283 results about "Casting defect" patented technology

The invention relates to the technical field of metal ultrasonic detection, and discloses a method for performing nondestructive flaw detection on a casting by using ultrasonic waves and a flaw detection system.The method comprises the following steps that rapid modeling and acoustic reference calibration are performed on equipment and a workpiece, and a unified coordinate system, a sound velocity delay reference and an optimal sound beam path are obtained; acquiring and caching multi-view ultrasonic echoes in real time to obtain a high-integrity original data stream; implementing adaptive noise diffusion based on the data stream, and constructing a diffusion data stack matched with scattering characteristics; performing scattering compensation inverse diffusion and super-resolution fusion on the diffusion stack to obtain a high-resolution purified echo image; performing closed-loop regulation and control on image quality indexes, and optimizing scanning parameters in real time; and combining the optimized image and scanning parameters, and adopting a segmentation network and online increment fine tuning to realize defect identification and automatic grading. The system has high resolution, real-time performance and self-adaptive closed-loop control, and the reliability and the accuracy of casting defect detection are remarkably improved.

The invention discloses a conformal cooling device for die-casting die temperature intelligent control and a regulation and control method. The conformal cooling device comprises a die body, an embedded conformal cooling runner network, a multi-mode temperature sensing array, a partition flow regulation and control valve group, a central cooperative controller and a cooling medium circulation supply unit. Through the combination of shape follow-up runner design and partition dynamic regulation and control, a cooling blind area is effectively eliminated, the surface temperature uniformity of a cavity is remarkably improved, and the cooling time of a hot spot area is shortened, so that the defects of shrinkage cavities, hot cracks and the like are inhibited, and the defect rate of castings is reduced. And under the cooperation of multi-mode sensing and intelligent control, the system response is accelerated, the energy consumption is reduced, the die-casting rhythm is shortened, and the synchronous optimization of the production efficiency and the energy utilization efficiency is realized.

The invention discloses a casting defect infiltration type detection system, and relates to the technical field of casting defect detection. A permeation control mechanism is arranged on a permeation station, the permeation control mechanism comprises a walking power assembly arranged on a guide rail in a sliding mode, two sets of steering guide grooves are formed in the inner wall of a steering control cylinder in an annular array mode, a pipe body casting part is clamped and fixed between rotary clamping parts, and a steering guide part is arranged between the two steering guide grooves in a sliding mode; the steering control cylinder is sleeved with the casting clamping assembly, the steering guide piece slides along the steering guide groove to achieve 90-degree rotation of the pipe casting, and a penetrant output part is arranged on the inner side of the penetrant storage box and used for conveying a penetrant in the penetrant storage box into the pipe casting. The penetration station, the washing station, the drying station, the spraying station and the detection station are sequentially arranged in the direction of the guide rail, and the penetration control mechanism is arranged on the penetration station, so that the defects of the inner wall of the pipe body casting part can be automatically detected.

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 belongs to the technical field of vacuum centrifugal casting and vacuum induction melting, and particularly relates to a complex thin-wall casting vacuum induction remelting pouring temperature gradient control device and method, and the device comprises a calculation system, a temperature measurement mechanism, a rapid induction remelting mechanism and a bottom pouring crucible; the calculation system is used for achieving simulation calculation of rapid induction remelting and bottom pouring of the alloy ingot, and the temperature measuring mechanism outputting target remelting characteristic parameters is used for measuring temperature changes and temperature gradient distribution of the top, the middle and the bottom of the alloy ingot in the remelting process in real time. The rapid induction remelting mechanism is used for melting the alloy ingots and achieving the melting sequence of the alloy ingots from top to bottom and from outside to inside. By means of the high-temperature alloy remelting device, the problem that in the high-temperature alloy remelting process, due to the fact that the temperature gradient is disordered, alloy is completely melted or part of alloy liquid flows out from the bottom firstly is effectively solved, and casting defects are reduced.

