24results about How to "Avoid debonding" patented technology

The invention relates to a modified epoxy resin adhesive and a preparation method thereof, and belongs to the technical field of high polymer materials. The modified epoxy resin adhesive comprises the following components in parts by weight: 90-120 parts of epoxy resin, 8-25 parts of a curing agent, 1-3 parts of a diluent, 0.5-5 parts of a curing accelerator, 4-18 parts of graphite, 1-4 parts of a modified flexibilizer and 10-30 parts of nano diamond / boron nitride (PDA), a polyurethane single soft and hard segment structure and a high-temperature-resistant oxazolidinone ring in the modified toughening agent cooperate with poly (p-phenylene ether sulfone) resin, so that the toughness is effectively enhanced, and crack propagation is inhibited; boron nitride is modified by nano-diamond, wear resistance is optimized, good electric insulativity and chemical corrosion resistance are given to a matrix, polydopamine can promote a compound to be evenly dispersed in the epoxy resin matrix, wear resistance and adhesive force are improved, and the prepared modified epoxy resin adhesive has good toughening and wear-resisting effects and also has the advantages of being good in toughness, good in toughness and good in wear resistance. And the cable also has excellent high temperature resistance, corrosion resistance and electric insulation effects.

The invention relates to a method for treating an interface between a resin-based composite material and an aviation alloy. The method comprises the following steps: firstly, processing a micro inverted taper hole in a to-be-bonded surface of an alloy, then carrying out surface treatment, then coating a thermoplastic elastic adhesive on the to-be-bonded surface, putting the to-be-bonded surface into a vacuum oven for treatment, taking out the to-be-bonded surface, and carrying out heating, pressurizing and co-curing with a composite material. The micro inverted cone hole can remarkably increase the bonding area of the resin-based composite material and the alloy, and the inverted cone structure can effectively prevent debonding caused by mismatching of thermal expansion coefficients of an adhesive and a metal interface in the temperature change process; the thermal expansion coefficient of the thermoplastic elastic adhesive is between the thermal expansion coefficient of the resin-based composite material and the thermal expansion coefficient of the alloy material, the thermoplastic elastic adhesive has certain flexibility, a buffer layer is formed between the fiber-reinforced resin-based composite material and an alloy interface through the adhesive, and the probability that in the cooling process of the fiber-reinforced resin-based composite material and the alloy, the thermal expansion coefficient of the fiber-reinforced resin-based composite material and the alloy is lowered can be effectively lowered. And the interface thermal residual stress is caused due to the large difference between the thermal expansion coefficients of the two.

The invention relates to the technical field of battery boxes, discloses a lightweight composite material battery box lower box body and a forming method thereof, and relates to a typical structure design scheme and a forming process scheme of a composite material battery box. The lower box body of the battery box comprises connecting piece points such as a water cooling plate, a module and other inserts and components such as a lifting lug and a box body, thermal expansion foam prepreg serves as an internal expansion source, and the battery box is integrally formed through a thermal expansion mold pressing process. The whole lower box body is of a web-reinforced foam sandwich structure, and the strength and rigidity of the lower box body structure of the battery box can be improved through the web structure design in the light foam core, so that the mechanical property requirements of extrusion, bottom impact and the like of the battery box are met.

The invention relates to a plastic inner container of a carbon fiber reinforced composite material hydrogen storage bottle formed through rotational molding and a preparation method of the plastic inner container. The inner container comprises a plastic inner container body and a metal insert located at the end of the plastic inner container body. The plastic inner container body and the metal insert are integrally formed at a time through a rotational molding process. Compared with a traditional injection molding method, rotational molding is adopted, so that integral one-time molding of the plastic inner container barrel section can be achieved, and the defects of air leakage and insufficient strength at the welding position are overcome; according to rotational molding, overall one-time forming of the plastic inner container barrel section is achieved, meanwhile, non-glue synchronous connection of the metal insert in the inner container forming process can be achieved, the problems of insufficient air tightness and debonding easily occurring in secondary glue connection are solved, a mechanical interlocking structure is formed by the inner container and the metal insert, and connection is stable and firm.

The invention relates to the technical field of material bonding characteristic testing, in particular to a composite heterogeneous charging structure and a heterogeneous interface peel strength testing method thereof. The composite heterogeneous charging structure comprises a press-fitting structure and a pouring structure, a bonding interface is arranged between the press-fitting structure and the pouring structure, and the bonding interface is formed in the pouring and curing process of the pouring structure. The low bonding strength and peel strength testing method provided by the invention is suitable for accurate characterization of weak interface bonding performance of fragile materials, energetic materials and the like. According to the method, a traditional mechanical testing method is improved, a universal material testing machine is used for carrying out peel strength testing, and quantitative evaluation and failure mode analysis of the bonding strength of the heterogeneous interface are achieved. The method solves the problem that the conventional method is difficult to accurately measure the bonding characteristic determination and brittleness failure behavior of the low-bonding-strength interface, and can be widely applied to the fields of safety evaluation, reliability test and the like of energetic materials.

