965 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 discloses a preparation method of a low-cost high-performance TiAl alloy engine blade, relates to the technical field of TiAl alloy preparation, and provides a method for preparing the TiAl alloy blade by combining precision casting and vacuum isothermal forging. The process route comprises the steps of prefabricated blank smelting and precision casting, annealing heat treatment, vacuum isothermal forging of a blade final forging piece, heat treatment and blade machining, and compared with a cast blade, the mechanical property is remarkably improved, and the yield is also remarkably increased; compared with a traditional forged blade, the manufacturing cost is greatly reduced due to the fact that the process is greatly shortened; compared with ingot casting / rod casting and high-temperature forging, the method has the advantages that the material utilization rate and the mechanical property are improved, and the manufacturing cost can be reduced; in addition, compared with forging under the atmospheric condition, the problem of severe oxidation does not exist, and the material utilization rate and the mechanical property are obviously improved. Therefore, the method provided by the invention has important commercial value.

The invention relates to the technical field of precision casting, and discloses a high-precision control method for stainless steel castings, which comprises the following steps: preparing raw materials, recording component characteristics of the raw materials, designing a formula proportion of the raw materials, carrying out pouring process design, and setting a parameter control system in each link of pouring, according to the shape of the needed stainless steel casting, mold design and manufacturing and mold quality control are carried out, grinding tool design parameters are recorded, a stainless steel casting solidification process simulation model is established according to raw material component characteristics, a raw material formula proportion, a designed pouring process and the mold design parameters, and the casting solidification process is simulated in the model. The method comprises the following steps: predicting a defect area in a casting production process, carrying out advanced prevention and optimization treatment on the defect area according to the predicted defect area in the casting production process, strengthening a refining degassing operation in a casting process, further carrying out a metal solution purification step after refining degassing, and demolding the casting, and the mold is cleaned, checked and maintained in time.

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 provides a machine learning-based pressure-regulating precision casting gating system design method, which comprises the following steps of: collecting pressure-regulating precision casting data to form a database; screening the parameters in the database to obtain a principal component influence factor; pouring process independent variables are input, and a pouring system model is output based on the principal component influence factors and the pressure maintaining condition in the solidification process; based on the gating system model, anti-gravity pressure regulating casting mold filling simulation is conducted through analogue simulation software, and the porosity is counted according to the simulation result; and comparing the gating system model with a gating system in a database, if the porosity is the minimum value, determining that the gating system model is a target gating system, and exiting the whole process, otherwise, re-optimizing the gating system model. For complex parts in different shapes, an optimal pouring system can be provided, the mold filling capacity in the pouring process is improved, and the forming quality and the casting yield of castings are improved.

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 field of precision casting, and discloses a precision casting process for a stainless steel impeller for nuclear power, which comprises the following steps of: S1, pressing a wax mold by using an investment casting process, and connecting the wax mold into a tree shape by using a wax rod; s2, the surface of the wax mold is coated with a refractory material, dewaxing is conducted through dewaxing equipment after drying, a hollow shell is obtained, and then high-temperature roasting is conducted; s3, selecting duplex stainless steel to be smelted in an electric furnace, heating molten steel to a preset pouring temperature, and pouring the molten steel into the shell from the bottom or the side; s4, the shell is removed after being naturally cooled, and solution treatment is conducted on the impeller; s5, carrying out sand blasting, shot blasting and sand cleaning, and carrying out nondestructive inspection; wherein dewaxing equipment used in the step S2 comprises a tank body, a rotatable tray is arranged in the tank body, and a plurality of adjustable fixing clamps are arranged on the tray to meet the fixing requirements of different shells; the top of the tank body is provided with a feed port, a discharge port and an automatic sealing door, and the bottom is connected with a wax liquid collecting tank and is internally provided with a liquid level sensor; the inner wall of the tank body is provided with a heating cavity for containing heating elements, and the outer wall is wrapped with heat insulation materials.

The invention relates to the technical field of casting machining drilling, and discloses a precision casting machining drilling device which comprises a fixing ring, a multi-directional positioning mechanism, a precision casting supporting mechanism and a drilling mechanism, and supporting legs are welded and distributed at the position, close to the edge, of the bottom of the fixing ring; the multi-directional positioning mechanism comprises a rotary sliding mechanism, a positioning clamping mechanism and a driving structure, the rotary sliding mechanism is connected to the upper portion and the lower portion of the fixing ring in a limiting and sliding mode, the positioning clamping mechanism is fixedly distributed on the inner side wall of the rotary sliding mechanism, and the driving structure is connected to the left end of the upper portion of the rotary sliding mechanism; the precision casting supporting mechanism is arranged in the middle of the bottom of the fixing ring. And the drilling mechanism is arranged above the fixing ring. According to the precision casting machining drilling device, multi-angle positioning and clamping of precision castings can be achieved through the driving structure, automatic adjusting and supporting can be conveniently conducted according to the precision castings of different heights, meanwhile, the drilling depth can be dynamically adjusted in a lifting mode, and the machining precision is further improved.

