CN109458867B - Aluminum alloy die-casting heat sink three-section structure - Google Patents

Abstract

The invention provides a three-section structure of aluminum alloy die-casting heat sinks, including a first heat sink part, a second heat sink part and a third heat sink part arranged in sequence from top to bottom. The first heat sink part, the second heat sink part The vertical cross-sections of the heat sink part and the third heat sink part are both isosceles trapezoids, the lower bottom surface of the first heat sink part is connected to the upper surface of the second heat sink part, and the lower bottom surface of the second heat sink part is connected to the third heat sink part. The upper surfaces of the fin parts are connected, and the included angle between the two side surfaces of the first heat sink fin part is smaller than the included angle between the two side surfaces of the second heat sink fin part. The three-section structure of the aluminum alloy die-casting heat sink provided by the present invention has a smaller cross-sectional area compared with the traditional one-section structure of the aluminum alloy die-casting heat sink, which can effectively reduce the aluminum alloy raw materials and reduce the weight. Easy to transport, suitable for large-scale promotion and application.

Description

Aluminum alloy die-casting heat sink three-section structure

Technical field

The invention relates to a three-section structure of an aluminum alloy die-casting heat sink.

Background technique

At present, the draft angle structure of aluminum alloy die-casting heat sinks is one section drafted to the bottom, with a slope of 1.2 to 1.5° (as shown in Figure 1). The disadvantage is that there are many raw materials for die-cast aluminum alloys and the product is heavy. The cost is high. When the draft angle of the one-piece structure of the traditional aluminum alloy die-casting heat sink is 1.2°, the heat sink has a larger cross-sectional area, resulting in more raw materials and heavier products.

Contents of the invention

The present invention aims to provide a three-section structure of aluminum alloy die-casting heat sinks to solve the problems in the prior art that aluminum alloy die-casting heat sinks require more aluminum alloy raw materials, are heavy products, and have high costs.

The invention provides a three-section structure of aluminum alloy die-casting heat sinks, including a first heat sink part, a second heat sink part and a third heat sink part arranged in sequence from top to bottom. The first heat sink part, the second heat sink part The vertical cross-sections of the heat sink part and the third heat sink part are both isosceles trapezoids, the lower bottom surface of the first heat sink part is connected to the upper surface of the second heat sink part, and the lower bottom surface of the second heat sink part is connected to the third heat sink part. The upper surfaces of the fin parts are connected, and the included angle between the two side surfaces of the first heat sink fin part is smaller than the included angle between the two side surfaces of the second heat sink fin part.

Further, the included angle between the two side surfaces of the second heat sink part is smaller than the included angle between the two side surfaces of the third heat sink part.

Further, the cross section of the first heat sink part is an isosceles trapezoid with an upper base width of 1.4mm, a lower base width of 1.85mm, and a height of 20mm. The cross section of the second heat sink part is an upper base width of 1.85mm, a lower base width of 2.96mm, and a height of 20mm. It is an isosceles trapezoid with a height of 30mm. The cross-section of the third heat sink part is an isosceles trapezoid with an upper base width of 2.96mm, a lower base width of 4.37mm, and a height of 40mm.

The three-section structure of the aluminum alloy die-casting heat sink provided by the present invention has a smaller cross-sectional area compared with the traditional one-section structure of the aluminum alloy die-casting heat sink, which can effectively reduce the aluminum alloy raw materials and reduce the weight. Easy to transport, suitable for large-scale promotion and application.

Description of the drawings

The drawings described here are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 schematically illustrates a side view of a one-piece structure of a traditional aluminum alloy die-casting heat sink given by the background technology of the present invention;

Figure 2 schematically illustrates a side view of the three-section structure of the aluminum alloy die-casting heat sink according to an embodiment of the present invention;

Figure 3 schematically illustrates a front view of the three-section structure of the aluminum alloy die-casting heat sink according to an embodiment of the present invention.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

Referring to Figure 2, an embodiment of the present invention provides a three-section structure of an aluminum alloy die-casting heat sink, including a first heat sink part 1, a second heat sink part 2 and a third heat sink part 3 arranged sequentially from top to bottom. , the vertical cross-sections of the first heat sink part 1, the second heat sink part 2, and the third heat sink part 3 are all isosceles trapezoids, and the lower surface of the first heat sink part 1 and the upper surface of the second heat sink part 2 The lower surface of the second heat sink part 2 is connected to the upper surface of the third heat sink part 3 , and the angle between the two sides of the first heat sink part 1 is smaller than the angle between the two sides of the second heat sink part 2 .

