CN112770612B - Edge-folded heat dissipation plate and machining method thereof - Google Patents

Abstract

The invention relates to the technical field of heat dissipation plates, in particular to a hem type heat dissipation plate and a processing method thereof.

Description

Edge-folded heat dissipation plate and machining method thereof

Technical Field

The invention relates to the technical field of heat dissipation plates, in particular to a hem type heat dissipation plate and a processing method thereof.

Background

The 5G network is laid comprehensively, the base station requirement is improved comprehensively, and the liquid cooling plate used by the base station case integrally has continuous requirements on heat dissipation requirements due to temperature equalization, stable performance and the like. The continuous iterative change of various electronic products leads the research of the heat dissipation type temperature equalizing plate to be deep, and the application of the temperature equalizing heat dissipation plate is greatly promoted.

But current samming heating panel is mostly planar structure, through on heat conduction to the heating panel of heat source, in some specific local spaces, be not convenient for install the heat conduction piece, also be difficult to install the heating panel alone, just need carry out the installation and the heat dissipation of multidimension degree bending in order to adapt to spatial structure to the heating panel according to spatial structure. The existing processing technology for the planar heat dissipation plate mostly adopts hot rolling and blowing, and when the method is adopted to process the heat dissipation plate with a bending structure, the phenomenon of flow channel blockage at a structure bearing part is easy to occur, so that the heat dissipation performance of the heat dissipation plate can not meet related requirements.

Disclosure of Invention

In view of the above problems, embodiments of the present invention are proposed to provide a flanged heat sink and a method of manufacturing the same that overcome or at least partially solve the above problems.

The invention provides a flanged heat dissipation plate, which comprises a front panel and a back panel, wherein the front panel is provided with a plane runner groove in a staggered manner on the end surface, the back panel is superposed on the plane runner groove to form a closed runner, the front panel and the back panel are respectively provided with a first flange and a second flange in a bending manner in the same direction near the edge, the front panel near the first flange is provided with a side runner groove which is sunken towards one side far away from the back panel, the bending portion of the first flange is provided with at least one flanged runner groove which is sunken at the same side as the side runner groove, the front panel between the side runner groove and the flanged runner groove is provided with a contact surface which is butted with the back panel, a drainage channel which is communicated with the flanged runner groove and the side runner groove is arranged between the contact surface and the back panel, the edge side surface of the second flange is butted with the edge side surface of the first flange, so that the folded edge runner groove forms a closed liquid storage space, and the side surface of the first folded edge and the side surface of the second folded edge are both heat source heat absorption parts.

Furthermore, a drainage groove which is far away from the concave part of the front panel is arranged on the side surface of the second folded edge abutted to the contact surface, and two ends of the drainage groove respectively correspond to the side edge runner groove and the folded edge runner groove.

Furthermore, each flanging runner groove is correspondingly provided with at least two drainage grooves respectively.

Furthermore, the first folded edge and the second folded edge are respectively of an L-shaped structure which is bent towards one side close to the back panel, and the edge side of the first folded edge abuts against the bottom of the edge side of the second folded edge.

Furthermore, the first folded edge and the second folded edge are respectively of an L-shaped structure which is bent towards one side close to the front panel, and the edge side face of the second folded edge abuts against the bottom of the edge side face of the first folded edge.

Furthermore, one end of the flanging runner groove extends to the first flanging edge, and an arc step connected in a fairing manner is arranged between the flanging runner groove and the first flanging edge.

Furthermore, brazing structures are arranged between the back panel and the contact surface and between the first folded edge and the second folded edge.

Also provides a method for processing the edge-folded heat dissipation plate, which comprises the following steps:

s1, preparing a front panel and a back panel as a heat dissipating plate material;

s2, blowing the front panel by using a blowing mold to form plane runner grooves arranged in a staggered manner and side runner grooves arranged at the edge parts of the plane runner grooves on the end surface of the front panel;

s3, pressing a flanged runner groove which is recessed in the same direction as the side runner groove by adopting a pressing mold on the edge close to the front plate which is blown, and pressing a drainage groove with two ends respectively corresponding to the side runner groove and the flanged runner groove by adopting a pressing mold on the back plate, wherein a contact surface is arranged between the side runner groove and the flanged runner groove;

s4, bending the front panel close to the axis of the flanging runner duct to obtain a first flanging, and bending the back panel close to the bottom of the drainage duct along the same direction as the first flanging to obtain a second flanging;

and S5, overlapping the front panel and the back panel to form a heat dissipation plate, and soldering and combining the abutting parts between the back panel and the contact surface and between the first folded edge and the second folded edge.

