789 results about "Precision casting" patented technology

The invention relates to the technical field of machine tool casting detection, and discloses an automatic detection system for surface defects of machine tool precision castings. The system comprises a surface information acquisition core module, a first defect identification core module, a second defect identification core module and a defect type fusion core module. The surface information acquisition module is used for synchronously acquiring real-time optical images and process parameter data in production aiming at the surface of the casting part, and constructing a defect diagnosis characteristic spectrum and an auxiliary text according to the real-time optical images and the process parameter data; the first defect recognition module inputs the atlas and the auxiliary text into a pre-training double-flow convolutional neural network to generate a first classification result of defect types; a second defect identification module extracts defect mechanism characteristic values from the atlas and matches the defect mechanism characteristic values with a pre-stored defect mechanism knowledge base to obtain a second classification result; and the defect type fusion module fuses the two types of results to determine a target defect type. The system solves the problems of single detection information and identification deviation in the prior art, improves the detection accuracy and real-time performance, and meets the requirements of different production scenes.

The invention relates to the technical field of new energy aluminum alloy precision casting multi-modal quality monitoring, in particular to a new energy aluminum alloy precision casting multi-modal quality monitoring device and method. According to the technical scheme, the new energy aluminum alloy precision casting multi-mode quality monitoring device comprises a quality monitoring device body, an infrared thermal imager probe, a germanium single crystal protection lens, an integrated spectrometer probe debugging port, an acoustic detection microphone array and a honeycomb acoustic shielding cover. An infrared thermal imager probe is arranged on one side of the quality monitoring device main body, and a germanium single crystal protection lens is arranged on the outer side of the infrared thermal imager probe; synchronous acquisition and fusion analysis of multi-physical field data are realized by integrating six modes of spectrum, infrared thermal imaging, vibration, machine vision, acoustics and pressure deformation, and meanwhile, when the shrinkage risk is predicted by the infrared thermal imaging, a die-casting process compensation mechanism is automatically triggered to kill defects in the germination stage, so that the defect rate is greatly reduced.

The invention provides a casting deformation compensation method based on point cloud, and belongs to the crossing field of three-dimensional digital detection and precision casting technology, and the method comprises the steps: carrying out the Gaussian filtering and edge point detection of a casting point cloud, sampling an edge point detection result to obtain a source point cloud, registering the source point cloud to a template point cloud coordinate system of a casting through ICP registration, and obtaining a point cloud coordinate system of the casting; obtaining an initial registration point cloud; respectively acquiring a registration feature point set and a template feature point set of the initial registration point cloud and the template point cloud by using SIFT, acquiring a rough matching pair set according to the feature point distance, and performing robust matching on the rough matching pair set to obtain a fine registration point cloud; performing deformation compensation on the fine registration point cloud based on local affine transformation and multi-scale deformation mapping to obtain a final registration point cloud; dividing the final registration point cloud into a rigid layer point cloud and a non-rigid layer point cloud; and transforming the final registration point cloud by using the global transformation matrix to obtain a compensation point cloud. The deformation compensation precision and efficiency of the casting can be effectively improved.

The invention relates to the technical field of digital twinning, and discloses a precision casting mold life prediction method based on digital twinning, which comprises a mold data acquisition module, a mold data processing module, a mold coefficient generation module, a prediction model establishment module and a mold life prediction module. Physical data, operation data and maintenance records are synchronously collected through the multi-source sensor, and full-life-cycle real-time monitoring is achieved; establishing comprehensive evaluation of four types of quantization coefficients, thermal fatigue coefficients, comprehensive mechanical coefficients, comprehensive wear coefficients and comprehensive maintenance coefficients to realize multi-field damage coupling analysis; the life prediction index unifies the multi-dimensional damage to be 0-1 standard, outputs a visual life percentage and sets a graded early warning threshold value, so that the prediction precision is improved; all coefficients are calculated through a standardized formula, a full-digital process from data acquisition to index generation to model prediction to decision support is constructed, and the detection requirements of new materials and complex structure molds are met.

