Cold plate brazing device and brazing method

Abstract

The invention discloses a cold plate brazing device and a brazing method, and relates to the technical field of cold plate brazing. The quick-release pressing device is composed of a cross beam and a quick-release connecting plate, and the quick-release connecting plate can be horizontally rotated to achieve quick mounting and dismounting. And a self-adaptive pressing device is arranged in the pressing plate at the bottom of the cross beam, so that the cold plate can be uniformly pressed. The force transmission assembly comprises a ceramic pressing block, a three-dimensional structure is formed, and uniform pressure distribution is ensured. The brazing process comprises the steps of adjusting the stand columns, fixing the cold plate, tightening the quick-release pressing device and feeding the quick-release pressing device into a brazing furnace. The cold plate can be rapidly pressed, the operation efficiency is greatly improved, and various process requirements are met; when the cold plates of the same specification are continuously brazed, the positions of the adjusting nuts do not need to be frequently adjusted, the cold plates can be quickly pressed only by rotating the quick-release connecting plates to enable the clamping hooks to be clamped with the stand columns, and the brazing operation continuity and the overall efficiency are further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold plate brazing, in particular to a cold plate brazing device and a brazing method. BACKGROUND

[0002] With the rapid development of data centers, 5G communications, new energy vehicles, power electronics and other industries, the heat dissipation demand of high-power density devices is growing explosively. Cold plates have become the mainstream heat dissipation solution for core components such as high-power IGBTs, CPUs / GPUs, lasers and power battery packs due to their excellent heat conduction performance, compact structure and customizable flow channel design. The reliability of the cold plate directly determines the service life and safety of the entire system, and the brazing quality is a key link of the reliability of the cold plate - any virtual welding, micro-cracks or residual stress concentration may cause cooling fluid leakage, increased thermal resistance or even failure of the entire machine.

[0003] There are currently three technical routes for cold plate brazing in the industry: vacuum brazing, which has high vacuum degree and good weld formation, but requires high investment in equipment, high energy consumption, long cycle time and is difficult to be compatible with large-size or locally reinforced heat dissipation structures. Controlled atmosphere brazing (CAB): reduces oxidation through nitrogen protection, but requires high consistency in clamping force of the fixture; once the clamping is uneven, it is easy to cause flow channel deformation, fin collapse and other problems. Manual flame or induction brazing: high flexibility, but human factors are large, batch consistency is difficult to guarantee, and labor intensity is high and the environment is poor.

[0004] In the above processes, the role of the fixture is particularly critical. The existing fixtures are mainly composed of a base plate, a vertical column, a cross beam and multiple sets of bolts, and have the following common problems:

[0005] (1) Poor universality: the position of the vertical column is fixed or the adjustment range is limited, and when facing cold plates of different lengths, widths or thicknesses, special base plates often need to be redesigned or processed, resulting in "one plate one fixture", which greatly increases the mold cost and changeover time.

[0006] (2) Low precision of clamping force adjustment: the traditional bolt-plate structure needs to be tightened point by point with a torque wrench, which is tedious and prone to stress concentration; when disassembled, it also needs to be loosened point by point, which is low in efficiency.

[0007] (3) Insufficient compensation for thermal deformation: the brazing temperature is usually 580-620°C, the thermal expansion coefficient of aluminum alloy is large, and excessive rigidity of the fixture will limit the free expansion of the cold plate, and new residual stress will be generated during cooling after brazing, affecting the flatness and weld strength.

[0008] (4) High maintenance cost: the bolts and nuts are prone to sintering and seizure after repeated high-temperature cycles, and need to be replaced frequently, increasing downtime.

[0009] In summary, developing a cold plate brazing device that combines "universal positioning, rapid clamping, precise pressing, and low residual stress" has become a common technical bottleneck that the industry urgently needs to overcome. Summary of the Invention

[0010] To overcome the shortcomings of the prior art, the present invention discloses a cold plate brazing device and a brazing method.

