A micro-porous pressure equalizing gasket for chip copper strip sintering structure

Abstract

The utility model provides a kind of micro-porous pressure-equalizing gasket for sheet copper band sintering structure belongs to sheet copper band sintering technical field, the micro-porous pressure-equalizing gasket for sheet copper band sintering structure, circular ring main body gasket center through-hole inserts center pressure-equalizing ring, outer peripheral wall sticks to inner peripheral wall, outer peripheral fixed ring is fixedly connected main body gasket through not less than 6 circumferential uniform bolt hole;Spiral flow guide passage radial section penetrates upper and lower surface, inner diameter 0.1-2.0 millimeter;Radiation connecting bridge two ends are respectively fixedly connected main body gasket inner peripheral wall and center pressure-equalizing ring outer peripheral wall;Concentric circular ring seal flange protrudes on upper and lower surface, height 0.05-0.5 millimeter;The utility model can solve the technical problem that uneven pressure distribution leads to unstable sintering quality and poor product consistency in the sintering process of sheet copper band in prior art.

Description

Technical Field

[0001] This utility model belongs to the field of sheet copper strip sintering technology, specifically, it relates to a microporous pressure equalizing pad for sheet copper strip sintering structures. Background Technology

[0002] Sintering of sheet copper strips is a crucial process in modern electronic component manufacturing, widely used in circuit board connections, heat dissipation assembly manufacturing, and precision electronic device production. Traditional sheet copper strip sintering processes primarily employ flat pressure gaskets for pressure application, but this simple flat structure has significant technical drawbacks. Existing pressure gaskets are typically made of a single material, with a simple structural design and a lack of effective pressure distribution adjustment mechanisms, resulting in extremely uneven pressure distribution during sintering. The pressure in the central area is often insufficient, while the pressure in the peripheral areas is excessive, causing inconsistent density distribution within the sintered product and affecting the final product's electrical performance and mechanical strength. Existing gaskets generally lack effective gas venting channels, preventing the timely discharge of gases and volatiles generated during sintering, leading to gas accumulation between the gasket and the workpiece, further deteriorating the uniformity of pressure distribution. The sealing performance of traditional gaskets relies on simple planar contact, requiring extremely high flatness of the mating surfaces, making it difficult to guarantee ideal sealing effects in actual production. The lack of precise positioning mechanisms in existing technologies makes the gaskets prone to displacement during installation and use, affecting the repeatability of sintering quality. These technical defects severely restrict the development of sheet copper strip sintering process, leading to problems such as unstable product quality, low production efficiency and serious material waste. Utility Model Content

[0003] In view of this, the present invention provides a microporous pressure equalizing pad for sheet copper strip sintering structure, which can solve the technical problems of uneven pressure distribution leading to unstable sintering quality and poor product consistency in the existing sheet copper strip sintering process.

[0004] This utility model is implemented as follows: This utility model provides a microporous pressure equalizing gasket for sheet-type copper strip sintering structures, comprising: a main gasket, a central pressure equalizing ring, an outer peripheral fixing ring, a flow guiding channel, a connecting bridge, and a sealing flange; the main gasket is annular in shape, with a central through hole at its geometric center, and the central pressure equalizing ring is embedded in the central through hole, with its outer peripheral wall fitting against the inner peripheral wall of the main gasket; the outer peripheral fixing ring is arranged around the outer peripheral edge of the main gasket, and is fixedly connected to the main gasket through at least 6 circumferentially distributed bolt holes; the flow guiding channel extends through... The flow channels are spirally distributed within the radial cross-section of the main gasket, with an inner diameter of 0.1 mm to 2.0 mm, passing through the upper and lower surfaces of the main gasket. The connecting bridge is located between the main gasket and the central equalizing ring, and is radially distributed. One end of the connecting bridge is fixedly connected to the inner peripheral wall of the main gasket, and the other end is fixedly connected to the outer peripheral wall of the central equalizing ring. The sealing flange is located on the upper and lower surfaces of the main gasket, and is a concentric annular protrusion with a height of 0.05 mm to 0.5 mm.

