607 results about "Pressure casting" patented technology

The invention provides a low-speed and ultrahigh-pressure die-casting process method for automobile part die-casting, and relates to the field of automobile part manufacturing. The method includes the following steps that firstly, a mold is prepared, secondly, molten metal is prepared, thirdly, a casting is cooled and demolded, and fifthly, follow-up treatment is conducted. The defects that in the high-speed mold filling process of a common high-pressure casting technology, gas is likely to be involved in the molten metal, and consequently air holes, shrinkage porosity and the like are generated in the casting are overcome; and when key parts such as automobile engine cylinder bodies and hubs are produced, air hole defects possibly cause the problems of air leakage of engines, insufficient hub strength and the like. And meanwhile, for parts with thin walls and complex structures, uniform filling of molten metal in a mold is difficult to ensure by a traditional die-casting process, the defects of cold shut, insufficient pouring and the like are easy to occur, and the qualified rate and the production efficiency of products are reduced.

The invention relates to the technical field of aluminum alloy hub low-pressure casting, and particularly discloses an aluminum alloy hub low-pressure casting device and a casting method.The bottom of a base is movably connected with a crucible, the side face of the base is fixedly connected with a discharging component, and the bottom of a lower die component is fixedly connected with the top of the base; the upper die part comprises a connecting shaft, the bottom of the connecting shaft is fixedly connected with the top of the connecting block, and the bottom of the connecting shaft is fixedly connected with the top of the lower die part. According to the low-pressure casting device for the aluminum alloy hub, the lower die component is arranged, when the driving piece is started to enable the upper die plate to drive the male die block to vertically move downwards, the electric hydraulic cylinders on the two sides of the lower die plate are synchronously started, and the output ends of the electric hydraulic cylinders drive the pushing shafts to drive the stopping blocks to horizontally move towards the female die until the two stopping blocks tightly abut against each other; a wrapping protection structure for the periphery of the female die is formed, and molten aluminum is prevented from overflowing in the mold filling process.

The invention discloses an electric engine assembly integral forming process based on precision integral casting, which comprises the following steps: designing a split type precision mold through computer aided design software, and carrying out nitriding treatment to improve the performance; selecting a specific aluminum alloy raw material, performing vacuum induction melting and refining, and injecting the aluminum alloy raw material into a preheated and sprayed mold cavity in a low-pressure casting manner; and demolding after air cooling and water cooling are combined, then after-treatment procedures such as deburring and heat treatment are conducted, and finally detection and assembly are conducted. A conformal cooling water channel design and an ultrasonic-assisted smelting technology are adopted in the process innovation, and the casting process is monitored in real time. According to the process, manufacturing procedures are reduced, compared with a traditional mode, the production efficiency is improved by 30%-50%, the cost is reduced by 20%-30%, the assembling problem is effectively avoided, the sealing performance and reliability of the electric engine are improved, the service life of the electric engine is prolonged, high integration is achieved, and the modern industrial requirement is met.

An intelligent door opening and closing device for a holding furnace of a low-pressure casting machine is characterized by comprising an intelligent recognition mechanism, a heat insulation furnace door mechanism, a spinning mechanism, a door opening mechanism and a control mechanism. The high-temperature-resistant vacuum box which is slightly smaller than the liquid adding opening and provided with the glass surface is adopted to replace an existing ceramic plate, the heat insulation effect of the heat insulation furnace door is improved, and energy consumption is reduced; the six spinning oil cylinders arranged on the furnace shell on the periphery of the liquid adding opening are used for pressing and sealing the heat-insulation furnace door, the pressure needed for pressing and sealing the heat-insulation furnace door is met, screw spinning is replaced, air leakage of a sealing strip is avoided, and the requirement for automation of pressing and sealing the heat-insulation furnace door is met; an electric contact pressure gauge arranged on a heating pipe housing on one side of the low-pressure furnace and an intelligent recognizer with a cooling fan and a cooling fan cover on an intelligent recognizer frame are adopted, and when the electric contact pressure gauge confirms that the heat preservation furnace has no pressure and the intelligent recognizer confirms that the position of a liquid adding bag is correct, liquid is automatically added into the heat preservation furnace; the method is suitable for black lamp production, reduces the casting production cost, and meets the requirements of black lamp production.

