38results about How to "Guaranteed mechanical properties" patented technology

An electrical connector includes a body having a plurality of terminal holes and a plurality of terminals housed within corresponding terminal holes. The body has an upper surface and a lower surface, with the terminal holes penetrating both surfaces. Each terminal includes a first terminal piece and a second terminal piece, independent of each other. The first terminal piece includes a first fixing portion fixed to the body and a first elastic arm extending upward from the upper surface of the body. The first elastic arm has a chip contact portion and a first overlapping portion extending downward. The second terminal piece includes a second fixing portion fixed to the body and a second overlapping portion extending upward. When the first elastic arm is forced to move downward, it causes the first overlapping portion to move until the first overlapping portion contacts the second overlapping portion, forming a conductive path. The terminal of the present invention is composed of two independent terminal pieces and can form two conductive paths, improving high-frequency performance while ensuring mechanical performance.

The application relates to the technical field of zirconium-niobium alloy material processing, in particular to a preparation method of a large-diameter zirconium-niobium alloy pipe for nuclear industry, which comprises the following steps: S1, mixing nuclear-grade sponge zirconium and niobium scraps, or mixing zirconium-niobium alloy, zirconium dioxide and iron; melting the mixture and preparing a zirconium-niobium alloy ingot; S2, sequentially performing large deformation forging in a beta single-phase zone and an alpha+beta two-phase zone; S3, drilling a central hole in the axial direction of a round-forging blank; quenching in the beta single-phase zone; S4, coating an anti-galling agent on the surface of the central hole and heating to prepare a pipe blank in the mode of cross piercing; S5, performing periodic forging and rolling on the pipe blank; S6, annealing the hot-rolled pipe twice; and straightening the hot-rolled pipe after the second-stage annealing. The zirconium-niobium alloy pipe has uniform microstructure, good mechanical properties and corrosion resistance, the production direction of the brittle hydride is nearly parallel to the circumferential direction of the pipe, and brittle damage of the pipe wall thickness caused by the crack propagation of the hydride is avoided.

This utility model relates to the field of construction, specifically a steel plate connection structure for primary and secondary beams. The secondary steel-concrete composite beams are symmetrically arranged on both sides of the primary steel-concrete composite beam, forming a cross-shaped arrangement. The primary steel-concrete composite beam is horizontally fitted with upper and lower flange connecting plates, corresponding to the heights of the upper and lower pipe walls of the secondary steel-concrete composite beams, respectively. The two end faces of the upper and lower flange connecting plates support the upper and lower pipe walls of the secondary steel-concrete composite beams from bottom to top. This utility model significantly improves the construction efficiency of connecting primary and secondary beams and has a simple structure.

The invention belongs to the technical field of freight unmanned aerial vehicle delivery, and relates to an intelligent cabin door system for an unmanned aerial vehicle and a cabin door structure design method. The system comprises a driving system, a reel system, a curtain plate system, a sliding rail unit and a control unit. The control unit is electrically connected with the driving system; the driving system is arranged on the unmanned aerial vehicle body; the curtain plate system is connected with an unmanned aerial vehicle body through the sliding rail unit, the curtain plate system is connected with the reel system, the driving system is in transmission connection with the reel system through a chain wheel transmission structure, and the driving system drives the reel system to rotate so as to drive the curtain plate system to stretch or retract along the sliding rail unit. Opening and closing of the cabin door are realized. According to the invention, the number of moving parts is greatly reduced, the probability of clamping stagnation and wear failure of a mechanical transmission mechanism is fundamentally reduced, and the operation reliability of a cabin door system in harsh operation scenes such as emergency logistics and disaster rescue is remarkably improved.

This invention belongs to the field of composite material processing technology and discloses a trimming actuator, a trimming processing device, and a trimming processing method. The trimming actuator includes a side U-shaped housing, a milling assembly, and a transmission assembly. The main body of the side U-shaped housing extends vertically, and both ends are bent and extended horizontally to form an upper extension and a lower extension, which together form a receiving cavity. In the milling assembly, a first connecting shaft passes through the upper extension and is rotatably connected to it, with its upper end connected to a power spindle and its lower end connected to a first milling cutter. The lower end of a second connecting shaft is rotatably connected to the lower extension, and its upper end is connected to a second milling cutter. The first and second connecting shafts are coaxially arranged, and the first milling cutter is located above the second milling cutter, with their axes collinear. The rotation of the power spindle drives the first connecting shaft and the first milling cutter to rotate synchronously. The transmission assembly transmits the power of the first connecting shaft to the second connecting shaft, realizing the synchronous rotation of the first and second milling cutters and suppressing delamination and burr defects on the trimmed edges of the composite material.

