A pressure retaining device

Abstract

The utility model provides a pressure keeping device relates to welding equipment field. Pressure keeping device is used for keeping the pressure between the work piece of waiting to weld, include: the installation frame is provided with the open mouth in the installation frame bottom, its inside swing is provided with the pressing plate; The pressing plate is connected with the pressure bar through the top of installation frame; The movable ram is slidably arranged in the open mouth of installation frame, including a plurality of along the parallel setting movable element of perpendicular to pressure direction; Adjacent movable element is connected between sliding; The deformation body is arranged between the pressing plate and movable ram, is used for transmitting the pressure to movable ram, and can be deformed under the reaction force of any movable element. The present application can adjust the shape of the ram according to different work piece of waiting to weld, to fit different stress surface, is applicable to different work piece of waiting to weld.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment, and more specifically, to a pressure maintaining device. Background Technology

[0002] Pressure welding, a key process for joining metal materials, is widely used in automotive manufacturing, electronic component packaging, aerospace, and other fields. During pressure welding, a certain pressure is typically applied to and maintained on the workpieces to ensure stable welding. Traditional pressure holding devices usually work with a fixed pressure head, applying pressure to the workpiece through preset pressure and stroke parameters.

[0003] However, in actual use, due to the unevenness of the pressure surface of different workpieces to be welded and / or the presence of electrical components of varying heights, traditional pressure holding devices are difficult to apply to pressure welding of different workpieces, requiring frequent replacement of pressure heads, which is time-consuming and labor-intensive.

[0004] Therefore, traditional pressure holding devices suffer from problems such as poor workpiece adaptability and cumbersome process adjustments. Utility Model Content

[0005] The purpose of this invention is to provide a pressure holding device that can adaptively adjust the shape of the pressure head according to different workpieces to be welded, so as to fit different force surfaces and is suitable for different workpieces to be welded.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A pressure maintaining device for maintaining pressure between workpieces to be welded, the pressure maintaining device comprising:

[0008] The mounting frame has an opening at the bottom, and a pressure plate is movably installed inside it; the pressure plate is connected to a pressure rod passing through the top of the mounting frame;

[0009] The movable pressure head is slidably disposed at one open end of the mounting frame and includes multiple movable parts arranged in parallel along the direction perpendicular to the pressure direction; adjacent movable parts are slidably connected.

[0010] A deformable body, disposed between the pressure plate and the movable pressure head, is used to transmit pressure to the movable pressure head and can deform under the reaction force of either of the movable parts.

[0011] Furthermore, in this utility model, the movable component has a plate-like structure, and multiple movable components are arranged in close contact.

[0012] Furthermore, in this utility model, grooves are respectively provided on both sides of the movable component along the arrangement direction; the grooves of adjacent movable components are arranged opposite to each other and form a cavity, and an elastic structure is provided in the cavity.

[0013] Furthermore, in this invention, the elastic structure includes multiple second springs arranged along the pressure direction, and a first ball is disposed between adjacent second springs; the first ball makes rolling contact with the inner wall of the cavity.

[0014] Furthermore, in this invention, the outer side of the movable pressure head is rolledly connected to the inner wall of the mounting frame via a second ball bearing.

[0015] Furthermore, in this utility model, the outer wall of the pressure rod is provided with external threads and is threadedly connected to the mounting frame.

[0016] Furthermore, in this utility model, a first spring is sleeved on the outside of the pressure rod, and the two ends of the first spring are respectively connected to the pressure plate and the inside of the mounting frame.

[0017] Furthermore, in this invention, the deformable body includes a balloon, which is disposed in the space between the pressure plate and the movable pressure head, and the balloon is filled with a fluid medium.

[0018] Furthermore, in this invention, the balloon is made of a high-temperature resistant elastic material.

[0019] Furthermore, in this invention, the deformable body comprises a plurality of granular bodies, which fill the space between the pressure plate and the movable pressure head.

[0020] This utility model has at least the following advantages or beneficial effects:

[0021] This utility model comprises a mounting frame, a pressure plate, a movable pressure head, and a deformable body. The mounting frame provides support for the pressure plate, movable pressure head, and deformable body. The pressure plate is movably disposed within the mounting frame and connected to one end of a pressure rod passing through the mounting frame. Driving the pressure rod causes the pressure plate to move up and down within the mounting frame, applying pressure to the deformable body and the movable pressure head. The movable pressure head slides through the lower end of the mounting frame, with one end located within the mounting frame and the other end directly contacting the workpiece to be welded, applying pressure to the workpiece. The movable pressure head is configured as multiple movable parts arranged in parallel, with adjacent movable parts... The movable pressure head is connected by a sliding joint, consisting of multiple vertically offset movable parts. A deformable body is placed between the movable pressure head and the pressure plate. When the pressure plate moves downward, pressure is transmitted to the movable pressure head via the deformable body, and thus to the workpiece to be welded. Simultaneously, due to the irregular surface of the workpiece, protruding components can lift the corresponding movable parts upward, causing them to move upward and compress the deformable body. This results in deformation of the deformable body at the corresponding position, allowing the movable pressure head to adaptively change its contact surface shape according to the irregular stress surface. This application can adaptively adjust the shape of the pressure head to fit different stress surfaces, making it suitable for various workpieces. Furthermore, the structure is simple and easy to manufacture, saving on pressure head replacement costs and improving welding efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the pressure maintaining device provided in Embodiment 1 of the application;