The invention relates to the field of impact failure full-process prediction of complex-structure die castings, and discloses a data-driven impact failure full-process prediction method for complex-structure die castings, which comprises the following steps: step 1, performing mold flow simulation on a target part to obtain the solidification time and porosity of any position of the target part; 2, the solidification time and porosity of any position of the target part are input into a multi-layer perceptron model, and the multi-layer perceptron model outputs mechanical parameters of any position of the target part; the multi-layer perceptron model is trained based on data of actually measured mechanical properties; 3, acquiring a collision simulation grid model of the part, mapping the mechanical parameters to each grid unit of the collision simulation grid model, and generating an input file for collision simulation; and 4, performing collision simulation based on the input file in the step 3.

The invention relates to the technical field of engine casting molds, in particular to a cylinder sleeve limiting system of a high-pressure casting aluminum alloy slope type box, which comprises a mold, a core pulling device fixed on the mold and a limiting assembly connected in the mold in a sliding manner, and the core pulling device is used for driving the limiting assembly to axially move in a mold cavity; the limiting assembly comprises a sliding base connected to the mold in a sliding mode, a sliding block fixed to the sliding base and an insert fixed to the sliding block, and two symmetrically-arranged expansion blocks are connected to the insert in the diameter direction in a sliding mode. A cavity is formed in the center of the insert, an expansion pin is slidably connected into the cavity, and the expansion pin controls the end heads of the two expansion blocks to synchronously eject out or retract towards the peripheral face of the insert through axial movement. A channel is formed in the center of the expansion pin, an air inlet is formed in the sliding seat, one end of the channel is communicated with the cavity in the center of the insert, and the other end of the channel is communicated with the air inlet of the sliding seat. According to the scheme, the cylinder sleeve positioning precision of the engine box can be improved, and the casting process quality is guaranteed.

The high-strength low-friction retainer formed through high-pressure casting comprises a retainer body, the retainer body comprises two arc-shaped sections and a plurality of window beams connected with the two arc-shaped sections, window holes for containing rolling bodies are formed between the adjacent window beams, and the sides, away from the window holes, of the window beams located at the two ends of the retainer body are provided with inward concave faces. And the inner concave surfaces of the two adjacent retainer main bodies are oppositely arranged to form an oil accommodating gap, so that the oil storage space in the bearing is obviously increased. According to the retainer, sufficient lubricating oil is guaranteed between the rolling body and the retainer main bodies and between the retainer main bodies, more effective heat dissipation is further facilitated, the design of the inner concave faces reduces the direct contact area between the adjacent retainer main bodies compared with a straight face, and therefore friction and abrasion between the retainer main bodies are reduced, and the service life of the retainer main bodies is prolonged. And the overall performance and stability of the bearing are improved.

The invention provides a magnesium-lithium alloy and a semi-solid thixotropic die-casting preparation method of the magnesium-lithium alloy. The magnesium-lithium alloy comprises the following components in percentage by mass: 5-14% of Li, 2-9% of Al, 1-3% of Zn, 1-5% of Ca, 0.3-3% of RE and the balance of Mg. The semi-solid thixotropic die-casting preparation method of the magnesium-lithium alloy comprises the steps that S1, burdening and drying are conducted according to the preset mass percent, vacuum melting is conducted in the protective gas atmosphere, and molten metal is obtained and cast into a magnesium-lithium alloy cast ingot; performing extrusion deformation on the magnesium-lithium alloy ingot, and cutting to prepare millimeter-scale long rod-shaped magnesium-lithium alloy particles; s2, the magnesium-lithium alloy particles obtained in the S1 are heated to the solidus temperature Ts or above, electromagnetic stirring is conducted, and semi-solid slurry is prepared; and S3, the semi-solid slurry is injected into a die-casting die, a die cavity is filled with the slurry by applying pressure, die opening and part taking are conducted after pressure maintaining, and the ultra-light high-strength semi-solid thixotropic die-casting magnesium-lithium alloy casting is obtained.

