JP4098547B2 - Heat exchanger fin and heat exchanger fin manufacturing apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a heat-dissipating fin for a heat exchanger, and in particular, a heat-exchanger fin in which bent portions and flat portions on which louvers are formed are alternately and continuously formed in a corrugated shape by a strip-shaped thin plate, and for the heat exchanger The present invention relates to a heat exchanger fin manufacturing apparatus for forming fins.
[0002]
[Prior art]
Heat exchangers such as heater cores, condensers, and evaporators used in radiators and air conditioners mounted on engine cars efficiently exchange heat with refrigerant, cooling water, air, etc. via fins provided on them. It is like that.
[0003]
FIG. 12 shows a conventional fin 1 and a corrugated cutter (not shown) is used to form a strip-like thin plate 2 into a corrugated shape in which bent portions 1a and flat portions 1b are alternately continued, and the strip-like thin plate is formed on each flat portion 1b. The plurality of louvers 3 cut and raised along the length direction Y of 2 are configured as heat exchanger fins arranged side by side in the width direction X of the strip-like thin plate 2.
[0004]
By the way, when the heat exchanger fin 1 cuts and raises the louver 3, as shown in FIG. 13, the bending portion 1a has a larger distortion amount at the cutting outer end portion 3b than the cutting inner end portion 3a. By accumulating in the length direction of the fin 1 for exchangers, as shown in FIG. 14, the top fin of the heat exchanger fin 1 is generated in the bent portion 1a, and the entire fin is curved and rounded.
[0005]
When the heat exchanger fins 1 are rounded as described above, it becomes impossible to assemble the heat exchanger. Therefore, conventionally, a plurality of louvers 3 formed on each flat portion 1b as shown in FIG. By dividing the group A and B so that the cut-and-raised direction is symmetric in the width direction X of the strip-shaped thin plate 2, the group A louver 3 is opened to the front side, and the group B louver 3 is opened to the other side. Further, the straightness of the heat exchanger fins 1 is maintained by equalizing the amount of distortion caused by cutting and raising in the width direction X.
[0006]
[Problems to be solved by the invention]
However, if the direction in which the louver 3 is cut and raised, that is, the opening direction is different in one flat portion 1b, the flow of air passing through the heat exchanger fins 1 meanders and resistance increases, and consequently the amount of air passing therethrough. Decreases and the heat exchange rate decreases.
[0007]
Therefore, in view of the conventional problems, the present invention has an object to provide a heat exchanger fin and a heat exchanger fin manufacturing apparatus that prevent the entire fin from being bent regardless of the direction in which the louver is cut and raised. And
[0008]
[Means for Solving the Problems]
  In the invention of claim 1, the belt-like thin plate is formed by alternately forming bent portions and flat portions so as to have a continuous substantially corrugated shape, and each flat portion is cut at predetermined intervals along the length direction of the belt-like thin plate. In a heat exchanger fin in which a plurality of raised louvers are arranged side by side in the width direction of the strip-shaped thin plate,The louver cut-and-raised direction formed on one of the flat portions opposed across the bent portion and the louver cut-and-raised direction formed on the other flat portion are formed in opposite directions,The louver and the louver provided via the bent portion are provided at different positions in the width direction,Embossing is provided in the vicinity of the flat part adjacent to the bent part and on the boundary part of adjacent louvers on the same flat part.It is characterized by that.
[0009]
According to a second aspect of the present invention, in the heat exchanger fin according to the first aspect, the louvers are approximately ½ different in the width direction.
[0010]
According to a third aspect of the present invention, in the heat exchanger fin according to the second aspect, the bent portion is bent from the outer peripheral side toward the inner peripheral side, and has a substantially U shape extending along the width direction. It is characterized by being molded.
[0011]
According to a fourth aspect of the present invention, in the heat exchanger fin according to the third aspect, the distance between the bent portion distance (L0) and the bent portion deflection amount (H0) along the longitudinal direction of the belt-like thin plate. The relationship of the formula (1) is established.