The invention relates to the field of single-crystal high-temperature alloy directional solidification casting defect prediction, in particular to a single-crystal blade freckle defect prediction method based on a large-module casting technology, which comprises the following specific steps of: establishing a 1 / 8 model of a large-module casting system by using modeling software; thermophysical parameters of the single-crystal high-temperature alloy are calculated, and the heat exchange coefficient among the casting, the mold shell and the water cooling disc in the numerical simulation process is determined in combination with related literatures; carrying out directional solidification numerical simulation, analyzing the change of the morphology of the pasty area in the solidification process, and counting the inclination angle of the pasty area of each part of the casting; establishing a Rayleigh number prediction formula, and comparing and analyzing a freckle high inclination area of a simulation result and a freckle occurrence position of an experiment result; and improving a Rayleigh number prediction formula by combining the inclination angle of the pasty area and the transverse temperature gradient value to obtain a Rayleigh number prediction result with more accurate prediction. According to the method, the position and tendency of freckles possibly appearing on the casting are predicted in advance by means of numerical simulation, and the freckle defect is avoided.

The invention discloses an adjustable concrete vibrating device, which belongs to the technical field of building construction appliances, and comprises a vibrating rod connected with an output line, a winding and unwinding assembly and an output assembly, the take-up and pay-off assembly is connected with the output line and used for adjusting the position of the vibrating rod up and down; the output assembly is connected with the retracting and releasing assembly, and the vibrating frequency of the vibrating rod is controlled through the rotating speed. The folding and unfolding assembly has a high-position state and a low-position state; when the retracting and releasing assembly is in a high-position state, the vibrating rod vibrates at a first frequency; and when the retracting and releasing assembly is in the low-position state, the vibrating rod vibrates at the second frequency. According to the method, high-frequency vibration is carried out in a high-position state to break and remove initial casting defects, bubbles are discharged to the maximum extent through high-frequency vibration, holes are prevented from being formed after hardening, low-frequency vibration is carried out in a low-position state to restrain segregation and layering, a vibration rod makes contact with a formwork or bottom-layer steel bars when sinking to the bottom, and the situation that aggregate collision energy can be amplified through high-frequency vibration is avoided.

The application discloses a hollow noise-reducing light-weight hub and a hub mold, which comprise a rim and spokes, the rim is provided with an outer window and a gas port, a hollow cavity is arranged in the rim, the hollow cavity is provided with a first aperture at the outer window and a second aperture at the gas port, and a third aperture is arranged on the back side of the spoke; the above structure makes the wall thickness of the rim uniform, casting defects are not easy to occur, noise can be reduced, the hub can be lightened, and the weight of the hub is lighter than that of an existing hub; the mold comprises a lower mold, a sand core and an upper mold; the lower mold is provided with a boss portion and a groove portion, the boss portion is provided with a first recess and a second recess; the main body of the sand core is provided with a first convex portion and a second convex portion; the upper mold is press-fitted on the sand core, the bottom of the upper mold is provided with an arc pressing portion, the arc pressing portion is arranged above the groove portion, the arc pressing portion is in contact with the top surface of the boss portion, the lower mold, the sand core and the upper mold are assembled and fixed, and product casting is completed.

The invention discloses an aluminum alloy casting defect identification method and system based on image analysis, and relates to the technical field of image analysis. According to the aluminum alloy casting defect identification method based on image analysis, multi-modal image data of a to-be-detected aluminum alloy casting is obtained, registration processing is carried out, and the to-be-detected aluminum alloy casting is divided into a plurality of analysis areas; based on the unified coordinate system, respectively acquiring corresponding areas of the visible light, the thermal image and the X-ray transillumination image in each analysis area, and extracting visible light, thermal image and X-ray transillumination characteristics of the corresponding analysis area; analyzing the corresponding surface texture, temperature gradient and transillumination projection comprehensive index; the method comprises the following steps: performing uniform registration and regionalization analysis on visible light, thermal images and X-ray transillumination images, performing matching analysis on the visible light, the thermal images and the X-ray transillumination images and preset corresponding defect intervals, and judging that an analysis area is a defect area when any index is in the corresponding defect interval. And the limitation that traditional single-mode detection can only identify specific types of defects is broken through.

