CN114273632B - Liquid-cooled aluminum alloy semi-solid pulping process - Google Patents
Liquid-cooled aluminum alloy semi-solid pulping process Download PDFInfo
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- CN114273632B CN114273632B CN202111542842.6A CN202111542842A CN114273632B CN 114273632 B CN114273632 B CN 114273632B CN 202111542842 A CN202111542842 A CN 202111542842A CN 114273632 B CN114273632 B CN 114273632B
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Abstract
The invention discloses a liquid-cooled aluminum alloy semi-solid pulping process, which comprises the following steps: (1) the manipulator drives the container to scoop molten aluminum liquid from the aluminum liquid tank, and moves the container to the lower part of the stirring device, and the lower part of the stirring device is immersed into the aluminum liquid of the container; (2) the stirring device comprises a stirring shaft which can rotate around a vertical axis; a flow inlet pipe and a return pipe are arranged in the stirring shaft, and the flow inlet pipe is communicated with the lower part of the return pipe; while the stirring shaft rotates, cooling liquid flows through the inflow pipe and the return pipe; (3) after stirring for a set time, stopping rotation of the stirring shaft; the mechanical arm drives the container to descend so as to separate the stirring device from the container. Compared with the prior art, the stirring shaft is provided with the cooling liquid for cooling, so that dendrite formation is promoted, and the formed dendrite is scattered by the stirring shaft for uniform dispersion, so that the pulping efficiency of the aluminum alloy melt is greatly improved.
Description
Technical Field
The invention relates to the technical field of preparation of aluminum alloy semi-solid slurry, in particular to a liquid-cooled aluminum alloy semi-solid slurry preparation process.
Background
The semi-solid forming technology of aluminum alloy comprises two major types of rheoforming and thixotropic forming, wherein semi-solid metal blanks used for the thixotropic forming have higher solid phase fraction, are convenient to convey and heat, and are easy to realize automatic operation, so that the industrial application of the early semi-solid forming technology is mainly concentrated on the thixotropic forming technology; with the application and popularization of the thixotropic molding technology, the equipment cost is high, the processing excess materials cannot be recovered rapidly, the surface of the blank is oxidized due to secondary remelting, the production period is long, and the development of the thixotropic molding technology is restricted due to high energy consumption; therefore, the rheoforming technology has become a research hot spot in the field of semi-solid forming of aluminum alloys in recent years; the rheologic forming technology is to control the quality of slurry in the temperature range of alloy from liquid state to preset semi-solid state, so that semi-solid slurry with high quality is prepared in short time by proper technological means and the fast connection between semi-solid slurry and rheologic forming becomes key of rheologic forming technology.
The preparation process of the aluminum alloy semi-solid slurry is divided into two types, wherein one type is that the melt is stirred by an external action field, and the other type is that the melt does not need to be stirred by the external action field; the former method is to apply strong stirring by using an external field in the alloy solidification process, convection caused by stirring inhibits dendrite growth, and dendrite finally evolves into a sphere or a nearly sphere under the conditions of higher stirring shear rate and lower cooling rate, such as a mechanical stirring method, an electromagnetic stirring method and an ultrasonic vibration method; the traditional stirring mode is to make the nucleation and growth mode of the primary solid phase change or break the dendrite formed fully through the high-speed rotation of the stirring shaft in the aluminum alloy melt. But such pulping is less efficient.
Another technique is to prepare semi-solid slurry by controlling internal factors such as temperature, alloying elements, nucleation and the like, such as a low superheat pouring method, a chemical grain refining method, a nucleation control method and a strain-induced melt activation method; however, this method has a disadvantage in that it requires precise control of external conditions such as temperature, composition, etc.
In view of this, the applicant has made intensive studies on the above-mentioned defects in the prior art.
Disclosure of Invention
The invention mainly aims to provide a liquid-cooled aluminum alloy semi-solid pulping process which has the characteristic of high pulping efficiency.
In order to achieve the above object, the solution of the present invention is:
a liquid-cooled aluminum alloy semi-solid pulping process comprises the following steps:
(1) the manipulator drives the container to scoop molten aluminum liquid from the aluminum liquid tank, and moves the container to the lower part of the stirring device, and the lower part of the stirring device is immersed into the aluminum liquid of the container;
(2) the stirring device comprises a stirring shaft which can rotate around a vertical axis; a flow inlet pipe and a return pipe are arranged in the stirring shaft, and the flow inlet pipe is communicated with the lower part of the return pipe; while the stirring shaft rotates, cooling liquid flows through the inflow pipe and the return pipe;
(3) after stirring for a set time, stopping rotation of the stirring shaft; the mechanical arm drives the container to descend so as to separate the stirring device from the container.
