6117 results about "Casting" patented technology

The invention relates to the technical field of material fatigue performance testing, in particular to a fatigue acceleration detection method and system for a high-fatigue-resistance cast wheel, and the method comprises the steps: generating a dynamic load spectrum containing a multi-axis combined load according to the actual operation condition of a target cast wheel; applying a dynamic load spectrum to the target casting wheel to perform an acceleration test, and monitoring dynamic strain responses on the surface and inside of the target casting wheel in real time based on the distributed sensing array; establishing a damage accumulation calculation model by taking a loading parameter of the dynamic load spectrum as an additional correlation condition, and calculating an equivalent fatigue damage accumulation value based on the dynamic strain response; when the equivalent fatigue damage accumulated value reaches a preset damage threshold value, it is judged that the target cast wheel reaches the fatigue life end point, and the damage evolution rule in the acceleration test is kept consistent with the damage mechanism of the actual operation working condition. According to the invention, the problems of multi-axis load simulation distortion, incomplete damage monitoring, low service life prediction precision and the like in traditional fatigue detection are effectively solved.

The invention discloses a casting surface treatment defect detection and quality evaluation method and system, and relates to the technical field of casting quality evaluation, and the method comprises the steps: collecting the surface data of a to-be-detected casting, and carrying out the data preprocessing, and obtaining a standardized input data set and a standardized data subset; calling a corresponding analysis sub-model for each subset, outputting quality features and confidence coefficients, and summarizing the quality features and the confidence coefficients into a sub-source result; environment state information is acquired to determine sub-model weights, and weighted fusion is carried out on sub-source results to obtain an evaluation result and an overall confidence coefficient; calculating space / feature / time consistency and judging according to a combination rule; when a re-checking condition is met, obtaining a re-checking label backflow updating data set, and training an updating model and parameters; and dynamically adjusting the threshold value and the weight value according to the performance index for subsequent evaluation. According to the method, multi-source data and environment information can be fused, weight self-adaption and closed-loop updating are parallel, accuracy and stability are improved, misjudgment and missed judgment are reduced, and complex working condition adaptability and long-term reliability are enhanced.

The invention relates to the field of numerical control machining, discloses a numerical control machining method and system integrating thermal expansion dynamic compensation, and aims to solve the problem that precision is out of control due to thermal deformation in high-speed cutting of motorcycle light alloy castings. The method comprises the steps that distributed temperature and displacement sensors are arranged in a key area of a workpiece, and a temperature field and thermal expansion amount are collected in real time; constructing a local thermal deformation prediction model based on a material expansion coefficient and a geometric structure, and correcting a tool path in real time through a coordinate system dynamic offset algorithm; and an on-line measurement feedback mechanism is introduced, and model parameters are adaptively optimized, so that closed-loop compensation is realized. The system comprises a sensing module, a thermal deformation modeling and compensation calculation module, a coordinate dynamic correction module, an online measurement feedback module and a parameter adaptive updating module. Through millisecond-level dynamic compensation and closed-loop self-optimization, the size precision and form and position stability of the complex thin-wall part under the high-temperature working condition are remarkably improved, the rejection rate and cooling energy consumption are reduced, and the method is suitable for a high-precision batch machining scene.

The invention relates to the technical field of production monitoring, in particular to an aluminum alloy casting integrated frame forming process monitoring system and method based on multi-source fusion, and the method comprises the following steps: collecting melt mold filling vibration data, mold interface temperature gradient distribution and pressure waveform data, and constructing a time-space associated multi-physical field original data set; respectively extracting a characteristic frequency band energy value, a temperature change rate extreme value and a pressure pulsation amplitude value in a mold filling stage, and generating a three-dimensional characteristic vector group; adaptive fusion decision making: inputting the three-dimensional feature vector group into a pre-trained space-time convolutional network, and outputting a fusion decision index representing the microdefect formation tendency; carrying out feedforward-feedback composite regulation and control; and online self-correction is carried out. According to the method, the temperature, the pressure and the mold filling speed in the casting process are optimized, defects in the casting are reduced, and particularly in the aspect of temperature control, it is ensured that the temperature in the casting process is kept within an ideal range, so that the casting quality and the production efficiency are improved.