The invention relates to the technical field of magnesium alloys, in particular to a low-density, high-modulus and ultrahigh-strength magnesium-based composite material and a preparation method thereof.The preparation method comprises the steps that SiC reinforcement particles are pretreated; the raw materials are proportioned according to the mass percent of the components of the magnesium alloy; melting pure magnesium, sequentially adding alloy elements, uniformly stirring, cooling to a semi-solid temperature interval, adding the pretreated SiC reinforcement particles, and casting in a preheating mold to solidify, so as to obtain a magnesium-based composite material cast ingot; the cast ingot is sequentially subjected to solution treatment and extrusion forming; carrying out secondary solution treatment on the magnesium-based composite material bar subjected to extrusion forming; and performing rotary swaging deformation and intermediate annealing treatment on the magnesium-based composite material bar subjected to secondary solution treatment to obtain the ultrahigh-strength magnesium-based composite material. Therefore, the problems that in the prior art, magnesium alloy is insufficient in strength and modulus, a magnesium-based composite material easily generates casting defects and is difficult to deform at room temperature, and the performance of the material is weakened due to grain growth during high-temperature deformation are solved.

The invention discloses a casting defect diagnosis and closed-loop control system and method based on causal anti-fact and multi-agent arbitration. The system collects multi-source data such as temperature, flow, cooling, vision and the like, learns a causal structure, establishes an agent model and solves an adjustment scheme which enables the defect probability to be remarkably reduced in a security domain; performing evidence verification on the suggestions through verifiable generation and a knowledge graph, fusing vision, process, metallurgy and simulation agent arbitration, executing in an edge-cloud double ring, and triggering security rollback abnormally; and when the uncertainty is increased, active learning and incremental updating are implemented. According to the scheme, the defects of shrinkage cavities, air holes and the like can be remarkably reduced, the first-pass yield is improved, and the method is suitable for aluminum alloy sand molds, metal molds and low-pressure casting production lines.

A diaphragm chamber structure of a diaphragm pump belongs to the technical field of diaphragm pumps, and particularly relates to improvement of the diaphragm chamber structure of the diaphragm pump. The diaphragm chamber comprises a diaphragm chamber cover, a rubber diaphragm and a diaphragm cavity, and is characterized in that a cavity is formed in one side of the diaphragm chamber cover, and a pressing part is arranged on the outer circumference of the cavity; a channel is formed in the other side of the diaphragm chamber cover; an inlet and an outlet are respectively formed in two ends of the channel; the cavity is communicated with the channel; a pressing groove corresponding to the pressing part is formed in the diaphragm cavity; and the edge of the rubber diaphragm is clamped and fixed through the mutual matching of the pressing part and the pressing groove. The production cost and the maintenance cost are reduced, the structure is simple, and casting defects in the casting process are reduced.

The invention provides a casting defect detection and identification method and device, equipment and a storage medium, and belongs to the technical field of image data processing. The method comprises the following steps: acquiring a casting image and casting information of a target casting, matching the target casting with a plurality of historical castings according to the casting information, and determining a plurality of reference castings from the plurality of historical castings; each reference casting is divided into a plurality of detection areas, the number of the detection areas of the reference castings is the same, and the positions of the detection areas are corresponding; determining a plurality of to-be-detected areas of the target casting and a detection sequence of the plurality of to-be-detected areas according to the defect frequency of each detection area of each reference casting; sequentially extracting image feature parameters of the to-be-detected areas from the casting image of the target casting according to the detection sequence of the to-be-detected areas of the target casting; and determining defect information of the target casting according to the image feature parameters of the plurality of to-be-detected areas. The casting defect detection efficiency can be effectively improved.

The invention provides a water pump shell casting optimization method based on reinforcement learning. The method comprises the steps of 1, establishing a casting numerical simulation model of a water pump shell; 2, casting process optimization variables are determined, and a data set of process parameters and corresponding casting defect volumes is obtained through orthogonal test design; 3, based on the data set, training a neural network as an agent model to establish a mapping relation from process parameters to casting defect volumes; 4, based on a near-end strategy optimization (PPO) algorithm, taking the proxy model as an environment, carrying out strategy training and optimization solution, and outputting an optimal process parameter combination with the minimum defect volume; according to the method, the forming quality of the complex pump shell can be remarkably improved, casting defects are reduced, meanwhile, the optimal process can be automatically and efficiently found, the development cost is reduced, and the production efficiency is improved.

