45results about How to "Solve problems such as cracking" patented technology

The invention provides an ultrasonic and micro-forging composite device for improving the microstructure and performance of additively manufactured metal and an additive manufacturing method. The ultrasonic and micro-forging composite device comprises an energy converter, a pneumatic slider, a pneumatic slider connection frame, an amplitude transformer, a tool head and a roller. The energy converter is arranged in an energy converter shell, the energy converter shell is provided with an inserting piece and a pipeline connector, the amplitude transformer is connected to the lower end of the energy converter, the tool head is connected below the energy converter, the roller is located between the tool head and a workpiece, and the pneumatic slider is connected with the energy converter shell and the amplitude transformer through the pneumatic slider connection frame. By means of the ultrasonic and micro-forging composite device, the advantages that ultrasonic impact frequency is high and deformation generated by mechanical rolling is large are combined, the composite effect of ultrasonic impact and continuous rolling micro-forging can be achieved, and the purpose of improving the microstructure of the additively manufactured metal and the mechanical performance of parts is achieved. Through organic combination of the ultrasonic and micro-forging composite device and the additive manufacturing method with an existing additive manufacturing technology, the technical bottleneck that structure control is easy while performance control is difficult in existing metal additive manufacturing is solved, and innovation and development of metal rapid forming and manufacturing technologies are induced.

The invention provides a super-thick bamboo-wood composite board, which comprises a core board, a surface board and a back board, wherein the core board is a super-thick rotary-cut single board with the thickness of 6-12 mm, the surface board and the back board are made of bamboo, the core board comprises a plurality of super-thick single boards, the contiguous layers of the super-thick single boards are in the combination along the grain, a glue layer is arranged between contiguous single boards, the adhesive of the glue layer is an aqueous macromolecule isocyanate adhesive, the super-thick single boards of the core layer are single boards after the processing of stress degradation, and spot-shape or segment-shape crack grains are formed in the direction along the grain of the loosened surface of every single board. Compared with the prior composite board of the same thickness, the composite board has greatly-reduced glue amount and no deformation or distortion.

The invention discloses a laser additive manufacturing technology of high-temperature alloy parts, and belongs to the technical field of laser additive manufacturing of metal powder. According to the invention, the technological parameter ranges of different high-temperature alloy materials are determined through basic technological experiments, and then additive manufacturing is carried out by adopting specific laser scanning paths and related internal defect control methods in the manufacturing process. The parts manufactured through the technology have the advantages that the forming efficiency is high, the cost is low, the internal quality is high, the automation degree is high and operation is easy. The high-temperature alloy parts capable of being applied industrially can be directly manufactured by adopting the technology, so that a new approach for manufacturing the high-temperature alloy parts is provided.

The invention discloses a laser melting deposition method of a ceramic reinforced high-entropy alloy composite component. The method includes the following steps that (1) raw materials are prepared; (2) the raw materials are treated; (3) a path of a laser layer-by-layer melted accumulated reinforced phase high-entropy alloy is planned; and (4) a reinforced phase high-entropy alloy component is subjected to laser stereoscopic forming. The laser melting deposition technology is creatively applied to preparation of the ceramic reinforced high-entropy alloy composite component, process parametersof laser melting deposition of the ceramic reinforced high-entropy alloy composite component are explored, the restriction technical problem of laser melting deposition of the ceramic reinforced high-entropy alloy composite component is solved, and the method has great significance in research and application of the component.

A fully automatic spraying trolley for the maintenance of the second lining concrete of the tunnel, which is provided with an upper arch and a side arch around the main frame, and a side arch is respectively connected to the lower sides of the two sections of the upper arch. There is a trolley traveling mechanism at the lower end of the main frame, which mainly includes: rails, traveling wheels, travel switches, motors and driving mechanisms. A set of radial plate telescopic mechanisms are arranged on the front and rear radial end faces of the trolley, which mainly include: upper and lower spoke plates, upper and lower web plate fixing frames, electric push rods, force sensors, guide wheels and self-lubricating plates. There is an automatic spraying mechanism for curing mist on the arch, which mainly includes: a water storage tank, an electric heating steam generator, a nozzle, a temperature sensor, a humidity sensor and pipelines. There is a condensate accumulation and recovery mechanism under the main frame, which mainly includes: a liquid accumulation tray, an accumulation liquid tank, a water pump and a filter. The invention neither damages the concrete surface nor affects the on-site operation environment, but can ensure the temperature and humidity of the secondary lining concrete during the curing period.

