916 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 low-pressure casting and pouring system comprises a base, a sliding table, a lower die, a first rack, a second rack and an upper die, the sliding table is fixedly connected to the upper surface of the base in the left-right direction, the bottom of the lower die is fixedly connected with the top of the sliding table, and the lower die moves left and right through the sliding table; the first machine frame and the second machine frame are fixedly connected to the left end and the right end of the upper surface of the base correspondingly, the number of the first hydraulic oil cylinders is two, and the two first hydraulic oil cylinders are fixedly connected to the left end and the right end of the upper surface of the first machine frame correspondingly; the output end of the first hydraulic cylinder is fixedly connected with the top of the upper die. Alternating vibration of the lower die is achieved, the liquidity of molten aluminum can be improved, discharging of bubbles in a die cavity of the lower die can be enhanced, the quality of a formed aluminum bar is guaranteed, time and labor are saved during single grabbing and discharging of the aluminum bar, and the casting efficiency of the aluminum bar is improved.

The invention discloses an aluminum alloy metal mold low-pressure casting defect detection method, and relates to the technical field of alloy casting, and the method comprises the following steps: extracting a feature vector of a pre-processed prior defect picture and a feature vector of a pre-processed casting image, respectively calculating the similarity between the current feature vector and different reference feature vectors, and calculating the similarity between the current feature vector and the different reference feature vectors; and counting the occurrence frequency of the current defect, generating a casting decision, training a machine learning model for feeding back the current defect, and testing the machine learning model. The product quality and the production efficiency are improved through similarity calculation of the feature vectors and training of the machine learning model, manual intervention and errors are reduced by using the machine learning model and automatic decision generation, the defect detection and defect processing speed is increased, and the casting decision through statistics and weight calculation is more accurate. The importance and frequency of different defect types can be reflected more accurately, and a more effective quality management strategy can be formulated.

The invention belongs to but is not limited to the technical field of low-pressure casting processes, and discloses an intelligent temperature control system and method for a casting system, and integrated sensing modules are distributed according to feature areas of a casting mold and are used for monitoring temperature changes of different positions in the mold in real time; the data acquisition and processing module receives the data from the integrated sensing module, and preprocesses and stores the data; the central control module receives data provided by the data acquisition and processing module, and dynamically adjusts casting equipment and a temperature intelligent control system execution module according to preset casting process parameters and real-time data; and the execution module comprises a heating device and a cooling device and is used for adjusting process parameters of a heating channel and process parameters of a cooling channel according to an instruction of the central control system and intelligently regulating and controlling the temperature of the mold. According to the method, the temperature control accuracy can be improved, the temperature can be adjusted in time, and the purposes of optimizing the casting process, reducing defects and ensuring high-quality manufacturing of the aluminum alloy hub are achieved.

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 relates to the technical field of casting molds, and discloses a large GIS shell metal mold low-pressure casting mold which comprises an equipment fixing lower mold plate, a pressing mechanism, a mold body, an equipment movable upper mold plate, a movable mold plate and a casting system. The mold body is fixedly connected to the middle of the upper surface of the equipment fixing lower mold plate, the movable mold plate is installed on the upper surface of the mold body, a pouring gate is formed in the center of the lower surface of the equipment fixing lower mold plate, and the inner surface of the pouring gate is sleeved with a sprue bush. The movable mold plate comprises an equipment movable left mold plate and an equipment movable right mold plate which are oppositely arranged, a sand core is arranged in the mold main body, the casting system is arranged in the sand core, and the equipment movable upper mold plate is mounted on the upper surface of the mold main body; through cooperation of the structures, pressurization feeding can be conducted from the bottom, cooling of castings can be accelerated through metal outer mold inner cavity sand core low-pressure casting, and the technological yield of products is increased.

An aluminum wheel low-pressure casting mold filling process control device belongs to the technical field of automobile hub low-pressure casting and is provided with a bottom mold, a top mold and a side mold, the top mold and the bottom mold are used in cooperation to form the upper contour of a casting, and a plurality of temperature monitoring points, pressure monitoring points and a cooling system are arranged in the upper contour. The side die is used in cooperation with the bottom die and the top die, a plurality of temperature monitoring points, pressure monitoring points and a cooling system are arranged on the side wall of the side die, and the temperature monitoring points, the pressure monitoring points and the cooling system are all electrically connected with a control system of the aluminum wheel low-pressure casting mold filling process control device. The temperature monitoring points and the pressure monitoring points are arranged, temperature distribution, pressure changes and metal flowing behaviors in the mold filling process are monitored in real time in combination with the data acquisition and analysis system, the mold active exhaust technology is further combined, the mold filling stability and consistency are ensured, and therefore the casting quality is remarkably improved, and the defect rate is reduced.