[0012]
  In the invention of claim 5, in the heat exchanger fin according to claim 1 or claim 2, when the louver is cut up, the strain stress generated in the bent portion strongly acts on the site. Projecting from the inner peripheral surface of the corrugated shape toward the outer peripheral surfaceEmbossedIs provided.
[0013]
  In the invention of claim 6, in the heat exchanger fin (10) according to claim 1 or 2, when the louver is cut up, the strain stress generated in the bent portion acts strongly. Recessed from the outer peripheral surface of the corrugated shape toward the inner peripheral surface.EmbossedIs provided.
[0014]
  In the invention of claim 7,Corrugated cutterThe top and bottom of each tooth portion projecting radially forms a bent portion continuously at a predetermined interval on the belt-like thin plate, and the flat portion of the belt-like thin plate by a plurality of cutting and raising blades formed on the side surfaces of the tooth portion In the heat exchanger fin manufacturing apparatus for forming a corrugated heat exchanger fin by cutting and raising a plurality of louvers arranged in the width direction of the belt-shaped thin plate, and extending in the width direction of the belt-shaped thin plate,The louver cut-and-raised direction formed on one of the flat portions facing each other across the bent portion and the louver cut-and-raised direction formed on the other flat portion are formed in opposite directions, and the top portion Bending portion forming means for forming a distortion adjusting portion for correcting the curvature of the fin in each of the vicinity of the cutting and raising blade adjacent to the bottom and the vicinity of the cutting and raising blade adjacent to the bottomThat we establishedFeatures.
[0015]
【The invention's effect】
According to the invention described in claim 1, since the distance from one end in the width direction of the strip-shaped thin plate to the first louver is different, the torsional moment generated in the bent portion when the louver is cut up is dispersed. The amount of distortion generated in the bent portion can be reduced.
[0016]
Moreover, by this, it can correct | amend that the fin for heat exchangers curves in the length direction, and can ensure straightness.
[0017]
  Therefore, mass production is possible by simply and accurately assembling the heat exchanger without any extra work on the assembling machine.
  In addition, the louver cut-and-raised direction formed on one of the flat portions facing each other across the bent portion and the louver cut-and-raised direction formed on the other flat portion are formed in opposite directions, Since the opening direction of the louver formed on one side of the flat part coincides with the opening direction of the louver formed on the other side of the flat part when molded into a substantially corrugated shape, the flow of air passing through the fin for the heat exchanger Since it is not necessary to meander, it is possible to prevent an increase in ventilation resistance and to secure a heat exchange rate.
[0018]
According to the second aspect of the present invention, in addition to the effect of the first aspect, the distance from one end in the width direction of the strip-shaped thin plate to the first louver differs by approximately ½ of the interval at which the louvers are disposed. Thus, since the torsional moment generated in the bent portion when the louver is cut and raised is evenly distributed, the amount of distortion generated in the bent portion can be reduced.
[0019]
According to the third aspect of the invention, in addition to the effects of the first and second aspects of the invention, the bending is caused by the arc-shaped distortion adjusting portion that protrudes from the outer peripheral side of the bent portion toward the inner peripheral side. Since the mechanical strength of the portion is improved, it is possible to reduce the amount of distortion of the bent portion caused by the torsional moment generated when the louver is cut up.
[0020]
Thereby, it can correct | amend that the fin for heat exchangers curves in the length direction, and can further improve straightness.
[0021]
Therefore, mass production is possible by simply and accurately assembling the heat exchanger without any extra work on the assembling machine.
[0022]
According to the invention described in claim 4, in addition to the effect of the invention of claim 3, the length of the bent portion necessary for the bent portion to have sufficient mechanical strength is clarified. An increase in manufacturing cost due to the formation of the portion can be prevented.
[0023]
According to the fifth aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, the convex emboss is disposed at the site where the strain stress generated when the louvers are cut up is strongly applied. As a result, the mechanical strength of the bent portion with respect to the strain stress is improved, and the occurrence of strain deformation can be prevented.
