CN102999131A - Method for stamping and combining radiator fin and base - Google Patents

Abstract

A method for stamping and assembling fins of a heat sink and a base comprises the following steps: making a base, and providing a plurality of positioning parts at intervals on the surface of a metal base body of the base, and each positioning part comprises a positioning groove; making a plurality of heat sink fins, and providing a folded piece at each end of the metal sheet body; inserting the ends of a plurality of heat sink fins and their folded pieces into the positioning grooves of the relative positioning parts respectively, so that the relative outer sides of the ends of the heat sink fins and their folded pieces face the two opposite sides of the positioning grooves; punching with a punch toward the end of the folded piece of the relative heat sink fin, punching the folded piece into an extruded deformation body compressed in the end direction, so that the extruded deformation body is formed with an outward expansion part, so as to be squeezed and fixed in the positioning groove and the opposite side of the relative positioning part, so as to achieve a more secure and tight combination effect, improve the processing and assembly quality, and enhance the conduction heat dissipation effect.

Description

Combination method of heat sink fins and base stamping

technical field

The invention relates to a method for manufacturing a heat sink, in particular to a method for stamping and combining heat dissipation fins and a base of the heat sink.

Background technique

With the rapid development of the computer industry, the execution speed of heat sources such as chips and central processing units (CPUs) is getting faster and faster, and the heat of the corresponding heat sources is also getting higher and higher. In order to discharge the high temperature generated by the heat source to the outside , so that the heat source can operate normally at the allowable temperature, usually a radiator with a larger area is attached to the heat overflow surface of the heat source, so as to use the multiple fins of the radiator to assist in heat dissipation.

As shown in Figure 1 and Figure 2, most of the existing radiators 9 include a flat base 91 and a plurality of fins 92, the base 91 and the fins 92 are metals with good thermal conductivity such as copper or aluminum. material, the base 91 has a plurality of parallel grooves 93, and the fins 92 are all sheet-shaped bodies, the lower edge of the fins 92 are placed into the grooves 93 of the base 91, and then The fins 92 are fixed on the base 91 by riveting.

During the riveting process shown in FIG. 2 , the punch 96 punches the clamping rib 95 outside the groove 93 to produce metal plastic deformation, and previously clamps the fin 92 and the reflexed portion 94 inside. However, during stamping and riveting, the plastically deformed parts 97 of each clamping rib 95 are more likely to break and cause poor clamping. In addition, when the punch 96 punches the clamping rib 95 downward, it is also prone to deflection due to the lateral component force, which relatively affects the plastic deformation of the clamping rib 95 , resulting in poor clamping. Therefore, how to improve the above-mentioned problems and defects is the direction of research and development that the relevant industry is eager to study.

Contents of the invention

The main purpose of the present invention is to provide a stamping combination method of radiator fins and bases, which utilizes the direct stamping combination method to stamp the reflexed pieces of the heat dissipation fins into extruded deformation bodies and extended outward expansion parts to squeeze It is forced to be fixed in the positioning groove of the base to achieve a more reliable and tight bonding effect, improve the quality of processing and assembly, and further enhance the conduction and heat dissipation effect, and is suitable for automated mass production.

In order to achieve the above-mentioned purpose, the stamping combination method of the radiator fin and the base of the present invention includes the following steps: making a base, and setting a plurality of positioning parts at intervals on the surface of the metal base, and each positioning part includes a positioning groove; Make a plurality of heat dissipation fins, and set a reflexion piece at each end of the metal sheet body; insert the ends of the plurality of heat dissipation fins and their reflexion pieces into the positioning grooves of the relative positioning parts, so that the ends of the heat dissipation fins The opposite outer sides of the reflexion sheet are facing the two opposite sides of the positioning groove; the punch is punched towards the end of the reflexion sheet of the relative heat dissipation fin, and the reflexion sheet is punched into an extruded deformed body compressed in the direction of the end, so that The extruded deformable body is formed with an outwardly expanding portion to squeeze the positioning slot fixed on the opposite positioning portion and its opposite side.

In a preferred embodiment, a positioning recess is provided on one side of the positioning grooves of each positioning portion of the base, so that the extruded deformable body of the heat dissipation fin is squeezed and fixed to the positioning portion of the opposite positioning portion by the outwardly expanding portion. The concave part achieves a firm and tight combination.

Further, the two opposite sides of each positioning groove of the base are extended as a first convex rib and a second convex rib to protrude from the surface of the metal base to form a positioning part, and the inner side of the second convex rib is used to fix the relatively extruded deformable body; the punch A restricting portion is formed on the outer side to support the outer side of the second rib relative to the positioning portion.