The present application relates to the field of composite pipe welding forming process, and particularly relates to a bimetallic composite pipe welding forming process. The scheme forms a transition layer in the form of laser cladding and flame spray welding before root welding of the base layer and welding of the composite layer, forms a continuous interface functional layer before welding, covers the bottom, sidewall and step corner of the groove. Compared with the partial transition layer prepared at the bottom of the groove in the prior art, the scheme can form a continuous protection along the groove interface, the isolation range is more complete, the channels for Fe / C migration from the bottom, the sidewall of the groove and the interface step to the composite layer are covered; the transition layer takes into account isolation, strengthening and subsequent welding fusion quality, and serves as an isolation and metallurgical control layer in the subsequent welding thermal cycle. The transition layer can be well metallurgically combined with the base layer and the composite layer, the subsequent base layer and composite layer welds can be formed by adhering to the stable bonding surface, layer peeling and debonding in operation is avoided, and the overall structural stability of the composite pipe is improved.

This invention relates to a high-temperature resistant adhesive suitable for bonding inert metals and its preparation method. It addresses the problems of low bond strength, poor bonding reliability under impact, and insufficient heat resistance in existing polyimide adhesives used for bonding titanium alloys or stainless steel. The high-temperature resistant adhesive is prepared from a polyimide precursor resin containing active metal complexes, a phthalate coupling agent, an inorganic filler, and solvent I. The preparation method includes: 1. Preparing the polyimide precursor resin containing active metal complexes; 2. Weighing; 3. Preparing the adhesive. This invention relates to a high-temperature resistant adhesive suitable for bonding inert metals and its preparation method.

The invention provides a spacecraft engine support and a design method thereof, and belongs to the technical field of spacecraft structure design. The spacecraft engine support is a combined support and comprises a plurality of thin-shell polyhedral carbon fiber composite material single supports which are independent of one another, and a first single support for installing a main engine serves as a main body support. And the other second to sixth monomer brackets are mounted on the main body bracket and are combined and connected in a manner of mutually gluing and screwing inclined surfaces of the polyhedrons to form the thin-shell polyhedral carbon fiber composite material combined bracket in a complex shape. The combined bracket provides a connecting interface with a spacecraft cabin through a main body bracket for mounting a main engine, and also provides mounting interfaces for a plurality of space layout engines and a large air cylinder outside the cabin. The invention has the advantages of strong adaptability to complex interfaces and large temperature difference environment, good pointing stability and light weight, and provides installation interfaces of multiple groups of main engines and attitude control engines which are intensively installed on the outer side for a light-weight lander cabin.

The application discloses an anti-white-spot optical coating and a preparation method thereof, and relates to the technical field of coating, which comprises a resin matrix and functional particles dispersed in the resin matrix, the particle size of the functional particles is 5-10 microns, the reflectivity of the optical coating is greater than or equal to 95% at a wavelength of 550 nm, the coating adhesion reaches 5B level according to the hundred-grid method, the coating pencil hardness is greater than or equal to B level, and the optical coating is free of white spots after being tested and lightened. The anti-white-spot optical coating and the preparation method thereof adopt a high-toughness and high-adhesion glue resin system as the resin matrix, and select the functional particles with a particle size of 5-10 microns, the interface bonding force between the functional particles and the resin matrix is optimized, the functional particles are uniformly dispersed in the resin matrix and form stable interface bonding, stress concentration and interface debonding are effectively avoided, and the generation of white spots is inhibited from the root. After testing, the coating is free of white spots when being lightened, and the anti-white-spot reliability of the coating is remarkably improved.

The invention provides a bonding method of a polyurethane adhesive for organic glass. According to the method, polishing and cleaning, prime coat coating, bonding and curing conditions of a bonding base material are stipulated; meanwhile, the invention further provides a tensile shear strength sample of the polyurethane adhesive for the organic glass, the sample adopts a structure with a steel sheet bottom plate and a compensation cushion block, the test failure caused by the fact that the organic glass sample is damaged before the adhesive layer is damaged is prevented, and further, the tensile shear strength of the polyurethane adhesive for the organic glass is further improved. The loading force line and the center line of the sample are kept consistent through size design, so that the sample is only subjected to shearing force in the stretching process, and the test accuracy is improved; the method is suitable for gluing between the organic glass and the composite material, between the organic glass and the organic glass and preparation of a tensile shear strength sample of the polyurethane adhesive for the organic glass.