[0024] Figure 2 A schematic diagram of the initial state of pressure welding for the pressure holding device provided in Embodiment 1 of the application;

[0025] Figure 3 This is a schematic diagram of the pressure holding device during pressure welding provided in Embodiment 1 of the application;

[0026] Figure 4 A schematic diagram of the pressure maintaining device provided in Embodiment 2 of the application;

[0027] Figure 5 A schematic diagram of the initial state of pressure welding for the pressure holding device provided in Embodiment 2 of the application;

[0028] Figure 6This is a schematic diagram of the pressure holding device during pressure welding provided in Embodiment 2 of the application.

[0029] Reference numerals: 1-Housing, 11-Welding space, 2-Workpiece to be welded, 3-Mounting frame, 31-Connecting part, 4-Pressure plate, 5-Pressure rod, 51-First spring, 6-Modible pressure head, 61-Modible part, 611-Groove, 62-Second spring, 63-First ball bearing, 64-Second ball bearing, 7-Deformable body, 8-Solder paste. Detailed Implementation

[0030] Example

[0031] Please refer to Figures 1-3 The figure shown is a schematic diagram of the pressure holding device in an embodiment of this utility model;

[0032] This embodiment provides a pressure maintaining device for maintaining the pressure between the workpiece 2 to be welded and the bottom plate of the housing 1, so as to facilitate welding the workpiece 2 to the bottom plate. The upper part of the housing 1 is provided with an opening for mounting and fixing the pressure welding device. The pressure maintaining device includes a mounting frame 3, a pressure plate 4, a movable pressure head 6, and a deformable body 7. The mounting frame 3 is used to support and fix the pressure plate 4, the movable pressure head 6, and the deformable body 7, and is provided with a connecting part 31 that connects to the upper part of the housing 1. After connection, a pressure welding space 11 is formed between the mounting frame 3 and the housing 1, allowing the movable pressure head 6 to move downward to apply pressure. The bottom of the mounting frame 3 is provided with an opening. The pressure plate 4 is movably disposed in the mounting frame 3 and is connected to one end of a pressure rod 5 that passes through the top of the mounting frame 3. By driving the pressure rod 5, the pressure plate 4 can be moved up and down in the mounting frame 3 to apply pressure to the movable pressure head 6 and the deformable body 7 below. The movable pressure head 6 slides through the end of the mounting frame 3 away from the pressure rod 5, that is, located in the pressure welding space 11 and close to the workpiece 2 to be welded, so as to directly contact the workpiece 2 to apply pressure. The movable pressure head 6 includes multiple movable parts 61 arranged in parallel along the direction perpendicular to the pressure direction, and adjacent movable parts 61 are slidably connected. That is, the movable pressure head 6 is composed of multiple movable parts 61 that can move up and down in a staggered manner. A deformable body 7 is provided between the pressure plate 4 and the movable pressure head 6. When the pressure plate 4 is driven to move down, the pressure plate 4 can transmit the force to the movable pressure head 6 through the deformable body 7. When the movable pressure head 6 moves down and contacts the irregular force-bearing surface of the workpiece 2 to be welded, its protruding electrical components can squeeze the movable part 61 at the corresponding position and push it upward. The movable part 61 moves up and squeezes the deformable body 7, so that the corresponding position of the deformable body 7 deforms to counteract the corresponding reaction force.

[0033] Understandably, although the number, position, and height of the protruding electrical components on the workpiece 2 to be welded are different, the multiple moving parts 61 can adaptively fit each electrical component after being moved up and down by the reaction force, and transmit the pressure to the irregular force-bearing surface of the workpiece 2 to be welded. This allows each electrical component and the gaps between the electrical components to be subjected to pressure, so as to balance the pressure distribution and protect the electrical components from damage. Moreover, there is no need to customize a special pressure welding head for different workpieces 2 to be welded, nor is it necessary to frequently change the pressure head, which can save costs and improve efficiency.