The invention relates to the technical field of metal casting, and discloses an aluminum alloy wheel low-pressure casting mold and a casting method.The aluminum alloy wheel low-pressure casting mold comprises a top mold, a side mold and a bottom mold, the top mold is provided with a top mold core, the top mold core comprises a left mold core, a right mold core, a front mold core and a rear mold core which are alternately arranged in the circumferential direction, and the left mold core and the right mold core are in sliding connection; first wedge-shaped faces are arranged on the left-right mold core and the front-back mold core, dovetail grooves are formed in the first wedge-shaped faces in the vertical direction, a center sliding block used for adjusting the top mold core is further included, dovetail protruding blocks corresponding to the dovetail grooves are arranged on the center sliding block, and the dovetail protruding blocks and the dovetail grooves are matched in an inserted mode and connected in a sliding mode. According to the method, the shape of the wheel blank rim is thickened without considering the draft angle, the operation of removing the thickened part of the rim through subsequent machining turning to form the concave rim is omitted, the workload of the machining procedure is reduced, the production efficiency is guaranteed, and the metal utilization rate is increased; meanwhile, the problem that internal defects of the wheel blank are exposed is avoided, and the wheel quality is guaranteed.

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.

The invention discloses a low-pressure casting multi-process parameter optimization method for an aluminum alloy wheel hub, and relates to the technical field of low-pressure casting of automobile hubs. The low-pressure casting multi-process parameter optimization method for the aluminum alloy wheel hub comprises the following steps: establishing a three-dimensional model of the aluminum alloy wheel hub; setting initial production process parameters; performing numerical simulation in the low-pressure casting process; analyzing mold key point temperature distribution; according to the temperature distribution, production process parameters are adjusted; the steps are repeatedly executed, the production process parameters are further optimized, and an optimal process parameter combination is obtained; acquiring and analyzing actual production data and constructing a model; and performing process parameter optimization by using a dynamic multi-target particle swarm. According to the method, optimization and real-time recommendation of equipment control process parameters can be achieved, it is ensured that the casting in production is free of casting defects, the casting quality is improved, intelligent optimization and recommendation of the production equipment process parameters are achieved, the experiment trial-manufacturing cost is effectively reduced, the production period is shortened, the production efficiency is accelerated, and the method is worthy of being popularized and used in the industry.

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 invention discloses a cooling effect stability evaluation method for an aluminum alloy wheel hub low-pressure casting cooling system, and relates to the technical field of automobile wheel hub low-pressure casting. Comprises: selecting a mold object; arranging a thermocouple, and collecting temperature data; changing the initial temperature of the temperature measuring point of the thermocouple, and further acquiring real-time temperature data; feature temperature data are extracted, and linear regression of initial temperature-feature temperature values is carried out; and carrying out temperature data fluctuation analysis, and quantitatively measuring the cooling effect stability of the cooling system according to the maximum value and minimum value indexes of the discrete point deviation fitting curve. The stability of the cooling effect of the cooling system can be visually reflected, the problem that testing cannot be achieved under the condition that the initial temperature of the mold is consistent is solved, and by analyzing the relation between the initial mold temperature and the characteristic temperature value and selecting the temperature value on the temperature curve before mold opening as the characteristic temperature value, the testing accuracy is improved. The complexity of curve analysis is avoided, and the method is worthy of industrial popularization and application.

The invention belongs to the technical field of detection equipment, and particularly relates to an automobile high-pressure casting mold performance detection device and method, and the device comprises a pedestal which is fixedly connected with a fixed frame; the arc-shaped guide rail is fixedly connected below the fixing frame; the detection assembly is connected to the arc-shaped guide rail in a sliding mode, and the detection assembly detects the performance of the casting mold through two testing methods of impacting and pressing; the clamp table is fixedly connected to the base; the detection assembly comprises a sliding frame, a lifting seat is slidably connected to the sliding frame, a fixing rod is fixedly connected to the lifting seat, a pressing block is fixedly connected to the lower end of the fixing rod, and a pressure sensor is installed on the fixing rod; a vertical frame is fixedly connected to the sliding frame, and a liftable driving seat is connected to the vertical frame; according to the detection assembly, the driving seat and the lifting seat are arranged, so that the detection assembly can have two testing methods of impact and pressure application on the casting mold, and the testing result of the casting mold is more comprehensive and accurate.

