Double-sealed brazing jig for water-cooled row and brazing process of double-sealed brazing jig

Abstract

The invention provides a double-face sealing brazing jig for a water-cooled row and a brazing process of the double-face sealing brazing jig, the double-face sealing brazing jig provides welding assistance for the water-cooled row in the brazing process, and the double-face sealing brazing jig comprises a base, a piston rod, a clamping piece, a reset elastic piece and a brazing filler metal welding piece. The base is of a hollow structure, an air exhaust sleeve and a positioning sleeve are arranged on the base, the piston rod is arranged in the air exhaust sleeve in a sliding mode, the clamping piece is arranged on the piston rod in a sleeving mode, and the reset elastic piece provides elastic force for the piston rod. A clamping through groove is formed in the air exhaust sleeve, an elastic arm is arranged on the clamping piece, and the elastic arm of the clamping piece can deform along with temperature change, so that the elastic arm is clamped in or separated from the clamping through groove. The brazing process is realized on the basis of the double-sided sealing brazing jig. According to the double-face sealing brazing jig and the brazing process, gaps of parts can be more efficiently filled with brazing filler metal, so that filling completeness is guaranteed, holes are prevented from being generated after welding, and the subsequent leakage phenomenon is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of water cooling radiators, and in particular to a double-sided sealing brazing fixture for a water cooling radiator and a brazing process thereof. Background Art

[0002] With the development and progress of science and technology, computers have gradually become an indispensable necessity in people's daily lives. When electronic devices are operating, 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 devices, the electronic devices may be damaged due to the increasing temperature. In order to improve the heat dissipation efficiency of electronic devices, heat dissipation devices are generally used to quickly remove the heat generated by function expansion cards.

[0003] The water cooling system is a common heat dissipation device, and the water cooling system includes a water cooling radiator (water radiator) which plays a major role in heat dissipation. The main structure of the water cooling radiator 100 is as follows: Figure 1 As shown, it includes: a first water chamber 110, a second water chamber 120 and a heat dissipation pipe 130. The heat dissipation pipe 130 connects the first water chamber 110 and the second water chamber 120. The interior of the first water chamber 110 is divided into a water inlet chamber and a water outlet chamber. When in use, under the action of pressure, the working coolant flows from the water inlet chamber through part of the heat dissipation pipe 130 to the second water chamber 120, and then from the second water chamber 120 through the remaining heat dissipation pipes 130 back to the water outlet chamber of the first water chamber 110. During the period of passing through the heat dissipation pipe 130, the working coolant will dissipate heat into the air, thereby achieving cooling.

[0004] In order to realize the circulation of the coolant, the heat dissipation pipe 130 and the first water chamber 110 and the second water chamber 120 need to be well sealed to prevent leakage of the working coolant. The current sealing method is to weld the heat dissipation pipe 130 to the first water chamber 110 and the second water chamber 120. There are two welding methods that can be used: friction welding and brazing. However, both welding methods have defects: for example, friction welding can easily cause the heat dissipation pipe 130 to bend and deform, and it is also easy to destroy the flatness of the contact surface of the first water chamber 110 and the second water chamber 120; and during traditional brazing, the brazing material is prone to holes, resulting in incomplete sealing and leakage of the working coolant.

[0005] To this end, how to develop a double-sided sealed brazing fixture for a water cooling radiator and its brazing process, so that the brazing material can be more efficiently filled into the gap between parts during brazing to ensure the filling integrity, thereby avoiding the formation of holes after welding and preventing the working coolant from leaking, is a technical problem that technical personnel in this field need to solve. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a double-sided sealed brazing fixture for a water cooling radiator and a brazing process thereof, which can enable the brazing material to be more efficiently filled into the gap between parts during brazing, ensure the filling integrity, thereby avoiding the generation of holes after welding and preventing the working coolant from leaking.

[0007] The objective of the present invention is achieved through the following technical solutions:

[0008] A double-sided sealed brazing jig for a water-cooled radiator, which provides welding assistance for a water-cooled radiator passing through a high-temperature furnace during brazing. The water-cooled radiator comprises: a first water chamber, a second water chamber, a plurality of heat dissipation pipes and a fixed frame. The heat dissipation pipes are 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. The fixed frame is sleeved on both ends of the plurality of heat dissipation pipes.