[0034] As an example, such as Figure 1 The aforementioned mounting frame 3 has a semi-enclosed structure, which has space inside to accommodate the pressure plate 4, the deformable body 7, and the movable pressure head 6. The pressure rod 5 passes through its top and has an opening at its bottom. A pressure welding space 11 is formed between the mounting frame 3 and the housing 1 for the movable pressure head 6 to move. The edge of the mounting frame 3 is provided with a connecting part 31, and the mounting frame 3 is detachably connected to the upper part of the housing 1 through the connecting part 31. In this embodiment, the connecting part 31 adopts bolt holes, and the upper end face of the side plate of the housing 1 is provided with threaded holes. The mounting frame 3 and the housing 1 are connected by screws.

[0035] In this embodiment, as Figures 2-3 The workpiece 2 to be soldered is soldered to the bottom of the inner shell 1. Before soldering, a layer of solder paste 8 is laid on the bottom of the inner shell 1. Then the workpiece 2 to be soldered is placed on the solder paste 8. The pressure rod 5 is driven to maintain a certain pressure between the workpiece 2 to be soldered and the bottom of the shell 1. Then it is placed on the heating table and heated until the solder paste 8 melts. Under the continuous pressure, the workpiece 2 to be soldered can be tightly soldered to the shell 1.

[0036] As an example, the outer wall of the aforementioned pressure rod 5 is provided with external threads and is threadedly connected to the mounting frame 3. A handle is provided at the outer end of the pressure rod 5; rotating the handle drives the pressure rod 5 downwards, thereby causing the pressure plate 4 to move downwards within the mounting frame 3. Understandably, the outer side of the aforementioned pressure plate 4 is in sliding contact with the inner wall of the mounting frame 3. Specifically, structures such as sliders and ball bearings can be provided to guide it and improve its stability during vertical movement.

[0037] To further improve the stability of the pressure plate 4 during movement, a first spring 51 is installed between the pressure plate 4 and the mounting frame 3, and is sleeved on the outside of the pressure rod 5. By installing the first spring 51, the up-and-down movement of the pressure plate 4 is not affected, and the machining error of the threaded connection between the pressure rod 5 and the mounting frame 3 is eliminated. This avoids the pressure rod 5 from shaking due to thread clearance, which would cause the pressure plate 4 to shake and thus lead to unstable pressure on the workpiece 2 to be welded.

[0038] As an example, the aforementioned movable part 61 has a plate-like structure, and multiple movable parts 61 are arranged in close contact to prevent the deformable body 7 above the movable part 61 from falling through the gap between the multiple movable parts 61. Furthermore, the lower ends of the multiple movable parts 61 are flat, forming surface contact with the force-bearing surface to avoid damaging electrical components.

[0039] As an example, the aforementioned movable member 61 has grooves 611 on both sides along its arrangement direction; the grooves 611 of adjacent movable members 61 are arranged opposite each other and form a cavity, and an elastic structure is provided inside the cavity. By providing an elastic structure between two movable members 61, any movable member 61 can move upward under force and return to its original position after the pressure is removed, remaining flush with the other movable members 61, and thus can be used for another different workpiece 2 to be welded.

[0040] In this embodiment, the elastic structure includes multiple second springs 62 arranged along the pressure direction, with a first ball bearing 63 disposed between adjacent second springs 62; the first ball bearing 63 makes rolling contact with the inner wall of the cavity. By distributing the ball bearing 63 between adjacent moving parts 61, rolling friction is formed between them, which reduces the resistance of sliding friction and thus reduces the impact on pressure.

[0041] As an example, the outer side of the movable pressure head 6 is rolledly connected to the inner wall of the mounting frame 3 via a second ball bearing 64. Specifically, the movable part 61 is rolledly connected to the inner wall of the mounting frame 3 via the second ball bearing 64 at the locations where grooves 611 are formed near its end and in its middle. By setting the ball bearings to achieve the rolling connection between the movable pressure head 6 and the mounting frame 3, the stability during its up-and-down movement is increased, while the resistance of sliding friction is reduced.

[0042] As an example, the deformable body 7 includes a balloon disposed in the space between the pressure plate 4 and the movable pressure head 6, and the balloon is filled with a fluid medium. The balloon and the fluid medium form an elastically deformable body 7, which, when squeezed by the movable member 61, counteracts the force of the movable member 61 by deforming, and at the same time can transmit the force of the pressure plate 4 to the movable member 61 to continuously apply pressure to the workpiece 2 to be welded.

[0043] The fluid medium can be a gas or / and a liquid. Preferably, a liquid with high temperature resistance and low heat transfer coefficient can be used, such as silicone oil, which can withstand 250℃ for a long time and has good oxidation resistance; perfluoropolyether oil, which has a thermal conductivity of 0.06–0.09 W / m·K, can withstand 250℃–300℃ for a long time and has strong inertness, etc.

