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.
G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
G06F 119/02 - Reliability analysis or reliability optimisationFailure analysis, e.g. worst case scenario performance, failure mode and effects analysis [FMEA]
2.
METHOD AND APPARATUS FOR SIMULATING THERMAL STRESS OF CASTING MOLD DURING SERVICE PROCESS, AND STORAGE MEDIUM
The present invention discloses a method and apparatus for simulating thermal stress of a casting mold during a service process, and a storage medium. The method comprises: importing a pre-built three-dimensional geometric model of the casting mold, processing the geometric model, and then performing grid division to obtain a casting simulation finite element physical model; assigning material parameters, interface parameters, process parameters, and boundary conditions to the finite element physical model to obtain a casting simulation finite element calculation model; performing casting process simulation calculations to obtain casting simulation results such as mold temperature field and stress field, and exporting result data; interpolating a temperature-stress correction factor; multiplying all correction factor data under the same node numbers with mold stress data to obtain final thermal stress distribution data of the mold during the service process.
The present disclosure relates to the technical field of die casting machine devices, in particular to a digital die casting machine with mold temperature control, including: a die casting machine configured to die-cast a casting through a mold, a cooling flow control apparatus configured to control a mold temperature by controlling a cooling medium flow, a temperature collection apparatus configured to collect the mold temperature, a control cabinet configured to acquire and store data collected by the temperature collection apparatus and control operation of the die casting machine, the cooling flow control apparatus and an automatic control apparatus, an edge computer configured to execute a die casting temperature optimization strategy according to the collected data stored in the control cabinet, and the automatic control apparatus. The present disclosure improves the molding quality of castings by adjusting the mold temperature in a casting process.
The present invention relates to a high-strength and high-toughness die-casting aluminum alloy, and a preparation method therefor and the use thereof. The alloy comprises 7.0-9.5% of Si, 0.4-0.9% of Mn, 0.15-0.35% of Mg, 0.1-0.4% of Nb, 0.1-0.4% of V, 0.10-0.25% of Ti, 0.03-0.05% of Sr, no more than 0.30% of Fe, and no more than 0.05% of inevitable impurity elements, with the balance being Al. The alloy shows relatively high fluidity and good thermal cracking resistance and mold sticking resistance, has high strength and elongation in an as-cast state, has higher mechanical properties and an elongation of no less than 10% after undergoing a heat treatment, and meets the performance requirements of die-cast structural parts for automobiles. Switching to the alloy can be rapidly achieved on an existing die-casting production line, without the need for reforming and upgrading of existing smelting and die-casting apparatuses, such that the production cost is reduced.
C22C 21/02 - Alloys based on aluminium with silicon as the next major constituent
C22B 9/10 - General processes of refining or remelting of metalsApparatus for electroslag or arc remelting of metals with refining or fluxing agentsUse of materials therefor
REFINER FOR ALUMINUM ALLOY, ALUMINUM-NIOBIUM-TITANIUM-BORON, METHOD FOR PREPARING REFINER, METHOD FOR PREPARING ALUMINUM-NIOBIUM-TITANIUM-BORON, AND METHOD FOR PREPARING ALUMINUM-NIOBIUM-BORON
A refiner for aluminum alloy, aluminum-niobium-titanium-boron, a method for preparing refiner, a method for preparing aluminum-niobium-titanium-boron, and a method for preparing aluminum-niobium-boron. The refiner is AlNb(X)B, X being either of lanthanum and cerium. When X is lanthanum, potassium fluoniobate, aluminum-lanthanum alloy, potassium fluoborate and aluminum are provided and put into a reaction furnace for heating reaction, a fluoroaluminate generated after the reaction is poured out and then casting is performed on a reaction product, thereby obtaining aluminum-niobium-lanthanum-boron; and when X is cerium, potassium fluoniobate, aluminum-cerium alloy, potassium fluoborate and aluminum are provided and put into the reaction furnace for heating reaction, a fluoaluminate generated after the reaction is poured out and then casting is performed on a reaction product, thereby obtaining aluminum-niobium-cerium-boron. In the preparation method, potassium fluoniobate is used as a niobium source, so that low price and high economical efficiency are achieved. For the prepared refiner, the reaction temperature is low and within the range of 700-900°C, so that the burning loss of molten aluminum is small and reaction is adequate, and the reaction time is 10-60 minutes, so that the efficiency is high.
