27 results about "Thermal creep" patented technology

The invention relates to the technical field of numerical control, in particular to a steel laser cutting numerical control system and method based on the Internet of Things. The method comprises the following steps: collecting three-dimensional temperature distribution data of a lens group in real time, and obtaining actual position coordinates of a laser focus through a displacement sensor; establishing a thermal deformation focus offset mapping table based on the corresponding relationship between the three-dimensional temperature distribution data of the lens group and the actual position coordinates of the laser focus; in the continuous machining process, workshop environment temperature and humidity parameters are monitored in real time, the thermal deformation amount of the lens set is predicted according to the workshop environment temperature and humidity parameters based on the thermal deformation focus offset mapping table, and the laser focus position is compensated and adjusted according to the thermal deformation amount of the lens set. The problems that an existing numerical control system can only calibrate linear deformation and lacks dynamic correction capacity for focus three-dimensional offset caused by nonlinear thermal creep of the lens set are effectively solved, and the influence of environment change on machining precision in the machining process can be coped with in real time.

The invention belongs to the technical field of titanium alloy casting machining, and particularly relates to a titanium alloy casting thermal creep correction casting surface protection method which comprises the steps that the surface of a graphite tool is coated with at least one layer of fireproof paint, and at least one coating is obtained; and roasting the coating so as to form a protective layer on the surface of the graphite tool. According to the casting surface protection method, the surface of the graphite tool is coated with the fireproof coating, so that direct contact between the titanium alloy casting and graphite is isolated in the thermal creep correction process, parameters of a pollution layer and a carburized layer on the surface of the casting can be effectively reduced, and the surface quality of the casting is improved; and the surface pollution of the titanium alloy casting in the thermal creep process is effectively solved.

A kind of composite manufacturing method of blade leading edge titanium alloy reinforcing edge hot creep and diffusion connection, titanium alloy reinforcing edge upper and lower thin-walled prefabricated parts are respectively prepared by the way of cutting plate material, titanium alloy reinforcing edge middle layer block prefabricated part is prepared by the way of cutting titanium alloy block material;After being assembled, the upper thin-walled prefabricated part, the core mold, the middle layer block prefabricated part and the lower thin-walled prefabricated part are arranged between the upper and lower molds, and the prefabricated part is bent and attached to the mold by cold pressing, and the titanium alloy reinforcing edge is obtained by composite forming after die closing.The composite method of hot creep and diffusion connection after piece cold pressing is used to process leading edge reinforcing edge once, which can significantly improve the forming efficiency and material utilization rate, shorten the processing cycle, and at the same time, the size precision and forming quality of reinforcing edge can be well controlled.

The invention belongs to the technical field of industrial automation control and fault diagnosis, and relates to a lithium iron phosphate rotary kiln sealing failure fault diagnosis method and system. The method comprises the steps that the instantaneous pressure of a sealed cavity, the rotation angle of a barrel, the surface temperature and the accumulative operation time are collected; a rotation modulation leakage index is calculated based on the instantaneous pressure and the rotation angle, and periodic respiration effect characteristics caused by cylinder eccentricity are extracted through angle weighting; calculating a thermal creep correction factor based on time and temperature, and quantifying the aging tendency of the material; and the two are fused to calculate a sealing failure risk index, and graded early warning or shutdown control is executed accordingly. According to the method, early deformation leakage can be found in advance when the sealing pressure does not fall to the threshold value, the diagnosis standards under the equipment aging and high-temperature working conditions are corrected in a self-adaptive mode, and the accuracy and timeliness of fault diagnosis are effectively improved.

This application relates to the field of engineered wood panel manufacturing technology, and discloses a flexible, shapeable technological board and its preparation method. The technological board comprises two layers of reconstituted decorative veneers and a modified polyolefin adhesive film layer located between them. The adhesive film layer is made of metallocene propylene-based elastomer, polyolefin elastomer, maleic anhydride-grafted polyolefin initiator, crosslinking aid, and silane coupling agent. The preparation method includes: coating the surface of resin particles with liquid-phase additives, and obtaining an adhesive film with latent reactive activity through low-temperature extrusion casting; stacking the veneers and adhesive film layers, initiating crosslinking reaction and interfacial bonding through high-temperature hot pressing, and then holding the pressure and cooling for shaping. This invention solves the problems of high formaldehyde content and brittleness of traditional adhesives and poor heat resistance of ordinary thermoplastic films. The resulting board has excellent flexibility, heat creep resistance, and water-resistant bonding strength, meeting the requirements for irregular curved surface shaping.