[0011] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0012] A cold-rolled steel plate brazing apparatus and brazing method, comprising:

[0013] The base has multiple connecting holes spaced apart on both sides; the base is used to support the cold plate.

[0014] Four uprights are located at the four corners of the cold plate; the bottom of each upright is threadedly connected to the corresponding connecting hole of the base.

[0015] A quick-release clamping device is located above the cold plate and is quickly connected to four columns by horizontal rotation; it is used to clamp the cold plate.

[0016] Four adjusting nuts are installed on the top of the four columns respectively; used to adjust the clamping force of the quick-release clamping device.

[0017] Preferably, the quick-release clamping device includes:

[0018] beam;

[0019] There are two quick-release connecting plates, which are respectively located at the top of both ends of the crossbeam. The middle part of the quick-release connecting plate is rotatably connected to the crossbeam. Both ends of the quick-release connecting plate are equipped with hooks that can be matched with the corresponding columns. By rotating the quick-release connecting plate horizontally, the hooks at both ends of the quick-release connecting plate can be engaged or disengaged from the corresponding columns to achieve quick release.

[0020] Preferably, the bottom of the crossbeam is provided with a plurality of clamping plates spaced apart along the length direction, and the middle position of the clamping plate is hinged to the crossbeam; a handle is installed on the quick-release connecting plate.

[0021] Preferably, the clamping plate has U-shaped grooves at both ends, and an adaptive clamping device is installed in the U-shaped grooves; the adaptive clamping device includes:

[0022] The threaded sleeve is hinged to the corresponding groove walls of the U-shaped groove of the clamping plate on both sides;

[0023] The adjusting sleeve is threadedly connected to the inner hole of the threaded sleeve, and the length of the adjusting sleeve is greater than the length of the threaded sleeve.

[0024] The clamping column is movably inserted into the adjusting sleeve;

[0025] A clamping plate is located at the bottom of the clamping column;

[0026] The compression spring is movably sleeved on the column body between the corresponding adjusting sleeve and the compression plate of the compression column.

[0027] Preferably, the adjusting sleeve has wing plates on both sides of its top.

[0028] Preferably, a retaining spring is installed on the top of the clamping column.

[0029] Preferably, a force transmission component is provided between the bottom of the crossbeam and the cold plate; the force transmission component includes:

[0030] The ceramic pressing blocks are arranged at intervals along the length of the crossbeam. The tops of the ceramic pressing blocks are flush with each other, and the bottoms are adapted to the corresponding positions of the cold plate. Both ends of the ceramic pressing blocks are provided with vertical strip grooves.

[0031] Two connecting rods are respectively inserted into the strip grooves at both ends of the ceramic pressing block; used to assemble multiple ceramic pressing blocks into a single structure;

[0032] An isolation ring is fitted onto the rod body between two adjacent ceramic pressure blocks of the connecting rod.

[0033] There are four limit nuts, which are installed at both ends of the two connecting rods respectively.

[0034] Preferably, a limiting spring is fitted on the rod body between the limiting nut and the ceramic pressure block of the connecting rod.

[0035] Preferably, the ceramic block is made of silicon nitride ceramic, and the top and sides of the ceramic block are provided with elongated through holes.

[0036] A brazing method using a cold plate brazing apparatus includes the following steps:

[0037] S1. Adjust the position of the four columns according to the length of the cold plate, and install adjusting nuts on the top of the four columns;

[0038] S2. Place the cold plate on the base and position it between the four columns;

[0039] S3. Place the quick-release clamping device on the cold plate, and rotate the quick-release connecting plate to make the hooks at both ends of the quick-release connecting plate engage with the corresponding columns.

[0040] S4. Tighten the adjusting nut so that the adjusting nut presses against the quick-release connecting plate, the quick-release connecting plate presses against the crossbeam, and the crossbeam presses against the cold plate.

