14results about How to "Avoid debonding" patented technology

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 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 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 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 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 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.