Furthermore, the depth of the edge folding runner groove is 1-1.5 times of the thickness of the front panel.

The embodiment of the invention has the following advantages:

the invention sets a first folded edge on the front panel, sets a folded edge runner groove capable of containing phase change medium on the bending part of the first folded edge, at the same time, sets a second folded edge on the back panel, the second folded edge is connected with the contact surface of the first folded edge non-folded edge runner groove, the edge side surfaces of the two folded edges are connected, thereby forming a folded edge runner surrounding the folded edge runner groove, then, a drainage channel is set between the contact surface and the back panel to connect the folded edge runner groove and the side runner groove, so that the phase change space of the phase change medium in the folded edge runner extends to the runner on the plane end surface of the heat dissipation plate through the drainage channel, when the heat source heat absorption part of the first folded edge or the second folded edge contacts the heat source, the heat source can absorb heat and dissipate quickly, thereby solving the problem that the plane type heat dissipation plate is difficult to install and dissipate in the specific local space.

Drawings

Fig. 1 is a schematic view of the overall structure of a heat sink with a folded edge according to the present invention.

Fig. 2 is an exploded view of the edge-folded heat dissipation plate of the present invention.

Fig. 3 is a partial cross-sectional view of the edge of the heat dissipation plate of the present invention.

Fig. 4 is a flowchart of the steps of a method for processing a heat dissipation plate with a folded edge according to the present invention.

In the figure, 10, a heat dissipation plate; 11. front panel, 12, back panel, 13, side runner groove, 14, contact surface; 15. folding the runner groove; 16. a first folded edge; 17. a second folded edge; 18. and (4) a drainage groove.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1, the edge-folded heat dissipation plate includes a front plate 11 having a front surface on which planar flow channel grooves are alternately formed, and a back plate 12 stacked on the planar flow channel grooves to form a closed flow channel. The planar runner groove is formed in the planar end face of the front panel 11, the front panel 11 with the planar runner groove is obtained by placing a plate to be formed in a blowing die for blowing, the back panel 12 is a planar panel and covers the front panel 11 to enable the runner groove to form a closed runner, a phase change environment is provided for phase change liquid filled in the runner groove, and the runner groove is convenient to carry and arrange in different application scenes.

As shown in fig. 2 and 3, the front panel 11 and the back panel 12 are respectively provided with a first folded edge 16 and a second folded edge 17 by being bent in the same direction near the edge, the front panel 11 near the first folded edge 16 is provided with a side runner groove 13 facing away from the back panel 12 with one side recessed, the bent portion of the first folded edge 16 is provided with at least one folded edge runner groove 15 recessed in the same side as the side runner groove 13, a contact surface 14 abutted against the back panel 12 is arranged between the side runner groove 13 and the folded edge runner groove 15, a drainage channel communicated with the folded edge runner groove 15 and the side runner groove 13 is arranged between the contact surface 14 and the back panel 12, the edge side surface of the second folded edge 17 is abutted against the edge side surface of the first folded edge 16, so that the folded edge runner groove 15 forms a closed liquid storage space, the side surface of the first folded edge 16, The side surfaces of the second flange 17 are heat source heat absorption parts.

Among the above-mentioned technical scheme, crisscross tributary that locates the runner groove on the positive panel 11 plane terminal surface and be close to the edge communicates with above-mentioned side runner groove 13, and the length direction that the edge of positive panel 11 can be followed to the direction that sets up of side runner groove 13 to form the flow circuit that extends to the runner at edge between the runner groove of positive panel 11 both ends.

The existing heat dissipation plate 10 is of a planar structure, and needs to be installed on a heat conduction seat and perform phase change heat dissipation on heat conducted by the heat conduction seat, the heat dissipation plate 10, particularly a heat absorption end on the heat dissipation plate 10, does not directly contact with a heat source, for a heat source with a complex spatial structure or in a narrow area, the heat conduction seat is inconvenient to install, and heat conduction cannot conduct all heat of the heat source to the heat absorption end of the heat dissipation plate 10, so that the heat dissipation effect at the heat source is restricted. In contrast, according to the present invention, the first folded edge 16 is provided on the front panel 11, the folded edge runner groove 15 capable of accommodating the phase change medium is provided on the bent portion of the first folded edge 16, the second folded edge 17 is correspondingly provided on the back panel 12, the second folded edge 17 abuts against the contact surface 14 of the first folded edge 16 non-folded edge runner groove 15, and the edge sides of the two folded edges abut against each other, thereby forming the folded edge runner surrounding the folded edge runner groove 15, and then, the drainage channel is provided between the contact surface 14 and the back panel 12 to communicate the folded edge runner groove 15 with the side runner groove 13, so that the phase change space of the phase change medium in the folded edge runner extends to the runner on the planar end surface of the heat dissipation plate 10 through the drainage channel.