[0041] S5. Send the cold plate into the brazing furnace for brazing. After brazing, rotate the quick-release connecting plate in the opposite direction to remove the quick-release clamping device.

[0042] By employing the technical solution described above, the present invention has the following beneficial effects:

[0043] (1) The quick-release clamping device of the present invention consists of a crossbeam and a quick-release connecting plate. The crossbeam is parallel to the axis of the cold plate along its length to ensure uniform distribution of clamping force. The quick-release connecting plate is rotatably connected to the crossbeam in the middle, and the hooks at both ends are matched with the column. The quick-release connecting plate can be rotated horizontally to quickly engage or disengage the hooks from the column, realizing quick installation and disassembly of the device and greatly improving the efficiency of brazing operations. The adjusting nut is installed on the top of the column. Tightening or loosening the adjusting nut can accurately adjust the clamping force of the quick-release clamping device on the cold plate to meet the requirements of different brazing processes. The chamfered structure of the opening end of the hook of the quick-release connecting plate means that when continuously brazing cold plates of the same specification, there is no need to frequently adjust the position of the adjusting nut. Only by rotating the quick-release connecting plate to engage the hooks with the column can the cold plate be quickly clamped, further improving the continuity and overall efficiency of brazing operations.

[0044] (2) The present invention further provides multiple clamping plates at the bottom of the crossbeam, which are hinged to the crossbeam and can flexibly rotate to fit the surface of the cold plate. The simultaneous action of multiple clamping plates increases the stress points of the cold plate, making the cold plate uniformly stressed, reducing the risk of deformation after brazing, and improving the brazing quality. An adaptive clamping device is installed in the U-shaped groove at both ends of the clamping plate, including a threaded sleeve, an adjusting sleeve, a clamping column, and other components. The threaded sleeve is hinged to the clamping plate and can deflect to maintain perpendicularity to the surface of the cold plate, providing stable mechanical support. Twisting the adjusting sleeve can adjust its relative position to the threaded sleeve, thereby controlling the compression of the clamping spring and precisely regulating the clamping spring. The clamping plate applies pressure to the cold plate, ensuring uniform stress and improving brazing quality. The adaptive clamping device also provides vertical floating space for components such as the clamping plate, facilitating quick disassembly and reassembly of the clamping device. This improves the smoothness and efficiency of the operation process and can cope with the thermal expansion of the cold plate during brazing. The two side wings on the top of the adjusting sleeve are easy for operators to tighten, simplifying the operation process without the need for additional tools. The retaining spring on the top of the clamping column prevents the clamping column from accidentally detaching from the adjusting sleeve, ensuring the structural stability and reliability of the adaptive clamping device and avoiding interference with the normal brazing operation.

[0045] (3) The present invention further provides a force transmission component between the bottom of the crossbeam and the cold plate, including a ceramic block and a connecting rod. The ceramic block is made of silicon nitride material with high thermal conductivity. The long strip-shaped through hole design on the top and sides of the block body ensures thermal conductivity and reduces its own weight. The connecting rod is inserted through the vertical strip grooves at both ends of the ceramic block. It can be combined into an overall structure to maintain stability, while retaining a certain degree of independence and making full contact with the surface of the cold plate. It is convenient for quick assembly and disassembly. It can also flexibly replace some ceramic blocks according to the specifications of the cold plate, improve the versatility and adaptability of the device, and reduce costs. An isolation ring is sleeved on the connecting rod to ensure the independence of the ceramic block and avoid mutual interference. The thickness of the isolation ring is the same as the thickness of the cold plate fins, so that the ceramic block is accurately placed in the cavity between adjacent fins of the cold plate, improving assembly efficiency and accuracy. The connecting rod is threaded with a limit nut at both ends to prevent the connecting rod from accidentally detaching from the ceramic block, ensuring the structural integrity and reliability of the force transmission component. A limit spring is sleeved on the connecting rod to give the ceramic block the ability to float and adjust along the axial direction of the connecting rod, so that it can flexibly adapt to the gap between adjacent fins of the cold plate, further improving the ease and efficiency of assembly. Attached Figure Description