[0009] The double-sided sealing brazing fixture comprises: a base, a piston rod, a clamping piece, a reset elastic piece and a brazing sheet, wherein 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 reset elastic piece provides elastic force for the piston rod;

[0010] The vacuum sleeve is provided with a clamping groove, and the clamping member is provided with an elastic arm, and the elastic arm of the clamping member will deform with temperature changes, so that the elastic arm is clamped or separated from the clamping groove;

[0011] The solder welding sheet is arranged between the fixing frame and the first water chamber, and between the fixing frame and the second water chamber.

[0012] In one embodiment, 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 removable sealing plug is provided on the positioning sleeve.

[0013] In one of the embodiments, a piston head is provided at the end of the piston rod. When the piston rod is pressed downward, the piston head and the water inlet interface form a relatively sealed air-tight space in the vacuum sleeve.

[0014] In one embodiment, the resetting elastic member is a spring structure, and two ends of the resetting elastic member are respectively abutted against the piston head and the water inlet interface.

[0015] In one of the embodiments, a sealing ring is provided on the piston head, the sealing ring is attached to the inner wall of the vacuum sleeve, and grease is applied on the inner wall of the vacuum sleeve.

[0016] In one of the embodiments, 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.

[0017] In one of the embodiments, a warped edge is formed at the edge of the waist-shaped through hole.

[0018] In one of the embodiments, the clamping member is a memory metal structure, and at room 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.

[0019] In one of the embodiments, 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 be turned outward; when the temperature rises, the elastic arm will shrink inward.

[0020] A brazing process for a water cooling radiator is implemented based on the above-mentioned double-sided sealed brazing fixture, comprising the following steps:

[0021] 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;

[0022] Step 2, installing the base on the first water chamber;

[0023] 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;

[0024] 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.

[0025] In summary, the double-sided sealed brazing fixture for the water cooling radiator and the brazing process thereof of the present invention can more efficiently fill the brazing material into the gap between parts during brazing, thereby ensuring the filling integrity, avoiding the generation of holes after welding, and avoiding leakage of the coolant in subsequent work. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic diagram of the structure of the water cooling row involved in the present invention;

[0028] Figure 2 for Figure 1 A partial exploded schematic diagram of a water cooling radiator is shown;

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

[0030] Figure 4 for Figure 3 The schematic diagram of the structural decomposition of the double-sided sealing brazing fixture shown;

[0031] Figure 5 for Figure 2 The structural schematic diagram of the first water chamber and the solder welding sheet shown;

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

[0033] Figure 7 It is a schematic diagram of the matching state of 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 DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given 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 thoroughly understood.

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

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

[0038] The present invention provides a double-sided sealed brazing fixture 200 for a water-cooling radiator, which provides welding assistance for the water-cooling radiator 100 passing through a high-temperature furnace during the brazing process, so that the brazing material can be more efficiently filled into the gap between parts to ensure the filling integrity, thereby avoiding the generation of holes after welding and preventing the working coolant from leaking during subsequent work.

[0039] The structure of the water cooling row 100 of the present invention is as follows Figure 1 As shown, it includes: a first water chamber 110, a second water chamber 120, a plurality of heat dissipation pipes 130 and a fixed frame 140. The heat dissipation pipe 130 connects the first water chamber 110 and the second water chamber 120. The interior of the first water chamber 110 is divided into a water inlet chamber 111 and a water outlet chamber 112. The water inlet chamber 111 and the water outlet chamber 112 are separated by a partition plate 113. The fixed frame 140 is sleeved on both ends of the plurality of heat dissipation pipes 130.

[0040] like Figure 3 and Figure 4 As shown, the double-sided sealing brazing fixture 200 of the present invention comprises: a base 210, a piston rod 220, a clamping member 230, a reset elastic member 240 and a brazing material welding sheet 250 (such as Figure 2 and Figure 5 The base 210 is a hollow structure, and is provided with a vacuum sleeve 211 and a positioning sleeve 212. The piston rod 220 is slidably disposed in the vacuum sleeve 211. The clamping member 230 is sleeved on the piston rod 220. The resetting elastic member 240 provides elastic force for the piston rod 220.

[0041] Among them, Figure 4 As shown, a clamping slot 201 is provided on the exhaust sleeve 211 , and an elastic arm 231 is provided on the clamping member 230 . The elastic arm 231 of the clamping member 230 will deform with temperature changes, so that the elastic arm 231 is clamped or separated from the clamping slot 201 .