As a more preferred embodiment, the angle between the two side surfaces of the second heat sink part 2 is smaller than the angle between the two side surfaces of the third heat sink part 3 .

The lower bottom width of the first heat sink portion 1 is the same as the upper bottom width of the second heat sink portion 2 , and the lower bottom width of the second heat sink portion 2 is the same as the upper bottom width of the third heat sink portion 3 .

As a specific embodiment of the present invention, the cross section of the first heat sink part 1 is an isosceles trapezoid with an upper base width of 1.4 mm, a lower base width of 1.85 mm, and a height of 20 mm. The cross section of the second heat sink part 2 is an upper base width of 1.4 mm. It is an isosceles trapezoid with a width of 1.85 mm, a lower base width of 2.96 mm, and a height of 30 mm. The cross section of the third heat sink part 3 is an isosceles trapezoid with an upper base width of 2.96 mm, a lower base width of 4.37 mm, and a height of 40 mm.

Taking the specific implementation as an example of the three-section structure of the aluminum alloy die-casting heat sink, the cross-sectional area is calculated as follows:

The cross-sectional area of the first heat sink part 1 is: (1.40+1.85)×20÷2=32.5mm2

The cross-sectional area of the second heat sink part 2 is: (1.85+2.69)×30÷2=68.1mm ²

The cross-sectional area of the third heat sink part 3 is: (2.69+4.37)×40÷2=141.2mm ²

The total cross-sectional area of the three-section structure of the aluminum alloy die-casting heat sink is:

32.5+68.1+141.2＝241.8mm ²

In the three-section structure of the aluminum alloy die-cast heat sink, the draft angle of the first heat sink part 1 located at the bottom is approximately 1.2°, the draft angle of the second heat sink part 2 located in the middle is approximately 0.8°, and the draft angle of the second heat sink part 2 located at the upper part is approximately 0.8°. The draft angle of the third heat sink portion 3 is approximately 0.65°.

The traditional aluminum alloy die-casting heat sink has a one-section structure. One section is drafted to the bottom with a draft angle of 1.2°. Refer to Figure 1. The cross-section is 1.40mm wide at the top, 5.17mm wide at the bottom, and 90mm high. Waist trapezoid, calculate its cross-sectional area:

(1.40+5.17)×90÷2＝295.65mm ²

It can be clearly seen from the calculation results that the three-section structure of the aluminum alloy die-casting heat sink provided by the embodiment of the present invention has a smaller cross-sectional area compared with the traditional one-section structure of the aluminum alloy die-casting heat sink. The area is reduced by as much as 18%, which can effectively reduce aluminum alloy raw materials, reduce weight, facilitate transportation, and is suitable for large-scale promotion and application.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (1)

1. The aluminum alloy die casting radiating fin three-section structure is characterized by comprising a first radiating fin part, a second radiating fin part and a third radiating fin part which are sequentially arranged from top to bottom, wherein the vertical sections of the first radiating fin part, the second radiating fin part and the third radiating fin part are isosceles trapezoids, the lower bottom surface of the first radiating fin part is connected with the upper surface of the second radiating fin part, the lower bottom surface of the second radiating fin part is connected with the upper surface of the third radiating fin part, and the included angle of the two side surfaces of the first radiating fin part is smaller than the included angle of the two side surfaces of the second radiating fin part; the included angle between the two side surfaces of the second radiating fin part is smaller than the included angle between the two side surfaces of the third radiating fin part; the cross section of the first radiating fin part is an isosceles trapezoid with the upper base width of 1.4mm, the lower base width of 1.85mm and the height of 20mm, the cross section of the second radiating fin part is an isosceles trapezoid with the upper base width of 1.85mm, the lower base width of 2.96mm and the height of 30mm, and the cross section of the third radiating fin part is an isosceles trapezoid with the upper base width of 2.96mm, the lower base width of 4.37mm and the height of 40 mm.