CN115707539A - Method, pulping machine and system for semi-solid metal slurry die-casting molding - Google Patents
Method, pulping machine and system for semi-solid metal slurry die-casting molding Download PDFInfo
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- CN115707539A CN115707539A CN202110946236.4A CN202110946236A CN115707539A CN 115707539 A CN115707539 A CN 115707539A CN 202110946236 A CN202110946236 A CN 202110946236A CN 115707539 A CN115707539 A CN 115707539A
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Abstract
The invention discloses a method for die-casting and molding semi-solid metal slurry, which comprises the steps of preparing liquid metal slurry into semi-solid metal slurry through a slurrying machine, and enabling the semi-solid metal slurry to enter a die-casting die cavity and be die-cast and molded. The pulping machine comprises a vacuum box, the vacuum box comprises an upper cover and a box body which are closed to form a closed space, the upper cover is connected with a vacuumizing device and a stirring device, the upper cover is connected with a driving mechanism capable of driving the box body to move relative to the upper cover, and the box body is arranged below the upper cover. The invention has reasonable and ingenious design, and the pulping machine is arranged, so that the high-temperature metal liquid is changed into the semi-solid metal slurry with relatively low temperature, and the temperature of the slurry is low in the forming process, so that the service life of the die-casting die can be prolonged, the metallographic structure of the product is improved, sand holes and air holes are reduced, and the mechanical property of the product is improved.
Description
Technical Field
The invention relates to metal die casting, in particular to a method for semi-solid metal slurry die casting forming, a pulping machine and a system for the method.
Background
In the prior art, because the temperature of the molten metal in a hot melting state is high, in the forming process of the traditional metal die casting, defects such as sand holes, air holes, shrinkage cavities and the like are easy to occur, and the organization structure of a product is loose. And after the die-casting die works at high temperature and high pressure for a long time, the erosion phenomenon appears on the surface of the die, and the service life of the die is shortened.
A method of die casting a semi-solid metal slurry, a pulper and a system for the method that overcome the above problems are needed.
Disclosure of Invention
In order to solve the problems, the invention discloses a method for semi-solid metal slurry die-casting molding.
The invention also discloses a pulping machine and a semi-solid metal slurry die-casting molding system for the method.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a semi-solid metal slurry is made into semi-solid metal slurry through pulping machine, and then the semi-solid metal slurry is fed into die-casting mould cavity and die-cast. After the semi-solid forming technology is combined with a corresponding die-casting die, the existing problems can be solved, and meanwhile, the mechanical property and the heat dissipation performance of the product are improved.
As a further improvement of the invention, the method comprises the following steps:
step 1: putting the metal ingot into a smelting furnace, setting the temperature of the smelting furnace as a first temperature, and melting the metal ingot into liquid metal;
step 2: putting the liquid metal into a vacuum box of a pulping machine, stirring in a vacuum state, setting the stirring speed, and making the liquid metal into semi-solid metal slurry when the temperature in the vacuum box reaches a set second temperature;
and 3, step 3: putting the semi-solid metal slurry into an inlet of a pressure chamber of a die casting machine;
and 4, step 4: and (4) operating the die casting machine, and forming the semi-solid metal slurry in a die casting die cavity.
As a further improvement of the invention, in the step 1, the metal ingot is an aluminum ingot, the aluminum ingot is put into a melting furnace, the first temperature is 660 ± 30 ℃, and the aluminum ingot is melted into liquid aluminum;
in the step 2, the vacuum state in the vacuum box is more than 60%, the stirring speed is 1000 +/-100 revolutions per minute, and the second temperature is 600 +/-15 ℃, so that the liquid aluminum becomes semi-solid slurry.
As a further improvement of the invention, in the step 2 and the step 3, liquid aluminum is ladled out of the melting furnace through a soup feeder and is sent into a vacuum box of the pulping machine;
in the step 4, an injection rod of the die casting machine is started, the semi-solid slurry is injected into a die cavity from a pressure chamber for forming, the injection rod is started for pressurization for 4 +/-2 seconds, the pressure is maintained for 4 +/-2 seconds, and cooling forming is carried out; the injection pressure is 50 plus or minus 20MPa, and the injection speed is 3 plus or minus 1m/s.
