84results about How to "Moderate stiffness" patented technology

The invention relates to copper-based powder dispersion ceramic as well as a preparation method and application thereof, and relates to the field of ceramic materials. The copper-based powder dispersion ceramic is prepared from an anti-abrasion constituent element as one of the raw materials, wherein the anti-abrasion constituent element comprises the following components by mass percent of all the raw materials: 1-5 percent of diamond powder and 1-5 percent of titanium diboride powder. The copper-based powder dispersion ceramic is high in impact pressure resistance, high in mechanical intensity, high in friction and abrasion resistance, long in service life, high in heat dissipation property and heat recovery property, high in high-temperature and low-temperature resistance, high in acid, alkaline, oil, water and the like corrosion resistance and the like.

The invention discloses a manufacturing technology of a glass fiber/epoxy resin composite material substrate type fiber bragg grating sensor. The manufacturing technology comprises the steps that glass fiber/epoxy resin prepreg is procured to prepare a glass fiber/epoxy resin composite material substrate; a fiber bragg grating is fixed to the glass fiber/epoxy resin composite material substrate; the glass fiber/epoxy resin composite material substrate fixed with the fiber bragg grating is covered with a dry-state glass fiber cloth, vacuum aided filling of liquid epoxy resin is performed, and secondary curing molding is performed. The manufacturing technology adopts the secondary curing molding in the packaging process, the interlayer interface strength is remarkably improved, accordingly the testing precision and stability of the fiber bragg grating sensor are improved, batch production of the fiber bragg grating sensor can be achieved, and the manufacturing technology has wide market prospect and huge economic benefit.

The invention provides a universal curved-surface clamp which comprises an upper clamping part and a lower clamping part, wherein a lifting part is arranged between the upper clamping part and the lower clamping part and is used for adjusting the distance between the upper clamping part and the lower clamping part, and a workpiece to be processed is arranged between the upper clamping part and thelower clamping part; a plurality of clamping bars are arranged on the upper clamping part and the lower clamping part, and the clamping bars of the upper clamping part correspond to the clamping barsof the lower clamping part; the clamping bars are correspondingly provided with elastic components; and a clamping curved surface corresponding to the workpiece to be processed is formed between theclamping bars of the upper clamping part and the lower clamping part, through the elastic components. The spring stiffness of the universal curved-surface clamp is moderate, the pretightening force issmall and does not damage the workpiece, and the flexible clamping is realized.

The invention belongs to the technical field of structure engineering and relates to a high-strength concrete composite shear wall with built-in segmented steel plates and a construction method for the same. The invention provides the high-strength concrete composite shear wall with the built-in segmented steel plates and further provides the building and construction method for the shear wall. The composite shear wall and the construction method for the same provided by the invention are characterized in that through segmented layout of the steel plate, concrete pouring and binding bar layout become convenient; a cooperative working ability of the steel plates and concrete is enhanced; bearing force is ensured; and deformability and an energy-dissipation capability of the composite shear wall can also be enhanced. In comparison with a composite shear wall covered by steel plates, the composite shear wall provided by the invention has higher resistance to high temperatures and can show better performance when a fire disaster takes place. Meanwhile, in comparison with a concrete composite shear wall with a whole steel plate, the shear wall provided by the invention has the advantages that conversion and transition among layers can be implemented through reduction of the quantity of the segmented steel plates; inter-layer rigidity transition becomes gentler; and the structure is also simpler.

The invention discloses a bamboo glue sleeper and a preparation method thereof. The preparation method comprises the following steps: (1) selecting a raw material; (2) cutting off the raw material according to a specified length, sectioning the cut-off raw material into strips, removing tabasheer and the bamboo outer skin, and processing the strips into thin bamboo skin pieces; (3) carrying out carbonization treatment on the thin bamboo skin pieces obtained in the step (2); (4) grinding the carbonized thin bamboo skin pieces into a siamesed fiber state; (5) putting the material obtained in the step (4) in phenol glue to carry out pressurization gumming; (6) carrying out automatic dehumidification on the material obtained in the step (5); (7) pressing and curing the material obtained in the step (6) into a slab; and (8) sawing the periphery width of the slab by 5 cm to eliminate the fringe effect during compression. The bamboo glue sleeper is low in carbon emission, environment-friendly and safe, does not deform when being affected with damp due to water, and is antiseptic, prevented from damage by worms, antiflaming and suitable for being used under a complex condition.