The invention discloses a continuous rigid frame bridge construction monitoring method which comprises the following steps: before cantilever casting construction, arranging linear monitoring points along the longitudinal axis direction of a bridge according to the spacing of 8-12 meters, and respectively arranging stress monitoring points on a top plate and a bottom plate of the root section of each section; synchronously acquiring three-dimensional coordinate data of the linear monitoring points and real-time strain data of the stress monitoring points in the process of pouring each section in a cantilever manner; the collected linear data and stress data are input into a finite element model for collaborative analysis, and when a linear deviation value exceeds + / -5% of a designed pre-camber value and the deviation between a stress measured value and a theoretical calculation value exceeds + / -8%, an adjustment instruction is automatically generated; according to the adjusting instruction, the elevation of the front fulcrum of the hanging basket is adjusted through the hydraulic jack during construction of the next section; after initial setting of the adjusted segment concrete, linear data and stress data are collected, and the actually measured data and a finite element model prediction value are compared and verified. The method can help to guarantee the safety and durability of the continuous rigid frame bridge.

The invention relates to the technical field of bridge engineering construction, in particular to a bridge deck concrete flatness detection and correction method, which comprises the following steps: synchronously acquiring bridge deck point cloud, elevation and crack data through a three-dimensional laser scanner, a laser profiler and an ultrasonic sensor, and fusing to generate a three-dimensional digital model; defects such as local protrusions and wave deformation are recognized based on an intelligent analysis algorithm, causes are analyzed, and correction process parameters such as milling, cladding, grouting or ultrathin layer pouring are generated in a targeted mode; operation is executed through equipment such as a finish milling machine, closed-loop control is realized by combining real-time monitoring of a laser profiler, and finally, a traceable digital file is formed through laser detection, inspection and acceptance of an unmanned aerial vehicle and data archiving. By means of the method, the pass percent of the flatness of the bridge floor can be increased to 94% or above, the maximum height difference is controlled within 3 mm, the maintenance period of the bridge is prolonged, and the maintenance cost is reduced.

The invention discloses a metal casting machining pouring device capable of preventing air hole generation, and relates to the technical field of metal casting machining, the metal casting machining pouring device comprises a base, two sets of stand columns are symmetrically installed at the top of the base, a fixing plate is fixedly installed at the tops of the two sets of stand columns, and the metal casting machining pouring device further comprises a pouring assembly arranged above the base, the rotating base is arranged on one side in the rotating base, the rotating base is hinged to one side of the top of the base, threaded rods are symmetrically connected to the upper portions of the two sides in the rotating base in a threaded mode, and one end of each threaded rod is rotationally connected with a positioning plate; according to the mold for casting the metal casting, in the casting process of the metal casting, the mold can be kept inclined in the casting process and can gradually rotate to be perpendicular to the horizontal plane in the casting process, the inclination angle of the mold is adjusted according to the type of the metal casting, the situation that the machining quality of the casting is affected after casting is completed is avoided, and practicability is improved.

The invention relates to the technical field of automobile die casting air tightness detection, in particular to a new energy automobile die casting air tightness automatic detection device which comprises a detection mechanism arranged on a detection table, and a conveying mechanism and a coating mechanism are arranged on the front portion and the rear portion of the detection mechanism; through cooperation of the detection mechanism, the conveying mechanism and the coating mechanism, automatic discharging of fan motor shells detected to be qualified through a pressure drop method can be achieved, or leakage point detection and positioning of unqualified shells can be directly conducted, and therefore the redundant links of repeated disassembly, transfer and secondary clamping of the shells in traditional step-by-step operation are eliminated; through the cooperation of the detection mechanism, the conveying mechanism and the coating mechanism, a water immersion method detection device and an oil coating method detection device can be integrated in the same equipment, so that a corresponding detection mode is automatically matched according to the leakage data of the unqualified fan motor shell.