[0046] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0047] Figure 2 This is a schematic diagram of the structure of the present invention;

[0048] Figure 3 This is a side view of the present invention;

[0049] Figure 4 Top view of the invention;

[0050] Figure 5 This is a schematic diagram of the base structure;

[0051] Figure 6 A three-dimensional structural diagram of the quick-release clamping device;

[0052] Figure 7 This is a schematic diagram of the quick-release clamping device;

[0053] Figure 8 This is a three-dimensional structural diagram of the adaptive clamping device;

[0054] Figure 9 A three-dimensional structural diagram of the force transmission component;

[0055] Figure 10 This is a schematic diagram of the force transmission component.

[0056] In the diagram: 1. Base; 2. Column; 3. Quick-release clamping device; 3-1. Crossbeam; 3-2. Quick-release connecting plate; 3-3. Clamping plate; 3-4. Handle; 4. Adaptive clamping device; 4-1. Threaded sleeve; 4-2. Adjusting sleeve; 4-3. Clamping column; 4-4. Clamping disc; 4-5. Clamping spring; 4-6. Wing plate; 4-7. Snap ring; 5. Adjusting nut; 6. Force transmission assembly; 6-1. Ceramic pressure block; 6-2. Connecting rod; 6-3. Isolation ring; 6-4. Limit nut; 6-5. Limit spring. Detailed Implementation

[0057] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0058] In the description of this invention, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] Example 1:

[0061] Combined with appendix Figures 1-7 A cold-rolled steel plate brazing device and brazing method are disclosed, comprising a base 1, four columns 2, four adjusting nuts 5, and a quick-release clamping device 3. The base 1 serves as a basic support component, its main function being to provide a stable support platform for the cold-rolled steel plate. Multiple connecting holes are evenly spaced on both sides of the base 1. These connecting holes are used to install and fix the columns 2, and can adjust the installation position of the columns 2 to accommodate cold-rolled steel plates of different lengths, thereby achieving the versatility of the base 1 and the columns 2 and effectively reducing usage costs. Specifically, as shown in the attached... Figure 5As shown, the base 1 adopts a perforated plate design. During the brazing process, heat can be quickly transferred to the bottom of the cold plate through the perforations, thereby improving brazing efficiency and quality.

[0062] Above the cold plate, a quick-release clamping device 3 is installed. This device can be quickly connected and disconnected from the four columns 2 by horizontal rotation. Specifically, an adjusting nut 5 is installed on the top of each of the four columns 2. By tightening or loosening the adjusting nut 5, the quick-release clamping device 3 can be tightened or loosened, thereby achieving the clamping or loosening operation of the cold plate. Furthermore, the clamping force of the quick-release clamping device 3 on the cold plate can be precisely adjusted by turning the adjusting nut 5 to meet the requirements of different brazing processes.

[0063] Furthermore, as shown in the appendix Figure 6 and 7 As shown in detail, the quick-release clamping device 3 consists of a crossbeam 3-1 and a quick-release connecting plate 3-2. The length direction of the crossbeam 3-1 is parallel to the length axis of the cold plate, ensuring uniform distribution of clamping force. Quick-release connecting plates 3-2 are respectively installed at the top of both ends of the crossbeam 3-1, and the middle of the quick-release connecting plate 3-2 is rotatably connected to the crossbeam 3-1, allowing the quick-release connecting plate 3-2 to rotate horizontally around its middle position. Both ends of the quick-release connecting plate 3-2 are equipped with hooks that match the shape and size of the column 2. By horizontally rotating the quick-release connecting plate 3-2, the hooks can quickly engage or disengage with the column 2, thereby enabling rapid installation and disassembly of the quick-release clamping device 3 and greatly improving the efficiency of brazing operations.

