Anti-deformation ultra-thin electronic heat dissipation water-cooled plate precision welding tooling

Abstract

The application discloses a precision welding tool for anti-deformation ultra-thin electronic heat-dissipation water-cooling plate, and relates to the technical field of welding tools.The tool is based on the mode of fixing the base plate by the pneumatic telescopic jacks at the edges of the action frame plate, and the key is to set a suspended dynamic floating frame in the action frame plate, which is kept in a horizontal suspended state by a ball head connecting rod.In the welding process, the contact balls in the dynamic floating frame are displaced with the deformation of the base plate, triggering the array weight sensor to form a dynamic balance feedback.According to the detected inclination parameters, the pneumatic telescopic jacks at the inflection point pressure adjusting part and the edge pressure input part are preferentially adjusted to realize real-time dynamic suppression of the welding deformation.In the application, the local warping and bulging deformation in the welding process of the ultra-thin water-cooling plate can be precisely controlled, and the welding flatness and sealing performance are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of welding fixture technology, specifically to a precision welding fixture for an anti-deformation ultra-thin electronic heat dissipation water-cooled plate. Background Technology

[0002] For welding processes involving high sealing requirements, such as water-cooled heat dissipation plates, welding quality is a key factor affecting subsequent performance. Vacuum brazing and laser welding are commonly used techniques. However, considering the welding principles and the structure of ultra-thin electronic water-cooled heat dissipation plates, the following supplementary information is provided: The welding process inevitably involves changes in temperature difference. Heat is one of the key factors affecting changes in material stress. Common problems include local deformation and warping of the material. The thinner the metal panel of the ultra-thin heat dissipation water cooling plate, the more heat transfer "paths" it has, thus achieving the best heat dissipation (heat exchange efficiency). However, under the premise that the external welding working environment and the physical properties of the panel remain consistent, the thinner the metal panel, the easier it is to deform, especially in high temperature difference working environments. In addition to conventional welding fixtures, which mostly serve two basic functions of positioning and clamping, it is also necessary to consider the local deformation process during the welding of ultra-thin metal panels. The deformation process is mostly concentrated around the weld seam. Currently, the welding fixtures for ultra-thin electronic heat dissipation water-cooling plates in the industry are mainly divided into two categories: one is the integral graphite pressure plate fixture used for vacuum brazing process, which controls deformation through overall pressure and temperature uniformity, as described in the technical content of publication number CN102357702A; the other is the multi-point independent clamping fixture used for laser welding process. Although the heat input is small, it can only clamp the edge area. Bulging deformation is prone to occur at the flow channel partition wall around the weld seam, and the deformation can reach more than 0.15mm, as described in the technical content of publication number CN120533261A. Specifically, the high temperature difference during welding generates thermal stress, which leads to material deformation. This deformation is more severe in ultra-thin plates. Therefore, how to detect the deformation state and minimize the deformation around the weld is a problem that needs to be solved. To this end, a solution is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a precision welding fixture for anti-deformation ultra-thin electronic heat dissipation water-cooled plates, in order to solve the above-mentioned technical problems.

[0004] The objective of this invention can be achieved through the following technical solution: a precision welding fixture for an anti-deformation ultra-thin electronic heat dissipation water-cooled plate, comprising a substrate body, an action frame plate and an action cylinder, wherein multiple pneumatic telescopic top columns perpendicular to the substrate body are provided at the edge of the action frame plate, the action frame plate moves to a position directly above the substrate body, and the substrate body is fixed by the pneumatic telescopic top columns and the action cylinder. The lower interior of the motion frame plate is hollow and has a dynamic floating frame. Ball-head connecting rods are provided at the center point of the upper and lower surfaces of the dynamic floating frame, and the ball-head connecting rods are kept in a movable connection with the dynamic floating frame. The dynamic floating frame is kept horizontally suspended relative to the action frame plate by two ball joints, and multiple arrayed weight sensors are installed on the bottom surface of the dynamic floating frame. Contact balls are arranged along the center point area inside the dynamic floating frame.

[0005] The configuration is further defined as follows: multiple pneumatic telescopic top columns distributed along one side of the action frame plate are configured as pressure input units and are integral structures, and the pneumatic telescopic top columns located at the four inflection points of the action frame plate are configured as pressure adjustment units.