The application discloses a low-temperature ion nitriding method and application. The low-temperature ion nitriding method comprises the following steps: under a selected temperature condition, ion etching treatment is performed on the surface of a workpiece by adopting an arc-enhanced glow discharge process, and then plasma nitriding treatment is performed on the workpiece by adopting an arc-enhanced plasma process to obtain a nitriding workpiece; wherein, a positive and negative alternating voltage is applied to the workpiece in the arc-enhanced plasma process. The low-temperature ion nitriding method provided by the application can realize nitriding at a lower temperature, effectively improves the deformation degree of the workpiece, and is widely applicable to surface strengthening of cutters, molds and metal parts.

This application discloses a composite photovoltaic ribbon and a photovoltaic module. The ribbon includes a ribbon substrate, which comprises an aluminum layer and a copper layer. The copper layer includes a first copper layer disposed on at least a portion of the outer peripheral surface of the aluminum layer. The mass ratio of the copper layer to the aluminum layer is 1:9 to 9:1, and the thickness of the first copper layer is greater than or equal to 2 μm. This application differs from the prior art in that it uses only copper as the ribbon substrate by adding an aluminum layer, reducing the amount of copper used and lowering the cost of the ribbon substrate. Furthermore, by limiting the mass ratio of the copper layer to the aluminum layer and the thickness of the copper layer, the electrical conductivity and mechanical properties of the ribbon substrate are ensured to meet requirements.

This invention discloses a sound-absorbing component, a sound-generating device, and an electronic device, relating to the field of acoustics. The sound-absorbing component includes a housing and sound-absorbing material filled within the housing. The housing includes a main body and a cover, with the main body defining an accommodating space. The sound-absorbing material is filled within the accommodating space and includes at least one of sound-absorbing particles and sound-absorbing powder. The sound-absorbing particles include multiple sound-absorbing powders and an adhesive that binds the multiple sound-absorbing powders together. The main body is formed into a porous structure composed of stacked fiber filaments. The tensile strength of the main body is 10N-80N, and the elongation at break is 1-60%. The housing of this invention effectively encapsulates the sound-absorbing material, and the main body has good tensile strength and elongation at break, making it less prone to breakage. This solves the problem of dust contamination caused by exposed sound-absorbing material and provides excellent acoustic improvement performance.

The application discloses a method and device for automatically scraping off the insulating layer of an enameled wire, and belongs to the field of mechanical processing. The method comprises the following steps: the enameled wire is passed through a guide sleeve and tightly pressed on an adjustable positioning block, so that the enameled wire is axially fixed; a driving power source is driven to continuously rotate a cam 5; through the rotation of the cam 5, a compound motion cycle is synchronously controlled to be executed by a scraper mechanism; the compound motion cycle is repeatedly executed, and is matched with the periodic rotation of the enameled wire until the insulating layer is completely scraped off. The application can efficiently and completely remove the insulating layer under the premise of guaranteeing zero damage to the wire base, and simultaneously meets the requirements of high reliability and simple operation.

The application provides a steel seamless pressure vessel quenching medium concentration determination method, comprising the following steps: S1, processing multiple end-quenching samples; S2, configuring multiple groups of water-based quenching agent solutions; S3, heating and heat-insulating the end-quenching samples, and contacting the test end face of the end-quenching samples with the water-based quenching agent solutions; S4, processing a detection face on the end-quenching samples, and measuring the hardness; S5, drawing a relationship curve between the distance from the test end face and the hardness value at the corresponding position, and obtaining the distance L of the hardness detection point corresponding to the hardness inflection point from the test end face; S6, drawing a relationship diagram of L and the water-based quenching agent solution concentration; and S7, based on the relationship diagram of S6, determining the water-based quenching agent concentration K during heat treatment quenching cooling of the pressure vessel with a nominal wall thickness H. The application solves the problems of multiple large furnace test times and inapplicability to different nominal wall thicknesses in the prior art, can quickly and effectively determine the quenching medium concentration, and effectively improves the safety and reliability of the pressure vessel use.

