TW202126978A - A sealing welding method of a multi-chamber uniform temperature plate - Google Patents

Abstract

The disclosure provides a sealing welding method and structure of a multi-chamber uniform temperature plate, the multi-chamber uniform temperature plate includes a flat-plate-shaped aluminum alloy cavity filled with a working fluid, an inside of the aluminum alloy cavity is provided with a plurality of support bodies arranged side by side, two ends of the support bodies are respectively in contact with an upper inner wall and a lower inner wall of the aluminum alloy cavity; the seals at both ends of the aluminum alloy cavity are sealed by a welding process to form welded ends with a smooth surface. according to the sealing welding method of the multi-chamber uniform temperature plate provided by the disclosure, after the sealing end is welded, the invalid end of the uniform temperature plate is shortened, and the sealing performance is further improved, even in the bending process or the actual application of the vibration scene, the sealing end will not leak, so that the uniform temperature plate has a shorter invalid end and a higher reliability.

Description

Sealing welding method of multi-cavity type uniform temperature plate

The invention relates to the technical field of uniform temperature plates, in particular to a sealing welding method of a multi-cavity uniform temperature plate.

At present, the heat conductor using phase change heat transfer technology is usually called copper heat pipe and uniform temperature plate. The working principle of copper heat pipe and uniform temperature plate is as follows: when one end of the copper heat pipe or uniform temperature plate is heated, the heat transfer filled inside it The medium (usually industrial pure water or acetone) will be heated and vaporized into a vapor phase fluid, and the vapor phase fluid quickly transfers heat to the other end of the copper heat pipe or the temperature equalizing plate or other parts through the internal microgroove structure.

When the vapor phase fluid reaches the condensing end, it will condense into a liquid and release the latent heat of vaporization. At this time, the liquid phase fluid will flow back from the internal capillary microgroove group to the heated end. In this way, the continuous condensation and evaporation loop of the medium is realized. The rapid heat transfer and heat dissipation function of the copper heat pipe or the uniform temperature plate. The micro-channel multi-cavity array aluminum uniform temperature plate has a wide range of applications, simple structure, excellent thermal conductivity, raw materials are obtained through molds, and low cost and high cost performance.

As shown in Figure 1, the existing structure of the homogenizing plate is sealed by pressing. The sealing part is only sealed by material deformation, which is easy to leak under high pressure, and the sealing part is extremely sharp and easy to hurt. Leakage failure caused by the opening of the opening, especially in the actual application process, due to the vibration of the machine equipment during the operation, when the uniform temperature plate is in a vibrating environment for a long time, it is easy to resonate with it, resulting in leakage at the seal, and there is more Big safety hazard.

The purpose of the present invention is to provide a sealing welding method and structure for a multi-cavity uniform temperature plate to solve the above-mentioned problems.

The present invention achieves the above objectives through the following technical solutions:

A method for sealing and welding a multi-cavity uniform temperature plate, including the following steps:

Press and seal one end of each cavity of the multi-cavity array type aluminum uniform temperature plate with capillary structure or no capillary structure first to form a sealed end;

Evacuate each cavity of the multi-cavity array type aluminum uniform temperature plate whose one end has been sealed, and pour the working liquid;

Flatten and seal the filling end of the multi-cavity array type aluminum uniform temperature plate that has been filled with working fluid to prevent air from entering or leaking of internal working fluid;

Place the compressed and sealed multi-cavity array type aluminum uniform temperature plate in a low temperature environment to cool down, so that the internal working liquid is solidified;

After the working liquid is solidified, the multi-cavity array type aluminum uniform temperature plate is placed in a vacuum environment for welding to form a welding end.

In a further technical solution, the temperature of the low-temperature environment is lower than the solidification temperature of the working fluid, wherein the temperature of the low-temperature environment is the temperature that can be reached when the multi-cavity array type aluminum uniform temperature plate is cooled by using liquid nitrogen.

In a further technical solution, the vacuum degree of the vacuum environment is less than 10 Pa.

In a further technical solution, the welding method is argon arc welding, laser welding, plasma welding, or cold metal transition welding.

In a further technical solution, after the welding, the welding end of the multi-cavity array aluminum uniform plate has a shorter length than the sealing end.

In a further technical solution, the low-temperature environment is created by using a low-temperature refrigerator or a cold plate to cool the multi-cavity array type aluminum uniform temperature plate.

In a further technical solution, when the cold plate is used to create the low-temperature environment, a metal fixture filled with liquid nitrogen is used to cool the welding end of the multi-cavity array type aluminum uniform temperature plate; a low-temperature refrigerator is used to create the In a low-temperature environment, a metal fixture connected to a low-temperature refrigerator is used to cool the welding end of the multi-cavity array type aluminum uniform temperature plate.