[0005] The technical advantages of the microporous pressure equalizing gasket for sheet copper strip sintering structures provided by this utility model are as follows: By setting up an overall structure consisting of a main gasket, a central pressure equalizing ring, an outer peripheral fixing ring, a flow guiding channel, connecting bridges, and a sealing flange, uniform pressure distribution and precise control are achieved during the sheet copper strip sintering process. The annular structure of the main gasket provides a stable support foundation; the central pressure equalizing ring ensures effective pressure transmission in the central area through embedded connections; the spiral distribution of the flow guiding channel enables smooth discharge of gas and liquid; the radial layout of the connecting bridges enhances the mechanical strength of the overall structure; and the concentric ring design of the sealing flange ensures reliable sealing performance, thereby improving the overall stability and uniformity of the sheet copper strip sintering process.

[0006] Based on the above technical solution, the microporous pressure equalizing pad for the sintered copper strip structure of this utility model can be further improved as follows: The main gasket is made of sintered copper powder and has a thickness of 2 mm to 15 mm; the central equalizing ring is made of bronze and has an inner diameter to outer diameter ratio of 0.3 to 0.7; the outer peripheral fixing ring is made of brass and has a width of 0.05 to 0.15 times the outer diameter of the main gasket.

[0007] The beneficial effects of adopting the above-mentioned improved scheme are as follows: By using sintered copper powder to make the main gasket, bronze material to make the central equalizing ring, and brass material to make the outer peripheral fixing ring, the excellent performance characteristics of different copper-based materials are fully utilized. Sintered copper powder has good porosity and thermal conductivity, bronze material has excellent wear resistance and mechanical strength, and brass material has good processing performance and corrosion resistance. By strictly controlling the dimensional proportions of each component, the coordinated cooperation between the components is ensured, improving the service life and operational reliability of the overall structure, while optimizing pressure transmission efficiency and heat distribution uniformity.

[0008] Furthermore, the flow guiding channel includes main flow holes and branch flow guiding holes; the main flow holes are arranged along the radial direction of the main body gasket, and the number of main flow holes is 12 to 24, and the main flow holes are distributed at equal angles; the branch flow guiding holes intersect the main flow holes perpendicularly, and the length of the branch flow guiding holes is 0.2 to 0.8 times the length of the main flow holes, and each main flow hole connects to 2 to 4 branch flow guiding holes.

[0009] The beneficial effects of adopting the above-mentioned improved scheme are as follows: By setting up a composite flow channel system consisting of main flow holes and branch flow holes, efficient removal of gases and volatiles generated during sintering is achieved. The uniform angular distribution of the main flow holes in the radial direction ensures the uniformity of pressure release, while the perpendicular intersection design of the branch flow holes with the main flow holes increases the path selection of fluid flow and improves exhaust efficiency. By strictly controlling the length ratio and connection number of the branch flow holes and the main flow holes, the flow resistance is optimized, avoiding local pressure accumulation and significantly improving the pressure equalization effect and product quality consistency during the sintering process.

[0010] Furthermore, the connecting bridge has a wedge-shaped structure, and the thickness of the connecting bridge gradually decreases in the radial direction; the number of connecting bridges is 8 to 16, and the included angle between adjacent connecting bridges is 22.5 degrees to 45 degrees; the root width of the connecting bridge is 2 mm to 8 mm, and the end width of the connecting bridge is 1 mm to 4 mm.

[0011] The beneficial effects of adopting the above-mentioned improved scheme are as follows: By using a wedge-shaped connecting bridge design, a gradual transition in stress distribution and an effective improvement in structural strength are achieved. The gradual reduction in the thickness of the connecting bridge along the radial direction conforms to the natural laws of stress transfer, reducing the occurrence of stress concentration. By precisely controlling the number, angle distribution, and width dimensions at the root and ends of the connecting bridges, uniform load transfer and optimized configuration of structural stiffness are achieved. The use of the wedge structure not only improves connection strength but also reduces material usage, enhancing the overall structure's economy and reliability, and ensuring stable performance during long-term use.

[0012] Furthermore, the sealing flange includes an inner sealing flange and an outer sealing flange; the inner sealing flange is located in the region of the main gasket near the central equalizing ring, and the outer sealing flange is located in the region of the main gasket near the outer peripheral fixing ring; the radial distance between the inner sealing flange and the outer sealing flange is 0.4 to 0.6 times the radius of the main gasket.

