CN101480686B - Manufacturing method of cooling fins - Google Patents

Abstract

A method for manufacturing radiating fins applies external force on the surface of the radiating fins by using a stamping method of plastic processing to enable the radiating fins to form more than one concave part after being subjected to plastic deformation, and because the concave part is subjected to plastic deformation, the side surface of the position corresponding to the concave part is in an opposite shape to form a convex part, so that every two radiating fins can be mutually combined through the convex part and the concave part formed on the radiating fins.

Description

Manufacturing method of cooling fins

technical field

The present invention relates to a method for manufacturing heat dissipation fins, in particular to a method for manufacturing heat dissipation fins with rapid combination and repeated assembly.

Background technique

As shown in Figure 1 and Figure 2, in the traditional manufacturing method of heat dissipation fins, the following steps are included:

First carry out step 11, prepare a metal material;

The metal material can be a raw material body 2 of a cooling fin (the material can be aluminum or copper or a material with thermal conductivity) (as shown in Figure 1(A));

Step 12, placing the cooling fin raw material body 2 on the stamping die, and then pressing the raw material body 2 through the stamping die;

Step 13: Punch out the designed shape, which includes the body of the sheet body 2, the side 21 and the hook 211 (as shown in Figure 1(B));

Step 14 bends the sides so that the sides 21 of the sheet 2 and the body of the sheet 2 form an angle of about 90 degrees or vertical (as shown in Figure 1(C));

Step 15 using a jig to stack the cooling fins with the cooling fins;

Let the heat dissipation fin 2 buckle the other heat dissipation fin 2 through the hook 211 of the side 21, so that the two are combined to form a stacked state (as shown in Figure 1 (D)), and the hook on the heat dissipation fin 2 211 bends and hooks inwardly to the other cooling fin 2, so that the two are in a combined state (as shown in Figure 1(E));

The manufacturing method of heat dissipation fins in the prior art is manufactured by forging or stamping, through impact or extrusion, to achieve the required shape and mechanical properties, no matter which method is used, it must first be Cut the body and folded edges first, and form buckles and hooks on the folded edges to combine the buckles into a stacked combination state; therefore, the stacked combination of cooling fins (aluminum or copper) in the industry The method is to fasten the heat dissipation fins by using the stamping die on the side of the sheet body to fold and punch the hooks. The buckling method using the hooks is also different from the product during production. The size of the hooks or The shape and structure are also relatively different, resulting in production errors and deviations in product height and size; and the fins in the prior art are additionally punched or punched out on the folded edge and the buckle and hook, and the hook is independently formed , its overall structural strength is very weak, so the hook is easily deformed when it is adjusted or pulled by an external force, making it extremely difficult to repair or rework, and it cannot be restored to its original state after adjustment or repair; in addition, the existing The heat dissipation fins in the technology are relatively complex in structure, so the experience and technology of the technicians are relatively high during production, so it is time-consuming and easy to produce defective products; Part size requirements are also relatively strict, because the mold parts of this buckle method are relatively small and easy to be damaged, and the mold structure of this buckle method often requires the design of a slider structure to increase the complexity of the mold, so it will increase the mold development time and time for new products. The mold maintenance time in production causes a lot of unnecessary expenses.

So prior art has following shortcoming:

1. The fastening parts of the produced cooling fins are easily deformed;

2. The mold design required for production is relatively complicated and the mold is expensive;

3. High processing cost;

4. The complex processing of the mechanism consumes man-hours;

5. The mold parts are small and easy to damage.

Contents of the invention

The present invention provides a method for manufacturing heat dissipation fins to solve the problem that the fastening parts of heat dissipation fins produced in the prior art are easily deformed, the mold design required for production is relatively complicated, the mold is expensive, the processing cost is high, and the mechanism is complicated. Time-consuming, mold parts are small and easily damaged.

In view of the above-mentioned background of the invention, the traditional manufacturing method of heat dissipation fins requires complex mechanism design, thus causing bottlenecks in output and quality. How to provide a method for manufacturing heat dissipation fins, which can accelerate the production efficiency of heat dissipation fins and improve the manufacturing problems, will effectively improve the quality of heat dissipation fins.

The main purpose of the present invention is to provide a plastic working (Plastic Working) stamping method to process the engaging portion of the cooling fins and improve the shortcomings of the unstable structure of the cooling fins.