The invention discloses an adjustable bridge rail support comprising an upper rail board and a lower rail board which performs mechanical transmission with the upper rail board via a gear shaft. The steel-concrete composite structure bridge support of the present invention effectively solves the problems of existing steel-concrete composite structure bridge bearings under external load, falling off of roof, overrun of vertical displacement, and limited angle of rotation at locals of girders so that the stress of the steel-concrete composite structure is uneven, and the technical problems suchas fatigue, cracking, and the like of the bridge deck pavement are prone to occur.

The invention discloses a water super-absorbing resin-based inner cured cement stabilized broken stone base material. The material comprises, by weight, 100 parts of broken stones, 4.5 to 5.5 parts of cement and 4.5 to 6 parts of water and the additive use amount is 0.5 to 1.3% of the amount of the cement. The water super-absorbing resin is a water swelling-type polymer which contains strong hydrophilic groups such as a hydroxyl group and a carboxyl group and has a certain crosslinking degree. Through adsorption action, the water super-absorbing resin can store water and is uniformly distributed in the cement stabilized macadam mixture. In the latter period, under driving of humidity gradient difference, osmotic pressure and capillary interspace negative pressure in the mixture, the water super-absorbing resin releases pre-stored water to cure cement stabilized broken stones so that the problem that poor water supplement and maintenance in the cement stabilized broken stone cause shrinkage and reduce cracking resistance is solved, greatly improves cracking resistance of the cement stabilized broken stones, delays road surface base reflection cracking and improves road durability.

The invention discloses an enhanced hydroxypropyl cellulose microporous film and a preparation method thereof. The preparation method comprises the following steps: dissolving hydroxypropyl cellulose into an alkaline water-soluble solvent system subjected to precooling treatment to obtain a hydroxypropyl cellulose solution; causing the obtain solution to form a film through tape casting, and solidifying in an acid coagulation bath; carrying out cross-linking and plasticizing processing after water washing, and continuing to water vapor boiling under atmospheric pressure or freezing or water vapor boiling under the atmospheric pressure and then freezing; and drying in the air to obtain the enhanced hydroxypropyl cellulose microporous film. The hydroxypropyl content of the hydroxypropyl cellulose is 2-20 percent by weight. The toughness, the tensile strength and the air and water permeability of the film are improved, and the biodegradable homogeneous microporous film is obtained. The microporous film can be widely applied to the film separation process and can be used as packaging films, film electrodes or biomedical materials.

The invention discloses an injection (MIM) molding method of a large metal piece. The method comprises such steps as sintering raw material pretreatment, raw material coating, feeding granulation, mold design, injection molding, degreasing, splicing and sintering. The method solves such problems as cracking and bubbling caused by incomplete degreasing in manufacturing of the large metal piece by a traditional MIM method, and prevents potential safety hazards in production when improving the quality of the large metal piece.

The invention discloses a method for flattening and drying a rotary cut veneer. The method for flattening and drying the rotary cut veneer includes the following steps of rotary cutting of the veneer, grooving of a loose face of the veneer and drying and shaping by a hot press. A series of line-segment-shaped wedge-shaped grooves are formed in the loose face of the rotary cut veneer through wedge-shaped teeth of a flattening roller of a flattening machine and the veneer is flattened. The hot press is used for carrying out drying and shaping on the flattened veneer and the problems of deformation, cracking and the like of the rotary cut veneer can be effectively solved.