The application relates to the technical field of hot press forming of titanium alloy parts, and particularly discloses a hot creep forming process method of a titanium alloy, which specifically comprises the following steps: (1) cleaning the surface of TA32 titanium alloy blank and a die by using a cleaning solvent until no dust, corrosion, grease, impurities and other dirt are present on the surface; (2) installing the die to a hot forming machine; (3) brushing a high-temperature resistant lubricant on the surface of the TA32 titanium alloy blank and the die; (4) starting the hot forming machine to heat the die, and heating the die to a temperature range of 780-820 DEG C; (5) placing the TA32 titanium alloy blank into the hot forming machine, and preheating for 5-12 min; (6) clamping the upper die and the lower die of the die to apply to the preheated TA32 titanium alloy blank, and taking out the part after heat preservation for 10-15 min under the pressure condition. The scheme mainly proposes an optimization scheme for the hot creep forming process of the TA32 titanium alloy, so that the forming precision is improved.

The invention belongs to the technical field of titanium alloy casting machining, and particularly relates to a titanium alloy casting thermal creep correction casting surface quality improving method which comprises the steps that before thermal creep correction is conducted, the surface of a titanium alloy casting is coated with at least one layer of fireproof coating, and then the surface of the titanium alloy casting is coated with the fireproof coating; at least one coating is obtained; and roasting the coating to form a protective layer on the surface of the titanium alloy casting. According to the method for improving the surface quality of the casting, the surface of the titanium alloy casting is coated with the refractory coating, so that the titanium alloy casting is isolated from the graphite tool in the thermal creep correction process, parameters of a pollution layer and a carburized layer on the surface of the casting can be effectively reduced, and the surface quality of the casting is improved; and the surface pollution of the titanium alloy casting in the thermal creep process is effectively solved.

The invention provides an aberration analysis method of an extreme ultraviolet lithography system, which comprises the following steps of: constructing a space energy distribution model of a shared hot area, reconstructing a composite aberration original field jointly caused by overlapping thermal creep of adjacent mirror surfaces in the shared hot area, extracting a main trend field formed by common thermal deformation of the adjacent mirror surfaces, and analyzing the aberration of the extreme ultraviolet lithography system according to the main trend field. Separating a residual field representing mirror independent deformation contribution from the composite aberration original field, distributing deformation in the residual field to a corresponding responsible mirror to form single-mirror attributable aberration fields, and distributing a weight based on the influence degree of the single-mirror attributable aberration fields on the imaging quality for each single-mirror attributable aberration field to form a single-mirror attributable aberration field; and synthesizing the weighted aberration fields of the mirror surfaces with the main trend field to generate a final aberration analysis result for aberration compensation. The method can effectively identify, separate and attribut to the composite aberration caused by overlapping thermal creep of the adjacent mirror surfaces; and the long-term imaging stability and reliability of the extreme ultraviolet lithography system under efficient operation are ensured.

The invention discloses a food contact grade water-based VAE adhesive for PE coated kraft paper as well as a preparation method and application of the food contact grade water-based VAE adhesive, and belongs to the technical field of polymer adhesives. The water-based VAE adhesive is prepared from the following components in percentage by mass: 1%-50% of a DiverSol540 VAE emulsion, 30%-90% of a DiverSol613M VAE emulsion, 1%-35% of emulsified water-based rosin and 1%-10% of water. The water-based VAE adhesive disclosed by the invention can form high-strength combination with kraft paper fibers, simultaneously realizes excellent initial wetting and firm adhesion to high-gram-weight PE coated kraft paper, has good cohesion and heat resistance, can effectively prevent thermal creep in a high-temperature coating process or in subsequent use, and solves the problem of high-end food packaging.