The utility model relates to the technical field of mold shell pouring equipment, in particular to a precision casting mold shell vacuum pouring device which comprises a pouring seat, a bottom plate is arranged at the bottom of the pouring seat, a vibration mechanism is arranged between the bottom plate and the pouring seat, and a fixing column, a sealing groove and a mold groove are arranged at the top of the pouring seat. A top plate is fixedly mounted at the top end of each fixing column, a movable plate is arranged on the outer side of each fixing column in an attached and sleeving mode, an upper mold plate and an annular protruding block are fixedly mounted at the bottom of each movable plate, a pressure suction pipe is arranged at the top of each movable plate in a sealed and penetrating mode, and a sealing pressure spring is fixedly mounted on the inner wall of the bottom end of each sealing groove; according to the vacuum pouring device for the precision casting mold shell, by means of the structural design in the vibration mechanism, flowing and distribution of a mixture in the pouring process are facilitated, formation of air holes and shrinkage cavities in the mold shell is reduced, and the density and the surface quality of a casting are improved.

The invention relates to a precision casting part surface defect automatic detection system, and relates to the casting part detection equipment technical field, the precision casting part surface defect automatic detection system comprises a workbench, the workbench is provided with a positioning assembly, a frame body, a detection mechanism, a marking assembly and a driving mechanism, the positioning assembly is used for fixing a to-be-detected product on the workbench; the frame body is connected to the workbench and provided with a standard casting part curved plate, and the curved plate and a to-be-detected product are oppositely arranged in parallel. The detection mechanism comprises a telescopic pipe assembly, when the surface of the to-be-detected product has defects, the length of the telescopic pipe assembly changes accordingly, the marking assembly comprises a first liquid containing box and a second liquid containing box which contain marking liquid of different colors, and when the telescopic pipe assembly stretches and retracts, the marking assembly can control the marking liquid of different colors to mark the defect positions of the to-be-detected product; the driving mechanism is used for driving the telescopic pipe assembly to move in the horizontal direction. The special-shaped curved surface casting part detection device can accurately detect the special-shaped curved surface casting part, and has the effect of marking the surface defects of the casting part.

The invention discloses a vacuum negative pressure vibration assisted precision casting forming method. The method comprises the steps of model preparation, sand box and dry sand pretreatment, layered vibration sand filling, film covering vacuumizing, molten metal smelting and purification treatment, negative pressure vibration pouring, pressure maintaining solidification, segmented temperature control and pressure relief box opening and multi-stage cleaning aftertreatment. The core of the method is that mechanical vibration and a vacuum negative pressure technology are deeply coordinated and penetrate through the whole process of modeling, pouring and solidification, and meanwhile, a series of fine control means such as dry sand accurate pretreatment, molten metal rotary blowing degassing and instantaneous inoculation, stepped negative pressure control, temperature-related segmented pressure relief and two-stage shot blasting cleaning are matched; through dynamic cooperation of vibration and negative pressure, the sand mold compaction uniformity, the molten metal mold filling capacity and the solidification feeding effect are remarkably improved, the casting defects of air holes, shrinkage porosity, insufficient pouring and the like are effectively reduced, and the internal density, the size precision and the surface quality of a casting can be remarkably improved.

The invention relates to the field of precision casting, and particularly discloses a gas turbine blade centre hole depth measuring method, which comprises the following steps: analyzing a centre hole section structure and a magnetic bead contact state size through UG drawing software, performing sectioning analysis on a gas turbine blade centre hole axis surface, performing tangent constraint on a magnetic bead contour and a centre hole inner contour, and determining the depth of the centre hole; measuring the distance from the center of the magnetic bead to the inner end of the centre hole; putting the magnetic bead into the centre hole of the blade, measuring the center position of the magnetic bead by adopting a three-coordinate measuring instrument, and calculating the actual centre hole depth of the blade by combining the dimension guarantee of the three-coordinate measuring instrument on the profile tolerance of the inner wall of the centre hole; according to the method, by means of the tangent constraint of the magnetic bead and the centre hole in the blade tenon, the hub degree of the magnetic bead is measured through the three-coordinate measuring instrument, the depth of the centre hole is calculated, the depth of the centre hole can be accurate to 0.01 mm, the measurement precision is high, and the precision of follow-up positioning and clamping machining of the gas turbine blade through the centre hole is guaranteed.