The second purpose of the present invention is to provide a heat dissipation fin which can greatly save material compared with the heat dissipation fins in the prior art and will not generate excess waste and waste costs.

Another secondary objective of the present invention is to provide heat dissipation fins with simple structure, simple manufacturing procedures and high production efficiency through continuous manufacturing through simple stamping dies.

In order to achieve the above-mentioned purpose, the present invention proposes a method of manufacturing heat dissipation fins, which is to apply an external force on the surface of heat dissipation fins (aluminum or copper or other materials with thermal conductivity) by using the plastic working (Plastic Working) stamping method. , so that it is plastically deformed to form more than one concave part, because the concave part is subjected to plastic deformation (Plastic deformation), so the position corresponding to the side of the concave part is in the opposite shape to form a convex part, when the heat dissipation fin is connected to another When a heat dissipation fin is stacked, the convex part formed on one heat dissipation fin is combined with the concave part of the other fin to achieve the effect of stacking and snapping; during production operations, if there is a product height dimension The distance between each other can be adjusted by using the jig, because the convex part is a simple snap-fit design integrally formed on the fin plate, and it does not have any joint seam or is formed on the fin hem alone, so Its strength is extremely strong and it is not easy to deform; it is very easy to repair or rework during production or after assembly, and it can easily restore the fins to the original state, so it can effectively reduce the occurrence of defective products; in addition, because it is used in manufacturing The mold of the heat dissipation fins of the present invention has relatively no small parts and complex mold matching design because of the simple structure of the fins, so that it is not easy to produce defects in production, so it has a great effect on the improvement of production capacity;

Compared with the prior art, this invention has the following advantages:

1. The snap-fit design of the product is integrally formed and its strength is high;

2. The mold structure is simple and there are no small parts. The mold is not easy to be damaged;

3. Low mold cost;

4. Simple processing;

5. High production efficiency;

6. Low production cost.

Description of drawings

FIG. 1A is a perspective view of a raw material of a cooling fin in the prior art;

FIG. 1B is a three-dimensional view of the die-cutting process of the heat dissipation fin raw material in the prior art;

FIG. 1C is a perspective view of the appearance after bending the sides of the cooling fins in the prior art;

FIG. 1D is a perspective view of a stacked state of cooling fins in the prior art;

FIG. 1E is a perspective view of a state in which a heat dissipation fin is fastened to another heat dissipation fin in the prior art;

Fig. 2 is the manufacturing flow chart of the schematic diagram of manufacturing heat dissipation fins in the prior art;

Fig. 3 is the manufacturing flow chart of preferred embodiment of the present invention;

Fig. 4 is a schematic diagram of a processing mold of a preferred embodiment of the present invention;

Fig. 5 is a sectional view of a processing mold of a preferred embodiment of the present invention;

Fig. 6 is a perspective view of a heat dissipation fin in a preferred embodiment of the present invention;

Fig. 7 is another side perspective view of the heat dissipation fin of the preferred embodiment of the present invention;

Fig. 8 is a perspective view of stacked cooling fins in a preferred embodiment of the present invention;

FIG. 9 is a cross-sectional view of a stack of cooling fins in a preferred embodiment of the present invention;

Fig. 10 is another preferred embodiment processing mold schematic diagram of the present invention;

Fig. 11 is another preferred embodiment processing mold schematic diagram of the present invention;

Fig. 12 is another preferred embodiment processing die sectional view of the present invention;

Fig. 13 is another preferred embodiment processing die sectional view of the present invention;

Figure 14 is a perspective view of another preferred embodiment of the present invention cooling fins;

Fig. 15 is another side perspective view of the cooling fin of another preferred embodiment of the present invention;

FIG. 16 is a perspective view of stacked heat dissipation fins according to another preferred embodiment of the present invention;

17 is a cross-sectional view of another preferred embodiment of the present invention heat dissipation fin stack;

Fig. 18 is a perspective view of another preferred implementation of the present invention to limit the protrusion;

Fig. 19 is a cross-sectional view of another preferred implementation of the present invention, the combination of the limiting protrusion and the recess;

Fig. 20 is a perspective view of another limiting bump type in another preferred implementation of the present invention;

Fig. 21 is a perspective view of another preferred implementation of the present invention, the limiting convex ring;

Fig. 22 is a perspective view of another preferred embodiment of the limiting convex strip of the present invention;

Fig. 23 is a perspective view of another preferred implementation of the limiting protrusion of the present invention;

Fig. 24 is a schematic diagram of the adjustment jig mechanism in a preferred embodiment of the present invention.