A preparation method for an aluminum-niobium master alloy. The preparation method comprises the following steps: proportioning reactants, i.e., potassium fluoniobate and aluminum, according to an aluminum-niobium master alloy comprising 5.0-30.0 wt% of niobium and the balance of aluminum, placing the two in a reaction furnace, mixing and heating same for a reaction, enabling a fluoroaluminate generated after the reaction to float on the surface of a reaction product in the reaction furnace, pouring out the fluoroaluminate, and then casting the reaction product, so as to obtain the aluminum-niobium master alloy. By means of the preparation method, an aluminum-niobium master alloy with a relatively low niobium content can be prepared.
The invention relates to the field of aluminum wheel casting molds, and more particularly relates to a closed-loop control method and system for a mold temperature in a wheel casting process. The control method includes: step 1, acquiring data, that is, acquiring a plurality of mold position temperatures, and cooling pipeline opening and closing signals in a target wheel casting process according to a fixed frequency; step 2, storing, based on acquired mold opening and closing signals of casting equipment, the acquired data in a database in the form of a unique ID according to a single wheel casting process; step 3, calculating new process parameters based on the acquired plurality of position temperatures and time; and step 4, integrating the calculated process parameters, and issuing the process parameters to a PLC of a casting equipment to perform new casting. According to the invention, the temperature control parameters are calculated based on the acquired temperature data and time process to form the temperature control process of the casting process, which solves the technical problem of significant fluctuations in the quality of the low-pressure casting process of aluminum wheels and improves casting stability and yield.
A purification method of a recovered aluminum melt for an automobile hub includes nitrogen degassing of a gas permeable brick pouring ladle bottom layer arranged on a lower portion of a gas permeable brick pouring ladle and argon degassing of a rotor degasser arranged on an upper portion. The invention has a good degassing and deslagging effect and high purification efficiency, and achieves energy conservation and environmental protection.
3, ZnO, binders and other materials and a coat drying heat treatment process, and finally realizes effects of protecting a riser tube, being free of aluminum sticking and prolonging a service life.
The disclosure discloses a magnesium alloy material smelting device, comprising a furnace, a disc packing device, the disc packing device comprising a stirring shaft, a packing basket, a disc stirring head, the stirring shaft connected with a packing basket, the bottom of the packing basket connected with a disc stirring head, the disc stirring head comprising a plurality of stirring wings, the stirring wings connected with the packing basket and the stirring disc, the connecting ends of the stirring wings connected with each other, the stirring ends extending to the edge of the stirring disc, and the sidewall of the packing basket provided with a liquid passage hole; during the process of preparing and processing the magnesium alloy, the disc stirring head may accelerate the diffusion, the rotation of the disc stirring head may divide the melt into upper and lower layers, and the upper layer of the melt forms a solution vortex to accelerate the diffusion of the master alloy elements; the lower melt keeps relatively static to avoid the upturn of precipitated slag and shorten the precipitation time of slag, thereby improving the productivity.
12, refine the grains, increase the amount of eutectic, and reduce the risk of thermal cracking of large-size cast bars. In addition, Sr weakens the texture during the high-temperature spinning forming process and reduces the risk of cracking during the spinning tension, which is beneficial to high-speed spinning forming.