The utility model provides a pulping machine, pulping machine includes the vacuum chamber, and this vacuum chamber covers on this and is connected with evacuating device and agitating unit including closing together upper cover and the box that forms airtight space, covers on this and is connected with the actuating mechanism that can order about the relative upper cover of this box and remove, the box sets up in the upper cover below.
As a further improvement of the invention, the pulping machine further comprises a machine table, wherein a lifting platform is movably arranged on the machine table, and the upper cover is fixedly arranged on the lower surface of the lifting platform.
As a further improvement of the invention, the stirring device comprises a stirring motor and a stirring rod, the stirring rod is fixedly connected with the output end of the stirring motor, the stirring motor is arranged on the lifting platform, and the stirring rod extends into the upper cover.
As a further improvement of the invention, the vacuum-pumping device comprises a vacuum-pumping suction nozzle which is fixed on the lifting platform, and the tail end of the vacuum-pumping suction nozzle extends into the upper cover.
As a further improvement of the present invention, the driving mechanism includes a screw rod driven by a driving motor to rotate, the screw rod is disposed on the machine platform, a screw rod nut is sleeved on the screw rod, the screw rod nut is fixed on the movable bracket, and the movable bracket is connected with the lifting platform.
The utility model provides a semi-solid metal thick liquids die-casting forming system, its includes die casting machine, smelting pot, gives hot water machine, sprayer, reclaimer and aforementioned pulper, and this pulper sets up in the portion one side of penetrating of this die casting machine, and this smelting pot sets up in the pulper right side, set up in the right side of smelting pot for the hot water machine, the spoon of giving the hot water machine corresponds the pressroom setting of pulper, smelting pot and die casting machine, this sprayer set up in the die casting machine top, and this reclaimer sets up in the opposite side of penetrating the portion of this die casting machine.
The invention has the beneficial effects that: the invention has reasonable and ingenious design, and the pulping machine is arranged, so that the high-temperature metal liquid is changed into the semi-solid metal slurry with relatively low temperature, and the temperature of the slurry is low in the forming process, thereby prolonging the service life of the die-casting die, improving the metallographic structure of a product, reducing sand holes and air holes and improving the mechanical property of the product.
The invention is further described with reference to the following detailed description and accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of a semi-solid metal slurry die-casting system of the present invention;
FIG. 2 is a schematic view of another angle of the semi-solid metal slurry die casting system of the present invention;
FIG. 3 is a schematic view of the structure of the pulper and the soup feeder of the present invention;
FIG. 4 is a schematic view of the structure of the pulper of the present invention;
FIG. 5 is a schematic view of another angle of the pulper of the present invention;
FIG. 6 is a schematic structural view of the elevating platform and the driving mechanism of the present invention;
FIG. 7 is a metallographic structure diagram of a die-cast product according to example 1.
Detailed Description
Example, referring to fig. 1 to 6, in the method for die-casting a semi-solid metal slurry provided in this example, a liquid metal slurry is made into a semi-solid metal slurry by a slurrying machine 1, and the semi-solid metal slurry is put into a die-casting mold cavity and is die-cast. After the semi-solid forming technology is combined with a corresponding die-casting die, the existing problems can be solved, and meanwhile, the mechanical property and the heat dissipation performance of the product are improved.
Example 1
As a further improvement of the method, the method comprises the following steps:
step 1: putting the metal ingot into a smelting furnace 2, setting the temperature of the smelting furnace 2 as a first temperature, and melting the metal ingot into liquid metal;
in this embodiment, an a360R aluminum ingot is placed in the melting furnace 2, and the aluminum ingot is melted into a liquid state. The liquid A360R comprises the following raw materials in percentage by weight: 9 to 10 percent of silicon (Si), less than or equal to 1.3 percent of iron (Fe), less than or equal to 0.6 percent of copper (Cu), less than or equal to 0.35 percent of manganese (Mn), 0.4 to 0.6 percent of magnesium (Mg), less than or equal to 0.5 percent of nickel (Ni), less than or equal to 0.5 percent of zinc (Zn), less than or equal to 0.15 percent of tin (Sn) and the balance of aluminum (Al).
