CN113042709B - V-method sand burying mechanism for sand mold low-pressure casting of ultra-large aluminum alloy casting - Google Patents
V-method sand burying mechanism for sand mold low-pressure casting of ultra-large aluminum alloy casting Download PDFInfo
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- CN113042709B CN113042709B CN202110256712.XA CN202110256712A CN113042709B CN 113042709 B CN113042709 B CN 113042709B CN 202110256712 A CN202110256712 A CN 202110256712A CN 113042709 B CN113042709 B CN 113042709B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/01—Flasks; Accessories therefor for vacuum-sealed moulding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a V-method sand burying mechanism for sand mold low-pressure casting of ultra-large aluminum alloy castings, which comprises a negative pressure sand box and a sand box base, wherein the negative pressure sand box is arranged above the sand box base, two lower fixing plates are arranged on the sand box base, two upper fixing plates are arranged on the negative pressure sand box, the two lower fixing plates correspond to the two upper fixing plates one by one, and two guide rods are arranged on the upper fixing plates. The automatic spacing adjustment device for the negative pressure sand box has the advantages that the automatic spacing adjustment between the negative pressure sand box and the sand box base is met, the film can be conveniently laid on the follow-up sand box base, the film can be automatically laid on the negative pressure sand box and the sand box base, the laying structure and the sand burying mechanism are integrated, the sand burying mechanism is more convenient to transfer, hoisting equipment is not needed for transferring, the problem that the hoisting of the oversized sand box is difficult when the oversized sand box is fully loaded is solved, the investment of the hoisting equipment is greatly reduced, the bottom-dump type automatic sand unloading structural design is adopted, the flying dust is small during sand unloading, the environment is good, the labor intensity is low, and the risk of box collapse is avoided.
Description
Technical Field
The invention relates to the technical field of aluminum alloy casting, in particular to a V-method sand burying mechanism for sand mold low-pressure casting of ultra-large aluminum alloy castings.
Background
The aluminum alloy is a non-ferrous metal structural material which is most widely applied in industry, has the characteristics of low density, high strength, good plasticity, corrosion resistance, excellent electric and thermal conductivity and the like, plays an important role in the industries such as automobiles, molds, mechanical equipment, ships, aerospace, national defense and military industry and the like, and is one of the main structural materials for realizing industrial lightweight. At present, ultra-large aluminum alloy castings with high requirements on air tightness and mechanical properties, such as missile shells, unmanned wings and the like, are usually cast by adopting a resin sand and clay sand low-pressure pouring process, and compared with the traditional sand casting, the ultra-large aluminum alloy castings have the advantages of better casting quality, excellent air tightness and mechanical properties, low cost and short period compared with metal molds. However, the existing V-method sand burying structure cannot well meet the requirements of ultra-large castings in the processes of size, transportation, sand unloading and the like.
Disclosure of Invention
The invention aims to provide a V-method sand burying mechanism for sand mold low-pressure casting of an ultra-large aluminum alloy casting, which solves the following technical problems: (1) Starting an adjusting motor, driving a first lead screw to rotate by an output shaft of the adjusting motor, increasing the distance between a lower fixing plate and an upper fixing plate, further moving a negative pressure sand box and a sand box base in a reverse direction, starting a jacking cylinder in a lifting groove on the sand box base, further moving a film take-up and pay-off roller out of the lifting groove, starting a mounting motor, driving a film take-up and pay-off roller to rotate by an output shaft of the mounting motor, unwinding a PVC film by the film take-up and pay-off roller, starting a driving motor in a guide groove, driving a second lead screw to rotate by an output shaft of the driving motor, driving two adjusting sleeves to move oppositely by the second lead screw, and then driving a guide shell to move out of the guide groove by four hinge rods, the guide motor is started, an output shaft of the guide motor drives the belt pulleys to rotate, the belt pulleys drive the guide belts to rotate, the guide belts convey the PVC film, the PVC film is paved on the sand box base, the guide shell is retracted into the guide groove, the film retracting roller is retracted into the lifting groove, an output shaft