The invention relates to the technical field of crack detection, in particular to a crack detection method, device and system for a precision casting. The method comprises the following steps that all-directional sound wave scanning is conducted on the precision casting, sound wave reflection signals are collected, dynamic sound wave imaging mapping is conducted, and a casting three-dimensional space voiceprint graph is constructed; performing transient abrupt change phase position calculation and casting crack space positioning on the casting three-dimensional space voiceprint graph to obtain three-dimensional space position information of casting cracks; based on the three-dimensional space position information of the casting crack, high-frequency magnetic field excitation processing is conducted on the precision casting, an amplitude change curve, a phase change curve and a frequency change curve are obtained through calculation, and crack three-dimensional shape calculation is conducted according to the amplitude change curve, the phase change curve and the frequency change curve to obtain crack three-dimensional shape characteristics. According to the invention, rapid and accurate precision casting crack detection is realized.

The invention provides a fracture-resistant and tensile cement-based material based on a bionic structure and a preparation method thereof, and belongs to the field of building materials.The cement-based material comprises a plurality of cement-based slurry layers stacked layer by layer and fiber materials scattered in the cement-based slurry layers, the fiber material comprises at least one of steel fibers and non-metal fibers; the arrangement directions of the fiber materials in the same cement-based slurry layer are the same, and the projection included angle theta of the arrangement directions of the fiber materials in the adjacent cement-based slurry layers meets the following conditions that theta is larger than or equal to 30 degrees and larger than or equal to 0 degree or theta is larger than or equal to-30 degrees and smaller than or equal to 0 degree. According to the method, a discontinuous stacking structure simulating the nanoscale of a biological shell is applied to the structural design of a cement-based material, common Portland cement is adopted as a base material, discontinuous fibers are adopted as an auxiliary reinforcing material, and the bionic structure is formed through precise pouring forming; and the cement-based material has excellent mechanical properties such as ultrahigh pressure resistance, fracture resistance and tensile strength.

The invention provides a preparation method of a sand mold forming mold shell for titanium alloy precision investment casting, which comprises the following steps: S1, carrying out sand mold 3D printing on a three-dimensional sand mold to obtain a sand mold model; s2, a 3D printing spray gun is adopted for spraying the sand mold, the total spraying thickness is controlled to be 0.5-1 mm, low-temperature wax is adopted as a spraying raw material, and the model is K512; s3, a mold shell is prepared; s4, roasting and sand removal; the step S2 specifically comprises the following steps that S21, low-temperature wax is placed in a spray gun to be preheated, and the preheating temperature ranges from 50 DEG C to 60 DEG C; and S22, the temperature of the spray gun is increased to 60-120 DEG C, and a wax mold is sprayed on the sand mold. According to the preparation method, the 3D printing sand mold can replace a wax mold, and the problems of shrinkage deformation, shrinkage depression and the like of the wax mold are avoided; the spraying gun is used for spraying the 0.5-1 mm wax mould on the sand mould, the thickness is accurate and controllable, the sand mould model obtained by spraying the wax mould is smooth in surface and free of wax marks, the surface quality and the size precision of the titanium alloy casting can be effectively improved, manual finishing is not needed, and the manufacturing cost is low.

The invention relates to the technical field of titanium alloy investment precision casting, and particularly provides a titanium alloy multistage deep blind hole investment casting method which comprises the following steps: designing an exhaust hole and a slag removal hole; establishing a model; assembling and welding; soaking the surface layer in a vacuum negative pressure environment, continuously vacuumizing, deflating after soaking, taking out the module, and rotating to uniformly control the slurry; preparing a surface layer; performing segmented grouting on the deep blind hole; making a shell from a back layer; roasting and molding; washing and drying; pouring is conducted; shell cleaning and sand blasting; sealing and welding the process holes; and performing stress relief annealing. And a dynamic vacuumizing means is adopted, and a vacuumizing device is always kept in an open state, so that the compactness of a surface layer is improved, and burrs of a casting are reduced. Through vacuum dynamic slurry immersion, segmented grouting and collaborative design of the exhaust hole and the slag removal hole, investment precision casting forming of the high-precision oil pump shell can be supported, the shell manufacturing efficiency of the multi-stage deep blind hole is improved, and the filling defect rate is reduced.