Step 2: putting the liquid metal into a vacuum box of a pulping machine 1, stirring in a vacuum state, setting the stirring speed, and making the liquid metal into semi-solid metal slurry when the temperature in the vacuum box reaches a set second temperature;
in this embodiment, detect liquid level height for 3 liquid level detectors of soup machine, drive spoon 35, get the material angle through spoon 35, ladle out the liquid aluminium of corresponding weight from smelting pot 2, keep flat spoon 35 that contains liquid aluminium to putting into the vacuum chamber of pulper 1.
The upper cover 111 of the vacuum box of the pulping machine 1 is closed, the stirring rod 12 is inserted into the liquid aluminum, the vacuumizing device is started, the vacuum state is 85%, the stirring rod 12 starts stirring, when the temperature of the slurry reaches a set value, the stirring rod 12 stops stirring, and the upper cover 111 of the vacuum box is opened.
And step 3: putting the semi-solid metal slurry into an inlet of a pressure chamber of a die casting machine 8;
for hot water machine 3 to start, drive the feed spoon 35 to 8 pressure chambers of die casting machine enter the mouth, feed spoon 35 rotates and pours semi-solid metal thick liquids into 8 pressure chambers of die casting machine.
And 4, step 4: and (3) starting an injection rod of the die casting machine 8, injecting the semi-solid slurry into the die cavity from the pressure chamber for molding, increasing the start time of the injection rod for 4 seconds, maintaining the pressure for 4 seconds, and cooling for molding. The injection pressure was 50MPa and the injection speed was 3m/s.
And (3) opening the die of the die casting machine 8, separating the casting following die from the die cavity of the fixed die, starting the ejection mechanism to eject the casting out of the die cavity of the rear die, putting the part taking machine 4 into the middle of the die, clamping the material cake position of the casting by using the claw tongs, taking out the casting and putting the casting on the conveyor belt.
The belt of the conveyor belt 5 and the fan 9 are started, and the casting flows to the end of the oil press 6 along with the belt of the conveyor belt 5, so that cooling is completed.
And (4) putting the cooled casting into a punching die, starting a button 6 of an oil press, and removing a casting water gap and a slag ladle to obtain a product blank.
In the step 1, the metal ingot is an aluminum ingot, the aluminum ingot is put into a smelting furnace 2, the first temperature is 660 ℃, and the aluminum ingot is melted into liquid aluminum;
in the step 2, the vacuum state in the vacuum box is 85%, the stirring speed is 1000 rpm, the second temperature is 610 ℃, and the liquid aluminum is made into semi-solid slurry.
In the step 2 and the step 3, liquid aluminum is ladled out of the smelting furnace 2 through a feeding machine 3 and is sent into a vacuum box of the pulping machine 1;
in this embodiment, install die casting die on die casting machine 8, it is 1 to transfer release agent ratio machine proportion, and sprayer 7 is with even spraying of release agent on the front and back die face, and sprayer 7 reciprocates the number of times 3 times from top to bottom, and the upper and lower position corresponds the adjustment according to the mould size, and die casting machine 8 starts the compound die, locks the mould.
The detection is carried out on the product obtained by implementing the method, and the detection content is as follows:
1. metallographic analysis: selecting a plane with the area of 10mm multiplied by 5mm as a test surface on the casting obtained by the method, cutting and inlaying the selected sample, polishing the test surface into a bright and traceless mirror surface through coarse grinding, fine grinding, mechanical polishing and chemical polishing, corroding the polished test surface with hydrofluoric acid for 15 seconds, cleaning with alcohol, and placing under a metallographic microscope for observation, wherein the multiplying power of the microscope is 100 mu m. The metallographic effect is shown in fig. 7, the metallographic structure contains spherical crystals, and the intercrystalline structure is compact.
