A double-sided sealed brazing fixture for a water-cooled radiator and its brazing process

Abstract

The present invention provides a double-sided sealed brazing fixture for a water-cooled row and its brazing process. Among them, the double-sided sealed brazing fixture provides welding assistance for the water-cooled row during the brazing process, and it includes: a base, a piston rod, a clamping member, a reset elastic member, and a filler metal welding sheet. The base is a hollow structure, and an air extraction sleeve and a positioning sleeve are provided on the base. The piston rod is slidably arranged in the air extraction sleeve, the clamping member is sleeved on the piston rod, and the reset elastic member provides an elastic force for the piston rod. A clamping through groove is formed on the air extraction sleeve, and an elastic arm is provided on the clamping member. The elastic arm of the clamping member will deform with the change of temperature, so that the elastic arm clamps or disengages from the clamping through groove. The brazing process is realized based on the above double-sided sealed brazing fixture. The double-sided sealed brazing fixture and brazing process of the present invention can make the filler metal more efficiently fill into the part gap, thereby ensuring the filling integrity, avoiding the generation of holes after welding, and avoiding subsequent leakage phenomena.

Description

Technical Field

[0001] The present invention relates to the technical field of water-cooled radiators, and particularly to a double-sided sealed brazing fixture for a water-cooled radiator and its brazing process. Background Art

[0002] With the development and progress of technology, computers have gradually become an indispensable necessity in people's daily lives. When an electronic device operates, the current in the circuit will generate heat energy due to the influence of impedance. If this heat energy cannot be effectively removed and accumulates on the electronic device, the electronic device may be damaged due to the continuously rising temperature. In order to improve the heat dissipation efficiency of the electronic device, a heat dissipation device is generally used to quickly take away the heat generated by the function expansion card.

[0003] The water-cooling system is a common type of heat dissipation device, and the water-cooled radiator (water radiator) that plays a major role in heat dissipation is included in the water-cooling system. The main structure of the water-cooled radiator 100 is as Figure 1 shown, which includes: a first water chamber 110, a second water chamber 120, and heat dissipation tubes 130. The heat dissipation tubes 130 communicate with the first water chamber 110 and the second water chamber 120. The inside of the first water chamber 110 is divided into an inlet chamber and an outlet chamber. When in use, under the action of pressure, the working coolant flows from the inlet chamber through part of the heat dissipation tubes 130 to the second water chamber 120, and then returns from the second water chamber 120 through the remaining heat dissipation tubes 130 to the outlet chamber of the first water chamber 110. During the process of passing through the heat dissipation tubes 130, the working coolant will dissipate heat into the air, thereby achieving cooling.

[0004] To achieve the circulating flow of the coolant, good sealing needs to be achieved between the heat dissipation tubes 130 and the first water chamber 110 and the second water chamber 120 to prevent the working coolant from leaking. The current sealing method is to weld the heat dissipation tubes 130 to the first water chamber 110 and the second water chamber 120. The welding methods that can be used are friction welding and brazing. However, both welding methods have defects: for example, friction welding easily causes the heat dissipation tubes 130 to be bent and deformed, and also easily destroys the flatness of the contact surfaces of the first water chamber 110 and the second water chamber 120; while in traditional brazing, the filling of the brazing material is likely to have holes, resulting in incomplete sealing and leakage of the working coolant.

[0005] Therefore, how to provide a double-sided sealed brazing fixture for a water-cooled radiator and its brazing process, so that the brazing material can be more efficiently filled into the part gaps during brazing, ensuring the filling integrity, thereby avoiding the generation of holes after welding and preventing the working coolant from leaking, is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] The object of the present invention is to overcome the deficiencies in the prior art and provide a double-sided sealed brazing jig for a water-cooled radiator and its brazing process, which can make the brazing filler metal more efficiently fill into the part gaps during brazing, ensure the filling integrity, thereby avoiding the generation of holes after welding and preventing the working coolant from leaking.