The invention discloses a metal mold aluminum alloy low-pressure casting device and method, and belongs to the field of low-pressure casting. The metal mold aluminum alloy low-pressure casting device comprises a base, the top of the base is fixedly connected with a crucible and a supporting column, the top of the supporting column is fixedly connected with a supporting table, the side wall of the crucible is communicated with an air injection pipe, and the top of the supporting table is fixedly connected with a bottom die; two semicircular side dies are symmetrically arranged on the front portion and the rear portion of the bottom die, an upper die is arranged on the tops of the two side dies, and a liquid rising pipe is fixedly connected to the top of the crucible; according to the invention, the problems of stress and deformation caused by overlarge temperature difference of the mold are reduced, the dimensional precision and surface smoothness of a product are maintained, the product quality is improved, the problem of cracks or deformation on the surface of the mold possibly caused by overhigh cooling speed is prevented, the service life of the mold is further prolonged, and the quality of a casting is further improved.

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 utility model relates to the technical field of die cooling, in particular to a multi-section cooling device of an aluminum alloy pressure casting die, which comprises a water tank, a cooler is fixedly connected below the front side of the water tank, a support frame is fixedly connected to the top of the water tank, and a transmission case is fixedly connected to the top of the support frame. A lifting frame is arranged in the supporting frame, a control table is fixedly connected to the right side of the supporting frame, a lifting mechanism is arranged in the transmission box, and a pushing mechanism is arranged in the lifting frame. The lifting and pushing of the die improves the convenience and stability of the device.

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 invention discloses a light-weight aluminum alloy casting low-pressure forming device and an operation technology, and the light-weight aluminum alloy casting low-pressure forming device comprises a heat preservation furnace which is installed on a lifting base and is provided with a liquid rising pipe, an opening and closing cylinder installed on a support, and an upper mold installed at the lower end of the opening and closing cylinder, a connecting pipeline matched with the output end of the air compressor is arranged on the outer wall of the heat preservation furnace, a pressure relief pipeline is further arranged on the heat preservation furnace, and the heat preservation furnace further comprises a gas rapid filling unit. The low-pressure casting machine is provided with the quick gas filling unit, so that a large amount of nitrogen can be quickly filled into the furnace, the gas filling time is shortened, the working efficiency of the low-pressure casting machine is greatly improved, and the quick gas filling unit can be repeatedly used by releasing the nitrogen in the furnace into the hollow pipe for the first time; and meanwhile, the nitrogen is extruded by the gravity of the heavy object to maintain the air pressure in the furnace to reach a set constant pressure range, and the device is also suitable for different liquid levels of molten aluminum alloy in the furnace.

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 discloses a pressure casting forming die for a synchronous belt pulley, and relates to the technical field of belt pulley production. The pressure casting forming die for the synchronous belt pulley comprises a workbench, an upper die plate driven by an electric telescopic rod is assembled on the top of the workbench, an electric rotating rod is assembled on the top of the workbench, and the outer side of the electric rotating rod is in transmission connection with a lower die plate; an overturning demolding assembly is arranged on the side face of the workbench and comprises a first hydraulic device. According to the pressure casting forming die for the synchronous belt pulley, after casting forming operation is completed, the upper die plate is reset, an electric rotating rod is started, the lower die plate is driven to rotate, and a first hydraulic device, an arc-shaped rod, an ejector rod, a toothed rod, a first spring, an extrusion block, a fixing plate, a rotating shaft, a gear and an elastic cam are matched, so that the pressure casting forming die can be used for some turnover dies; and the molded belt pulley is more convenient during demolding, so that the use efficiency of the device is improved.

The invention belongs to the field of aluminum alloy casting processes, and relates to a design method of a pouring system for casting a large wallboard component. Firstly, the mold filling process of molten metal is not only driven by pressure in a low-pressure casting machine, but also driven by gravity, the mold filling capacity of the molten metal in the thin-wall structure is enhanced, and complete forming of the thin-wall structure is easy to achieve; secondly, the thick cross gate cannot form a complete whole during casting, so that the non-uniformity of residual stress in the casting process is greatly reduced, and the deformation in the casting process is reduced; and finally, the structure of a pouring system is simplified, modeling and assembling are simplified, a casting mold does not need to be overturned, the workload is reduced, and it is guaranteed that the position of a mold core is stable.