The invention relates to the technical field of adhesives for coated abrasive tools, and discloses a preparation method of a bio-based composite adhesive, an adhesive composition and abrasive cloth, the adhesive is prepared from the following raw materials in parts by mass: phenol, a formaldehyde solution, enzymatic hydrolysis lignin, ethylene glycol, sodium hydroxide, ammonia water, urea, boric acid, other auxiliaries and water; the preparation method comprises the steps of pre-swelling and resin synthesis. Through a pre-swelling process that ammonia water and sodium hydroxide are matched to control alkalinity, not only can complete activation of enzymatic hydrolysis lignin be achieved, but also the characteristic of low ash content of the enzymatic hydrolysis lignin can be matched, it is ensured that the adhesive has extremely low ion mobility and stable dielectric constant, the requirement of an electrostatic sand planting process is met, and accurate orientation of abrasive particles is achieved in a matched mode. The reduction of the use amount of sodium hydroxide also avoids the reduction of moisture absorption and thermal creep resistance of an adhesive layer caused by alkali metal ion residues, and solves the problem that conventional lignin is difficult to apply to the adhesive for high-precision abrasive cloth.

The invention provides a radio frequency MEMS switch and a preparation method thereof, and relates to the technical field of radio frequency MEMS switches. A substrate of the radio frequency MEMS switch comprises a first surface and a second surface which are opposite to each other, a Peltier refrigeration module is embedded in the substrate, the Peltier refrigeration module comprises a refrigeration end and a heat dissipation end, and the refrigeration end is closer to the first surface compared with the heat dissipation end. The driving electrode is arranged on the first surface, and the first electrode and the second electrode are also arranged on the first surface. The cantilever beam is electrically connected with the first electrode, the cantilever beam is arranged on the side, away from the substrate, of the driving electrode, and the cantilever beam is configured to be electrically connected with the second electrode under driving of the driving electrode. The orthographic projection of the joint of the cantilever beam and the first electrode on the substrate is overlapped with the area where the Peltier refrigeration module is located, and / or the orthographic projection of the joint of the cantilever beam and the second electrode on the substrate is overlapped with the area where the Peltier refrigeration module is located, in-situ active cooling can be carried out, and thermal creep aggravation is restrained.

The invention provides a preparation method of a large-size thin-wall double-layer titanium alloy spray pipe. The technical problems that a traditional manufacturing method is low in efficiency, and the precision is difficult to guarantee are mainly solved. The method comprises the following steps: preparing a blank; processing the blank into a corresponding arc-shaped structure through a thermal creep process; removing the margins on the two sides of each blank in the width direction, and welding to obtain an inner pipe barrel blank and an outer pipe barrel blank; thermal protection coatings are sprayed on the surfaces of the inner walls and the outer walls of the inner pipe barrel blank and the outer pipe barrel blank; performing molded surface correction on the inner pipe barrel blank and the outer pipe barrel blank; detecting a molded surface; removing the margins at the two ends of the inner pipe barrel blank and the outer pipe barrel blank in the length direction; the thermal protection coatings on the surfaces of the inner pipe barrel blank and the outer pipe barrel blank are removed, and an inner pipe semi-finished product and an outer pipe semi-finished product are obtained; performing nondestructive testing on the inner pipe semi-finished product and the outer pipe semi-finished product; and the inner pipe semi-finished product and the outer pipe semi-finished product are spliced to obtain the large-size thin-wall double-layer titanium alloy spray pipe. Compared with a traditional manufacturing method, the machining efficiency and the machining precision are improved.

This invention provides a hot-melt adhesive that reduces stringing, has excellent thermal stability, superior adhesion to paper, and also exhibits excellent heat creep resistance and hot tack properties. [Solution] A hot melt adhesive comprising (A) ethylene / olefin copolymer having 3 to 20 carbon atoms, (B) ethylene / carboxylic acid ester copolymer, and (C) wax, wherein (A) ethylene / olefin copolymer having 3 to 20 carbon atoms contains (A1) metallocene-based ethylene / propylene copolymer, and (B) ethylene / carboxylic acid ester copolymer contains an ethylene / carboxylic acid ester copolymer having a content of constituent units derived from (B1) carboxylic acid ester of 2% by mass or more and 25% by mass or less, and a melt flow rate of 1 g / 10 min or more and 400 g / 10 min or less.