[0024]
According to the sixth aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, the concave embossing is disposed at a site where the strain stress generated when each louver is cut up is strongly applied. As a result, the mechanical strength of the bent portion with respect to strain stress is improved, and the occurrence of strain deformation can be prevented.
[0025]
According to the seventh aspect of the present invention, when the corrugated cutter is rotated to form the heat exchanger fins, the distortion adjusting portion forming portions are formed at the top and bottom of the teeth protruding radially. Since the bent portion is formed in the belt-like thin plate by the top portion and the bottom portion, and at the same time, the strain adjusting portion for correcting the curvature of the fin is formed in the bent portion, the process of correcting the curvature of the fin is the same process as the corrugating process Can be achieved, and the productivity of heat exchanger fins can be improved.
[0026]
  Moreover, since it can be made to correspond to the conventional manufacturing apparatus only by replacing | exchanging a corrugated cutter, it can prevent the increase in manufacturing cost.it can.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0028]
(Reference example)
  1 to 8 show a heat exchanger fin of the present invention and a manufacturing apparatus for forming the heat exchanger fin.Reference example1 is a perspective view showing a part of a fin for a heat exchanger, FIG. 2 is an enlarged cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is an enlarged view of a portion B in FIG. 3, FIG. 5 is an explanatory diagram of the bent portion length, the amount of deflection, and the amount of deviation, FIG. 6 is a diagram showing the relationship between the bent portion and the amount of deflection, and FIG. FIG. 8 is a schematic view showing a molding process, and FIG. 8 is a perspective view showing a corrugated cutter.
[0029]
FIG. 1 shows a fin shape formed by the corrugated cutters 21 and 21a shown in FIG. 7 and before passing through the pitch adjusting rolls 22 and 22a.
[0030]
  As shown in FIG.Reference exampleThe heat exchanger fin 10 is formed in a continuous corrugated shape by alternately forming bent portions 12 and flat portions 13 of strip-like thin plates 11 made of aluminum, and the strip-like thin plates 11 are formed on the flat portions 13, 13. Are formed side by side in the width direction X of the strip-shaped thin plate 11. The plurality of louvers 14, 14,.
[0031]
Further, the bent portion 12 is a distortion adjusting portion 12c which is curved so as to protrude from the corrugated outer peripheral side 12a toward the inner peripheral side 12b and is formed in a substantially U shape extending along the width direction. .
[0032]
Further, as shown in FIG. 2, the direction in which the louvers 14, 14... Formed on one of the flat portions 13, 13 facing each other with the bent portion 12 interposed therebetween, and the louvers 15, 15. Are formed in directions opposite to each other.
[0033]
FIG. 3 shows a development view of the heat exchanger fin 10 shown in FIG. 1, and an enlarged view of the periphery of the bent portion 12 is shown in FIG. 4 (a).
[0034]
  As shown in FIG.Reference exampleThen, the louver 14 and the louver 15 have the same louver width L and the cut-and-raised portions 14a and 15a are shifted by a ½ interval, and are arranged at equal intervals.
[0035]
FIG. 4 (b) shows an enlarged view of the periphery of the bent portion 12 which has been conventionally performed. The louver 14 'and the louver 15' have the raised portions 14a 'and 15a' coincide with each other. As shown in FIG.
[0036]
As shown in FIG. 4 (b), when the louvers 14 'and 15' are cut and raised by a conventional method, the cut and raised portions 15a 'of the louver 15' are on the extension line of the cut and raised portions 14a 'of the louver 14'. Therefore, since the torsional moment is applied to the bent portion 12 in the same straight line and in the opposite direction, the strain stress is concentrated, and the mechanical strength of the bent portion 12 is insufficient to cause strain deformation.