[0007] The object of the present invention is achieved by the following technical solutions:

[0008] A double-sided sealed brazing jig for a water-cooled radiator provides welding assistance for the water-cooled radiator passing through a high-temperature furnace during the brazing process. The water-cooled radiator includes: a first water chamber, a second water chamber, a plurality of heat dissipation tubes, and a fixing frame. The heat dissipation tubes communicate the first water chamber and the second water chamber. The interior of the first water chamber is divided into an inlet chamber and an outlet chamber, and the inlet chamber and the outlet chamber are separated by a partition plate. The fixing frame is sleeved at both ends of the plurality of heat dissipation tubes;

[0009] The double-sided sealed brazing jig includes: a base, a piston rod, a clamping member, a reset elastic member, and a brazing filler metal welding sheet. The base is a hollow structure, and an air extraction sleeve and a positioning sleeve are provided on the base. The piston rod slides in the air extraction sleeve. The clamping member is sleeved on the piston rod, and the reset elastic member provides an elastic force for the piston rod;

[0010] A clamping through groove is provided on the air extraction sleeve, and an elastic arm is provided on the clamping member. The elastic arm of the clamping member deforms with temperature changes, so that the elastic arm clamps or disengages from the clamping through groove;

[0011] The brazing filler metal welding sheet is provided between the fixing frame and the first water chamber, and between the fixing frame and the second water chamber.

[0012] In one embodiment, an inlet interface corresponding to the inlet chamber and an outlet interface corresponding to the outlet chamber are provided on the first water chamber. The air extraction sleeve is sleeved on the inlet interface, the positioning sleeve is sleeved on the outlet interface, and a detachable sealing plug is provided on the positioning sleeve.

[0013] In one embodiment, a piston head is provided at the end of the piston rod. When the piston rod is pressed down, a relatively sealed airtight space is formed between the piston head and the inlet interface in the air extraction sleeve.

[0014] In one embodiment, the reset elastic member is a spring structure, and both ends of the reset elastic member respectively abut against the piston head and the inlet interface.

[0015] In one embodiment, a sealing ring is provided on the piston head, the sealing ring fits on the inner wall of the air extraction sleeve, and lubricating grease is applied on the inner wall of the air extraction sleeve.

[0016] In one embodiment, a kidney-shaped through hole corresponding to the heat dissipation tube is formed in the solder welding sheet, and the solder welding sheet is sleeved on the ends of a plurality of the heat dissipation tubes through the kidney-shaped through hole.

[0017] In one embodiment, a flanging is formed at the edge of the kidney-shaped through hole.

[0018] In one embodiment, the clamping member is a shape memory metal structure. At normal temperature, the elastic arms of the clamping member tend to turn outwards; when the temperature meets the requirements, the elastic arms of the clamping member will contract inwards.

[0019] In one embodiment, the elastic arms of the clamping member are composed of two metals with different coefficients of thermal expansion; at normal temperature, the elastic arms will turn outwards; when the temperature rises, the elastic arms will contract inwards.

[0020] A soldering process for a water-cooled radiator, which is realized based on the above double-sided sealed soldering jig, includes the following steps:

[0021] Step 1: Obtain the solder welding sheet, and sleeve the solder welding sheet on both ends of the heat dissipation tube, so that the solder welding sheet is located between the fixed frame and the first water chamber and between the fixed frame and the second water chamber;

[0022] Step 2: Install the base on the first water chamber;

[0023] Step 3: Press down the piston rod, so that the reset elastic member is compressed, and the elastic arms of the clamping member are clamped with the through groove;

[0024] Step 4: The double-sided sealed soldering jig and the water-cooled radiator pass through a high-temperature furnace together. During this period, the solder welding sheet melts, the elastic arms of the clamping member contract under the influence of temperature, and the reset elastic member bounces the piston rod up, so that the internal air pressure of the first water chamber and the second water chamber suddenly decreases, and then the liquid solder is sucked into the gap.