The invention relates to the technical field of intelligent detection, and discloses a high-temperature alloy casting size on-line detection system based on machine vision, and the system comprises an imaging fusion module which collects image data of a high-temperature alloy casting, carries out the pixel-level registration of infrared image data and visible light image data, and generates a multispectral fusion image. The feature extraction module performs temperature distribution analysis and brightness feature extraction based on the multispectral fusion image, generates an edge confidence map and extracts a feature point set. And the calculation module performs weighted fitting on the feature points according to the feature point set to obtain thermal state size parameters. And the thermal compensation module performs thermal compensation and geometric correction on the thermal-state size parameters to obtain cold-state size parameters. And the judgment module carries out comparison to judge whether the casting is a qualified casting. According to the invention, stable imaging and accurate registration in high-temperature radiation and strong reflection environments are realized, and the detection efficiency and the size control level of the high-temperature alloy casting are improved.

Fluid runoff systems, methods, and apparatus for processing fluid runoff are provided. In one implementation, a base plate for receiving an inlet casting at a drain basin may be provided. The base plate may include a flat surface with an aperture and an outside edge surrounding the flat surface; a raised lip may surround the outside edge and a flange may extend in a horizontal direction away from the raised lip. The flange may define a flat surface for an inlet casting. The base plate may further include one or more sets of tabs located on the underside of the plate. In another implementation, a fluid runoff system may comprise an inlet casting, a base plate, a drain basin, and a pipe. The base plate may include one or more sets of tabs for connecting with the drain basin.

The invention discloses a hoisting device and method for casting production. The hoisting device comprises a hoisting plate, two clamping pincers and an automatic telescopic piece, and two sets of inserting claws are arranged at the bottoms of the two clamping pincers in a staggered mode; two pulleys are connected below the lifting plate in a left-right sliding mode, the top ends of the clamping pincers are each fixedly connected with a set of lifting ropes, and the two sets of lifting ropes are crossed, then bypass the pulleys in the opposite side directions and are connected with the inserting claws; a rectangular ring is arranged at the crossed position of the lifting ropes, the upper end of the rectangular ring is connected with an automatic telescopic piece, a rhombic four-bar linkage is hinged to the lower end of the rectangular ring, and the left and right sides of the rhombic four-bar linkage are hinged to power arms of the clamping pincers; through the arrangement of the automatic telescopic piece, the lifting plate, the clamping pincers, the pulley, the inserting claw, the rectangular ring and the lifting rope, the automatic telescopic piece stretches out and draws back up and down, the two clamping pincers can be driven to be opened or closed through the rhombic four-bar linkage, and therefore a casting is automatically clamped or released, and time and labor are saved; in addition, through coordination and cooperation of a lifting rope, a rhombic four-bar linkage and an inserting claw, the clamping effect on the casting is improved.

The invention relates to the technical field of casting equipment, and discloses energy-saving furnace roller automatic cooling mold opening casting equipment which comprises an upper mold, a lower mold, an upper locking assembly, a lower locking assembly and a jacking assembly. After casting is completed, cooling liquid is continuously input into the water inlet, the outlet of the lower die cooling cavity is blocked by the sealing column, the cooling liquid is gradually accumulated in the closed lower die cooling cavity, the liquid pressure is gradually increased in a stable and controllable trend, and along with continuous increase of the pressure, the sealing plate is subjected to thrust from bottom to top, so that the sealing effect is improved. When the sealing column moves to the limiting plate, the sealing column is pushed to move upwards, in the process, the liquid pressure is not instantly exploded but is gradually increased, damage of impact force to the mold is effectively avoided, after the sealing column moves to the limiting plate, the rising pressure can push the upper mold to stably rise, and automatic mold opening is achieved. According to the mode that the liquid pressure gradually rises to complete mold opening, an additional power device is not needed, the maintenance difficulty is lowered, and meanwhile a large amount of energy consumption is saved.