The invention solves the problem that the heat source in a narrow space is inconvenient to install the heat conducting seat by arranging the edge folding structure, and can be directly installed on the heat source by the edge folding structure, namely synchronously solves the installation problem of the heat radiating plate 10 in the narrow space and the heat radiating problem of a special structure. For example, mounting hole locations are arranged on the edges of the first folded edge 16 and the second folded edge 17, and the locking member passes through the mounting hole locations to be connected with a heat source, so that the heat of the heat source is directly absorbed by the heat dissipation plate 10 of the invention, and the heat dissipation effect is obviously improved compared with the conventional heat conduction mode.

In this embodiment, a drainage groove 18 recessed away from the front panel 11 is disposed on a side surface of the second flange 17 abutting against the contact surface 14, and two ends of the drainage groove 18 respectively correspond to the side runner groove 13 and the flange runner groove 15. After the front plate 11 and the back plate 12 are overlapped, the contact surface 14 of the front plate 11 covers the drainage grooves 18 to form the drainage channels in the above embodiments, and the number of the drainage grooves 18 may be set correspondingly according to the number of the hem channel grooves 15 or the external structure to which the side surfaces of the second hem 17 are attached. Wherein, one end of the flow guide is communicated with the edge flow passage of the heat radiating plate 10, i.e., the side flow passage groove 13, and the other end is communicated with the hem flow passage, i.e., the hem flow passage groove 15.

At least two drainage grooves 18 are correspondingly arranged in each flanging runner groove 15. After the front plate 11 and the back plate 12 are overlapped, the hem flow path formed by the hem flow path groove 15 is communicated with the side flow path formed by the side flow path groove 13 through the drainage path formed by the drainage groove 18, and at least two drainage grooves 18 are arranged so as to form backflow between the hem flow path and the side flow path.

After the edge-folded heat dissipation plate 10 of the present invention is installed, the heat source is directly abutted against the side surface of the first edge fold 16 or the second edge fold 17, and the edges of the first edge fold 16 and the second edge fold 17 are tightly connected with the heat source. The phase-change medium such as phase-change liquid filled in the folded edge flow channel can be quickly vaporized in a phase-change way after being heated, and the phase-change medium enters the flow channel on the plane end face of the heat dissipation plate 10 through the drainage channel and the edge flow channel, so that the heat at the heat source is quickly dissipated.

In this embodiment, the first flap 16 and the second flap 17 are each formed in an "L" shape that is bent toward the back panel 12, and the edge side of the first flap 16 abuts against the bottom of the edge side of the second flap 17.

In another embodiment, the first folded edge 16 and the second folded edge 17 are respectively of an "L" shape bent toward a side close to the front panel 11, and an edge side of the second folded edge 17 abuts against a bottom of an edge side of the first folded edge 16.

In the above technical solution, the bending structure of the first folding edge 16 and the second folding edge 17 is not limited to the "L" shape, and may be a "C" shape.

In this embodiment, one end of the folded edge runner groove 15 extends to the first folded edge 16, an arc step connected in a fairing manner is arranged between the folded edge runner groove 15 and the first folded edge 16, the bent side of the folded edge runner groove 15 is parallel to the bent side of the first folded edge 16, and the arc step enables the second folded edge 17 and the folded edge runner groove 15 to form an accommodating space between the end extending to the first folded edge 16, so that the heat dissipation effect of the heat source at the folded edge is further enhanced. In another case, there is no circular step between the first folded edge 16 and the folded edge runner groove 15, that is, the bent portion of the folded edge runner groove 15 is directly connected to the first folded edge 16, one end of the folded edge runner groove 15 extends to the edge of the first folded edge 16, and meanwhile, the second folded edge 17 forms a corresponding structure to be abutted against the first folded edge 16, so that there is no accommodating space between the second folded edge 17 and the folded edge runner groove 15.

In this embodiment, after the front plate 11 and the back plate 12 are stacked, the brazing structures are disposed between the back plate 12 and the contact surface 14 and between the first flange 16 and the second flange 17, and the brazing structures are disposed to combine the portions between the back plate 12 and the contact surface 14 and between the first flange 16 and the second flange 17, so that the flange flow channel 15 forms a space capable of accommodating the phase change medium to prevent leakage.

