299results about "Electron beam welding apparatus" patented technology

The invention discloses a dynamic regulation and control device and method for aluminum alloy electron beam welding residual stress, and belongs to the technical field of electron beam machining, and the device integrates a multi-sensing information acquisition system, a vibration system and a control system. The sensing information acquisition system measures the surface residual stress of a welding seam and a heat affected zone in real time and in situ in the welding process through a vacuum compatible X-ray probe and a detector, compares the predicted stress with a target value, and generates a regulation and control instruction of electron beam welding parameters through the control system; the electron beam welding behavior is adjusted in real time to dynamically control stress, and the vibration system is used for applying high-frequency micro-amplitude vibration to a local high-stress area of a weldment to promote residual stress release. The device integrates monitoring, regulation and stress release functions in a vacuum environment, can remarkably reduce welding residual stress and improve welding seam quality, and is particularly suitable for electron beam welding of large thin-wall aluminum alloy structural parts.

The application provides a one-time forming electron beam welding method for a titanium alloy component with single-sided incidence and double-layer welds, which comprises the following steps: a closed cavity structure titanium alloy component is formed by a plurality of mutually shielded multi-layer thin plates through single-direction electron beam incidence; the focusing current of the electron beam is adjusted; the converging effect of the electromagnetic coil is changed to change the focus position, and then the electron beam keyhole depth and size are changed; the keyhole is adjusted to be an energy channel through which the electron beam passes; the electron beam energy can pass through the first layer of welds to reach the second layer of welds; the controllable linear energy is provided by combining the acceleration voltage, the welding current and the welding speed to ensure that the remaining energy that penetrates reaches the second layer of welds to complete the welding of the second layer of welds again; the low-frequency scanning is combined with the electron beam movement to drive the first layer of molten pool metal to flow and fill the rear channel, and the front channel is opened, so that the channel is dynamically smooth and stable, and the electron beam keyhole effect behavior is adjusted.

The invention provides an ultrathin-wall niobium-tungsten alloy and titanium alloy dissimilar metal electron beam welding method which comprises the following steps: step 1, cleaning the to-be-welded parts of niobium-tungsten alloy and titanium alloy by using absolute ethyl alcohol, and then drying; step 2, assembling; the niobium-tungsten alloy and the titanium alloy part are in butt joint and fixed; 3, vacuum electron beam welding is used for positioned welding; and 4, formal welding is conducted. After welding, the surface of a welding seam is formed well, good metallurgical fusion is achieved, and the welding seam welded through a vacuum electron beam meets the QJ 20622-2016 I-level standard; under the room temperature condition, the tensile strength of the welding seam reaches 80% of that of titanium alloy base metal; a hydraulic strength test is carried out on a welding seam, and the welding seam is free of leakage and deformation when the pressure is maintained for 5 minutes under 4.1 MPa. An airtight test is carried out on a welding seam, the requirement that air leakage is avoided under the pressure of 3 MPa for 5 min is met, and the design structure size is promoted to continuously break through in the miniaturization and precision direction.

The invention discloses a 30CrMnSi alloy steel electron beam welding method and application thereof, and relates to Cr-Mn-Si alloy steel electron beam welding, and the 30CrMnSi alloy steel electron beam welding method specifically comprises the steps that a plurality of sections of cleaned to-be-welded parts are assembled in pairs to form to-be-welded weld joints, and the to-be-welded weld joints are subjected to section welding; electron beam scanning preheating is conducted on the to-be-welded weld joint after segment welding; the preheated to-be-welded weld joint is subjected to seal welding, and the focusing current is set to be in a surface focusing state during seal welding; welding the to-be-welded weld joint after seal welding, wherein the focusing current is set to be in a lower-focus state during welding; and performing modification welding on the welded weld joint, wherein the focusing current is set to be in an upper-focus state during modification welding. According to the method, under the cooperative treatment of electron beam scanning preheating, seal welding, welding and modification welding on the weld joint to be welded, the smooth weld joint without cracks, splashing and pits is finally obtained, so that the workpiece to be welded can reach the GJB-1718A standard, and the requirement for nondestructive testing of the I-level weld joint of pressure-bearing equipment is met.