[0064] The specific operating steps for brazing are as follows:

[0065] S1: First, adjust the positions of the four columns 2 on the base 1 according to the actual length of the cold plate to be brazed, and ensure that the columns 2 are accurately aligned with the connecting holes on the base 1 before threading them together. Next, install adjusting nuts 5 on the top of the four columns 2 to prepare for the subsequent tightening operation.

[0066] S2: Place the cold plate to be brazed stably on the base 1, and ensure that the cold plate is within the area enclosed by the four columns 2 so that the quick-release clamping device 3 can effectively clamp the cold plate.

[0067] S3: Place the quick-release clamping device 3 above the cold plate, and rotate the quick-release connecting plate 3-2 to make the hooks at both ends of the quick-release connecting plate 3-2 accurately engage with the corresponding column 2, thereby realizing the quick connection between the quick-release clamping device 3 and the column 2, and thus initially fixing the cold plate on the base 1.

[0068] S4: Tighten the adjusting nut 5 to press the quick-release connecting plate 3-2 downwards. The quick-release connecting plate 3-2, under pressure, transmits the pressure to the crossbeam 3-1, which ultimately presses the cold plate firmly onto the base 1. During the pressing process, the clamping force can be precisely controlled by turning the adjusting nut 5 to ensure the cold plate remains stable during brazing and to avoid affecting the brazing quality and the integrity of the cold plate due to insufficient or excessive clamping force.

[0069] S5: After the clamping operation is completed, send the entire cold plate along with the brazing device into the brazing furnace for brazing. After brazing is completed, rotate the quick-release connecting plate 3-2 in the opposite direction to separate the hook from the column 2, and then quickly remove the quick-release clamping device 3 to complete one brazing cycle.

[0070] It is worth noting that the opening end of the quick-release connecting plate 3-2 hook has a chamfered structure. This design detail eliminates the need for frequent adjustments to the position of the adjusting nut 5 when performing continuous brazing operations on cold plates of the same specifications. After the next cold plate to be brazed is placed on the base 1, the quick-release clamping device 3 is placed above the cold plate. Simply rotate the quick-release connecting plate 3-2 to accurately engage the hook with the column 2, which quickly achieves the clamping and fixing of the cold plate, significantly improving the continuity and overall efficiency of the brazing operation.

[0071] Example 2:

[0072] Combined with appendix Figures 6-8 As shown, in this embodiment, the cold plate brazing device and brazing method provided are further optimized and improved based on Embodiment 1. Specifically, multiple clamping plates 3-3 are evenly spaced along the length of the bottom of the crossbeam 3-1, and the middle position of the clamping plates 3-3 is connected to the crossbeam 3-1 by a hinge. This design allows the clamping plates 3-3 to rotate flexibly, thereby better conforming to the surface of the cold plate. Through the simultaneous action of multiple clamping plates 3-3, the stress points of the cold plate are increased, making the stress on the cold plate more uniform during the brazing process, effectively reducing the risk of deformation after brazing, improving the brazing quality, and even achieving the ideal effect of almost no deformation after brazing of the cold plate to a certain extent.

[0073] Furthermore, to facilitate the operator's rotation of the quick-release clamping device 3 and the transfer of the entire device, a handle 3-4 is installed on the quick-release connecting plate 3-2. The operator can easily rotate the quick-release connecting plate 3-2 using the handle 3-4 to quickly connect and disconnect the quick-release clamping device 3 from the column 2. Simultaneously, when it is necessary to transfer the entire cold-plate brazing device along with the cold plate to the brazing furnace conveyor belt, or when only the quick-release clamping device 3 needs to be transferred, the handle 3-4 provides a convenient means of operation, greatly improving the convenience and efficiency of the operation.