In order to improve the metallurgical quality of a thin-wall casting in the investment casting process, the invention provides a novel control method based on machine learning and a sequential solidification principle. The method comprises the steps that firstly, geometric structure parameters related to the solidification process are calculated on discretization representation of a casting model, and the geometric structure parameters comprise the distance from a local position to a casting head, the geometric modulus and the mold shell thickness; secondly, in combination with a numerical simulation result, a random forest algorithm is used for establishing a mapping model of geometric structure parameters and solidification time of the casting, and R2 on a verification set is 0.9974; based on the model, the gradient of a solidification curve on a geodesic path is quantitatively adjusted in combination with measures of local formwork thickness reduction and heat preservation cotton coating, and sequential solidification is achieved. And after optimization, the total shrinkage porosity volume of the casting is reduced to 24.78 mm < 3 > from 71.69 mm < 3 >, and is reduced by 65%. The effectiveness of the method is further verified through a pouring experiment, an efficient and quantitative solution is provided for shrinkage porosity control of the thin-wall complex casting, and a new thought is provided for intelligent control over investment casting defects.

The application discloses alloy casting defect detection equipment with intelligent marking function and relates to the technical field of detection equipment. The defect detection equipment comprises a defect sensing system, a marking mechanism, a positioning mechanism, a clamping mechanism and a conveying mechanism. The defect sensing system and the positioning mechanism are fastenedly connected. The marking mechanism and the defect sensing system are fastenedly connected. The positioning mechanism and the conveying mechanism are fastenedly connected. The clamping mechanism and the conveying mechanism are fastenedly connected. The defect sensing system is used for carrying out defect scanning on the surface and the interior of a casting in an ultrasonic wave or electric conductivity mode. The marking mechanism performs coating and solidification color marking operation on a defect area. The clamping mechanism clamps or releases a detected casting, and cooperates to realize multi-angle detection requirement. The detection precision and efficiency are improved, and the realization of defect identification, positioning and tracking marking is ensured.

This invention discloses a high-fluidity, low-casting-defect, and high-strength-toughness Al-Zn alloy and its preparation method, relating to the field of high-performance aluminum alloy materials in aerospace and transportation. The high-fluidity, low-casting-defect, and high-strength-toughness Al-Zn alloy, by mass percentage, comprises the following components: Zn: 5.3-7.3%, Mg: 2.4-3.3%, Cu: 1.4-2.0%, Ni: 0.3-1.3%, Ti: 0.05-0.5%, Zr: 0.03-0.3%, Mn: 0.01-0.2%, Si: ≤0.07%, with Ti and Zr added at a mass ratio of 1-1.5:1. The content of any single impurity is ≤0.03%, and the total impurity content is ≤0.1%, with the balance being aluminum and non-removable impurities. By controlling the content of the main alloying elements and microalloying, the fluidity of the alloy can be improved and casting defects reduced. High-strength and high-toughness alloys can be obtained through heat treatment. The invented alloy has an average spiral flow channel length of ≥700mm, tensile strength of ≥710MPa, yield strength of ≥630MPa, and elongation of ≥8%.

The invention discloses a CMT electric arc welding method for defect repair welding of a ZL114A aluminum alloy casting, and belongs to the technical field of defect repair of aluminum alloy castings. The method aims at solving the problems that an existing repair welding method for the ZL114A cast aluminum alloy is high in heat input, large in deformation and low in repair efficiency. The method comprises the following steps: firstly, aiming at defects of different sizes, machining the defects into regular spherical-crown-shaped grooves of different sizes by utilizing a cold machining method; an electric steel wire brush is used for polishing the inner wall of the groove and base metal around the groove, and surface stains and oxide skin are removed; the casting is placed on a welding workbench; robot CMT welding equipment is adopted for repair welding; and writing a welding gun repairing path on the robot demonstrator. And repair welding is carried out according to the following principles: repair welding is carried out by utilizing an Al-Si welding characteristic curve, a repair welding piece is preheated to 250-350 DEG C, shielding gas is started, and automatic repair is started according to the planned path, the wire feeding speed and the welding speed. By means of the method, high-quality repair welding seams without pores and cracks can be obtained.