Further, the upper end of the stirring shaft is connected with a liquid supply device for supplying cooling liquid, and the liquid supply device comprises a shell, a storage box, a conveying pump, a power supply storage battery and a balancing and adjusting mechanism; the shell is fixedly connected with the upper end of the stirring shaft; the storage box is arranged at the top of the inner cavity of the shell, cooling liquid is filled in the storage box, the delivery pump is arranged at the lower part of the storage box, and the storage box is connected with an inlet of the delivery pump; the outlet of the delivery pump is connected with the inflow pipe of the stirring shaft through a pipeline; the return pipe of the stirring shaft is connected with the storage box through a pipeline; the power supply storage battery is arranged on the inner wall of the shell and supplies power to the conveying pump through a wire; the balancing adjusting mechanism is arranged at the bottom of the inner cavity of the shell and comprises a fixed seat, an adjusting screw rod and a balancing weight, the fixed seat is fixedly connected with the inner wall of the shell, the adjusting screw rod is rotationally connected with the fixed seat, a threaded hole is formed in the balancing weight, the adjusting screw rod is in threaded connection with the threaded hole, and the balancing weight is in sliding connection with the bottom surface of the inner cavity of the shell; the length direction of the adjusting screw rod is perpendicular to the rotation axis of the stirring shaft and penetrates through the rotation axis of the stirring shaft; one end of the adjusting screw rod is located outside the shell, and an adjusting hand wheel is fixedly arranged at one end of the adjusting screw rod located outside the shell.
Further, a refrigerating sheet is arranged in the storage box and connected with the power supply storage battery through a wire.
Further, a first storage battery and a second storage battery are arranged in the shell, the quality and the electricity storage capacity of the first storage battery are larger than those of the second storage battery, a first refrigerating sheet and a second refrigerating sheet are arranged in the storage box, and the first storage battery is connected with the conveying pump and the first refrigerating sheet through wires; the second storage battery is connected with the second refrigerating sheet through a wire; the first storage battery and the second storage battery are respectively positioned at two sides of the inner cavity of the shell and are spaced 180 degrees relative to the rotation axis of the stirring shaft; the balancing and adjusting mechanism is positioned below the second storage battery.
Further, the leveling operation is further included before the step (1), the stirring shaft is rotated, the conveying pump is started, the adjusting hand wheel is rotated according to the shaking condition of the stirring shaft to adjust the position of the balancing weight until the stirring shaft is rotated stably; after a period of use, the residual aluminum liquid on the stirring shaft is cleaned regularly and leveling operation is carried out again.
Further, a supporting ring for supporting the stirring shaft is arranged on the stirring shaft, the stirring shaft is rotationally connected with the supporting ring, and a power mechanism for driving the stirring shaft to rotate is further arranged on the stirring shaft.
Further, a stirring rod extending in the radial direction is formed on the stirring shaft.
Further, in the step (3), after the stirring shaft stops rotating, the conveying pump still works for a period of time.
Further, the stirring device also comprises an auxiliary stirring mechanism, wherein the auxiliary stirring mechanism comprises a square fixing frame, a stainless steel thin-wall cylinder, a first sliding limiting rod, a second sliding limiting rod, a third sliding limiting rod, four driving rods and a driving mechanism; the section of the stainless steel thin-wall cylinder in the free state is circular, a plurality of through holes are distributed on the stainless steel thin-wall cylinder, a first sliding limiting rod, a second sliding limiting rod and a third sliding limiting rod are respectively connected to the outer wall of the stainless steel thin-wall cylinder, the second sliding limiting rod, the first sliding limiting rod and the third sliding limiting rod form an included angle of 90 degrees, and the first sliding limiting rod and the third sliding limiting rod are positioned on the same straight line position; the outer wall of the stainless steel thin-wall cylinder is also provided with a step seat, and the step seat is positioned on the outer wall of the stainless steel thin-wall cylinder at the opposite side of the second sliding limiting rod; the step seat, the first sliding limiting rod, the second sliding limiting rod and the third sliding limiting rod are positioned on the same horizontal plane, a driving rod is hinged between the adjacent limiting rods or between the limiting rods and the step seat, and four driving rods enclose a closed annular structure; the first sliding limiting rod, the second sliding limiting rod and the third sliding limiting rod are arranged on three sides of the square fixing frame in a sliding manner; the driving rod is connected with a driving mechanism for changing the angle of two adjacent driving rods; the stainless steel thin-wall cylinder circularly changes among a first circular state, a first elliptic state, a second circular state and a second elliptic state, the elliptic length of the first elliptic state is along the direction of the second sliding limiting rod, and the elliptic long axis direction of the second elliptic state is along the direction of the first sliding limiting rod.