The invention discloses a high-precision aluminum alloy casting device and method, and relates to the technical field of casting. The high-precision aluminum alloy casting device comprises a rack, and a conveying chain is arranged on the rack; the mold blocks are uniformly arranged on the conveying chain; the die block is in transmission connection with the flow dividing barrel and the linkage assembly through the transmission assembly; according to the aluminum slag removal device, the slag scraping assembly in the moving assembly continuously removes aluminum slag floating on the surface of molten aluminum in the mold block in a reciprocating mode through the transmission assembly; the guide strip in the linkage assembly enables the slag scraping plate to sink into the inner cavity of the mold block and clear away aluminum slag floating on the surface of molten aluminum, the guide strip is matched with the scraping strip to clear away the aluminum slag adhering to the slag scraping plate, the phenomenon that the aluminum slag is synchronously taken away along with the slag scraping plate or taken into the mold block again is reduced, and the efficiency of clearing away the aluminum slag in the molten aluminum is improved.

The utility model discloses a heat-preservation and energy-saving building column foundation heat-preservation joint which comprises an embedded part, a steel column and a high-strength heat-preservation cushion block. The embedded part comprises a positioning plate and a column foot anchor bolt and is embedded in the positioning plate when a reinforced concrete structural plate is poured, a higher part of the column foot anchor bolt is exposed according to the elevation of a steel column foot bottom plate, a high-strength heat preservation cushion block is arranged on the upper portion of the positioning plate, a hole is reserved in the position, corresponding to the column foot anchor bolt, of the high-strength heat preservation cushion block, and the column foot anchor bolt penetrates through the hole. A steel column base bottom plate penetrates through a column base anchor bolt to fall on the high-strength heat preservation cushion block and is firmly connected with the column base anchor bolt through a nut, a steel cover plate is arranged on the periphery of the steel column, the steel cover plate and the ground surface layer are located on the same horizontal plane, and the space between the steel cover plate and the steel column base bottom plate is filled with foaming polyurethane. On the premise that the structure bearing requirement is met, cold (heat) breaking is conducted on the column foundation part, a heat preservation surface layer does not need to be additionally adopted to wrap a building inner structure column (steel column), the size of the built building inner structure column is appropriate, and building space does not need to be additionally occupied.

The invention discloses a method for reducing pores by repair welding of internal defects of a thin-wall aluminum alloy casting. The method comprises the following steps: confirming and marking X-ray positions of the internal defects of the aluminum alloy casting; internal defects at the marked position are cleaned, the defects are required to be completely eliminated, and the cleaning position is smooth and has a certain groove angle; cleaning oil stains and oxidation films at the repair welding position of the casting; preheating the whole casting; welding a reverse support and adding a blowing protection tool; manual argon arc welding filling surfacing is carried out, arc surfacing is carried out from the periphery to the center, and excess weld metal is reserved; removing redundant weld joint materials of surfacing bulges of the casting; x-ray detection is conducted on the repaired casting, whether the pore defects generated after surfacing repair can meet related requirements or not is emphatically confirmed, and if pores gathered on the surface layer of a weld joint exist, the pores can be discharged through a hot pressing method. According to the method, through hole internal defect cleaning, reverse supporting, blowing protection increasing and arc drawing surfacing methods are adopted for conducting surfacing repairing on the internal defects of the casting, the quality of aluminum alloy casting products is guaranteed, and the rejection rate and the production cost are reduced.

The invention discloses an intelligent cooling system for rapidly cooling a casting, and relates to the technical field of casting cooling. An intelligent cooling system for rapidly cooling a casting comprises a geometric perception module, a cooling template module, a cooling execution module, a dynamic regulation and control module, a resource circulation module, a cooling template iteration module and a data precipitation module. According to the method, the geometrical characteristics of the casting are accurately sensed, heat conduction and heat dissipation function modeling are combined, an initial cooling template is established, and the pertinence and scientificity of a cooling strategy are improved; three cooling units of air cooling, spray cooling and liquid cooling are arranged, differentiated regulation and control are carried out based on a heat dissipation distribution diagram of a space partition, and accurate cooling control over multiple areas of a complex casting is achieved.