of the adjusting motor rotates reversely, the negative pressure sand box is in contact with the sand box base, through the arrangement of the structure, automatic distance adjustment between the negative pressure sand box and the sand box base is met, further, the subsequent laying of the film on the sand box base is facilitated, the automatic laying of the film on the negative pressure sand box and the sand box base can be met, and the laying structure is integrated with the sand burying mechanism; (2) A sand mould shell is assembled and poured in a negative pressure sand box, then dry sand is filled in the negative pressure sand box and compacted, a jacking cylinder in a lifting groove on a top frame is opened, a PVC film is paved on the top frame, the negative pressure connecting pipe is used for vacuumizing, a vehicle body moves through the matching of a steel wheel set and a sliding groove, a lifting cylinder piston rod contracts after a liquid lifting pipe moves above a liquid lifting port, the steel wheel set is retracted into the vehicle body, the liquid lifting port is butted with the liquid lifting pipe, aluminum alloy liquid enters the liquid lifting pipe through the liquid lifting port and enters the negative pressure sand box through the liquid lifting pipe, the sand burying mechanism is more convenient to transfer, lifting equipment is not required to be adopted for transferring, the problem that the lifting is difficult when the oversized sand box is fully loaded is solved, and the investment of the lifting equipment is greatly reduced; (3) After the pouring is finished and the aluminum alloy casting is solidified and cooled, the automobile body is moved to a sand unloading station, negative pressure of a negative pressure sand box is relieved, a piston rod of an opening and closing air cylinder drives a cover plate to rotate, a sand unloading hole is opened, dry sand enters the sand unloading station through the sand unloading hole, a bottom-dump automatic sand unloading structural design is adopted, raised dust is small during sand unloading, the environment is good, the labor intensity is low, and the risk of box collapse is avoided.
The purpose of the invention can be realized by the following technical scheme:
a V-method sand burying mechanism for sand mold low-pressure casting of ultra-large aluminum alloy castings comprises a negative pressure sand box and a sand box base, wherein the negative pressure sand box is arranged above the sand box base, two lower fixing plates are arranged on the sand box base, two upper fixing plates are arranged on the negative pressure sand box, the two lower fixing plates correspond to the two upper fixing plates one by one, two guide rods are arranged on the upper fixing plates, and the two guide rods are connected with the lower fixing plates in a sliding manner;
the sand box base is arranged on a vehicle body, two grooves are formed in the vehicle body and correspond to two lower fixing plates one by one, the lower fixing plates are movably arranged in the grooves, four lifting cylinders are arranged on the vehicle body, and the end parts of piston rods of the lifting cylinders are connected with steel wheel sets;
the sand box base is provided with a plurality of sand unloading holes, the negative pressure sand box is provided with four negative pressure connecting pipes, the inner wall of the negative pressure sand box is provided with a plurality of negative pressure holes, the vehicle body is arranged above the pouring bottom plate, the sand box base is provided with a liquid lifting pipe, and the pouring bottom plate is provided with a liquid lifting port;
the utility model discloses a negative pressure sand box, including negative pressure sand box, roof frame, sand box base, driving motor output shaft, driving motor, drive belt, guide shell, lifting groove, film take-up and pay-off roller, two guide ways have all been seted up on roof frame, the sand box base, install driving motor in the guide way, driving motor output shaft second lead screw, second lead screw both ends helicoid is the symmetry setting along the middle part, two adjusting collars of second lead screw both ends threaded connection, rotate on the adjusting collar and install two hinge bars, four hinge bars all rotate and connect the direction shell, rotate on the direction shell and install guide belt.
Further, two bottom plates are symmetrically arranged on two sides of the sand box base, two upper fixing plates are symmetrically arranged on two sides of the negative pressure sand box, an adjusting motor is arranged on the upper fixing plates, an output shaft of the adjusting motor is connected with a first lead screw, the first lead screw is in threaded connection with the bottom plates, and through the arrangement of the structure, the automatic distance adjustment between the negative pressure sand box and the sand box base is met, so that the subsequent laying of films on the sand box base is facilitated.