This invention provides an ultralight flame-retardant negative electrode current collector and its preparation method, which is prepared from raw materials comprising the following parts by weight: 20 parts polyimide powder; 60-70 parts copper-plated conductive carbon nanomaterials; 1-5 parts dispersant; and 10-15 parts flame retardant. The copper-plated conductive carbon nanomaterials are copper-plated conductive graphite and / or copper-plated carbon nanotubes. This invention provides an ultralight flame-retardant negative electrode current collector and its preparation method, using polyimide powder as a matrix, copper-plated conductive graphite and / or copper-plated carbon nanotubes as conductive fillers, and adding a flame retardant, which can effectively reduce the density of the current collector while ensuring its conductivity and safety performance.

This invention discloses a stress corrosion resistant non-magnetic stainless steel and its preparation method, belonging to the technical field of stainless steel materials. It solves one of the problems in existing technologies: the microstructure uniformity of non-magnetic stainless steel is difficult to control, and the mechanical properties and stress corrosion resistance of existing non-magnetic stainless steel cannot be simultaneously and effectively improved. The composition of the stress corrosion resistant non-magnetic stainless steel, by mass percentage, includes: 18.30% ≤ Cr < 21.00%, 1.10% ≤ Mo ≤ 1.40%, 2.60% ≤ Ni ≤ 3.0%, 20.50% < Mn ≤ 22.00%, Si ≤ 0.4%, 0.01% ≤ Nb ≤ 0.015%, P ≤ 0.025%, S ≤ 0.01%, C ≤ 0.02%, 0.76% ≤ N ≤ 0.80%, with the balance being Fe and other unavoidable impurities. The stress corrosion resistant non-magnetic stainless steel of this invention has fine and uniform grains, and excellent mechanical properties and stress corrosion resistance.

This invention relates to the field of metal surface strengthening technology and discloses a vapor deposition process for strengthening valve sealing surfaces, comprising: heating a valve substrate in a vacuum chamber; introducing a precursor gas to construct a vapor deposition environment; monitoring pressure fluctuation signals in the near-wall region of the sealing surface to determine the transient pressure drop rate; comparing the transient pressure drop rate with a pressure transition threshold to determine the vapor phase depletion stage and identify a low-collision-section region; applying a radio frequency negative bias voltage to the valve substrate during the vapor phase depletion stage to accelerate ions through the low-collision-section region, with ions impacting the crystal nuclei of the sealing surface with peak kinetic energy, inducing crystal dislocations. This invention utilizes the ballistic penetration mechanism of the vapor phase depletion interface to prevent ions from scattering in the vapor phase and achieve deep energy injection, suppressing the longitudinal growth of columnar crystals, forming an equiaxed crystal structure, and enhancing the density of the strengthening layer and the interfacial bonding force.

The utility model relates to a kind of assembled conductive copper bar structure, specifically a kind of assembled high load flow distribution's conductive copper bar structure, including assembling seat, two sides on the assembling seat are provided with slot, the side of the assembling seat is provided with fixed seat and the holding plate of the side of the fixed seat, copper bar body is provided between the assembling seat and fixed seat, adjusting mechanism and the limiting fastening mechanism for being used to the assembling of copper bar body are provided in the assembling seat, the adjusting mechanism is cooperated with the transmission mechanism of the side of the fixed seat, the utility model is inserted into the cooperation between the assembling seat and fixed seat, realize the way of inserting into to the superposition fixed of multilayer copper bar, need not be on copper bar hole for bolt fixed, effectively simplify installation and dismounting process, avoid the copper bar structure strength weakening and stress concentration problem possibly caused by hole simultaneously, guarantee the structural integrity and mechanical properties of copper bar.

The application relates to the technical field of carriers, and discloses a steering engine, a steering engine assembly and a carrier. The steering engine comprises a shell and at least two protective piece mounting structures, the at least two protective piece mounting structures are arranged on the outer wall of the shell in the axial direction of the shell, and each protective piece mounting structure is adapted to be connected with a protective piece. The protective piece mounting structure is arranged on the shell of the steering engine, the protective piece can be mounted on the shell by the protective piece mounting structure, so that the protective piece has a direct connection relationship with the steering engine body, and the protective piece can be adaptively adjusted according to the specific size and position of the steering engine, thereby improving the protection effect on the steering engine body.