The present application belongs to the field of ground simulation facilities, and particularly relates to a gravity level ground simulation device and method for extraterrestrial environment welding. The device comprises a general control system, a vacuum system, an outer pipe assembly and a gravity level control mechanism. The general control system can control various parameters during the operation of the device. The vacuum system and the gravity level control mechanism provide two space environment characteristics of high vacuum and different levels of gravity for experiments requiring space simulation. The vacuum degree in the device can reach 10 ‑4 Pa, which can simulate the high vacuum environment in space. The adjustment of different gravity levels of 0-4g0 can ensure that the device has the ability to simulate the gravity of various extraterrestrial planets. Moreover, the device has the advantages of flexible and stable gravity level, high experimental repetition rate, low cost, high safety, etc. and can be used to study the basic welding theory under different gravity levels in space environment, thereby filling the blank of the gravity level ground simulation device specially used for extraterrestrial environment welding.

We describe a system for use in an apparatus for producing a three-dimensional workpiece using an additive layer manufacturing technique, the system comprising: an irradiation unit configured to selectively irradiate an irradiation plane with an irradiation beam, and a control unit coupled to the irradiation unit and configured to control the irradiation unit to modulate, as a function of a local process parameter when producing the three-dimensional workpiece, an irradiation beam property of the irradiation beam.

The present invention has the following composition by mass: 16.5%≦Cr≦25.0%; 11.0%≦Mo≦18.0%; 2.0%≦W≦7.0%; Fe≦1.0%; Mo+W≦-0.5×(Cr+Fe)+30%; Mo+W≧-0.5×(Cr+Fe)+25%; Ti+Ta≦0.80%; 0.01%≦Si≦0.75%; 0.01%≦Al≦0.35%; 0.01%≦Mn≦0.35%; Ca≦0.005%; Mg≦0.005%; Nb≦0.0 1%; 0.001%≦C≦0.05%; 0.001%≦N≦0.05%; S≦0.003%; P≦0.005%; optionally 0.0010%≦Rare Earths≦0.015%, wherein the silicon content is less than or equal to 0.25% in the presence of rare earths in amounts between 0.0010% and 0.015%, the remainder being nickel and unavoidable impurities resulting from processing, and the nickel content is greater than or equal to 54%.

A method for joining a first component (12) and a second component (14) using an electron beam (34) is described. The first component (12) and the second component (14), as well as a filler wire (30), are provided, wherein the first component (12) and the second component (14) form a joining zone (16) which includes a gap (18) located between the first component (12) and the second component (14). Furthermore, the first component (12) and the second component (14) are joined by means of the electron beam (34) by means of at least partial bridging of the gap (18), wherein the electron beam (34) is guided along an irradiation pattern (44), and wherein the filler wire (30) is used in the material-joining of the first component (12) and the second component (14).Furthermore, a device (10) for joining a first component (12) and a second component (14) is presented, which is set up to carry out such a procedure.

The invention relates to a method for manufacturing a component (100) in which at least two individual parts (110, 120) are reshaped by the action of a high-pressure working medium and subsequently joined together, and which comprises the following steps: - Inserting the individual parts (110, 120) into a forming tool (200) which has at least one window (230) permeable to a welding jet (410), - Closing the mold tool (200) so that an interior of the mold tool (200) is divided into at least two enclosed pressure areas (240, 250), - Applying a high-pressure active medium to the closed mold tool (200) such that a first internal pressure (p) is created in a first pressure area (240). i1 ) is built up, which is greater than a second internal pressure (p i2 ) in a second printing area (250), - Forming the individual parts (110, 120) until the first internal pressure (p i1 ) equal to the second internal pressure (p i2 ) is, - Joining the individual parts (110, 120) to form a component (100) by welding, wherein a welding jet (410) is directed through the at least one window (230) onto the individual parts (110, 120). The invention further relates to a device for carrying out the method.

