2368results about "Soldering apparatus" patented technology

The invention relates to the technical field of data processing, and discloses a method and system for monitoring the running state of reflow soldering equipment. The method comprises the steps of collecting data through a multi-point sensor, extracting temperature gradient, tension fluctuation and gas concentration characteristics, constructing a state recognition model, calculating a health index and setting an early warning threshold value, constructing a fault precursor extraction model to predict a future state, and finally establishing a maintenance strategy optimization system and generating an equipment maintenance plan based on fault early warning information. Through multi-dimensional data fusion and intelligent analysis, early accurate identification of the abnormal state of the equipment, accurate prediction of the fault development trend and active maintenance decision based on quality influence and cost optimization are realized, so that the welding quality stability is improved, the non-planned downtime is shortened, and the maintenance cost is reduced.

A component includes a body having a coupon opening defined therein, and an additively manufactured (AM) metal coupon including a dense region, a porous region adjacent the dense region, and a coupon outer surface. The porous region has a first cross-sectional area at a first location at or near the coupon outer surface and a second cross-sectional area less than the first cross-sectional area at a second location distal from the coupon outer surface. A braze material couples the metal coupon in the coupon opening and infiltrates into the porous region, e.g., based at least on a characteristic of the porosity thereof. The dense region may have a third cross-sectional area at the first location and a fourth cross-sectional area greater than the third cross-sectional area at the second location so it can direct the braze material in the porous region toward an inner surface of the coupon opening.

A metal coupon (200) for repairing a component (202) includes an additively manufactured (AM) metal member (210) having at least two porous regions (300) and a braze material infiltration barrier (304) positioned between the at least two porous regions (300). The braze material infiltration barrier (304) has a lower porosity than the at least two porous regions (300). A component (202) using the metal coupon (200) may also include a braze material (310) coupling the metal coupon (200) in a coupon opening (204) in the body (206). The braze material (310) infiltrates at least one of the two porous regions (300), and the braze material infiltration barrier (304) separates the braze material (310) in the at least one of the two porous regions (300) from at least one other of the at least two porous regions (300). Different braze materials may be used in each porous region.

An additive manufactured (AM) metal coupon for a turbomachine component is provided. The component includes an airfoil body having a pressure side, a suction side, a trailing edge, and a coupon opening. The AM metal coupon has an AM metal member with at least one slanted coupon side wall at an angle of less than 90° with an exterior surface of the AM metal member. The AM metal member also has a first porous region having a first porosity and a second porous region having a second porosity different than the first porosity. A braze material couples the AM metal coupon in the coupon opening in the airfoil body and infiltrates into at least one of the first porous region based at least on a characteristic of the first porosity and the second porous region based at least on a characteristic of the second porosity.

A metal coupon includes an additively manufactured (AM) metal member having a porous region having between 2% to 50% open space volume to total volume. The metal coupon includes a first section of an anchor configured to interact with a second section of the anchor in a coupon opening of a body of a component. A component including the metal coupon may include the body including the coupon opening, and an anchor including a first section in or on one of the AM metal coupon and the body and a second section in or on the other of the AM metal coupon and the body. At least the first and second sections cooperatively hold the AM metal coupon in the coupon opening in the body. Braze material couples the coupon in the coupon opening in the body. The braze material infiltrates into the porous region.

A metal coupon for repairing a component includes an additively manufactured (AM) metal member having a conduit in an interior of the AM metal member, and a first porous region around the conduit. The conduit is hollow. The porous metal coupon with conduit allows a braze material to be directed based on characteristics of the first porous region. A second porous region may be provided inside the conduit to increase heat rejection of the conduit.

The present disclosure relates to a method of using a metal specimen block having a porous region for a component. A method of coupling a metal sample block (200) to a component (202) may include additive manufacturing a metal sample block (200) having a first porous region (300A) having a first porosity and a second porous region (300B) having a second porosity different from the first porosity. A metal specimen block (200) is positioned in a specimen block opening (204) in a body (206) of the component (202). The metallic sample block (200) may be infiltrated with a braze material (310) to couple the metallic sample block (200) in a sample block opening (204) in the body (206). The one or more brazing materials (310) are infiltrated into at least one of the first porous region (300A) and the second porous region (300B) based at least on a characteristic of the first porosity and at least on a characteristic of the second porosity. The cured braze material (310) includes different segments having different physical properties based on different porosities and / or different braze materials.

