Fin manufacturing method

Abstract

The manufacturing method of a fin comprises a grid-shaped forming step, a cutting step and a stretching step. In the grid-shaped forming step, a grid-shaped portion and a plate-shaped portion (11) located around the grid-shaped portion are formed on a fin material (A). In the cutting step, a continuous portion (12) continuous with the plate-shaped portion (11) and a fin groove portion (13) for inserting a flat tube are formed on the side of the plate-shaped portion (11) on the fin material (A). In the stretching step, a stretching portion (18) having a shape protruding relative to the continuous portion (12) is formed on the continuous portion (12).

Description

Technical Field

[0001] The present disclosure relates to a method for manufacturing a fin. Background Art

[0002] Patent document 1 discloses a die device for manufacturing fins. The die device described in Patent document 1 manufactures fins by performing a stamping process on a metal sheet. When manufacturing the fins, the pressure of the stamping process is applied to the metal sheet, but there is a possibility that the fins may be warped due to unevenness in the locations on the metal sheet to which the pressure is applied.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 2695126 Summary of the invention

[0006] -Technical problem to be solved by the invention-

[0007] An object of the present disclosure is to suppress the warping of fins.

[0008] -Technical solutions for solving technical problems-

[0009] The first aspect is directed to a method for manufacturing a fin. The method for manufacturing a fin is a method for processing a plate-shaped fin material A into a fin 1 for a heat exchanger. The method for manufacturing a fin includes a grid-shaped forming process, a cutting process, and a stretching process. In the grid-shaped forming process, a grid-shaped portion and a plate-shaped portion 11 located around the grid-shaped portion are formed on the fin material A. In the cutting process, a continuous portion 12 continuous with the plate-shaped portion 11 and a fin groove portion 13 for inserting a flat tube are formed on the side of the plate-shaped portion 11 on the fin material A. In the stretching process, a stretching portion 18 having a shape protruding relative to the continuous portion 12 is formed on the continuous portion 12.

[0010] In the first aspect, the fin 1 can be suppressed from warping.

[0011] The second aspect is based on the first aspect and includes a beating step of beating the continuous portion 12 .

[0012] In the second aspect, the length of the fin 1 can be corrected so that the fin 1 does not become too short than a prescribed length.

[0013] According to a third aspect, in the second aspect, in the beating step, the continuous portion 12 is beaten from a side protruding due to formation of the stretched portion 18 .

[0014] In the third aspect, the continuous portion 12 of the fin 1 can be struck from the convex side of the stretched portion 18 .

[0015] The fourth aspect is based on any one of the first to third aspects and includes a flanging step of forming a flanging portion 17 at an edge portion of the fin groove portion 13 .

[0016] In the fourth aspect, by ensuring the strength of the fin 1 by the flange portion 17 , it is possible to suppress deformation of the fin 1 when the flat tube is inserted into the fin groove portion 13 .

[0017] The fifth aspect is based on any one of the first to fourth aspects and includes the following steps of forming a plurality of the fins 1 on the fin material A, and a cutting step of cutting a portion between adjacent fins 1, and performing the hammering step after the cutting step is completed.

[0018] In the fifth aspect, the length of each fin 1 after cutting can be corrected by the tapping step. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a top view of a fin according to an embodiment;

[0020] Figure 2 yes Figure 1 The end view of the fin shown is taken along the II-II line;

[0021] Figure 3 yes Figure 1 An end view of the fin shown cut along line III-III;

[0022] Figure 4 yes Figure 1 The end view of the fin shown is taken along line IV-IV;

[0023] Figure 5 yes Figure 1 The end view of the fin shown is taken along the V-V line;

[0024] Figure 6 is a diagram showing a fin manufacturing apparatus;

[0025] Figure 7 is a flow chart showing a method for manufacturing a fin;

[0026] Figure 8 (a) is a top view showing the process of manufacturing the fin; Figure 8 (b) is a front view showing the process of manufacturing the fin;

[0027] Fig. 9 (a) is a diagram showing a fin material in which warping has occurred; Fig. 9 (b) is a diagram showing a fin material in which warping has occurred. DETAILED DESCRIPTION

[0028] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that the present disclosure is not limited to the embodiments shown below, and various changes can be made without departing from the technical concept of the present disclosure. The drawings are used to briefly describe the present disclosure, and in order to facilitate understanding, the size, ratio or quantity is sometimes exaggerated or simplified as needed.

[0029] Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings.