[0006] The configuration is further defined as follows: the ball joint connecting rod located on the upper side of the dynamic floating frame is fixedly connected to the action frame plate in the vertical direction, and the lower end of the ball joint connecting rod located on the lower side maintains horizontal contact with the base plate body.

[0007] The configuration is further defined as follows: four vertically oriented elastic contact rods are installed at the four inflection points on the lower surface of the dynamic floating frame, and the lower side of the elastic contact rods maintains contact with the upper surface of the substrate body.

[0008] The configuration is further defined as follows: a wedge is provided on the bottom surface of the dynamic floating frame corresponding to the middle area of ​​multiple weight sensors, and each wedge is distributed with an upward arc-shaped protrusion.

[0009] The configuration is further defined as follows: a dynamic balance feedback area is provided along the initial position of the contact ball in the dynamic floating frame. The dynamic balance feedback area radiates outward from the center point of the dynamic floating frame, and a contact response mechanism corresponding to the weight sensor is formed in the dynamic balance feedback area. In the contact response mechanism, the tilt parameter of the dynamic floating frame is calculated based on the information feedback position of the weight sensor. Finally, the pneumatic telescopic top column at the pressure regulating part is adjusted first based on the tilt parameter of the dynamic floating frame, and then the pneumatic telescopic top column at the pressure input part is adjusted secondarily.

[0010] The present invention has the following beneficial effects: 1. Using a suspended dynamic floating frame as the deformation sensing carrier, the microscopic deformation of the substrate is responded to without delay by the free displacement of the contact ball. No additional complex sensing wiring is required. The deformation area and tilt degree can be accurately located by relying on the contact response of the array weight sensor. The deformation sensing and clamping force adjustment form a closed-loop control, which intervenes in the early stage of deformation induced by welding thermal stress, rather than remedying it after deformation occurs. This reduces the impact of thermal stress on the deformation of ultra-thin plates from the root. The feedback method of combining mechanics and sensing has strong stability and can maintain detection accuracy even in the high temperature environment of welding. It avoids the interference of the high temperature environment on the detection element, realizes precise control of deformation throughout the welding process, ensures the overall flatness and weld sealing consistency of the water-cooled plate after welding, and avoids leakage and assembly mismatch problems in subsequent use.

[0011] 2. In response to the characteristics of stress concentration and deformation occurring first in the inflection point area during the welding of ultra-thin plates, the clamping force at the inflection point is adjusted first to form a gradient clamping force distribution from the core deformation area to the edge area. This avoids the problem of excessive or insufficient local pressure on the plate caused by uniform overall pressure. Combined with the flexible contact structure of the elastic contact rod and ball joint under the dynamic floating frame, it will not cause rigid pressure damage to the ultra-thin plate. At the same time, it can adapt to the slight planar error of the plate itself to ensure uniform clamping force at each contact point. This structure does not require large-scale tooling modifications for ultra-thin plates of different thicknesses. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a structural schematic diagram of a precision welding fixture for an anti-deformation ultra-thin electronic heat dissipation water-cooled plate proposed in this invention; Figure 2 For the present invention Figure 1 Top view; Figure 3 For the present invention Figure 1 A cross-sectional view of the central action frame plate; Figure 4 For the present invention Figure 3 A cross-sectional view of the dynamic floating frame in the middle; Figure 5 This is a top-down view of the interior of the dynamic floating frame of the present invention; Figure 6 This is a schematic diagram of the action area of ​​the contact ball in the floating idler of the present invention.

[0014] In the diagram: 1. Action frame plate; 2. Pneumatic telescopic top column; 201. Pressure input unit; 202. Pressure adjustment unit; 3. Base plate body; 4. Ball joint; 5. Dynamic floating frame; 6. Elastic contact rod; 7. Contact ball; 8. Weight sensor; 9. Wedge head. Detailed Implementation