[0042] Preferably, the clamping member 230 is a memory metal structure. Under normal temperature, the elastic arm 231 of the clamping member 230 has a tendency to turn outward, so when the elastic arm 231 slides to the position of the clamping slot 201, the end of the elastic arm 231 will be clamped at the clamping slot 201, thereby keeping the piston rod 220 in a downwardly pressed state. When the temperature meets the requirements, the elastic arm 231 of the clamping member 230 will shrink inward, thereby separating from the clamping slot 201, so that the piston rod 220 has the conditions for rising and resetting.

[0043] Moreover, the solder welding sheet 250 is disposed between the fixing frame 140 and the first water chamber 110, and between the fixing frame 140 and the second water chamber 120 (eg, Figure 2 As shown). When passing through the high temperature furnace (when the ambient temperature rises to a specified temperature), the solder welding sheet 250 will melt into liquid solder, and then fill the gap between the first water chamber 110 and the heat dissipation pipe 130, the gap between the second water chamber 120 and the heat dissipation pipe 130, and solidify after cooling to achieve sealing. Preferably, the solder welding sheet 250 is provided with a waist-shaped through hole 251 corresponding to the heat dissipation pipe 130, and the solder welding sheet 250 is sleeved on the ends of the plurality of heat dissipation pipes 130 through the waist-shaped through hole 251.

[0044] Water cooling radiator 100, such as Figure 2 and Figure 5 As shown, the first water chamber 110 is provided with a water inlet interface 113 corresponding to the water inlet chamber 111 and a water outlet interface 114 corresponding to the water outlet chamber 112. Figure 6 As shown, when the double-sided sealing brazing fixture 200 is installed on the water cooling radiator 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 a detachable sealing plug 213 is provided on the positioning sleeve 212. Of course, this matching method is not a fixed match, 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 (such as Figure 4 As shown in FIG. 2 ), when the piston rod 220 is pressed down, the piston head 221 in the air extraction sleeve 211 and the water inlet interface 113 form a relatively sealed airtight space 202 (as shown in FIG. 2 ). Figure 6 During the brazing process, the volume of the air-confined space 202 will change under certain conditions, thereby reducing the air pressure in the first water chamber 110, so that the brazing material welding sheet 250 is adsorbed and attached to the first water chamber 110 under the negative pressure, so that the molten brazing material can be filled more efficiently. The specific working principle will be described below.

[0046] Preferably, Figure 4 and Figure 6 As shown, the resetting elastic member 240 is a spring structure, and the two ends of the resetting elastic member 240 are respectively held against the piston head 221 and the water inlet interface 113. When the piston rod 220 is pressed down, the resetting elastic member 240 is compressed and accumulates elastic potential energy.

[0047] In combination with the above structure, the working principle of the double-sided sealed brazing fixture 200 of the present invention is described below:

[0048] Before brazing, the water cooling radiator 100 must be preliminarily assembled. It is worth noting that the partition plate 113 is only preliminarily plugged into the first water chamber 110, and it is not welded and sealed with the first water chamber 110, so the water inlet chamber 111 and the water outlet chamber 112 are not completely isolated (the two are still connected as a whole). First, the staff puts the fixed frame 140 on the multiple heat dissipation tubes 130, and then puts the solder welding sheet 250 on the end of the heat dissipation tube 130, and then plugs the first water chamber 110 and the second water chamber 120 into the two ends of the heat dissipation tube 130 respectively. In this way, the solder welding sheet 250 is between the first water chamber 110 and the fixed frame 140, and between the second water chamber 120 and the fixed frame 140;

[0049] Then, if Figure 6 As 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 sealed on the positioning sleeve 212. Then, as shown in FIG. Figure 7 As shown, the staff member presses down the piston rod 220 so that the end of the elastic arm 231 of the clamping member 230 is clamped on the clamping groove 201, the piston rod 220 remains in the current state, and the reset elastic member 240 is compressed. At this time, in the vacuum sleeve 211, an air-enclosed space 202 is formed between the piston head 221 of the piston rod 220 and the water inlet interface 113, and the volume of the space is relatively small at this time. After the double-sided sealing brazing fixture 200 is installed in this way, the interior of the first water chamber 110, the interior of the second water chamber 120, and the heat dissipation pipe 130 constitute a relatively closed space;

