CN115870383A - Flanging forming method of thin radiating fin - Google Patents
Flanging forming method of thin radiating fin Download PDFInfo
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- CN115870383A CN115870383A CN202211439045.XA CN202211439045A CN115870383A CN 115870383 A CN115870383 A CN 115870383A CN 202211439045 A CN202211439045 A CN 202211439045A CN 115870383 A CN115870383 A CN 115870383A
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- flanging
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- radiating fin
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Abstract
The invention discloses a flanging forming method of a thin radiating fin, which comprises the following steps: a. punching and pre-punching: reserving a corresponding number of reserved parts according to the number of the forming parts, and punching a pre-punched hole on the material belt according to the hole shape of the heat dissipation hole; b. flanging: flanging the punched material belt to form an upturned flanging part, wherein the reserved part is turned over along with the flanging part, the reserved part is provided with a fixed end and a free end, the fixed end of the reserved part is connected with the top end of the flanging part, and heat dissipation holes are formed in the flanged material belt; c. molding: and stamping the flanged material belt to bend the reserved part relative to the flanging part to form a circular arc-shaped forming part. Compared with the prior art, the arc-shaped forming part is not easy to crack in the punch forming process, has the characteristic of low forming reject ratio, can adjust the height of the forming part according to the requirement, and has high universality.
Description
Technical Field
The invention relates to the technical field of radiating fins, in particular to a flanging forming method of a thin radiating fin.
Background
The heat sink is one of the important components of the air conditioner, and is mainly used for increasing the heat exchange surface area. Chinese patent application No. 201610299511.7 discloses a heat sink and a production process thereof, comprising the steps of: a. punching a pre-punched hole; b. carrying out primary flanging; c. and (5) secondary flanging. A supporting part is arranged on the flanging part of the radiating fin, so that gaps among the radiating fins are increased, the horizontally arranged turnover fins have a good supporting effect, and the stability of the plurality of radiating fins after being stacked is guaranteed.
However, the above process is only suitable for the heat sink with a conventional thickness, and for the thin heat sink, the thin heat sink is easy to crack and has a high defective rate in the process of secondary flanging into the inverted L-shaped supporting portion due to its small thickness, so that the problem is urgently needed to be solved.
Disclosure of Invention
The present invention is directed to a method for forming a flange of a thin heat sink, so as to solve the above-mentioned problems in the background art.
The purpose of the invention is realized by the following technical scheme:
a flanging forming method of a thin radiating fin comprises the following steps:
a. punching and pre-punching: reserving a corresponding number of reserved parts according to the number of the forming parts, and punching a pre-punched hole on the material belt according to the hole shape of the heat dissipation hole;
b. flanging: flanging the punched material belt to form an upturned flanging part, wherein the reserved part is turned over along with the flanging part, the reserved part is provided with a fixed end and a free end, the fixed end of the reserved part is connected with the top end of the flanging part, and heat dissipation holes are formed in the flanged material belt;
c. molding: and stamping the flanged material belt to bend the reserved part relative to the flanging part to form a circular arc-shaped forming part.
As a preferable scheme of the present invention, the free end of the reserved portion is an arc-shaped surface.
As a preferable aspect of the present invention, the width of the reserved portion is constant from the fixed end to the free end.
As another preferable aspect of the present invention, the width of the reserved portion is gradually reduced from the fixed end to the free end.
In a preferred embodiment of the present invention, in the step c, a circular arc-shaped forming portion is punched by a forming punch and a forming die.
As a preferable aspect of the present invention, the pressing depth of the forming punch is adjustable.
As a preferable scheme of the invention, the forming male die comprises a male die body, a raised head is convexly arranged in the middle of the lower end face of the male die body, and forming grooves are formed in the lower end face of the male die body and positioned on the periphery of the raised head.
As a preferable scheme of the present invention, the number of the molding grooves is plural, the number of the molding grooves is the same as the number of the reserved portions, and the molding grooves and the reserved portions are arranged in a one-to-one correspondence.
As a preferable aspect of the present invention, the outer diameter of the projection is gradually increased from bottom to top.
As a preferable aspect of the present invention, the heat dissipation holes are circular, oval, or oval.
Compared with the prior art, the invention has the advantages that the arc-shaped forming part is not easy to crack in the punch forming process, has the characteristic of low forming reject ratio, can adjust the height of the forming part according to the requirement and has high universality.
Drawings
FIG. 1 is a schematic view of a heat sink;
FIG. 2 is a schematic view of a material strip structure of a flanging forming method for a thin heat sink according to the present invention;
fig. 3 is a schematic structural diagram of the forming male die.
In the figure:
1. a material belt; 2. flanging part; 3. a molding section; 4. a raised head; 5. forming a groove; 7. a reserved portion.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the embodiments described herein are illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 1 to 3, fig. 1 is a schematic structural view of a heat sink; fig. 2 is a schematic view of a material belt structure of the flanging forming method of the thin heat sink of the present invention; fig. 3 is a schematic structural view of the forming punch.
