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503results about How to "Improve connection strength" patented technology

Tungsten-rhenium-molybdenum alloy rotary anode target material for X-ray tube and preparation method thereof

The invention relates to a tungsten-rhenium-molybdenum alloy rotary anode target material for an X-ray tube and a preparation method thereof, wherein the target material relates to the technical field of powder metallurgy. The tungsten-rhenium-molybdenum alloy rotary anode target material for the X-ray tube comprises a tungsten-rhenium alloy layer and a molybdenum alloy layer. Tungsten-rhenium pre-alloy powder and molybdenum alloy powder are used as raw materials. The tungsten-rhenium-molybdenum alloy rotary anode target material is prepared through the steps of a compression molding step, a high-temperature sintering step, a hot isostatic pressing step, a straightening shaping step and a machining step, wherein the compression molding step, the high-temperature sintering step, the hot isostatic pressing step, the straightening shaping step and the machining step are successively performed. The tungsten-rhenium-molybdenum alloy prepared by the invention has excellent performances of small crystal grain, uniform tissue, relatively low impurity element content, high compactness, high strength, etc. The rotary anode target prepared by the tungsten-rhenium-molybdenum alloy for the X-ray tube has advantages of high product qualified rate, high heat dissipation performance, high heat impact resistance, long service life, etc.
Owner:安泰天龙钨钼科技有限公司 +1

Multi-directionally preformed braided part and three-dimension integrally braiding method thereof

InactiveCN101586285AImprove connection strengthUniform flower nodesBraidEngineeringFiber bundle
The invention discloses a multi-directionally preformed braided part, which comprises at least two components having different forming directions. Fiber bundles inside the braided part run through the components along different forming directions to form an integral structure. The intersection position of the components having different forming directions is provided with a through hole. The invention also provides a three-dimension integrally braiding method of the multi-directionally preformed braided part, which comprises: a step 1 of determining forming directions; a step 2 of determining a theoretical intersection position; a step 3 of determining a thread leading region and a thread adding region for theoretical intersection; a step 4 of braiding the first component, in which a fiber bundle passing the position of the thread leading region for theoretical intersection is led out and a leading-out end is left when the braiding reaches the position, and new fiber bundles prepared in advance are added to the position of the thread adding region for theoretical intersection and a preserved end is left when the braiding reaches the position; and a step 5 of changing braiding direction to braid the second components till the braiding of the second component is finished.
Owner:BEIHANG UNIV

Method for low loss welding and end face treatment of photonic crystal optical fiber

InactiveCN102169209AReduce light guide lossImprove connection strengthCoupling light guidesMode field diameterPhotonic-crystal fiber
The invention discloses a method for low loss welding and end face treatment of a photonic crystal optical fiber, and belongs to the technical field of photonic crystal optical fiber post-treatment. The method comprises the following steps of: cutting the photonic crystal optical fiber and another optical fiber to be welded with the photonic crystal optical fiber by using an optical fiber cutter; performing tapering treatment on the optical fiber which has a large diameter not matched with the diameter of a model field according to specific parameters of the two optical fibers so that the optical fiber is matched with the model field of the optical fiber to be welded; placing the two optical fibers of which the end faces are treated into an optical fiber welding machine and welding the two optical fibers; performing collapse treatment on one side end face of the welded photonic crystal optical fiber in accordance with the requirement through welding loss measurement and flattening the end face of the welded optical fiber at the other end by using the cutter; and grinding and polishing the two ends by using a grinder so as to obtain flat and smooth solid end faces. By the method, model field matching of butted optical fibers is realized; and the method is suitable for low loss welding among photonic crystal optical fibers as well as between the photonic crystal optical fiber and a common optical fiber.
Owner:BEIJING UNIV OF TECH