[0025] In summary, the double-sided sealed soldering jig and the soldering process for a water-cooled radiator of the present invention can make the solder fill the gaps between parts more efficiently during soldering, thereby ensuring the filling integrity, avoiding the generation of holes after welding, and avoiding the leakage of coolant in subsequent work. Description of the Drawings

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of the water-cooled row related to the present invention;

[0028] Figure 2 For Figure 1 It is a partial exploded view of the water-cooled row shown;

[0029] Figure 3 It is a schematic structural diagram of the double-sided sealed brazing fixture and the water-cooled row of the present invention;

[0030] Figure 4 For Figure 3 It is an exploded view of the structure of the double-sided sealed brazing fixture shown;

[0031] Figure 5 For Figure 2 It is a schematic structural diagram of the first water chamber and the solder welding sheet shown;

[0032] Figure 6 It is a schematic diagram of the cooperation relationship between the double-sided sealed brazing fixture and the first water chamber;

[0033] Figure 7 It is a schematic diagram of the cooperation state between the double-sided sealed brazing fixture and the first water chamber during the brazing process;

[0034] Figure 8 It is a partial cross-sectional view of the first water chamber and the solder welding sheet. Detailed implementation manners

[0035] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0038] The present invention provides a double-sided sealed brazing fixture 200 for a water-cooled row, which provides welding assistance for the water-cooled row 100 passing through a high-temperature furnace during the brazing process, enabling the brazing filler metal to more efficiently fill into the part gaps to ensure filling integrity, thereby avoiding the generation of holes after welding and preventing leakage of working coolant during subsequent work processes.

[0039] The structure of the water-cooled row 100 involved in the present invention is as Figure 1 shown, and it includes: a first water chamber 110, a second water chamber 120, a plurality of heat dissipation tubes 130, and a fixing frame 140. The heat dissipation tubes 130 communicate the first water chamber 110 and the second water chamber 120. The interior of the first water chamber 110 is divided into an inlet chamber 111 and an outlet chamber 112. The inlet chamber 111 and the outlet chamber 112 are separated by a partition plate 113, and the fixing frame 140 is sleeved at both ends of the plurality of heat dissipation tubes 130.

[0040] As Figure 3 and Figure 4 shown, the double-sided sealed brazing fixture 200 of the present invention includes: a base 210, a piston rod 220, a clamping member 230, a reset elastic member 240, and a brazing filler metal welding sheet 250 (as Figure 2 and Figure 5 shown). The base 210 is a hollow structure. An air extraction sleeve 211 and a positioning sleeve 212 are provided on the base 210. The piston rod 220 is slidably disposed in the air extraction sleeve 211. The clamping member 230 is sleeved on the piston rod 220, and the reset elastic member 240 provides an elastic force for the piston rod 220.

[0041] Among them, as Figure 4 shown, a clamping through groove 201 is formed on the air extraction sleeve 211. An elastic arm 231 is provided on the clamping member 230. The elastic arm 231 of the clamping member 230 deforms with temperature change, so that the elastic arm 231 clamps or disengages from the clamping through groove 201.

[0042] Preferably, the clamping member 230 is made of shape memory metal. At room temperature, the elastic arms 231 of the clamping member 230 tend to turn outwards. Therefore, when the elastic arms 231 slide to the position of the clamping through groove 201, the ends of the elastic arms 231 will be clamped at the clamping through groove 201, thereby keeping the piston rod 220 in the depressed state. When the temperature meets the requirements, the elastic arms 231 of the clamping member 230 will contract inwards, so as to separate from the clamping through groove 201, enabling the piston rod 220 to have the condition for rising and resetting.

[0043] Moreover, the solder welding sheet 250 is arranged between the fixed frame 140 and the first water chamber 110, and between the fixed frame 140 and the second water chamber 120 (as Figure 2 shown). When passing through the high-temperature furnace (when the ambient temperature rises to the specified temperature), the solder welding sheet 250 will melt into liquid solder, and then fill the gaps between the first water chamber 110 and the heat dissipation tubes 130, and between the second water chamber 120 and the heat dissipation tubes 130, and solidify after cooling to achieve sealed filling. Preferably, the solder welding sheet 250 is provided with waist-shaped through holes 251 corresponding to the heat dissipation tubes 130, and the solder welding sheet 250 is sleeved on the ends of a plurality of heat dissipation tubes 130 through the waist-shaped through holes 251.

[0044] In the water-cooled row 100, as Figure 2 and Figure 5 shown, the first water chamber 110 is provided with a water inlet interface 113 corresponding to the water inlet cavity 111 and a water outlet interface 114 corresponding to the water outlet cavity 112. In this embodiment, as Figure 6 shown, when the double-sided sealed soldering jig 200 is installed on the water-cooled row 100, the air extraction sleeve 211 is sleeved on the water inlet interface 113, the positioning sleeve 212 is sleeved on the water outlet interface 114, and the positioning sleeve 212 is provided with a detachable sealing plug 213. Of course, this matching method is not a fixed combination, and in other embodiments, the air extraction sleeve 211 can also be matched with the water outlet interface 114, and the positioning sleeve 212 can be matched with the water inlet interface 113.

