TWI731479B - Stamping and riveting structure of radiating fin - Google Patents

Abstract

The invention discloses a stamping and riveting structure for radiating fins, which includes a base and a radiating fin; the surface of the base is provided with a groove, and at least one side of the opening of the groove has a contact surface; the radiating fin includes a The planting part, the connecting part and the main body part together. The planting part has a reversed structure and is embedded in the groove. The connecting part extends to one side relative to the planting part and touches the contact surface; by forming on the heat dissipation fins There is a connection part, and the connection part is in contact with the contact surface on the base. On the one hand, it can firmly support one side of the heat dissipation fin. The stamping punch stamps the planting part of the reflex structure, which is easier to receive force and make heat dissipation. The fins are more reliably combined on the base, and the height of the heat dissipation fins is further reduced, and it is not easy to bend and deform, and there will be no skewing. It ensures that the heat dissipation channel formed between the two heat dissipation fins is straight. On the other hand, the base The upper heat can be directly transferred to the connecting part, which effectively improves the heat dissipation efficiency.

Description

Stamping and riveting structure of radiating fins

The invention relates to the field of heat sink technology, in particular to a stamping and riveting structure of heat dissipation fins.

In addition to the traditional welding technology, stamping is also used to combine the heat sink fins of the conventional heat sink with the base. The heat sink fins are first inserted into the preset grooves or clamping bosses of the base, and then stamped. The punch is punched, and the heat sink fins are clamped and joined to the groove (or clamping boss) of the base. For example, the US Patent No. 5014776, is to cause the side walls of the grooves on both sides to be deformed by pressing and pushing. Furthermore, the heat dissipation fins can be clamped to achieve the purpose of combining the heat dissipation fins and the base.

The above-mentioned prior patent technology only uses the extrusion deformation on both sides of the groove to achieve the purpose of clamping the root of the heat sink, but the clamping force is concentrated on the deformation position on both sides of the groove opening, and only has two point-shaped clamps. Therefore, the clamping effect is not good, and it is difficult to ensure a stable combination. Not only may the heat sinks have uneven heights, but also the heat sinks are prone to shaking or falling off.

At present, there has been a phenomenon that the end of the heat dissipation fin is directly bent to form a reflexed part, and the reflexed part is stamped by a punching punch, so that the heat dissipation fin is combined with the base. For example, the double-sided blowing disclosed in Chinese invention patent 201820031179.0 The riveting structure of the expansion board and the double-sided inflatable board. The double-sided inflatable board is equivalent to the heat dissipation fin. The double-sided inflatable board has a neck, but the neck is suspended. The purpose of this design is only to avoid The inflatable structure of the double-sided inflatable board shields the riveting position. With this embedded riveting structure, the double-sided inflatable board cannot be more firmly combined on the base. The double-sided inflatable board is easy to bend and deform, and at the same time, it cannot be used. The contact area between the double-sided inflation board and the base is larger, which improves the heat dissipation efficiency. Therefore, it is necessary to study a solution to solve the above-mentioned problems.

In view of this, the main purpose of the present invention is to provide a stamping and riveting structure for heat dissipation fins in view of the deficiencies in the prior art, which can effectively solve the problems of the existing heat dissipation fins that are unstable, easy to bend, and low heat dissipation efficiency. .

In order to achieve the above objectives, the present invention adopts the following technical solutions:

The main purpose of the present invention is to provide a stamping and riveting structure for radiating fins, which includes a base and radiating fins; the surface of the base is provided with grooves for planting the radiating fins, and the opening of the groove At least one side has a contact surface; the heat dissipation fin includes a planting part, a connecting part and a main body that are connected together, the planting part is a reflexed structure and is embedded in the groove, and the connecting part faces one side relative to the planting part Extend and at least partially touch the contact surface; using the above-mentioned base and radiating fins, after the radiating fins insert the planting part into the groove of the base, a stamping punch is used to align the planting part for punching. The stamping punch covers the planting part. After stamping, the planting part is pressed down in the groove to increase the deformation and be tightly combined in the groove to complete the combination of the heat dissipation fin and the base, while the connecting part is in contact Surface contact; by forming a connecting part on the heat sink fin and matching the connecting part to contact with the contact surface on the base, on the one hand, one side of the heat sink fin can be firmly supported, and the stamping punch is opposite to the planting part of the reflex structure Stamping makes it easier to receive stress, which makes the heat dissipation fins more reliably combined on the base, and further reduces the height of the heat dissipation fins, is not easy to bend and deform, and does not appear to be skewed, ensuring the heat dissipation formed between the two heat dissipation fins The flow channel is straight. On the other hand, the heat on the base can be directly transferred to the connecting part, which effectively improves the heat dissipation efficiency.