[0013] The beneficial effects of adopting the above-mentioned improved scheme are as follows: By setting up a dual sealing structure with an inner sealing flange and an outer sealing flange, a significant improvement in sealing performance and reliability is achieved. The inner sealing flange is responsible for sealing the central area, while the outer sealing flange is responsible for sealing the outer peripheral area. Together, they form multiple sealing barriers, effectively preventing gas and liquid leakage during sintering. By strictly controlling the radial distance ratio between the inner and outer sealing flanges, a reasonable distribution of sealing pressure is ensured, avoiding over-compression or insufficient sealing. The dual sealing structure design improves adaptability to different working conditions, extends the service life of the gasket, and ensures the sealing reliability of the sintering process.

[0014] Furthermore, the upper and lower surfaces of the main body gasket are respectively provided with an upper positioning groove and a lower positioning groove; the upper positioning groove and the lower positioning groove are concentric rings, the depth of the upper positioning groove is 0.2 mm to 1.0 mm, and the depth of the lower positioning groove is 0.3 mm to 1.2 mm; the inner circumferential surface of the outer peripheral fixing ring is provided with positioning protrusions that cooperate with the upper positioning groove and the lower positioning groove.

[0015] The beneficial effects of the above-mentioned improved scheme are as follows: By setting positioning grooves on the upper and lower surfaces of the main gasket and setting matching positioning protrusions on the outer peripheral fixing ring, a precision positioning system is achieved, enabling accurate positioning and stable fixation of the gasket during installation. The concentric annular design of the upper and lower positioning grooves ensures the coaxiality accuracy of the gasket during installation, and accurate identification of the gasket's orientation is achieved by controlling the depth difference of the positioning grooves. The precise fit between the positioning protrusions and the positioning grooves eliminates positional deviations during installation, improving assembly efficiency and accuracy. This positioning system design effectively prevents displacement and rotation of the gasket during operation, ensuring the stability and repeatability of the sintering process.

[0016] Furthermore, the outer peripheral edge of the main gasket is provided with a wavy, uneven structure.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: By setting a wavy, uneven structure on the outer periphery of the main gasket, the fit and sealing effect between the gasket and the mating surface are significantly enhanced. The wavy structure can effectively compensate for minor unevenness of the mating surface, improving the uniform distribution of contact area and sealing pressure. This structural design also increases the flexibility of the gasket, enabling it to better adapt to dimensional changes caused by thermal expansion and contraction, reducing the impact of thermal stress on sealing performance, and improving the gasket's operational stability under different temperature conditions.

[0018] Furthermore, the inner circumferential surface of the central equalizing ring is provided with a serrated groove structure.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: By setting a serrated groove structure on the inner circumference of the central equalizing ring, the contact area and friction with the mating parts are effectively increased, thereby improving the reliability and stability of the connection. The serrated groove structure can achieve a small amount of elastic deformation, compensating for assembly errors and minor displacements during operation, and preventing loosening. This surface structure design also helps to disperse stress, avoid local stress concentration, extend service life, and ensure the performance stability of the central equalizing ring during long-term operation.

[0020] Furthermore, the surface of the connecting bridge is provided with a honeycomb microporous structure.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting a honeycomb microporous structure on the surface of the connecting bridge, effective weight reduction and significant improvement in thermal conductivity are achieved. The honeycomb microporous structure has excellent specific strength characteristics, reducing material usage and overall weight while maintaining sufficient mechanical strength. The microporous structure also increases the surface area, improves heat exchange efficiency, facilitates uniform temperature distribution and rapid heat transfer during sintering, improves sintering quality, and provides additional channels for gas flow, further optimizing the uniformity of pressure distribution.

[0022] Furthermore, the wavelength of the wavy concave-convex structure is 5 mm to 20 mm, the tooth pitch of the sawtooth groove structure is 1 mm to 5 mm, and the pore size of the honeycomb microporous structure is 0.05 mm to 0.3 mm.

[0023] The beneficial effects of adopting the above-mentioned improved scheme are as follows: By precisely controlling key dimensional parameters such as the wavelength of the wavy concave-convex structure, the tooth pitch of the sawtooth groove structure, and the pore size of the honeycomb microporous structure, the optimal configuration of various surface structure functions is achieved. A reasonable wavelength ensures a balance between sealing effect and material strength; an appropriate tooth pitch guarantees coordination between friction and processing accuracy; and precise micropore size achieves a balance between weight reduction and structural strength. The coordinated operation of these dimensional parameters ensures the maximum performance of the gasket, improves product consistency and reliability, and provides flexible adaptability for different application scenarios.