In a preferred embodiment, the extruded deformation bodies of the plurality of heat dissipation fins are stamped into a zigzag shape, so as to be firmly extruded and fixed.

In a preferred embodiment, the minimum width of the positioning grooves of each positioning portion of the base is set to be greater than twice the thickness of the metal sheet of the heat dissipation fins, so as to facilitate the insertion of the heat dissipation fins for stamping assembly.

The present invention utilizes the direct stamping combination method to stamp the reflexed pieces of the heat dissipation fins into extruded deformation bodies and extended outward expansion parts to squeeze and fix them in the positioning grooves of the base, so as to achieve a more reliable and tight combination effect and improve the processing efficiency. The quality of the assembly improves the efficiency of conduction and heat dissipation, and it is suitable for automated mass production.

Description of drawings

FIG. 1 is a schematic diagram of inserting fins of a conventional radiator into grooves of a base.

FIG. 2 is a schematic diagram of normal and bad stamping conditions during the riveting process following FIG. 1 .

Fig. 3 is a structural view of the heat sink fin and base stamping combination in a preferred embodiment of the present invention.

FIG. 4 is a schematic diagram of inserting the heat dissipation fins into the positioning slots of the base by means of folded pieces as shown in FIG. 3 .

FIG. 5 is a schematic diagram of various punching conditions of the reflexed sheet following the heat dissipation fin shown in FIG. 4 .

FIG. 6 is a three-dimensional exploded view of the cooling fins and the base as shown in FIG. 4 .

FIG. 7 is a perspective view of another shape of the heat dissipation fin shown in FIG. 4 .

Fig. 8 is a schematic diagram of punching with the punch facing down as shown in Fig. 5 .

Fig. 9 is a schematic diagram of continuing Fig. 8 and punching the reflexed piece downward to form an extruded deformed body.

FIG. 10 is a schematic diagram of another extruded deformable body as shown in FIG. 9 .

FIG. 11 is a structural view of the stamping combination of the radiator fins and the base in another preferred embodiment of the present invention.

Description of main component symbols:

1. Base 11. Metal base

12. Positioning part 13. The first convex rib

14. Second convex rib 15. Locating groove

16. Positioning recess

2. Heat dissipation fins 21. Metal body

22. Reflexion piece 23. Reflexion piece

24. Extrusion deformation body 25. Outward expansion part

26. Extruded deformed body

3. Punch 31. Stamping end

32. Department of Restrictions

4. Base 41. Positioning part

42, positioning groove.

Detailed ways

Relevant present invention is to achieve above-mentioned purpose, adopts technical means and effect thereof, enumerates feasible embodiment hereby, and cooperates accompanying drawing to illustrate as follows:

First, please refer to Fig. 3, the radiator of the present invention mainly assists the heat source of the electronic device to dissipate heat. , and then carry out stamping combination and fixation for each cooling fin 2 .

In the preferred embodiment shown in Fig. 3, Fig. 4 and Fig. 5, the present invention is mainly aimed at the stamping combination method of the cooling fins 2 and the base 1 of the radiator, as shown in the figure, a base 1 is produced A plurality of positioning portions 12 are arranged at equal intervals on the surface of the metal base 11, and each positioning portion 12 includes a first rib 13 and a second rib 14 opposite to each other, and a positioning groove 15 is formed between them. That is, the first rib 13 and the second rib 14 extend from opposite sides of each positioning groove 15 of the base 1 to protrude from the surface of the metal base 11 to form the positioning portion 12 .

Manufacturing and producing a plurality of cooling fins 2, each end of the metal body 21 of each cooling fin 2 is bent with a reflex sheet 22 (referring to Fig. 4 and Fig. 6 ). In addition, as shown in FIG. 7 , the ends of the cooling fins 2 may be extended and provided with a plurality of folded pieces 23 at intervals.

In the actual assembly process, as shown in Figures 3 to 7, the ends of the heat dissipation fins 2 and the reflexed pieces 22 or 23 are respectively inserted into the positioning grooves 15 of the relative positioning part 12 of the base 1, and the heat dissipation fins The opposite outer sides of the end of the sheet 2 and its reflexed sheet 22 face to the two opposite sides of the positioning groove 15 , that is, to the inner side of the first rib 13 and the second rib 14 .