The invention belongs to the technical field of metallurgical engineering, and relates to an intelligent guide grinding system and method for the surface of a casting blank. By arranging the parameter initialization module, the parameter compensation module and the deviation correction module, the problem of unstable grinding quality caused by grinding force fluctuation, temperature change and material difference in the casting blank surface grinding process is solved. The method specifically comprises the steps that the feeding speed is dynamically adjusted by collecting grinding force data in real time, thermal deformation compensation is conducted according to the casting blank temperature and the steel grade characteristics, the upper limit value is determined based on quantitative analysis of surface state parameters and historical standard samples, and adaptive adjustment of the next round of coping parameters is achieved. According to the method, the consistency of the grinding depth is effectively improved, the over-grinding risk in the high-temperature casting blank grinding process is prevented, closed-loop optimization and continuous improvement of the grinding process are achieved, the stability and reliability of the casting blank surface grinding quality are improved, and it is ensured that the product quality cannot be affected by surface defects in the subsequent rolling process of the casting blank.

The invention discloses a casting surface defect automatic detection method, which comprises the following steps of: synchronously acquiring multi-moment surface images and morphology data of a casting through multiple channels, automatically partitioning and extracting texture attributes, and realizing accurate space-time indexing; a denoising and brightness normalization algorithm is adopted to improve the consistency of basic data; in combination with a deep learning segmentation model and feature analysis, time sequence space defect matching, affine mapping, pseudo label generation and self-supervision consistency training are completed step by step, and fine-grained optimization is performed on dynamic change of a segmentation boundary. Therefore, the accuracy of defect detection is improved, and high-quality data support is provided for production process improvement and defect traceability.

The application discloses an EVA adhesive film speed-increasing casting machine, which comprises a rack, and the rotating axis center lines of a cooling steel roller one and a cooling steel roller two on the rack are located on a horizontal plane, the rotating axis center lines of a cooling steel roller three and a cooling rubber roller are located on an inclined plane, the inclination angle of the inclined plane is 40-50 degrees, the steel roller inner cylinder and the steel roller outer cylinder of the cooling steel roller one, the cooling steel roller two and the cooling steel roller three are spaced and sleeved to form a steel roller cooling water cavity, the steel roller inner cylinder spiral blade and the steel roller outer cylinder spiral blade are alternately arranged in the steel roller cooling water cavity, the rubber roller inner cylinder and the rubber roller outer cylinder of the cooling rubber roller are spaced and sleeved to form a rubber roller cooling water cavity, the rubber roller inner cylinder spiral blade and the rubber roller outer cylinder spiral blade are arranged in the rubber roller cooling water cavity, and the rubber roller outer cylinder outer wall is coated with a rubber roller rubber coating layer. The film casting machine can effectively control the thickness uniformity of the extruded film and the definition of the film surface embossing, and effectively improve the operation efficiency of the casting machine.

The invention discloses a die-casting intelligent control method for a deep-tooth efficient heat dissipation sealing die-casting aluminum shell, and relates to the technical field of metal casting. The method comprises the following steps: dividing the surface area of a target workpiece into a deep tooth area and a non-deep tooth area according to a preset standard; carrying out real-time acquisition and data processing on the first pairing data set of the deep tooth area; the technical key points are as follows: the resource utilization rate and the multi-objective collaborative optimization capability are effectively improved by implementing a three-stage dynamic adjustment mechanism, and when problems occur in two regions, the MOEA multi-objective evolutionary algorithm is adopted, and the optimization requirements of each region are balanced through dynamic weight distribution, so that on one hand, the problems are quickly and effectively solved, and on the other hand, the optimization efficiency is improved; on the one hand, through accurate calculation and intelligent decision making, optimal coordination among different targets is achieved, the challenge that various requirements are difficult to consider in traditional die-casting control is overcome, and the efficient and stable production management effect is achieved.