[0044] Similarly, it is understandable that the aforementioned balloon is made of a high-temperature resistant elastic material to prevent damage and fluid leakage at the welding temperature. For example, fluororubber can be used, with a long-term operating temperature of 200°C to 230°C; perfluoroether rubber, with a long-term operating temperature of 280°C to 300°C; or phenyl silicone rubber, with a long-term operating temperature of 200°C-230°C. All of these materials exhibit excellent elastic properties.

[0045] Example

[0046] Please refer to Figures 4-6 The diagram shows the structure of the pressure holding device in this embodiment; the pressure welding device provided in this embodiment is largely the same as the pressure welding device in Embodiment 1, except that:

[0047] The deformable body 7 in this embodiment includes several granular bodies that fill the space between the pressure plate 4 and the movable pressure head 6. When squeezed by the movable part 61, a granular flow occurs between the granular bodies, allowing them to flow and adapt to the squeezing deformation of the movable part 61. Here, granular flow refers to the kinematic relationship between particles, including the static state of mutually bonded particles and their shear failure under external forces. It is widely used to simulate the physical and mechanical properties of discrete media.

[0048] In this embodiment, the aforementioned particles are steel balls, which possess high temperature resistance and high wear resistance, remain stable at pressure welding temperatures, and have a smooth surface and low coefficient of friction, reducing motion resistance. Furthermore, they are virtually incompressible under high pressure, exhibiting excellent volume stability and are not prone to permanent deformation.

[0049] The working principle of the pressure maintaining device provided in this application embodiment is as follows:

[0050] A layer of solder paste 8 is laid at the bottom of the housing 1. The workpiece 2 to be soldered is placed on the solder paste 8, and then the mounting frame 3 is locked to the top of the housing 1. By rotating the handle, the pressure rod 5 is driven to move down, which in turn moves the pressure plate 4 down, pushing the deformable body 7 and the movable pressure head 6 down, so that the movable pressure head 6 fully contacts the force-bearing surface of the workpiece 2 to be soldered and applies sufficient pressure. This pressure state can be maintained for a certain period of time, so that the workpiece 2 to be soldered is stably soldered in the housing 1. After the pressure welding is completed, the pressure rod 5 is rotated in the opposite direction to release the force, and the mounting frame 3 can be removed from the housing 1.

[0051] The beneficial effects of the pressure maintaining device provided in this embodiment are as follows:

[0052] This application solves the problems of poor adaptability, frequent pressure head replacement, and cumbersome operation of traditional pressure welding devices by cooperating with the deformable body 7 and the movable part 61 that can be moved in a staggered manner. It has the advantages of high adaptability, low cost, and high efficiency.

[0053] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pressure maintaining device for maintaining pressure between workpieces to be welded, characterized in that, The pressure maintaining device includes: The mounting frame has an opening at the bottom, and a pressure plate is movably installed inside it; the pressure plate is connected to a pressure rod passing through the top of the mounting frame; The movable pressure head is slidably disposed at one open end of the mounting frame and includes multiple movable parts arranged in parallel along the direction perpendicular to the pressure direction; adjacent movable parts are slidably connected. A deformable body, disposed between the pressure plate and the movable pressure head, is used to transmit pressure to the movable pressure head and can deform under the reaction force of either of the movable parts.

2. The pressure maintaining device according to claim 1, characterized in that, The movable component has a plate-like structure, and multiple movable components are arranged in close fit.

3. The pressure maintaining device according to claim 2, characterized in that, The movable parts are provided with grooves on both sides along the arrangement direction; the grooves of adjacent movable parts are arranged opposite each other and form a cavity, and an elastic structure is provided in the cavity.

4. The pressure maintaining device according to claim 3, characterized in that, The elastic structure includes multiple second springs arranged along the pressure direction, with a first ball disposed between adjacent second springs; the first ball makes rolling contact with the inner wall of the cavity.

5. The pressure maintaining device according to claim 4, characterized in that, The outer side of the movable pressure head is rolledly connected to the inner wall of the mounting frame via a second ball bearing.

6. The pressure maintaining device according to claim 1, characterized in that, The outer wall of the pressure rod is provided with external threads and is threadedly connected to the mounting frame.

7. The pressure maintaining device according to claim 6, characterized in that, A first spring is sleeved on the outside of the pressure rod, and the two ends of the first spring are respectively connected to the pressure plate and the inside of the mounting frame.

8. The pressure maintaining device according to any one of claims 1-7, characterized in that, The deformable body includes a balloon disposed in the space between the pressure plate and the movable pressure head, and the balloon is filled with a fluid medium.

9. The pressure maintaining device according to claim 8, characterized in that, The balloon is made of a high-temperature resistant elastic material.

10. The pressure maintaining device according to any one of claims 1-7, characterized in that, The deformable body comprises a plurality of granular bodies, which fill the space between the pressure plate and the movable pressure head.

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