Further, two recess symmetries are seted up in the automobile body both sides, and four lift cylinder symmetries are installed in the automobile body both sides, four guide arms are installed to lift cylinder bilateral symmetry, guide arm slidable mounting is on the automobile body, the steel wheel group is connected to the guide arm bottom, two spouts have been seted up on the pouring bottom plate, steel wheel group slidable mounting is on the spout, through the setting of above structure for should bury sand mechanism and shift more conveniently, need not to adopt hoisting apparatus to transport, solve the problem that the super large sand box lifted by crane the difficulty when full load, the investment of hoisting apparatus has significantly reduced.
Furthermore, a plurality of sand unloading holes are arranged on the sand box base in a rectangular array shape, a plurality of opening and closing cylinders are rotatably arranged at the bottom of the sand box base, cover plates are rotatably arranged at the end parts of piston rods of the opening and closing cylinders, the plurality of sand unloading holes are in one-to-one correspondence with the plurality of cover plates, the sand unloading holes and the cover plates are matched components, and a bottom-dump automatic sand unloading structural design is adopted, so that the sand unloading device has the advantages of small dust emission, good environment and low labor intensity, and avoids the risk of box collapse.
Furthermore, four negative pressure connecting pipes are symmetrically arranged on two sides of the negative pressure sand box, the plurality of negative pressure holes are arranged on the inner wall of the negative pressure sand box in a rectangular array shape, and the negative pressure vacuumizing efficiency of the sand burying mechanism is improved through the arrangement of the structure.
Furthermore, two inner crawling ladders are symmetrically installed on the inner walls of two sides of the negative pressure sand box, two outer crawling ladders are symmetrically installed on the outer walls of two sides of the negative pressure sand box, and through the arrangement of the structure, the negative pressure sand box is convenient for personnel to maintain and clean.
Furthermore, the liquid lifting pipe is arranged in the middle of the base of the sand box, the liquid lifting port is arranged in the middle of the pouring bottom plate, and the liquid lifting pipe and the liquid lifting port are matched components.
Further, be provided with two jacking cylinders in the lift tank, one of them jacking cylinder piston rod end connection lifter plate, another jacking cylinder piston rod end connection installation motor, installation motor output shaft film receive and releases the roller, the film receives and releases the roller and rotates and connect the lifter plate, through above structure setting, can satisfy and lay the film on negative pressure sand box and sand box base automatically, lay the structure and bury sand mechanism integration.
Further, two hinge bars rotate respectively and install in adjusting collar both sides, the direction shell internal rotation is provided with a plurality of belt pulleys, connects through direction belt transmission between a plurality of belt pulleys, the direction motor is installed to direction shell lateral wall, one of them belt pulley of direction motor output shaft, through above structure, supplementary transport to the film.
Further, the working process of the sand burying mechanism is as follows:
the method comprises the following steps: starting an adjusting motor, wherein an output shaft of the adjusting motor drives a first lead screw to rotate, the distance between a lower fixing plate and an upper fixing plate is increased, a negative pressure sand box and a sand box base reversely move, a jacking cylinder in a lifting groove on the sand box base is started, a film take-up and pay-off roller moves out of the lifting groove, a mounting motor is started, an output shaft of the mounting motor drives a film take-up and pay-off roller to rotate, a PVC film is unreeled by the film take-up and pay-off roller, a driving motor in a guide groove is started, a second lead screw is driven by the output shaft of the driving motor to rotate, the second lead screw drives two adjusting sleeves to move oppositely, then four hinge rods drive a guide shell to move out of the guide groove, a guide motor is started, an output shaft of the guide motor drives belt pulleys to rotate, a plurality of belt pulleys drive a guide belt to convey the PVC film, the PVC film is paved on the sand box base, then the guide shell is withdrawn into the guide groove, the film take-up and pay-off roller is withdrawn into the lifting groove, the output shaft of the adjusting motor reversely rotates, and the negative pressure sand box base is contacted with the sand box base;
step two: assembling and pouring a sand mold shell in a negative pressure sand box, filling dry sand into the negative pressure sand box, compacting, opening a jacking cylinder in a lifting groove on a top frame, paving a PVC film on the top frame, vacuumizing through a negative pressure connecting pipe, moving a vehicle body through the matching of a steel wheel set and a sliding groove, contracting a piston rod of the lifting cylinder after a liquid lifting pipe moves above a liquid lifting port, retracting the steel wheel set into the vehicle body, butting the liquid lifting port with the liquid lifting pipe, and allowing aluminum alloy liquid to enter the liquid lifting pipe through the liquid lifting port and enter the negative pressure sand box through the liquid lifting pipe;
step three: after the pouring is finished and the aluminum alloy casting is solidified and cooled, the vehicle body is moved to a sand unloading station, the negative pressure of the negative pressure sand box is relieved, the opening and closing cylinder piston rod drives the cover plate to rotate, the sand unloading hole is opened, and dry sand enters the sand unloading station through the sand unloading hole.