[0074] Furthermore, the two ends of the clamping plate 3-3 are provided with U-shaped grooves, and an adaptive clamping device 4 is cleverly installed in the U-shaped grooves, as shown in the attached figure. Figure 8 As shown in detail, the adaptive clamping device 4 consists of key components such as a threaded sleeve 4-1, an adjusting sleeve 4-2, and a clamping column 4-3. The two sides of the threaded sleeve 4-1 are hinged to the two walls of the U-shaped groove of the clamping plate 3-3, allowing the threaded sleeve 4-1 to deflect at a certain angle within the U-shaped groove. This ensures that the threaded sleeve 4-1 remains perpendicular to the surface of the cold plate, providing stable mechanical support for subsequent clamping operations.

[0075] An adjusting sleeve 4-2 is threadedly connected to the inner hole of the threaded sleeve 4-1. The length of the adjusting sleeve 4-2 is designed to be greater than that of the threaded sleeve 4-1. This design allows the operator to flexibly adjust the height of the adjusting sleeve 4-2 relative to the threaded sleeve 4-1 by turning it, thereby achieving precise control of the clamping force. A clamping column 4-3 is movably inserted into the adjusting sleeve 4-2. A clamping plate 4-4 is provided at its bottom. A clamping spring 4-5 is movably sleeved on the column of the clamping column 4-3, which is located between the adjusting sleeve 4-2 and the clamping plate 4-4. By adjusting the height of the adjusting sleeve 4-2 relative to the threaded sleeve 4-1, the compression of the clamping spring 4-5 can be changed, thereby precisely controlling the clamping force of the clamping plate 4-4 on the cold plate, ensuring that the cold plate is subjected to uniform force during brazing, and further improving the brazing quality.

[0076] Furthermore, the clamping spring 4-5 provides the clamping plate 3-3, crossbeam 3-1, and quick-release connecting plate 3-2 with a certain vertical synchronous floating space. During the installation and disassembly of the quick-release clamping device 3, this floating space allows the quick-release connecting plate 3-2 to first move to a suitable position before rotation, thus facilitating the engagement and disengagement of the hook with the column 2 more conveniently and quickly, improving the smoothness and efficiency of the entire operation. It also effectively copes with the thermal expansion generated during cold plate brazing operations.

[0077] Furthermore, the top two sides of the adjusting sleeve 4-2 are provided with wing plates 4-6. The design of these wing plates 4-6 allows operators to more easily and quickly screw on the adjusting sleeve 4-2 without the need for additional tools, simplifying the operation process and improving work efficiency. At the same time, a retaining spring 4-7 is installed on the top of the clamping column 4-3. The effective function of the retaining spring 4-7 is to prevent the clamping column 4-3 from accidentally detaching from the adjusting sleeve 4-2 during use, ensuring the structural stability and reliability of the entire adaptive clamping device 4, and avoiding the disruption of brazing operations due to component detachment.

[0078] Example 3:

[0079] Combined with appendix Figure 1 , 9As shown in Figure 10, this embodiment further innovates and improves upon Embodiment 1 or 2, proposing a novel cold plate brazing device and brazing method. In this device, a force transmission component 6 is cleverly arranged between the bottom of the crossbeam 3-1 and the cold plate. The force transmission component 6 mainly includes a ceramic pressure block 6-1 and a connecting rod 6-2.

[0080] Multiple ceramic pressure blocks 6-1 are evenly spaced along the length of the crossbeam 3-1. The tops of the multiple ceramic pressure blocks 6-1 are neatly arranged on the same plane, and their bottoms are precisely fitted to the corresponding positions of the cold plate. By transmitting force through the ceramic pressure blocks 6-1, the force distribution of the cold plate can be further optimized, making the force more uniform. This effectively reduces the probability of deformation of the cold plate after brazing during the pressing process, and improves the stability of the brazing quality.