The application relates to the technical field of metal casting, and discloses a directional solidification casting equipment for low-internal-stress aluminum alloy complex structures, which comprises a heat preservation furnace, a rotary casting assembly, an infiltration temperature control assembly and a forming die. The casting equipment is provided with the rotary casting assembly and the forming die on a rotary table, the rotary table rotates at different rotating speeds to provide controllable centrifugal force, metal liquid is infiltrated and cast on the forming die in the anti-gravity mode under the action of the centrifugal force, the infiltration speed and pressure can be adjusted by changing the centrifugal force, the limitation of workpiece size in negative pressure casting is broken, and the anti-gravity casting of complex structure workpieces is facilitated, the equipment can simultaneously synchronously cast multiple molds, each process parameter is convenient to uniformly control, the quality consistency is ensured, the problem that continuous carbon fiber reinforced aluminum matrix composite materials are difficult to mass produce is solved, and the production efficiency is improved.

The invention relates to a two-chamber low-pressure casting holding furnace and a low-pressure casting method. The two-chamber low-pressure casting holding furnace comprises a heat preservation chamber, a low-pressure casting chamber, a communicating cavity, a liquid rising pipe, a first air inlet pipe and a liquid opening, wherein the heat preservation chamber comprises a precipitation cavity and a confluence cavity; and the communicating cavity comprises a liquid inlet section, a transition section and a liquid outlet section. Compared with the prior art, the heat preservation chamber of the holding furnace is directly communicated with the low-pressure casting chamber, an intermediate valve is omitted, and the pressure bearing capacity of the holding furnace is greatly improved; and large pressure can be generated by arranging a second air inlet pipe and enabling the second air inlet pipe to be matched with the first air inlet pipe, so that the overall working performance of the holding furnace is improved in a spanning manner, the holding furnace can be used for producing thin structural parts, such as automobile chassis parts, A columns and B columns, with larger projection areas, and the practicability of the holding furnace is greatly improved.

An electromagnetic stirring low-pressure casting pouring system (100) comprises a flask, a sprue (110), a runner (130), a mold cavity (150) and a riser (170) being formed in a core inside the flask, wherein the runner is arranged at a top end of the sprue and is in communication with the sprue, the runner is in communication with the mold cavity, the riser is in communication with the mold cavity, overflow ladles (190) are arranged on two sides of or around the sprue, and top ends of the overflow ladles are in communication with the top of the sprue and are located below the runner, such that molten metal in the sprue overflows to the overflow ladles during pouring, and sequentially flows to the runner, the mold cavity and the riser after the overflow ladles are filled. Also provided is electromagnetic stirring low-pressure casting pouring equipment comprising the pouring system. By means of the present electromagnetic stirring low-pressure casting pouring system, the additionally designed overflow ladles enable the collection of the initial molten metal, which contains a number of impurities, and provide effective filtration of the impurity-laden molten metal, thereby further ensuring the quality and properties of the casting.

The invention discloses a low-pressure casting mold for a high-toughness light-weight water meter shell, relates to the technical field of low-pressure casting, and aims to solve the technical problem that the quality of a casting is affected by pressure maintaining failure caused by precoagulation at a pouring gate. The low-pressure casting mold comprises a first cooling runner formed in a first mold core, and a second cooling runner formed in a second mold core; a first sealing plate used for sealing is arranged in the first water through hole, a second sealing plate used for sealing is arranged in the second water through hole, the first water through hole and the second water through hole are communicated with the first cooling flow channel and the second cooling flow channel in a matched mode, and an auxiliary cooling assembly is arranged in the first mold core. The auxiliary cooling assembly comprises a water passing pipe communicating with the first cooling flow channel and heat conduction rods arranged on the outer walls of the two sides of the water passing pipe. The device has the advantages that the cooling medium is recycled, the pouring gate early solidification is delayed, the pressure maintaining effect is guaranteed, the auxiliary cooling assembly strengthens local cooling, the cooling efficiency and the cooling uniformity are improved, and the casting shrinkage porosity defect is reduced.