2. Mechanical properties: a tensile test method (GB/T228) is adopted, the experimental equipment is a tensile testing machine, a rectangular test piece is provided, the gauge length is 50mm, and the testing speed is 5mm/min. The test results are given in the following table:
3. heat conductivity: using laser flash (GB/T22588-2008), the test apparatus comprised an electronic balance XSE205DU, a thermal conductivity meter LFA467, a differential scanning calorimeter DSC214, temperature 23.4 ℃, humidity 54% rh, test model Cowan + pulse correction, and the test results are given in the following table:
according to the data, the die-casting product prepared by the semi-solid metal slurry die-casting forming method is improved in mechanical property and heat conductivity compared with the traditional die-casting product. The temperature of the semi-solid slurry is reduced, the temperature of the die is correspondingly reduced, and the service life of the die is synchronously prolonged.
The utility model provides a pulping machine 1, pulping machine 1 includes the vacuum box, and this vacuum box includes upper cover 111 and the box 112 that closes up mutually and form airtight space, is connected with evacuating device and agitating unit on this upper cover 111, is connected with the actuating mechanism that can order about this box 112 and remove relative upper cover 111 on this upper cover 111, box 112 sets up in the upper cover 111 below. The top end of the box body 112 or the bottom end of the upper cover 111 is provided with a sealant layer 113, so that the space in the vacuum box can be isolated from the outside when the upper cover 111 is folded with the box body 112, and the space in the vacuum box is vacuumized by a vacuuming device.
The pulping machine 1 further comprises a machine platform 13, a lifting platform 14 is movably arranged on the machine platform 13, and the upper cover 111 is fixedly arranged on the lower surface of the lifting platform 14. The lifting platform 14 is driven to lift by a lifting cylinder 15. The lifting cylinder 15 is fixed on a lifting cylinder bottom plate 19, and the output end of the lifting cylinder 15 is fixedly connected with the lifting platform 14.
The stirring device comprises a stirring motor 16 and a stirring rod 12, the stirring rod 12 is fixedly connected with the output end of the stirring motor 16, the stirring motor 16 is arranged on the lifting platform 14, and the stirring rod 12 extends into the upper cover 111.
The vacuum pumping device comprises a vacuum pumping nozzle 17, the vacuum pumping nozzle 17 is fixed on the lifting platform 14, and the tail end of the vacuum pumping nozzle 17 extends into the upper cover 111. In this embodiment, the top end of the vacuum suction nozzle 17 is connected to a vacuum device through a pipeline, and the vacuum device is a prior art.
The driving mechanism comprises a screw rod 182 driven to rotate by a driving motor 181, the screw rod 182 is arranged on the machine table 13, a screw rod nut is sleeved on the screw rod 182, the screw rod nut is fixed on a movable support 183, the movable support 183 is connected with the lifting platform 14, specifically, the lifting cylinder bottom plate 19 is fixedly connected with the movable support 183 through a plurality of upright posts 184, and the upright posts 184 penetrate through the lifting platform 14. When the driving cylinder 15 drives the lifting platform 14 to descend, the upper cover 111 is folded with the box body 112, and a closed space can be formed.
After the liquid metal becomes semi-solid metal slurry in the vacuum chamber, the lifting cylinder 15 drives the lifting platform 14 to ascend, so that the upper cover 111 is separated from the chamber body 112, the driving motor 181 drives the screw rod 182 to rotate, the lifting platform 14 is driven to move, the upper cover 111 is separated from the chamber body 112, and the slurry can be conveniently scooped out by the material spoon.
In this embodiment, the moving bracket 183 is provided with a through hole, and the lead screw nut is fixed in the through hole.
Two guide rails 131 are arranged on the lower surface of the machine platform 13 in parallel, the movable bracket 183 is i-shaped, a sliding part 132 matched with the guide rails 131 is arranged on the movable bracket 183, and the sliding part 132 is sleeved on the sliding rail, so that the movable bracket 183 can be driven by the screw rod 182 to slide.