A method for manufacturing a structure comprising cavities, the method comprising the following steps: a) forming hollow areas (110) in a first face (101) of a substrate (100) made of a first material, b) depositing a plate (200) made of a second material onto the first face (101) of the substrate (100), so as to cover the hollow areas (110) of the substrate (100), c) performing resistance welding, electron beam welding, or laser beam welding, preferably under vacuum, around the hollow areas, thereby welding the plate (200) onto the substrate (100) and forming cavities, d) performing a hot isostatic compression diffusion welding step on the assembly obtained. Figure for the abstract: 5A

The present application relates to the technical field of electron beam welding, in particular to a tube sheet welding tool and a welding method, the welding tool comprises an inner support, a backing ring and a heat dissipation assembly, the inner support supports the pipe opening of the connecting pipe, so that the pipe opening of the connecting pipe is not prone to collapse during the welding process, the backing ring is supported on the side of the tube sheet away from the to-be-welded part to block and dissipate heat on the back side of the weld, so as to avoid melting through on the back side of the weld, and the control of the weld width and the penetration depth is realized, at the same time, the heat dissipation assembly is attached to the side of the backing ring away from the to-be-welded part to dissipate heat on the back side of the weld, so as to avoid the deformation of the tube sheet during the welding process, the cooperation of various structures ensures the welding quality and improves the fusion rate; the tube sheet welding method adopts the above welding tool and adopts the welding sequence of spot welding, pre-welding and formal welding, so as to avoid the collapse of the pipe opening of the connecting pipe during the welding process, and the weld width and the penetration depth are easy to control, and the welding quality and the fusion rate can be effectively improved.

The application provides a cavity structure part annular electron beam welding joint design method, which comprises the following steps: tilting the angle of the radial ring weld of a part along the part axis direction clockwise by a preset angle, so that the closest distance of the beam current to the flange edge of the part casting body on the side of the radial ring weld is increased, the welding lock bottom is also increased in thickness due to the tilt of the weld, the part can be prevented from being damaged during welding, and the risk of splashes generated by penetrating the welding lock bottom is reduced; a filler platform is arranged on the side of the cover plate at the radial ring weld, which can help quickly find the weld position in the equipment observation system and facilitate welding; the axial ring weld of the part is offset to one side of the part casting body by a preset distance, so that the weld is changed from a no-welding lock bottom end face weld to a welding lock bottom butt joint weld, a boss is added to the inner wall of the cover plate to form a butt joint structure with the casting body, so that non-penetration welding can be ensured, and welding splashes in the part inner cavity are prevented.

A method for producing a welded metal blank (16) includes cutting a first initial metal sheet (1) and a second initial metal sheet (3) from a first and second metal strip (4); joining the first and second initial metal sheets (1,3) by welding so as to obtain an initial welded metal blank (9), the initial welded metal blank (9) comprising a weld joint (10) joining the first and the second initial metal sheets (1,3); and cutting said initial welded metal blank (9) by a process involving metal melting so as to obtain at least one final welded metal blank (16) comprising a first metal blank portion (17) and a second metal blank portion (18) joined by a weld joint portion (19) consisting of a portion of the weld joint (10) obtained during the joining step.

The invention discloses a welding process for a storage tank with a step Z-shaped curve welding seam, and belongs to the technical field of electron beam welding. The method is used for solving at least one of the problems that in the prior art, when electron beam welding is used for Z-shaped step focusing current, it is difficult to quickly respond to frequent fluctuation of the working distance, welding defects occur to weld joints, and an assembly tool cannot stably fix a storage box. The storage box welding process comprises the steps that a first end frame, a second end frame, a left side skin, a right side skin and a lower side skin are placed on an assembly tool and assembled in place; performing positioned welding on to-be-welded welding lines of the first end frame, the second end frame, the left side skin, the right side skin and the lower side skin; and electron beam welding is conducted on the first end frame, the second end frame, the left side skin, the right side skin and the lower side skin. The method can be used for welding the storage tank with the step Z-shaped curve welding seam.