Further, the step seat, the first sliding limiting rod, the second sliding limiting rod and the third sliding limiting rod are respectively provided with an auxiliary tension rod extending downwards, and the auxiliary tension rods are attached to the outer wall of the stainless steel thin-wall cylinder.
Further, swing rods are fixedly arranged on the two adjacent driving rods, a pivot hole is formed in one end, away from the driving rods, of each swing rod, and movable rods of the two electric push rods with the tail parts connected with each other are respectively hinged with the pivot holes of the two swing rods; the two electric push rods are simultaneously extended or simultaneously retracted to change the angle between the two swing rods.
Further, the driving mechanism comprises a mounting base, a turntable, a sliding block, a sliding rail, a connecting rod and a transmission rod, and the mounting base is fixedly connected with the square fixing frame; the rotary table is rotationally connected to the mounting base, the sliding rail is fixedly arranged on the mounting base, the length direction of the sliding rail is along the sliding direction of the second sliding limiting rod, the sliding block is slidingly arranged at the edge of the rotary table and rotationally connected with the connecting rod, one end of the connecting rod, which is far away from the rotary table, is rotationally connected with the sliding block, along with the rotation of the rotary table, the sliding block slides back and forth on the sliding rail, the sliding block is connected with the transmission rod, and the transmission rod is rotationally connected with the junction of one end of the sliding block and the two driving rods above the step seat.
After the structure is adopted, the liquid-cooled aluminum alloy semi-solid pulping process has at least the following beneficial effects:
1. through setting up into flow tube and back flow in the (mixing) shaft for when the (mixing) shaft rotates and stirs, let in coolant liquid in flow tube and the back flow, thereby coolant liquid absorbs heat and takes away the formation of some heat in promoting the aluminium liquid around the (mixing) shaft, the dendrite that forms is broken up by the (mixing) shaft promptly after producing, thereby evenly distributed accomplishes slurrying in the aluminium liquid. Compared with the traditional pulping method by stirring through a stirring shaft, the invention promotes the formation of dendrites, can timely break up dendrites to uniformly distribute dendrites, and improves the pulping efficiency.
2. Because the stirring shaft needs to rotate, and meanwhile, the cooling liquid needs to be conveyed into the inflow pipe and withdrawn from the return pipe, and the liquid supply device is arranged at the upper end of the stirring shaft and rotates along with the stirring shaft, the complexity of pipeline design is reduced. When the cooling device is used, the delivery pump pumps cooling liquid in the storage box and delivers the cooling liquid to the inlet of the inflow pipe through the pipeline, and the delivery pump is arranged at the lower part of the storage box, so that even if the storage box is rotating, the delivery pump can still smoothly absorb the cooling liquid due to the fact that the inlet of the delivery pump is connected with the lower bottom of the storage box.
3. Through carrying out the trimming and adjusting operation to (mixing) shaft and liquid supply device before formally using, when rotating adjusting screw, can adjust the distance of balancing weight apart from (mixing) shaft axis of rotation for (mixing) shaft and liquid supply device are as holistic focus in the axis of rotation of (mixing) shaft, thereby more steady balance when (mixing) shaft rotates.
4. Through setting up the refrigeration piece in the storage tank for the coolant liquid after the intensification can cool down, keeps the coolant liquid to keep in suitable operating temperature scope. The volume in the storage box and the amount of the cooling liquid in the storage box can be designed and adjusted according to the needs, so that the cooling effect of the cooling liquid is guaranteed.
5. The support ring on the stirring shaft is rotationally connected with the stirring shaft, the support ring is fixedly arranged on the frame, and the frame is fixedly provided with rotation power for driving the stirring shaft. After the stirring shaft stops rotating, the conveying pump keeps working, so that the phenomenon that the temperature of the cooling liquid is too high due to the fact that liquid remained in the flow inlet pipe and the return pipe keeps long-term contact with the stirring shaft is avoided.
6. Through setting up auxiliary stirring device, four actuating levers are articulated each other in proper order, and four pin joints constitute four summit of rhombus, through the angle that changes two adjacent actuating levers to make stainless steel thin wall section of thick bamboo alternate each other between ellipse and circular. Because the stainless steel thin-wall cylinder is immersed into the aluminum liquid, the aluminum liquid in the container far away from the center of the container is disturbed in the process of changing the shape of the stainless steel thin-wall cylinder, so that the aluminum liquid can be fully sheared by the stirring shaft, and scattered dendrites are improved to be uniformly dispersed. By arranging the auxiliary tension rod, the stainless steel thin-wall cylinder in the height direction is synchronously deformed along the radial direction.
Compared with the prior art, the stirring shaft is provided with the cooling liquid for cooling, so that dendrite formation is promoted, and the formed dendrite is scattered by the stirring shaft for uniform dispersion, so that the pulping efficiency of the aluminum alloy melt is greatly improved.