The invention discloses an indoor seamlessly-spliced secondary light partition wall system. The indoor seamlessly-spliced secondary light partition wall system comprises a keel frame and dampproof membrane layers. The keel frame comprises joint keels and vertical keels perpendicularly connected with the joint keels. The dampproof membrane layers are attached to the two side faces of the keel frame. The top and the bottom of each dampproof membrane layer are horizontally provided with horizontal keels respectively. Apex-angle keel bars and foot-margin keel bars are arranged on the top horizontal keels and the bottom horizontal keels respectively. Multiple seamlessly-spliced wall plates are horizontally inserted in grooves of the apex-angle keel bars and the foot-margin keel bars. The apex-angle keel bars and the foot-margin keel bars are buckled to apex-angle lines and bed plates respectively. The invention further discloses a rapid construction method of the indoor seamlessly-spliced secondary light partition wall. By means of the light partition wall system and the partition wall rapid construction method, the problems that a light partition wall for indoor secondary construction is difficult to connect, fix, construct and the like are solved, the installed partition wall is firm, vertically smooth and free of cracks, the requirements for seismic resistance and use functions can be met, the construction process is simplified, and the soundproof performance and fireproof performance are improved.

The invention discloses a copper embedded block heat radiation substrate comprising a substrate body, wherein the substrate body is provided with a copper embedded block via groove, a heat radiation copper block is arranged in the copper embedded block via groove, and a surface of the heat radiation copper block is level with a surface of the heat radiation substrate. The heat radiation copper block is arranged in the substrate, a top face and a bottom face of the heat radiation copper block are exposed from an outer part of the substrate, and the heat radiation substrate is enabled to have adouble face heat radiation structure; compared with a conventional copper embedded block PCB board only capable of single surface heat radiation, the copper embedded block heat radiation substrate disclosed in the invention is advantaged by improved heat radiation efficiency. The invention also discloses a manufacturing method for the copper embedded block heat radiation substrate; a two time etching method is adopted for manufacturing the heat radiation copper block of which double surfaces are exposed, size precision of the heat radiation copper block is improved in such a processing mannerthat a bottom part heat radiation copper block is manufactured after pressing operation, and copper blocks are bonded together via two time pressing operation; a problem that the copper blocks are prone to deviating, loosening, cracking and the like; copper block processing efficiency and quality stability can be improved.

The invention discloses a method for monitoring crack defects in a heavy load runway girder. According to the method, electromagnetic ultrasonic surface wave probes that satisfy the sensitivity requirement are chosen and oppositely/parallelly arranged on the arc parts of the runway girder web in the column shoulder beam; the plug ends of the cables of the probes are connected to an electromagnetic ultrasonic data collecting instrument so as to perform onsite echo data collection; the change of echo is observed, when the structural echo of the arc surface of the runway girder web just disappears, the position of the acoustic beam angle of the probes is taken as the position for fixing the probes; after the probes are fixed, the waveform data of each probe is collected and observed at regular intervals and compared; when obviously abnormal echoes are found, a reliable method is adopted to confirm the property of the echoes, the extension situation of the abnormal echoes of crack defects is determined through regularly collected echo data so as to judge whether the runway girder is cracked or not. The defects of conventional detection modes are overcome by the provided method, through the prediction, the safety hazards can be found in time, and the great loss of accidents is avoided.

The invention provides a nickel-cobalt binary precursor and a preparation method thereof. According to the invention, a batch-type process is adopted, and the nickel-cobalt binary precursor which is free of surface cracks, large in particle size and high in sphericity degree is synthesized in two stages through a hydroxide co-deposition method. The pH value of the system is continuously increased along with the increase of the particle size in the growth stage of the precursor, so that two primary particles with different sizes grow on the surfaces of the secondary particles, and the cracking phenomenon caused by uneven stress between the primary particles is solved. The method provided by the invention has no additional cost, the prepared nickel-cobalt binary precursor D50 is 15-20 microns, the tap density is 1.9-2.2 g/cm<3>, the specific surface area is 6-12 m<2>/g, the product physical index is excellent, the consistency is high, the technological process is stable, and the precursor material is an excellent nickel-cobalt-aluminum positive electrode precursor material.

The invention discloses an integrated circuit packaging method which comprises the following steps: step 1, thinner top metal is deposited, and a passivation layer PAD window is defined and opened through photoetching after the passivation layer is formed; step 2, a metal layer is deposited again; and step 3, metal except the PAD window on the passivation layer is removed. The metal strength in a PAD area is reinforced selectively, and the metal on other wired areas is kept thinner, so that the problem of cracking of metal in the PAD area due to packing wire bonding stress is solved under the condition that the wiring density is not influenced.