The present invention provides a dual-action serial circulation high-purity aluminum melt low-pressure casting device and preparation method. The present invention can complete the purification and fine-graining preparation of aluminum alloy melt in a gas-fired heating furnace, and realize the low-pressure casting of complex structural metal products in a low-pressure casting furnace. The gas-fired heating furnace and the low-pressure casting furnace do not need to be mechanically transferred. By monitoring the melt level and opening and closing the automatic angle meter and the double-furnace stop plugs, the gas-fired heating furnace can dynamically replenish the aluminum alloy melt in the low-pressure casting furnace. This dynamic replenishment causes little fluctuation in the surface of the aluminum alloy melt in the low-pressure casting furnace, and does not generate significant turbulence, air entrainment, or slag inclusions. At the same time, the replenished aluminum alloy melt is of high quality and contains less oxidized slag inclusions, greatly improving the metallurgical quality of the melt.

The invention belongs to the field of aero-engines, and discloses a low-pressure casting process design method for a fuel regulator and the fuel regulator. According to the method, modeling is conducted on the fuel regulator to obtain a three-dimensional model of the fuel regulator; based on the three-dimensional model of the fuel regulator, numerical simulation is conducted on the liquid lifting, mold filling and cooling solidification processes of the casting to predict metallurgical defects of the casting, the metallurgical defects of the casting are analyzed, and a simulation result is obtained; and optimizing low-pressure casting process parameters or / and a process based on an analog simulation result to finally obtain a low-pressure casting process optimization scheme of the fuel regulator. By adopting the method, the forming quality of the complex casting is improved, the blindness of trial-manufacturing depending on experience in the traditional process is reduced, and the product percent of pass is improved while the research and development period is shortened; and the cost loss caused by defect repair is greatly reduced, and a systematic process guarantee is provided for efficient and precise manufacturing of the aero-engine fuel regulator.

The utility model provides die-casting demolding equipment for a stainless steel pot, belongs to the technical field of stainless steel pot production, and solves the problems that the existing die-casting demolding equipment for the stainless steel pot is low in automation level, poor in demolding effect and the like. Comprising a hydraulic frame and two moving frame assemblies, a lower mold is arranged in the middle of the bottom of the hydraulic frame, a preheating resistor and a cooling pipeline are arranged in the lower mold, an upper mold lifting assembly is arranged in the middle of the top of the hydraulic frame, two spraying assemblies are arranged on the left side and the right side of the hydraulic frame, and a crucible mechanism is arranged in the middle of the top of the moving frame assembly on the front side. A suction cup lifting assembly is arranged in the middle of the top of the rear side moving frame assembly, a conveyor is arranged on the lower portion in the rear side moving frame assembly, and a release agent storage box and a spraying pump are arranged on the left side of the hydraulic frame. The automatic demolding device can be used for efficiently spraying a demolding agent, automatically injecting stainless steel melt, accelerating the molding of a stainless steel pot, quickly demolding the stainless steel pot and carrying and blanking, and is good in demolding effect and wide in application range.

The invention relates to the technical field of magnesium-aluminum alloy casting, and discloses a magnesium-aluminum alloy high-pressure casting rapid cooling and defect inhibition process which comprises the following steps: S1, mold preheating; s2, nitrogen replacement is conducted; S3, a release agent is sprayed to the interior of the cavity under the inert atmosphere; s4, magnesium-aluminum alloy molten metal with the temperature ranging from 650 DEG C to 700 DEG C is pressed into the cavity at the injection specific pressure ranging from 80 MPa to 120 MPa and the mold filling speed ranging from 5 m / s to 8 m / s; s5, a subarea cooling structure is designed based on the wall thickness difference of different areas of the casting, gradient cooling is conducted on the casting, in the cooling process, the hot train risk is judged by calculating a thermal stress value, and cooling medium parameters are regulated and controlled by calculating a cooling rate value; and S6, the casting is taken out. Traditional cooling is changed into a partition gradient type, defects are controlled according to a formula and AI, double-pipeline nitrogen is used for preventing oxidation, cost is reduced, and technical practicability and innovation are improved.