[0024] Compared with existing technologies, the beneficial effects of this utility model's microporous pressure equalizing gasket for sheet copper strip sintering structures are as follows: This utility model, through innovative multi-layered structural design and precise geometric configuration, completely solves the fundamental problem of uneven pressure distribution during the traditional sheet copper strip sintering process. The annular structure of the main gasket, combined with the embedded design of the central pressure equalizing ring, ensures uniform pressure transmission from the center to the outer periphery, eliminating the defect of insufficient pressure in the central area of ​​traditional gaskets. The innovative application of the spiral flow channel system achieves efficient removal of gases and volatiles during sintering, avoiding localized pressure anomalies caused by gas accumulation. The wedge-shaped structure design of the radial connecting bridges not only improves the overall mechanical strength but also achieves a gradient distribution of stress, significantly reducing the risk of stress concentration. The double-sealing flange system, combined with a precision positioning structure, ensures accurate installation and reliable sealing of the gasket, improving the repeatability and stability of the sintering process. The synergistic effect of various surface structures such as corrugated, sawtooth, and honeycomb further optimizes contact performance and thermal conductivity characteristics. The overall technical solution achieves precise control of sintering pressure, uniformity of temperature distribution, and consistent improvement in product quality, providing a technological breakthrough for the sintering process of sheet copper strips. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a microporous pressure equalizing pad for a sheet-type copper strip sintered structure; Figure 2 This is a transverse cross-sectional view of a microporous pressure equalizing pad for a sheet-type copper strip sintered structure; Figure 3 This is a longitudinal cross-sectional view of a microporous pressure equalizing pad for a sheet-type copper strip sintered structure; The attached diagram lists the components represented by each number as follows: 1. Main gasket; 2. Central equalizing ring; 3. Outer peripheral fixing ring; 4. Flow guiding channel; 41. Main flow guiding hole; 42. Branch flow guiding hole; 5. Connecting bridge. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0028] like Figures 1-3The image shows a first embodiment of a microporous pressure equalizing gasket for a sheet-type copper strip sintering structure provided by this utility model. In this embodiment, it includes: a main gasket 1, a central pressure equalizing ring 2, an outer peripheral fixing ring 3, a flow guiding channel 4, a connecting bridge 5, and a sealing flange. The main gasket 1 is annular in shape, with a central through hole at its geometric center. The central pressure equalizing ring 2 is embedded in the central through hole, and the outer peripheral wall of the central pressure equalizing ring 2 is in contact with the inner peripheral wall of the main gasket 1. The outer peripheral fixing ring 3 is arranged around the outer peripheral edge of the main gasket 1 and is fixedly connected to the main gasket 1 through at least 6 circumferentially distributed bolt holes. The flow channel 4 runs through the upper and lower surfaces of the main gasket 1. The flow channel 4 is spirally distributed in the radial section of the main gasket 1. The inner diameter of the flow channel 4 is 0.1 mm to 2.0 mm. The connecting bridge 5 is located between the main gasket 1 and the central equalizing ring 2. The connecting bridge 5 is radially distributed. One end of the connecting bridge 5 is fixedly connected to the inner peripheral wall of the main gasket 1, and the other end of the connecting bridge 5 is fixedly connected to the outer peripheral wall of the central equalizing ring 2. The sealing flange is located on the upper and lower surfaces of the main gasket 1. The sealing flange is a concentric ring protrusion. The height of the sealing flange is 0.05 mm to 0.5 mm.

[0029] In the above technical solution, the main gasket 1 is made of sintered copper powder, and the thickness of the main gasket 1 is 2 mm to 15 mm; the central equalizing ring 2 is made of bronze, and the ratio of the inner diameter to the outer diameter of the central equalizing ring 2 is 0.3 to 0.7; the outer peripheral fixing ring 3 is made of brass, and the width of the outer peripheral fixing ring 3 is 0.05 to 0.15 times the outer diameter of the main gasket 1.