The utility model relates to a battery technical field discloses a kind of battery cell structure and battery, including battery cell body, tab and fixed adhesive paper, tab is fixedly connected with battery cell body;Fixed adhesive paper is attached to the surface of battery cell body, fixed adhesive paper has empty portion, along the thickness direction of battery cell body, empty portion is oppositely arranged with tab;Along the thickness direction of battery cell body, the projection area of fixed adhesive paper is S, unit is mm 2 , the mass of battery cell body is M, unit is g, satisfy: S / M is greater than or equal to 15。Empty portion makes in the position of tab and battery cell body connection not to add the thickness of fixed adhesive paper, reduce the overall thickness of battery cell structure, improve the energy density of battery;In addition, the ratio of the projection area of fixed adhesive paper and the mass of battery cell body is greater than or equal to 15mm 2 / g, can avoid that the projection area of fixed adhesive paper is too small and make the adhesion between battery cell body and packaging shell too small, guarantee the mechanical property of battery when drum falls.

The invention relates to the technical field of casting machining, and discloses a casting die cavity inlet molten aluminum anti-oxidation device which comprises a heat preservation furnace arranged in a casting rack. A crucible used for storing molten aluminum is arranged in the heat preservation furnace, a furnace cover is assembled on the top of the heat preservation furnace, and a machine shell is fixedly connected to the top of the furnace cover. And the liquid lifting part serves as a conveying runner for connecting the crucible and the casting mold cavity and comprises an adjusting pipe which is rotationally connected to the interior of the furnace cover in a damping mode, a liquid lifting pipe extending into the crucible is assembled at the bottom of the adjusting pipe, and an adjusting piece used for adjusting the inner diameter of a liquid lifting channel in the adjusting pipe is arranged in the adjusting pipe. The anti-oxidation device for the molten aluminum at the inlet of the casting die cavity can effectively solve the problems that in the prior art, the structural parameters of the riser tube are designed in a fixed mode, only the molten aluminum flow requirement of a single-specification casting can be met, and the batch alternate production requirement of multi-specification castings is difficult to meet.

The application belongs to the technical field of wave-absorbing material coating, and particularly relates to an integrated wave-absorbing surface preparation method based on ultrafast laser processing, which realizes integrated preparation of nano wave-absorbing materials by introducing an ultrafast laser micro-nano processing technology. The application uses a spatially shaped femtosecond laser to process and modify a metal base in a liquid precursor environment, so that the ultrafast laser reduces the liquid precursor while processing and modifying the surface of the metal base, can effectively make the metal surface produce a closely combined nano structure layer containing magnetism without loss of surface mechanical properties, thereby improving the magnetic loss of the metal surface for microwaves, improving the wave-absorbing performance, and solving the problem of poor combination of the existing wave-absorbing coating and the base, which affects the wave-absorbing performance.

The utility model discloses a cooling device with self -cleaning structure for aluminium profile production relates to aluminium profile production technical field. The utility model discloses a bottom plate is provided with self -cleaning mechanism and cooling mechanism on the bottom plate, and the top fixedly connected with workstation of bottom plate, the round tank is opened in the workstation, and the inner wall fixedly connected with the baffle of workstation, the top rotationally connected with the pivot of workstation, and the bottom extension of pivot reaches in the round tank, and the outer wall fixedly connected with the turntable of pivot, and the outer wall fixedly connected with the limit box of turntable, and the rear side inner wall fixedly connected with spring telescopic link of limit box. The utility model discloses through setting self -cleaning mechanism, has solved the current aluminium profile production cooling device when using, because of not carrying out in time cleaning, after long -term use, the scale, oil dirt, dust and other impurities accumulated on the baffle, will be attached on it, thereby influence aluminium profile finished product quality's problem.