[0081] Specifically, the selected ceramic clamping block 6-1 is made of silicon nitride ceramic, which has high thermal conductivity, enabling rapid heat transfer during brazing and avoiding adverse effects on the brazing process, ensuring that the brazing result meets process requirements. Simultaneously, to balance force transfer performance and weight reduction, elongated through holes are designed on the top and sides of the ceramic clamping block 6-1. This structural design not only does not obstruct heat transfer, ensuring efficient heat conduction during brazing, but also effectively reduces the weight of the ceramic clamping block 6-1, lightening the burden on the entire device and facilitating operation and handling.

[0082] Furthermore, both ends of the ceramic pressure block 6-1 are provided with vertical slots, and two connecting rods 6-2 are respectively inserted into the slots at both ends of the ceramic pressure block 6-1. In this way, multiple ceramic pressure blocks 6-1 can be combined into a whole structure, ensuring its stability during use. However, it should be noted that each ceramic pressure block 6-1 retains a certain degree of independence after assembly, and can fully contact the surface of the cold plate to ensure force transmission effect. In addition, this design also facilitates the quick assembly or disassembly of all ceramic pressure blocks 6-1 with the cold plate, improving work efficiency. When dealing with cold plates of different specifications, some ceramic pressure blocks 6-1 can be flexibly replaced according to actual needs, further improving the versatility and adaptability of the device and helping to reduce production costs.

[0083] Isolation rings 6-3 are fitted onto the connecting rod 6-2, which is located between two adjacent ceramic pressure blocks 6-1. The isolation rings 6-3 are designed to ensure that each ceramic pressure block 6-1 maintains appropriate independence and avoids mutual interference. Furthermore, the thickness of the isolation rings 6-3 is designed to match the thickness of the fins on the cold plate, allowing each ceramic pressure block 6-1 to be precisely placed within the cavity between two adjacent fins on the cold plate, greatly improving assembly efficiency and accuracy.

[0084] In addition, limit nuts 6-4 are threadedly connected to both ends of the two connecting rods 6-2. The main function of the limit nuts 6-4 is to prevent the connecting rods 6-2 from accidentally detaching from the ceramic pressure block 6-1 during use, thus ensuring the structural integrity and reliability of the entire force transmission assembly 6.

[0085] Furthermore, a limiting spring 6-5 is cleverly fitted onto the connecting rod 6-2, located between the limiting nut 6-4 and the ceramic pressure block 6-1. The limiting spring 6-5 provides the ceramic pressure block 6-1 with a certain degree of floating adjustment capability along the axial direction of the connecting rod 6-2. This allows each ceramic pressure block 6-1 to more flexibly adapt to the gaps between adjacent fins on the cold plate during assembly, further improving the convenience and efficiency of assembly.

[0086] The parts of this invention not described in detail are prior art. It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to encompass all changes falling within the meaning and scope of equivalents within this invention.

Claims

1. A cold-plate brazing device, characterized in that, include: The base (1) has multiple connecting holes spaced apart on both sides; the base (1) is used to support the cold plate; Four columns (2) are located at the four corners of the cold plate; the bottom of the columns (2) is threadedly connected to the corresponding connecting holes of the base (1); A quick-release clamping device (3) is located above the cold plate and is quickly connected to four columns (2) by horizontal rotation; it is used to clamp the cold plate. Four adjusting nuts (5) are installed on the top of the four columns (2) respectively; used to adjust the clamping force of the quick-release clamping device (3).

2. The cold plate brazing apparatus as described in claim 1, characterized in that, The quick-release clamping device (3) includes: Crossbeam (3-1); There are two quick-release connecting plates (3-2), which are respectively located at the top of both ends of the crossbeam (3-1). The middle part of the quick-release connecting plate (3-2) is rotatably connected to the crossbeam (3-1). Both ends of the quick-release connecting plate (3-2) are provided with hooks that can be matched with the corresponding columns (2). By rotating the quick-release connecting plate (3-2) horizontally, the hooks at both ends of the quick-release connecting plate (3-2) can be engaged or disengaged from the corresponding columns (2) to achieve quick release.