The utility model provides a semi-solid metal thick liquids die-casting forming system, its includes die casting machine 8, smelting pot 2, gives hot water machine 3, sprayer 7, reclaimer and aforementioned pulper 1, and this pulper 1 sets up in this die casting machine 8's the portion one side of penetrating, and this smelting pot 2 sets up in 1 right side of pulper, give hot water machine 3 and set up in the right side of smelting pot 2, give hot water machine 3's spoon 35 to correspond pulper 1, smelting pot 2 and die casting machine 8's pressure room setting, this sprayer 7 sets up in die casting machine 8 top, and this reclaimer sets up in this die casting machine 8's the opposite side of penetrating the portion.
In the invention, a die casting machine 8 is adopted as processing equipment, a smelting furnace 2 is adopted as raw material melting equipment, a pulping machine 1 is adopted as semisolid slurry preparation equipment, a soup feeder 3 is adopted as slurry transportation equipment, a sprayer 7 is adopted as equipment for spraying a release agent on a die, a piece taking machine 4 is adopted as equipment for taking out a formed casting, a conveyor belt 5 is adopted as casting transportation equipment, an oil press 6 is adopted as equipment for removing a water gap and a slag ladle, the left side of the piece taking machine 4 is provided with the conveyor belt 5, the right side of the piece taking machine 4 is provided with a release agent proportioning machine, and the left side of the conveyor belt 5 is provided with the oil press 6.
This give hot water machine 3 including giving hot water support 31, be equipped with lateral shifting track 32 for hot water support 31, be equipped with sliding base 33 on this lateral shifting track 32 slidable, be equipped with arm 34 on sliding base 33, spoon 35 sets up in this arm 34 is terminal, drives spoon 35 through arm 34, ladles out the metal liquid from smelting pot 2 to the box 112 of vacuum box, and after handling messenger metal liquid becomes semi-solid metal thick liquids, drive spoon 35 by arm 34 again, ladles out semi-solid metal thick liquids to the plenum inlet of die casting machine 8.
The invention has reasonable and ingenious design, and the pulping machine 1 is arranged, so that high-temperature metal liquid is changed into semi-solid metal slurry with relatively low temperature, the temperature of the slurry is low in the forming process, the service life of a die-casting die can be prolonged, the metallographic structure of a product is improved, sand holes and air holes are reduced, and the mechanical property of the product is improved.
Example 2
As a further improvement of the method, the method comprises the following steps:
step 1: putting the metal ingot into a smelting furnace 2, setting the temperature of the smelting furnace 2 as a first temperature, and melting the metal ingot into liquid metal;
in this embodiment, an a360R aluminum ingot is placed in the melting furnace 2, and the aluminum ingot is melted into a liquid state. The liquid A360R comprises the following raw materials in percentage by weight: 9 to 10 percent of silicon (Si), less than or equal to 1.3 percent of iron (Fe), less than or equal to 0.6 percent of copper (Cu), less than or equal to 0.35 percent of manganese (Mn), 0.4 to 0.6 percent of magnesium (Mg), less than or equal to 0.5 percent of nickel (Ni), less than or equal to 0.5 percent of zinc (Zn), less than or equal to 0.15 percent of tin (Sn) and the balance of aluminum (Al).
And 2, step: putting the liquid metal into a vacuum box of a pulping machine 1, stirring in a vacuum state, setting the stirring speed, and making the liquid metal into semisolid metal slurry when the temperature in the vacuum box reaches a set second temperature;
in this embodiment, detect liquid level height for 3 liquid level detectors of soup machine, drive spoon 35, get the material angle through spoon 35, ladle out the liquid aluminium of corresponding weight from smelting pot 2, keep flat spoon 35 that contains liquid aluminium to putting into the vacuum chamber of pulper 1.
The upper cover 111 of the vacuum box of the pulping machine 1 is closed, the stirring rod 12 is inserted into the liquid aluminum, the vacuumizing device is started, the vacuum state is 60%, the stirring rod 12 starts stirring, when the temperature of the slurry reaches a set value, the stirring rod 12 stops stirring, and the upper cover 111 of the vacuum box is opened.