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 relates to the technical field of precision casting of turbine blades, in particular to a ceramic core for a nickel-based superalloy isometric crystal hollow turbine blade and a preparation method of the ceramic core. The ceramic core is prepared by mixing refractory powder and a paraffin-based plasticizer and then sintering the mixture at a high temperature, and the mass ratio of the refractory powder to the paraffin-based plasticizer is (75-85): (15-25); the refractory powder is composed of quartz glass powder, alumina powder and natural crystalline flake graphite, and the mass ratio of the quartz glass powder to the alumina powder to the natural crystalline flake graphite is (72-77): (20-25): (0.5-3); the paraffin-based plasticizer is prepared from refined paraffin, beewax and low-density polyethylene, and the mass ratio of the refined paraffin to the beewax to the low-density polyethylene is (40-50): (40-50): (5-10). The natural flake graphite is creatively added into the raw materials of the ceramic core, so that the flowability of slurry is improved, the high-temperature bending strength of the ceramic core is improved, and the depoling performance of the mold core is improved.

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 discloses a method for forming a complex and compact cavity precision casting based on a 3D printing ceramic core, and belongs to the technical field of precision casting. The ceramic core of the whole casting inner cavity structure is directly formed through the 3D printing technology, and the number and types of tools and cores needed during casting wax mold forming can be reduced; errors generated during splicing of the mold cores are fundamentally eliminated, the machining precision is improved, meanwhile, the machining difficulty can be reduced, particularly forming of fine structures such as narrow edges and sharp corners is facilitated, the ceramic mold core and a casting shell can form an assembly together, the inner cavity structure of a casting does not need to be manufactured during shell manufacturing, and the production cost is reduced. And the difficulty during shell manufacturing is greatly reduced, the problem of refractory material accumulation or cavity in the deep groove and narrow groove part in the shell manufacturing process is avoided, the risks of looseness and steel leakage of the deep groove and narrow groove part of the casting are reduced, and technical support is provided for achieving automatic shell manufacturing of the high-integration complex compact cavity precision casting.

The utility model discloses a precision casting furnace, relates to the technical field of casting furnaces, and aims to solve the problems that an existing casting furnace is lack of an auxiliary limiting mechanism for a crucible, the placement position of the crucible is inconvenient to control, and materials are heated unevenly. According to the technical scheme, a base for supporting and limiting a containing container is arranged in a heating cavity, a sliding way is formed in the base, a limiting mechanism is arranged between a sliding seat and the base, and a groove and a limiting rod are arranged on the sliding seat; a sliding seat is arranged on the base, a clamping mechanism for a containing container is arranged on the base through a mounting seat, the clamping mechanism corresponds to the sliding seat in position, the base is arranged in the heating cavity, the containing container is placed on the sliding seat, a limiting mechanism is arranged between the sliding seat and the base, and through the arrangement of the limiting mechanism, the containing container can be clamped through the clamping mechanism. And a worker can conveniently determine the placement position of the containing container, so that the containing container is located in the middle of the heating cavity, materials in the containing container are uniformly heated, and the heating time is shortened.

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 discloses a large-scale semi-continuous fixed-point pouring type precision casting furnace and an application method thereof, and the precision casting furnace comprises a smelting cavity, the bottom of which is of a height-adjustable structure; the movable cavity is adjustably mounted on one side of the smelting cavity; the mold cavity is mounted on the other side of the smelting cavity; the isolating valve is mounted between the mold cavity and the smelting cavity; the feeding temperature measuring cavity is mounted at the top of the smelting cavity; the rail group is mounted on one side, far away from the smelting cavity, of the mold cavity, at the bottom of the inner side of the mold cavity and at the bottom of the inner side of the smelting cavity; the furnace body is arranged on the movable cavity; and the mold assembly is arranged on the track group. The height of the mold assembly can be adjusted through the smelting cavity, meanwhile, the horizontal position of the furnace body can be adjusted through the movable cavity, in this way, adjustment in the vertical direction and the horizontal direction between the mold assembly and the furnace body can be achieved, alignment of the furnace body and the mold assembly is facilitated, and the problem that molten metal leaks and splashes in the casting process can be solved under the condition that a funnel is not arranged.

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 technical field of high-temperature alloy precision casting, and particularly relates to a high-porosity ceramic crucible with a large-particle skeleton structure and a preparation method. According to the method, a traditional crucible forming method is abandoned, a framework made of a large-particle material is firstly constructed, then gaps between the frameworks are accurately filled with a specific filling material, and therefore forming of the crucible is completed. Wherein the framework material comprises the following raw materials in parts by weight: 50-65 parts of 3-5mm white corundum, 30-45 parts of 1-3mm white corundum, 3-4.5 parts of gel powder, 0.5-2 parts of high-alumina cement and 5-8 parts of additional water; the filling material comprises the following raw materials in parts by weight: 20-45 parts of 0-120-mesh white corundum, 25-35 parts of alpha-alumina powder, 30-40 parts of silica sol and 0.5-1 part of an external surfactant. The basic strength of the crucible is stabilized, and the thermal shock resistance of the crucible is remarkably enhanced by optimizing the internal pore structure of the crucible.