[0045] Preferably, the end of the piston rod 220 is provided with a piston head 221 (as Figure 4 shown). When the piston rod 220 is depressed, a relatively sealed airtight space 202 will be formed between the piston head 221 in the air extraction sleeve 211 and the water inlet interface 113 (as Figure 6 shown). During the soldering process, the volume of the airtight space 202 will change under specific conditions, thereby reducing the air pressure in the first water chamber 110, so that the solder welding sheet 250 is adsorbed and attached to the first water chamber 110 under the action of negative pressure, so as to enable the molten solder to achieve more efficient filling. The specific working principle will be described below.

[0046] Preferably, as Figure 4 andFigure 6 As shown, the reset elastic member 240 is a spring structure, and both ends of the reset elastic member 240 are respectively abutted against the piston head 221 and the water inlet interface 113. After the piston rod 220 is pressed down, the reset elastic member 240 is compressed and stores elastic potential energy.

[0047] Next, in combination with the above structure, the working principle of the double-sided sealed brazing jig 200 of the present invention will be described:

[0048] Before brazing, the water-cooled row 100 needs to be preliminarily assembled. It should be noted that the partition plate 113 is only preliminarily inserted into the first water chamber 110 and is not welded and sealed with the first water chamber 110. Therefore, the water inlet chamber 111 and the water outlet chamber 112 are not completely isolated yet (the two are still a connected whole). First, the worker sleeved the fixed frame 140 onto a plurality of heat dissipation tubes 130, then sleeved the solder welding sheet 250 onto the ends of the heat dissipation tubes 130, and then inserted the first water chamber 110 and the second water chamber 120 into both ends of the heat dissipation tubes 130 respectively. In this way, the solder welding sheet 250 is located between the first water chamber 110 and the fixed frame 140, and between the second water chamber 120 and the fixed frame 140;

[0049] Subsequently, as Figure 6 shown, the base 210 is installed on the first water chamber 110, the air extraction sleeve 211 is sleeved on the water inlet interface 113, the positioning sleeve 212 is sleeved on the water outlet interface 114, and the sealing plug 213 is blocked on the positioning sleeve 212. Then, as Figure 7 shown, the worker presses down the piston rod 220 so that the end of the elastic arm 231 of the clamping member 230 is clamped in the clamping through groove 201, the piston rod 220 remains in the current state, and the reset elastic member 240 is compressed. At this time, in the air extraction sleeve 211, a closed air space 202 is formed between the piston head 221 of the piston rod 220 and the water inlet interface 113, and the volume of this space is relatively small at this time. After installing the double-sided sealed brazing jig 200 in this way, the inside of the first water chamber 110, the inside of the second water chamber 120, and the heat dissipation tubes 130 form a relatively airtight space;

[0050] When brazing, the water-cooled row 100 and the double-sided sealed brazing jig 200 pass through the high-temperature furnace together. When the ambient temperature rises to the specified temperature, the solder welding sheet 250 will melt, and the molten solder (liquid state) will have a capillary flow effect, that is, the liquid solder will fill the brazing seam along the gap. In this way, the liquid solder will fill the gaps between the first water chamber 110 and the heat dissipation tubes 130, and between the second water chamber 120 and the heat dissipation tubes 130;

[0051] Meanwhile, when the ambient temperature reaches the specified temperature, the elastic arm 231 of the clamping member 230 will contract inward, and the elastic arm 231 will be separated from the clamping through groove 201. At this time, the piston rod 220 will quickly move upward (spring up) under the action of the reset elastic member 240. The volume of the airtight space 202 will suddenly increase, thereby generating a negative pressure and reducing the internal air pressure of the water cooling row 100. In this way, the internal air pressures of the first water chamber 110 and the second water chamber 120 will suddenly decrease, and external gas will be supplemented into the first water chamber 110 and the second water chamber 120 from the gaps between the parts. During this process, the liquid solder will be sucked in under the action of the air pressure, so as to further fill the deep parts of the gaps between the first water chamber 110 and the heat dissipation tube 130 and between the second water chamber 120 and the heat dissipation tube 130. In this way, after leaving the high-temperature furnace, the solder solidifies, and the solder filled into the deep parts of the gaps can provide a better sealing effect and a stable connection effect, thereby avoiding the leakage of the working coolant during the subsequent working process;