A method of additive manufacture is disclosed. The method may include restricting, by an enclosure, an exchange of gaseous matter between an interior of the enclosure and an exterior of the enclosure. The method may further include running multiple machines within the enclosure. Each of the machines may execute its own process of additive manufacture. While the machines are running, a gas management system may maintain gaseous oxygen within the enclosure at or below a limiting oxygen concentration for the interior.

The invention discloses a method for electron beam fuse additive manufacturing of a beta titanium alloy component, and belongs to the technical field of additive manufacturing. The invention aims to solve the problems of long period, low efficiency, low utilization rate, serious oxidation, obvious beta spots and poor obdurability of beta titanium alloy preparation in the prior art. The method comprises the following steps: pre-treating a printing wire and a substrate; the method comprises the following steps: establishing a three-dimensional solid model based on a target beta titanium alloy component, slicing the three-dimensional solid model to generate multi-layer two-dimensional slicing data, importing the slicing data into electron beam fuse additive manufacturing equipment, and setting a scanning path, preheating parameters and printing process parameters; and the equipment is started and vacuumized, beta titanium alloy printing is conducted according to set printing parameters and programs, all layers are completed, and the beta titanium alloy component is manufactured. The beta titanium alloy component prepared through the method is high in density, and a reliable technical approach is provided for preparation of high-performance beta titanium alloy components in the fields of aerospace and the like.

The utility model discloses an electron beam welding machine which comprises an installation base, a driving module and a welding module, the driving module is installed on the installation base, the welding module is installed on the driving module, and the installation base comprises a bottom plate and a first installation plate. The first installation plate is fixedly installed on the bottom plate and is perpendicular to the bottom plate. According to the electron beam welding machine, linkage is carried out through the installation base, the driving module and the welding module, the driving module is started according to the welding requirement, so that the welding module is driven to move to the position needing welding, and the electron beam welding machine has the advantages of being stable in structure, high in efficiency, high in practicability and the like.

The invention discloses a preparation method of a high-flow niobium-zirconium alloy heat exchange plate. The preparation method comprises the following steps: 1, preparing a plate blank; 2, material reduction processing of the first plate sheet; thirdly, material reduction machining is conducted on the second plate sheet; 4, aligning and pressing the first plate and the second plate; and fifthly, the first plate and the second plate are welded through electron beams. Through an internal mechanical interlocking structure, the problem of medium interpenetration between flow channels is effectively solved while large flow is achieved, and the heat exchanger has high structural reliability and is particularly suitable for heat exchange scenes of severe media such as liquid metal, diffusion welding is replaced with the electron beam seal welding process, and the heat exchange efficiency is improved. And the problem of runner crushing caused by local pressure concentration is fundamentally avoided.

Provided are a mount system and systems and methods using the mount system for manufacturing objects, especially titanium and titanium alloy objects, by directed energy deposition. The methods include thermally pre-bending the substrate onto which the object is to be manufactured to form a pre-bent substrate, attaching the pre-bent substrate to a jig using the mount system as an underlying support, pre-heating the substrate, and forming the object on the pre-heated, pre-bent substrate using a directed energy deposition technique.