Drawings
Fig. 1 is a state diagram of the use of the liquid-cooled aluminum alloy semi-solid pulping process according to the present invention.
FIG. 2 is a schematic cross-sectional view of the stirring device extending into the container.
Fig. 3 is a schematic cross-sectional structure of the stirring shaft and the liquid supply device.
Fig. 4 is an enlarged schematic view of the structure at a in fig. 3.
Fig. 5 is a schematic diagram of an exploded structure of the auxiliary stirring mechanism (hidden square fixing frame).
Fig. 6 to 8 are schematic top view structures of the auxiliary stirring mechanism when the stainless steel thin-wall cylinder is in different states.
Fig. 9 is a schematic plan view of an auxiliary stirring mechanism according to a second embodiment of the driving mechanism.
Fig. 10 is an enlarged schematic view of the structure at B in fig. 9.
In the figure:
a container 100; a manipulator 1;
a stirring shaft 2; a flow inlet pipe 21; a return pipe 22; a support ring 23; a stirring rod 24;
a liquid supply device 3; a housing 31; a first battery 311; a second battery 312; a storage box 32; a first cooling sheet 321; a second cooling plate 322; a transfer pump 33; trim adjustment mechanism 34; a fixed seat 341; an adjusting screw 342; a balancing weight 343; an adjustment handwheel 344;
Detailed Description
In order to further explain the technical scheme of the invention, the invention is explained in detail by specific examples.
As shown in fig. 1 to 10, the present invention relates to a liquid-cooled aluminum alloy semi-solid pulping process, which comprises the following steps:
(1) the manipulator 1 drives the container 100 to scoop up molten aluminum liquid from the aluminum liquid tank, and moves the container 100 to the lower part of the stirring device, and the lower part of the stirring device is immersed into the aluminum liquid of the container 100;
(2) the stirring device comprises a stirring shaft 2, and the stirring shaft 2 can rotate around a vertical axis; a flow inlet pipe 21 and a return pipe 22 are arranged in the stirring shaft 2, and the flow inlet pipe 21 is communicated with the lower part of the return pipe 22; while the stirring shaft 2 rotates, cooling liquid flows through the inflow pipe 21 and the return pipe 22;
(3) after stirring for a set time, the stirring shaft 2 stops rotating; the robotic arm lowers the container to disengage the stirring device from the container 100.
In this way, according to the liquid-cooled aluminum alloy semi-solid pulping process, through the arrangement of the inflow pipe 21 and the return pipe 22 in the stirring shaft 2, when the stirring shaft 2 rotates to stir, cooling liquid is introduced into the inflow pipe 21 and the return pipe 22, and absorbs heat to take away part of heat so as to promote the formation of dendrites in the aluminum liquid around the stirring shaft 2, and the dendrites formed are scattered by the stirring shaft 2 after being generated, so that the dendrites are uniformly distributed in the aluminum liquid to complete pulping. Compared with the traditional pulping method by stirring only through the stirring shaft 2, the invention promotes the formation of dendrites, can timely break up dendrites to uniformly distribute dendrites, and improves the pulping efficiency.
Further, the upper end of the stirring shaft 2 is connected with a liquid supply device 3 for supplying cooling liquid, and the liquid supply device 3 comprises a shell 31, a storage box 32, a delivery pump 33, a power supply storage battery and a balancing adjustment mechanism 34; the shell 31 is fixedly connected with the upper end of the stirring shaft 2; the storage tank 32 is arranged at the top of the inner cavity of the shell 31, the cooling liquid is filled in the storage tank 32, the delivery pump 33 is arranged at the lower part of the storage tank 32, and the storage tank 32 is connected with the inlet of the delivery pump 33; the outlet of the conveying pump 33 is connected with the inflow pipe 21 of the stirring shaft 2 through a pipeline; the return pipe 22 of the stirring shaft 2 is connected with the storage tank 32 through a pipeline; the power supply storage battery is arranged on the inner wall of the shell 31 and supplies power to the conveying pump 33 through a wire; since the stirring shaft 2 needs to rotate, and meanwhile, cooling liquid needs to be conveyed into the inflow pipe 21 and withdrawn from the return pipe 22, the complexity of pipeline design is reduced by arranging the liquid supply device 3 at the upper end of the stirring shaft 2 and rotating along with the stirring shaft 2; the traditional way is through setting up the feed mechanism that has annular runner, can both guarantee the smooth and easy flow of coolant liquid when guaranteeing the (mixing) shaft rotation, avoids the pipeline to tie a knot because the rotation of (mixing) shaft simultaneously, but this kind of structure is more complicated. In use, the delivery pump 33 pumps the coolant in the storage tank 32 and delivers the coolant to the inlet of the inflow pipe 21 through a pipe, and the delivery pump 33 is disposed at the lower portion of the storage tank 32 such that even if the storage tank 32 is rotating, the delivery pump 33 can maintain smooth suction of the coolant because the inlet of the delivery pump 33 is connected to the lower bottom portion of the storage tank 32.