[0037]
  ThereforeReference exampleThen, in order to eliminate this distortion deformation, the distances D1 and D2 from the one end 11a in the width direction X of the strip-shaped thin plate 11 to the first louvers 14 and 15 are provided so as to be different by approximately ½ interval. As shown in FIG. 4 (a), the louver 14 and the louver 15 are arranged so as to be shifted by ½ interval.
[0038]
As a result, the torsional moment generated when the louver 14 is raised and the torsional moment generated when the louver 15 is raised are generated at equal intervals in the bent portion 12, so that the influence of each torsional moment is reduced. . For this reason, the distortion stress generated in the cut-and-raised portions 14a and 15a is dispersed to prevent the bending portion 12 from being distorted and deformed.
[0039]
Further, the bent portion 12 is a distortion adjusting portion 12c which is curved so as to protrude from the corrugated outer peripheral side 12a toward the inner peripheral side 12b and is formed in a substantially U shape extending along the width direction. .
[0040]
  Reference exampleThen, the distortion adjusting portion 12c is processed into a substantially U-shaped cross section so that the bending portion 12 has a bending amount H0 with respect to the length L0 and satisfies the relationship of the expression (1), and the mechanical strength of the bending portion 12 is increased. Since it is improved, the occurrence of distortion deformation due to the torsional moment is further prevented.
[0041]
H0> L0 / 10 (1)
As shown in FIG. 5B, the relationship of the expression (1) is such that the length L0 of the bent portion 12 extending in the length Y direction and the heat exchanger fin 10 from the outer peripheral side 12a to the inner peripheral side 12b. The relationship of the bending amount H0 of the bending part 12 at the time of making it protrude in circular arc shape toward is shown.
[0042]
FIG. 6 shows the relationship between the deflection rate and the deviation amount. The deflection rate is a ratio between the deflection amount H0 and the length L0 of the bent portion 12, and the deviation amount is as shown in FIG. This is a deviation measured on one end side 11a of the flat portions 13 and 13 of the fin 10 for heat exchanger formed into a corrugated shape.
[0043]
As shown in FIG. 6, the mechanical strength of the bent portion 12 is improved from the point where the deflection rate exceeds 0.1, and the shift amount is reduced. From this, the relationship of equation (1) can be derived.
[0044]
When the fin pitch of the corrugated fin 10 is adjusted after forming with the corrugated cutters 21 and 21a, the flat surface or the concave shape of the distortion adjusting portion 12c may be reversed, depending on the degree of processing.
[0045]
Below, the manufacturing apparatus 20 of the fin 10 for heat exchangers is demonstrated. The heat exchanger fins 10 are formed through the manufacturing process shown in FIG.
[0046]
The strip-shaped thin plate 11 drawn out from the roll 24 is passed between a pair of corrugated cutters 21 and 21a arranged on both sides in the thickness direction, and the formation of the bent portions 12, 12... And the flat portions 13, 13. Are formed at the same time and formed into a corrugated shape.
[0047]
Next, the strip-shaped thin plate 11 formed into a corrugated shape is contracted in the length direction by the resistance of the pitch adjusting rolls 22 and 22a while being fed through the apparatus, and the pitch between the adjacent bent portions 12, 12. It is done.
[0048]
Then, the strip-shaped thin plate 11 whose pitch is adjusted is cut into a predetermined length by the cutting blade 23 and processed into a heat exchanger fin 10 having a predetermined length according to the dimension of the heat exchanger to be incorporated. It is like that.
[0049]
Here, the corrugated cutters 21 and 21a have a structure in which one is a male mold and the other is a female mold and meshes with each other, and FIG. 8 shows an example of the corrugated cutter 21a.
[0050]
This corrugated cutter 21a (and 21) has a shape in which a plurality of tooth portions 30, 30... Project radially, and the top portion 31 and bottom portion 31a of each tooth portion 30, 30. As shown in FIG. 1, a plurality of cutting and raising blades 33 formed on the side surfaces 32 of the tooth portions 30, 30... The louvers 14, 14..., 15, 15... Are raised in the flat portions 13, 13.