[0030] Furthermore, in the above technical solution, the flow channel 4 includes a main flow hole and branch flow holes 42; the main flow holes are arranged along the radial direction of the main body gasket 1, and the number of main flow holes is 12 to 24, and the main flow holes are distributed at equal angles; the branch flow holes 42 intersect the main flow holes perpendicularly, and the length of the branch flow holes 42 is 0.2 to 0.8 times the length of the main flow holes, and each main flow hole connects to 2 to 4 branch flow holes 42.

[0031] Furthermore, in the above technical solution, the connecting bridge 5 has a wedge-shaped structure, and the thickness of the connecting bridge 5 gradually decreases in the radial direction; the number of connecting bridges 5 is 8 to 16, and the included angle between adjacent connecting bridges 5 is 22.5 degrees to 45 degrees; the root width of the connecting bridge 5 is 2 mm to 8 mm, and the end width of the connecting bridge 5 is 1 mm to 4 mm.

[0032] Furthermore, in the above technical solution, the sealing flange includes an inner sealing flange and an outer sealing flange; the inner sealing flange is located in the area of ​​the main gasket 1 near the central equalizing ring 2, and the outer sealing flange is located in the area of ​​the main gasket 1 near the outer peripheral fixing ring 3; the radial distance between the inner sealing flange and the outer sealing flange is 0.4 to 0.6 times the radius of the main gasket 1.

[0033] Furthermore, in the above technical solution, the upper and lower surfaces of the main body gasket 1 are respectively provided with an upper positioning groove and a lower positioning groove; the upper positioning groove and the lower positioning groove are concentric rings, the depth of the upper positioning groove is 0.2 mm to 1.0 mm, and the depth of the lower positioning groove is 0.3 mm to 1.2 mm; the inner circumferential surface of the outer peripheral fixing ring 3 is provided with positioning protrusions that cooperate with the upper positioning groove and the lower positioning groove.

[0034] Furthermore, in the above technical solution, the outer peripheral edge of the main gasket 1 is provided with a wavy concave-convex structure.

[0035] Furthermore, in the above technical solution, the inner circumferential surface of the central equalizing ring 2 is provided with a sawtooth groove structure.

[0036] Furthermore, in the above technical solution, the surface of the connecting bridge 5 is provided with a honeycomb microporous structure.

[0037] Furthermore, in the above technical solution, the wavelength of the wavy concave-convex structure is 5 mm to 20 mm, the tooth pitch of the sawtooth groove structure is 1 mm to 5 mm, and the pore size of the honeycomb microporous structure is 0.05 mm to 0.3 mm.

[0038] The following is a specific embodiment 1 of this utility model: The microporous pressure equalizing gasket for the sintered copper strip structure in this embodiment is manufactured using a high-precision machining process. The main gasket has an outer diameter of 120 mm, an inner diameter of 40 mm, and a thickness of 8 mm. It is made of atomized copper powder and sintered at 500 degrees Celsius, possessing a porosity of 30% and excellent thermal conductivity. The central pressure equalizing ring is made of tin bronze, with an outer diameter of 39.8 mm, an inner diameter of 20 mm, and a thickness of 8 mm. Its surface is precision ground, and the clearance between it and the main gasket is controlled within 0.02 mm. The outer peripheral fixing ring is made of H62 brass, with an inner diameter of 121 mm, an outer diameter of 135 mm, and a thickness of 10 mm. It is reliably connected to the main gasket by 12 M6 bolts. The bolts are made of stainless steel and have a galvanized surface to improve corrosion resistance. The flow guiding channel system includes 18 main flow holes, each with a diameter of 1.5 mm, evenly distributed radially at 20-degree intervals. Each main flow hole connects to 3 branch flow holes, each with a diameter of 0.8 mm and a length 0.5 times that of the main flow hole. The connecting bridges employ a wedge-shaped cross-section design, numbering 12, at 30-degree intervals, with a root width of 5 mm, an end width of 2.5 mm, and a thickness linearly decreasing from 3 mm to 1.5 mm radially. The sealing flanges consist of inner and outer rings. The inner sealing flange is located on the circumference 25 mm from the center, and the outer sealing flange is located on the circumference 55 mm from the center. Both are 0.3 mm high and 2 mm wide, with a trapezoidal cross-section to improve sealing performance. The positioning groove system includes two concentric annular grooves. The upper positioning groove is 0.5 mm deep and 3 mm wide, and the lower positioning groove is 0.8 mm deep and 4 mm wide. The groove bottoms are rounded to reduce stress concentration. The wavy, concave-convex structure has a wavelength of 12 mm and a wave height of 1.5 mm, with a total of 10 complete waveforms. The sawtooth groove structure has a tooth pitch of 3 mm and a tooth depth of 0.8 mm, with the tooth shape adopting an isosceles triangular design. The honeycomb microporous structure has a pore diameter of 0.2 mm and a pore depth of 2 mm, arranged in a regular hexagonal pattern. The entire gasket operates within a temperature range of room temperature to 800 degrees Celsius and a pressure range of 1 MPa to 50 MPa, suitable for various specifications of sheet copper strip sintering processes. In practical applications, this gasket ensures uniform distribution of sintering pressure, with pressure deviation controlled within ±2%, significantly improving the quality consistency and production efficiency of sintered products. The flow channel system can complete gas venting within 30 seconds, avoiding the impact of gas accumulation on sintering quality. The double sealing system maintains good sealing performance throughout the entire operating temperature and pressure range, with a leakage rate of less than 0.01%. The surface microstructure design improves the fit between the gasket and the mating surface by 40%, extending the service life to over 5000 sintering cycles.