In a further technical solution, when argon arc welding is used, a hollow tungsten needle welding product is used, and argon gas flows out through the cavity of the hollow tungsten needle. In particular, the cavity of the hollow tungsten needle is located in the hollow tungsten needle. The side facing the direction of welding advancement. The cavity of the hollow tungsten needle may also be located in the center of the hollow tungsten needle.

In a further technical solution, after the welding of the multi-cavity array type aluminum uniform temperature plate, the welding end is arc-shaped, and the thickness of each part is uniform or non-uniform.

In a further technical solution, the welding seam of the welding end is wavy or scaly laminated along the welding direction; the diameter of the arc of the welding end is smaller than, or larger than, or equal to the multi-cavity array type aluminum uniform temperature plate thickness of.

The beneficial effects of the present invention are: on the basis of pressing and sealing the two ends of the aluminum alloy cavity, the sealing port is further welded through a welding process to form a smooth surface welded end, preventing the sealing end from cutting hands and hurting people; After the end is welded, the sealing strength is further improved. Even in the bending process or the actual application of the vibration scene, the sealing end will not leak, and the safety of the temperature equalizing plate is improved; at the same time, the present invention provides a new welding process, through freezing The liquid working medium is equipped with a vacuum environment and a welding mechanism cooled by liquid nitrogen to solve the problem of welding surface collapse during welding, so that the sealing strength of the aluminum uniform temperature plate after welding is higher, the invalid length is shorter, the product is more reliable, and the service life is longer. .

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figures 2-4, a multi-cavity array type aluminum uniform temperature plate includes a flat-plate aluminum alloy cavity 1 filled with a working liquid. The two ends of the support body 2 are in contact with the upper inner wall and the lower inner wall of the aluminum alloy cavity 1 respectively; the seals at both ends of the aluminum alloy cavity 1 are sealed by a welding process to form a welding end 3 with a smooth surface.

FIG. 3 is a cross-sectional view of a multi-cavity array type aluminum uniform temperature plate. In an embodiment, the inner wall of the aluminum alloy cavity 1 and/or the surface of the support 2 are uniformly distributed with capillary structures 4.

Fig. 4 is a cross-sectional view of a multi-cavity array type aluminum uniform temperature plate. In an embodiment, the capillary structure 4 is irregularly sawtooth or regular columnar.

Example 1:

As shown in Fig. 5, the arc-shaped diameter of the welding end is smaller than the thickness of the uniform temperature plate.

Example 2:

As shown in Fig. 6, the welding end 3 is in the shape of an arc, and the thickness is uniform everywhere.

Example 3:

As shown in Fig. 7, the welding end 3 is in the shape of an arc, and the diameter of the arc is close to or greater than the thickness of the uniform temperature plate.

Example 4:

As shown in FIG. 8, the welding end 3 is in the shape of a flat plate, and the connection between the welding end 3 and the aluminum alloy cavity 1 is a smooth rounded corner.

In all the above embodiments, the welding seam of the welding end is wavy along the welding direction, or is in the shape of overlapping scales.

Since the uniform temperature plate is under negative pressure at normal temperature, when the seal of the uniform temperature plate is sealed and welded by ordinary welding, because the high temperature of the arc during welding is easy to melt the material, the internal is the uniform temperature of negative pressure The plate sucks the material at the seal inward, causing the welded end to collapse and deform, failing to form a smooth surface.

In order to make the welding end of the uniform temperature plate form the smooth surface in the above-mentioned embodiment, the present invention provides a sealing welding method of a multi-cavity uniform temperature plate, as shown in FIG. 9, including the following steps:

The aluminum alloy cavity 1 blank is pre-treated, and the pre-treatment is ultrasonic cleaning to remove oil and impurities on the surface of the blank and the inside of the cavity, and after the degreasing and impurity removal is completed, it is dried at a drying temperature of 150°C.

The one end of the aluminum alloy cavity 1 with capillary structure or without capillary structure is first pressed and sealed to form a sealed end. Each cavity in the aluminum alloy cavity 1 is evacuated and filled with working fluid, that is, one end Each cavity of the sealed aluminum alloy cavity 1 is evacuated and filled with working fluid; and the other open end is also crushed and sealed, that is, the filling end of the aluminum alloy cavity 1 that has been filled with working fluid is crushed and sealed, Prevent the air from entering or the internal working fluid from leaking out, and form the structure shown in Figure 1. The aluminum alloy cavity 1 processed by the above steps is cooled. During the cooling process, a low temperature environment needs to be created to create a low temperature environment. There are two methods. The first is to use a metal fixture 5 with liquid nitrogen to cool the welding end of a multi-cavity array aluminum uniform temperature plate; the metal fixture 5 includes a liquid nitrogen base heat absorbing block 51 and a liquid nitrogen surface heat absorbing block 52, fixed When the aluminum alloy cavity 1 is placed between the liquid nitrogen base heat absorption block 51 and the liquid nitrogen surface heat absorption block 52 and clamped, the welding gun 6 of the welding equipment is welded above the sealing end; the current is adjusted to 20-200A, welding speed is 50-500mm/min.