The invention relates to the technical field of low-pressure casting, and discloses an automatic low-pressure casting hub production device which comprises a casting table, two half side molds are arranged above the casting table, a complete side mold is formed when the two half side molds are combined together, and a bottom mold is arranged at the bottoms of the two half side molds; an inner mold is arranged in the two half side molds and located over the bottom mold, a plurality of bosses are arranged on the upper surface of the inner mold, a driving assembly is arranged above the inner mold, a pulling-open assembly is arranged on one side of the two half side molds, and an overturning assembly is arranged at the bottom of the bottom mold. The casting stability is improved, the quality and the shape precision of the hub are ensured through the stable casting process and the precise mold design, automatic demolding and taking-out of the hub are achieved under the cooperative work of the driving assembly, the pulling-open assembly and the overturning assembly, manual operation is reduced, and the production efficiency is improved.

The utility model relates to the technical field of aluminum alloy low-pressure casting molds, and discloses an aluminum alloy low-pressure casting mold exhaust structure which comprises a lower mold, an upper mold is arranged at the top of the lower mold, an exhaust barrel is fixedly assembled at the top of the upper mold, an L-shaped frame is fixedly assembled at the top of the upper mold, and a plurality of exhaust holes are formed in the L-shaped frame. An adjusting plate is rotationally connected to the top of the inner wall of the L-shaped frame, a connecting pipe is fixedly assembled on the inner wall of the L-shaped frame, an air collecting bag is fixedly assembled at the end, away from the L-shaped frame, of the connecting pipe, and an electromagnetic valve air inlet pipe is fixedly assembled on the side face of the air collecting bag. Through cooperative use of an adjusting plate and a butt joint plate, an adjusting rod is used for driving a round rod to move, so that the round rod is used for driving the butt joint plate to adjust the height until the side face of the butt joint plate is away from the inner wall of a butt joint groove, and then the adjusting plate is rotated in the inner wall of an L-shaped frame, so that different dustproof plugs are assisted to be in butt joint with the inner wall of a connecting pipe; therefore, the dustproof plugs with different diameters are adjusted to be erected.

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.

The invention belongs to the technical field of low-pressure casting, and particularly discloses a CT stress arm low-pressure casting device and method. The CT stress arm low-pressure casting device comprises an equipment body, a fixed platform is arranged on the equipment body, a casting mold mechanism is arranged at the top of the fixed platform, a heat preservation furnace is arranged at the bottom of the fixed platform, and a material taking mechanism is arranged on the equipment body. The position of a moving block can be adjusted through an adjusting structure, the area of the material taking disc is increased, meanwhile, the moving block drives a baffle to move when moving, castings can be pushed to move to the center of the material taking disc through the action of a third electric push rod and the adjusting block, the material taking disc can receive castings of different sizes and enable the castings to be located in the center of the material taking disc, and the casting taking efficiency is improved. And therefore, vibration generated in the operation process of the equipment body can be prevented, castings which are not matched with the material taking disc can be prevented from moving or deviating, and the casting material taking efficiency and the casting quality of the castings can be improved conveniently.

The present invention belongs to the technical field of subframes, and provides a multi-directional core-pulling aluminum alloy subframe, which includes a main body integrally formed by high-pressure casting. The main body includes two cross beams, two longitudinal beams, a front control arm bracket, and a rear control arm bracket. The longitudinal beams are connected between the cross beams. The cross beams are provided with body mounting holes, and on the body mounting holes, there are front-to-rear core-pulling structures extending towards the longitudinal beams. The front control arm bracket and the rear control arm bracket are connected to the longitudinal beams, and on the longitudinal beam between the front control arm bracket and the rear control arm bracket, there is a lateral core-pulling structure. The advantages of the present invention are that by integrally casting and forming with aluminum alloy, the number of parts is integrated from 11 parts into 1 part, the welding process and assembly process are cancelled, the complexity of product manufacturing is reduced, the weight of the entire subframe is reduced by about 5%, and the modal of each position is improved by using the front-to-rear core-pulling structure and the front core-pulling structure. The modal performance of the entire subframe is improved by about 8%.

