Fin Heat Sink with Improved Structure and Processing Method Thereof
The invention relates to the technical field of heat sinks, in particular to a fin heat sink with an improved structure and a processing method thereof. The fin heat sink with the improved structure comprises a pedestal and a plurality of cooling fins, wherein roots of the cooling fins are connected with the pedestal and provided with clamping grooves the bottoms of which are opened; clamping pieces corresponding to the clamping grooves are extended out of the pedestal; the cooling fins are clamped and connected with the clamping pieces through the clamping grooves; and the plurality of the cooling fins are subjected to layered arrangement to form a cooling fin group. The clamping grooves at the roots of the cooling fins are easy to mold through a die; the clamping pieces extended out of the pedestal are simple and convenient to process; the clamping grooves are connected with the clamping pieces by means of clamping, so the connection between the clamping grooves and the clamping pieces is reliable; and the clamping process can be completed through a stamping die. Therefore, compared with the prior art, the fin heat sink with the improved structure and the processing method thereof, which are provided by the invention, overcome the technical prejudice and can greatly reduce the processes, reduce the production cost and improve the production efficiency.
The invention relates to the technical field of heat sinks, in particular to a fin heat sink with an improved structure and a processing method thereof.
BACKGROUND OF THE INVENTIONWith the development of the technology, the size of electronic products is smaller and smaller, and correspondingly the heat productivity of unit space is higher and higher. Therefore, higher requirement on heat dissipation is required to be met. Heat sinks have become essential accessories of certain electronic products. A commonly used heat sink mainly comprises a pedestal and a plurality of fin groups with the functions of heat transfer and dissipation, wherein each fin group comprises a plurality of fins subjected to layered arrangement, and the heat sink can also be provided with a heat pipe to enhance the cooling effect.
The contact area between the fins and the pedestal and whether the fins and the pedestal are firmly connected with each other are important factors affecting the cooling efficiency of the heat sink. Enabling the fins to be connected with the pedestal is a key step in the production process of the heat sink. A common method is to enable the fins to be connected with the pedestal by welding, in which a solder paste or other soldering pastes are required to be taken as a welding medium, and nickel plating processing is sometimes required to be performed based on the materials of the fins and the pedestal. For example, the Chinese invention patent application, with the Application No. “200410003352.9” and the invention title “METHOD FOR PREPARING HEAT SINK BY WELDING”, discloses a method for connecting fins and a pedestal by welding.
The above welding method has the disadvantages of complex process, high cost, low production efficiency and environment-unfriendly property. Therefore, another common method is to improve the structure of the pedestal and the fins and enable the fins to be connected with the pedestal by embedding, riveting or other mechanical connection means. For example, the Chinese utility model patent with the patent No. “03279661.7” and the patent title “HEAT SINK STRUCTURE”, the Chinese utility model patent with the patent No. “200620063119.4” and the patent title “IMPROVED ASSEMBLY OF FINS AND PEDESTAL FOR HEAT SINK”, and the like. The method is to arrange various independent fins in succession into the pedestal which is provided with grooves in advance, apply a die to extrude the grooves to enable the grooves to be deformed, and enable flaky roots of the fins and the deformed grooves to form interference fit, so as to enable the fins to be fixedly connected with the pedestal. The process has the disadvantages that: not only the grooves are difficult to process but also the process for extruding the grooves through the die is inconvenient and time-consuming and has high defective rate due to small gaps between the fins. Therefore, although the method has certain advantages compared with the method for preparing the heat sink by welding, the method has the disadvantages of complex process, inconvenient processing and high cost. Moreover, the contact area between the flaky roots of the fins and the pedestal is limited so as to affect the heat transfer efficiency.
SUMMARY OF THE INVENTIONThe invention aims to provide a fin heat sink with an improved structure and a processing method thereof for overcoming the defects in the prior art. The fin heat sink with the improved structure has the advantages of scientific structure, low production cost and high production efficiency.