[0039] The following is another specific embodiment 2 of this utility model: Embodiment 2 is an improved design based on Embodiment 1, specifically for the sintering requirements of large-size sheet copper strips. The outer diameter of the main gasket is increased to 200 mm, the inner diameter to 60 mm, and the thickness remains unchanged at 8 mm, to accommodate the sintering requirements of larger workpieces. Correspondingly, the outer diameter of the central equalizing ring is adjusted to 59.8 mm, and the inner diameter is increased to 35 mm, maintaining a precise fit with the main gasket. The inner diameter of the outer peripheral fixing ring is adjusted to 201 mm, the outer diameter is increased to 220 mm, and the number of bolts is increased to 18, using M8 specifications to bear greater loads. The flow channel system is correspondingly expanded, with the number of main flow holes increased to 24, the angle interval adjusted to 15 degrees, and the number of branch flow holes for each main flow hole increased to 4, to accommodate the gas removal requirements of a larger area. The number of connecting bridges is increased to 16, the angle interval is adjusted to 22.5 degrees, the root width is increased to 7 mm, and the end width is increased to 3.5 mm, to bear greater load transfer tasks. The distribution radius of the sealing flanges has been adjusted accordingly. The inner sealing flange is located on a circumference 40 mm from the center, and the outer sealing flange is located on a circumference 85 mm from the center. The height has been increased to 0.4 mm to accommodate greater sealing pressure. The wavelength of the wavy concave-convex structure has been adjusted to 15 mm, the wave height has been increased to 2 mm, and the number of complete waveforms has been increased to 13. This improved design maintains the original technical advantages while expanding its applicability, meeting the high-quality sintering requirements of large-size sheet copper strips, and further improving pressure uniformity and sealing performance.

[0040] The following is another specific embodiment 3 of this utility model: This embodiment 3 is based on embodiment 1, and is specifically designed for high-temperature resistant strengthening in response to high-temperature sintering processes. The main gasket is made of molybdenum-copper composite powder sintering, with a molybdenum content of 15%, which significantly improves high-temperature strength and thermal stability, extending the upper limit of the working temperature to 1200 degrees Celsius. The central equalizing ring is made of beryllium bronze, which has excellent high-temperature mechanical properties and thermal conductivity, and can maintain stable dimensional accuracy in high-temperature environments. The outer peripheral fixing ring is made of nickel-based alloy, the bolts are replaced with high-temperature alloy materials, and the surface is treated with a ceramic coating to improve oxidation resistance. The inner surface of the flow channel undergoes a special high-temperature oxidation-resistant treatment to ensure that the channel will not be blocked due to oxidation in high-temperature environments. The surface of the connecting bridge is nitrided to improve surface hardness and wear resistance. The honeycomb microporous structure is made using laser processing technology, with smooth pore walls and strong resistance to high-temperature deformation. The material composition of the sealing flange has been optimized and adjusted, and high-temperature resistant additives have been added to ensure that it can still maintain good elasticity and sealing performance in high-temperature environments. The entire gasket undergoes a vacuum heat treatment process to eliminate internal stress and improve dimensional stability. This reinforced design enables the gasket to operate stably at high temperatures of 1200 degrees Celsius, providing a reliable technical guarantee for the sheet sintering of special alloy materials and meeting the stringent requirements of high-end application fields such as aerospace and nuclear industry.