The application belongs to the technical field of lithium batteries, and specifically discloses a high-temperature safety bottom-coated positive electrode current collector and application thereof in preparation of lithium batteries, which comprises a positive electrode aluminum foil and a bottom coating layer arranged on the surface of the positive electrode aluminum foil, the bottom coating layer is obtained by coating and curing of a bottom coating slurry, and the bottom coating slurry comprises aminopropylsilazane, silanized boehmite and hydroxylated boron nitride nanosheet; the aminopropylsilazane is prepared by condensation reaction of methylvinyl polysilazane and gamma-aminopropyl triethoxysilane; the silanized boehmite is prepared by reaction of boehmite and gamma-aminopropyl triethoxysilane; and the hydroxylated boron nitride nanosheet is prepared by hydroxyl treatment of hexagonal boron nitride powder. The surface group matching and in-plane orientation intercalation design of the aminopropylsilazane, the silanized boehmite and the hydroxylated boron nitride nanosheet make the bottom-coated positive electrode current collector have excellent interface bonding force, realize the unity of in-plane rapid heat dissipation and high-temperature structural locking, and the like.

The application discloses a cutting device for metal-clad pipe production and belongs to the technical field of metal-clad pipe production, which comprises a machine body, a moving seat arranged at the lower side of the inside of the machine body, a cutting part arranged at the inner upper side of the moving seat, a fixed cylinder fixedly connected to the left side of the machine body, first sliding grooves arranged at the front and back sides of the left end of the fixed cylinder, first sliding blocks slidingly connected to the inside of the first sliding grooves, and a moving frame fixedly connected to the left sides of the two first sliding blocks. The moving frame is arranged to adjust the positions of the first cutting part and the second cutting part under the pushing of the first electric push rod. Since the clad layer is first stripped during the cutting process of the metal-clad pipe, the laser is prevented from directly irradiating the stripped adhesive layer and metal mesh layer, heat degradation and interlayer shear stress are prevented, thereby realizing the layered cutting of "first mechanically cutting the clad layer and then laser cutting the base layer" and inhibiting the damage of the heat affected zone to the intermediate adhesive layer.

The invention belongs to the technical field of polyvinyl alcohol materials, and particularly relates to a modified polyvinyl alcohol composite material as well as a preparation method and application thereof. The modified polyvinyl alcohol composite material provided by the invention comprises p-formylbenzoic acid modified polyvinyl alcohol and melamine borate, the p-formylbenzoic acid modified polyvinyl alcohol is obtained by carrying out aldolization reaction on polyvinyl alcohol and p-formylbenzoic acid, and the molar ratio of the polyvinyl alcohol to the p-formylbenzoic acid is 1: (0.05-0.40); the mass percentage content of melamine borate in the modified polyvinyl alcohol composite material is 1-30%. The modified polyvinyl alcohol composite material provided by the invention has good mechanical properties in a high-humidity environment, overcomes the problem of insufficient mechanical strength caused by low crystallinity of an existing polyvinyl alcohol-based material, and expands the application range of the modified polyvinyl alcohol composite material.

The invention relates to an FRP sleeve prestress device for reinforcing a reinforced concrete column and a construction method, and belongs to the technical field of construction of civil buildings, bridge engineering, ancient buildings, water supply and drainage engineering and the like. When the FRP sleeve method is adopted for reinforcement, the high-strength characteristic of the FRP material can be exerted only by applying prestress, and the utilization efficiency of the material is improved. The FRP sleeve is made of an FRP coiled material, circumferential prestress is applied to the whole FRP sleeve through a mechanism located in the sleeve, and ultra-high performance concrete is poured on the inner side of the FRP sleeve. The FRP sleeve is simple in appearance, durable and attractive after being reinforced, and the FRP sleeve is not provided with external connecting pieces such as a clamp and an anchorage device and is also not provided with butt joints, so that the durability of internal concrete is ensured. The construction does not need large tensioning equipment, and the operation is simple. The FRP sleeve manufactured in the scheme is integrated, the bearing capacity of the reinforced concrete column after reinforcement can be greatly improved, workers with special skills are not needed, and cost is saved.