[0052] After brazing is completed, the base 210 is removed, and then the partition plate 113 is completely inserted into the first water chamber 110, and the partition plate 113 is welded and sealed with the first water chamber 110 to realize the separation of the first water chamber 110 into two independent airtight spaces, namely the water inlet chamber 111 and the water outlet chamber 112. In addition, the solder will also exist between the first water chamber 110 and the fixed frame 140 and between the second water chamber 120 and the fixed frame 140, which also plays a connecting role.

[0053] So far, the basic assembly of the water cooling row 100 is completed. When detecting the airtightness subsequently, the staff can remove the sealing plug 213, then connect the negative pressure vacuum pump to the positioning sleeve 212, and perform a pumping operation on the water cooling row 100. If a good vacuum degree can be achieved, it means that there is no leakage in the water cooling row 100, that is, the sealed welding is realized. Otherwise, it means that the sealing is incomplete and there is a risk of leakage of the working coolant.

[0054] It should be noted that in the prior art, when passing through the high-temperature furnace, the increase in temperature will cause a slight increase in the air pressure in the first water chamber 110 and the second water chamber 120. The gas inside will be blown out to the outside through the gaps between the parts. During this process, the blown gas will make it difficult for the liquid solder to flow into the deep part of the gap, and it will cause the liquid solder to easily form air holes for gas to escape, resulting in incomplete sealing and easy leakage of the working coolant during subsequent work. In the present invention, the volume of the airtight space 202 will suddenly increase, thereby reducing the air pressure in the first water chamber 110 and the second water chamber 120, making it easier for the liquid solder to fill (be sucked into) the deep part of the gap and achieving complete sealing. In this way, after the solder solidifies, the effective connection area between the first water chamber 110 and the heat dissipation pipe 130, and between the second water chamber 120 and the heat dissipation pipe 130 is larger, which can achieve a more stable connection, and the solder is not prone to forming holes, so the working coolant will not leak during subsequent work. That is to say, the double-sided sealed soldering jig 200 of the present invention utilizes negative pressure to suck the liquid solder into the gap, enabling the solder to fill the deep part of the gap, thereby obtaining better sealing effect and stable connection effect.

[0055] It should be emphasized that the double-sided sealed soldering jig 200 forms negative pressure by changing the volume of the airtight space 202. This means that after the piston rod 220 is reset, the volume of the airtight space 202 will no longer change, and the internal and external air pressures of the first water chamber 110 and the second water chamber 120 will quickly return to balance. This feature is the key to the double-sided sealed soldering jig 200 achieving a good sealing effect. The design principle is as follows: Although using negative pressure can make the liquid solder quickly fill the deep part of the gap, if it is always in a negative pressure state, the solder will form holes for external gas to enter the first water chamber 110 and the second water chamber 120, which will instead damage the soldering seal. The double-sided sealed soldering jig 200 of the present invention only makes the first water chamber 110 and the second water chamber 120 form a negative pressure for a short period of time, which can not only prompt the liquid solder to quickly fill the deep part of the gap, but also prevent excessive force from damaging the seal.

[0056] In addition, the use of the double-sided sealed soldering jig 200 of the present invention does not require changing the original structure of the water-cooled row 100. It makes full use of the connection relationship between the main structures of the water-cooled row 100. Only by installing the double-sided sealed soldering jig 200 at the first water chamber 110 can it assist in the soldering process.

[0057] Furthermore, in order to make the liquid solder easier to fill into the gap, the solder welding sheet 250 is specially designed. Specifically, in the solder welding sheet 250, a flanging 252 is formed at the edge of the waist-shaped through hole 251 (as Figure 8 shown). The flanging 252 can be formed when the waist-shaped through hole 251 is stamped on the solder welding sheet 250.