[0041] Specifically, the principle of this invention is as follows: This invention employs a layered, progressive pressure transmission principle and a multi-channel collaborative working mechanism to achieve uniform pressure distribution. The annular structure of the main gasket serves as the basic platform for pressure transmission, and its geometry conforms to the mechanical requirements of uniform pressure distribution. The central equalizing ring forms an integrated structure with the main gasket through an embedded connection, utilizing the high strength characteristics of bronze to undertake the pressure transmission task in the central area, ensuring uniform pressure diffusion from the application point to the entire contact surface. The radial connecting bridge adopts a wedge-shaped structure design, following the principle of stress gradient distribution, to achieve a smooth load transition and effectively avoid stress concentration. Its geometry has been precisely calculated to ensure the optimization of the stress transmission path. The spiral flow guiding channel system is designed based on fluid mechanics principles. The main flow orifice is responsible for guiding the main fluid, while the branch flow orifices form an auxiliary flow network. The two work together to achieve efficient gas and liquid removal, eliminating the root cause of abnormal pressure. The double sealing flange system adopts a stepped sealing principle, with the inner and outer sealing flanges undertaking the sealing tasks of different areas, forming multiple sealing barriers. Their height and distribution have been precisely designed to ensure a reasonable distribution of sealing pressure. The surface microstructure design is based on the principles of contact mechanics and tribology. Wavy structures increase flexibility, serrated structures enhance friction, and honeycomb structures achieve a balance between weight reduction and reinforcement. The coordinated operation of these structures optimizes contact performance comprehensively. The overall technical principle, through the organic combination of geometric design, material property matching, and the application of mechanical principles, fundamentally solves the technical challenge of uneven pressure distribution.

[0042] The specific operation or use method of this utility model is as follows: First, a pre-inspection and preparation of the gasket is performed, checking whether the surface of the main gasket is flat, whether the central equalizing ring is tightly fitted with the central through hole, whether the outer peripheral fixing ring is firmly connected, whether the flow channel is unobstructed, whether the connecting bridge is intact and without cracks, and whether the sealing flange protrudes evenly. Then, the gasket is placed on the lower pressure plate of the sintering equipment, ensuring that the geometric center of the gasket coincides with the axis of the equipment, and precise positioning is achieved by using the positioning groove and the positioning protrusion of the equipment. Next, the sheet copper strip workpiece to be sintered is placed flat on the upper surface of the gasket, ensuring that the workpiece coverage area is evenly distributed on the working surface of the main gasket to avoid local concentrated loads. The sintering equipment is started, and the pressure is slowly applied to the predetermined value. During the pressure application process, the pressure is transmitted to the sealing flange through the upper pressure plate, and then diffuses to the central equalizing ring and the outer peripheral fixing ring through the main gasket. The connecting bridge ensures the uniform transmission of pressure, and the flow channel starts working at the same time to remove gas and moisture from the surface of the workpiece. During the sintering process, the uniformity of the pressure distribution is continuously monitored, and the pressure is finely adjusted as necessary to ensure that the entire workpiece is under uniform pressure. After sintering, slowly release the pressure to avoid sudden pressure release causing impact on the workpiece. Remove the sintered workpiece, check the condition of the gaskets, clean any residue in the flow channels, and inspect all components for wear or deformation. Regularly maintain the gaskets, including cleaning the surface microstructure, checking the tightness of connections, and replacing severely worn parts to ensure the gaskets are always in good working condition.