The balancing adjustment mechanism 34 is disposed at the bottom of the inner cavity of the housing 31, the balancing adjustment mechanism 34 includes a fixed seat 341, an adjusting screw 342, and a balancing weight 343, the fixed seat 341 is fixedly connected with the inner wall of the housing 31, the adjusting screw 342 is rotationally connected with the fixed seat 341, a threaded hole is formed on the balancing weight 343, the adjusting screw 342 is in threaded connection with the threaded hole, and the balancing weight 343 is slidably connected with the bottom surface of the inner cavity of the housing 31; the length direction of the adjusting screw rod 342 is perpendicular to the rotation axis of the stirring shaft 2 and passes through the rotation axis of the stirring shaft 2; one end of the adjusting screw rod 342 is located outside the housing 31, and an adjusting hand wheel 344 is fixedly arranged on one end of the adjusting screw rod 342 located outside the housing 31. Through carrying out trimming adjustment operation to (mixing) shaft 2 and feed liquor device 3 before formally using, when rotating accommodate screw 342, can adjust balancing weight 343 is apart from (mixing) shaft 2 axis of rotation's distance for (mixing) shaft 2 and feed liquor device 3 are as holistic focus on (mixing) shaft 2 axis of rotation, thereby axis of rotation 2 rotates more steadily balanced. Because the adjusting handwheel 344 is disposed outside the housing 31, rotational adjustment by a user can be facilitated.
Preferably, a refrigerating sheet is disposed in the storage box 32, and the refrigerating sheet is connected with the power supply battery through a wire. By providing the cooling fin in the storage tank 32, the warmed coolant can be cooled, keeping the coolant within a suitable operating temperature range. The volume in the storage tank 32 and the amount of the cooling liquid contained in the storage tank 32 can be designed and adjusted as required, thereby ensuring the cooling effect of the cooling liquid.
Preferably, a first battery 311 and a second battery 312 are disposed in the housing 31, the mass and the electricity storage capacity of the first battery 311 are greater than those of the second battery 312, a first refrigeration sheet 321 and a second refrigeration sheet 322 are disposed in the storage box 32, and the first battery 311 is connected with the conveying pump 33 and the first refrigeration sheet 321 through wires; the second battery 312 is connected with the second refrigerating piece 322 through a wire; the first storage battery 311 and the second storage battery 312 are respectively positioned at two sides of the inner cavity of the shell 31 and are spaced 180 degrees relative to the rotation axis of the stirring shaft 2; the trim adjustment mechanism 34 is located below the second battery 312. The weight of the first battery 311 is different from the weight of the second battery 312, the balancing adjustment mechanism 34 and the second battery 312 are located at the same side, the first battery 311 is located at the other side, thus the dead weight of the first battery 311 is approximately equal to the dead weight of the second battery 312 and the balancing adjustment mechanism 34, so that the two sides are approximately balanced, and the trimming is performed by changing the position of the balancing weight 343.
Preferably, the step (1) further comprises leveling operation, rotating the stirring shaft 2 and starting the conveying pump 33, and rotating the adjusting hand wheel 344 to adjust the position of the balancing weight 343 according to the shaking condition of the stirring shaft 2 until the stirring shaft 2 rotates steadily; after a period of use, the residual aluminum liquid on the stirring shaft 2 is cleaned regularly and the leveling operation is carried out again. Thus, the balance of the stirring shaft 2 in long-term use is maintained, and the resistance and the energy consumption of the stirring shaft 2 are reduced.
Preferably, the stirring shaft 2 is provided with a supporting ring 23 for supporting the stirring shaft 2, the stirring shaft 2 is rotatably connected with the supporting ring 23, and the stirring shaft 2 is further provided with a power mechanism (not shown in the figure) for driving the stirring shaft 2 to rotate, and the power mechanism can be in a common driving form that a motor drives the stirring shaft 2 to rotate. The support ring 23 on the stirring shaft 2 is rotationally connected with the stirring shaft 2, the support ring 23 is fixedly arranged on a frame, and the frame is fixedly provided with rotation power for driving the stirring shaft 2.
Preferably, the stirring shaft 2 is formed with a stirring rod 24 extending in a radial direction. By providing the stirring rod 24, the shearing effect of the stirring shaft 2 is increased, so that the dendrites formed are better broken up.