[0030] <Fin structure>

[0031] Figure 1 It is a top view of the fin 1 for heat exchanger. Figure 2 It is along Figure 1 End view taken along line II-II. Figure 3 It is along Figure 1 End view taken along line III-III. Figure 4 It is along Figure 1 End view taken along line IV-IV. Figure 5 It is along Figure 1 The end view of the V-V line. Figures 1 to 5 In the figure, the X-axis direction, the Y-axis direction, and the Z-axis direction are mutually perpendicular directions. The heat exchanger is provided in, for example, an indoor unit or an outdoor unit of an air conditioner. The heat exchanger is a device that uses air as a cooling source or a heating source to condense or evaporate a refrigerant, for example, a component of a refrigerant circuit of a vapor compression refrigeration device. As the refrigerant circulating in the refrigerant circuit, for example, a carbon dioxide refrigerant is used.

[0032] like Figures 1 to 5 As shown, the fin 1 includes a plurality of structural units 10. The plurality of structural units 10 are arranged continuously along the X-axis direction. The structural unit 10 includes a plate-shaped portion 11, a continuous portion 12, a fin groove portion 13, a grid-shaped portion 14, a first fin wing 15, a second fin wing 16, a flange portion 17, a stretching portion 18, and a scoring portion.

[0033] The plate-like portion 11 is a plate-like member having a thickness in the Z-axis direction. The plurality of plate-like portions 11 are arranged in a row along the X-axis direction. A continuous portion 12 is provided between adjacent plate-like portions 11 .

[0034] The continuous portion 12 is a plate-like member having a thickness in the Z-axis direction and having surfaces perpendicular to the Z-axis direction on one side and the other side of the Z-axis direction. The continuous portion 12 is provided to be continuous with each adjacent plate-like portion 11. The continuous portion 12 is coplanar with each adjacent plate-like portion 11 in terms of each surface on one side and the other side of the Z-axis direction. In the Y-axis direction, the size of the continuous portion 12 is smaller than that of the plate-like portion 11. The continuous portion 12 is located between adjacent plate-like portions 11. The continuous portion 12 is located on the other side of the Y-axis direction of the fin 1.

[0035] The fin groove 13 is a space provided between the adjacent plate-like portion 11 and the continuous portion 12. The fin groove 13 extends in the Y-axis direction. In the Y-axis direction, the size of the fin groove 13 is smaller than the size of the plate-like portion 11. Between the adjacent plate-like portions 11, the fin groove 13 is provided on one direction side in the Y-axis direction relative to the continuous portion 12. In the fin groove 13, one direction side and the other direction side in the X-axis direction are respectively closed due to the existence of the plate-like portion 11, one direction side in the Y-axis direction is open due to the formation of an opening, the other direction side in the Y-axis direction is closed due to the existence of the continuous portion 12, and one direction side and the other direction side in the Z-axis direction are respectively open. The fin groove 13 includes a first groove 131 and a second groove 132. The first groove 131 is a portion of the fin groove 13 located on one direction side in the Y-axis direction. The second groove 132 is a portion of the fin groove 13 located on the other direction side in the Y-axis direction. The second groove portion 132 is continuous with the first groove portion 131 , and is formed so as to protrude from the first groove portion 131 toward the other direction side in the Y-axis direction.

[0036] A flat tube for conveying refrigerant is inserted into the fin groove 13. In order to insert the flat tube, the size of the second groove 132 in the X-axis direction is set to correspond to the size of the flat tube. In the X-axis direction, the size of the first groove 131 is larger than the size of the second groove 132, so that when the flat tube is inserted into the fin groove 13, the first groove 131 functions as a guide groove. As a result, the flat tube can be easily inserted into the fin groove 13.