A kind of be applicable to double joint, three joint heat treatment water jacket water spraying structure device, including upper water jacket and lower water jacket, upper water jacket is located above lower water jacket;Upper water jacket includes upper template and several lower templates, and several lower templates are fixedly installed in the lower end of upper template, and the gap for placing hanging joint is left between several lower templates, and the facade of lower template towards gap is provided with several side drainage holes, and the lower surface of upper template is provided with several top drainage holes;Lower water jacket includes lower die box, and the inner surface of lower die box is provided with several lower water spraying holes, and the lower part of lower die box is provided with flow groove;The overall cooling effect of casting or forge piece is uniform, and the hardness uniformity of its surface is good;Avoid because of uneven water spraying creates product cooling effect uneven, finally leads to product hardness unqualified;The device well guarantees quenching layer depth and the mechanical property of material.

The application discloses a multifunctional outer cabin plate dot matrix structure for a satellite, which mainly comprises an inner cabin plate, an outer cabin plate, a side wall plate, a pre-embedded heat pipe, a rod-shaped regular tetrahedron dot matrix structure and a shear-resistant bearing rod, and a satellite single machine is installed on the inner cabin plate, and the outer cabin plate is directly contacted with a vacuum environment and serves as a heat dissipation plate. The pre-embedded heat pipes are all installed on the inner surface of the inner cabin plate, the pipe fin surface of the pre-embedded heat pipe is closely attached to the inner surface of the inner cabin plate, the contact area is increased, and the heat exchange efficiency is improved. The rod-shaped regular tetrahedron dot matrix structure has a whole regular tetrahedron appearance, and the unit cell structure is similar to a diamond single crystal. The rod-shaped regular tetrahedron dot matrix structure is adopted, a plurality of stable triangular structures are formed between the internal supporting arms of the dot matrix unit cell, the mechanical strength and the structural rigidity of the cabin plate are greatly enhanced, and the cabin plate load bearing capacity is improved. Meanwhile, the heat pipes can be pre-embedded in the gap of the dot matrix structure, and low-density and high-thermal-conductivity materials are filled in the blank part, so that the mechanical properties are ensured, and the heat conduction efficiency is improved.

This invention discloses a high-temperature resistant and electrolyte-resistant insulating powder coating and its preparation method, belonging to the field of powder coating technology. The high-temperature resistant and electrolyte-resistant insulating powder coating prepared by this invention comprises, by weight, 304-308 parts epoxy resin, 76-80 parts organosilicon epoxy resin, 100-102 parts curing agent, 0.7-1 parts accelerator, 2-5 parts leveling agent, 2-3 parts defoamer, 0.8-1 parts benzoin, and 10-20 parts composite filler. The organosilicon epoxy resin is obtained by reacting polymethylhydrosiloxane, unsaturated hindered amine, 2-(allyloxy)naphthalene, and unsaturated epoxy monomers. The composite filler is obtained by compounding hexagonal boron nitride with aluminum nitride modified by a silane coupling agent. The high-temperature resistant and electrolyte-resistant insulating powder coating prepared by this invention exhibits good high-temperature resistance, electrolyte resistance, thermal conductivity, and mechanical properties.

This invention relates to the field of titanium plate processing technology, specifically a titanium plate rolling equipment with an edge trimming function. It includes a rear support, a middle support, and a front support arranged sequentially. A front rolling roll and a rear rolling roll are rotatably mounted on the front and rear support, respectively. A processing seat is fixedly mounted on the top of the middle support, and a sliding groove is formed on the top of the middle support. A gantry frame is slidably mounted on the sliding groove, and a trimming mechanism for trimming the edges of the titanium plate is mounted on the gantry frame. A dust blower is fixedly mounted on the processing seat, and a dust collection box is provided on the middle support corresponding to the dust blower's outlet. Cooling atomizing mechanisms for pre-cooling the titanium plate are fixedly mounted on the front, middle, and rear support. This invention has a compact overall structure, is easy to operate, and is suitable for the high-quality, high-efficiency processing requirements of titanium plates in aerospace, chemical equipment, and other fields, possessing significant practical value and promising prospects for promotion.

This utility model relates to the field of medical device technology, specifically to a coil assembly and a medical device. The coil assembly includes at least one insulating plate and a coil attached to the insulating plate with adhesive. Each insulating plate has multiple through holes and multiple serpentine holes, which are staggered. The serpentine holes are arranged radially from the center of the area where the coil is located on the insulating plate. This application combines multiple through holes with multiple serpentine holes, and the serpentine holes are arranged radially from the center of the area where the coil is located on the insulating plate. The serpentine holes, through their meandering path, increase the space for adhesive within the limited space of the insulating plate, providing sufficient adhesive capacity. Simultaneously, they can disperse stress, avoiding significant stress concentration caused by the presence of holes, and have minimal impact on the overall hardness and structural strength of the insulating plate, thus ensuring the mechanical properties of the coil assembly.