Please continue to refer to Fig. 5, Fig. 8 and Fig. 9, stamp the end of the reflexed piece 22 of the heat dissipation fin 2 with the stamping end 31 of the punch 3 of the stamping equipment downward, and stamp the reflexed piece 22 of the heat dissipation fin 2 into an end. The extruded deformable body 24 compressed in the central direction makes the extruded deformable body 24 form an outward expansion part 25 to squeeze the inner side of the second convex rib 14 fixed on the positioning part 12 and the positioning groove 15 and its opposite side to achieve a more The firm and tight bonding effect can improve the quality of processing and assembly, and enhance the effect of conduction and heat dissipation.

Continue to describe the stamping combination method of the cooling fins 2 and the base 1 of the present invention. As shown in FIGS. 2 double thickness of the sheet metal body 21, to facilitate insertion and assembly. In a preferred embodiment, the inner side of the second rib 14 of each positioning portion 12 of the base 1 and the opposite side of the positioning groove 15 can be provided with a positioning recess 16 to fix the direction of the relative extruded deformation body 24 of the cooling fin 2. The outer expansion part 25 and the outer side of the punch 3 can be provided with a restricting part 32 to support the outer side of the second rib 14 relative to the positioning part 12 to achieve a more secure fixed connection. In addition, as shown in FIG. 10 , the extruded deformable body 26 of each cooling fin 2 can be punched into a zigzag shape, so as to be firmly squeezed and fixed.

Please refer to another preferred embodiment shown in FIG. 11 , the base 4 is made into a circular body, and a plurality of positioning parts 41 and their positioning grooves 42 are arranged at intervals on the outer peripheral surface, so as to insert relative heat dissipation fins respectively. The sheet 2 is then stamped to make the extruded deformable body 24 tightly combined with the positioning groove 42 .

In summary, the present invention can solve the deficiencies and defects of the prior art, and its key technology is to punch the reflexed sheet 22 of the heat dissipation fin 2 into an extruded deformable body 24 and an outward expansion part 25 to squeeze It is fixed in the positioning groove 15 of the base 1 to achieve a firm and tight bonding effect, further enhance the effect of conduction and heat dissipation, and is suitable for automatic mass production.

The above-mentioned embodiments are only used to illustrate the present invention for convenience, and are not intended to be limiting. Without departing from the spirit of the present invention, various simple changes and modifications that can be made by those skilled in the art should still be included in the claims in the range.

Claims (6)

1. A heat sink fin and base stamping combination method, it is characterized in that, comprising the following steps: making a base, setting a plurality of positioning parts at intervals on the surface of its metal seat body, each positioning part includes a positioning Groove; make a plurality of heat dissipation fins, and each bend at the end of the metal sheet body is provided with a reflexion piece; insert the ends of the plurality of heat dissipation fins and their reflexion pieces into the positioning grooves of the relative positioning parts respectively, so that the heat dissipation fins The end of the sheet and the opposite outer sides of the reflexed sheet are facing the two opposite sides of the positioning groove; the punch is punched toward the end of the reflexed sheet of the opposite cooling fin, and the reflexed sheet is punched into an extruded deformed body compressed in the direction of the end , so that the extruded deformable body is formed with an outwardly expanding portion to squeeze the positioning groove fixed on the opposite positioning portion and its opposite side. 2. The heat sink fin and base stamping combination method according to claim 1, characterized in that, each positioning part of the base sets a positioning recess on one side of the positioning groove, so that the extrusion of the heat dissipation fin The compression-deformable body squeezes the positioning concave part fixed on the relative positioning part with the outward expansion part. 3 . The stamping and assembling method of radiator fins and base according to claim 1 , wherein the plurality of heat dissipation fins stamp the extruded deformation body into a zigzag shape. 4 . 4. The heat sink fin and base stamping combination method according to claim 1, characterized in that, the ends of the plurality of heat dissipation fins are bent at intervals and provided with a plurality of reflexed pieces, which are stamped separately to form extrusion deformation body. 5. The heat sink fin and base stamping combination method according to claim 1, characterized in that, each positioning part of the base sets the minimum width of the positioning groove to be greater than twice the thickness of the metal sheet of the heat dissipation fin . 6. The stamping combination method of radiator fins and base according to claim 1 or 2, characterized in that the two opposite sides of each positioning groove of the base extend as a first convex rib and a second convex rib, so as to protrude from the The surface of the metal seat constitutes a positioning part, and the inner side of the second convex rib is used to fix the relatively extruded deformable body; the outer side of the punch is provided with a limiting part to support the outer side of the second convex rib of the relative positioning part.

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