The application discloses a continuous fiber 3D printing dynamic regulation device and method based on force vision fusion, which comprises a six-degree-of-freedom industrial robot arm, a multi-dimensional force sensing device connected to the flange at the end of the six-degree-of-freedom industrial robot arm, and a rigid connection support connected to the lower end of the multi-dimensional force sensing device; an active feeding mechanism is installed on the rigid connection support, and a continuous fiber printing nozzle is connected to the lower part of the active feeding mechanism through a compliant floating mechanism; a non-contact topography scanning device is installed on one side of the rigid connection support or the continuous fiber printing nozzle; a multi-modal fusion dynamic regulation unit is in communication connection with the controller of the six-degree-of-freedom industrial robot arm, the active feeding mechanism, the compliant floating mechanism and each sensor respectively. The application realizes full-process closed-loop control of fiber tension, compaction quality and geometric accuracy, and significantly improves the accuracy and adaptability of complex curved surface printing.

The application discloses a glass fiber reinforced polypropylene material, a preparation method and application, and belongs to the technical field of polypropylene engineering plastics. The material contains, in terms of weight parts, 40-70 parts of polypropylene resin, 20-50 parts of alkali-free continuous long glass fiber, and compounded antioxidants, compatibilizers, scratch-resistant agents, heat-resistant agents and light stabilizers. The alkali-free continuous long glass fiber has a diameter of 10-14 microns, a breaking strength of greater than or equal to 3000 MPa, and a linear density of 2400 tex or 3600 tex. The material has high strength, aging resistance and low-temperature impact resistance, and is suitable for automobile structural parts.

The utility model relates to the technical field of dies, in particular to a nail tooth metal shell heat insulation forming die. According to the technical scheme, the forming die comprises a forming core die, a forming male die, a forming female die, a heat insulation layer, a forming cylinder and a metal shell, the forming male die is used for forming the inner shape size of the heat insulation layer and is matched with the forming core die and the forming female die through positioning holes or positioning pins, and the forming female die is used for restraining the forming cylinder and preventing the metal shell from deforming in the forming process; and the heat insulation layer is pre-formed into a step-shaped structure matched with the forming core mold and is bonded with the metal shell through an integral forming process. According to the utility model, the constraint of the forming cylinder on the outer side of the shell is increased, the forming process is simplified, the processing steps are reduced, the production efficiency is obviously improved, and compared with the traditional process, the heat insulation forming of the metal shell can be completed in a shorter time, and the production cost is reduced.

This invention belongs to the field of soundproof glass processing technology, specifically relating to a multi-layer laminated soundproof glass and its lamination process. The multi-layer laminated soundproof glass is composed of multiple layers of glass sheets alternately laminated with sound-insulating films. The thickness of the glass sheets gradually increases from the outside to the inside, with a thickness difference of at least 1 mm between adjacent glass sheets. The sound-insulating film gradually increases in damping from the outside to the inside, forming a gradient damping structure. For 3-layer or 4-layer glass structures, materials such as PVB film, SGP ionic interlayer film, and modified butyl rubber sound-insulating film with corresponding layer numbers are selected. The lamination process employs segmented temperature and pressure controlled curing and stepped gradient slow cooling. This invention effectively staggers the resonance peaks of each glass layer, solving defects such as residual bubbles, interlayer misalignment, and stress cracking in existing processes. The resulting product has a weighted sound insulation Rw of 38-45 dB, a yield rate >98%, and is controllable, highly versatile, and suitable for industrial mass production in high-end buildings and quiet environments.

This invention proposes a sea urchin-like calcium carbonate core-shell structure phase change energy storage microcapsule and its preparation method, belonging to the field of phase change energy storage materials and microcapsule preparation technology. The method includes the following steps: heating the phase change core material to a molten state, adding deionized water, then adding an emulsifier, and stirring thoroughly to obtain an oil-phase core material emulsion; dissolving calcium salt in deionized water, then adding magnesium salt, and stirring evenly to obtain a magnesium-calcium source suspension; mixing the oil-phase core material emulsion and the magnesium-calcium source suspension, heating, adding carbon source, and continuously stirring; after static aging, washing, and drying, the product is obtained. This invention utilizes the synergistic effect of high-temperature carbonation and ion induction to grow needle-like aragonite crystals in situ on the core material surface, achieving a strong mechanical interlock between the microcapsule and the substrate. This solves the problem that existing calcium carbonate-based phase change microcapsules typically exhibit a smooth calcite crystal form, leading to weak interfacial bonding with building substrates, easy debonding, and consequently weakening the mechanical strength of the composite material.