The second method of creating a low temperature is to use a low temperature refrigerator to create a low temperature environment, using a metal fixture 5 connected to the low temperature refrigerator to cool the welding end of the multi-cavity array aluminum uniform temperature plate, as shown in FIG. 10.

In order to further improve the quality of welding, while creating a low temperature environment, it is also necessary to create a relatively vacuum environment with a vacuum degree of less than 10Pa; the welding method can be argon arc welding, laser welding, plasma welding, or cold metal transition weld. When argon arc welding is used, a hollow tungsten needle is used to weld the product, and argon gas flows out through the cavity of the hollow tungsten needle. In particular, the cavity of the hollow tungsten needle is located on one side of the hollow tungsten needle and faces the direction of welding advancement. The cavity in the hollow tungsten needle can also be located in the center of the hollow tungsten needle.

After the welding process, the multi-cavity array aluminum uniform temperature plate can be formed into a variety of structures as shown in Figure 2. As a whole, the length of the two welding ends is shorter than the length of the sealing end, and it is smoother and rounder without cutting hands. The reason is the low temperature environment. It effectively absorbs a large amount of heat generated during the welding process, thereby ensuring that the working liquid inside the multi-cavity array aluminum uniform temperature plate will not melt during the welding process, and ensuring that the welding end forms a smooth surface during the welding process. Will not be interfered by the working fluid, thus ensuring the welding quality.

Specifically, a method for sealing and welding a multi-cavity uniform temperature plate disclosed in the embodiment of the present invention includes the following steps: connecting one end of each cavity of a multi-cavity array type aluminum uniform temperature plate with an existing capillary structure or no capillary structure First press and seal to form a sealed end; vacuum each cavity of the multi-cavity array aluminum uniform temperature plate whose one end has been sealed and fill with working fluid; fill the multi-cavity array aluminum uniform temperature plate with the working fluid The end is compressed and sealed to prevent air from entering or internal working fluid from leaking out; the compressed and sealed multi-cavity array aluminum homogenizing plate is placed in a low temperature environment to cool down, so that the internal working fluid is solidified; after the working fluid is solidified, the multi-cavity array The aluminum uniform temperature plate is welded in a vacuum environment to form a welded end.

Wherein, the temperature of the low-temperature environment is lower than the solidification temperature of the working fluid, and the temperature of the low-temperature environment is the temperature that can be reached when the multi-cavity array type aluminum uniform temperature plate is cooled by using liquid nitrogen.

Wherein, the vacuum degree of the vacuum environment is less than 10 Pa.

Wherein, the welding method of the welding is argon arc welding, or laser welding, or plasma welding, or cold metal transition welding.

Wherein, after the welding, the welding end of the multi-cavity array type aluminum uniform temperature plate has a shorter length than the sealing end.

Wherein, the low-temperature environment is constructed by using a low-temperature refrigerator or a cold plate to cool the multi-cavity array type aluminum uniform temperature plate.

Wherein, when the cold plate is used to create the low-temperature environment, a metal fixture filled with liquid nitrogen is used to cool the welding end of the multi-cavity array type aluminum uniform temperature plate; when a low-temperature refrigerator is used to create the low-temperature environment, A metal fixture connected to a low-temperature refrigerator is used to cool the welding end of the multi-cavity array type aluminum uniform temperature plate.

Wherein, the welding method is argon arc welding, a hollow tungsten needle welding product is used, argon gas flows out through the cavity of the hollow tungsten needle, and the cavity of the hollow tungsten needle is located on one side of the hollow tungsten needle , Toward the direction of welding advancement, or the cavity of the hollow tungsten needle is located in the center of the hollow tungsten needle.

Wherein, after the welding of the multi-cavity array type aluminum uniform temperature plate, the welding end is arc-shaped, and the thickness of each part is uniform or not uniform.

Wherein, the welding seam of the welding end is wavy along the welding direction, or is in the shape of overlapping scales; the diameter of the arc of the welding end is smaller than, or greater than, or equal to the thickness of the multi-cavity array type aluminum uniform temperature plate.

So far, specific examples have been used in this article to illustrate the principles and implementation of the present invention. The descriptions of the above examples are only used to help understand the methods and core ideas of the present invention; at the same time, for those of ordinary skill in the art, according to The idea of the present invention will have changes in the specific implementation and scope of application. In summary, the content of this specification should not be construed as a limitation to the present invention. The scope of protection of the present invention should be in the scope of the attached patent application. Prevail.