[0015] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Example 1: The welding of ultra-thin electronic heat dissipation water-cooled plates mainly achieves a sealed connection of the plates through vacuum brazing or laser welding. During the welding process, the high-temperature heat input will generate uneven thermal stress inside the workpiece, which is the root cause of welding deformation. The core technical problem currently facing the welding of ultra-thin water-cooled plates is: Ultra-thin plates are typically 0.5-1.5mm thick. They have a fast heat transfer rate but poor rigidity. High welding temperatures can easily cause local warping, bulging, and other deformations. Conventional welding fixtures only have basic positioning and clamping functions and cannot detect minute deformations during the welding process in real time. They also cannot dynamically adjust the clamping force according to the deformation state. As a result, the amount of deformation at the flow channel partition around the weld is difficult to control, which directly affects the sealing performance and flatness requirements of the water-cooled plate. Reference Figures 1-6 The present invention proposes a precision welding fixture for anti-deformation ultra-thin electronic heat dissipation water-cooled plates. By setting up a floating balance detection unit and a graded pressure adjustment system, it monitors the slight tilting deformation of the substrate in real time throughout the welding process and dynamically adjusts the clamping force at each point according to the detection signal, thereby achieving active suppression and precise control of welding deformation and fundamentally solving the deformation control problem in the welding process of ultra-thin water-cooled plates. The general direction is as follows: First, the detection method is improved, from fixed rigid detection to suspended follow-up detection, which greatly improves the sensitivity of deformation perception; second, the control mode is improved, from open-loop static clamping to closed-loop dynamic adjustment, which realizes active intervention in the entire welding process; third, the adjustment strategy is improved, from overall uniform clamping to graded differentiated adjustment, which avoids stress concentration while achieving precise correction.

[0017] Example 2: Based on the technical framework proposed in Example 1, the following supplements are made in conjunction with relevant technical features, specifically incorporating the fixing process during welding: First, the substrate body 3 to be welded is placed in the positioning area of ​​the tooling machine. The action frame plate 1 is moved to directly above the substrate body 3 by the drive mechanism (such as a robotic arm structure) to complete the initial alignment of the tooling and the workpiece. This process ensures the coaxiality accuracy of the welding tooling and the workpiece, laying the foundation for subsequent precise clamping and avoiding uneven distribution of clamping force due to alignment deviation. This part does not need to be limited. Subsequently, the pneumatic telescopic top columns 2 distributed along the edge of the action frame plate 1 extend downwards synchronously. The pneumatic telescopic top columns 2 distributed on each side serve as pressure input parts 201 and first contact the surface of the substrate body 3 to provide a basic and uniform pre-compression force, so that the substrate as a whole remains flat. This step provides a stable support plane for the substrate by establishing a basic compression force in advance, effectively preventing the substrate from shifting as a whole during subsequent adjustment. The pneumatic telescopic top column 2, located at the four inflection points of the action frame plate 1, follows as the pressure adjustment unit 202 to achieve graded clamping control of the edge area. By distinguishing between the functional zones of regular clamping and precise adjustment, the stress concentration problem caused by uniform clamping is avoided. At the same time, an independent execution channel is reserved for subsequent dynamic adjustment to ensure that the correction action in the inflection point area will not affect the basic clamping state of the edge area. It should also be noted that the overall clamping force still depends on the pressure input unit 201. In actual cases, the pressure adjustment unit 202 is mainly used for pressure adjustment in the subsequent welding process. During the pressing process, the dynamic floating frame 5 is kept in a horizontally suspended state by the ball joints 4 on the upper and lower sides. Because the upper ball joint 4 is fixedly connected to the action frame plate 1 to provide suspension support, and the lower end of the lower ball joint 4 is in horizontal contact with the surface of the substrate body 3, it can maintain a relatively suspended state under the action of gravity and without external interference. However, although the elastic contact rod 6 on the lower side of the dynamic floating frame 5 is not the main pressing unit, but the contact unit, when the overall substrate welding process is locally warped, the elastic contact rod 6 can indirectly reflect the balance state of the dynamic floating frame 3. The floating support structure ensures that the dynamic floating frame 5 can tilt synchronously with the slight deformation of the substrate body 3, realize the accurate transmission of the deformation state, and eliminate the detection lag problem caused by rigid connection.