The secondary objective of the present invention is to provide a stamping and riveting structure for radiating fins, wherein a strip-shaped boss is formed on both sides of the groove, and the contact surface is located on the top surface of one of the strip-shaped bosses. .

Another object of the present invention is to provide a stamping and riveting structure for radiating fins, wherein the contact surface is a horizontal plane, and the bottom surface of the connecting portion is parallel to the contact surface and all are in contact with each other.

Another object of the present invention is to provide a stamping and riveting structure for radiating fins, wherein the planting part, the connecting part and the main body part are integrally formed and connected from bottom to top in sequence, and the planting part and the main body are all vertically oriented. Extend, the connecting portion extends horizontally.

Another object of the present invention is to provide a stamping and riveting structure for heat dissipation fins, wherein the grooves are arranged in parallel at intervals, and correspondingly, there are also multiple heat dissipation fins, and each heat dissipation fin The planting part is embedded in the corresponding groove and fixed.

Another object of the present invention is to provide a stamping and riveting structure for radiating fins, wherein the planting part is a U-shaped structure formed by one reflex.

Another object of the present invention is to provide a stamping and riveting structure for radiating fins, wherein the planting portion is folded at least twice to form a curled structure.

Another object of the present invention is to provide a stamping and riveting structure for radiating fins, wherein the other end of the base is provided with more than one embedding groove for fitting and embedding the heat pipe, and the heat pipe has a flat surface The bottom surface is exposed and combined with the bottom end surface of the base.

Another object of the present invention is to provide a stamping and riveting structure of heat dissipation fins, wherein the heat pipe is bent and penetrated through the main body of the heat dissipation fins to form a tight fitting combination.

Another object of the present invention is to provide a stamping and riveting structure for radiating fins, wherein the two end surfaces of the main body of the radiating fins penetrate through to form accommodating grooves for injecting cooling liquid.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be known from the above technical solutions:

By forming a connecting part on the heat dissipation fin and matching the contact part with the contact surface on the base, on the one hand, one side of the heat dissipation fin can be firmly supported, and the stamping punch punches the planting part of the reflex structure, and more It is easy to be stressed, so that the heat dissipation fins are more reliably combined on the base, and the height of the heat dissipation fins is further reduced, which is not easy to bend and deform, and does not appear to be skewed. It ensures that the heat dissipation channel formed between the two heat dissipation fins is straight On the other hand, the heat on the base can be directly transferred to the connecting part, which effectively improves the heat dissipation efficiency.

In order to explain the structural features and effects of the present invention more clearly, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Please refer to FIGS. 1 to 6, which show the specific structure of the first preferred embodiment of the present invention, including a base 10 and heat dissipation fins 20.

The surface of the base 10 is provided with a groove 11 for implanting heat dissipation fins 20. At least one side of the opening of the groove 11 has a contact surface 12; in this embodiment, the base 10 is made of copper, aluminum, or copper. Base alloy or aluminum-based alloy base, on both sides of the groove 11 are formed with a strip-shaped boss 13, the contact surface 12 is located on the top surface of one of the strip-shaped boss 13, and the contact surface 12 is The horizontal plane, but not limited to the horizontal plane, can also be an inclined plane; and, the grooves 11 are arranged in parallel at intervals, and grooves 14 are formed between two adjacent grooves 11 in the surface of the base 10. , In order to increase the heat dissipation area and improve the ventilation and heat dissipation effect.

The heat dissipation fin 20 includes a planting part 21, a connecting part 22, and a main body 23 that are connected together. The planting part 21 is a reflexed structure, and the height of the planting part 21 is greater than the depth of the groove 11. It is embedded in the groove 11, so when the lower end of the planting portion 21 abuts against the bottom of the groove 11, the upper end of the planting portion 21 protrudes to a height of the contact surface 12; the connecting portion 22 extends to one side relative to the planting portion 21 And at least partly touch the contact surface 12. In this embodiment, there are also multiple heat dissipation fins 20, and the planting portion 21 of each heat dissipation fin 20 is embedded and fixed in the corresponding groove 11, and the planting portion 21 is formed by one reflexing U-shaped structure; the bottom surface of the connecting portion 22 is parallel to the contact surface 12 and all fit in contact to better support the heat dissipation fins 20; and the planting portion 21, the connecting portion 22 and the main body portion 23 are in turn from the bottom The planting part 21 and the main body part 23 both extend vertically, and the connecting part 22 extends horizontally. And, the two end surfaces of the main body 23 of the heat dissipation fin 20 are formed with accommodating grooves (not shown in the figure) for filling the cooling liquid through the two ends of the main body 23 of the heat dissipation fin 20 to improve the heat dissipation effect.