Preferably, in step (3), the transfer pump 33 is still operated for a while after the stirring shaft 2 stops rotating. After the stirring shaft 2 stops rotating, the delivery pump 33 keeps working, so that the situation that the temperature of the cooling liquid is too high due to the fact that the liquid remained in the flow pipe 21 and the return pipe 22 keeps in long-term contact with the stirring shaft 2 is avoided.
Preferably, the stirring device further comprises an auxiliary stirring mechanism, wherein the auxiliary stirring mechanism comprises a square fixing frame 41, a stainless steel thin-wall cylinder 42, a first sliding limiting rod 431, a second sliding limiting rod 432, a third sliding limiting rod 433, four driving rods 44 and a driving mechanism 46; the square fixing frame 41 is also fixed on a frame (not shown in the figure); the section of the stainless steel thin-wall cylinder 42 in a free state is circular, a plurality of through holes 421 are distributed on the stainless steel thin-wall cylinder 42, the through holes 421 are used for aluminum liquid to pass through, a first sliding limiting rod 431, a second sliding limiting rod 432 and a third sliding limiting rod 433 are respectively connected to the outer wall of the stainless steel thin-wall cylinder 42, the second sliding limiting rod 432 forms an included angle of 90 degrees with the first sliding limiting rod 431 and the third sliding limiting rod 433, and the first sliding limiting rod 431 and the third sliding limiting rod 433 are positioned on the same straight line position; the outer wall of the stainless steel thin-wall cylinder 42 is also provided with a step seat 434, and the step seat 434 is positioned on the outer wall of the stainless steel thin-wall cylinder 42 at the opposite side of the second sliding limiting rod 432; the step seat 434, the first sliding limiting rod 431, the second sliding limiting rod 432 and the third sliding limiting rod 433 are positioned on the same horizontal plane, a driving rod 44 is hinged between the adjacent limiting rods or between the limiting rods and the step seat 434, and four driving rods 44 enclose a closed annular structure; the first sliding limiting rod 431, the second sliding limiting rod 432 and the third sliding limiting rod 433 are slidably disposed on three sides of the square fixing frame 41; the driving rod 44 is connected with a driving mechanism 46 for changing the angle of two adjacent driving rods 44; the stainless steel thin-wall cylinder 42 circularly changes among a first circular state, a first elliptical state, a second circular state and a second elliptical state, wherein the elliptical length of the first elliptical state is along the direction of the second sliding limiting rod 432, and the elliptical long axis direction of the second elliptical state is along the direction of the first sliding limiting rod 431.
Preferably, the distance between two hinge points of each driving rod 44 is equal, each driving rod is arc-shaped, and the corresponding central angle is 90 degrees; by arranging the auxiliary stirring device, the four driving rods 44 are sequentially hinged with each other, four hinge points form four vertexes of a diamond, and the angle of two adjacent driving rods 44 is changed, so that the stainless steel thin-wall cylinder 42 is mutually converted between an ellipse and a circle. Because the stainless steel thin-wall cylinder 42 is immersed into the aluminum liquid, the aluminum liquid in the container 100 far away from the center of the container 100 is disturbed in the shape change process of the stainless steel thin-wall cylinder 42, so that the aluminum liquid can be sufficiently sheared by the stirring shaft 2, and scattered dendrites can be uniformly dispersed.
Preferably, the thickness of the stainless steel thin-wall cylinder 42 is 0.5-1.5mm, preferably 0.5mm or 0.8mm or 1mm or 1.5mm, and the stainless steel thin-wall cylinder 42 is made of a stainless steel material which has good toughness, is easy to rebound after bending and is not easy to break, such as a stainless steel material similar to a band saw. The diameter of the round shape formed by the stainless steel thin-wall cylinder 42 in the free state is 150-200mm, preferably 180mm, and the stainless steel thin-wall cylinder 42 with large diameter can set the thickness of the stainless steel thin-wall cylinder 42 to be thicker, so that the strength in the reciprocating deformation process is ensured. The height of the stainless steel thin-walled cylinder 42 in the vertical direction is not more than 300mm, preferably 180-200mm, for example 180mm in diameter and height.
Preferably, the step seat 434, the first sliding limiting rod 431, the second sliding limiting rod 432 and the third sliding limiting rod 433 are respectively formed with an auxiliary tension rod 45 extending downward, and the auxiliary tension rods 45 are attached to the outer wall of the stainless steel thin-walled cylinder 42. By providing the auxiliary tension rod 45, the stainless steel thin-wall cylinder 42 in the height direction is deformed in the radial direction while being kept synchronous.