Integrally formed inductor and manufacture process thereof

The invention discloses an integrally formed inductor and a manufacture process thereof, comprising a coil, two electrode pins and a magnetic solid body formed by press powder. The coil is embedded in the magnetic solid body; first end parts of the two electrode pins are embedded in the magnetic solid body with electric clearances and are electrically connected with two pins of the coil; second end parts of the two electrode pins are bent and tightly attached to the surface of the magnetic solid body; the first end part of each electrode pin is provided with two vertical clamping pieces which are integrally bent and formed; and the pins of the coil are clamped in the two vertical clamping pieces and are welded and electrically connected. By adopting the structure, the connection strength between the coil and the electrode pins is enhanced, the connection reliability between the coil and the electrode pins is ensured, thereby avoiding the quality hidden trouble and finally greatly improving the quality of products. In addition, through reasonably arranging the manufacture process of the inductor and simplifying the manufacture flow, the invention ensures that the manufacture of the inductor can be finished automatically, simply and fast, and has the remarkable characteristics of high efficiency and high quality.
Owner:奋发电子(东莞)有限公司

Methods for preparing transition joint of different metal materials

The invention provides methods for preparing a transition joint of different metal materials, relates to the methods for preparing the joint of the different metal materials, and solves the problems of low reliability and poor gas tightness of the joint of different metal materials by adopting the prior connecting method. The first method comprises the following steps: 1, grinding a metal material A; 2, deoiling and cleaning the metal material A, heating the metal material A and preserving the heat under an air condition; 3, performing hot pressing joining of the heated metal material A and a metal material B; 4, preserving the heat, and then obtaining the transition joint of the different metal materials. The second method comprises the following steps: 1, grinding the metal material A; 2, deoiling and cleaning the metal material A, heating the metal material A and preserving the heat under a vacuum or inert gas condition; 3, performing hot pressing joining of the heated metal material A and a metal material B; 4, preserving the heat and then obtaining the transition joint of the different metal materials. The transition joint of the different metal material prepared by the methods has the advantages of high connection strength, good air tightness of the joint, high working reliability and the like.
Owner:HARBIN INST OF TECH

Liftable rack and refrigeration equipment

The invention provides a liftable rack and refrigeration equipment. The liftable rack comprises a rack body and a liftable mechanism which comprises a drive mechanism and a guide mechanism, wherein the drive mechanism and the guide mechanism are connected to the rear end of the rack body; the drive mechanism is used to drive the rack body to move linearly up and down along the guide mechanism; andconnection parts between the drive mechanism and the guide mechanism and the rack body are located along the width direction of the refrigeration equipment. The liftable rack is characterized in thatthe drive mechanism and the guide mechanism are configured along the width direction of the refrigeration equipment; two pivots are formed at the connection parts between the drive mechanism and theguide mechanism and the rack body; and the two pivots are configured along a left-right direction of the rack body, so the two pivots are limited by each other, and rotation of the rack body along a rotation axis which extends along the front-back direction of the rack body relative to the liftable mechanism is effectively prevented. In this way, left-right inclination of the rack body is prevented based on principles of mechanical limiting and thus stability of ascending and descending motion of the rack body is enhanced.
Owner:HEFEI HUALING CO LTD +2

Method for preparing CuW/Cu/CuCrZr integrated contact through electron beam welding

The invention provides a method for preparing a CuW/Cu/CuCrZr integrated contact through electron beam welding and belongs to the field of production and manufacturing of high-voltage switch electrical contacts. One side of the electrical contact is made of a base material CuW/Cu, and the other side of the electrical contact is made of a base material CuCrZr. The method comprises the following steps that 1, the base material CuW/Cu on one side of the electrical contact is manufactured in a connection mode through a sintering method; and 2, the CuW/Cu subjected to sintering treatment and the CuCrZr are subjected to direct electron beam welding, a welding surface is made of Cu and the CuCrZr, a welded joint is a square butt joint, the joint gap value is zero, welding filling materials are not filled, a weld forming a 45-degree angle with the axis of the contact is adopted for electron beam welding, and thermal treatment is not needed after welding. Compared with the prior art, the high-temperature mechanical performance of chromium-copper can be improved, and the high welding strength can be achieved; moreover, it can be guaranteed that a Cu base is not annealed or softened; meanwhile, the stress of a vertical weld heat-affected zone is small, the sectioned contact cannot deform after being pulled and inserted for many times, and the contact finger force is stable.
Owner:SHENYANG JINCHANG LANYU NEW MATERIAL CO LTD