As shown in fig. 4, the present invention further provides a method for processing a folded edge type heat dissipation plate, including:

s1, preparing the front plate 11 and the back plate 12 as the material of the heat radiating plate 10;

s2, blowing the front panel 11 by using a blowing die to form plane runner grooves arranged in a staggered manner and side runner grooves 13 arranged at the edge parts of the plane runner grooves on the end surface;

s3, pressing a folded edge runner groove 15 which is recessed in the same direction as the side runner groove 13 by adopting a pressing die on the edge of the blown front panel 11, and pressing a drainage groove 18 of which the two ends respectively correspond to the side runner groove 13 and the folded edge runner groove 15 by adopting a pressing die on the back panel 12, wherein a contact surface 14 is arranged between the side runner groove 13 and the folded edge runner groove 15;

s4, bending the front panel 11 close to the axis of the flanging runner duct 15 to obtain a first flanging 16, and bending the back panel 12 close to the bottom edge of the drainage duct 18 in the same direction as the first flanging 16 to obtain a second flanging 17;

s5, the heat sink 10 is formed by stacking the front plate 11 and the back plate 12, and the contact portions between the back plate 12 and the contact surface 14 and between the first flange 16 and the second flange 17 are soldered.

Furthermore, the depth of the folded runner groove 15 is 1-1.5 times of the thickness of the front panel 11, the front panel 11 and the back panel 12 which are overlapped to form the heat dissipation plate 10 in the invention can be made of composite plates, aluminum materials or stainless steel materials, and the like, because the material requirements of the plates avoid the damage to the plate structure when the plates are blown and filled with subsequent phase change liquid, and the depth of the folded runner groove 15 and the depth of other runner grooves are generally not more than 1.5 times of the thickness of the plates.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The edge-folded heat dissipation plate and the processing method thereof provided by the invention are described in detail, and the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (7)

1. A flanged heat dissipation plate comprises a front panel with a planar runner groove staggered on the end surface and a back panel superposed on the planar runner groove to form a closed runner, and is characterized in that the front panel and the back panel are respectively provided with a first flange and a second flange which are bent in the same direction near the edge, the front panel near the first flange is provided with a side runner groove recessed towards one side far away from the back panel, the bent part of the first flange is provided with at least one flanged runner groove recessed at the same side as the side runner groove, the front panel between the side runner groove and the flanged runner groove is provided with a contact surface butted with the back panel, a drainage channel communicated with the flanged runner groove and the side runner groove is arranged between the contact surface and the back panel, the edge side surface of the second flange is butted with the edge side surface of the first flange, so that the flanged runner groove forms a closed liquid storage space, and the side surface of the first flange and the side surface of the second flange are both heat source heat absorption parts;

the side surface of the second folded edge, which is abutted to the contact surface, is provided with a drainage groove which is recessed towards the direction far away from the front panel, two ends of the drainage groove respectively correspond to the side edge runner groove and the folded edge runner groove, and the contact surface of the front panel covers the drainage groove to form the drainage channel;

and the branch streams which are staggered on the plane runner groove on the front panel and are close to the edge are communicated with the side runner groove.

2. The heat dissipating plate of claim 1, wherein at least two of the drainage grooves are disposed in each of the flanged runner grooves.

3. The heat dissipating plate of claim 1, wherein the first and second flanges are each an "L" shaped structure that is bent toward a side near the back plate, and an edge side of the first flange abuts against a bottom of an edge side of the second flange.

4. The heat dissipating plate of claim 1, wherein the first and second flanges are each an "L" shaped structure bent toward a side near the front plate, and an edge side of the second flange abuts against a bottom of an edge side of the first flange.

5. The heat dissipating plate of claim 1, wherein a brazing structure is disposed between the back plate and the contact surface and between the first flange and the second flange.

6. A method for processing a heat radiating plate according to any one of claims 1 to 5, comprising:

s1, preparing a front panel and a back panel as a heat dissipating plate material;

s2, performing inflation on the front panel by using an inflation mould to form plane runner grooves which are arranged in a staggered manner and side runner grooves which are arranged at the edge of the plane runner grooves on the end surface;

s3, pressing a flanged runner groove which is recessed in the same direction as the side runner groove by adopting a pressing mold on the edge close to the front plate which is blown, and pressing a drainage groove with two ends respectively corresponding to the side runner groove and the flanged runner groove by adopting a pressing mold on the back plate, wherein a contact surface is arranged between the side runner groove and the flanged runner groove;

s4, bending the front panel close to the axis of the flanging runner duct to obtain a first flanging, and bending the back panel close to the bottom of the drainage duct along the same direction as the first flanging to obtain a second flanging;

and S5, overlapping the front panel and the back panel to form a heat dissipation plate, and soldering and combining the abutting parts between the back panel and the contact surface and between the first folded edge and the second folded edge.

7. The method of claim 6, wherein the depth of the hem runner channel is 1 to 1.5 times the thickness of the face plate.

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