[0018] Meanwhile, the elastic touch rods 6 at the four inflection points on the lower surface of the dynamic floating frame 5 maintain elastic contact with the upper surface of the substrate body 3, providing auxiliary support and eliminating contact gaps, ensuring the sensitivity and reliability of deformation detection, avoiding signal loss or misjudgment due to poor contact, and enabling the dynamic floating frame 5 to truly reflect the actual deformation state of the substrate body 3. However, it should be added that the pressure output by the pneumatic telescopic top post 2 at each pressure input section 201 is a constant value. Therefore, in actual situations, the local warping problem caused by the substrate will offset the input pressure at the pneumatic telescopic top post 2, as shown below: During the welding process, when the substrate body 3 undergoes local deformation due to thermal stress, it will cause the dynamic floating frame 5 to tilt accordingly. At this time, the contact ball 7 located at the center point inside the dynamic floating frame 5 rolls along the tilt direction under the action of gravity. This step utilizes the principle of gravity sensing to achieve mechanical amplification of deformation, transforming the slight tilt of the substrate into a significant displacement of the contact ball 7, which significantly improves the sensitivity of deformation detection. After being guided by the arc-shaped guide surface of the wedge head 9, the contact ball 7 falls precisely onto the weight sensor 8 at the corresponding position. The arc-shaped guide structure of the wedge head 9 ensures that the contact ball 7 can accurately reach the detection position along the preset path, avoiding signal errors caused by deviation of the rolling path and ensuring the accuracy of the detection results. The displacement direction and distance of the contact ball 7 directly reflect the tilt direction and angle of the dynamic floating frame 5. The pressure signal collected by the weight sensor 8 is converted into tilt parameters by the control system, realizing real-time, non-contact detection of welding deformation. This detection method does not require complex electronic sensing equipment and can achieve high-precision deformation identification through a purely mechanical structure. Based on feedback from the weight sensor 8, the control system prioritizes adjusting the extension pressure and stroke of the pneumatic telescopic top column 2 at the pressure regulating unit 202, and then adjusts the pneumatic telescopic top column 2 at the pressure input unit 201. Through the graded adjustment mechanism, the dynamic matching of the clamping force is achieved, so that the substrate body 3 returns to a horizontal state. Prioritizing the adjustment of the inflection point area can quickly correct the main deformation trend, while the secondary adjustment of the edge area can further optimize the overall flatness. This strategy takes into account both correction efficiency and adjustment accuracy.

[0019] This dynamic balance feedback process is continuously executed throughout the entire welding process. Through closed-loop control of "deformation detection - signal feedback - pressure adjustment", the deformation trend caused by welding thermal stress is offset in real time, ultimately achieving precise deformation-free welding of ultra-thin water-cooled plates.

[0020] Example 3: Further explanation of the detection method proposed in this invention: When the substrate undergoes thermal deformation during the welding process, the signal detection circuit is triggered first. The deformation is transmitted to the suspended detection structure through mechanical contact, causing the detection unit to undergo an attitude change in the same direction as the deformation. This attitude change breaks the balance state inside the detection unit, triggering the internal sensing element to generate a corresponding positional offset. The offset sensing element makes contact with the detection contact point at the corresponding position, completing the signal triggering process. This process realizes the conversion of physical deformation into a contact signal. After the signal is triggered, the signal transmission stage begins. Once the detection contact receives the contact signal, it converts the mechanical contact state into an electrical signal and sends it to the central processing unit through the signal transmission line. During the signal transmission process, the integrity and real-time performance of the signal are maintained to ensure that the processing unit can obtain accurate deformation state information without signal delay or distortion.