In order to achieve the aim, the invention provides a fin heat sink with an improved structure, which comprises a pedestal and a plurality of cooling fins, wherein roots of the cooling fins are connected with the pedestal and provided with clamping grooves the bottoms of which are opened; clamping pieces corresponding to the clamping grooves are extended out of the pedestal; the cooling fins are clamped and connected with the clamping pieces through the clamping grooves; and the plurality of the cooling fins are subjected to layered arrangement to form a cooling fin group.
The clamping groove comprise a clamping and connecting groove and a connecting groove which are communicated with each other, wherein the connecting groove is close to the pedestal; and the maximum width of the clamping and connecting groove is more than the minimum width of the connecting groove.
One end of the clamping groove close to the roots of the cooling fins is rectangular and the other end of the clamping groove is circular or rectangular.
The clamping groove is in the shape of a trapezoid, and one end of the clamping groove close to the roots of the cooling fins is a short bottom edge of the trapezoid.
The number of the clamping grooves is at least two; the clamping grooves are rectangular; and side faces of different clamping grooves are nonparallel to each other.
Clamps are extended out of one sides of the clamping grooves and sleeved with the clamping pieces; and the height of the clamps is equal to or less than the distance between adjacent cooling fins.
The fin heat sink is further provided with a heat pipe, wherein one end of the heat pipe passes through the cooling fin group and the other end of the heat pipe is connected with the pedestal.
The cooling fins are provided with bending parts the bending width of which is equal to the distance between the adjacent cooling fins.
Fastening pieces sleeved with the heat pipe are molded at joints of the cooling fins and the heat pipe.
The invention also provides a method for processing the fin heat sink, which comprises the following steps of:
- (1) preparing a pedestal, in which the pedestal is connected with convex clamping pieces which are arranged on cooling end faces of cooling fins, and the clamping pieces are extended along straight lines parallel to the cooling end faces;
- (2) stamping the cooling fins and preparing the cooling fins through a stamping die, in which clamping grooves the bottoms of which are opened are stamped and molded at roots of the cooling fins and clamped and connected with the clamping pieces of the pedestal; and
- (3) performing assembly, in which the plurality of the cooling fins are clamped and connected with the clamping pieces through the clamping grooves in succession.
The stamping die is a progressive die; the prepared pedestal is arranged inside a lower die of the progressive die; the extension direction of the clamping pieces is consistent with the stamping direction of a punch press; and the progressive die stamps down the stamped and molded cooling fins to enable the cooling fins to be sleeved with the clamping pieces through the clamping grooves.
The fin heat sink comprises a heat pipe which is “U”-shaped; the heat pipe and the prepared pedestal are arranged inside the lower die of the progressive die together; one end of the heat pipe is vertical; and the cooling fins are sleeved with the heat pipe through the punch press.
The pedestal is molded by a process of extruding, casting or cutting.
The clamping pieces and the pedestal are integrated into a whole.
The clamping pieces and the pedestal are separable; the pedestal is provided with grooves; and roots of the clamping pieces are connected with the pedestal through the grooves.
The clamping grooves are provided with clamps through stamping molding; and the clamps are in tight fit with the clamping pieces.
Fastening pieces are stamped and molded in sleeved positions of the cooling fins and the heat pipe and sleeved with the heat pipe.
The cooling fins are provided with bending parts by stamping.
The heat sink provided by the invention has the advantages that: the heat sink comprises a pedestal and a plurality of cooling fins, wherein roots of the cooling fins are connected with the pedestal and provided with clamping grooves the bottoms of which are opened; clamping pieces corresponding to the clamping grooves are extended out of the pedestal; the cooling fins are clamped and connected with the clamping pieces through the clamping grooves; and the plurality of the cooling fins are subjected to layered arrangement to form a cooling fin group. The clamping grooves at the roots of the cooling fins are easy to mold through a die; the clamping pieces extended out of the pedestal are simple and convenient to process; the clamping grooves are connected with the clamping pieces by means of clamping, so the connection between the clamping grooves and the clamping pieces is reliable; and the clamping process can be completed through a stamping die. Therefore, compared with the prior art, the fin heat sink provided by the invention overcomes the technical prejudice and can greatly reduce the processes, reduce the production cost and improve the production efficiency.