The invention relates to the technical field of casting, in particular to vehicle gearbox casting equipment which comprises a support, a supporting plate used for placing a sand casting mold is fixedly connected to the support, a fixing mechanism used for fixing the sand casting mold is arranged above the supporting plate, and a driving mechanism is connected with a material guiding mechanism arranged on one side of the supporting plate. Through a rigid limiting structure of the square fixing frame and the supporting plate, impact of molten metal is resisted, displacement and collapse of a sand mold are avoided, inert gas is synchronously injected to stabilize the sand mold, the defects of sand holes and cold shut are reduced, the casting precision of key parts such as a gearbox bearing hole and an oil duct is improved, the inclusion and porosity are reduced, and the air tightness qualification rate of a shell is improved; the driving mechanism controls lifting, material pushing and vibration demolding in a linkage mode, the production period is shortened, the productivity is improved, the labor cost is reduced, meanwhile, molding sand can be recycled, emission is reduced, green manufacturing is met, and an efficient, high-quality and environment-friendly solution is provided for precise casting of the gearbox shell.

The invention discloses a precision casting manufacturing roasting feeding device which comprises a base, and a sliding seat is transversely arranged on the base in a sliding mode. According to the feeding device, through the arrangement of the rail, the rail wheels and the second driving mechanism, the feeding device can be driven to move along the rail, then feeding can be conducted on multiple pieces of production equipment at the same time through the single feeding device, and through the arrangement of the second driving mechanism, the height of a feeding pipe can be controlled according to the heights of different pieces of equipment; the spiral feeder rotates with the supporting frame as a fulcrum, when the feeding pipe is lifted, the whole feeding pipe moves towards the equipment, when the feeding pipe descends, the feeding pipe is far away from the equipment, the height of the feeding pipe can be adjusted according to the height of the equipment, and meanwhile the feeding pipe can be driven to move synchronously. According to the roasting feeding device for precision casting manufacturing, the feeding pipe is lifted, dislocation of the feeding pipe and a feeding port of equipment after lifting is avoided, feeding can be conducted on the equipment at the same time, and meanwhile the position of the feeding pipe can be adjusted according to the height of the equipment.

The invention relates to the technical field of precision casting, in particular to a casting pouring design method and system based on deep learning. Automatic feature extraction is adopted, and geometric, topological and technological features are automatically extracted from an STP format three-dimensional model of a casting and a pouring system. And constructing a deep learning model, and learning a complex mapping relationship between casting features and a pouring system structure. According to the method, expert experience is fused, casting process rules and expert knowledge are embedded into an AI model through a pre-learning standard model and a structure library, and design reasonability and interpretability are improved. End-to-end generation is adopted, and full-process automation from new casting model input to complete pouring system three-dimensional model output is achieved. The design efficiency is remarkably improved, automatic design from a casting to a pouring system is achieved, and the traditional design period from several days to several weeks is shortened to the minute level. According to the method, the design quality is controllable, and the design is ensured to meet the casting process requirements by embedding a standard model, artificial experience and process rules.

The invention relates to the technical field of investment casting, in particular to an anti-gravity pouring tool and method for aluminum alloy investment precision casting, and the tool comprises a bottom plate and an annular sliding rail; the annular sliding rail is mounted on the top surface of the bottom plate; a pouring hole is formed in the center of the bottom plate; a plurality of sliding blocks are installed on the annular sliding rail in a sliding mode, and each sliding block is provided with a locking structure. A stand column is vertically installed on the top of each sliding block. A transverse pressing rod is installed on each stand column, and a pressing screw is arranged at the cantilever end of each transverse pressing rod in a screwed mode. And the lower end of the pressing screw rod is used for pressing a shell placed on the bottom plate. According to the tool, rapid fixing and stable pouring of the shell are achieved, and the production efficiency is remarkably improved. Compared with a traditional sand filling pouring process, a sand box does not need to be adopted for carrying out sand filling operation, pouring can be carried out after the preheated shell is clamped and fixed through the anti-gravity pouring tool, and the pouring efficiency is greatly improved.

The invention discloses a casting machining and polishing treatment device and method for precision casting, and belongs to the technical field of automatic manufacturing and industrial robots. The multi-axis mechanical arm is mounted on the machining base; the combined treatment head is mounted at the tail end of the multi-axis mechanical arm; the composite processing head comprises an electric spindle grinding machine, a three-dimensional scanner, a structured light projector and a macro camera; and the three-dimensional scanner, the structured light projector and the macro camera are all positioned and mounted by taking the spindle axis of the motorized spindle grinding machine as a reference. According to the motorized spindle grinding machine, a plurality of procedures such as macroscopic scanning, microscopic detection, grinding execution and quality evaluation are physically integrated.