The present application relates to the technical field of high-strength aluminum alloy precision casting, and particularly relates to a ZL205A thin-wall component 3DP sand mold casting process, S1, a digital design casting model and a pouring system simulation are adopted to export a printing slice; S2, a mixture of silica sand and zircon sand is adopted, phenolic resin is used as a binder, and an environmentally-friendly sulfonic acid curing agent is used as a curing system to complete sand mold printing; S3, the sand mold is precisely processed to obtain a to-be-assembled mold; S4, ZL205A alloy is melted and refined, an Al-Ti-B-RE composite refiner is added after refining, the adding amount is 0.4wt%, the refined product is preserved for 15 minutes, and the casting mold is preheated at different temperatures at different thickness positions; S5, local gap pouring and bottom pouring are adopted for pouring; S5, post-processing and qualification detection are performed on the casting, the present application adopts the core advantages of a composite pouring process and a regional gradient preheating process, and completely solves the casting defect pain point of variable-wall-thickness components.

This invention discloses a method and apparatus for preparing metal ingots based on melt flow-limited stacking casting and rapid cooling forming, relating to the field of metal forming technology. This method is based on continuous or intermittent advancement of melt flow-limited bottom casting, layer-by-layer reciprocating stacking, and layer-by-layer relay rapid cooling forming. It can achieve continuous rapid cooling forming of the molten metal, refining grains, and by limiting atomic diffusion, achieve layer-by-layer freezing-type rapid solidification forming with uniform atomic distribution in the molten metal, reducing component segregation. It can also simultaneously achieve the relay upward movement or reduction of casting defects such as shrinkage cavities and porosity layer by layer. The flow-limiting guide nozzle is equipped with a liquid outlet and a parallel and similarly shaped anti-oxidation coolant spray nozzle, located at the bottom of a crucible with a filter to reduce inclusions. This invention can simultaneously and rapidly reduce and coordinately control defects such as coarse grains, shrinkage cavities, porosity, component segregation, and inclusions during the solidification of the molten metal in a short process, achieving short-process, high-quality manufacturing of metal ingots, especially large metal ingots (including amorphous ingots).

The invention relates to the technical field of vane pumps, and provides a shield motor nuclear main pump hydraulic model and a shield motor nuclear main pump. The shielding motor nuclear main pump hydraulic model comprises an impeller, wherein blades of the impeller are blades of a line element three-dimensional structure; the guide vane is matched with the impeller, and blades of the guide vane are blades of a linear element three-dimensional structure; the pump shell is matched with the guide vane; the appearance of the line element three-dimensional structure blade is determined through two sets of curve elements located on the front cover plate and the rear cover plate, and the curve elements comprise a front edge line, a tail edge line, a pressure surface line and a suction surface line. According to the line element three-dimensional structure blade, a front edge line, a tail edge line, a pressure surface line and a suction surface line of a front cover plate and a rear cover plate are generated on the basis of parameterized meridian curve, mean camber line angle distribution and thickness distribution, and a continuous curved surface is constructed through a lofting method, a sweeping method or a grid method. The linear element three-dimensional structure blade can be integrally milled, so that the material utilization rate, the machining efficiency and the machining quality are improved, and the casting defects are overcome.