The processing method provided by the invention has the advantages that: the processing method comprises the following steps of: (1) preparing a pedestal, in which the pedestal is connected with convex clamping pieces which are arranged on cooling end faces of cooling fins, and the clamping pieces are extended along straight lines parallel to the cooling end faces; (2) stamping the cooling fins and preparing the cooling fins through a stamping die, in which clamping grooves the bottoms of which are opened are stamped and molded at roots of the cooling fins and clamped and connected with the clamping pieces of the pedestal; and (3) performing assembly, in which the plurality of the cooling fins are clamped and connected with the clamping pieces through the clamping grooves in succession. The processing process can be completed through the die; the processing speed is fast; the assembly of the cooling fins and the pedestal is convenient; and the cooling fins and the pedestal do not require welding. Therefore, compared with the prior art, the processing method provided by the invention overcomes the technical prejudice and can greatly reduce the processes, reduce the production cost and improve the production efficiency.
The drawings are attached to provide further description of the invention.
Embodiment 1As illustrated in
Two methods are mainly provided for connecting the cooling fins 2 and the pedestal 1 in the prior art. One method is as follows: the cooling fins 2 are connected with the pedestal 1 by means of welding; a welding part is required to be subjected to nickel plating processing in the process; a solder paste is required to be used in the welding process; and the welding process is complex so that the quality is difficult to guarantee. The other method is as follows: a plurality of grooves are arranged on the pedestal 1 and connected with the cooling fins 2 after the grooves are extruded and deformed. The process has the disadvantages of inconvenient processing and low production efficiency. The fin heat sink with the improved structure, provided by the invention, improves the method for connecting the cooling fins 2 and the pedestal 1. During the processing, the clamping grooves 21 at the roots of the cooling fins 2 are easy to mold through the die; the clamping pieces 11 extended out of the pedestal are simple and convenient to process; the clamping grooves 21 are connected with the clamping pieces 11 by means of clamping, so that the connection between the clamping grooves 21 and the clamping pieces 11 is reliable; and the clamping process can be completed through the stamping die. Therefore, the fin heat sink with the improved structure, provided by the invention, overcomes the technical prejudice, and can greatly reduce the processes, reduce the production cost and improve the production efficiency when the fin heat sink provided by the invention is processed.
Moreover, as illustrated in
Furthermore, as illustrated in
In order to control the distance between the cooling fins 2, as illustrated in
In order to enhance the heat dissipation of the heat pipe 4, fastening pieces 24 sleeved with the heat pipe 4 are molded at joints of the cooling fins 2 and the heat pipe 4. The fastening pieces 24 are similar to the clamps 22 and also have the functions of fixing and heat dissipation enhancement.
The clamping groove 21 illustrated in the invention has the function of enabling the cooling fins 2 to be clamped and connected with the pedestal 1. A plurality of embodiments are feasible.
When the number of the clamping groove 21 is only one, the clamping groove 21 comprises a clamping and connecting groove and a connecting groove which are communicated with each other, wherein the connecting groove is close to the pedestal 1 and the maximum width of the clamping and connecting groove is more than the minimum width of the connecting groove, so that the clamping piece 11 can be effectively clamped and connected into the clamping groove 21. Of course, the number of the clamping grooves 21 can be increased. As illustrated in
When the number of the clamping grooves 21 is more than one, other embodiments are also feasible. As illustrated in
The cross section of the pedestal can also be in the shape other than rectangle. When the cross section of the pedestal is cambered as illustrated in
A plurality of clamping grooves 21 can be assembled for use, so as to improve the embodiment 1. As illustrated in
The method for processing the fin heat sink, provided by the invention, comprises the following steps of:
- (1) preparing the pedestal 1, in which the pedestal 1 is connected with convex clamping pieces 11 which are arranged on cooling end faces of the cooling fins 2, and the clamping pieces 11 are extended along straight lines parallel to the cooling end faces;
- (2) stamping the cooling fins 2 and preparing the cooling fins 2 through a stamping die, in which clamping grooves 21 the bottoms of which are opened are stamped and molded at roots of the cooling fins 2 and clamped and connected with the clamping pieces 11 of the pedestal 1; and
- (3) performing assembly, in which the plurality of the cooling fins 2 are clamped and connected with the clamping pieces 11 through the clamping grooves 21 in succession.