The invention relates to the technical field of forming casting equipment, in particular to metal impeller forming casting equipment which comprises a low-pressure casting machine body and a crucible, the crucible is arranged under the low-pressure casting machine body, and a casting mold is arranged at the upper end of the low-pressure casting machine body. By the adoption of the bottom-to-top mold filling process, pressurizing feeding of a casting in the solidification process can be achieved, the casting quality is improved, the structure of the liquid rising pipe is optimally designed, uniform mold filling of molten metal during casting is guaranteed, meanwhile, the backflow resistance of the molten metal in the liquid rising pipe can be improved, and impact on the bottom of a crucible due to direct falling of the molten metal is avoided; and the auxiliary cleaning mechanism and the casting mold filling mechanism are matched with each other, so that impurities at the bottom of the crucible are effectively cleaned, meanwhile, the inner wall of the bottom side of the riser tube can be self-cleaned, the impurities are prevented from being mixed into a casting mold, and the quality and efficiency of metal impeller forming casting are further improved.

The invention discloses a high-temperature-resistant new energy automobile electric drive shell aluminum alloy and a preparation method thereof. The aluminum alloy is different from an existing ADC12 aluminum alloy, the conditions of poor tensile strength and yield strength do not exist, the aluminum alloy is suitable for high-pressure casting production of parts with high requirements for strength and toughness, after forming, the tensile strength of an aluminum alloy component is 330-360 MPa, the yield strength is 230-250 MPa, the percentage elongation after fracture is 3.0%-5.0%, and the performance of the aluminum alloy component is higher than that of a conventional aluminum alloy forming component.

The invention provides a high-strength motor rotor aluminum alloy and a high-pressure casting method and application thereof, and relates to the technical field of new energy automobile motor rotor materials. The high-strength motor rotor aluminum alloy comprises 0.28%-0.32% of Si, 0.68%-0.74% of Mg, 0.3%-0.35% of Fe, smaller than or equal to 0.05% of Ti, smaller than or equal to 0.03% of Ga, smaller than or equal to 0.03% of Zn, smaller than or equal to 0.03% of Cu, smaller than or equal to 0.01% of Mn, smaller than or equal to 0.01% of inevitable impurities and the balance Al. Mg, Si and Fe are added into the aluminum alloy, and the ratio of all the elements is adjusted to be reasonable, so that the aluminum alloy has good flowability and castability, air holes, cracks and other defects are avoided in the high-pressure die-casting process, the obtained rotor further has excellent toughness, ductility and mechanical performance, the defects in the prior art are overcome, and the aluminum alloy rotor is suitable for industrial popularization.

The invention relates to the technical field of casting forming devices, and discloses a low-pressure casting forming device for an ultra-high voltage GIS aluminum alloy conductor, which comprises an upper mold and a lower mold, the upper mold and the lower mold are attached to each other, a cavity is arranged between the upper mold and the lower mold, one side of the lower mold is provided with a material injection port, and the upper mold is provided with a plurality of groups of support tables; the supporting table is arranged according to the shape of an ultra-high voltage GIS aluminum alloy conductor, the supporting table is located in a key area of a casting, such as a casting connecting part and an area with a special shape, and an adjusting assembly is arranged on the supporting table; a coating assembly is arranged between the upper mold and the lower mold; the adjusting assembly is used for adjusting the local cooling effect according to the casting process. And the coating assembly is used for coating the surface of the lower mold. Compared with the prior art, precise control over cooling and forming in the ultra-high-voltage GIS aluminum alloy conductor low-pressure casting process is achieved, and the size precision and use reliability of castings are guaranteed.

The invention relates to a manufacturing method of a light-weight heat-alloy-free automobile hub, which comprises the following steps of: firstly, preparing an alloy raw material, then smelting and casting, and casting a light alloy into a barrel shape by a gravity inclined casting method; then spinning the drum into the required wheel rim by using a spinning machine; machining is conducted after heat treatment is conducted, and a rim semi-finished product needed before wheel welding is formed; meanwhile, spokes in various shapes are cast through a vibration pressurizing casting method, and machining is carried out; the rim and the spoke are welded to form a hub blank through friction stir welding or inertia friction welding; and finally, through machining and surface treatment, the finished hub meeting the technical requirements is obtained, and the finished hub is packaged and warehoused. According to the light-weight heat-free alloy automobile hub, the fine grain casting spoke, the casting and spinning rim and the friction welding technology are adopted for producing the light-weight heat-free alloy automobile hub, the comprehensive performance of the hub is remarkably improved, light weight of the automobile hub is achieved, and the requirements of modern automobiles for light weight, strength and performance are met.