Embodiments of the present application relate to the technical field of electron beam welding, and particularly relate to a welding method for connecting molybdenum alloy and niobium alloy dissimilar materials, which comprises the following steps: S1, preparing a molybdenum alloy test sample and a niobium alloy test sample, and adopting an electron beam welding process to perform bias welding on the molybdenum alloy test sample and the niobium alloy test sample with a first bias beam amount, to obtain a welded test sample; S2, determining a molybdenum alloy side fusion line of the welded test sample, and determining an included angle between a butt joint surface of the molybdenum alloy test sample and the molybdenum alloy side fusion line of the welded test sample; S3, determining actual welding parameters for performing bias welding on a molybdenum alloy actual sample and a niobium alloy actual sample by using the electron beam welding process, according to the included angle, the first bias beam amount and a thickness of the molybdenum alloy test sample; and S4, welding the molybdenum alloy actual sample and the niobium alloy actual sample according to the actual welding parameters. The welding method provided by the embodiments of the present application is conducive to improving the welding quality.

The invention relates to a method for joining a first component (12) and a second component (14) by means of an electron beam (34). The first component (12) and the second component (14) and a filler wire (30) are provided, the first component (12) and the second component (14) forming a joining zone (16) which comprises a gap (18) lying between the first component (12) and the second component (14). In addition, the first component (12) and the second component (12) are integrally bonded by means of the electron beam (34), with bridging of the gap (18) at least in parts, wherein the electron beam (34) is guided along an irradiation pattern (44), and wherein the filler wire (30) is used in the integral bonding of the first component (12) and the second component (14). The invention also relates to a device (10) for joining a first component (12) and a second component (14), the device being designed to carry out a method of this type.

Device surfaces are rendered superhydrophobic and / or superoleophobic through microstructures and / or nanostructures that utilize the same base material(s) as the device itself without the need for coatings made from different materials or substances. A medical device includes a portion made from a base material having a surface adapted for contact with biological material, and wherein the surface is modified to become superhydrophobic, superoleophobic, or both, using only the base material, excluding non-material coatings. The surface may be modified using a subtractive process, an additive process, or a combination thereof. The product of the process may form part of an implantable device or a medical instrument, including a medical device or instrument associated with an intraocular procedure. The surface may be modified to include micrometer- or nanometer-sized pillars, posts, pits or cavitations; hierarchical structures having asperities; or posts / pillars with caps having dimensions greater than the diameters of the posts or pillars.

This invention discloses a lower beam channel protection device for an electron beam welding machine, comprising a base, a copper tube, arc-shaped pins, and a protective cover. A flange is fixed to the top of the final stepped channel of the lower beam channel, with the center of the flange's central hole coinciding with the center of the final stepped channel. The base has a cylindrical main structure, with the upper end of the cylinder extending horizontally outward to form an extension section. The base has a T-shaped longitudinal section, and the extension section is fixed to the lower surface of the flange. Both the base and the flange are made of copper. The copper tube is fixedly engaged in the base. The upper end of the protective cover has a first through hole with an inner diameter equal to the outer diameter of the copper tube. The upper end of the protective cover is fitted onto the copper tube through the first through hole. Several second through holes are provided on the copper tube, with the upper end of each second through hole coinciding with the lower surface of the inner side of the upper end of the protective cover. The number of arc-shaped pins is the same as the number of second through holes, and each arc-shaped pin is fixedly inserted into the corresponding second through hole. The outer edge of the lower end of the protective cover is in contact with the top surface of the vacuum chamber wall.

This invention discloses a vacuum electron beam deep penetration welding method for refractory metals, belonging to the field of welding technology. The method includes: butt-fitting pre-treated refractory metal plates with a butt gap controlled at 0.05~0.1mm; performing vacuum electron beam welding; and offsetting the electron beam focus from the upper surface of the plate towards the plate thickness by 0.5~1mm. After welding, a low-temperature heat treatment is performed, followed by furnace cooling. This invention overcomes the contradiction between increasing the penetration depth of refractory metals and joint embrittlement, achieving a balance between increasing penetration depth and protecting joint performance.