More preferably, as illustrated in
Two methods are mainly provided for connecting the cooling fins 2 and the pedestal 1 in the prior art. One method is as follows: the cooling fins 2 are connected with the pedestal 1 by means of welding; a welding part is required to be subjected to nickel plating processing in the process; a solder paste is required to be used in the welding process; and the welding process is complex so that the quality is difficult to guarantee. The other method is as follows: a plurality of grooves are arranged on the pedestal 1 and connected with the cooling fins 2 after the grooves are extruded and deformed. The process has the disadvantages of inconvenient processing and low production efficiency. As for the fin heat sink with the improved structure, provided by the invention, the cooling fins 2 are provided with the clamping grooves 21 through stamping molding; the pedestal 1 is provided with the clamping pieces 11; and the cooling fins 2 are clamped and connected to the pedestal 1 along the extension direction of the clamping pieces 11, and then the assembly of the heat sink can be completed. Therefore, the assembly process is very simple and convenient and can be further completed through the stamping die. The fin heat sink with the improved structure, provided by the invention, overcomes the technical prejudice, and the method provided by the invention can greatly reduce the processes, reduce the production cost and improve the production efficiency when the fin heat sink provided by the invention is processed by the method.
Moreover, as illustrated in
The clamping grooves 21 illustrated in the invention have the function of enabling the cooling fins 2 to be clamped and connected with the pedestal 1. A plurality of embodiments are feasible. The
The pedestal 1 can be subjected to machine shaping by extruding, casting, cutting or other machining means.
In the embodiment, as illustrated in
Furthermore, the clamping grooves 21 are provided with clamps 22 through stamping molding; the clamps 22 are in tight fit with the clamping pieces 11; and the height of the clamps 22 is equal to or less than the distance between the adjacent cooling fins 2. Due to the arrangement of the clamps 22, the contact area between the pedestal 1 and the cooling fins 2 is increased, thereby not only the pedestal 1 and the cooling fins 2 are more firmly connected with each other but also the heat transfer area is increased so that the heat dissipation is enhanced.
Fastening pieces 24 are stamped and molded in sleeved positions of the cooling fins 2 and the heat pipe 4 and sleeved with the heat pipe 4. In order to enhance the heat dissipation of the heat pipe 4, the fastening pieces 24 sleeved with the heat pipe 4 are molded at joints of the cooling fins 2 and the heat pipe 4. The fastening pieces 24 are similar to the clamps 22 and also have the functions of fixing and heat dissipation enhancement.
In order to control the distance between the cooling fins 2, as illustrated in
What needs to be specified is that the fin heat sink processed by the method provided by the invention can adopt a plurality of structures. The fin heat sink as illustrated in
Finally, what needs to be specified is that: the above embodiments are only used for specifying the technical proposal of the invention and not for limiting the scope of protection of the invention. Although detailed description of the invention is given by reference to preferred embodiments, those of ordinary skill in the art shall understand that the technical proposal of the invention can be modified or equivalently replaced without giving up the essence and the scope of the technical proposal of the invention.
Claims
1. A fin heat sink with an improved structure, comprising a pedestal (1) and a plurality of cooling fins (2), wherein roots of the cooling fins (2) connected with the pedestal (1) and provided with clamping grooves (21) the bottoms of which being opened; clamping pieces (11) corresponding to the clamping grooves (21) extended out of the pedestal (1); the cooling fins (2) clamped and connected with the clamping pieces (11) through the clamping grooves (21); and the plurality of the cooling fins (2) subjected to layered arrangement to form a cooling fin group (3).
2. The fin heat sink with the improved structure according to claim 1, wherein the clamping groove (21) comprises a clamping and connecting groove and a connecting groove which are communicated with each other; the connecting groove is close to the pedestal (1); and the maximum width of the clamping and connecting groove is more than the minimum width of the connecting groove.
