape of the corrugated metal plate 4. The punch 25 is divided into a plurality in the wavelength direction Y, and each divided punch 26 is divided in a pitch P of one wavelength λ or less in the wavelength direction. In this embodiment, one pitch P is set to one wavelength λ.

  The plurality of divided punches 26 arranged in the wavelength direction Y are sequentially press-driven by the drive unit 27 with a time difference. The drive unit 27 includes a slider 29 and an actuator 31 that drives the slider 29. The slider 29 is configured to press the divided punches 26 in order by engaging with the divided punches 26 in order as the slide moves. Specifically, an inclined surface 29 b (engagement portion) is provided at the tip of the slider 29, and when the slider 29 slides from the start point to the end point, the inclined surface 29 b (engagement portion) By engaging with the inclined surface 26b (engagement portion) at the upper end, the divided punches 26 lined up in the wavelength direction Y are sequentially lowered (pressed) in the amplitude direction Z (wave height direction) one by one. It has become. A return spring 33 (see FIG. 7) is provided between each divided punch 26 and the base 21. When the slider 29 returns from the end point to the start point, the slider lower end surface 29c and the divided punch upper end surface 26c When the engagement is released, each split punch 26 is returned to the upper end by the restoring force of the return spring 33.

  Next, the pressing process will be described with reference to FIGS.

  First, as shown in FIG. 2, the flat metal plate 3 is supplied to a predetermined press position of the press die 22 by a supply device (not shown).

  Next, as shown in FIGS. 2 to 3, the slider 31 is slid from the start point to the end point (to the left in FIG. 3) by the actuator 31. At this time, the inclined surface 29b at the tip of the slider 29 and the inclined surface 26b at the upper end of the divided punch 26 are engaged with each other, and the divided punches 26 arranged in the wavelength direction Y are pressed one by one in order (downward in FIG. 3). Descent). Thereby, the flat metal plate 3 is press-molded into a waveform by one pitch P. The supply device 15 feeds the flat metal plate 3 for each press of one pitch P so that a material shortage does not occur.

  Next, after the slider 29 slides to the end point, the slider 29 is returned from the end point to the start point as shown in FIGS. At this time, the engagement between the slider lower end surface 29c and the divided punch upper end surface 26c is released one after another, and the divided punch 26 returns to the upper end one after another by the restoring force of the return spring 33.

  Then, a new flat metal plate 3 is supplied to the press position while the formed corrugated metal plate 4 is sent out by the supply device 15. The above steps are repeated.

  Next, the effects of the first embodiment will be summarized.

  (1) According to the fin manufacturing method and manufacturing apparatus of the first embodiment, when the flat metal plate 3 is pressed into a corrugated cross section, it is divided toward the wavelength direction Y at a pitch P of one wavelength λ or less. In order to press the flat metal plate 3 in order for each pitch P by the punch 25 having the divided punches 26, 26,..., Adjacent tooth portions 51a as in conventional roller forming (see FIGS. 14 and 15). , 51 a, the metal plate 60 </ b> A is stretched, and it is possible to avoid the formation of a fragile portion in the formed corrugated metal plate 60 </ b> B.

  Here, when only one punch 101 of one wavelength size is used as in the fin manufacturing method of the comparative example (FIG. 13), it is necessary to move either the punch 101 or the die 102 for each press. This is not necessary according to the first embodiment. Therefore, according to the first embodiment, the manufacturing speed is higher than that of the comparative example (FIG. 13), and the manufacturing accuracy is high.

  (2) Particularly in the first embodiment, the pitch P is one wavelength λ. Therefore, compared with the case where the pitch P is less than one wavelength λ (for example, compared to the case where two pitches are one wavelength), there are advantages that the molding speed is high and the manufacturing efficiency is high.

  (3) Moreover, in the fin manufacturing apparatus 10 of 1st Embodiment, the press apparatus 17 is further provided with the drive part 27 which press-drives the division | segmentation punch 26 in order. Therefore, it is not necessary to prepare a driving device separately.

  (4) Moreover, in the fin manufacturing apparatus 10 of the first embodiment, the drive unit 27 has a structure including a slider 29 that sequentially press-drives each divided punch 26 as the slide moves. Therefore, the plurality of divided punches 26 can be sequentially press-driven by one stroke of the slider 29. As a result, for example, it is not necessary to attach an actuator such as a motor for each divided punch, and the cost of the fin manufacturing apparatus is reduced.