The present invention discloses a precision casting automatic casting device, which relates to the technical field of casting devices. The precision casting automatic casting device includes a base, a cylindrical mold is fixed in the middle of the top end of the base, three support rods are fixed on the outer side of the top end of the base, a frustum is fixed at the top ends of the three support rods, a multi-track linear motor is fixed at the top end of the frustum, a telescopic feeding pipe is embedded in the frustum, and the telescopic feeding pipe is arranged to facilitate casting into the overall combined mold. Three track grooves are formed in the frustum, and three outer mold components are arranged inside the frustum. By arranging three movable outer mold components in the present invention, after the casting and forging are completed in this application, the three movable outer mold components can be controlled by the multi-track linear motor to perform independent unfolding and movement, and there will be no problem of material jamming.

The utility model belongs to the technical field of precision casting dies, and particularly relates to an alloy casting precision casting die which comprises a water tank, a lower die is fixedly connected to the top of the water tank, an upper die is arranged on the top of the lower die, a cooling groove is formed in the lower portion of the interior of the lower die, and cooling circulation pipes are fixedly connected between the two sides of the top of the water tank and the lower die. One ends of the two cooling circulating pipes extend into the lower mold and are respectively communicated with the two ends of the cooling tank; the utility model provides a precision casting mold for an alloy casting, and solves the problems that in the prior art, after the alloy casting is cast, the casting can be demolded and taken out after being naturally cooled, but the natural cooling is very time-consuming, the casting is tightly adhered to a mold groove, and the casting cannot be taken out after being naturally cooled. As a result, labor burden is increased while the demolding efficiency is reduced, the casting cannot be quickly cooled and molded, the casting cannot be quickly demolded, and the residual heat of the mold and the casting can scald workers during demolding work.

A complete investment casting experiment is carried out around an autonomously designed turbine blade mold, S1, S2 and S3 section sizes of a casting in different stages are collected, and a time sequence data set is established, including mold, wax pattern, directional solidification, mold shell removal, pouring system removal and ceramic core constraint removal. Analysis shows that the average deviation of the casting size evolves continuously in different stages (from 0.2134 mm to 0.1857 mm), deviation accumulation is achieved, and the influence degrees of all the stages are different. In order to effectively capture the changes of the casting, an LSTM neural network is adopted to mine size deep features and establish a time-varying model. The result shows that the LSTM considers the deformation history by virtue of the unique door structure, the prediction value of the average deviation of the casting in a single-step prediction task is 0.1832 mm, and the test average absolute percentage error (MAPE) is 1.35%; the MAPE of the multi-step prediction is 2.99%, and the MAPE of the final step is 6.63%. The research provides a new thought for intelligent development of the field of investment casting.

The invention belongs to the field of precision casting, and provides a preparation method of an oversized high-temperature alloy precision casting thin-wall casing, which comprises the following steps of: 1, preparing a casing split wax mould, welding an integral wax mould, designing a casing split wax mould structure and a mould structure, pressing the split wax mould, correcting and cooling the split wax mould, and assembling and welding; 2, large-size cartridge receiver modules are combined, and a cartridge receiver wax mold module is formed; 3, preparing a large-size casing ceramic shell, namely uniformly coating the surface of a wax mold with surface layer slurry with a refiner by adopting a spraying tool, spraying sand and drying, coating a transition layer and a back layer layer by layer, spraying sand, sealing the slurry and drying after 20 layers of the shell are coated, feeding into a steam dewaxing kettle, dewaxing, and roasting; 4, smelting and pouring a casing casting, and slowly cooling the poured casting; and 5, post-processing the casting. According to the method, precision casting forming of the oversized casing is achieved, the critical size of a high-temperature alloy precision casting casing casting reaches the CT7 level, and metallurgical defects meet the requirements of the casting.