The invention discloses alloy casting defect detection equipment with an intelligent marking function, and relates to the technical field of detection equipment, the defect detection equipment comprises a defect sensing system, a marking mechanism, a positioning mechanism, a clamping mechanism and a conveying mechanism, the defect sensing system is fixedly connected with the positioning mechanism, the marking mechanism is fixedly connected with the defect sensing system, and the clamping mechanism is fixedly connected with the defect sensing system. The positioning mechanism is in fastening connection with the conveying mechanism, the clamping mechanism is in fastening connection with the conveying mechanism, and the defect sensing system is used for conducting defect scanning on the surface and the interior of a casting in an ultrasonic or conductivity mode; the marking mechanism is used for performing coating and curing developing marking operation on the defect area; the clamping mechanism clamps or releases the detected casting, and multi-angle detection requirements are met in a matched mode; the detection precision and efficiency are improved, and the realization of defect identification, positioning and traceability marking is ensured.

The utility model relates to the technical field of multi-stage pumps, in particular to a single-flow-channel type inner shell structure applied to a hydrogenation feeding pump and an ammonium carbamate pump in the petrochemical industry. One end of a long transition flow channel suction chamber is connected with a short transition flow channel at the tail of a pump driving end, and the other end of the long transition flow channel suction chamber is connected with one end of a long transition flow channel; the other end of the long transition runner is connected with the first short transition runner at the non-driving end of the pump; and the first short transition runner at the non-driving end of the pump is connected with the delivery chamber to jointly form an inner shell runner. The short transition flow channels are arranged on the single side of the driving end or the non-driving end of the pump in a staggered mode step by step. According to the technical scheme, the problems that the manufacturing difficulty and cost of a grinding tool are increased due to a double-flow-channel structure in the prior art are solved; the small runner size is easy to generate casting defects, and the yield is low; and the pump efficiency is low.

This invention relates to the field of casting technology, and more particularly to an efficient casting process based on a high-strength cast pouring cup outer frame. The casting process includes acquiring process state parameters at detection points, obtaining outer frame thermal field parameters and interface pressure field parameters, fusing them to generate a comprehensive pouring feature vector, inputting it into a process state recognition model, determining the current process state category and outputting the category confidence score, thereby obtaining a process category selection set and an accurate recognition rate to determine whether the recognition result meets the standard; selecting the corresponding process state category from the selection set and determining the corresponding compensation degree, thereby performing compensation control operations; finally, determining the control efficiency index based on the re-acquired process state parameters after the compensation control operation, and determining whether to adjust the preset compensation degree until the control effect meets the standard. This invention solves the problem of isolated process parameters and inability to adaptively adjust in existing technologies, effectively improving the demolding success rate and reducing the casting defect rate.

The invention discloses a process for producing high-performance cast balls on a V-method production line, which comprises an electric heating box, an air exhaust sand box, a vacuum air exhaust pipeline, a cast ball model, a jolt rammer, a negative pressure box, a sand storage tank and a hydraulic system, the hydraulic system is associated with the electric heating box, and the vacuum air exhaust pipeline is communicated with the air exhaust sand box. The vacuum-pumping V-method production line technology is adopted, the air exhaust sand box is matched with the ball casting model and the model plate to generate negative pressure, molten iron mold filling is smoother, internal casting defects are reduced, meanwhile, only a vacuum pump and a sand storage tank need to be additionally arranged on the V-method production line, equipment is simple and convenient to maintain, and production efficiency is improved. The rectangular plate B on the air exhaust sand box and the rectangular plate A on the model plate are in butt joint and are matched with the sealing embedded blocks to be inserted into the rectangular embedded grooves for positioning, dismounting, replacing and overhauling are convenient, efficient vibration reduction is provided for the vibration compactor through cooperation of the hydraulic buffer rods and the buffer springs and the rubber air bag buffers, and the vibration reduction performance and the vibration compaction effect are improved.

This invention discloses an integrated adaptive filling and venting device for high-pressure casting of aluminum alloys, comprising a mounting plate integrally formed from high-strength cast iron, serving as the mounting and bearing foundation for the entire device. A support base is bolted to the top, the support base being a hollow frame structure with an open top, used to support and provide stable support for the fixed mold base. The fixed mold base is located on top of the support base, and the fixed mold base is sealed and fixedly connected to the support base. A mold groove is provided on the top of the fixed mold base. This device achieves integrated and automated filling, venting, and demolding. Adaptive reciprocating filling and venting thoroughly removes impurities from the mold cavity, avoiding casting defects; gas-free demolding protects casting precision; precise pressure control adapts to multiple casting specifications; compact structure, reliable operation, improves production efficiency and casting qualification rate, reduces labor and maintenance costs, and meets the needs of high-end aluminum alloy precision casting.