3. The fin heat sink with the improved structure according to claim 2, wherein one end of the clamping groove (21) close to the cooling fins (2) is rectangular, and the other end of the clamping groove (21) is circular or rectangular.
4. The fin heat sink with the improved structure according to claim 2, wherein the clamping groove (21) is in the shape of a trapezoid, and one end of the clamping groove (21) close to the cooling fins (2) is a short bottom edge of the trapezoid.
5. The fin heat sink with the improved structure according to claim 1, wherein the number of the clamping grooves (21) is at least two.
6. The fin heat sink with the improved structure according to claim 1, wherein the number of the clamping grooves (21) is at least two; the clamping grooves (21) are in the shape of rectangles; and side faces of different clamping grooves (21) are nonparallel to each other.
7. The fin heat sink with the improved structure according to any one of claims 1 to 6, wherein clamps (22) are extended out of one sides of the clamping grooves (21) and sleeved with the clamping pieces (11); and the height of the clamps (22) is equal to or less than the distance between adjacent cooling fins (2).
8. The fin heat sink with the improved structure according to claim 7, wherein the fin heat with the improved structure is further provided with a heat pipe (4); and one end of the heat pipe (4) passes through the cooling fin group (3) and the other end of the heat pipe (4) is connected with the pedestal (1).
9. The fin heat sink with the improved structure according to claim 8, wherein the cooling fins (2) are provided with bending parts (23) the bending width of which is equal to the distance between the adjacent cooling fins (2).
10. The fin heat sink with the improved structure according to claim 9, wherein fastening pieces (24) sleeved with the heat pipe (4) are molded at joints of the cooling fins (2) and the heat pipe (4).
11. A method for processing the fin heat sink, comprising the following steps of:
- (1) preparing a pedestal, in which the pedestal is connected with convex clamping pieces which are arranged on cooling end faces of cooling fins, and the clamping pieces are extended along straight lines parallel to the cooling end faces;
- (2) stamping the cooling fins and preparing the cooling fins through a stamping die, in which clamping grooves the bottoms of which are opened are stamped and molded at roots of the cooling fins and clamped and connected with the clamping pieces of the pedestal; and
- (3) performing assembly, in which the plurality of the cooling fins are clamped and connected with the clamping pieces through the clamping grooves in succession.
12. The method for processing the fin heat sink according to claim 11, wherein the stamping die is a progressive die; the prepared pedestal is arranged inside a lower die of the progressive die; the extension direction of the clamping pieces is consistent with the stamping direction of a punch press; and the progressive die stamps down the stamped and molded cooling fins to enable the cooling fins to be sleeved with the clamping pieces through the clamping grooves.
13. The method for processing the fin heat sink according to claim 12, wherein the fin heat sink comprises a heat pipe which is “U”-shaped; the heat pipe and the prepared pedestal are arranged inside the lower die of the progressive die together; one end of the heat pipe is vertical; and the cooling fins are sleeved with the heat pipe through the punch press.
14. The method for processing the fin heat sink according to claim 13, wherein the pedestal is molded by a process of extruding, casting or cutting.
15. The method for processing the fin heat sink according to claim 11, wherein the clamping pieces and the pedestal are integrated into a whole.
16. The method for processing the fin heat sink according to claim 11, wherein the clamping pieces and the pedestal are separable; the pedestal is provided with grooves; and roots of the clamping pieces are connected with the pedestal through the grooves.
17. The method for processing the fin heat sink according to claim 11, wherein the clamping grooves are provided with clamps through stamping molding; and the clamps are in tight fit with the clamping pieces.
18. The method for processing the fin heat sink according to claim 11, wherein fastening pieces are stamped and molded in sleeved positions of the cooling fins and the heat pipe and sleeved with the heat pipe.
19. The method for processing the fin heat sink according to any one of claims 11 to 18, wherein the cooling fins are provided with bending parts by stamping.
Type: Application
Filed: Aug 4, 2011
Publication Date: Jan 3, 2013
Inventor: Chun-Hung LIN (Dongguan City)
Application Number: 13/198,230
International Classification: F28D 15/04 (20060101); B21D 53/02 (20060101);