Claims

1. A microporous pressure equalizing pad for a sheet-type copper strip sintered structure, characterized in that, include: The system comprises a main gasket, a central equalizing ring, an outer peripheral fixing ring, a flow guiding channel, a connecting bridge, and a sealing flange. The main gasket is annular in shape, with a central through-hole at its geometric center. The central equalizing ring is embedded within this through-hole, and its outer peripheral wall is fitted against the inner peripheral wall of the main gasket. The outer peripheral fixing ring surrounds the outer peripheral edge of the main gasket and is fixedly connected to it via at least six circumferentially distributed bolt holes. The flow guiding channel extends through the upper and lower surfaces of the main gasket. The flow channels are spirally distributed within the radial cross-section of the main gasket, with an inner diameter of 0.1 mm to 2.0 mm. The connecting bridges are located between the main gasket and the central equalizing ring, and are radially distributed. One end of the connecting bridge is fixedly connected to the inner peripheral wall of the main gasket, and the other end is fixedly connected to the outer peripheral wall of the central equalizing ring. The sealing flanges are located on the upper and lower surfaces of the main gasket, and are concentric annular protrusions with a height of 0.05 mm to 0.5 mm.

2. The microporous pressure equalizing pad for a sheet-type copper strip sintered structure according to claim 1, characterized in that, The main gasket is made of sintered copper powder and has a thickness of 2 mm to 15 mm. The central equalizing ring is made of bronze and has an inner diameter to outer diameter ratio of 0.3 to 0.

7. The outer peripheral fixing ring is made of brass and has a width of 0.05 to 0.15 times the outer diameter of the main gasket.

3. The microporous pressure equalizing pad for a sheet-type copper strip sintered structure according to claim 2, characterized in that, The flow guiding channel includes a main flow guide hole and branch flow guide holes; The main flow holes are arranged along the radial direction of the main body gasket, and the number of main flow holes is 12 to 24. The main flow holes are distributed at equal angles. The branch flow holes intersect the main flow holes perpendicularly, and the length of the branch flow holes is 0.2 to 0.8 times the length of the main flow holes. Each main flow hole connects to 2 to 4 branch flow holes.

4. The microporous pressure equalizing pad for a sheet-type copper strip sintered structure according to claim 3, characterized in that, The connecting bridge has a wedge-shaped structure, and the thickness of the connecting bridge gradually decreases in the radial direction; the number of connecting bridges is 8 to 16, and the included angle between adjacent connecting bridges is 22.5 degrees to 45 degrees; the root width of the connecting bridge is 2 mm to 8 mm, and the end width of the connecting bridge is 1 mm to 4 mm.

5. A microporous pressure equalizing pad for a sheet-type copper strip sintered structure according to claim 4, characterized in that, The sealing flange includes an inner sealing flange and an outer sealing flange; the inner sealing flange is located in the area of ​​the main gasket near the central equalizing ring, and the outer sealing flange is located in the area of ​​the main gasket near the outer peripheral fixing ring; the radial distance between the inner sealing flange and the outer sealing flange is 0.4 to 0.6 times the radius of the main gasket.

6. A microporous pressure equalizing pad for a sheet copper strip sintered structure according to claim 5, characterized in that, The upper and lower surfaces of the main gasket are respectively provided with an upper positioning groove and a lower positioning groove; the upper positioning groove and the lower positioning groove are concentric rings, the depth of the upper positioning groove is 0.2 mm to 1.0 mm, and the depth of the lower positioning groove is 0.3 mm to 1.2 mm; the inner circumferential surface of the outer peripheral fixing ring is provided with positioning protrusions that cooperate with the upper positioning groove and the lower positioning groove.

7. A microporous pressure equalizing pad for a sheet copper strip sintered structure according to claim 6, characterized in that, The outer periphery of the main gasket has a wavy, concave-convex structure.

8. A microporous pressure equalizing pad for a sheet-type copper strip sintered structure according to claim 7, characterized in that, The inner circumferential surface of the central equalizing ring is provided with a sawtooth groove structure.

9. A microporous pressure equalizing pad for a sheet-type copper strip sintered structure according to claim 8, characterized in that, The surface of the connecting bridge is provided with a honeycomb microporous structure.

10. A microporous pressure equalizing pad for a sheet copper strip sintered structure according to claim 9, characterized in that, The wavelength of the wavy concave-convex structure is 5 mm to 20 mm, the tooth pitch of the sawtooth groove structure is 1 mm to 5 mm, and the pore size of the honeycomb microporous structure is 0.05 mm to 0.3 mm.

Images