In this embodiment, a method for forming a flange of a thin heat sink includes the following steps:
a. punching and pre-punching: reserving a corresponding number of reserved parts 7 according to the number of the forming parts 3, and punching a pre-punched hole on the material belt 1 according to the hole shape of the heat dissipation hole;
b. flanging: flanging the material belt 1 punched with the pre-punched holes to form an upwards-turned flanging part 2, turning the reserved part 7 along with the flanging part 2, wherein the reserved part 7 is provided with a fixed end and a free end, the fixed end of the reserved part 7 is connected with the top end of the flanging part 2, and heat dissipation holes are formed in the flanged material belt 1;
c. molding: and stamping the flanged material strip 1 to bend the reserved part 7 relative to the flanging part 2 to form the circular arc-shaped forming part 3.
Specifically, in this embodiment, the free end of the reserved portion 7 is an arc-shaped surface.
Specifically, in this embodiment, the width of the reserved portion 7 gradually decreases from the fixed end to the free end.
Specifically, in the embodiment, in the step c, the arc-shaped forming portion 3 is punched by the forming male die and the forming female die.
Specifically, in this embodiment, the pressing depth of the forming punch is adjustable.
Specifically, in this embodiment, the forming male die includes a male die body, a protruding head 4 is convexly provided in the middle of the lower end surface of the male die body, and forming grooves 5 are provided on the lower end surface of the male die body around the protruding head 4.
It should be noted that, in the embodiment, the forming groove 5 is formed in a whole circle, but the invention is not limited thereto, and a plurality of forming grooves 5 may also be provided, and the number of the forming grooves 5 is the same as that of the reserved portions 7, and the forming grooves 5 and the reserved portions 7 are arranged in a one-to-one correspondence manner.
Specifically, in this embodiment, the outer diameter of the boss 4 gradually increases from bottom to top.
Specifically, in this embodiment, the radiating hole is a circular hole.
It should be noted that, although the heat dissipation holes are oval holes in the embodiment, the invention is not limited thereto, and the heat dissipation holes of the invention may also adopt round holes or oval holes, because the oval holes have straight edges, the stamping of the subsequent forming portion 3 is facilitated, and the reject ratio is low, so the oval hole manner is the preferred scheme of the invention.
It should be noted that, although in the present embodiment, the width of the reserved portion 7 gradually decreases from the fixed end to the free end, the present invention is not limited to this, the width of the reserved portion 7 may also be kept constant from the fixed end to the free end, and the choice in the present embodiment is to facilitate the forming of the forming portion 3 in view of the bending forming of the subsequent forming portion 3, which is a preferred solution of the present invention.
The circular arc-shaped forming part 3 of the embodiment is not easy to crack in the stamping process, the forming reject ratio is low, the height of the forming part 3 can be adjusted as required, and the universality is high.
The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims.
Claims (10)
1. A flanging forming method of a thin radiating fin is characterized by comprising the following steps: the method comprises the following steps:
a. punching and pre-punching: reserving a corresponding number of reserved parts according to the number of the forming parts, and punching a pre-punched hole on the material belt according to the hole shape of the heat dissipation hole;
b. flanging: flanging the punched material belt to form an upturned flanging part, wherein the reserved part is turned over along with the flanging part, the reserved part is provided with a fixed end and a free end, the fixed end of the reserved part is connected with the top end of the flanging part, and heat dissipation holes are formed in the flanged material belt;
c. molding: and stamping the flanged material belt to bend the reserved part relative to the flanging part to form a circular arc-shaped forming part.
2. The flanging forming method of the thin heat radiating fin according to claim 1, characterized in that: the free end of the reserved portion is an arc-shaped surface.
3. The flanging forming method of the thin heat radiating fin according to claim 2, characterized in that: the width of the reserved part is kept constant from the fixed end to the free end.
4. The flanging forming method of the thin heat radiating fin according to claim 2, characterized in that: the width of the reserved part is gradually reduced from the fixed end to the free end.
5. A flanging forming method of a thin fin according to any one of claims 1 to 4, characterized in that: and c, punching the arc-shaped forming part through a forming male die and a forming female die.
6. The flanging forming method of the thin heat sink according to claim 5, wherein: the pressing depth of the forming male die is adjustable.
7. The flanging forming method of the thin heat radiating fin according to claim 1, characterized in that: the forming male die comprises a male die body, a raised head is arranged in the middle of the lower end face of the male die body in a protruding mode, and forming grooves are formed in the periphery, located on the raised head, of the lower end face of the male die body.
8. The flanging forming method of the thin heat radiating fin according to claim 7, characterized in that: the forming grooves are multiple, the number of the forming grooves is the same as that of the reserved portions, and the forming grooves and the reserved portions are arranged in a one-to-one correspondence mode.
9. The flanging forming method of the thin heat radiating fin according to claim 8, characterized in that: the outer diameter of the raised head is gradually increased from bottom to top.
10. The flanging forming method of the thin heat radiating fin according to claim 1, characterized in that: the heat dissipation holes are circular or oval-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211439045.XA CN115870383A (en) | 2022-11-17 | 2022-11-17 | Flanging forming method of thin radiating fin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211439045.XA CN115870383A (en) | 2022-11-17 | 2022-11-17 | Flanging forming method of thin radiating fin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115870383A true CN115870383A (en) | 2023-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211439045.XA Pending CN115870383A (en) | 2022-11-17 | 2022-11-17 | Flanging forming method of thin radiating fin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115870383A (en) |
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2022
- 2022-11-17 CN CN202211439045.XA patent/CN115870383A/en active Pending
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