[0051]
At this time, the forming directions of the cutting and raising blades 33, 33... And 33a, 33a... Are the side surfaces 32, 32 located on both sides with respect to the top portion 31 (or the bottom portion 31a), and the thickness T direction of the corrugated cutter 21a. Are formed in opposite directions.
[0052]
Further, the corrugated cutter 21a and the corrugated cutter 21 paired with the corrugated cutter 21a are formed in a corresponding shape, and one of the corrugated cutters 21 and 21a meshes with the other bottom 31a, The cutting and raising blades 33 and 33a are engaged with the other cutting and raising blades 33 and 33a so that the louvers 14 and 15 can be cut and raised.
[0053]
In addition, the distance between the first raising and lowering blades 33 and 33a from the end face 30a of the corrugated cutters 21 and 21a differs by ½ of the interval at which the louvers 14 and 15 are disposed.
[0054]
Further, an arcuate concave groove 35 extending in the thickness direction T of the corrugated cutters 21 and 21a is formed in the top portion 31 of the tooth portion 30. And the protrusion part 36 is extended in the thickness direction T of the corrugated cutters 21 and 21a at the bottom part 31a of the tooth part 30 so that it may mesh with this concave groove 35.
[0055]
The distortion adjusting portion 12 c can be provided in the heat exchanger fin 10 by the concave groove 35 and the convex portion 36.
[0056]
From the above, the distance from one end in the width direction of the belt-like thin plate to the first louver differs by about ½ of the interval at which the louvers are arranged, and the other louvers also differ by ½, so that the louvers are raised. Since the torsional moment generated in the bent portion is evenly distributed, the amount of distortion generated in the bent portion can be reduced.
[0057]
Thereby, it can correct | amend that the fin for heat exchangers curves in the length direction, and can ensure straightness. Therefore, mass production is possible by simply and accurately assembling the heat exchanger without any extra work on the assembling machine.
[0058]
Since the mechanical strength of the bent part is improved by the arc-shaped distortion adjustment part that protrudes from the outer peripheral side to the inner peripheral side of the bent part, the distortion of the bent part caused by the torsional moment generated when the louver is raised The amount can be reduced.
[0059]
Thereby, it can correct | amend that the fin for heat exchangers curves in the length direction, and can further improve straightness. Therefore, mass production is possible by simply and accurately assembling the heat exchanger without any extra work on the assembling machine.
[0060]
Since the length of the bent portion necessary for the bent portion to have sufficient mechanical strength is clarified, an increase in manufacturing cost due to the formation of the strain adjusting portion can be prevented.
[0061]
When the corrugated cutter is rotated to form the heat exchanger fins, since the strain adjusting portion forming portions are formed at the top and bottom of the teeth protruding radially, the bent portion is formed on the belt-like thin plate by the top and the bottom. At the same time as being formed, a distortion adjusting portion for correcting the curvature of the fin is formed in the bent portion, so that the process of preventing the curvature of the fin can be achieved in the same process as the corrugating process, and the fin for the heat exchanger Productivity can be improved.
[0062]
Moreover, since it can respond to the conventional manufacturing apparatus only by replacing | exchanging a corrugated cutter, the increase in manufacturing cost can be prevented.
[0063]
  In addition,Reference exampleThen, the curved portion is provided with an arcuate projecting from the outer peripheral side 12a to the inner peripheral side 12b of the bent portion 12, and a distortion adjusting portion having a substantially U-shaped cross section is provided. A similar effect can be obtained by providing a cross-sectional shape that improves the mechanical strength of the bent portion 12, such as a substantially trapezoidal shape.
[0064]
(One embodiment)
  9 and 10 show the heat exchanger fin of the present invention and the corrugated cutter forming the heat exchanger fin.One embodimentFIG. 9 is a perspective view showing a part of a fin for a heat exchanger, and FIG. 10 is a perspective view showing a corrugated cutter.