[0037] The grid-like portion 14 is provided on the plate-like portion 11 and has a shape that bulges from the plate-like portion 11 to one direction side in the Z-axis direction. The grid-like portion 14 includes: a central portion 141 located at the center of the plate-like portion 11 in the Y-axis direction; a first rib 142 provided on one direction side in the Y-axis direction relative to the central portion 141; and a second rib 143 provided on the other direction side in the Y-axis direction relative to the central portion 141. The central portion 141 is formed in an approximately rectangular shape, for example. The first rib 142 bulges more toward one direction side in the Z-axis direction than the central portion 141. The first rib 142 includes a first mounting portion 142a and a pair of first extension portions 142c. The first mounting portion 142a is provided at an edge portion on one direction side in the Y-axis direction of the central portion 141 and extends along the X-axis direction. One of the pair of first extension portions 142c extends from an end portion on one direction side in the X-axis direction of the first mounting portion 142a to one direction side in the Y-axis direction. The other first extension part 142c of the pair of first extension parts 142c extends from the end of the first mounting part 142a on the other direction side in the X-axis direction to the one direction side in the Y-axis direction. The second rib 143 is raised in the one direction side in the Z-axis direction relative to the central part 141. The second rib 143 includes a second mounting part 143a and a pair of second extension parts 143c. The second mounting part 143a is provided at the edge part on the other direction side in the Y-axis direction of the central part 141 and extends along the X-axis direction. One second extension part 143c of the pair of second extension parts 143c extends from the end of the second mounting part 143a on the one direction side in the X-axis direction to the other direction side in the Y-axis direction. The other second extension part 143c of the pair of second extension parts 143c extends from the end of the second mounting part 143a on the other direction side in the X-axis direction to the other direction side in the Y-axis direction.

[0038] The first fin wing 15 is provided on the plate-like portion 11 and arranged between the pair of first extension portions 142c. The first fin wing 15 includes a first through hole portion 151 and a first protrusion 152. The first through hole portion 151 is a hole portion that penetrates the plate-like portion 11 in the Z-axis direction. The first through hole portion 151 is formed in an approximately rectangular shape, for example. The first protrusion 152 is provided at an edge portion of the first through hole portion 151 on the other direction side in the X-axis direction, and has a shape that protrudes from the plate-like portion 11 to one direction side in the Z-axis direction.

[0039] The second fin wing 16 is mounted on the plate-like portion 11 and arranged between the pair of second extension portions 143c. The second fin wing 16 includes a second through hole portion 161 and a second protrusion 162. The second through hole portion 161 is a hole portion that penetrates the plate-like portion 11 in the Z-axis direction. The second through hole portion 161 is formed in an approximately rectangular shape, for example. The second protrusion 162 is provided at an edge portion of the second through hole portion 161 on one side in the X-axis direction, and has a shape that protrudes from the plate-like portion 11 to one side in the Z-axis direction.

[0040] The flange portion 17 has a shape in which a portion of the plate-like portion 11 located at the edge of the fin groove portion 13 is bent in one direction of the Z-axis direction. The flange portion 17 is formed along the edge of the second groove portion 132 of the fin groove portion 13. The flange portion 17 has an approximately U-shape. When the flat tube is inserted into the fin groove portion 13, the strength of the fin 1 is ensured by utilizing the flange portion 17, and deformation of the fin 1 can be suppressed. In addition, the flat tube inserted into the fin groove portion 13 can be effectively brought into contact with the flange portion 17. As a result, the flat tube can be effectively fixed to the fin 1 by brazing or the like.

[0041] The stretching portion 18 is provided on the continuous portion 12 and has a shape that bulges from the continuous portion 12 to one direction side in the Z-axis direction. The notched portion is provided on the continuous portion 12. The notched portion indicates a location where the continuous portion 12 is struck. The notched portion is provided at a location different from the location where the stretching portion 18 is provided in the continuous portion 12. The notched portion is provided, for example, in a region 19 of the continuous portion 12, which is located on one direction side in the Y-axis direction relative to the stretching portion 18.

[0042] <Fin manufacturing equipment>

[0043] Figure 6 Schematic diagram showing a manufacturing apparatus 30 for the fin 1. Figure 6 , a manufacturing device 30 for the fin 1 will be described.

[0044] like Figure 6As shown, the preparation device 30 of the fin 1 includes an uncoiler 31, a feeding device 32 and a punching device 33. A plate-shaped fin material A is wound on the uncoiler 31. The fin material A is, for example, a component made of a metal such as aluminum. The feeding device 32 conveys the fin material A wound on the uncoiler 31 to the punching device 33. The feeding device 32 includes, for example, a clamping feeder having a fixed clamp and a movable clamp. The feeding device 32 conveys the fin material A to the punching device 33 by, for example, repeatedly and alternately performing the following actions: in a state where the clamping of the fixed clamp on the fin material A is released, the fin material A is clamped by the movable clamp while the movable clamp is moved; in a state where the fin material A is clamped by the fixed clamp, the clamping of the movable clamp on the fin material A is released and the movable clamp is returned to the position before the movement. The punching device 33 includes a mold 331. The mold 331 includes an upper mold 331a that can move up and down and a lower mold 331b that is in a stationary state. The lower mold 331b is arranged below the upper mold 331a. Punches, dies, etc. for forming the fin groove portion 13, the grid portion 14, the first fin wing 15, the second fin wing 16, the flange portion 17, the stretching portion 18, the scoring portion, etc. are appropriately formed on the upper mold 331a and the lower mold 331b. When the fin material A is arranged on the lower mold 331b, the upper mold 331a moves downward, whereby the fin material A is clamped by the upper mold 331a and the lower mold 331b, and is thus punched by the mold 331. As a result, various components of the fin 1, such as the fin groove portion 13 and the grid portion 14, are formed on the fin material A (refer to Figure 1 to Figure 5 ).