  As a modified example, the drive unit may have a structure including an actuator provided for each divided punch and a control unit that interlocks each actuator, and the divided punches may be press-driven in order.

  Hereinafter, other embodiments of the present invention will be described. In the following embodiments, the same or similar components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

“Second Embodiment”
The press apparatus of 2nd Embodiment is demonstrated referring FIGS.

  As shown in FIGS. 9-12, although the press apparatus 40 of 2nd Embodiment differs from 1st Embodiment by the point which combined the two sliders 29 and 41, it is similar to 1st Embodiment about another structure, or The pressing method is the same as that of the first embodiment.

  Therefore, according to the press apparatus 40 and the press method of 2nd Embodiment, the effect similar to 1st Embodiment is acquired.

  In the above-described embodiment, one wavelength of the wavy fin is constant, but one wavelength may not be constant. That is, not all the pitches P of the divided punches are constant, and divided punches having different pitches P may be mixed.

FIG. 1 is a schematic view of a fin manufacturing method and manufacturing apparatus according to the first embodiment. FIG. 2 is a diagram illustrating the pressing apparatus and the pressing method according to the first embodiment, and is a diagram illustrating a state before pressing. FIG. 3 is a diagram illustrating the pressing apparatus and the pressing method according to the first embodiment, and is a diagram illustrating a state during pressing. FIG. 4 is a diagram illustrating the pressing apparatus and the pressing method according to the first embodiment, and is a diagram illustrating a final stage during pressing. FIG. 5 is a diagram illustrating the pressing apparatus and the pressing method according to the first embodiment, and is a diagram illustrating a state in which the punch is returned after pressing. FIG. 6 is a diagram illustrating the pressing apparatus and the pressing method according to the first embodiment, and is a diagram illustrating a state in which a metal plate is fed after pressing. FIG. 7 is a schematic diagram enlarging the main part of FIG. FIG. 8 is a perspective view showing a molded fin. FIG. 9 is a side view of the press device according to the second embodiment. 10 is a cross-sectional view taken along the line XX in FIG. 9 and shows a state before pressing. 11 is a cross-sectional view taken along the line XX in FIG. 9 and shows a state during pressing. FIG. 12 is a cross-sectional view taken along the line XX in FIG. 9 and shows a final stage during pressing. FIG. 13 is a diagram showing a pressing method and a pressing apparatus as a comparative example. FIG. 14 is a schematic diagram showing a conventional pressing method (roll forming). FIG. 15 is an enlarged view of a main part of FIG.

Explanation of symbols

3. Flat metal plate (fin material)
DESCRIPTION OF SYMBOLS 4 ... Corrugated metal plate 5 ... Fin 10 ... Fin manufacturing apparatus 17 ... Press apparatus 21 ... Base 22 ... Press die 23 ... Die 23a ... Press surface 25 ... Punch 25a ... Press surface 26 ... Divided punch 27 ... Drive part 29 ... Slider 31 ... actuator λ ... one wavelength P ... pitch Y ... wavelength direction

Claims (6)

A method of manufacturing a fin,
When pressing the flat metal plate (3) into a corrugated cross section,
The plate-like metal plate (3) is separated for each pitch (P) by a punch (25) provided with divided punches (26, 26,...) Divided at a pitch (P) of one wavelength (λ) or less. A method for producing fins, characterized by pressing in order. It is a manufacturing method of the fin of Claim 1, Comprising:
The said pitch (P) is one wavelength ((lambda)), The manufacturing method of the fin characterized by the above-mentioned. An apparatus (10) for producing a corrugated fin,
A pressing device (17) for pressing the flat metal plate (3) into a corrugated cross section;
The pressing device (17)
A fin manufacturing apparatus (10) comprising a punch (26) having split punches (26, 26, ...) split at a pitch (P) of one wavelength (λ) or less. A fin manufacturing apparatus (10) according to claim 3,
The said pitch (P) is one wavelength ((lambda)), The manufacturing apparatus (10) of the fin characterized by the above-mentioned. The fin manufacturing apparatus (10) according to claim 3 or 4,
The said press apparatus (17) is further equipped with the drive part (27) which press-drives the said division | segmentation punch (26,26, ...) in order, The manufacturing apparatus of the fin characterized by the above-mentioned. A fin manufacturing apparatus (10) according to claim 5,
The drive unit (27) sequentially presses the divided punches (26, 26,...) By sequentially engaging the divided punches (26, 26,...) As the slide moves. A fin manufacturing apparatus (10) comprising: a slider (29) to be driven; and an actuator (31) to slide the slider (29).

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