Vegetation ecological concrete slope protection structure and construction method

InactiveCN107083762AReinforces the surface's ability to resist the impact of rainImprove connection strengthCoastlines protectionExcavationsShoreStormwater
The invention discloses a vegetation ecological concrete slope protection structure and a construction method, which comprises a soil slope, one side of the soil slope is provided with a solid cage toe wall, and a slope protection net box is arranged above the soil slope, and the slope protection net box is filled with For ecological concrete, the side of the slope protection net box away from the soil slope is provided with a first installation groove, and a fixed pile is arranged in the first installation groove, and one end of the fixed pile penetrates the inner bottom of the first installation groove and extends into the soil slope. The invention has a simple structure, and the ability of the surface of the soil slope to resist the impact of rainwater is enhanced by cultivating root plants with ecological concrete in the slope protection net box. The card slot is separated, the rotating sleeve is rotated, and the first card block is connected with the first card slot to drive the rotating shaft to rotate, and the connecting rod drives the insert plate to insert the insert plate into the soil slope, so that the fixed pile is not easy to pull out, thereby strengthening the slope protection The connection strength between the cage and the soil slope.
Owner:JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH

BIM-based (building information modeling based) internal cladding and external connecting beam or column

The invention discloses a BIM-based (building information modeling based) internal cladding and external connecting beam or column. An active connector is fixed to an end of the beam or column in a sleeving manner, and/or a passive connecting structure is arranged on the side wall of the beam or column; the front end face of an active connector body is provided with an n-shaped hook, and a connecting flange is disposed at an edge of the front end face; the passive connecting structure is provided with a cladding hole in the sidewall of the beam or column or passive connector, and the cladding hole matches with the n-shaped hook. The hook is in a wedged structure or the cladding hole is in a wedged structure so that the beam and column are mounted by opposite inserting, the beam and the column extrude each other for tight attachment after sliding down under the gravitational action, and field connection is very quick without manual centralizing or added accessories for work. The beam and column positioned and compressed are connected through a flange and can be fixedly connected by using tapping screws or traversing bolts or by welding. Two supporting modes hook supporting and flange supporting are present, improving connection strength of the beam and column. The beam or column is simple in structure, very quick to construct in situ and suitable for popularization and implementation.
Owner:NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER

Linear multi-station device for connecting metal sheets through laser shock and method thereof

The invention provides a linear multi-station device for connecting metal sheets through laser shock and a method thereof. The device is composed of a laser emission system, a control system and a deformation connecting system. The laser emission system is composed of a base, a lens support, a pulsed laser device, a mirror and an adjustable focusing lens. The control system is composed of a laser controller, a computer, a hydraulic control system, a stepping motor controller and a three-dimensional moving platform controller. The deformation connecting system is composed of an edge pressing device, a workpiece system, a combined female die, an automatic die opening and closing device, a linear multi-station unit and a three-dimensional moving platform. According to the linear multi-station device, pulsed lasers are used as an energy source, deformation connection of two or more layers of the same or dissimilar metal sheets is achieved through the combined female die, the clamping-connection degree between the metal sheets is improved, multi-point connection between the sheets is achieved through the linear multi-station unit, and the connection strength is improved. The female die is automatically opened and closed through the automatic die opening and closing device, so that the work efficiency is improved; when the female die is closed, the linear multi-station device has a self-locking function, so that the precision of deformation connection is guaranteed.
Owner:JIANGSU UNIV