[0045] <Fin Manufacturing Method>

[0046] Figure 7 1 is a flowchart showing a method for manufacturing the fin 1 . Figure 8 (a) and Figure 8 (b) is a schematic diagram showing the process of manufacturing the fin 1 by press working of the die 331. Figures 6 to 8 (b) The following describes a method for manufacturing the fin 1. In the present embodiment, the feed device 32 conveys the fin 1 to one side in the X-axis direction.

[0047] like Figure 6 , Figure 8 (a) and Figure 8 As shown in (b), in the mold 331, the first position P1 to the seventh position P7 are set between the upper mold 331a and the lower mold 331b. The first position P1 to the seventh position P7 are positioned in the order of the first position P1, the second position P2, the third position P3, the fourth position P4, the fifth position P5, the sixth position P6, and the seventh position P7 toward the conveying direction of the fin 1 (one direction side of the X-axis direction).

[0048] Hereinafter, the specific portion A1 of the fin material A will be described in detail. When the fin material A is conveyed, the specific portion A1 of the fin material A passes through the first position P1 to the seventh position P7 in the order of the first position P1, the second position P2, the third position P3, the fourth position P4, the fifth position P5, the sixth position P6, and the seventh position P7.

[0049] like Figures 6 to 8 As shown in (b), in step S10, when the specific portion A1 of the fin material A reaches the first position P1, it is pressed by the die 331. As a result, the grid-shaped portion 14 is formed in the specific portion A1 (grid-shaped forming step).

[0050] In step S20, when the specific portion A1 of the fin material A reaches the second position P2, it is pressed by the die 331. As a result, the first fin blade 15, the second fin blade 16, and the first groove portion 131 of the fin groove portion 13 are formed in the specific portion A1 (blade forming step).

[0051] In step S30, when the specific portion A1 of the fin material A reaches the third position P3, it is punched by the die 331. As a result, the continuous portion 12 and the second groove portion 132 of the fin groove portion 13 are formed in the specific portion A1 (cutting step).

[0052] In step S40, when the specific portion A1 of the fin material A reaches the fourth position P4, it is pressed by the die 331. As a result, the burring portion 17 is formed in the specific portion A1 (burring step).

[0053] In step S50, when the specific portion A1 of the fin material A reaches the fifth position P5, it is pressed by the die 331. As a result, the stretched portion 18 is formed in the specific portion A1 (stretching step).

[0054] In step S60, when the specific portion A1 of the fin material A reaches the sixth position P6, it is punched by the die 331. As a result, the remaining portion of the specific portion A1 is cut off, so that the fin groove portion 13 communicates with the external space (cutting step).

[0055] In step S70, when the specific portion A1 of the fin material A reaches the seventh position P7, it is punched by the die 331. Thus, by striking the continuous portion 12 of the specific portion A1, a notched portion is formed in the continuous portion 12 (beating process). In the present embodiment, the notched portion is formed in the region 19 of the continuous portion 12. In the present embodiment, in the beating process, the continuous portion 12 is struck from the side protruding due to the formation of the stretched portion. As a result, the structural unit 10 of the fin 1 is formed at the position where the specific portion A1 is located in the fin material A (see Figure 1 ).

[0056] In the first position P1 to the seventh position P7, the adjacent positions are separated by a distance L in the conveying direction. Every time the fin material A is conveyed by a distance L in the conveying direction (one direction side of the X-axis direction), the die 331 punches the fin material A. Thus, the fin material A is processed as a whole as shown in the above steps S10 to S70. As a result, Figure 1 As shown, a plurality of structural units 10 are formed in an array along the X-axis direction, thereby manufacturing the fin 1 .