1: Aluminum alloy cavity 11: Sealed end 2: Support 3: Welding end 4: Capillary structure 5: Metal fixture 51: base heat-absorbing block 52: Surface heat-absorbing block 6: Welding gun

Fig. 1 is a schematic diagram of the structure of the prior art after the two ends of the uniform temperature plate are pressed and sealed. Fig. 2 is a schematic diagram of the structure of a multi-cavity array type aluminum uniform temperature plate. Fig. 3 is a schematic diagram of the cross-sectional structure of the multi-cavity array type aluminum uniform temperature plate of the present invention. 4 is a schematic diagram of the cross-sectional structure of the multi-cavity array type aluminum uniform temperature plate of the present invention. Fig. 5 is a schematic diagram of the structure of Embodiment 1 of the present invention. Fig. 6 is a schematic structural diagram of Embodiment 2 of the present invention. Fig. 7 is a schematic structural diagram of Embodiment 3 of the present invention. Fig. 8 is a schematic structural diagram of Embodiment 4 of the present invention. Fig. 9 is a schematic diagram of the structure of the multi-cavity array type aluminum uniform temperature plate of the present invention before welding. FIG. 10 is a schematic diagram of the structure of the multi-cavity array type aluminum uniform temperature plate of the present invention after welding.

1: Aluminum alloy cavity

5: Metal fixture

6: Welding gun

11: Sealed end

51: base heat-absorbing block

52: Surface heat-absorbing block

Claims (10)

A method for sealing and welding a multi-cavity uniform temperature plate, which includes the following steps: Put one cavity of each cavity of the multi-cavity array type aluminum uniform temperature plate with capillary structure or no capillary structure The end is pressed and sealed first to form a sealed end; Vacuum and perfuse each cavity of the multi-cavity array aluminum uniform temperature plate whose one end has been sealed As liquid Flatten and seal the pouring end of the multi-cavity array aluminum uniform temperature plate filled with working fluid to prevent Air enters or internal working fluid leaks; Put the compressed and sealed multi-cavity array aluminum uniform temperature plate in a low temperature environment to cool down, so that the internal work For liquid solidification; After the working liquid is solidified, the multi-cavity array type aluminum uniform temperature plate is placed in a vacuum environment for welding, Form the welding end. The method for sealing and welding a multi-chamber uniform temperature plate according to claim 1, wherein the temperature of the low-temperature environment is lower than the solidification temperature of the working fluid, wherein the temperature of the low-temperature environment is that liquid nitrogen is used to cool the The temperature that can be reached when the multi-cavity array type aluminum uniform temperature plate is used. The method for sealing and welding a multi-chamber uniform temperature plate according to claim 1, wherein the vacuum degree of the vacuum environment is less than 10 Pa. The sealing welding method of a multi-chamber uniform temperature plate according to claim 1, wherein the welding method is argon arc welding, or laser welding, or plasma welding, or cold metal transition welding. The method for sealing and welding a multi-cavity type uniform temperature plate according to claim 1, wherein, after the welding, the welding end of the multi-cavity array type aluminum uniform temperature plate is shorter than the length of the sealing end. The method for sealing and welding a multi-cavity uniform temperature plate according to claim 2, wherein the low-temperature environment is created by using a low-temperature refrigerator or a cold plate to cool the multi-cavity array aluminum uniform temperature plate. The method for sealing and welding a multi-cavity uniform temperature plate according to claim 6, wherein, when the cold plate is used to create the low-temperature environment, a metal fixture filled with liquid nitrogen is used to cool the multi-cavity array aluminum uniform The welding end of the warm plate; when a low-temperature refrigerator is used to create the low-temperature environment, a metal fixture connected to the low-temperature refrigerator is used to cool the welding end of the multi-cavity array type aluminum uniform temperature plate. The sealing welding method of a multi-cavity uniform temperature plate as described in claim 4, wherein the welding method is argon arc welding, a hollow tungsten needle welding product is used, and argon gas passes through the cavity of the hollow tungsten needle When flowing out, the cavity of the hollow tungsten needle is located on one side of the hollow tungsten needle, facing the welding advancement direction, or the cavity of the hollow tungsten needle is located at the center of the hollow tungsten needle. The method for sealing and welding a multi-cavity uniform temperature plate according to claim 1, wherein, after the welding of the multi-cavity array aluminum uniform temperature plate, the welding end is arc-shaped, and there are The thickness is uniform or not uniform. The sealing welding method of a multi-cavity uniform temperature plate according to claim 1, wherein the welding seam of the welding end is wavy along the welding direction, or is in the shape of scaly lamination; the diameter of the arc of the welding end is smaller than, Or greater than or equal to the thickness of the multi-cavity array type aluminum uniform temperature plate.

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