The invention relates to the technical field of casting, in particular to a precision casting shell making machine which comprises a hoisting part. The hoisting part comprises a driving piece and a hoisting mechanism, the hoisting mechanism is mounted on the driving piece, and the hoisting mechanism comprises a shell, a hanging basket, a sensing assembly and two hanging rods. The two hanging rods are eccentrically arranged on the shell and can rotate along with the shell. The hanging basket comprises a main rod and two hanging arms, and the main rod is connected with a fired mold; and the suspension arm is connected with a lifting hook on a corresponding suspension rod. The induction assembly is installed on the shell. According to the precision casting shell making machine, the axial relative displacement of the suspender is monitored through the induction assembly, eccentricity of a fired mold is fed back, after workpieces in the same batch are cast for multiple times, position exchange is achieved through rotation of the suspender and the shell, the suspender on the high-abrasion side and the suspension arm on the low-abrasion side can be matched again, the abrasion degree of the two sides is balanced, and the precision casting shell making machine is suitable for large-scale production. And the service life of the whole hoisting part is prolonged.

The invention provides a shell production line scheduling method and device based on a genetic algorithm and a program product, and relates to the technical field of precision casting. The method comprises the following steps: acquiring production process data of a plurality of workpieces to be scheduled and a plurality of scheduled workpieces; based on a genetic algorithm, generating a plurality of initial production sequences of the plurality of scheduling workpieces according to production process data formed by the plurality of workpieces to be scheduled and the plurality of scheduled workpieces; performing coding operation on the plurality of initial production sequences according to a preset coding rule to obtain codes of the plurality of initial production sequences; determining genetic algorithm parameters; performing constraint inspection, selection, crossover and mutation operation on the codes of the plurality of initial production sequences, and determining production scheduling results of the plurality of production scheduling workpieces; the production efficiency of the shell manufacturing production line is improved.

The invention discloses modified precision casting wax as well as a preparation method and application thereof. The modified precision casting wax is prepared from the following raw materials and components in parts by mass: 17 to 25 parts of microcrystalline wax, 10 to 15 parts of paraffin, 5 to 10 parts of stearic acid, 2 to 4 parts of ethylene-vinyl acetate, 2 to 6 parts of lignite wax, 2 to 5 parts of Piccotex75 resin, 10 to 15 parts of terpene resin, 5 to 15 parts of D-mannitol, 5 to 15 parts of adipic acid, 8 to 15 parts of rosin glyceride, 1 to 3 parts of carnauba wax, 2 to 5 parts of candelilla wax, 1 to 3 parts of hydroxyethyl cellulose and 0 to 3 parts of starch. According to the modified precision casting wax disclosed by the invention, the performance of a wax mold is improved by compounding functional aids, so that the modified precision casting wax has high bending hardness and surface hardness, lower shrinkage rate and good dimensional stability, and can be widely applied to the field of high-precision casting.

The invention provides a preparation method of a zirconium acetate surface layer shell for titanium alloy precision investment casting, which comprises the following steps: S1, taking a zirconium acetate binder and an anti-redissolution inhibitor, adding an adhesion promoter and deionized water under a stirring condition, and uniformly stirring to obtain a surface layer binder; s2, mixing a surface layer binder with the surface layer refractory powder, adding a wetting agent, and uniformly dispersing the materials to obtain a surface layer coating; s3, performing vacuum negative pressure defoaming on the surface layer coating; s4, in a vacuum negative pressure state, after the wax mold is subjected to uniform slurry soaking in the surface layer coating and pressure maintaining is conducted for 60-300 s, sand spraying and drying are conducted on the wax mold subjected to slurry soaking, and a surface layer shell is obtained; s5, a dewaxing hole of the surface layer shell is opened, and staged hot steam dewaxing is carried out; s6, the dewaxed surface layer shell is roasted, and a shell is obtained; according to the method, redissolution of the zirconium gel surface layer can be effectively inhibited, the compactness of the surface layer can be improved, and the conditions of redissolution, peeling, falling and the like of a zirconium gel surface layer shell process in titanium alloy precision investment casting can be obviously improved.

The invention provides a cement-based composite material based on a bionic structure and a preparation method thereof, and belongs to the field of building materials.The cement-based composite material comprises a plurality of cement slurry layers and a plurality of non-metal continuous fiber layers which are alternately stacked layer by layer; steel fibers are mixed in the cement slurry layers, and the steel fibers in the same cement slurry layer are arranged in the same direction; the non-metal continuous fibers in each non-metal continuous fiber layer are arranged in the same direction; and the projection included angle theta between the steel fibers in any cement slurry layer and the nonmetal continuous fibers in the adjacent nonmetal continuous fiber layer meets the following condition: 5 degrees is greater than or equal to theta. A discontinuous fiber stacking structure is improved, a rigid discontinuous steel fiber and flexible non-metal continuous fiber alternate stacking structure is adopted, and a bionic structure is formed through precise pouring forming, so that the cement-based composite material has ultrahigh tensile strength and strain performance.