And step 3: putting the semi-solid metal slurry into an inlet of a pressure chamber of a die casting machine 8;
for hot water machine 3 to start, drive the feed spoon 35 to 8 pressure chambers of die casting machine enter the mouth, feed spoon 35 rotates and pours semi-solid metal thick liquids into 8 pressure chambers of die casting machine.
And 4, step 4: and (3) starting an injection rod of the die casting machine 8, injecting the semi-solid slurry into the die cavity from the pressure chamber for molding, increasing the start time of the injection rod for 2 seconds, maintaining the pressure for 2 seconds, and cooling for molding. The injection pressure was 30MPa and the injection speed was 2m/s.
And (3) opening the die of the die casting machine 8, separating the casting following die from the die cavity of the fixed die, starting the ejection mechanism to eject the casting out of the die cavity of the back die, clamping the material cake position of the casting by using the claw tongs in the middle of the taking machine 4, and taking out the casting to place on the conveyor belt.
The belt of the conveyor belt 5 and the fan 9 are started, and the casting flows to the end of the oil press 6 along with the belt of the conveyor belt 5, so that cooling is completed.
And (4) putting the cooled casting into a punching die, starting a button 6 of an oil press, and removing a casting water gap and a slag ladle to obtain a product blank.
In the step 1, the metal ingot is an aluminum ingot, the aluminum ingot is placed in a melting furnace 2, the first temperature is 630 ℃, and the aluminum ingot is melted into liquid aluminum;
in the step 2, the vacuum state in the vacuum box is 60%, the stirring speed is 900 rpm, the second temperature is 585 ℃, and the liquid aluminum becomes semi-solid slurry.
In the step 2 and the step 3, liquid aluminum is ladled out of the smelting furnace 2 through a feeding machine 3 and is sent into a vacuum box of the pulping machine 1;
in this embodiment, install die casting die on die casting machine 8, it is 1 to adjust release agent ratio machine proportion, and sprayer 7 is even with the spraying of release agent on front and back die face, and sprayer 7 reciprocates the number of times 3 from top to bottom, and the upper and lower position corresponds the adjustment according to the mould size, and die casting machine 8 starts the compound die, locks the mould.
Example 3
As a further improvement of the method, it comprises the following steps:
step 1: putting the metal ingot into a smelting furnace 2, setting the temperature of the smelting furnace 2 as a first temperature, and melting the metal ingot into liquid metal;
in this embodiment, an a360R aluminum ingot is placed in the melting furnace 2, and the aluminum ingot is melted into a liquid state. The liquid A360R comprises the following raw materials in percentage by weight: 9 to 10 percent of silicon (Si), less than or equal to 1.3 percent of iron (Fe), less than or equal to 0.6 percent of copper (Cu), less than or equal to 0.35 percent of manganese (Mn), 0.4 to 0.6 percent of magnesium (Mg), less than or equal to 0.5 percent of nickel (Ni), less than or equal to 0.5 percent of zinc (Zn), less than or equal to 0.15 percent of tin (Sn) and the balance of aluminum (Al).
And 2, step: putting the liquid metal into a vacuum box of a pulping machine 1, stirring in a vacuum state, setting the stirring speed, and making the liquid metal into semi-solid metal slurry when the temperature in the vacuum box reaches a set second temperature;
in this embodiment, the liquid level detector of the soup supplier 3 detects the liquid level, drives the ladle 35 to scoop out the liquid aluminum with corresponding weight from the melting furnace 2 through the material taking angle of the ladle 35, and the ladle 35 filled with the liquid aluminum is horizontally placed in the vacuum box of the pulper 1.
The upper cover 111 of the vacuum box of the pulping machine 1 is closed, the stirring rod 12 is inserted into the liquid aluminum, the vacuumizing device is started, the vacuum state is 85%, the stirring rod 12 starts stirring, when the temperature of the slurry reaches a set value, the stirring rod 12 stops stirring, and the upper cover 111 of the vacuum box is opened.