The main component symbols are explained as follows:

Spacing A Height B

Radiating fins 4 Pressured parts 41

Concave part 42 Convex part 43

bump 431 convex ring 432

Raised strip 433 Bump 434

Limiting part 44 Plane 45

Plane 46 Stamping die 5

Master mold 51 mold cavity 511

Male die 52 Punch 53

Adjustment jig 6 Adjustment pressure rod 61

Placement space 62 Adjustment block 63

Detailed ways

In the present invention, plastic working (Plastic Working) is applied to the heat dissipation fins to force the heat dissipation fins to produce plastic deformation (Plastic deformation), and a recess is formed on the heat dissipation fins, and the position corresponding to the side of the recess is in the shape of The opposite form forms a convex portion, and it is better to adopt the stamping method in the present invention for illustration.

In the manufacturing method of cooling fin 4, comprise the following steps:

First carry out step 31 to prepare a metal material;

Provide a raw material for heat dissipation fins 4 (such as aluminum or copper or other materials with thermal conductivity) (as shown in Figure 4);

Step 32 placing the heat dissipation fin raw material on the stamping die;

The stamping die 5 includes a punch 53 and a female mold 51, and the female mold 51 is provided with a mold cavity 511 (as shown in FIGS. 4 and 5 );

Step 33, processing the cooling fins by stamping method of plastic working (Plastic Working);

Because the cooling fins 4 are pressed by the punch 53, plastic deformation occurs and they sink into the mold cavity 511. When the punch 53 completes the stroke, the cooling fins 4 are pressed into the mold cavity 511, and Form the same shape as the mold cavity 511, and then complete the stamping forming. Since the concave portion 42 of the cooling fin 4 is caused by plastic deformation, the back side of the corresponding position of the concave portion 42 is convex outward. Form convex convex portion 43 (as shown in Fig. 5, Fig. 6, Fig. 7);

Step 34 stacking the cooling fins with the cooling fins;

The heat dissipation fin 4 is stacked and assembled by inserting the convex part 43 into the concave part 42 of another heat dissipation fin 4 for a snap (as shown in Fig. 8 and Fig. 9);

Through the design of the protrusions 43 and recesses 42 provided on the heat dissipation fins 4 by the above heat dissipation fin manufacturing method, the complex assembly method of the heat dissipation fins 4 in the prior art can be indeed improved, and the recesses 42 of the heat dissipation fins 4 can pass plasticity. The processing (Plastic Working) stamping method constitutes, so the convex part 43 of the heat dissipation fin 4 is a simple snap-fit design integrally formed on the fin 4 board, and it does not have any joint seam or is formed separately on the fin hem , so it can solve the problem that the hook in the prior art cannot be completely sealed as it was when it was first assembled after being deformed by external force, and is prone to fall off and loose. Simple, the structure design of the mold made by it is also relatively simple structure, so the cost of mold development can be saved, and because the mold has no complicated structure, it is not easy to be damaged and has a long life.

As shown in Fig. 10, Fig. 11, Fig. 12, Fig. 13, Fig. 14, Fig. 15, Fig. 16 and Fig. 17, it is another stamping embodiment of the present invention, in which the cooling fins 4 are processed by the stamping die 5, the The stamping die 5 includes a male mold 52, a female mold 51 and at least one punch 53. The female mold 51 is provided with at least one mold cavity 511. The cooling fins 4 are placed on the female mold 51, and then the male mold 52 The heat dissipation fins 4 are pressed and fixed, and then pressure is applied to the heat dissipation fins 4 through the punch 53 arranged inside the male mold 52. Because the heat dissipation fins 4 are pressed by the punch 53, the pressured part 41 produces plasticity. Deformation (Plastic deformation) and sag into the mold cavity 511, when the punch 53 completes the stroke, the part 41 of the cooling fin 4 under pressure is completely pressed into the mold cavity 511, and forms the same shape as the mold cavity 511, and then completes Stamping, because the recessed part 42 of the heat dissipation fin 4 is plastically deformed, so the back side of the position corresponding to the recess 42 protrudes outward to form a convex part 43, and the heat dissipation fin is completed. 4 is to complete the stacking combination by inserting the convex portion 43 into the concave portion 42 of another heat dissipation fin 4 for an engagement.