The invention discloses a multi-jaw active conformal ablation needle with a function of magnetic control and belongs to the technical field of medical care equipment. The multi-jaw conformal ablationneedle comprises flexible ablation electrodes, electromagnetic coils, a main needle and a magnetic part, wherein the number of the flexible ablation electrodes and the electromagnetic coils is N whichis more than or equal to 2; the N flexible ablation electrodes are circumferentially distributed around the main needle; each electromagnetic coil winds around the respective flexible ablation electrode; and the magnetic part is fixed on the main needle. When the multi-jaw active conformal ablation needle works, the strength and direction of a magnetic field formed around each electromagnetic coil by controlling the strength and direction of the current in the electromagnetic coil, the strength and direction of the magnetic force between the electromagnetic coils and the magnetic part can becontrolled, and the electromagnetic coils carrying the flexible ablation electrodes can be close to the main needle, or far away from the main needle or remained stable; and therefore, the motion locus of the multi-jaw active conformal ablation needle can be controlled, and the technical problem that the motion locus cannot be controlled in the prior art can be solved.

The invention discloses a wire rod for a CO2 gas shielded welding wire with tensile strength of 650MPa for a coating-free weathering steel bridge, and belongs to the field of weathering steel weldingmaterials. The wire rod comprises the following chemical components in percentage by mass: 0.04 to 0.09 percent of C, 0.55 to 0.85 percent of Si, 1.70 to 2.10 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, 0.46 to 0.65 percent of Cr, 1.10 to 1.80 percent of Ni, 0.15 to 0.38 percent of Cu, 0.10 to 0.20 percent of Ti, 0.003 to 0.005 percent of B, less than or equal to 0.015 percent of Al, less than or equal to 0.045 percent of Zr, less than or equal to 0.030 percent of Ce, less than or equal to 0.050 percent of O, less than or equal to 0.070 percent of N, and the balance of Fe and inevitable impurities. The invention also discloses the CO2 gas shielded welding wire with the tensile strength of 650MPa for the coating-free weathering steel bridge, which is prepared by drawing the wire rod. The welding wire is used for welding coating-free weathering steel with the tensile strength of 650MPa, wherein the tensile strength of deposited metalis between 650MPa and 730MPa, and the welding wire has high crack resistance; and the yield strength is more than or equal to 500MPa, the elongation is more than or equal to 23 percent, and the low-temperature impact energy KV2 at the temperature of -40 DEG C is more than or equal to 60J.

The invention discloses an anti-buckling low-frequency vibration isolation rubber support comprising a rubber support body and anti-seismic casing pipes arranged in the rubber support body. Laminatedrubber is adopted for the rubber support body. The low rigidity required by low-frequency vibration isolation is achieved by increasing the thickness of the rubber. The anti-seismic casing pipes are embedded in the support in the vertical direction and sequentially penetrate through the rubber support body from top to bottom, a restraining effect is achieved for the high-flexibility rubber supportbody in the horizontal direction, an anti-buckling function is provided for the rubber support body under the vertical large-load effect, and a horizontal earthquake resistance function is also provided for the support. Rubber layers or isolation gaps are arranged between the anti-seismic casing pipes and the rubber support body or between the anti-seismic casing pipes to avoid rigid contact, andthe environment vibration spreading route achieved through a rigid contact face is isolated. By means of the anti-buckling low-frequency vibration isolation rubber support, low-frequency vibration isolation of environment vibration can be achieved, high bearing stability and anti-seismic capacity can also be ensured, and the anti-buckling low-frequency vibration isolation rubber support can be used for vibration isolation of civil engineering structures and all types of instruments and equipment.

This invention provides new above knee (AK) and below the knee (BK) orthotic devices and implements specific manufacturing processes for the production of orthotic devices through the automated, computer controlled bi-axial and tri-axial braiding of orthotic devices, over a mold or mandrel made of carved foam, plaster material or wax that is a replica of the patient's limb, and is created by a Computer Aided Design (CAD) file controlling a Numerically Controlled (CNC) machine tool. This method of manufacture using aerospace fibers such as graphite or Kevlar, and high performance resins, is used to create a orthotic device which is stronger and lighter weight than conventionally manufactured orthotic devices. Braiding also allows incorporation of woven cloth, tapes and other reinforcements into the braiding process for added strength at selected areas. The method dramatically decreases the production time and cost of the relative to conventional methods.

The invention relates to a method for manufacturing a fixing heating roller coated with teflon film silastic, comprising the following steps of: firstly, sheathing a fluorin jacket on the peripheral surface of an aluminium tube, and then infusing a silica gel layer between the aluminium tube and the fluorin jacket. The fluorin jacket is made of tubular teflon films. The invention has the advantages of simpler process, simple equipment, easy operation and low cost; and the manufactured fixing heating roller has high chemical stability and is suitable for high-speed printers and copiers.