[0065]
  As shown in FIG.One embodimentThe heat exchanger fin 10 ofReference exampleSimilarly, the strip-shaped thin plate 11 made of aluminum is formed as a continuous wave shape by alternately forming the bent portions 12 and the flat portions 13, and the length of the strip-shaped thin plate 11 is formed in each of the opposed flat portions 13, 13. A plurality of louvers 14, 14..., 15, 15... Cut and raised along the vertical direction Y are formed side by side in the width direction X of the strip-shaped thin plate 11.
[0066]
  Also,Reference exampleSimilarly, the louver 14 and the louver 15 are arranged so as to be shifted by ½ pitch.
[0067]
  This embodiment andReference exampleThe difference betweenReference exampleHowever, in this embodiment, the bent portion 12 is provided with an arcuate distortion adjusting portion having a substantially U-shaped cross section, and in the present embodiment, the flat bent portion 12 protrudes from the inner surface side 12b toward the outer surface side 12a. A plurality of embosses 101 are provided.
[0068]
The emboss 101 is disposed at a site where the torsional moment generated when the louvers 14 and 15 are cut up and acting strongly on the bent portion 12. As a result, the mechanical strength of the bent portion 12 against strain stress is improved, and the occurrence of strain deformation is prevented.
[0069]
  Next, the manufacturing apparatus 20 of the fin 10 for heat exchangers is demonstrated. The heat exchanger fin 10 of this embodiment isReference exampleIn the same manner as above, it is formed through the manufacturing process shown in FIG.
[0070]
  This embodiment andReference exampleThe difference betweenReference exampleIn this manufacturing apparatus, the corrugated cutters 21 'and 21a' as shown in FIG. 8 are used to form the heat exchanger fins. However, in this embodiment, as shown in FIG. The heat exchanger fins 10 are formed using the corrugated cutters 21 'and 21a'.
[0071]
  Reference exampleSimilarly, the corrugated cutters 21 'and 21a' have a structure in which one is a male type and the other is a female type and meshes with each other.
[0072]
As shown in FIG. 9, the corrugated cutters 21a, 21 have a plurality of tooth portions 30, 30 ... projecting radially, and the top portions 31 and bottom portions 31a of the tooth portions 30, 30 ... projecting radially. In addition, the bent portion 12 is continuously formed on the belt-like thin plate 11 at a predetermined interval, and each of the flat portions is formed by a plurality of cutting and raising blades 33, 33 ... and 33a, 33a ... formed on the side surface 32 of each tooth portion 30, 30 ... The louvers 14, 14,..., 15, 15,.
[0073]
At this time, the forming directions of the cutting and raising blades 33, 33... And 33a, 33a... Are the side surfaces 32, 32 located on both sides with respect to the top portion 31 (or the bottom portion 31a), and the thickness T direction of the corrugated cutter 21a. Are formed in opposite directions.
[0074]
Further, the corrugated cutter 21a 'and the corrugated cutter 21' paired with the corrugated cutter 21a 'are formed in substantially the same shape, and one top portion 31 of the corrugated cutters 21' and 21a 'meshes with the other bottom portion 31a. Further, one of the cutting and raising blades 33 and 33a is engaged with the other of the cutting and raising blades 33 and 33a so that the louvers 14 and 15 can be cut and raised.
[0075]
In addition, the distance between the first cutting and raising blades 33 and 33a from the end face 30a of the corrugated cutters 21 'and 21a' differs by 1/2 of the interval at which the louvers are arranged.
[0076]
Further, as shown in FIG. 10, the corrugated cutters 21 'and 21a' are provided with a convex portion 101 at the top 31 and a concave portion 102 at the bottom 31a.
[0077]
Thereby, the embossing 101 is simultaneously formed with the bent portion 12 by the band-shaped thin plate 11 being sandwiched between the one convex portion 101 and the other concave portion 102 of both cutters 21 ′ and 21 a ′ in the corrugated shape forming step. Is to be molded.
[0078]
As another aspect of the heat exchanger fin manufacturing apparatus in the present embodiment, a press die 40 may be used instead of the corrugated cutters 21 'and 21a'.