The invention relates to the technical field of low-pressure casting, in particular to a low-pressure casting device for an aluminum alloy component, which comprises a base, a rotary table rotationally arranged on the base, two holding furnaces arranged on the rotary table, a lifting table arranged on the base and positioned above the holding furnaces, a liquid lifting pipe arranged at the bottom of the lifting table, and a rotating plate rotationally connected to the inner bottom of each holding furnace, two first gears are rotatably arranged between the bottom of the rotary table and the base, the two first gears and the two rotary plates are coaxially arranged respectively, a rotary rod is rotatably arranged on one side of the base, a second gear is fixedly connected to the lower end of the rotary rod, and the second gear is fixedly connected to the other side of the rotary rod. The second gear is in meshing transmission with the first gear. The scraping rods are arranged in the heat preservation furnace to automatically scrape the inner wall and the outer wall of the liquid rising pipe, solid particles formed by solidification of residual molten metal are effectively removed, the situation that the solid particles enter a cavity to cause casting defects is avoided, and the internal quality of aluminum alloy components is guaranteed.

The utility model relates to the technical field of low-pressure casting machines, and discloses a low-pressure casting machine which comprises a base, a mold groove is formed in the top of the base, a connecting cavity is formed in the base, and the left side and the right side of the top of the base are each provided with two stand columns which are symmetrically distributed front and back. The tops of the two stand columns on the left side are provided with fixed transverse plates fixedly connected with the tops of the two stand columns on the right side, and the exteriors of the two stand columns on the left side are provided with downward pressing seats slidably connected with the exteriors of the two stand columns on the right side. According to the low-pressure casting machine, by arranging the stripping assembly, when a cast workpiece needs to be demolded, two servo motors, a disc, a circular shaft and a connecting rod are used in cooperation, so that a sliding plate drives an extension rod and a stripping plate to move upwards, the workpiece is ejected out of a mold groove, and then the purpose that the workpiece is demolded conveniently is achieved; manual demolding by staff is not needed, the demolding efficiency is improved, the practicability of the device is improved, and the device is convenient to use by the staff.

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.

The invention belongs to the technical field of low-pressure casting, and particularly relates to a compressor screw rotor low-pressure casting forming mold which comprises a bottom plate, a base is fixedly connected to the upper side wall of the bottom plate, pouring gates are formed in the side walls of the bottom plate and the base, and a mold body is fixedly connected to the upper side wall of the base. The upper side wall of the mold body is fixedly connected with four guide columns, and the upper ends of the four guide columns are fixedly connected with the same top plate. After the screw rotor in the forming die is cast and taken out, impurities such as molten metal and materials remaining on the inner wall of a cavity of the die can be automatically cleaned, next casting is prevented from being affected, meanwhile, the abrasion degree in the cavity is automatically detected, and after it is detected that the inner wall of the cavity is abraded, the screw rotor is automatically removed. And an operator can be reminded in time to repair the cavity, so that the die-casting quality of the compressor screw rotor is ensured.

The utility model provides an aluminum alloy die casting surface polishing device, and relates to the field of aluminum alloy die casting machining equipment.The aluminum alloy die casting surface polishing device comprises a machining table used for polishing an aluminum alloy die casting, and a containing assembly and machining equipment used for polishing the aluminum alloy die casting are arranged in the machining table; and overturning equipment is further arranged in the machining table, the aluminum alloy die castings on the top of the containing assembly are clamped and limited through a first air cylinder and an extrusion assembly, a rotating disc is driven to rotate through a driving piece, and the rotating disc and a movable disc are connected through a synchronous belt; the rotating disc rotates to drive the movable disc to synchronously rotate at the same time, the movable disc rotates to drive the first air cylinder to rotate, and therefore the aluminum alloy die casting clamped by the first air cylinder and the extrusion assembly is overturned, and through the structure, other surfaces of the aluminum alloy die casting are conveniently ground; and the grinding efficiency is improved to a certain extent, and the machining efficiency is improved.

The invention provides an MIG welding method for a high-pressure aluminum die casting and a profile, and relates to the technical field of welding. Direct-current pulse current is adopted for welding in the arc striking stage, and relatively high welding current is adopted, so that the heat input quantity in the arc striking stage is increased, and it is ensured that a molten pool can be rapidly formed; after arc striking is completed, on the basis of reducing the welding current, the direct-current pulse current is gradually switched into the variable-polarity pulse current, and the time proportion of the negative polarity stage in the welding current waveform is gradually increased, so that the melting speed of the welding wire in the welding process is increased, and the welding wire filling amount in a welding bead is increased; and meanwhile, heat accumulation in the welding process can be reduced, generation of air holes in a molten pool can be effectively restrained, and therefore the air hole defects in a welding sample can be reduced. In addition, the welding current is gradually reduced before the arc suppression stage, and variable polarity short circuit is adopted for arc suppression, so that it is ensured that craters are full in the welding process, and pore defects in a welding sample are reduced.

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.