The invention discloses an automatic test device used for testing the uniformity of an antenna radiation field. The device comprises a regular geometric frame and a support bar separated from the geometric frame. The geometric frame is provided with a number of positioning bars capable of moving along the inner frame of the geometric frame. Each positioning bar is directed to the center of the geometric frame and is capable of telescoping. One end of the support bar is perpendicular to the cross section of the geometric frame and is directed to the center of the geometric frame. Probes are used for testing the antenna radiation field are arranged on one end of the support bar and the positioning bars. The automatic test device provided by the invention has the advantages of clever design, simple structure, easy operation, convenient use, low cost of making and maintaining, outstanding substantive characteristics and remarkable progress, and is suitable for large-scale application in the fields of antenna measurement and electromagnetic waves.

The invention relates to a flexible steel strand cage of an underground diaphragm wall self-adaptive to trough deflection. The flexible steel strand cage comprises steel strands, a plurality of steel strand positioning discs and X-type diagonal draw steel bars. Steel strand perforated holes are formed in the plurality of steel strand positioning discs, and a group of steel strands vertically penetrate through the plurality of steel strand positioning discs in a spaced manner; a counterweight is fixed on the bottom steel strand positioning disc, and a clamp for clamping and locking the steel strands is arranged on the top steel strand positioning disc; and the X-type diagonal draw steel bars are fixed on two side faces between adjacent steel strand positioning discs. By replacing a conventional reinforcement cage which is relatively great in rigidity with the flexible steel strand cage, deflection of the trough can be self-adapted. Compared with a conventional trough deflection treatment mode, the flexible steel strand cage provided by the invention can quickly and economically treat the deflection problem; and the flexible steel strand cage can reach proper rigidity as needed.

The invention discloses a volume-variable air spring auxiliary air chamber, and relates to the technical field of automobile air spring auxiliary air chambers. The volume-variable air spring auxiliaryair chamber mainly comprises a first-stage air chamber body, a second-stage air chamber and a third-stage air chamber body and further comprises a connecting pipeline connected with a main air chamber body, a top cover, a separation plate, a ratchet wheel, a rotary disc, a ratchet wheel shaft and the like. According to the auxiliary air chamber, changing of the volume of the auxiliary air chambercan be achieved by controlling rotation of the rotary disc, and a driving mechanism drives the ratchet wheel shaft to rotate. The ratchet wheel on the ratchet wheel shaft rotates through the ratchetwheel shaft to interact with a pawl on the rotary disc, and then the rotary disc is driven to do circling motion. When a hole in the rotary disc is coaxial with a hole in a separation plate, the effective volume of the auxiliary air chamber changes, the rigidity of an air spring system is finally changed to meet various running working conditions of a vehicle, and the aim of improving the comprehensive performance of an air suspension system is achieved.

A method for cleaving wafers comprising the following steps: providing a slice of a crystalline material with at least a first plane side, providing at least one stressing means to be attached to said slice, wherein said at least one stressing means is at least in parts made of a material with a coefficient of thermal expansion different from that of the slice, attaching said stressing means to said first plane side of said slice to form a stack, inducing a thermal shear stress to said slice by applying a temperature change to said stack.

The invention relates to a sound pressure sensor, and relates to the technical field of acoustoelectric sensing. According to the main technical scheme, the sound pressure sensor comprises a substrate, an induction layer and an elastic layer, wherein the first end of the substrate is provided with a concave space towards the opposite second end; the induction layer and the elastic layer are arranged in a stacked mode, and the induction layer covers the first end of the substrate and is connected with the substrate; the induction layer is uniformly divided into two or more sub-induction layersby taking a central point as a starting division point, and a preset distance is formed between every two adjacent sub-induction layers; and the induction layer can drive the elastic layer to deform towards the concave space of the substrate when being subjected to the pressure of sound waves and convert acoustic wave signals into electric signals. The sound pressure sensor solves the problem thata sound pressure sensor in the prior art is insufficient in sensitivity.

The invention provides a loudspeaker inner core, which comprises a first frame, a first vibrating diaphragm and a first piezoelectric piece, wherein the first vibrating diaphragm comprises a middle part and an edge part surrounding the middle part; the edge part is mounted on the first frame; the first piezoelectric part is fixed on the surface, facing the first frame, of the middle part or the surface, deviating from the first frame, of the middle part; and the edge part is made of aluminum, aluminum magnesium alloy or magnesium aluminum alloy. When the loudspeaker inner core disclosed by the invention works, the edge part made of aluminum, aluminum-magnesium alloy or magnesium-aluminum alloy is moderate in rigidity and small in density, so that the vibration amplitude of the first vibrating diaphragm under the driving of the first piezoelectric piece can be effectively increased, the low-frequency sensitivity of the loudspeaker core is improved, the low-frequency frequency response of the loudspeaker core is improved, and the audio performance of the loudspeaker inner core is improved. The invention further provides a loudspeaker module and electronic equipment.