The present application belongs to the technical field of industrial automation control and fault diagnosis, and relates to a lithium iron phosphate rotary kiln sealing failure fault diagnosis method and system. The method comprises: collecting the instantaneous pressure of the sealing cavity, the rotation angle of the cylinder, the surface temperature and the cumulative running time; calculating the rotation modulation leakage index based on the instantaneous pressure and the rotation angle, and extracting the periodic breathing effect characteristics caused by the eccentricity of the cylinder by angle weighting; calculating the thermal creep correction factor based on time and temperature, and quantifying the material aging tendency; and fusing the two to calculate the sealing failure risk index, and accordingly performing graded early warning or shutdown control. The present application can discover early deformation leakage in advance when the sealing pressure has not yet dropped below the threshold, and adaptively corrects the diagnosis standard under the conditions of equipment aging and high temperature, effectively improving the accuracy and timeliness of fault diagnosis.

The invention relates to the technical field of industrial automation control, in particular to a lithium iron phosphate rotary kiln sealing pressure self-adaptive control method and system, and aims to solve the technical problems of sealing gap fluctuation caused by cylinder thermal creep and gravity bending in the prior art and leakage and abrasion caused by feedback control lag in the prior art. The method comprises the following steps: acquiring operation data of the rotary kiln; based on the current effective value and the accumulated operation time, constructing a thermogravity coupling deformation index; constructing a target sealing pressure feedforward model, and calculating a theoretical optimal sealing pressure set value at the current moment; and calculating the control quantity finally output to the execution mechanism. According to the invention, the wear rate of the sealing element can be reduced, and continuous sintering of high-quality materials is guaranteed.

The application provides a gradient crosslinking nuclear material and a preparation method thereof, and relates to the technical field of materials.The material is an insulating material prepared from a binary ethylene-propylene rubber base material and an inorganic flame retardant; the material has a structure with a gradient decrease in crosslinking density from an outer surface to an inner surface along a radial direction, wherein an outer layer region with a thickness ratio of 20%-30% from the outer surface to the inner surface has a first crosslinking rate, the remaining inner layer region has a second crosslinking rate, and the first crosslinking rate is greater than the second crosslinking rate.The method pre-compensates the service life of the outer layer aging through a gradient crosslinking network constructed by controlled variable-energy irradiation.The structure makes the failure times of the inner and outer layers of the cable tend to be dynamically synchronized, can effectively inhibit the interface phase separation and micro-crack growth induced by radiation, and improves the comprehensive fireproof performance and the anti-thermal creep ability.

The invention relates to the technical field of hot melt adhesives, in particular to an oil-resistant and heat-resistant hot melt adhesive for an end cover of an automobile filter and a preparation method of the hot melt adhesive. The hot melt adhesive is mainly prepared from the following components in parts by mass: 1000 parts of copolyamide hot melt adhesive resin, 120-180 parts of maleic anhydride grafted ethylene propylene diene monomer, silanized zinc oxide composite powder preloaded by two types of stearic acid in a specific proportion, zinc stearate and an antioxidant. The preparation method comprises the following steps: preparing the modified rubber and the functional filler, and carrying out melt blending on the modified rubber and the functional filler and resin under specific process conditions. Through the synergistic effect of the reactive compatibilization and the functional filler, the problems that a traditional pouring sealant is prone to thermal creep, swelling and interface adhesion attenuation under long-term soaking of high temperature and hot oil in an engine compartment are solved, and the hot melt adhesive is endowed with excellent high-temperature creep resistance, oil resistance and aging resistance.