As shown in Fig. 18, Fig. 19, Fig. 20, Fig. 21, Fig. 22, and Fig. 23, at least one stopper 44 can be provided on the heat dissipation fin 4, and the heat dissipation fin 4 can be formed by stamping. An external force is applied on the plane 45 to produce plastic deformation (Plastic deformation), and then the limiting portion 44 is formed. When the cooling fins 4 are stacked on each other, the limiting portion 44 can abut against the plane 46 of another cooling fin 4 , it is possible to maintain a fixed distance A between the heat dissipation fin 4 and the other heat dissipation fin 4, and prevent the convex portion 43 from being embedded too deeply when embedded in the concave portion 42 of the other heat dissipation fin 4;

When the cooling fins 4 are stacked on each other, the convex portion 43 is embedded in the concave portion 42 at the corresponding position of the other cooling fin 4, and at least one convex point 431 can be pressed on the convex portion 43 by a stamping die (as shown in FIG. 18 ). The sides that are engaged in the concave portion 42 make the two in an engaged state. The protruding points 431 can be arranged continuously or at the same interval (as shown in FIG. The shape of the protruding ring 432 (as shown in FIG. 20 ) or the shape of a convex strip 433 or a bump 434 (as shown in FIGS. 21 and 22 ) enables the two to be in a tighter engagement state to avoid this When the convex portion 43 is embedded into the concave portion 42 of another heat dissipation fin 4 , it may be embedded too deeply, and can achieve a position-limiting function of maintaining a fixed distance A between the two.

As shown in FIG. 24 , when the cooling fins 4 are stacked and combined with each other, the height B can be adjusted appropriately through the designed adjustment jig 6 , and the stacked cooling fins 4 are placed on the adjustment jig 6 In the placement space 62, by adjusting the adjustment lever 61 to move toward the direction of the heat dissipation fin 4, the adjustment block 63 at the front end of the adjustment pressure lever 61 is in contact with the heat dissipation fin 4, when the height B of the heat dissipation fin 4 is to be adjusted During adjustment, the adjustment block 63 can press the cooling fins 4 by operating the adjustment pressing rod 61, so that the height B reaches the height to be adjusted.

The above disclosures are only a few specific embodiments of the present invention, however, the present invention is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (11)

1. A method for manufacturing heat dissipation fins, comprising the following steps: providing a cooling fin raw material; By applying plastic processing to the raw material of the cooling fin, more than one plastically deformed concave portion is formed, and because the concave portion is subjected to plastic deformation, the corresponding back surface protrudes outward to form a convex portion; and The protrusions formed on the heat dissipation fins can be embedded into the corresponding recesses of another heat dissipation fin for stacking and combination, so that the heat dissipation fins can be stacked and combined with each other; At least one limiting portion is provided on the cooling fin, and the limiting portion is formed by applying an external force on the plane of the cooling fin to generate plastic deformation by applying a stamping method. 2 . The method for manufacturing heat dissipation fins according to claim 1 , wherein the plastic processing can be stamping. 3 . 3 . The manufacturing method of the heat dissipation fin according to claim 1 , wherein at least one bump can be pressed on the convex portion by plastic working so that the fins can be stacked to have a position-limiting function. 4 . 4. The method for manufacturing a heat dissipation fin according to claim 3, wherein the bumps are arranged in a continuous manner. 5 . The method for manufacturing a heat dissipation fin according to claim 3 , wherein the bumps are arranged at the same pitch. 6 . The manufacturing method of the heat dissipation fin according to claim 1 , wherein a protruding ring can be pressed on the convex portion by plastic working so that the fins can be stacked to have a position-limiting function. 7 . 7 . The manufacturing method of the heat dissipation fin according to claim 1 , wherein at least one protrusion can be pressed on the convex portion by plastic working so that the fins can be stacked to have a limiting function. 8 . 8 . The manufacturing method of the heat dissipation fin according to claim 1 , wherein at least one protrusion can be pressed on the convex portion by plastic working so that the fins can be stacked to have a limiting function. 9 . 9 . The method for manufacturing a heat dissipation fin according to claim 1 , wherein the raw material of the heat dissipation fin is a material with thermal conductivity. 10 . The method for manufacturing a heat dissipation fin according to claim 9 , wherein the material with thermal conductivity is copper. 11 . 11. The method for manufacturing a heat dissipation fin according to claim 9, wherein the material with thermal conductivity is aluminum.