A component includes a dense base region, a dense replacement region and an additively manufactured (AM) porous region between the dense base region and the dense replacement region. The porous region has a porosity between 2% to 50% open space volume to total volume of the AM porous region. The porous region can be printed onto the base region or the replacement region. A braze material couples the base region, the porous region and the replacement region together, and infiltrates into the porous region based at least on a characteristic of the porosity. The porous region reduces stress at a joint between the dense regions and can be customized to create different physical characteristic(s) than just those of the base and replacement regions.

A component (202) is disclosed that includes a body (206) and an additive manufactured (AM) metal mass (200) that includes a first section (292) and a stress relief section (294). The stress relief section (294) includes a porous region (300) having a porosity in which an open spatial volume accounts for 2% to 50% of the total volume of the stress relief section (294). The stress relief section (294) has a smaller at least one of thermal conductivity, tensile strength, ductility, and fatigue strength than the first section (292). A braze material (310) couples the AM metal specimen block (200) to a specimen block opening (204) in the body (206). The stress relief section (294) creates a low stress zone in the metal specimen block (200), which can be located near or adjacent to a high stress zone. The stress relief section (294) reduces residual stress in the metal sample block (200), which reduces related challenges to couple the metal sample block (200) to the body (206) of the component (202), particularly in the case of the use of superalloy materials.

A metal coupon (200) for repairing a component (202) includes an additively manufactured (AM) metal member (330) having a sealed cavity (296) in an interior of the AM metal member (330), and a porous region (300) around the sealed cavity (296). A metal coupon system (210) may include at least two AM metal parts (292) with each AM metal part (292) including at least a section (294) of a sealed cavity (296) therein and a porous region (300) around the at least a section (294) of the sealed cavity (296). The AM metal parts (292) combine to form the metal coupon (200), i.e., AM metal member (330), with the sealed cavity (296) in an interior thereof and the porous region (300) around the sealed cavity (296). In any event, the sealed cavity (296) is hollow. The porous metal coupon (300) with sealed cavity (296) provides reduced mass and allows braze material (310) to be directed based on characteristics of the porous region (300).

An additive manufactured (AM) metal coupon (200) for a turbomachine component (202) is provided. The component (202) includes an airfoil body (206) having a pressure side (152, 178), a suction side (154, 180), a trailing edge (158, 184), and a coupon opening (204). The AM metal coupon (200) has an AM metal member (290) with at least one slanted coupon side wall (292, 294) at an angle of less than 90° with an exterior surface (296) of the AM metal member (290). The AM metal member (290) also has a first porous region (300A) having a first porosity and a second porous region (300B) having a second porosity different than the first porosity. A braze material (310) couples the AM metal coupon (200) in the coupon opening (204) in the airfoil body (206) and infiltrates into at least one of the first porous region (300A) based at least on a characteristic of the first porosity and the second porous region (300B) based at least on a characteristic of the second porosity.

The invention relates to a porous metal sample block with a pipeline for repairing a component, the component with the porous metal sample block and a related method. A metal sample block (200) for repairing a component (202) includes an additive manufactured (AM) metal component (330) having a conduit (296) inside the AM metal component (330) and a first porous region (300) surrounding the conduit (296). The duct (296) is hollow. A porous metal sample block (200) with conduits (296) allows the brazing material (310) to be directed based on characteristics of the first porous region (300). The second porous region (350) can be disposed within the conduit (296) to increase heat dissipation of the conduit (296).