The present disclosure generally relates to additive manufacturing systems and methods on a large-scale format. One aspect involves a build unit that can be moved around in three dimensions by a positioning system, building separate portions of a large object. The build unit has an energy directing device that directs, e.g., laser or e-beam irradiation onto a powder layer. In the case of laser irradiation, the build volume may have a gasflow device that provides laminar gas flow to a laminar flow zone above the layer of powder. This allows for efficient removal of the smoke, condensates, and other impurities produced by irradiating the powder (the "gas plume") without excessively disturbing the powder layer. The build unit may also have a recoater that allows it to selectively deposit particular quantities of powder in specific locations over a work surface to build large, high quality, high precision objects.

The application discloses a vacuum electron beam welding method of a heterogeneous metal electromagnet blank, and the sleeve ring, the magnetic conducting ring, the magnetic shielding ring and the stop iron are assembled into an integrated whole through design of a welding mandrel and a welding clamp, three welding seams are designed, and welding of each component is completed by adopting different welding sequences; the scheme ensures that there are no defects such as cracks and incomplete fusion in the welding seam of the heterogeneous metal electromagnet blank, meets the requirements of a first-grade welding seam of a relevant standard, simultaneously improves the welding deformation of the electromagnet blank, and ensures that the coaxiality of the electromagnet blank after welding meets the subsequent machining requirements.

This invention discloses a novel welding machine, comprising: a welding frame, the welding frame including a support frame, a sealed door on the front of the support frame, a welding chamber at the upper end of the inner cavity of the support frame, and a welding table at the bottom of the inner cavity of the welding chamber. This invention belongs to the field of welding machine technology. The purpose of this invention is to solve the problems of traditional hot cathode electron beam welding machines in the prior art, where the hot cathode requires continuous preheating, has a long start-up time, and still needs to maintain a high temperature in standby mode. The technical effect achieved is: using a directional carbon nanotube array microbeam emitter as a cold cathode, utilizing the field emission principle of carbon nanotubes, an electric field is applied between the grid and the cathode to allow electrons to escape from the tip of the carbon nanotube through quantum tunneling effect, without heating the cathode to a high temperature, achieving millisecond-level instantaneous start-up, solving the drawback of traditional welding machines requiring 5-10 minutes of preheating, and significantly improving work efficiency and equipment response speed.

The system includes a high vacuum chamber, a bakeout chamber, and an ultra-high vacuum (UHV) chamber that is configured to be removably disposed on the high vacuum chamber and the bakeout chamber. The system further includes a heating element configured to heat the UHV chamber and desorb water vapor from the UHV chamber with the UHV chamber disposed on the bakeout chamber, and a gas source configured to supply a backfill gas to the UHV chamber disposed on the bakeout chamber. The system further includes a bakeout vacuum pump configured to extract the water vapor from the UHV chamber with the UHV chamber disposed on the bakeout chamber, and a high vacuum pump configured to extract the backfill gas from the UHV chamber with the UHV chamber disposed on the high vacuum chamber.

The application relates to the technical field of space storage tanks, in particular to a spaceflight storage tank welding size compensation positioning ring, a spaceflight storage tank comprising a shell assembly and a management device assembly, the positioning ring comprising a radial ring seam welding area, an axial circular welding area and a transition assembly area, wherein: the shell assembly and the management device assembly are pre-assembled; the transition assembly area of the positioning ring is arranged between the shell assembly and the management device assembly; the positioning ring is integrally welded and fixed with the shell assembly through the radial ring seam welding area and is integrally welded and fixed with the management device assembly through the axial circular welding area. The application realizes the welding of the transition piece of the storage tank shell and the management device by welding the positioning ring and the shell in the radial ring seam and welding the management device in the axial circular seam, so that the storage tank satisfies high-precision and high-strength welding forming, and the management device and the shell maintain a high-precision structure size and shape-position size relationship.

Provided are a systems and methods for continuously providing a metal wire to a welding torch for manufacturing objects by solid freeform fabrication to provide continuous deposition of metal to the freeform object, especially objects made with titanium or titanium alloy wire.