[0050] During brazing, the water cooling radiator 100 and the double-sided sealed brazing fixture 200 pass through a high-temperature furnace. When the ambient temperature rises to a specified temperature, the brazing sheet 250 will melt, and the molten (liquid) brazing material will have a capillary flow effect, that is, the liquid brazing material will fill the brazing seam along the gap, so that the liquid brazing material will fill the gap between the first water chamber 110 and the heat dissipation pipe 130, and the gap between the second water chamber 120 and the heat dissipation pipe 130;

[0051] At the same time, when the ambient temperature reaches the specified temperature, the elastic arm 231 of the clamping member 230 will shrink inward, and the elastic arm 231 will separate from the clamping groove 201. At this time, the piston rod 220 will move upward (bounce up) quickly under the action of the reset elastic member 240. The volume of the air-confined space 202 will suddenly increase, thereby generating negative pressure, which reduces the internal air pressure of the water-cooling radiator 100. In this way, the internal air pressure of the first water chamber 110 and the second water chamber 120 suddenly decreases, and the external gas will be replenished into the first water chamber 110 and the second water chamber 120 from the gap between the parts. In this process, the liquid solder will be sucked in under the action of the air pressure, thereby further filling the gap between the first water chamber 110 and the heat dissipation pipe 130, and the gap between the second water chamber 120 and the heat dissipation pipe 130. In this way, after leaving the high-temperature furnace, the solder solidifies, and the solder filled into the deep gap can provide better sealing effect and stable connection effect, thereby avoiding leakage of the working coolant during subsequent work;

[0052] After the brazing is completed, the base 210 is removed, and the partition plate 113 is completely inserted into the first water chamber 110, and the partition plate 113 and the first water chamber 110 are welded and sealed to separate the first water chamber 110 into two independent closed spaces, the water inlet chamber 111 and the water outlet chamber 112. In addition, the brazing material also exists 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] At this point, the basic assembly of the water cooling radiator 100 has been completed. When testing the air tightness later, the staff can remove the sealing plug 213, then connect the negative pressure vacuum pump to the positioning sleeve 212, and perform the air extraction operation on the water cooling radiator 100. If a good vacuum degree can be achieved, it means that there is no leakage in the water cooling radiator 100, that is, the sealing welding is achieved. 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 a high-temperature furnace, the temperature rise will cause the air pressure in the first water chamber 110 and the second water chamber 120 to rise slightly. The gas therein will be blown out to the outside through the gaps between the parts. In this process, the blown gas will make it difficult for the liquid solder to flow into the deep gaps, and cause the liquid solder to easily form holes for gas outlet, thereby causing incomplete sealing, and the working coolant is prone to leakage during subsequent work. In the present invention, the volume of the air-tight 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 (inhale) into the deep gaps, and achieving complete sealing. In this way, after the solder solidifies, the effective connection area between the first water chamber 110 and the heat pipe 130, and the effective connection area between the second water chamber 120 and the heat pipe 130 is larger, which can achieve a more stable connection, and the solder is not prone to holes, and the working coolant will not leak during subsequent work. That is, the double-sided sealed brazing jig 200 of the present invention utilizes negative pressure to draw liquid brazing material into the gap, so that the brazing material can be filled deep into the gap, thereby achieving a better sealing effect and a stable connection effect.

[0055] It should be emphasized that the double-sided sealed brazing jig 200 forms negative pressure by changing the volume of the air-tight space 202, which means that after the piston rod 220 is reset, the volume of the air-tight 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 soon return to balance. This feature is the key to the double-sided sealed brazing jig 200 to achieve a good sealing effect. The design principle is as follows: although the use of negative pressure can make the liquid brazing material quickly fill into the depth of the gap, if it is always in a negative pressure state, the brazing material will form holes so that the external gas can enter the first water chamber 110 and the second water chamber 120, which will destroy the brazing sealing. The double-sided sealed brazing jig 200 of the present invention only forms a negative pressure in the first water chamber 110 and the second water chamber 120 for a short period of time, which can not only prompt the liquid brazing material to quickly fill into the depth of the gap, but also avoid excessive force to destroy the sealing.