[0057] <Effect>

[0058] As described above, in the stretching step, the stretching portion 18 having a shape protruding relative to the continuous portion 12 is formed on the continuous portion 12. Thus, even if the fin material A is warped in a manner such that the continuous portion 12 side becomes convex due to the formation of the fin groove portion 13 or the like on the fin material A (see Fig. 9 (a)), the warping toward the continuous portion 12 can be corrected by forming the stretching portion 18 on the continuous portion 12, thereby suppressing the warping of the fin 1. It should be noted that if the stretching portion 18 stretches the continuous portion 12 too much, the fin material A will be warped in a manner that the fin groove portion 13 side becomes convex, so in order to prevent the stretching portion 18 from stretching the continuous portion 12 too much, the fin material A is manufactured. Figure 1 In the fin 1 in which the warping is suppressed as shown, the size, depth, etc. of the stretched portion 18 are adjusted.

[0059] In addition, in the above-mentioned beating step, the continuous portion 12 can be extended by beating the continuous portion 12. Thus, the length of the fin 1 can be corrected so that the fin 1 does not become too short below the target predetermined length.

[0060] The above describes the embodiments and variations, but it should be understood that various changes can be made to their forms and specific circumstances without departing from the spirit and scope of the claims (for example, the following (1)). As long as the functions of the objects of the present disclosure are not affected, the embodiments, variations, and other embodiments can also be appropriately combined or replaced.

[0061] (1) In the method for manufacturing the fin 1, a plurality of fins 1 may be formed on one fin material A. In this case, a plurality of fins 1 are formed side by side on one fin material A, and a cutting step is further added, in which a portion located between adjacent fins 1 is cut. In this case, after the cutting step is completed, the beating step is performed to correct the length of each of the plurality of fins 1.

[0062] - Industrial Applicability -

[0063] In summary, the present disclosure is useful for a method of manufacturing a fin.

[0064] - Explanation of symbols -

[0065] 1 Fin

[0066] 11 plate-shaped part

[0067] 12 Continuation

[0068] 13 Fin slot

[0069] 17 Flanging

[0070] 18 Stretching Department

[0071] A Fin material

Claims

1. A method for manufacturing a fin, wherein a plate-shaped fin material (A) is processed into a fin (1) for a heat exchanger, characterized in that: It includes the grid forming process, cutting process, stretching process and hammering process. In the lattice forming step, a lattice portion and a plate-shaped portion (11) located around the lattice portion are formed on the fin material (A). In the cutting step, a continuous portion (12) continuous with the plate-shaped portion (11) and a fin groove portion (13) for inserting a flat tube are formed on the side of the plate-shaped portion (11) on the fin material (A). In the stretching step, a stretching portion (18) having a shape protruding relative to the continuous portion (12) is formed on the continuous portion (12). In the beating step, the continuous portion (12) is struck. The lattice forming step, the cutting step, the stretching step, and the beating step are performed by punching the fin material (A) using a pair of an upper die (331a) and a lower die (331b).

2. The method for manufacturing a fin according to claim 1, characterized in that: Between the upper die (331a) and the lower die (331b), a position for performing the lattice forming process, a position for performing the cutting process, a position for performing the stretching process, and a position for performing the beating process are set. The fin material (A) is conveyed in such a manner that a specific portion (A1) on the fin material (A) passes through a plurality of the above-mentioned positions, and whenever the specific portion (A1) reaches any one of the plurality of the above-mentioned positions, the specific portion (A1) is punched by the upper mold (331a) and the lower mold (331b), thereby performing a process corresponding to the position reached by the specific portion (A1) on the specific portion (A1).

3. The method for manufacturing a fin according to claim 1 or 2, characterized in that: In the beating step, the continuous portion (12) is struck from a side protruding due to formation of the stretched portion (18).

4. The method for manufacturing a fin according to claim 1 or 2, characterized in that: The method comprises a flanging step of forming a flanging portion (17) at the edge of the fin groove portion (13).

5. The method for manufacturing a fin according to claim 1 or 2, characterized in that: The method comprises the steps of forming a plurality of the fins (1) on the fin material (A), and cutting the portions between the adjacent fins (1). After the cutting process is completed, the hammering process is performed.

6. The method for manufacturing a fin according to claim 1 or 2, characterized in that: A plurality of the plate-like portions (11) are formed in an arranged manner. The continuous portion (12) is located between adjacent plate-shaped portions (11), The stretching portion (18) is formed in the region of the continuous portion (12).

7. A fin manufacturing device for implementing the fin manufacturing method according to claim 1.

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