A component including a body, and an additively manufactured (AM) metal coupon including a first section and a stress-relief section, is disclosed. The stress-relief section includes a porous region having a porosity between 2% to 50% open space volume to total volume of the stress-relief section. The stress-relief section has at least one of thermal conductivity, tensile strength, ductility, or fatigue strength less than first section. A braze material couples the AM metal coupon to a coupon opening in the body. The stress-relief section creates a low-stress zone in the metal coupon that can be located near or adjacent to a high-stress zone. The stress-relief section reduces residual stress in the metal coupon, which reduces the related challenges of coupling the metal coupon to the body of the component, especially where superalloy materials are used.

A metal coupon for repairing a component includes an additively manufactured (AM) metal member having at least two porous regions and a braze material infiltration barrier positioned between the at least two porous regions. The braze material infiltration barrier has a lower porosity than the at least two porous regions. A component using the metal coupon may also include a braze material coupling the metal coupon in a coupon opening in the body. The braze material infiltrates at least one of the two porous regions, and the braze material infiltration barrier separates the braze material in the at least one of the two porous regions from at least one other of the at least two porous regions. Different braze materials may be used in each porous region.

A semiconductor device includes semiconductor elements and conductors. The conductors include a first upper conductor connected to an upper electrode of the first semiconductor element through a first upper solder, a first lower conductor connected to a lower electrode of the first semiconductor element through a first lower solder, a second upper conductor connected to an upper electrode of the second semiconductor element through a second upper solder, a second lower conductor connected to a lower electrode of the second semiconductor element through a second lower solder, and a joint conductor connecting the first upper conductor and the second lower conductor through a relay solder. Each solder contains Cu and Sn. Each solder connection target has an Ni layer. A grain size of at least one of the first upper solder, second upper solder, or relay solder is smaller than a grain size of the first and second lower solders.

The invention discloses an automatic deviation correction system and a deviation correction method for the weld of a brazed and cut part, comprising: calibrating a camera; calibrating a laser sensor; image acquisition and weld detection; feature point extraction and weld positioning; contour line fitting; extraction of the weld center axis; and weld trajectory planning. The beneficial effect is that the automatic deviation correction system and the deviation correction method for the weld of a brazed and cut part, by capturing the original image and processing it through bilateral filtering, and then using the synergistic effect of a spatial distance weight function and a pixel value similarity weight function, effectively suppress the noise salt and pepper effect, sharpen the weld boundary features, and avoid boundary misjudgment caused by noise interference; boundary detection follows the convolution operation logic, and the horizontal and vertical convolution kernels interact deeply with the image matrix, thereby realizing quantized gradient amplitude and direction; by traversing the grayscale threshold combination and maximizing the between-class variance calculation, the image is binarized and the main contour of the weld is highlighted.

The invention discloses a preparation method of a vertical comb-driven MEMS (Micro Electro Mechanical System) micromirror, which comprises the following steps of: forming a through alignment mark and a pre-etched comb structure on a device layer by using a first composite mask, and forming the through alignment mark and the pre-etched comb structure on the back surface of the device layer on a first substrate through a composite mask process, after the first substrate and the second substrate are bonded, the self-alignment composite mask of the comb tooth structure is aligned with the back face pre-etched comb tooth structure through the through alignment mark, high-precision alignment of the comb tooth structure is achieved, accumulated errors are avoided, and the yield of device preparation is improved.

The invention provides a pressure sensor based on silicon-silicon bonding and a preparation method thereof. The preparation method comprises the following steps: providing a low-resistance silicon wafer, forming a silicon deep hole in a first surface of the low-resistance silicon wafer, and depositing an isolation material in the silicon deep hole to form an isolation ring; etching the first surface to form a shallow groove and a conductive silicon column to obtain a low-resistance cap wafer; providing an SOI wafer, performing ion implantation on the first surface of the SOI wafer to form a resistance region, and obtaining a substrate wafer; bonding the low-resistance cap wafer with the substrate wafer; grinding the second surface of the low-resistance cap wafer until the isolating ring is exposed; depositing an insulating layer on the second surface of the low-resistance cap wafer, and forming a metal electrode on the insulating layer; and forming a back cavity structure on the second surface of the substrate wafer, exposing the top silicon of the SOI wafer, and forming a sensitive film layer. The conductive silicon column is made of low-resistance silicon, copper ion pollution is avoided, the preparation process is simple, and the period is controllable; the device obtained based on the silicon-silicon bonding process has high bonding strength and high air tightness.