As a first embodiment of the driving mechanism 46, preferably, two adjacent driving rods 44 are fixedly provided with swinging rods 461, one end of each swinging rod 461 far away from the driving rod 44 is provided with a pivot hole 462, and movable rods of two electric push rods 463 with tail parts connected with each other are respectively hinged with the pivot holes 462 of the two swinging rods 461; the two electric push rods 463 are simultaneously extended or simultaneously retracted to change the angle between the two swing rods 461.
As a second embodiment of the driving mechanism 46, as shown in fig. 9 and 10, the driving mechanism 46 includes a mounting base 464, a turntable 465, a slider 466, a slide rail 467, a link 468 and a transmission rod 469, and the mounting base 464 is fixedly connected with the square fixing frame 41; the carousel 465 rotates to be connected on the installation base 464, slide rail 467 is fixed to be set up on the installation base 464, slide rail 467's length direction is along the slip direction of second slip gag lever post 432, slider 466 slides and sets up carousel 465 edge rotation is connected with connecting rod 468, the one end that carousel 465 was kept away from to connecting rod 468 with slider 466 rotates to be connected, along with the rotation of carousel 465, for example motor drive carousel 465 rotates, slider 466 slides reciprocally on slide rail 467, be connected with transfer line 469 on the slider 466, transfer line 469 keeps away from the junction rotation of two actuating levers 44 above the step seat 434 of one end of slider 466 is connected. The sliding block 466 which moves reciprocally on the sliding rail 467 moves the transmission rod 469 so as to change the angle between the driving rods 44, and the stainless steel thin-walled cylinder 42 reciprocally changes between oval-round-oval so as to disturb the molten aluminum near the inner wall portion of the container.
Compared with the prior art, the stirring shaft 2 is provided with the cooling liquid for cooling, so that dendrite formation is promoted, and the formed dendrite is scattered by the stirring shaft 2 for uniform dispersion, so that the pulping efficiency of the aluminum alloy melt is greatly improved.
The above examples and drawings are not intended to limit the form or form of the present invention, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present invention.
Claims (9)
1. The semi-solid pulping process for the liquid-cooled aluminum alloy is characterized by comprising the following steps of:
(1) the manipulator drives the container to scoop molten aluminum liquid from the aluminum liquid tank, and moves the container to the lower part of the stirring device, and the lower part of the stirring device is immersed into the aluminum liquid of the container;
(2) the stirring device comprises a stirring shaft which can rotate around a vertical axis; a flow inlet pipe and a return pipe are arranged in the stirring shaft, and the flow inlet pipe is communicated with the lower part of the return pipe; while the stirring shaft rotates, cooling liquid flows through the inflow pipe and the return pipe;
(3) after stirring for a set time, stopping rotation of the stirring shaft; the mechanical arm drives the container to descend so as to separate the stirring device from the container;
the upper end of the stirring shaft is connected with a liquid supply device for supplying cooling liquid, and the liquid supply device comprises a shell, a storage box, a conveying pump, a power supply storage battery and a balancing and adjusting mechanism; the shell is fixedly connected with the upper end of the stirring shaft; the storage box is arranged at the top of the inner cavity of the shell, cooling liquid is filled in the storage box, the delivery pump is arranged at the lower part of the storage box, and the storage box is connected with an inlet of the delivery pump; the outlet of the delivery pump is connected with the inflow pipe of the stirring shaft through a pipeline; the return pipe of the stirring shaft is connected with the storage box through a pipeline; the power supply storage battery is arranged on the inner wall of the shell and supplies power to the conveying pump through a wire; the balancing adjusting mechanism is arranged at the bottom of the inner cavity of the shell and comprises a fixed seat, an adjusting screw rod and a balancing weight, the fixed seat is fixedly connected with the inner wall of the shell, the adjusting screw rod is rotationally connected with the fixed seat, a threaded hole is formed in the balancing weight, the adjusting screw rod is in threaded connection with the threaded hole, and the balancing weight is in sliding connection with the bottom surface of the inner cavity of the shell; the length direction of the adjusting screw rod is perpendicular to the rotation axis of the stirring shaft and penetrates through the rotation axis of the stirring shaft; one end of the adjusting screw rod is located outside the shell, and an adjusting hand wheel is fixedly arranged at one end of the adjusting screw rod located outside the shell.
2. The liquid-cooled aluminum alloy semi-solid pulping process of claim 1, wherein a refrigerating sheet is arranged in the storage box and is connected with the power supply storage battery through a wire.
3. The liquid-cooled aluminum alloy semi-solid pulping process of claim 2, wherein a first storage battery and a second storage battery are arranged in the shell, the mass and the electricity storage capacity of the first storage battery are larger than those of the second storage battery, a first refrigerating sheet and a second refrigerating sheet are arranged in the storage box, and the first storage battery is connected with the conveying pump and the first refrigerating sheet through wires; the second storage battery is connected with the second refrigerating sheet through a wire; the first storage battery and the second storage battery are respectively positioned at two sides of the inner cavity of the shell and are spaced 180 degrees relative to the rotation axis of the stirring shaft; the balancing and adjusting mechanism is positioned below the second storage battery.