The invention discloses a welding optimization process for a steel casting of an oil pumping unit, relating to the technical filed of a machining process for parts of the oil pumping unit of an oil well. The welding optimization process comprises the following steps of: (1), putting a steel casting workpiece to be welded in a furnace for preheating; (2), welding the preheated steel casting workpiece for fixing; and (3), putting the welded steel casting workpiece in the furnace till the steel casting workpiece is cooled. The preheating temperature in the step (1) is 330-380 DEG C. According to the invention, an optimization process is adopted for carrying out welding, such that the stress is removed, the compositional variation is reduced, the welding position is hard to break, and the service life of a load bearing member of the oil pumping unit is prolonged.

The invention relates to electric spin-flaring equipment. The electric spin-flaring equipment comprises a box. A casting base is arranged at the upper end of the box. An oil cylinder is arranged in the middle of the casting base in the length direction. A cylinder rod end of the oil cylinder is connected with a vertical motor through a speed reducer. A multi-way valve is arranged on one side of the casting base. A displayer and a limiting plate are arranged on the other side of the casting base. A lifting lug is fixedly connected to the middle position, in the length direction, of the casting base. A protruding part is arranged at the other end, opposite to the motor, of the casting base. A casting cover is arranged at the top of the protruding part. A turning piece is connected to the casting cover in a screwed mode through threads. The lower end of the turning piece is fixedly connected with a pressing block. A separation plate clamp is arranged at the lower end of the pressing block. A pipe cavity is formed in the separation plate clamp. By the adoption of the equipment, the problems that nonuniformity is likely to be caused during steel pipe flaring and cracks are caused during flaring of steel pipes made of different materials can be solved; and in addition, the structure is flexible, an ordinary welding way can be replaced, the sealing effect is good, and the production efficiency is high.

The invention discloses a tunnel water seepage early warning device and a tunnel water seepage monitoring processing method. The tunnel water seepage early warning device comprises a plurality of water seepage monitoring devices and a monitoring display device, and the plurality of water seepage monitoring devices are sequentially buried in a soil layer on the periphery of a tunnel at intervals along the extension direction of the tunnel; the water seepage monitoring device comprises a water seepage monitoring box filled with sample soil and is used for filtering water seepage in an external soil layer and enabling the water seepage to permeate into the sample soil. and a real-time detector for detecting the weight of the sample soil in real time is arranged in the water seepage monitoring box, the real-time detector is connected with a signal processing device, and the signal processing device is connected with a monitoring display device in a wireless or wired mode. The signal processing device converts the received sample soil weight signal into a sample soil moisture content signal and then transmits the sample soil moisture content signal to the monitoring display device, and the monitoring display device draws a moisture content curve of the moisture content changing along with the mounting position according to the sample soil moisture content signal and compares the moisture content curve with a preset moisture content allowable peak value line in the monitoring display device for early warning, and therefore, remote monitoring personnel can timely judge the water seepage condition of the tunnel for corresponding treatment.

The invention relates to a repair method of an existing building wall thermal insulation system. The thermal insulation decoration system comprises a keel and metal outer wall decoration plates whichare arranged outside a base layer wall. The repair method comprises the steps of keel design, base layer treatment, keel laying, metal outer wall decoration plate laying and local cavity-free treatment. Through the combination of the metal outer wall decoration plate, an anchoring part and the keel, the thermal insulation system is integrally suspended on an existing wall, and procedures such as shoveling, layer-by-layer grouting are not needed, the construction steps are simple, the influence of existing thermal insulation system defects is avoided, and the applicability is high; according todifferent heights and body type characteristics of existing buildings, the keel material and density are designed, the fixing points of the metal outer wall decoration plates and the keel are increased, combined with the tongue-and-groove design of metal outer wall decoration plates and the local cavity-free treatment, the outward pulling force of negative wind pressure on the thermal insulationsystem can be born, and the load requirement is achieved; and the effect of ventilation and waterproofing is realized by combining the local cavity structure design, and the problems such as wall hollowing, cracking caused by water seepage are fundamentally solved.