3. The cold plate brazing apparatus as described in claim 2, characterized in that: The bottom of the crossbeam (3-1) is provided with multiple clamping plates (3-3) spaced apart along the length direction, and the middle position of the clamping plate (3-3) is hinged to the crossbeam (3-1); a handle (3-4) is installed on the quick-release connecting plate (3-2).

4. The cold plate brazing apparatus as described in claim 3, characterized in that, The clamping plate (3-3) has U-shaped grooves at both ends, and an adaptive clamping device (4) is installed in the U-shaped grooves; the adaptive clamping device (4) includes: The threaded sleeve (4-1) is hinged on both sides to the corresponding groove walls of the U-shaped groove of the clamping plate (3-3); Adjusting sleeve (4-2) is threadedly connected to the inner hole of threaded sleeve (4-1), and the length of adjusting sleeve (4-2) is greater than the length of threaded sleeve (4-1); The clamping column (4-3) is movably inserted into the adjusting sleeve (4-2); The clamping plate (4-4) is located at the bottom of the clamping column (4-3); The compression spring (4-5) is movably sleeved on the column body between the adjusting sleeve (4-2) and the compression plate (4-4) corresponding to the compression column (4-3).

5. The cold plate brazing apparatus as described in claim 4, characterized in that: The top two sides of the adjusting sleeve (4-2) are provided with wing plates (4-6).

6. The cold plate brazing apparatus as described in claim 4, characterized in that: A retaining ring (4-7) is installed on the top of the clamping column (4-3).

7. The cold plate brazing apparatus as described in claim 2, characterized in that, A force transmission component (6) is provided between the bottom of the crossbeam (3-1) and the cold plate; the force transmission component (6) includes: Ceramic blocks (6-1) are arranged at intervals along the length of the crossbeam (3-1). The tops of the ceramic blocks (6-1) are flush, and the bottoms are adapted to the corresponding positions of the cold plate. Both sections of the ceramic blocks (6-1) are provided with vertical strip grooves. Two connecting rods (6-2) are respectively inserted into the strip grooves at both ends of the ceramic pressing block (6-1); used to assemble multiple ceramic pressing blocks (6-1) into a single structure; The isolation ring (6-3) is sleeved on the rod body between two adjacent ceramic pressure blocks (6-1) of the connecting rod (6-2); There are four limit nuts (6-4), which are installed at both ends of the two connecting rods (6-2).

8. The cold plate brazing apparatus as described in claim 7, characterized in that: A limiting spring (6-5) is fitted on the rod body between the limiting nut (6-4) and the ceramic pressure block (6-1) of the connecting rod (6-2).

9. The cold plate brazing apparatus as described in claim 7, characterized in that: The ceramic block (6-1) is made of silicon nitride ceramic, and the top and sides of the ceramic block (6-1) are provided with elongated through holes.

10. The brazing method using the cold plate brazing apparatus according to claim 2, characterized in that, Includes the following steps: S1. Adjust the position of the four columns (2) according to the length of the cold plate, and install adjusting nuts (5) on the top of the four columns (2). S2. Place the cold plate on the base (1) and position the cold plate between the four columns (2); S3. Place the quick-release clamping device (3) on the cold plate, and rotate the quick-release connecting plate (3-2) so that the hooks at both ends of the quick-release connecting plate (3-2) are engaged with the corresponding columns (2); S4. Tighten the adjusting nut (5) so that the adjusting nut (5) presses against the quick-release connecting plate (3-2), the quick-release connecting plate (3-2) presses against the crossbeam (3-1), and the crossbeam (3-1) presses against the cold plate; S5. Send the cold plate into the brazing furnace for brazing. After brazing, rotate the quick-release connecting plate (3-2) in the opposite direction to remove the quick-release clamping device (3).

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