The invention provides a helicopter torque arm square arm assembly gluing device and method.The device comprises a base 1, a supporting plate 2, a positioning bush 3, a pressing bush 4, a pressing nut 5, a pressing bolt 6, a first sealing gasket 7, a second sealing gasket 8, a gluing core rod 9 and a torque arm square arm assembly 10, and the shape of the base 1 is matched with the structure of the torque arm square arm assembly; n threaded holes are machined in the bottom plate and used for installing supporting columns, N unthreaded holes and N threaded holes are machined in wall plates on the two sides of the base 1, the N unthreaded holes are used for installing positioning bushings 3, and the N threaded holes are used for installing positioning bush fixing screws and preventing the positioning bushings 3 from rotating and moving. The supporting plate 2 is placed on the base 1, the shape of the supporting plate 2 is arranged according to the structure of a square arm assembly of the torque arm, and a rubber pad is bonded to the supporting plate 2. The N positioning bushings 3 are installed on the base 1 in an interference fit mode.

The present invention discloses a method for preparing a gradient near-equiaxed crystal Cr coating on the surface of a zirconium alloy cladding, and belongs to the technical field of surface coatings for nuclear fuel claddings. The present invention adopts high-power pulsed magnetron sputtering technology, and independently transforms the HiPIMS equipment. Argon gas is introduced into the zirconium alloy cladding tube and the argon gas flow rate in the tube is controlled to regulate the tube wall temperature. The bias voltage, target-substrate distance, sputtering gas pressure and other parameters are comprehensively controlled to obtain a pure Cr near-equiaxed crystal coating on the surface of the zirconium alloy with three layers of gradient structure grains. The pure Cr coating on the surface of the accident-resistant zirconium alloy cladding designed by the present invention has good toughness, is not easy to fall off and crack, and a dense Cr2O3 protective oxide film can be generated on the surface when oxidized in a high-temperature steam environment, which significantly inhibits the diffusion of oxygen and improves the high-temperature oxidation resistance of the zirconium alloy cladding.

The application discloses a kind of high wear-resistant supercritical foaming TPU materials and preparation method thereof, it is related to high polymer material technical field, the material is made of the following weight parts of component: TPU granule 100 parts, wear-resistant filler 5~20 parts, compatible agent 3~10 parts, supercritical fluid foaming agent 3~5 parts, foaming aid 1~5 parts, antioxidant 0.5~2 parts and lubricant 0.5~2 parts;The wear-resistant filler is the compound of surface aminated modified nanometer silicon dioxide and surface carboxylated modified polytetrafluoroethylene micro powder, melt blending granulation is obtained to composite master batch by wear-resistant filler, TPU and other aid, after the master batch is shaped into sample, by supercritical fluid impregnation and fast pressure relief foaming, obtain final product.The application is still able to keep excellent wear resistance after supercritical foaming by unique wear-resistant system and interface design, solve the industry problem of poor wear resistance of foaming material, and process environment protection, easy to industrial production.

The utility model discloses a kind of high-speed automatic color box sticking box devices with adjustable positioning stop block, including rack, conveying mechanism being set on rack, gluing mechanism and pressing mechanism being located above conveying mechanism, further including adjustable positioning stop block mechanism, the adjustable positioning stop block mechanism includes fixed base located in conveying mechanism side, positioning stop block component, fine adjustment drive mechanism and locking mechanism, the fixed base is fixedly installed on rack, guiding structure is equipped on the fixed base, the guiding structure is at least one precision linear guide rail being set on fixed base. Through adjustable positioning stop block mechanism, with the aid of precision linear guide rail guidance and fine adjustment drive mechanism, the high-precision linear adjustment of positioning stop block is realized, different size color box is adapted, adjustment is convenient and precision is high, without frequently replacing stop block, upgrade change type efficiency. Corresponding different bonding edge can meet single, double bonding edge and a variety of needs, and the versatility is strong.

The invention discloses a fiber winding shell skirt bonding forming method which comprises the following steps: after a winding core mold is formed, machining is carried out according to the molded surface of an inner heat insulation layer of a fiber winding shell, the inner heat insulation layer is adhered to the winding core mold and polished, skirt inner winding is carried out on the surface of the inner heat insulation layer in a spiral winding and annular winding alternating winding mode, and an uncured shell is obtained; the method comprises the following steps: processing a stress release groove, bonding a rubber buffer layer on the inner surface and the outer surface of a skirt and curing, installing the skirt to a skirt bonding area of an uncured shell, binding the skirt on the buffer layer on the outer surface of the skirt and annularly winding, and hoisting into a curing oven for rotary curing after the annular winding is finished. According to the bonding forming method, the bonding quality of the upper skirt is improved, the process reliability is high, and the method is suitable for a wet-process upper skirt fiber winding shell.