The invention relates to a combined external wall thermal insulation board, which comprises an external wall main thermal insulation board, a matching thermal insulation board and rotating columns. The right end of the external wall main thermal insulation board is uniformly provided with matching grooves from top to bottom. Rotating columns are arranged between the inner walls of the upper and lower ends of the matching grooves, and matching blocks are uniformly arranged from top to bottom on the left end of the matching thermal insulation board. The matching blocks are connected to the rotating columns through bearings. The matching grooves and the matching blocks are arranged at intervals. An installation process of the combined external wall thermal insulation board relates to specialprocessing equipment for the above-mentioned combined thermal insulation board. The special processing equipment for the combined thermal insulation board comprises a base, a fixing unit and a gluingunit. The joint of the combined thermal insulation board is sealed through a sealant, and at the same time, the sealing shape conforms to the shape of a wall corner. The gap between the thermal insulation board and the wall corner is reduced to make no moving space is allowed when the thermal insulation board is stressed, and the problem of the external surface cracking caused by the easy movementof the thermal insulation board is solved.

The invention discloses a core filling composite thermal insulation block self-thermal insulation wall. The wall includes a crossbeam in horizontal arrangement and columns in vertical arrangement; thermal insulation blocks are arranged in the space formed by the crossbeam and the two columns in rows through a dislocation manner; the thermal insulation blocks have left and right internal cavities;the left and right internal cavities are filled with thermal insulation rock wool boards, and communicate with each other through isolation bridges in horizontal arrangement; the outer surfaces of thethermal insulation blocks are bonded with a putty layer through masonry mortar; and the outer surface of the putty layer is coated with a primer layer. The mass of the whole wall can be lighter through core filling processing in the internal cavities; the intensity of the whole wall can be enhanced by using the isolation bridges to connect the internal cavities, so that good thermal insulation effects of the whole wall can be achieved; and through the arrangement of putty and primer on the thermal insulation blocks in advance, the problems of easy hollowing and cracking of traditional self-thermal insulation walls can be effectively solved.

The embodiment of the invention provides a dielectric filter and electronic equipment. The dielectric filter includes a filtering portion made of a high dielectric material and having a plurality of coupling holes disposed at predetermined positions of an interface surface and a ground port; each input and output pin comprises a coupling part and an interface part, the coupling parts are in press fit with the corresponding coupling holes in an interference fit mode, and the grounding ports and the interface parts are coupled to a circuit board of the electronic equipment through solder. The input and output pins are in press fit with the coupling holes in an interference fit manner, so that a carrier plate does not need to be used for indirectly assembling the filtering part on the circuit board of the electronic equipment, the miniaturization and the light weight of the electronic equipment are effectively promoted, and the cost can be further reduced.

The invention discloses a steel structure column-to-concrete column building joint structure and a construction method. The steel structure column-to-concrete column building joint structure comprises a steel frame column, and the steel frame column is used for being connected with frame beams forming a building joint; the steel frame column is divided into a steel frame column upper section and a steel frame column lower section through the inner partition plate II; the top of the steel frame column upper section is sealed through the inner partition plate I; a pouring gate is formed in the inner partition plate I, and the steel reinforcement cage is fixed to the inner partition plate II in the mode that the steel reinforcement cage is arranged on the pouring gate in a penetrating mode; the functions of heat preservation, protection, low carbon and energy conservation of the building can be realized; the problems of dewing, cracking and the like caused by the fact that the junction of steel and concrete is easily affected by temperature are solved.

The invention relates to a foundation treatment method under the dynamic load and static load mixing effect of an equipment room, and relates to the technical field of building engineering construction. The method comprises the following steps that (1), manual hole digging piles are constructed on a dynamic load area, and a reinforced concrete bearing platform used for supporting dynamic load generation equipment is constructed after a gravel cushion layer is laid in the top area of the manual hole digging piles; (2), high-pressure jet grouting piles are constructed in a static load area, and a reinforced concrete terrace used for supporting static load generation equipment is constructed after a gravel cushion layer is laid in the top area of the high-pressure jet grouting piles; (3), dividing joints are cut at the connection positions of the reinforced concrete bearing platform and the reinforced concrete terrace and are filled with sealing factice. By means of the foundation treatment method, the manual hole digging piles are adopted for supporting the reinforced concrete bearing platform in the dynamic load area for foundation treatment, and the high-pressure jet grouting piles are adopted for supporting the reinforced concrete terrace in the static load area for foundation treatment, so that the problems that the reinforced concrete terrace is locally sunken, cracks and the like when the equipment room is used later are avoided.