[0079]
From the above, the torsional moment generated in the bent portion when the louver is raised by the fact that the distance from one end in the width direction of the strip-shaped thin plate to the first louver differs by approximately ½ of the interval at which the louver is disposed. Is evenly distributed, the amount of distortion generated in the bent portion can be reduced.
[0080]
Thereby, it can correct | amend that the fin for heat exchangers curves in the length direction, and can ensure straightness. Therefore, mass production is possible by simply and accurately assembling the heat exchanger without any extra work on the assembling machine.
[0081]
Protrusion embossing is provided at the site where the strain stress generated when each louver is cut up, and the mechanical strength of the bent part against strain stress is improved, and the occurrence of strain deformation is prevented. Can do.
[0082]
Thereby, it can correct | amend that the fin for heat exchangers curves in the length direction, and can further improve straightness. Therefore, mass production is possible by simply and accurately assembling the heat exchanger without any extra work on the assembling machine.
[0083]
When the corrugated cutter is rotated to form the heat exchanger fins, since the distortion adjusting portions are formed at the top and bottom of the teeth projecting radially, a bent portion is formed on the belt-like thin plate by the top and bottom. At the same time, since the strain adjustment part that corrects the curvature of the fin is formed at the bent part, the process of preventing the curvature of the fin can be achieved in the same process as the corrugating process, and the production of fins for heat exchangers Can be improved.
[0084]
Moreover, since it can respond to the conventional manufacturing apparatus only by replacing | exchanging a corrugated cutter, the increase in manufacturing cost can be prevented.
[0085]
In the present embodiment, the emboss 101 is provided so as to protrude from the inner peripheral side 12b of the bent portion 12 toward the outer peripheral side 12a, but from the outer peripheral side 12a of the bent portion 12 toward the inner peripheral side 12b. Even if the embossing is provided so as to protrude, the same effect can be obtained.
[0086]
When forming fins for heat exchangers using a press die, the strain adjustment part forming part is formed at the top and bottom of the teeth projecting radially, so that a bent part is formed on the belt-like thin plate by the top and bottom. At the same time, since the strain adjusting portion for correcting the curvature of the fin is formed in the bent portion, the process of preventing the curvature of the fin can be achieved in the same process as the press molding process. Productivity can be improved.
[0087]
Moreover, since it can respond to the conventional manufacturing apparatus only by replacing | exchanging a press die, the increase in manufacturing cost can be prevented.
[0088]
  The present inventionOne embodimentExplained with an example,This embodimentThe present invention is not limited to this, and various embodiments can be employed without departing from the scope of the present invention.
[Brief description of the drawings]
FIG. 1 of the present inventionReference exampleThe perspective view which shows a part of fin for heat exchangers in.
FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG.
FIG. 3 of the present inventionReference exampleThe principal part expanded view of the fin for heat exchangers in FIG.
4 is an enlarged view of a portion B in FIG.
5A is a schematic diagram showing a definition of a deviation amount, and FIG. 5B is a cross-sectional view of a main part showing definitions of a bent portion length and a deflection amount.
FIG. 6 is a diagram showing a relationship between a bending amount and a deviation amount of a bent portion.
[Fig. 7] of the present invention.Reference exampleSchematic which shows the formation process of the fin for heat exchangers in FIG.
[Fig. 8] of the present inventionReference exampleThe perspective view which shows the corrugated cutter in.
FIG. 9 shows the present invention.One embodimentThe perspective view which shows a part of fin for heat exchangers in.
FIG. 10 shows the present invention.One embodimentThe perspective view which shows the corrugated cutter in.
FIG. 11 is a perspective view showing a part of a conventional heat exchanger fin.
FIG. 12 is an enlarged perspective view of a main part of a conventional heat exchanger fin.
FIG. 13 is a perspective view showing a curved state of a conventional heat exchanger fin.