[0021] After the signal is transmitted to the processing unit, it enters the signal processing stage. The central processing unit identifies the location and trend characteristics of the deformation based on the received contact signals, analyzes and judges them through preset control logic, and determines the adjustment action to be executed and its priority. The signal processing process establishes a correspondence between the deformation state and the adjustment strategy based on the triggering sequence and location of the contacts, forming a clear execution instruction. And reference Figure 6 The following is a supplement to the above content: Figure 6 The thick solid line area forms a ring-shaped area, in which independent response points are set according to the position of the weight sensor 8. In the initial state, the contact ball 7 is located in the center point area of ​​the dynamic floating frame 5, so the weight sensor 8 at this response point will change the signal, but the weight sensors 8 at other positions will not change. However, when the dynamic floating frame 5 tilts, the contact ball 7 slides directionally along the tilt direction and tilt angle of the dynamic floating frame 5, so the weight sensors 8 at other positions will change the signal. The signal occurrence events and positions of multiple weight sensors 8 are integrated into the movement path of the contact ball 7, so the tilt direction and tilt angle of the dynamic floating frame 5 can be indirectly determined. The dynamic floating frame 5 itself does not have the clamping force on the substrate, but only keeps parallel by contacting the substrate surface through the elastic contact rod 6. So when the substrate deforms and warps due to welding thermal stress, the reaction force generated is fed back to the dynamic floating frame 5 through the elastic contact rod 6. This part is the basic principle of the detection process of the present invention. During the response process, the pressure output mode in the pressure regulating unit 202 can be changed first according to the tilt state of the dynamic floating frame 5. Without changing the pneumatic telescopic top column 2 at the pressure input unit 201, the pneumatic telescopic top column 2 at the four inflection points can be changed. The adjustment pressure of each pneumatic telescopic top column 2 is also determined according to the tilt state of the dynamic floating frame 5, which mainly involves the trigonometric function calculation process. This contact response mechanism forms a complete control closed loop. Starting from the moment deformation occurs, it sequentially completes four stages: signal triggering, signal transmission, signal processing, and signal execution. Each stage is closely connected and runs continuously, continuously cycling throughout the entire welding process to achieve real-time response and active suppression of welding deformation.

[0022] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A precision welding fixture for an anti-deformation ultra-thin electronic heat dissipation water-cooled plate, comprising a substrate body (3), an action frame plate (1), and an action cylinder, characterized in that, Multiple pneumatic telescopic top columns (2) of the vertical base plate body (3) are provided at the edge of the action frame plate (1). The action frame plate (1) moves to the position directly above the base plate body (3) and the base plate body (3) is fixed by the pneumatic telescopic top columns (2) and the action air rod. Among them, the lower side of the action frame plate (1) is hollow and is equipped with a dynamic floating frame (5). Ball-head connecting rods (4) are provided at the center point of the upper and lower surfaces of the dynamic floating frame (5), and the ball-head connecting rods (4) and the dynamic floating frame (5) are connected in an active manner. Among them, the dynamic floating frame (5) is kept in a horizontally suspended state relative to the action frame plate (1) by two ball joints (4), and multiple arrayed weight sensors (8) are installed on the bottom surface of the dynamic floating frame (5), and contact rolling balls (7) are set along the center point area inside the dynamic floating frame (5). A dynamic balance feedback area is provided in the dynamic floating frame (5) along the initial position of the contact ball (7). The dynamic balance feedback area radiates outward from the center point of the dynamic floating frame (5), and a contact response mechanism corresponding to the weight sensor (8) is formed in the dynamic balance feedback area. In the contact response mechanism, the tilt parameter of the dynamic floating frame (5) is calculated based on the information feedback position of the weight sensor (8). Finally, the pneumatic telescopic top column (2) at the pressure regulating part (202) is adjusted first based on the tilt parameter of the dynamic floating frame (5), and then the pneumatic telescopic top column (2) at the pressure input part (201) is adjusted secondarily.

2. The precision welding fixture for anti-deformation ultra-thin electronic heat dissipation water-cooled plate according to claim 1, characterized in that, Multiple pneumatic telescopic top columns (2) distributed along one side of the action frame plate (1) are configured as pressure input units (201) and are integral structures, and the pneumatic telescopic top columns (2) located at the four inflection points of the action frame plate (1) are configured as pressure adjustment units (202).

3. The precision welding fixture for anti-deformation ultra-thin electronic heat dissipation water-cooled plate according to claim 2, characterized in that, The ball joint (4) located on the upper side of the dynamic floating frame (5) is fixedly connected to the action frame plate (1) in the vertical direction, and the lower end of the ball joint (4) located on the lower side is in horizontal contact with the base plate body (3).

4. The precision welding fixture for anti-deformation ultra-thin electronic heat dissipation water-cooled plate according to claim 3, characterized in that, The dynamic floating frame (5) has four vertically arranged elastic contact rods (6) installed at the four inflection points on its lower surface. The lower side of the elastic contact rods (6) is in contact with the upper surface of the substrate body (3).

5. The precision welding fixture for anti-deformation ultra-thin electronic heat dissipation water-cooled plate according to claim 4, characterized in that, The bottom surface of the dynamic floating frame (5) is provided with wedges (9) in the middle area corresponding to multiple weight sensors (8), and each wedge (9) is distributed with an upward arc-shaped protrusion.

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