This invention relates to the field of fiber preparation technology and discloses a highly efficient method for preparing flame-retardant monofilaments. The method includes: surface activation of a polyamide matrix using radio frequency plasma to directionally introduce carboxyl functional groups; surface grafting modification of a composite flame-retardant masterbatch using a silane coupling agent to construct an interfacial transition layer; controlling the moisture content of the raw materials using a microwave-airflow combined drying system; achieving a gradient distribution of the flame retardant using a dual-channel spinning assembly; synergistically dispersing the nano-reinforcing phase and the flame retardant to construct a three-dimensional network structure, and forming nascent monofilaments using the spinning assembly; controlling the crystal structure through two-stage stretching involving wetting pre-orientation and dry heat main orientation; and stabilizing the fiber structure using a segmented temperature-controlled thermal relaxation process to obtain a finished monofilament product with flame-retardant properties. This invention achieves efficient and continuous production of flame-retardant monofilaments through the synergistic effect of plasma activation, gradient spinning, and staged orientation.

The utility model discloses a composite flame -retardant epoxy resin board belongs to epoxy resin board technical field, including board main part, the board main part includes glass fiber resin base, one side of glass fiber resin base is pasted with the reinforcing layer, the other side of reinforcing layer is pasted with main flame -retardant layer, the other side of main flame -retardant layer is pasted with insulating flame -retardant layer, and glass fiber resin base, reinforcing layer, main flame -retardant layer and insulating flame -retardant layer are penetrated and fastened with fastening rivet, the outer wall of glass fiber resin base, reinforcing layer, main flame -retardant layer, insulating flame -retardant layer and fastening rivet is wrapped with organic silicon high temperature resistant paint layer. Through the setting of multilayer composite flame -retardant structure, make the glass fiber resin board give consideration to high -efficient flame -retardant efficiency simultaneously, ensure its mechanical property, set up array type anchoring structure simultaneously, effectively avoid the multilayer composite structure of its delamination situation appears because of high temperature, improve its high temperature state board body's stability.

The present invention relates to an assembly of a vehicle wheel (1) and a caliper brake (2), wherein the wheel includes a rim (1.1), a hub section (1.3), and at least one spoke (1.2) connecting the hub section to the rim, and the caliper brake includes a brake disc (2.2) having an arched brake disc retaining drum (2.3), a brake caliper (2.1) having a caliper housing surrounding the brake disc, and at least one brake piston assembly disposed in the housing of the brake caliper, which is configured to transmit clamping force to the brake disc by means of at least one brake piston, wherein the at least one brake piston assembly is disposed in the side of the caliper housing facing the vehicle interior when the brake is installed in the vehicle, the brake disc retaining drum is connected to the hub of the wheel, and, when viewed in the vehicle installation state and along the axial direction of the wheel, the arched portion of the brake disc retaining drum is oriented toward the vehicle interior.

The application belongs to the technical field of textile fabric function modification, and discloses a wear-resistant and ultraviolet-resistant fabric and a preparation method thereof.The fabric is formed by interweaving warp yarns and weft yarns to form a fabric base material, the fiber surface of the fabric base material is covalently grafted with a wear-resistant and ultraviolet-resistant composite functional layer, the warp yarns are super high molecular weight polyethylene and graphene composite modified fibers, the weft yarns are core-spun yarns with high-strength polyester fibers as the core layer and cotton fibers as the skin layer, and the wear-resistant and ultraviolet-resistant composite functional layer is a resin layer formed by covalent grafting and crosslinking of graphene core-zinc oxide shell nanoparticles modified by gamma-methacryloxypropyl trimethoxysilane and an anionic waterborne polyurethane containing an unsaturated carbon-carbon double bond at the end.The application effectively improves the bonding force of the functional layer and the base material, enhances the wash-resistant stability of the fabric function, and takes into account the wear-resistant and ultraviolet-resistant performance and the wearing comfort of the fabric, and can be widely applied in the fields of outdoor work clothes, sportswear and the like.