The utility model discloses a kind of aluminium liquid holding furnace, it is related to boiler technical field, including furnace body, the top end of the furnace body is movably connected with furnace cover, the top end of the furnace cover is installed with receiving seat, the furnace body outer wall is communicated with flow port, the top surface of the receiving seat is communicated with three-way pipe, one end of the three-way pipe is communicated with straight-through pipe, the other end of the three-way pipe is communicated with elbow pipe, the utility model is stored when aluminium liquid, by closing flow port outer wall ceramic valve, opening ball valve makes straight-through pipe intercommunication furnace body and outside, again, the gas of greater density than air is introduced, using the principle of gas expelling excess air, let aluminium liquid liquid level surface layer fill with protective gas, realize the effective anti-oxidation protection of aluminium liquid, not only make aluminium liquid more resistant to storage, but also can improve the quality of the castings prepared subsequently using the aluminium liquid, reduce the casting defects caused by oxidation problem, improve the overall performance and quality of castings.

This invention relates to the field of crucible casting technology, specifically disclosing a crucible installation method for reducing casting inclusions, comprising the following steps: S1, laying and compacting sand at the bottom of the coil; S2, placing the crucible, ensuring the top of the crucible is higher than the top of the coil, and burying sand around the crucible and in the gap between the crucible and the coil; S3, stopping the sand burying at a distance of 2-4 cm from the top of the coil; S4, plugging the remaining 2-4 cm gap with insulating cotton; S5, after the insulating cotton is compacted, tightly attaching a high-temperature resistant plate to the outer wall of the crucible and placing it on top of the coil and insulating cotton, then fixing it with fasteners. This invention reduces defects caused by crucible installation by improving the sealing method, thereby reducing the proportion of casting defects. The crucible is buried in the coil, the gap is filled with sand, and the final sealing is changed to first plugging with insulating cotton, then using a high-temperature resistant plate to form a shape that tightly fits the crucible to the outer wall and is installed on the coil, minimizing the risk of sand falling from the coil.

The application provides a cast defect detection and identification method, device, equipment and storage medium, and belongs to the technical field of image data processing. The method comprises the following steps: obtaining a cast image and cast information of a target cast, and matching the target cast and a plurality of historical casts according to the cast information to determine a plurality of reference casts from the plurality of historical casts; dividing each reference cast into a plurality of detection regions, wherein the number of detection regions of each reference cast is the same and the positions correspond; determining a plurality of to-be-detected regions of the target cast and a detection sequence of the plurality of to-be-detected regions according to the defect frequency of each detection region of each reference cast; sequentially extracting image feature parameters of the plurality of to-be-detected regions from the cast image of the target cast according to the detection sequence of the plurality of to-be-detected regions of the target cast; and determining defect information of the target cast according to the image feature parameters of the plurality of to-be-detected regions. The application can effectively improve the cast defect detection efficiency.

The present application relates to the technical field of casting defect detection, and particularly relates to a die casting defect detection method, system and device for aluminum alloy die castings. According to the change degree of thickness data of pixel points in a suspected defect area in an X-ray image, the stable degree of gray scale change and the regular degree of edges, a registration compliance degree is obtained, and a non-registration artifact area in the suspected defect area is selected. According to the non-uniformity degree of gray scale and the irregularity degree of shape of the non-registration artifact area, a defect gray scale shape compliance degree is obtained. According to the thickness data of pixel points in the non-registration artifact area and the change degree thereof, an overlapping thickness compliance degree is obtained. According to the defect gray scale shape compliance degree and the overlapping thickness compliance degree, a final defect area in the non-registration artifact area is selected. The present application comprehensively considers morphological characteristics and thickness characteristics, removes interference caused by projection superposition of three-dimensional structures and registration error of CAD models, and improves the accuracy of die casting defect recognition.