[0058] During assembly, taking the first water chamber 110 as an example, the solder welding sheet 250 is sleeved on the ends of a plurality of heat dissipation tubes 130 through the waist-shaped through holes 251, and the flanging 252 faces the first water chamber 110. When the first water chamber 110 is pressed against the fixed frame 140, the flanging 252 will be clamped at the gap between the first water chamber 110 and the heat dissipation tube 130. At this time, the flanging 252 can play a role in stable connection, thereby preventing the heat dissipation tube 130 and the first water chamber 110 from shaking and separating. When passing through the high-temperature furnace, the solder welding sheet 250 melts, and the molten liquid solder of the flanging 252 will flow into the gap. At this time, the flanging 252 plays a role in quickly filling the gap.

[0059] Preferably, in order to reduce the friction force when the piston rod 220 slides and avoid jamming, a sealing ring (not shown in the figure) is provided on the piston head 221. The sealing ring fits on the inner wall of the air extraction sleeve 211, and grease is applied on the inner wall of the air extraction sleeve 211. In this way, the sealing ring can better fill the gap between the piston head 221 and the air extraction sleeve 211, providing good sealing conditions for the airtight space 202; at the same time, the soft sealing ring can also prevent the piston head 221 from wearing against the air extraction sleeve 211. The grease can further reduce the sliding friction coefficient of the sealing ring, thereby realizing the smooth sliding of the piston rod 220.

[0060] In another embodiment, the elastic arm 231 of the clamping member 230 does not adopt a shape memory metal structure, but is composed of two metals with different coefficients of thermal expansion (similar to the temperature-sensitive metal sheet applied in the field of hot water kettles in the prior art). At normal temperature, the elastic arm 231 is in an outward-turning state; when the temperature rises, the metal on the inner side of the elastic arm 231 has a small degree of thermal expansion, and the metal on the outer side has a large degree of thermal expansion, so that the elastic arm 231 will contract inward. In this way, the elastic arm 231 can still achieve the effect of "clamping with the clamping through groove 201 before brazing and separating from the clamping through groove 201 when the temperature reaches the standard", thereby playing the same role as the shape memory metal structure. Of course, the elastic arm 231 of the clamping member 230 can also adopt other structures as long as it can achieve the action of self-contracting when the temperature reaches the standard.

[0061] The present invention also provides a brazing process for the water-cooled row 100, which is realized based on the above-mentioned double-sided sealing brazing jig 200, and includes the following steps:

[0062] Step 1, obtain the solder welding sheet 250, and sleeve the solder welding sheet 250 on both ends of the heat dissipation tube 130, so that the solder welding sheet 250 is located between the fixed frame 140 and the first water chamber 110, and between the fixed frame 140 and the second water chamber 120;

[0063] Step 2: Install the base 210 onto the first water chamber 110. The air extraction sleeve 211 is fitted with the water inlet interface 113, the positioning sleeve 212 is fitted with the water outlet interface 114, and the sealing plug 213 seals the positioning sleeve 212.

[0064] Step 3: Press down the piston rod 220. The reset elastic member 240 is compressed, and the elastic arm 231 of the clamping member 230 is clamped with the clamping through groove 201, so that the piston rod 220 remains in the current position.

[0065] Step 4: The double-sided seal brazing jig 200 and the water cooling row 100 pass through the high-temperature furnace together. During this period, when the ambient temperature rises to the specified temperature, the solder welding sheet 250 melts, the elastic arm 231 of the clamping member 230 shrinks due to the temperature effect, and the reset elastic member 240 bounces up the piston rod 220, causing the internal air pressure of the first water chamber 110 and the second water chamber 120 to suddenly decrease, and then sucking the liquid solder into the gap. In this way, after leaving the high-temperature furnace, the solder solidifies, and the solder filling the deep part of the gap can provide a better sealing effect and stable connection effect, thus avoiding the leakage of the working coolant during the subsequent working process.

[0066] In summary, the double-sided seal brazing jig 200 for the water cooling row and its brazing process of the present invention enable the solder to be filled into the part gap more efficiently during brazing, thereby ensuring the filling integrity, avoiding the generation of holes after welding, and avoiding the leakage of the subsequent working coolant.