A method for predicting microscopic holes of an aluminum alloy product and impact on macroscopic service properties includes: casting simulation, i.e., obtaining a casting simulation finite element mesh by dividing, and using casting simulation software to simulate a solidification process of a casting under corresponding process conditions to obtain macroshrinkages of the casting and physical information of each node on the mesh; cellular automata simulation, i.e., simulating microstructure growth by using a cellular automata model to obtain a secondary dendrite arm spacing (SDAS) value at each node of the casting simulation finite element mesh, and the morphology and size of microscopic holes including microshrinkages and microscopic blowholes; mechanical property simulation, and mapping and inputting mesh information of the casting simulation finite element mesh into the mechanical and fatigue property simulation finite element mesh to obtain a mechanical property simulation result; and fatigue property simulation.

An integrated energy absorbing system of a vehicle with a front integrated energy absorbing casting and a back integrated energy absorbing casting. Each front and back casting is a single unified casting that makes up the integrated energy absorbing system. Ribbed sections such as “I” sections and “C” sections make up the castings and are formed from a variety of different techniques and / or formings such as cutout, waveform profile, tapering, flaring and / or rib spacing. Additional sections such as closed section castings may also be integrated in the integrated energy absorbing system.

The invention discloses a casting ball production line metal mold preheating device for high-quality copper casting manufacturing, and relates to the field of casting manufacturing, the casting ball production line metal mold preheating device comprises a mold, a heat exchange mechanism, a heat pipe, a cold pipe and a cold and hot switching conveying mechanism; the device has the advantages of being reasonable and simple in structure, low in production cost and convenient to install, efficient circulating preheating of hot liquid is achieved through cooperative operation of the conveying pump, the heat pipe, the cold pipe and other components, the hot liquid fully exchanges heat with the mold in the heat exchange annular groove through the spiral flow guide pieces, and the preheating efficiency is greatly improved; the valve element is driven by the oil cylinder to move to achieve cold and hot passage switching, the function switching from preheating to cooling of the mold can be rapidly completed, the smoothness of the production process is guaranteed, and the production period is shortened; in the cooling process, cold liquid can flow back to the hot liquid cavity after absorbing heat of the mold, cyclic utilization of the cooling liquid is achieved, energy waste is effectively avoided, the production cost is reduced, and the resource utilization rate is increased.

The invention discloses a design method of a riser in a duplex stainless steel impeller casting process based on defect prediction, and relates to the technical field of casting optimization. Comprising the following steps: detecting the gas content and mapping related data by acquiring the duplex stainless steel impeller produced under different material addition amounts and pouring process parameters to generate a training sample data set; and establishing a convolutional neural network model by using the data set, and training a prediction model taking the gas content as a label. And the material adding amount and the pouring parameters of the impeller to be produced are input into the model, and a gas content predicted value is obtained. Impeller geometric parameters and casting characteristic parameters are collected, and a fluidity influence factor, a gas inclusion factor and a shrinkage influence factor are calculated. And correcting the riser characteristic parameters based on the factors to obtain accurate values of the riser diameter, the riser height and the riser surface area so as to finish the riser design. And the rejection rate in the casting process is reduced, material waste is reduced, and the production cost is reduced.

The invention relates to the technical field of double-roller cast rolling, and provides a roller gap control method. According to the method, in the casting and rolling process, controlled floating of a roll gap is achieved under the condition of constant opening degree by controlling the overall movement of a driving device and a roll system and the relative movement between the driving device and the roll system, and therefore the material updating process in a molten pool is stabilized. Different from a traditional technical scheme, the method can keep the two roller bodies and the side sealing device static relative to the ground in the roller gap floating period, the thickness fluctuation of the green body is effectively avoided, the abrasion rate of the side sealing plate is reduced, and therefore the stability of the cast-rolling process and the quality of the green body are improved.