C22C 23/02 - Alloys based on magnesium with aluminium as the next major constituent
C22C 1/03 - Making non-ferrous alloys by melting using master alloys
C22F 1/06 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
An aluminum alloy material smelting device comprises a furnace and a packing device with a packing basket, a stirring shaft connected with the packing basket and a stirring head connected with the bottom of the packing basket. The stirring head comprises a plurality of stirring blades with one end connected with the bottom of the packing basket and another end connected with each other on the central axis of the packing basket. The side wall of the packing basket is provided with a liquid passage hole to exchange liquid with the solution outside the packing basket. By rotating the stirring head, a solution vortex accelerating the diffusion of added elements can be formed only under the stirring head, which will not damage the covering film formed on the surface of aluminum alloy. Thus the scum on the surface is effectively prevented from being involved in the solution again.
The disclosure discloses a spinning process of a magnesium alloy wheel hub, which comprises the following steps: step 1, heating a magnesium alloy bar at 350-430° C. and keeping the temperature for 20 minutes; step 2, initially forging and forming on the bar under a forging press, wherein the forging down-pressing speed is 6-15 mm/s; step 3, finally forging and forming on the bar under a forging press, wherein the forging down-pressing speed is 5-8 mm/s; step 4, stress relief annealing on the final forged magnesium alloy blank; step 5, solid dissolving on the annealed magnesium alloy blank; step 6, taking out the solid-dissolved blank and directly spinning by a spinning machine; step 7, heating treatment and aging treatment. The magnesium alloy wheel hub with excellent performance is obtained by the process, and the spinning process and processing efficiency are greatly improved.
C22F 1/06 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
B21J 1/06 - Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
70.
Magnesium alloy for wheel and preparation method thereof
The disclosure discloses a magnesium alloy for wheels, comprising in mass percentage: Al: 2-3.0 wt. %; Zn: 0.5-1.0 wt. %; Mn: 0.3-0.5 wt. %; Ce: 0.15-0.3 wt. %; La: 0.05-0.1 wt. %, the balance is Mg. The magnesium alloy of the present invention takes Al element and Mn element as main alloying elements, supplemented by trace Ce and La elements as alloying process, and the nano-scale Mn-rich precipitated phase obtained during homogenization and the segregation of rare earth elements Ce and La at the interface and grain boundary of Mn-rich precipitated phase are used to inhibit the coarsening during extrusion and forging, so as to improve the strength and plastic deformation ability of the alloy.
The disclosure discloses the forging process of a magnesium alloy wheel hub comprises the following steps: step 1, heating a magnesium alloy bar to 350-420° C. and keeping the temperature for 20 minutes; step 2, forging and forming the bar under a 6000-ton forging press, and controlling the forging process in sections. The forging process of the disclosure adopts sectional control, different forging process parameters are adopted in different forging stages, so that magnesium alloy bars can exert maximum forgeability in different deformation stages, make magnesium alloy deformation process more continuous, make forging process easier, obtain forged magnesium alloy wheel hub with excellent properties, and greatly improve forging process and processing efficiency.
A curve fitting method, apparatus and device based on a drawing tool for improving the accuracy of curve fitting. The method includes: determining a fitting area containing the original curve, in the fitting area, performing at least one sub-fitting operation on the original curve until the end condition of the curve fitting is satisfied, and generating a fitting curve corresponding to the original curve based on the fitting curve corresponding to each sub-fitting operation. This method can fit the original curve segments in the fitting area, which improves the accuracy of the obtained fitting curve.
G06F 30/12 - Geometric CAD characterised by design entry means specially adapted for CAD, e.g. graphical user interfaces [GUI] specially adapted for CAD
A hub image retrieval method and a device thereof for improving the retrieval accuracy of an image containing a hub. The method includes: performing feature extraction on a hub image to be processed containing a target hub, and obtaining a hub feature to be processed containing N sub-hub features, wherein the N sub-hub features at least include information characterizing the features of a hub window of the target hub; determining similarities between candidate hub features of each candidate hub image and the hub features to be processed; and selecting a candidate hub image matching the hub image to be processed from the plurality of candidate hub images based on the determined respective similarities.