The invention has the beneficial effects that:
(1) The invention relates to a V-method sand burying mechanism for sand mold low-pressure casting of ultra-large aluminum alloy castings, which is characterized in that an adjusting motor is started, an output shaft of the adjusting motor drives a first lead screw to rotate, the distance between a lower fixing plate and an upper fixing plate is increased, a negative pressure sand box and a sand box base reversely move, a jacking cylinder in a lifting groove on the sand box base is started, a film take-up and pay-off roller is moved out of the lifting groove, a mounting motor is started, an output shaft of the mounting motor drives a film take-up and pay-off roller to rotate, the film take-up and pay-off roller unreels a PVC film, a driving motor in a guide groove is started, an output shaft of the driving motor drives belt pulleys to rotate, the belt pulleys drive a guide belt to rotate, the PVC film is conveyed by the guide belt, the PVC film is paved on the sand box base, then the guide groove is paved on the guide case, the film take-up and pay-off roller is reclaimed in the lifting groove, the output shaft of the adjusting motor reversely rotates, the negative pressure sand box and the negative pressure sand box base are in contact with the sand box base, the negative pressure sand box base is automatically adjusted, and the sand box base is paved on the sand box base, and the sand box base;
(2) A sand mould shell is assembled and poured in a negative pressure sand box, then dry sand is filled in the negative pressure sand box and compacted, a jacking cylinder in a lifting groove on a top frame is opened, a PVC film is paved on the top frame, the negative pressure connecting pipe is used for vacuumizing, a vehicle body moves through the matching of a steel wheel set and a sliding groove, a lifting cylinder piston rod contracts after a liquid lifting pipe moves above a liquid lifting port, the steel wheel set is retracted into the vehicle body, the liquid lifting port is butted with the liquid lifting pipe, aluminum alloy liquid enters the liquid lifting pipe through the liquid lifting port and enters the negative pressure sand box through the liquid lifting pipe, the sand burying mechanism is more convenient to transfer, lifting equipment is not required to be adopted for transferring, the problem that the lifting is difficult when the oversized sand box is fully loaded is solved, and the investment of the lifting equipment is greatly reduced;
(3) After the pouring is finished and the aluminum alloy casting is solidified and cooled, the automobile body is moved to a sand unloading station, negative pressure of a negative pressure sand box is relieved, a piston rod of an opening and closing air cylinder drives a cover plate to rotate, a sand unloading hole is opened, dry sand enters the sand unloading station through the sand unloading hole, a bottom-dump automatic sand unloading structural design is adopted, raised dust is small during sand unloading, the environment is good, the labor intensity is low, and the risk of box collapse is avoided.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a V-method sand burying mechanism for sand mold low-pressure casting of an ultra-large aluminum alloy casting, disclosed by the invention;
FIG. 2 is an installation view of the negative pressure flask and flask base of the present invention;
FIG. 3 is a schematic view of the base of the flask according to the present invention;
FIG. 4 is a structural view of the vehicle body of the present invention;
FIG. 5 is a cross-sectional view of the vehicle body of the present invention;
FIG. 6 is a bottom view of the flask base of the present invention;
FIG. 7 is an installation view of the first lead screw of the present invention;
FIG. 8 is an installation view of the film take-up and pay-off roll of the present invention;
FIG. 9 is an internal structural view of a guide groove of the present invention;
FIG. 10 is a schematic view of the construction of the pouring floor of the present invention.