4. The liquid-cooled aluminum alloy semi-solid pulping process of claim 1, wherein the process (1) further comprises leveling operation, rotating the stirring shaft and starting a conveying pump, and rotating an adjusting hand wheel to adjust the position of the balancing weight according to the shaking condition of the stirring shaft until the stirring shaft rotates stably; after a period of use, the residual aluminum liquid on the stirring shaft is cleaned regularly and leveling operation is carried out again.
5. The liquid-cooled aluminum alloy semi-solid pulping process of claim 1, wherein a support ring for supporting the stirring shaft is arranged on the stirring shaft, the stirring shaft is rotationally connected with the support ring, and a power mechanism for driving the stirring shaft to rotate is further arranged on the stirring shaft.
6. A liquid-cooled aluminum alloy semi-solid pulping process as claimed in claim 1, wherein the stirring shaft is formed with a stirring rod extending in a radial direction.
7. The process of claim 1, wherein the transfer pump is operated for a while after the stirring shaft stops rotating in step (3).
8. The liquid-cooled aluminum alloy semi-solid pulping process of claim 1, wherein the stirring device further comprises an auxiliary stirring mechanism, wherein the auxiliary stirring mechanism comprises a square fixing frame, a stainless steel thin-wall cylinder, a first sliding limiting rod, a second sliding limiting rod, a third sliding limiting rod, four driving rods and a driving mechanism; the section of the stainless steel thin-wall cylinder in the free state is circular, a plurality of through holes are distributed on the stainless steel thin-wall cylinder, a first sliding limiting rod, a second sliding limiting rod and a third sliding limiting rod are respectively connected to the outer wall of the stainless steel thin-wall cylinder, the second sliding limiting rod, the first sliding limiting rod and the third sliding limiting rod form an included angle of 90 degrees, and the first sliding limiting rod and the third sliding limiting rod are positioned on the same straight line position; the outer wall of the stainless steel thin-wall cylinder is also provided with a step seat, and the step seat is positioned on the outer wall of the stainless steel thin-wall cylinder at the opposite side of the second sliding limiting rod; the step seat, the first sliding limiting rod, the second sliding limiting rod and the third sliding limiting rod are positioned on the same horizontal plane, a driving rod is hinged between the adjacent limiting rods or between the limiting rods and the step seat, and four driving rods enclose a closed annular structure; the first sliding limiting rod, the second sliding limiting rod and the third sliding limiting rod are arranged on three sides of the square fixing frame in a sliding manner; the driving rod is connected with a driving mechanism for changing the angle of two adjacent driving rods; the stainless steel thin-wall cylinder circularly changes among a first circular state, a first elliptic state, a second circular state and a second elliptic state, the elliptic length of the first elliptic state is along the direction of the second sliding limiting rod, and the elliptic long axis direction of the second elliptic state is along the direction of the first sliding limiting rod.
9. The process for semi-solid pulping of liquid-cooled aluminum alloy according to claim 8, wherein the step seat, the first sliding limiting rod, the second sliding limiting rod and the third sliding limiting rod are respectively provided with an auxiliary stretching rod extending downwards, and the auxiliary stretching rods are attached to the outer wall of the stainless steel thin-wall cylinder.
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| US20100192727A1 (en) * | 2005-02-10 | 2010-08-05 | Graham Rex Withers | Apparatus and method for mixing, agitating and transporting molten or semi-solid metal-matrix composite materials |
| CN204122726U (en) * | 2014-09-18 | 2015-01-28 | 珠海市润星泰电器有限公司 | A kind of preparation facilities of easy metal semi-solid slurry |
| CN105855498A (en) * | 2015-01-21 | 2016-08-17 | 中兴通讯股份有限公司 | Semisolid metal slurry preparation device and method |
| CN104907527A (en) * | 2015-06-17 | 2015-09-16 | 深圳领威科技有限公司 | Semi-solid pulping equipment, semi-solid pulping system and semi-solid pulping method |
| KR20170023479A (en) * | 2015-08-24 | 2017-03-06 | 주식회사 에이스테크놀로지 | Stirrer for molten material |
| KR101811860B1 (en) * | 2016-05-17 | 2017-12-22 | (주)디티알 | Apparatus for producing semi-solid slurry and process for high pressure die casting |
| CN107377933A (en) * | 2017-08-28 | 2017-11-24 | 广东工业大学 | A kind of device and its implementation for preparing High Fraction Semi-solid Billets slurry |
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