G06V 10/74 - Image or video pattern matchingProximity measures in feature spaces
G06V 10/46 - Descriptors for shape, contour or point-related descriptors, e.g. scale invariant feature transform [SIFT] or bags of words [BoW]Salient regional features
G06T 7/62 - Analysis of geometric attributes of area, perimeter, diameter or volume
G06F 16/532 - Query formulation, e.g. graphical querying
The disclosure relates to the technical field of hydraulic pneumatic systems, in particular to an electric control valve detection plug and an electric control valve signal detection method. The disclosure can accurately measure the electric control signal actually obtained by the valve, thus avoiding the risk of misjudgment. The disclosure has simple manufacture and convenient installation and disassembly.
F16K 37/00 - Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
F16K 31/06 - Operating meansReleasing devices electricOperating meansReleasing devices magnetic using a magnet
The disclosure discloses a method of producing a magnesium alloy wheel hub, comprises the following steps: step 1, heating a magnesium alloy bar to 350-430° C. and keeping the temperature for 20 minutes; step 2, initially forging and forming the bar under a forging press, the forging speed is 6-15 mm/s; step 3, finally forging and forming the bar under a forging press, and the forging speed is 5-8 mm/s; step 4, testing the microstructure and material properties of the final forged blank to obtain the layered material property distribution on the thickness of the blank; step 5, according to the layered material property distribution on the thickness of the blank obtained in step 4, selecting the part that meets the requirements to make a magnesium alloy wheel hub. According to the different properties in the thickness direction of the blank, the spoke orientation of the magnesium alloy wheel can be quickly designed according to the needs, and the magnesium alloy wheel that meets the usage performance can be obtained, which greatly improves the design and processing efficiency.
The invention provides a surface treatment method for a magnesium alloy hub. The process includes: cleaning a to-be-treated surface of the magnesium alloy hub; blackening the cleaned to-be-treated surface; and laser cladding the blackened to-be-treated surface, wherein a laser cladding mode is a synchronous powder feeding mode, and a coating material is chromium. According to the surface treatment method for the magnesium alloy hub, air holes can be avoided.
A high-precision intelligent centering device, consisting of a symmetrical synchronous centering mechanism. The invention can meet the needs of wheel centering in use with the ideal effect and high efficiency. Work is safe and reliable, degree of automation is high, and it is especially suitable for mass production on the production line.
The application discloses a preparation method for an aluminum alloy cavity casting filled with special-shaped foamed aluminum. The preparation method includes: preparing special-shaped foamed aluminum in a first mold by adopting a powder metallurgy foaming method; fixing the special-shaped foamed aluminum coated with the soldering flux in a second mold after the special-shaped foamed aluminum is coated with soldering flux; and casting by using molten aluminum alloy. According to the preparation method for the aluminum alloy cavity casting filled with the special-shaped foamed aluminum, the overall strength of the casting can be improved while the wall thickness of the casting is reduced to meet the requirement that the overall quality of the casting is not increased.
B22D 21/00 - Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedureSelection of compositions therefor
B22C 9/10 - CoresManufacture or installation of cores
B22D 18/04 - Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
B22D 19/00 - Casting in, on, or around, objects which form part of the product
B22D 25/02 - Special casting characterised by the nature of the product by its peculiarity of shapeSpecial casting characterised by the nature of the product of works of art
A device for printing two-dimensional code identifiers in an intelligent manufacturing system is composed of a clamping and positioning part and a two-dimensional code printing part. The invention can meet the demand for printing two-dimensional code identifiers in an intelligent manufacturing system, and has ideal effects and high efficiency. The operation is safe and reliable, with high degree of automation, and is especially suitable for mass production on the production line.
B41J 2/44 - Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source, e.g. lighting beams or shutter arrangements
B41J 3/407 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
B41J 3/413 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material for metal
B41F 17/00 - Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