The invention discloses a high-thermal-stability heat transfer printing release film and a preparation method thereof, and belongs to the technical field of heat transfer printing, a microcrystalline cellulose natural polymer material is introduced, the microcrystalline cellulose natural polymer material is subjected to activation and amination modification and then serves as a functional filler to participate in crosslinking of polyimide, and microcrystalline cellulose is derived from plant fibers and is renewable and degradable; part of traditional petrochemical base filler is replaced, and dependence on non-renewable resources is reduced; meanwhile, active groups such as hydroxyl and amino on the surface can form strong interaction with other components, and a toxic coupling agent does not need to be additionally added; the core raw material of the thermal transfer release film with high thermal stability is modified polyimide, the polyimide has excellent thermal decomposition temperature, and thermal creep of polyimide molecular chains at high temperature is further inhibited through embedding of anhydride modified PET and aminated microcrystalline cellulose.

The invention belongs to the technical field of photovoltaic packaging, and provides a photovoltaic packaging adhesive film and a preparation method and application thereof. The adhesive film is prepared from the following components in parts by weight: 50 to 80 parts of thermoplastic POE (Polyolefin Elastomer) matrix resin, 20 to 50 parts of silane grafted POE resin, 1.5 to 3 parts of UiO-66-NH2MOFs, 2 to 4 parts of hydroxyapatite, 1 to 5 parts of nano SnO2 (at) Ce, 0.1 to 0.5 part of an antioxidant and 0.8 to 1.8 parts of an interface coupling agent. Through cooperation of a UiO-66-NH2MOFs-hydroxyapatite double-chelation system and a nano SnO2 (at) Ce-antioxidant, the adhesive film has low-temperature processability, high interface bonding strength, excellent lead leakage resistance, PID resistance and thermal creep resistance, is especially suitable for packaging a perovskite photovoltaic module, can avoid the problem of perovskite damage caused by high-temperature lamination, and has a good application prospect. And the interface bonding, lead leakage resistance, PID resistance and thermal creep resistance of the perovskite photovoltaic module can be improved, and the use stability of the perovskite photovoltaic module can be improved.

The utility model relates to the technical field of centrifugal pumps, and discloses an anti-deformation centrifugal pump adopting double liquid outlet pipes, which comprises a motor, a pump body, an impeller volute and the double liquid outlet pipes, and is characterized in that the motor is arranged at the top of the pump body, a connecting sleeve is fixedly sleeved outside the pump body, a protective cover is integrally mounted on the connecting sleeve, and the protective cover is connected with the impeller volute. The protective cover can effectively prevent foreign matters from entering the motor, a plurality of ventilation holes are formed in the protective cover, good heat dissipation of the motor is ensured, the impeller volute and the pump body are installed, and a liquid inlet is formed in the bottom of the impeller volute. By optimizing a bearing lubricating system, the friction resistance is further reduced, the rotating efficiency of the pump shaft is improved, the service life of the bearing is prolonged, the overheating phenomenon caused by long-time operation is avoided, the risk that the centrifugal pump deforms due to high-temperature thermal creep is remarkably reduced, the centrifugal pump can still stably operate in a high-temperature environment, and the service life of the centrifugal pump is prolonged. And the service life of the whole equipment is prolonged.

The present invention provides a polyurethane adhesive composition for resisting long term thermal creep. The polyurethane composition comprises a reinforced primer composition and a polyurethane prepolymer, wherein the strengthened primer composition comprises a boric acid-alcohol amine complex formed by complexing boric acid and diethanol amine, phosphorus-containing reactive polyol, water and / or a solvent. The composition solves the problem that a polyurethane adhesive for engineering wood cannot give consideration to long-term thermal creep resistance and construction convenience at the same time.

The application relates to the technical field of threads, and provides a high-temperature and high-pressure self-balancing airtight threaded connection structure, which comprises two pipe fittings, the end of each pipe fitting is provided with a first threaded part and a second threaded part, the second threaded part is arranged on the inner side of the pipe fitting, the tooth root of the first threaded part is provided with a nested threaded part in a convex manner, a coupling fitting is sleeved on the outer periphery of the adjacent ends of the two pipe fittings, a third threaded part is arranged at each end of the coupling fitting and is in threaded connection with the first threaded part of the pipe fitting, the tooth top of the third threaded part is provided with a nested threaded groove in threaded connection with the nested threaded part, a sealing piece is connected to the inner side of the adjacent ends of the two pipe fittings, the sealing piece is provided with two sealing threaded parts, and the two sealing threaded parts are in threaded connection with the second threaded parts of the two pipe fittings respectively. The technical problem that the threaded structure is damaged due to thread deformation caused by thermal creep of the pipeline structure under a high-temperature and high-pressure environment in the prior art is solved, and the failure rate of the pipeline structure under the high-temperature and high-pressure environment is reduced.