The invention relates to a numerical simulation and machine learning combined casting process optimization method and device.The method comprises the steps that during numerical simulation low-pressure casting, a mechanism model based on momentum conservation and energy conservation is adopted to solve a flow field and a temperature field, a volume function method is adopted to process a flowing free surface in the mold filling process, and the flow field and the temperature field are calculated; the microscopic segregation degree in the solidification process is determined according to the relation between the solidification solid phase fraction and the temperature, and a solidification temperature field simulation result is obtained; and according to the simulation result, adopting a Xinshan criterion representing the permeation feeding capacity of the solidified interdendritic liquid to predict the shrinkage cavity porosity so as to obtain the shrinkage cavity porosity volume, and adopting a machine learning method based on Gaussian process regression and heredity to predict the shrinkage cavity porosity under different low-pressure casting process conditions. Therefore, the problems that the design cost is high, the period is long, and the adaptability and robustness of the technological parameters are poor due to the fact that the selection of the casting technological parameters mostly depends on experience or repeated tests and a large number of simulation and actual trial casting tests are needed are solved.

The utility model discloses a low-pressure casting device for a direct mold filling flywheel casing, and belongs to the technical field of casting of automobile parts. A low-pressure casting device for a direct mold filling flywheel casing comprises a mold piece composed of a lower mold, a side mold and an upper mold, a mold core is arranged in the mold, a mold cavity is formed among the mold core, the lower mold, the side mold and the upper mold, and the low-pressure casting device further comprises a transition connecting device arranged on the lower mold. The transition connecting device is provided with a liquid inlet, a transition cavity and at least two groups of sprue gates, and the transition cavity is communicated with the mold cavity through the sprue gates; according to the utility model, through the arrangement of the transition connecting device, a pouring channel is omitted, a product is directly molded by pouring, solution materials in the pouring gate are saved, and the yield of the product is improved.

The invention relates to an integrated air spring air chamber low-pressure casting process which comprises the following specific steps: S1, a thin-wall hollow integrated structure is adopted, the wall thickness of a main body is 4 mm, and local mounting points are transited to 6-8 mm through a gradually-changed thickening design; a pouring system is designed according to the air spring structure, and the design that four parts are arranged at one pouring gate is adopted; s2, the inner cavity is formed by combining two sand cores, the two sand cores are the first sand core and the second sand core, and the inner cavity is formed between the first sand core and the second sand core; s3, the mold adopts an upper and lower mold parting structure; s4, the sand core is positioned in the X direction, the Y direction and the Z direction; s5, a plurality of cooling water channels are embedded in the hot spot area of the mold; s6, die exhaust channels are arranged at the molten aluminum intersection and the high point of a cavity, and three ejector rods are designed in total and evenly distributed in a non-key pressure-bearing area; and S7, setting process parameters of field production. By optimizing mold design, a pouring system and technological parameters, integrated forming of the air spring air chamber is achieved, and the weight is remarkably reduced while the product performance is guaranteed.

The invention discloses a high-transmittance laser welding reinforced PC / PBT composite material and a preparation method thereof, and belongs to the field of high polymer material modification. The composite material comprises the following nine components in parts by weight: 35-45 parts of PBT resin, 15-25 parts of siloxane copolymerized bisphenol A type PC resin, 20-28 parts of rectangular cross section glass fiber, a compound crystallization accelerator, an ester exchange inhibitor and the like. The preparation method comprises the ten steps of raw material pretreatment, premix preparation, twin-screw melt blending, electrode treatment, vacuum cooling die-casting forming and the like, electrode treatment is introduced into the core to eliminate internal stress, and vacuum cooling die-casting controls crystallization. According to the scheme, through cooperation of the low-light-absorption black powder, the rectangular glass fibers and multiple processes, the laser light transmittance of the material is larger than or equal to 25%, the warping degree is smaller than 20 micrometers, the mechanical property is stable, the material is suitable for laser welding precision parts in the fields of automobiles and electronics, and the problems that an existing material is low in light transmittance and prone to warping are solved.