Combined anti-impact structure of rotor made from composite material, as well as preparation device and preparation method thereof

ActiveCN105584056AImprove connection strengthGood fiber positioning performanceThin walledHigh energy
The invention discloses a combined anti-impact structure of a rotor made from a composite material, as well as a preparation device and a preparation method thereof. The combined anti-impact structure comprises a metal thin-walled cylinder, an inner-side aramid fibre wrapped layer and an outer-side aramid fibre wrapped layer which are sequentially coated and fixed from the inside to the outside, wherein resin is infiltrated on the inner-side aramid fibre wrapped layer at intervals to enable the inner-side aramid fibre wrapped layer to be of a partially hollow structure, and the resin is uniformly infiltrated on the outer-side aramid fibre wrapped layer. According to the invention, on the basis of the existing structure of a rotor made from a composite material, the resin is infiltrated on the aramid fibre layers according to a certain rule, thus the partially hollow structure is formed; and due to the structure, on the basis of furthest reducing the weight of the structure, the thickness of the rotor is increased, the advantages of high toughness and high energy absorption performance of the aramid fibre layers are kept, and the anti-impact performance of the rotor made from the composite material is enhanced. Meanwhile, the combined anti-impact structure disclosed by the invention is capable of remarkably increasing the connection strength among the inner-side metal thin wall, the aramid fibre layers, and the outer-side composite material layer of the rotor made from the composite material, and high in fibre location performance.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1

Composite middle layer for performing diffusion bonding on silicon carbide ceramics and bonding process thereof

The invention discloses a composite middle layer for performing diffusion bonding on silicon carbide ceramics and a bonding process thereof. The composite middle layer for performing diffusion bondingon the silicon carbide ceramics is prepared from the following components in percentage by weight: 55 to 65 percent of high-purity titanium hydride powder, 20 to 25 percent of high-purity silicon powder (Si), 12 to 17 percent of high-purity graphite powder (C), and 1 to 3 percent of high-purity aluminum powder (Al). According to the composite middle layer disclosed by the invention, by utilizinga spark plasma sintering technology (SPS), a silicon carbide (SiC) joint, of which the thickness of a bonding layer is 20 micrometers to 100 micrometers, is prepared under a vacuum condition. A bonding layer material mainly consists of a titanium silicon carbide (Ti3SiC2), the silicon carbide (SiC) and titanium carbide (TiC). Through changing the proportions of the raw materials and process parameters of sintering, the highest shearing strength at a room temperature reaches 135.8MPa, and the hardness of the composite material of the bonding layer can reach 28.1GPa, exceeding the hardness of SiC base materials; and therefore, the composite middle layer disclosed by the invention has a higher practical value.
Owner:HEFEI UNIV OF TECH

High-airtightness special buttress thread pipe joint

The invention relates to a high-airtightness special buttress thread pipe joint, which comprises a coupling and a pipe body, wherein the middle part of the coupling is provided with an inner step cylindrical surface; the two ends of the coupling are provided with standard buttress inner threads; wedged inner threads are formed at the back ends of the buttress inner threads; the end part of the pipe body is provided with a standard buttress outer thread; a wedged outer thread is formed at the front end of the buttress outer thread; metal sealing structures are arranged between the two end faces of the inner step cylindrical surface and the end part of the pipe body respectively, and comprise an inner sealing structure arranged on the coupling, and an outer sealing structure arranged on the pipe body; the inner sealing structure comprises an inner conical surface and an inner shoulder angle projecting outwards; and the outer sealing structure comprises an outer conical surface and an outer shoulder angle depressing inwards. The wedged threads and a non-planar shoulder sealing structure are arranged on the end parts of the standard buttress threads, so that the connection strength, sealing performance, anti-bending capability, compression load resistance and anti-toque performance of the joint are improved.
Owner:WUXI SEAMLESS OIL PIPE