The application discloses a kind of martensitic age steel of additive manufacturing and preparation method thereof, the martensitic age steel, according to mass percentage, its composition is as follows: Ni 16~22%, Co0-5%, Mo 2~6%, Ti 0.2~2.5%, Al 0~1.5%, Re 0~0.3%, wherein Re is selected from at least one of Y or La, the balance is Fe and inevitable impurities.In the application, by reducing Co element, adjusting the ratio of Ni, Ti and Mo in the alloy, while adding a small amount of rare earth (Y and La) element, the alloy has higher M s Under the premise, the raw material cost of alloy powder and the preparation cost of alloy are greatly reduced, and the fine equiaxed grains and high-density nano precipitates formed after aging are formed by combining with the process parameter control of additive manufacturing, so that the mechanical properties of the martensitic age steel are greatly better than those of the traditional casting process.

The invention relates to a reticular biphase heterostructure cast high-entropy alloy as well as preparation and application thereof, and aims to solve the technical problems of high production cost and long period caused by dependence on introduction of high-cost elements or a complex process in the conventional high-entropy alloy. The CrFeNiAlSi series alloy is used as a matrix component, the alloy design is optimized by introducing the Ti element, and the CrFeNiAl0. 28Si0. 12-xTix as-cast high-entropy alloy is prepared by combining the vacuum arc melting and suction casting process. The mechanical property of the alloy is optimized by reasonably adding Ti into the CrFeNiAlSi alloy and regulating and controlling the content of Ti, meanwhile, the adverse effect brought by Ti is overcome or balanced, and the as-cast high-entropy alloy which has a heterogeneous phase structure between battens and has high strength and good plasticity is developed.

The invention discloses a stiff skeleton arch bridge arching process optimization method and system considering multiple objectives, and belongs to the technical field of bridge construction.The method includes the steps that a stiff skeleton arch bridge main arch ring finite element model is established, design variables and optimization objectives are analyzed and determined, and a multi-objective optimization model is established; minimization of instantaneous stress and permanent stress of a main arch ring of the stiff skeleton arch bridge and minimization of vertical deformation of a vault are used as objective functions, the length of a working face is used as a design variable, and constraint conditions are set. After an initial pouring scheme is determined based on an actual construction scheme, an optimization scheme is solved by adopting an NSGA-II algorithm. And further constructing quantitative evaluation indexes including a comprehensive stability coefficient and a stability coefficient variance, constructing a comprehensive evaluation index based on the quantitative evaluation indexes, and finally determining an optimal pouring scheme. The arch forming quality and the structural safety of the arch bridge can be effectively improved, the construction scheme is optimized, the construction cost is reduced, and important engineering application value is achieved.

The utility model discloses a metal casting part surface polishing device which comprises a mounting frame and two transverse plates, the mounting frame is rotationally connected with a rotating plate through two rotating shafts, the upper end of the rotating plate is provided with a polishing box through a plurality of damping assemblies, and a separating mechanism used for separating casting parts from grinding stones is arranged in the polishing box. The separating mechanism comprises a filter screen arranged on the polishing box, a fixing frame is fixedly connected to the side wall of the polishing box, electric push rods are arranged on the two side walls of the fixing frame, and the output ends of the two electric push rods are jointly provided with two baffles. According to the casting part polishing device, the separating mechanism is arranged, grinding stone balls can be separated from casting parts through the filter screen, feeding and discharging of the casting parts can be conducted on the two sides of the polishing box at the same time, and therefore the feeding and discharging time of the casting parts is greatly shortened, and the practicability of the device is improved.

The invention belongs to the technical field of image data processing, and particularly relates to an automatic evaluation method and system for the metallographic spheroidization rate of a casting, and the method comprises the steps: constructing a global gradient field of a metallographic image of the casting; calculating a centripetal index by using a negative gradient vector and positioning a graphite particle physical center; determining a physical boundary based on the ratio of the tangential slip amount to the radial projection intensity on the ray path; obtaining a compactness index based on the consistency of the internal negative gradient vector and the radial direction; and the spheroidization score is calculated by combining the contour roundness and the compactness index, and the spheroidization rate is counted and output. According to the method, the problem that the internal crushing defect cannot be identified by the existing geometric scalar method is solved, and dual evaluation on the morphology and compactness of the graphite particles is realized.