[0067] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A double-sided sealed brazing fixture for a water-cooled radiator, which provides welding assistance for a water-cooled radiator passing through a high-temperature furnace during the brazing process, the water-cooled radiator comprising: A first water chamber, a second water chamber, a plurality of heat dissipation pipes and a fixed frame, wherein the heat dissipation pipe is connected to the first water chamber and the second water chamber, the interior of the first water chamber is divided into a water inlet chamber and a water outlet chamber, the water inlet chamber and the water outlet chamber are separated by a partition plate, and the fixed frame is sleeved on both ends of the plurality of heat dissipation pipes; The invention is characterized in that it comprises: a base, a piston rod, a clamping piece, a resetting elastic piece and a soldering sheet, the base is a hollow structure, a vacuum sleeve and a positioning sleeve are arranged on the base, the piston rod is slidably arranged in the vacuum sleeve, the clamping piece is sleeved on the piston rod, and the resetting elastic piece provides elastic force for the piston rod; a clamping through groove is provided on the vacuum sleeve, an elastic arm is provided on the clamping piece, and the elastic arm of the clamping piece will deform with temperature change, so that the elastic arm is clamped or separated from the clamping through groove; the soldering sheet is arranged between the fixed frame and the first water chamber, and between the fixed frame and the second water chamber; The first water chamber is provided with a water inlet interface corresponding to the water inlet cavity and a water outlet interface corresponding to the water outlet cavity, the vacuum sleeve is sleeved on the water inlet interface, the positioning sleeve is sleeved on the water outlet interface, and a detachable sealing plug is provided on the positioning sleeve.

2. The double-sided sealing brazing fixture for a water cooling radiator according to claim 1, characterized in that: A piston head is provided at the end of the piston rod. When the piston rod is pressed down, a relatively sealed air-tight space is formed between the piston head and the water inlet interface in the air extraction sleeve.

3. The double-sided sealing brazing fixture for a water cooling radiator according to claim 2, characterized in that: The resetting elastic member is a spring structure, and two ends of the resetting elastic member are respectively supported on the piston head and the water inlet interface.

4. The double-sided sealing brazing fixture for a water cooling radiator according to claim 2, characterized in that: The piston head is provided with a sealing ring, the sealing ring is attached to the inner wall of the air extraction sleeve, and the inner wall of the air extraction sleeve is coated with grease.

5. The double-sided sealing brazing fixture for a water cooling radiator according to claim 1, characterized in that: The solder welding sheet is provided with waist-shaped through holes corresponding to the heat dissipation tubes, and the solder welding sheet is sleeved on the ends of the plurality of heat dissipation tubes through the waist-shaped through holes.

6. The double-sided sealing brazing fixture for a water cooling radiator according to claim 5, characterized in that: A warped edge is formed at the edge of the waist-shaped through hole.

7. The double-sided sealing brazing fixture for a water cooling radiator according to claim 1, characterized in that: The clamping member is a memory metal structure. Under normal temperature, the elastic arm of the clamping member has a tendency to turn outward; when the temperature meets the requirement, the elastic arm of the clamping member will shrink inward.

8. The double-sided sealing brazing fixture for a water cooling radiator according to claim 1, characterized in that: The elastic arm of the clamping member is made of two metals, and the thermal expansion coefficients of the two metals are different; at room temperature, the elastic arm will turn outward; when the temperature rises, the elastic arm will shrink inward.

9. A brazing process for a water cooling radiator, characterized in that: The double-sided sealed brazing jig according to any one of claims 1 to 8 is implemented, comprising the following steps: Step 1, obtaining the solder welding sheet, and sleeve the solder welding sheet onto both ends of the heat dissipation pipe, so that the solder welding sheet is located between the fixed frame and the first water chamber, and between the fixed frame and the second water chamber; Step 2, installing the base on the first water chamber; Step 3, pressing the piston rod downward to compress the resetting elastic member, so that the elastic arm of the clamping member is clamped with the through groove; Step 4: The double-sided sealed brazing fixture and the water-cooling radiator pass through a high-temperature furnace. During this period, the brazing material welding sheet melts, the elastic arm of the clamping part shrinks due to the temperature, and the reset elastic part bounces the piston rod, causing the internal air pressure of the first water chamber and the second water chamber to suddenly drop, thereby sucking the liquid brazing material into the gap.

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