And step 3: putting the semi-solid metal slurry into an inlet of a pressure chamber of a die casting machine 8;
for hot water machine 3 to start, drive the feed spoon 35 to 8 pressure chambers of die casting machine enter the mouth, feed spoon 35 rotates and pours semi-solid metal thick liquids into 8 pressure chambers of die casting machine.
And 4, step 4: and (3) starting an injection rod of the die casting machine 8, injecting the semi-solid slurry into the die cavity from the pressure chamber for molding, increasing the start time of the injection rod for 6 seconds, maintaining the pressure for 6 seconds, and cooling for molding. The injection pressure was 70MPa, and the injection speed was 4m/s.
And (3) opening the die of the die casting machine 8, separating the casting following die from the die cavity of the fixed die, starting the ejection mechanism to eject the casting out of the die cavity of the rear die, putting the part taking machine 4 into the middle of the die, clamping the material cake position of the casting by using the claw tongs, taking out the casting and putting the casting on the conveyor belt.
The belt of the conveyor belt 5 and the fan 9 are started, and the casting flows to the end of the oil press 6 along with the belt of the conveyor belt 5, so that cooling is completed.
And (4) putting the cooled casting into a punching die, starting a button 6 of an oil press, and removing a water gap and a slag ladle of the casting to obtain a product blank.
In the step 1, the metal ingot is an aluminum ingot, the aluminum ingot is put into a smelting furnace 2, the first temperature is 690 ℃, and the aluminum ingot is melted into liquid aluminum;
in the step 2, the vacuum state in the vacuum box is 85%, the stirring speed is 1100 rpm, the second temperature is 615 ℃, and the liquid aluminum is made into the semi-solid slurry.
In the step 2 and the step 3, liquid aluminum is ladled out of the smelting furnace 2 through a feeding machine 3 and is sent into a vacuum box of the pulping machine 1;
in this embodiment, install die casting die on die casting machine 8, it is 1 to adjust release agent ratio machine proportion, and sprayer 7 is even with the spraying of release agent on front and back die face, and sprayer 7 reciprocates the number of times 3 from top to bottom, and the upper and lower position corresponds the adjustment according to the mould size, and die casting machine 8 starts the compound die, locks the mould.
The foregoing is illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the invention in any way. Those skilled in the art can make many possible variations and modifications to the invention using the above disclosed technical means and teachings, or can modify equivalent embodiments with equivalent variations, without departing from the scope of the invention. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the technical scheme of the present invention shall be covered by the protection scope of the present invention.
Claims (10)
1. A method for die-casting semisolid metal slurry is characterized in that the liquid metal slurry is made into semisolid metal slurry through a slurrying machine, and the semisolid metal slurry enters a die-casting die cavity and is die-cast and molded.
2. A method of die casting a semi-solid metal slurry according to claim 1, including the steps of:
step 1: putting the metal ingot into a smelting furnace, setting the temperature of the smelting furnace as a first temperature, and melting the metal ingot into liquid metal;
and 2, step: putting the liquid metal into a vacuum box of a pulping machine, stirring in a vacuum state, setting the stirring speed, and making the liquid metal into semi-solid metal slurry when the temperature in the vacuum box reaches a set second temperature;
and step 3: putting the semi-solid metal slurry into an inlet of a pressure chamber of a die casting machine;
and 4, step 4: and (4) operating the die casting machine, and forming the semi-solid metal slurry in a die casting die cavity.
3. A method for die-casting semi-solid metal slurry according to claim 2, wherein in step 1, the metal ingot is an aluminum ingot, the aluminum ingot is placed in a melting furnace, the first temperature is 660 ± 30 ℃, and the aluminum ingot is melted into liquid aluminum;
in the step 2, the vacuum state in the vacuum box is more than 60%, the stirring speed is 1000 +/-100 revolutions per minute, and the second temperature is 600 +/-15 ℃, so that the liquid aluminum becomes semi-solid slurry.