The invention provides a precision casting and friction welding digital manufacturing method for a basic part of an aero-engine, which specifically comprises the following steps of: 1, preparing a blade by adopting a high-temperature alloy material through a precision single crystal casting process; 2, a titanium alloy / high-temperature alloy / carbon fiber composite material is adopted for preparing a blisk / turbine disk; 3, the blades and the blisk / turbine disc are connected through a linear friction welding technology, and connection of homogeneous or heterogeneous metal or nonmetal is achieved; 4, in the linear friction welding process, data of vibration and force-heat multi-frequency key factors are collected, and support is provided for construction of a digital twinborn model; and 5, a digital twinborn model of the linear friction welding process is constructed based on the collected data. According to the method, key factors such as vibration and force heat in the linear friction welding process are collected and reconstructed, the digital twinborn model is constructed, the welding process can be monitored in real time, the welding quality can be predicted, and a basis is provided for welding process optimization and component performance evaluation.

The invention discloses a 3D printing inorganic binder system based on infrared heating hardening and a sand mold preparation method, and particularly relates to the technical field of casting 3D printing. The invention discloses a 3D printing inorganic binder system based on infrared heating hardening. The system is composed of two independent liquids including an inorganic binder and a reinforcing agent. A sand mold preparation method based on the 3D printing inorganic binder system in claim 1 comprises the following steps: (1) premixing a reinforcing agent and silica sand; (2) laying the premixed sand on a printing platform through a sand laying device; (3) spraying an inorganic binder in a set area by adopting a 3D printing nozzle; (4) curing layer by layer through an infrared heating device; and (5) repeating the steps (2)-(4) to finish sand mold printing, and finally removing floating sand to obtain a molded sand mold. According to the method, the adaptability of a sand mold manufacturing process is improved, the interlayer bonding performance of the sand mold is optimized, the structural stability of the sand mold is enhanced, the casting forming quality is improved, the size control precision is improved, and the precision casting requirement is met.

The invention discloses an electric power fitting multi-mold-cavity cooperative precision casting forming process and equipment, which comprises an opening and closing frame, a forming mold, a mold cavity, a mold cavity, a mold cavity, a mold cavity, a mold cavity, a mold cavity, a mold cavity, a mold cavity, a mold cavity, a mold cavity, a mold cavity, a mold cavity, a mold cavity, a mold cavity, a mold cavity, a mold cavity and an opening and closing frame, the mold cavity is in sliding connection with the opening and closing frame; the cleaning assembly is fixedly connected to the bottom of the inner cavity of the opening and closing frame; and the vibration assembly is fixedly connected to the inner surface of the forming mold, and the position, close to the vibration assembly, of the forming mold is fixedly connected with a cooling pipe frame. According to the electric power fitting multi-mold-cavity cooperative precision casting forming process and casting forming equipment, the two cleaning assemblies are arranged on the opening and closing frame, the cleaning assemblies ascend and descend to clean a forming mold and a casting mold which are subjected to demolding, the vibration assembly generates vibration in the material injection process, and the situation that bubbles left by raw materials affect the product forming quality is avoided.

The invention relates to a pneumatic feeding mechanism and a control method thereof. The mechanism comprises a driving unit, a chain transmission unit, a pneumatic clamping unit and a control system. The driving unit drives a chain wheel through a motor speed reducer to drive the loop chain to lift; one end of the ring chain is connected with the pneumatic clamping unit and the other end is connected with the balancing weight; the pneumatic clamping unit comprises a clamping air cylinder, a clamping rod and a bar clamp and is connected with an external air source through a spiral air pipe. The control system monitors the lifting position and speed in real time through a rotary encoder, and precise control is achieved. Through the innovative chain transmission and pneumatic clamping collaborative design and in combination with an intelligent control method, the problems that an existing feeding mechanism is too high in height, poor in stability and insufficient in control precision are effectively solved, and the feeding mechanism is particularly suitable for the vacuum precision casting furnace environment with the limited floor height. The overall height of the mechanism is reduced by more than 30%, the positioning precision reaches + / -0.5 mm, and the operation reliability is remarkably improved.