The application relates to the field of OLED devices and discloses an enhanced high-precision metal mask plate, which comprises a mask plate, an evaporation area located in the middle of the mask plate, and a non-evaporation area located close to the two side edges of the mask plate; a plurality of micro-hole arrays are arranged in the evaporation area; a plurality of hexagonal opening units penetrating through the mask plate are arranged in the non-evaporation area, a cooling channel is arranged in the inside of each hexagonal opening unit, and the cooling channel is used for introducing a cooling medium. The bionic honeycomb hollow structure is adopted in the non-evaporation area, so that the non-evaporation area is lightened by 80% and high rigidity is achieved. The formed independent opening units can isolate the long-range transmission of thermal stress, and the overall warping deformation is avoided in the structure. Meanwhile, the cooling channel is introduced into the opening unit, an external PID temperature control system is adopted, the overall temperature of the mask plate is controlled, and the occurrence of thermal creep is eliminated from the root.

The invention relates to the field of OLED devices, and discloses an enhanced high-precision metal mask plate which comprises a mask plate, an evaporation area located in the middle of the mask plate, and non-evaporation areas located on the mask plate and close to the edges of the two sides. A plurality of micropore arrays are distributed in the evaporation area; a plurality of hexagonal opening units penetrating through the mask plate are formed in the non-evaporation area, a cooling channel is formed in each hexagonal opening unit, and a cooling medium is introduced into the cooling channels. The bionic honeycomb hollow structure is adopted in the non-evaporation area, so that the non-evaporation area achieves high rigidity while achieving light weight and weight reduction by 80%. The formed independent opening units can isolate long-range transmission of thermal stress, and integral buckling deformation is structurally avoided. And meanwhile, the cooling channel is introduced into the tapping unit, and the overall temperature of the mask plate is regulated and controlled through an external PID temperature control system, so that the problem of thermal creep is radically eradicated.

The invention discloses a multi-physical field simulation method and system for molybdenum-uranium-silicon fuel, and relates to the technical field of fuel simulation, and the method comprises the following steps: calculating equivalent physical property parameters of the molybdenum-uranium-silicon fuel by adopting a homogenization method based on physical property parameters and proportions of all components in the molybdenum-uranium-silicon fuel; constructing a heat transfer model of the fuel pellet and a fuel pellet mechanical model containing thermal expansion and thermal creep effects on an MOOSE finite element platform based on the equivalent physical property parameters; constructing a fission gas release model and a corresponding fuel swelling model; carrying out strong coupling on the heat transfer model, the mechanical model, the fission gas release model and the swelling model, and establishing a comprehensive simulation system; and inputting operation condition parameters of the pressurized water reactor, carrying out numerical solution, and outputting simulation results of a temperature field, a stress field and a strain field of the molybdenum-uranium-silicon fuel under the irradiation condition. According to the method, thermal-mechanical calculation and fission gas behavior simulation are strongly coupled, so that the simulation precision is improved.

The invention discloses a material creep fracture life prediction method and device, equipment and a storage medium. The method comprises the steps that a creep constitutive relation and a Monkman-Grant relation are correlated to obtain a creep influence model, the criterion of the creep influence model for a material is verified, the creep condition of the material needing life prediction is determined, and the predicted life of the material is output. The device, the equipment and the storage medium all correspond to the method. According to the method, the service life analysis model for effectively representing creep mechanism transformation is established for the thermal creep fracture service life, and accurate prediction of the fracture service life under dominance of different creep mechanisms can be realized; for the irradiation creep life, a creep life analysis model considering the irradiation influence is established, and through analysis of all influence factors, irradiation mainly influences vacancy diffusivity, promotes vacancy absorption of dislocation and improves dislocation mobility, so that the irradiation creep steady-state strain rate is increased, and the creep life is shortened; therefore, the creep fracture life of the material is predicted.