The invention discloses a ceramic-metal composite structure with a low thermal expansion coefficient and a middle layer for assisting two-step temperature control brazing and a preparation method of the ceramic-metal composite structure. The composite structure is formed by metallurgical bonding of a ceramic matrix, a titanium-containing active brazing filler metal layer, a low-thermal-expansion-coefficient (2 * 10 <-6 > / K-9 * 10 <-6 > / K) middle layer, a low-temperature brazing filler metal layer and metal base metal in sequence. During preparation, a step-by-step temperature control brazing process is adopted, wherein in the first step, ceramic / intermediate layer connection is achieved through titaniferous active brazing filler metal with the solidus larger than or equal to 780 DEG C under the vacuum condition smaller than or equal to 5 * 10 <-3 > Pa; and secondly, under the vacuum or inert atmosphere, brazing filler metal with the solidus being smaller than or equal to 650 DEG C is adopted for completing connection of the middle layer and the metal base metal. The low-stress and high-strength ceramic-metal composite structure is successfully constructed on the basis of the thermal matching design of the low-thermal-expansion-coefficient middle layer and the ceramic and the stress gradient release mechanism of the two-step temperature control brazing process in a cooperative coupling mode, and the low-stress and high-strength ceramic-metal composite structure is particularly suitable for the high-temperature and high-reliability fields of aerospace thermal protection systems, high-power electronic device packaging and the like.

The invention discloses a niobium-zirconium alloy and nickel-based alloy vacuum brazing process and a part, and belongs to the technical field of vacuum brazing. According to the process, a vacuum brazing furnace is adopted for brazing, and BNi-2 brazing filler metal is used; the process comprises the following steps that S1, a welding assembly structure formed by a niobium-zirconium alloy part and a nickel-based alloy part is assembled, and BNi-2 brazing filler metal is arranged at the matching position of the welding assembly structure; s2, staged heating is carried out on the welding assembly structure under the preset vacuum degree of the vacuum brazing furnace, and the staged heating comprises a foreign matter removing heating stage, a brazing filler metal solid diffusion heating stage and a brazing filler metal melting wetting heating stage which are sequentially carried out; and S3, staged cooling is conducted on the welded assembly structure after welding is completed, the staged cooling comprises a furnace cooling stage and a gas quenching cooling stage which are conducted in sequence, according to the scheme, defect control over the niobium-zirconium alloy and nickel-based alloy welding joint can be effectively achieved, and the strength and sealing performance of the welding joint are guaranteed.

This disclosure provides systems, methods, and apparatuses, including computer programs encoded on computer storage media, that provide for welding techniques for manufacturing robots, such multipass welding techniques for welding robots. For example, the welding techniques may enable generation of weld instructions based on a welding fill plan. The instructions may be generated based on a bead model or a table that indicates a wire feed speed, a travel speed, or a voltage. As another example, the techniques may enable generation of weld instructions based on the one or more dimensions of a seam. As another example, the techniques may enable generation of a joint model of a cross-section of a seam to be welded. The joint model may be generated based on a combination of a plurality of feature components to generate the joint model of the seam. Other aspects and features are also claimed and described.

The invention discloses a porous niobium interlayer assisted brazing method, and relates to a method for improving the brazing performance of a composite material or ceramic and metal. The method aims at solving the problems that a traditional porous middle layer is poor in performance, high residual stress of a composite material or ceramic and metal brazed joint is difficult to relieve, the toughness of the joint is poor, and the strengthening effect on the brazed joint is limited. The method mainly comprises the following steps: 1, pretreating a base material, a brazing filler metal and a porous niobium intermediate layer; and secondly, the base metal, the brazing filler metal and the porous niobium middle layer are assembled and placed in a vacuum furnace to be brazed, and a to-be-welded piece is obtained. The interface structure can be effectively improved, the plasticity, toughness and high-temperature mechanical property of a brazing seam are improved, the thermal expansion coefficient of the brazing seam is reduced, residual stress is released, the mechanical property of a composite material or ceramic and metal brazing joint is remarkably improved, and the high-temperature strength of the joint is guaranteed.