Using the above-mentioned base 10 and heat dissipation fins 20, as shown in FIG. 4, after the heat dissipation fins 20 insert the planting portion 21 into the groove 11 of the base 10, as shown in FIG. The upper end of the quasi-planting part 21 is punched. The punching punch 30 covers the planting part 21. After punching, the upper end of the planting part 21 is flush with the contact surface 12, and the planting part 21 is deformed by pressing down in the groove 11 It is enlarged and tightly combined in the groove 11, as shown in FIG. 6, to complete the combination of the heat dissipation fin and the base, and at the same time, the connecting portion 22 is pressed against the contact surface 12 to contact.

When in use, the base 10 is in contact with the heating element, and the heat of the heating element is transferred to the base 10. Then, a part of the heat on the base 10 is sequentially transferred to the main body 23 through the planting part 21 and the connecting part 22 to dissipate the heat. Another part of the heat on the base 10 is directly transferred to the connecting portion 22 through the contact surface 12, and then transferred from the connecting portion 22 to the main body 23 to dissipate the heat.

Please refer to Figures 7 and 8, which show the specific structure of the second preferred embodiment of the present invention. The specific structure of this embodiment is basically the same as that of the aforementioned first preferred embodiment, with the differences Yes: In this embodiment, the other end surface of the base 10 is provided with more than one embedding groove 15 for fitting and embedding the heat pipe 40, and the heat pipe 40 has a flat bottom surface 41, and is exposed to the bottom of the base 10 On the end face, the heat pipe 40 is bent through the main body 23 of the heat dissipation fin 20 to form a tight fitting combination. By arranging the heat pipe 40, the heat on the base 10 can be transferred to the main body of the heat dissipation fin 20 through the heat pipe 40 Part 23 to improve heat dissipation efficiency.

Please refer to Figures 9 to 14, which show the specific structure of the third preferred embodiment of the present invention. The specific structure of this embodiment is basically the same as that of the aforementioned first preferred embodiment, with the differences Yes: In this embodiment, the planting portion 21 is folded at least twice to form a curled structure, so that the planting portion 21 and the base 10 are more firmly and reliably combined, and the contact area is larger, which improves heat dissipation. effectiveness.

Please refer to FIG. 15 and FIG. 16, which show the specific structure of the fourth preferred embodiment of the present invention. The specific structure of this embodiment is basically the same as that of the aforementioned second preferred embodiment, with the differences Yes: In this embodiment, the planting portion 21 is folded at least twice to form a curled structure. When the lower end of the planting portion 21 (curling structure) abuts against the bottom of the groove 11, the upper end of the curling structure protrudes from the contact surface 12 a height; and the punching punch 30 covers the upper end of the crimping structure but not punching to the base 10. After punching, the upper end of the crimping structure is flush with the contact surface 12, and the crimping structure is pressed down in the groove 11 to increase deformation and increase It is tightly combined in the groove, so that the connection between the planting portion 21 and the base 10 is more firm and reliable, the contact area is also larger, and the heat dissipation efficiency is improved.

The key point of the design of the present invention is that by forming a connecting part on the heat dissipation fin and matching the connection part with the contact surface on the base, on the one hand, one side of the heat dissipation fin can be firmly supported, and the punching punch is opposite to the reflex structure. The planting part is punched, which is more susceptible to force , So that the heat dissipation fins are more reliably combined on the base, and further reduce the height of the heat dissipation fins, are not easy to bend and deform, and will not be skewed, and ensure that the heat dissipation channel formed between the two heat dissipation fins is straight. On the one hand, the heat on the base can be directly transferred to the connecting part, which effectively improves the heat dissipation efficiency.

The above are only preferred embodiments of the present invention, and do not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention are still valid. It belongs to the scope of the technical solution of the present invention.