[0056] In addition, the use of the double-sided sealed brazing fixture 200 of the present invention does not require changing the original structure of the water-cooling radiator 100. It fully utilizes the connection relationship between the main structures of the water-cooling radiator 100. The double-sided sealed brazing fixture 200 only needs to be installed in the first water chamber 110 to assist the brazing process.

[0057] Furthermore, in order to make it easier for the liquid solder to fill the gap, the solder welding sheet 250 is also specially designed. Specifically, in the solder welding sheet 250, a warped edge 252 (such as Figure 8 The warped edge 252 may be formed when the waist-shaped through hole 251 is punched out of 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 the plurality of heat dissipation tubes 130 through the waist-shaped through hole 251, and the warping edge 252 faces the first water chamber 110. When the first water chamber 110 and the fixed frame 140 are pressed tightly, the warping edge 252 will be stuck in the gap between the first water chamber 110 and the heat dissipation tube 130. At this time, the warping edge 252 can play a role in stabilizing the connection, thereby preventing the heat dissipation tube 130 and the first water chamber 110 from shaking and detaching. When passing through the high-temperature furnace, the solder welding sheet 250 melts, and the liquid solder after the warping edge 252 melts will flow into the gap. At this time, the warping edge 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) is provided on the piston head 221, and the sealing ring is attached to the inner wall of the suction sleeve 211, and grease is applied to the inner wall of the suction sleeve 211. In this way, the sealing ring can better fill the gap between the piston head 221 and the suction sleeve 211, and provide good sealing conditions for the air-tight space 202; at the same time, the soft sealing ring can also avoid wear of the piston head 221 and the suction sleeve 211. Grease can further reduce the sliding friction coefficient of the sealing ring, thereby achieving smooth sliding of the piston rod 220.

[0060] In another embodiment, the elastic arm 231 of the clamping member 230 does not adopt a memory metal structure, but is composed of two metals with different thermal expansion coefficients (similar to the temperature-sensitive metal sheet used in the field of hot water bottles in the prior art). Under normal temperature conditions, the elastic arm 231 is in an everted state; when the temperature rises, the metal on the inside of the elastic arm 231 has a small degree of thermal expansion, and the metal on the outside has a large degree of thermal expansion, so that the elastic arm 231 will shrink inward. In this way, the elastic arm 231 can still achieve the effect of "clamping with the clamping groove 201 before brazing, and separating from the clamping groove 201 when the temperature reaches the standard", thereby playing the same role as the 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 autonomous contraction when the temperature reaches the standard.

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

[0062] Step 1: Obtain the soldering sheet 250, and sleeve the soldering sheet 250 onto both ends of the heat dissipation pipe 130, so that the soldering 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 on the first water chamber 110, the air extraction sleeve 211 cooperates with the water inlet interface 113, the positioning sleeve 212 cooperates with the water outlet interface 114, and the sealing plug 213 is sealed on the positioning sleeve 212;

[0064] Step 3: Press the piston rod 220 downward, the resetting elastic member 240 is compressed, and the elastic arm 231 of the clamping member 230 is clamped with the clamping slot 201, so that the piston rod 220 remains in the current position;

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

[0066] In summary, the double-sided sealed brazing fixture 200 for the water cooling radiator and the brazing process thereof of the present invention enable the brazing material to be more efficiently filled into the gaps between parts during brazing, thereby ensuring the filling integrity, avoiding the formation of holes after welding, and avoiding leakage of the coolant in subsequent work.

[0067] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached 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 solder welding 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; The vacuum sleeve is provided with a clamping groove, and the clamping member is provided with an elastic arm, and the elastic arm of the clamping member will deform with temperature changes, so that the elastic arm is clamped or separated from the clamping groove; The solder welding sheet is arranged between the fixing frame and the first water chamber, and between the fixing frame and the second water chamber.

2. The double-sided sealing brazing fixture for a water cooling radiator according to claim 1, characterized in that: 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.

3. The double-sided sealing brazing fixture for a water cooling radiator according to claim 2, 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.

4. The double-sided sealing brazing fixture for a water cooling radiator according to claim 3, 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.

5. The double-sided sealing brazing fixture for a water cooling radiator according to claim 3, 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.

6. 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.

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

8. 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.

9. 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.

10. A brazing process for a water cooling radiator, characterized in that: The double-sided sealed brazing jig according to claims 1 to 9 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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