The invention relates to a method for mounting a MEMS micromirror unit (100) in a higher-level assembly (200) with at least one receptacle (210) for a MEMS micromirror unit (110), as is used, for example, in projection exposure systems (1) for photolithography. The invention further relates to a MEMS micromirror unit (100) advantageously designed for this purpose. The process is characterized by the following steps: a) Inserting the MEMS micromirror unit (100) into the receptacle (210); b) Aligning the MEMS micromirror unit (100) with the recording (210); c) Applying an axial tensile force to an interface element (120) of the MEMS micromirror unit greater than the subsequent preload force, resulting in a longitudinal elongation of the interface element (120); d) Attaching the prestressing element (300) to a predetermined longitudinal position on the interface element (120); and e) Reducing and removing the axial tensile force. At the latest during the reduction of the axial tensile force, the preload element (300) comes into contact with the receptacle (210) and prevents a complete reversal of the longitudinal strain of the interface element (120), thus leaving a preload force on the interface element (120) with which the MEMS micromirror unit (100) can be fixed in the receptacle (210).

The invention discloses a composite aluminum plate with an embedded mixed melting layer microstructure and a cast-rolling preparation method of the composite aluminum plate, and belongs to the technical field of aluminum alloy material preparation, the composite aluminum plate comprises a coating aluminum alloy, a matrix aluminum alloy and an embedded brazing flux mixed melting layer, the coating aluminum alloy is connected with the matrix aluminum alloy through the embedded brazing flux mixed melting layer, and the matrix aluminum alloy is connected with the embedded brazing flux mixed melting layer. The pre-embedded brazing flux mixed melting layer is a controllable mixed metal layer formed by mixing pre-embedded brazing flux metal and a fusion layer formed by a solid-liquid cast rolling process, the cast rolling preparation method is a coating-cast rolling combined preparation method, and the method has the advantages of being short in process, high in production efficiency, high in pre-embedded layer control precision and the like, and large-scale production of products is facilitated.

The invention relates to the technical field of brazing processes, in particular to a brazing process for connecting aluminum oxide ceramic and metallic titanium through low-activation brazing filler metal. According to the technical scheme, the method comprises the following steps that a to-be-welded face of the aluminum oxide ceramic is subjected to magnetron sputtering titanium film plating, the sputtering power ranges from 80 W to 150 W, the argon pressure ranges from 0.5 Pa to 1.5 Pa, the film thickness ranges from 0.5 micrometer to 5 micrometers, inert gas annealing treatment is conducted after film plating, the annealing temperature ranges from 400 DEG C to 550 DEG C, and the heat preservation time ranges from 10 min to 30 min; and the surface of the metal titanium substrate is subjected to laser micro-texture treatment, and a periodic groove structure with the depth being 10-50 microns is formed. The problems of poor wettability of the brazing filler metal and the ceramic, low joint strength and joint stress cracks are solved, meanwhile, radioactive substances generated by the brazing filler metal under the irradiation condition can be released within a short time, the equipment maintenance period is greatly shortened, and the equipment service life is prolonged.

The invention discloses a method for brazing and connecting diamond and copper through Ag-Cu eutectic brazing filler metal. The method comprises the following steps that S1, coating treatment is conducted on diamond, and surface metallized diamond is obtained after heating activation; s2, copper to be brazed and the surface metallized diamond are subjected to brazed connection through Ag-Cu eutectic brazing filler metal; wherein in the step S1, a titanium layer, a molybdenum layer and a nickel layer are sequentially deposited on the surface of the diamond, and coating treatment of the diamond is achieved. According to the method, the residual stress of the brazed joint can be reduced, the service life of the brazed joint is prolonged, the sealing performance of the brazed joint is improved, and important reference is provided for preparation of the large-size diamond microwave window.