[Explanation of symbols]
  10 Heat exchanger fins
  11 Strip-shaped thin plate
  12 Bending parts
  13 Flat part
  14, 15 louvers
  14a, 15a Cut and raised part
  14a ', 15a' Cut and raised part
  21, 21a Corrugated cutter
  30 teeth
  31 Top
  31a bottom
  33, 33a Cutting and raising blade
  101, 102 Emboss (distortion adjustment unit)

Claims (7)

The strip-shaped thin plate (11) is formed into a substantially waveform shape by alternately forming the bent portions (12) and the flat portions (13), and the length direction (Y) of the strip-shaped thin plate (11) is formed in each flat portion (13). In the heat exchanger fin (10) in which a plurality of louvers (14, 15) cut and raised at predetermined intervals (P) along the width direction (X) of the strip-shaped thin plate (11) are arranged in parallel,
The direction of cutting and raising the louver (14) formed on one of the flat portions (13) facing each other with the bent portion (12) in between, and the louver (15) formed on the other of the flat portions (13) Cut and raised directions are formed in opposite directions,
The louver (14) and the louver (15) provided via the bent portion (12) are provided at different positions in the width direction (X),
Providing an emboss (100) that protrudes in the vicinity of the flat portion (13) adjacent to the bent portion (12) and at the boundary between adjacent louvers (14, 14) on the same flat portion (13). Features heat exchanger fins. The heat exchanger fin (10) according to claim 1,
The heat exchanger fin according to claim 1, wherein the louvers (14, 15) are approximately ½ different in the width direction (X). The heat exchanger fin (10) according to claim 2,
A fin for a heat exchanger, wherein the bent portion (12) is curved from the outer peripheral side toward the inner peripheral side and is formed into a substantially U shape extending along the width direction. In the heat exchanger fin (10) according to claim 3,
The substantially U-shaped forming portion is between the distance (L0) of the bent portion (12) along the length direction (Y) of the strip-shaped thin plate (11) and the bending amount (H0) of the bent portion (12). A heat exchanger fin characterized by satisfying the relationship of formula (1).
H0> L0 / 10 (1) In the heat exchanger fin (10) according to claim 1 or claim 2,
When the louvers (14, 15) are cut up, the embosses projecting from the inner peripheral surface of the corrugated bent portion toward the outer peripheral surface are provided at the site where the strain stress generated in the bent portion (12) acts strongly. A fin for a heat exchanger characterized by that.   The heat exchanger fin (10) according to claim 1 or 2, wherein when the louver (14, 15) is cut up, a strain stress generated in the bent portion (12) is strongly applied to the site. A fin for a heat exchanger, comprising the emboss projecting from the outer peripheral surface of the corrugated bent portion toward the inner peripheral surface. A bent portion (12) is continuously formed at a predetermined interval on the belt-like thin plate (11) by a top portion (31) and a bottom portion (31a) of each tooth portion (30) projecting radially from the corrugated cutter (21, 21a). In addition, the longitudinal direction (Y) of the strip-shaped thin plate (11) is formed on the flat portion (13) of the strip-shaped thin plate (11) by a plurality of cutting and raising blades (33, 33a) formed on the side surface of the tooth portion (30). Heat exchanger fins that cut and raise a plurality of louvers (14, 15) arranged in parallel in the width direction (X) of the strip-shaped thin plate (11) to form corrugated heat exchanger fins (10) In the manufacturing apparatus (20),
The direction of cutting and raising the louver (14) formed on one of the flat portions (13) facing each other with the bent portion (12) in between, and the louver (15) formed on the other of the flat portions (13) Cut and raised directions are formed in opposite directions,
Distortion adjustment that corrects the curvature of the fin in the vicinity of the cutting and raising blade (33, 33a) adjacent to the top portion (31) and the vicinity of the cutting and raising blade (33, 33a) adjacent to the bottom portion (31a) An apparatus for producing fins for heat exchangers, characterized in that bent portion forming means (101, 102) for forming the portion (100) is provided .

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