10: Base

11: groove

12: Contact surface

13: Strip boss

14: Groove

15: Insert groove

20: cooling fins

21: Planting Department

22: Connection part

23: main body

30: Stamping punch

40: Heat pipe

41: Flat bottom surface

Figure 1 is a perspective view of a first preferred embodiment of the present invention; 2 is an enlarged schematic view of the heat dissipation fins in the first preferred embodiment of the present invention; Figure 3 is a front view of the first preferred embodiment of the present invention; 4 is a partial cross-sectional schematic diagram of the first state of the punching and riveting process in the first preferred embodiment of the present invention; 5 is a partial cross-sectional schematic diagram of the second state of the punching and riveting process in the first preferred embodiment of the present invention; 6 is a partial cross-sectional schematic view of the third state of the punching and riveting process in the first preferred embodiment of the present invention; Figure 7 is a perspective view of a second preferred embodiment of the present invention; 8 is a cross-sectional view of the second preferred embodiment of the present invention; FIG. 9 is a perspective view of the third preferred embodiment of the present invention; FIG. 10 is an enlarged view of the heat dissipation fins in the third preferred embodiment of the present invention Schematic diagram; FIG. 11 is a front view of the third preferred embodiment of the present invention; FIG. 12 is a partial cross-sectional view of the first state of the punching and riveting process in the third preferred embodiment of the present invention; FIG. 13 is the first state of the present invention A partial cross-sectional schematic view of the second state of the punching and riveting process in the third preferred embodiment; FIG. 14 is a partial cross-sectional view of the third state of the punching and riveting process in the third preferred embodiment of the present invention; FIG. 15 is the first state of the present invention The three-dimensional schematic diagram of the fourth preferred embodiment; FIG. 16 is a cross-sectional view of the fourth preferred embodiment of the present invention.

10: Base

11: groove

12: Contact surface

13: Strip boss

14: Groove

20: cooling fins

21: Planting Department

22: Connection part

23: main body

Claims (10)

A punching and riveting structure for radiating fins includes a base and radiating fins; the surface of the base is provided with grooves for planting the radiating fins, and is characterized in that at least one side of the opening of the groove has a contact surface The radiating fin includes a planting part, a connecting part and a main body connected together, the planting part is a reflex structure, the height of the planting part is greater than the depth of the groove and is embedded in the groove, the lower end of the planting part When pressed to the bottom of the groove, the upper end of the planting part protrudes to a height of the contact surface; the connecting part extends to one side relative to the planting part and at least partially touches the contact surface; using the above-mentioned base and heat dissipation fins, After the radiating fins insert the planting part into the groove of the base, and the upper end of the planting part protrudes from the contact surface, a punching punch is used to align the upper end of the planting part for punching. The punching punch covers the planting part but Not stamped to the base; after stamping, the upper end of the planting part is flush with the contact surface, and the planting part is pressed down in the groove to increase the deformation and tightly combine in the groove to complete the heat dissipation fin and the base. Combine, and at the same time, the connecting portion is in contact with the contact surface. According to the punching and riveting structure of heat dissipation fins according to claim 1, wherein a strip-shaped boss is formed on both sides of the groove, and the contact surface is located on the top surface of one of the strip-shaped bosses. According to the stamping and riveting structure of heat dissipation fins according to claim 1, wherein the contact surface is a horizontal plane, and the bottom surface of the connecting portion is parallel to the contact surface and all are in contact with each other. The stamping and riveting structure of heat dissipation fins according to claim 1, wherein the planting part, the connecting part and the main body part are integrally formed and connected from bottom to top in sequence, and the planting part Both the main body and the main body extend vertically, and the connecting part extends horizontally. The stamping and riveting structure of heat dissipation fins according to claim 1, wherein the grooves are arranged in parallel at intervals. Correspondingly, there are also multiple heat dissipation fins, and the planting part of each heat dissipation fin Embedded in the corresponding groove and fixed. According to claim 1, the stamping and riveting structure of heat dissipation fins, wherein the planting part is a U-shaped structure formed by a single reflex. The stamping and riveting structure of heat dissipation fins according to claim 1, wherein the planting portion is folded at least twice to form a curled structure, and when the lower end of the planting portion abuts against the bottom of the groove, the upper end of the curling structure protrudes The contact surface is one height; and the punching punch covers the upper end of the crimping structure but not punching to the base. After punching, the upper end of the crimping structure is flush with the contact surface, and the crimping structure is pressed down in the groove to generate deformation and increase tightly. In the groove. The stamping and riveting structure of heat dissipation fins according to claim 1, wherein the other end surface of the base is provided with more than one embedding groove for fitting and embedding the heat pipe, and the heat pipe has a flat bottom surface and is exposed Combined with the bottom end surface of the base. According to the punching and riveting structure of heat dissipation fins according to claim 8, wherein the heat pipe is bent and penetrated through the main body of the heat dissipation fins to form a tight fitting combination. According to claim 1, the punching and riveting structure of the heat dissipation fins, wherein the two end surfaces of the main body of the heat dissipation fins penetrate through to form accommodating grooves for filling the cooling liquid.

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