3D-printed electret micro-needle absorption-promoting facial mask

The invention relates to the field of beauty. A 3D-printed electret micro-needle absorption-promoting facial mask comprises a 3D-printed facial mask layer, the facial mask layer contains a matrix containing skin-care active ingredients, and a micro-needle array layer covers the lower surface of the facial mask layer; the micro-needle array layer comprises a base layer for fixing micro-needles, thehollow micro-needles are fixed on the base layer at equal intervals, the hollow part of each micro-needle forms a drug delivery channel, the upper end of the drug delivery channel penetrates into thefacial mask layer, and the lower end of the drug delivery channel faces outwards; and an isolation layer covers the upper surface of the facial mask layer, and an electret layer covers the upper surface of the isolation layer. In the invention, the electret layer and the micro-needle layer are additionally arranged on the facial mask layer, so that the micro current and the electrostatic field generated by the electret can be utilized to promote the matrix to penetrate into the inner layer of the skin. In addition, the 3D-printed facial mask layer is adopted by the patent, fits the human facebetter, and can be effectively reduce the suspension of the micro-needles, so that more micro-needles can abut against the skin, and the skin-care active ingredients in the matrix can reach the skinmore uniformly.
Owner:SHENZHEN HORB TECH CORP LTD

Building template strengthening device

The invention relates to the technical field of building construction matched tools, in particular to a building template strengthening device. Four fixing bases are included. A first clamping grooveand a second clamping groove are formed in the two sides in each fixing base correspondingly. Templates are clamped and connected in the first clamping grooves of the adjacent fixing bases. Fixing plates are arranged at the two ends of the reverse sides of the templates. Clamping mechanisms are arranged at the connecting positions of the interiors of the first clamping grooves and the templates. Strengthening plates are clamped and connected in the second clamping grooves of the adjacent fixing bases. Third clamping grooves and fourth clamping grooves are formed in the connecting positions ofthe interiors of the fixing bases and the second clamping grooves. Anti-disengaging mechanisms are arranged at the connected positions of the third clamping grooves, the fourth clamping grooves and the fixing bases. Installing grooves are formed in the upper ends and the lower ends of the outer portions of the reverse sides of the fixing bases. Connecting plates are clamped and connected in the installing grooves. The two ends of the connecting plates stretch out of the outer sides of the fixing bases and are connected with clamping plates in a clamped manner. The two ends, located on the outer sides of the clamping plates, of the connecting plates are provided with anti-disengaging bolts. The building template strengthening device is simple in structure, convenient to use, rapid in dismounting and mounting and high in practicability.
Owner:ZHEJIANG XINDONGYANG CONSTR GRP

Assembled type prefabricated outer wallboard structure and construction method

The invention relates to an assembled type prefabricated outer wallboard structure. The assembled type prefabricated outer wallboard structure mainly comprises a local layer outer wallboard, a lower layer outer wallboard, fixing assemblies, separated type angle steel, an L-shaped steel plate and horizontal U-shaped ribs; the lower layer outer wallboard permanent fixing assembly is arranged inside the lower layer outer wallboard and connected with the L-shaped steel plate in an anchoring mode; the outer wallboard top reserved horizontal U-shaped rib in the inner side of the top of the lower layer outer wallboard is connected with the edge beam reserved horizontal U-shaped rib in the end portion of a floor in a welding mode; the local layer outer wallboard and the lower layer outer wallboard are connected vertically through positioning pins; the local layer outer wallboard temporary fixing assembly 1 embedded in the local layer outer wallboard and the separated type angle steel are anchored; and post-filling fine aggregate concrete is poured into a defined space of the lower portion of the separated type angle steel. The assembled type prefabricated outer wallboard structure is high in mounting speed, and upper and lower prefabricated outer wallboards and a beam body are high in connection strength. The invention further provides a construction method of the assembled type prefabricated outer wallboard structure.
Owner:ANHUI TIANZHU CONSTR GRP
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