The invention provides a laser-induced composite material surface multi-scale micro-texture assisted brazing method which comprises the following steps: step 3, carrying out surface texturing treatment on a to-be-welded surface of a fiber reinforced ceramic matrix composite obtained in step 2 by using a laser in air, and in the laser texturing process, carrying out surface texturing treatment on the to-be-welded surface of the fiber reinforced ceramic matrix composite, the fiber-reinforced ceramic matrix composite material is placed in the center of a laser objective table, then laser with the defocusing amount being-5-5 mm, the laser power being 0-300 W and the laser scanning speed being 5-100 mm s <-1 > is adopted for vertical irradiation, and the textured fiber-reinforced ceramic matrix composite material is obtained; and fourthly, active brazing filler metal is placed between the textured fiber-reinforced ceramic matrix composite obtained in the third step and the to-be-welded face of metal, and brazing assembly is completed. According to the method, the original straight interface reaction layer is textured through a surface material reduction method, and compared with a surface material increase method which is complex in process, harsh in process condition and high in process cost, the economic cost and the labor cost of the process are greatly reduced through the method.

The invention discloses a metal crack repairing method and device based on an ultrasonic technology. The method comprises the steps that metal powder is selected as brazing filler metal and pretreated; cleaning cracks in the metal base material and spraying a boron nitride coating; mixing an ethanol solution with brazing filler metal powder according to a preset proportion, stirring to form a uniform suspension, injecting the suspension into the crack filling area through a needle tube in a vacuum negative pressure environment, preheating to accelerate solvent volatilization, and only leaving and compacting the brazing filler metal powder; clamping and fixing the base material and putting the base material into a vacuum chamber; electron beam melting is started, snakelike scanning is conducted in the length direction of the crack, and meanwhile ultrasonic vibration is conducted on the crack; and after fusion is completed, ultrasonic vibration is continuously carried out to restrain grain coarsening. Aiming at crack repair of a high-temperature metal part, through the coupling effect of electron beam melting and ultrasonic vibration, the limitation of a single technology is broken through, and a complete and synergistic repair system is formed.

The invention provides a method for preparing a preset gold-tin soldering ring of a cover plate by using ultrafast laser processing, which comprises the following steps: S1, constructing a surface microstructure of the cover plate by using the ultrafast laser: selecting the cover plate with a specified size, processing by using the ultrafast laser, constructing the microstructure on the surface of the cover plate under nitrogen / argon mixed protective gas, and forming the microstructure on the surface of the cover plate by using the ultrafast laser; then, surface metallization treatment is completed through a multi-stage plating process, and a composite plating layer is formed; and S2, vacuum hot-pressing pre-melting of a welding ring: stamping a gold-tin alloy to form a sheet-shaped welding ring, and then pre-melting the gold-tin welding ring on the cover plate with the microstructure obtained in the step S1 by adopting a vacuum hot-pressing backflow process, so as to form the cover plate with the preset gold-tin welding ring. According to the invention, the assembly process of the cover plate and the gold-tin soldering ring can be simplified, and solder overflow and cover climbing during packaging of the cover plate and the substrate are inhibited.

The invention discloses a semiconductor chip welding method and device, and the method comprises the steps: carrying out the thermal field scanning of a multi-layer stacked package, obtaining the overall thermal imaging data, and generating a thermal field partition diagram containing a plurality of independent thermal control partitions; performing pulse type backflow heating treatment on each independent thermal control subarea to obtain real-time temperature data; carrying out real-time molten state detection to obtain surface topography data and temperature distribution data; performing atmosphere switching treatment on the independent thermal control subareas in the cooling stage to generate atmosphere switching subareas; performing micro-cycle steady-state detection on the atmosphere switching subareas, and performing local reheating treatment on the abnormal atmosphere switching subareas to generate reheating subareas; and carrying out dynamic cooling treatment on the reheating subarea. According to the technical scheme provided by the invention, through combination of partitioned pulse backflow and real-time monitoring, the welding spot melting state in multi-layer stacked packaging is accurately controlled, and the incomplete backflow defect is effectively prevented.