4. A method for die-casting semi-solid metal slurry according to claim 2 or 3, wherein in the step 2 and the step 3, liquid aluminum is scooped out of the melting furnace by a feeding machine and is fed into a vacuum box of the pulper;
in the step 4, an injection rod of the die casting machine is started, the semi-solid slurry is injected into a die cavity from a pressure chamber for forming, the injection rod is started for pressurization for 4 +/-2 seconds, pressure is maintained for 4 +/-2 seconds, and cooling forming is carried out; the injection pressure is 50 +/-20 MPa, and the injection speed is 3 +/-1 m/s.
5. The utility model provides a pulping machine, its characterized in that, pulping machine includes the vacuum chamber, and this vacuum chamber is covered on this and is connected with evacuating device and agitating unit including closing together upper cover and the box that forms airtight space, should cover on this and be connected with the actuating mechanism that can order about this box and move the upper cover relatively, the box sets up in the upper cover below.
6. The pulper of claim 5, further comprising a machine table, wherein a lifting platform is movably disposed on the machine table, and the upper cover is fixedly disposed on a lower surface of the lifting platform.
7. The pulper according to claim 6, characterized in that said stirring means comprises a stirring motor and a stirring rod, said stirring rod being fixedly connected to the output of said stirring motor, said stirring motor being arranged on a lifting platform, said stirring rod extending into said upper cover.
8. A pulper according to claim 6, wherein said evacuating means comprises an evacuation nozzle secured to said lifting platform, the end of said evacuation nozzle extending into said cover.
9. The pulper of claim 6, wherein said drive mechanism comprises a lead screw driven by a drive motor to rotate, said lead screw is disposed on the machine platform, a lead screw nut is sleeved on said lead screw, said lead screw nut is fixed on a movable bracket, and said movable bracket is connected with said lifting platform.
10. The utility model provides a semi-solid metal thick liquids die-casting forming system, its characterized in that, it includes die casting machine, smelting pot, gives hot water machine, sprayer, reclaimer and claim 5 pulper, this pulper sets up in the portion one side of penetrating of this die casting machine, and this smelting pot sets up in the pulper right side, set up in the right side of smelting pot for hot water machine, the spoon of giving hot water machine corresponds the pressure chamber setting of pulper, smelting pot and die casting machine, and this sprayer sets up in the die casting machine top, and this reclaimer sets up in the opposite side at the portion of penetrating of this die casting machine.
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| CN202110946236.4A CN115707539A (en) | 2021-08-18 | 2021-08-18 | Method, pulping machine and system for semi-solid metal slurry die-casting molding |
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| CN202110946236.4A CN115707539A (en) | 2021-08-18 | 2021-08-18 | Method, pulping machine and system for semi-solid metal slurry die-casting molding |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117600436A (en) * | 2023-11-29 | 2024-02-27 | 南京航空航天大学 | Energy-saving continuous vacuum casting forming method and equipment for semi-solid slurry |
| CN117884603A (en) * | 2024-03-18 | 2024-04-16 | 北京航空航天大学 | Vacuum pressure-regulating casting method for aluminum-based composite brake disc |
| CN117600436B (en) * | 2023-11-29 | 2024-06-11 | 南京航空航天大学 | Energy-saving continuous vacuum casting forming method and equipment for semi-solid slurry |
-
2021
- 2021-08-18 CN CN202110946236.4A patent/CN115707539A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117600436A (en) * | 2023-11-29 | 2024-02-27 | 南京航空航天大学 | Energy-saving continuous vacuum casting forming method and equipment for semi-solid slurry |
| CN117600436B (en) * | 2023-11-29 | 2024-06-11 | 南京航空航天大学 | Energy-saving continuous vacuum casting forming method and equipment for semi-solid slurry |
| CN117884603A (en) * | 2024-03-18 | 2024-04-16 | 北京航空航天大学 | Vacuum pressure-regulating casting method for aluminum-based composite brake disc |
| CN117884603B (en) * | 2024-03-18 | 2024-05-28 | 北京航空航天大学 | Vacuum pressure-regulating casting method for aluminum-based composite brake disc |
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