In the figure: 1. a negative pressure sand box; 2. a sand box base; 3. a vehicle body; 4. pouring a bottom plate; 5. a lower fixing plate; 6. a first lead screw; 7. an upper fixing plate; 8. a guide bar; 9. adjusting the motor; 10. a groove; 11. a lifting cylinder; 12. a guide bar; 13. a steel wheel set; 14. unloading sand holes; 15. a cover plate; 16. an opening and closing cylinder; 17. connecting a negative pressure pipe; 18. a negative pressure hole; 19. a chute; 20. a liquid lifting port; 21. a riser tube; 22. a top frame; 23. a lifting groove; 24. a film take-up and pay-off roller; 25. installing a motor; 26. a lifting plate; 27. jacking a cylinder; 28. a guide groove; 29. a drive motor; 30. a second lead screw; 31. an adjusting sleeve; 32. a hinged lever; 33. a guide housing; 34. and (4) guiding the motor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-10, the invention relates to a V-process sand burying mechanism for sand mold low-pressure casting of an ultra-large aluminum alloy casting, which comprises a negative pressure sand box 1 and a sand box base 2, wherein the negative pressure sand box 1 is arranged above the sand box base 2, two lower fixing plates 5 are arranged on the sand box base 2, two upper fixing plates 7 are arranged on the negative pressure sand box 1, the two lower fixing plates 5 correspond to the two upper fixing plates 7 one by one, two guide rods 8 are arranged on the upper fixing plates 7, and the two guide rods 8 are slidably connected with the lower fixing plates 5;
the sand box base 2 is arranged on a vehicle body 3, two grooves 10 are formed in the vehicle body 3, the two grooves 10 correspond to the two lower fixing plates 5 one by one, the lower fixing plates 5 are movably arranged in the grooves 10, four lifting cylinders 11 are arranged on the vehicle body 3, and the end parts of piston rods of the lifting cylinders 11 are connected with steel wheel sets 13;
a plurality of sand unloading holes 14 are formed in the sand box base 2, four negative pressure connecting pipes 17 are mounted on the negative pressure sand box 1, a plurality of negative pressure holes 18 are formed in the inner wall of the negative pressure sand box 1, the vehicle body 3 is arranged above the pouring bottom plate 4, a liquid lifting pipe 21 is formed in the sand box base 2, and a liquid lifting port 20 is formed in the pouring bottom plate 4;
Specifically, two bottom plate 5 symmetries are installed in sand box base 2 both sides, and two 7 symmetries of top plate are installed in negative pressure sand box 1 both sides, install adjusting motor 9 on the top plate 7, and adjusting motor 9 output shaft is connected first lead screw 6, and first lead screw 6 threaded connection bottom plate 5, through above structure setting, satisfies the automatic interval between negative pressure sand box 1 and the sand box base 2 and adjusts, and then makes things convenient for the laying of follow-up film on the sand box base 2.
Two grooves 10 are symmetrically arranged on two sides of a vehicle body 3, four lifting cylinders 11 are symmetrically arranged on two sides of the vehicle body 3, four guide rods 12 are symmetrically arranged on two sides of each lifting cylinder 11, the guide rods 12 are slidably arranged on the vehicle body 3, the bottom of each guide rod 12 is connected with a steel wheel set 13, two sliding grooves 19 are formed in a pouring bottom plate 4, the steel wheel sets 13 are slidably arranged on the sliding grooves 19, and through the arrangement of the structure, the sand burying mechanism is more convenient to transfer, hoisting equipment is not required to be adopted for transferring, the problem that 50t-60t is difficult to hoist when the super-large sand box is fully loaded is solved, and the investment of the hoisting equipment is greatly reduced.
A plurality of sand unloading holes 14 are arranged on the sand box base 2 in a rectangular array shape, a plurality of opening and closing cylinders 16 are rotatably arranged at the bottom of the sand box base 2, cover plates 15 are rotatably arranged at the end parts of piston rods of the opening and closing cylinders 16, the sand unloading holes 14 are in one-to-one correspondence with the cover plates 15, the sand unloading holes 14 and the cover plates 15 are matched components, a bottom-unloading type automatic sand unloading structural design is adopted, raised dust is small during sand unloading, the environment is good, the labor intensity is low, and the risk of box collapse is avoided.
Four negative pressure connecting pipes 17 are symmetrically arranged on two sides of the negative pressure sand box 1, and a plurality of negative pressure holes 18 are arranged on the inner wall of the negative pressure sand box 1 in a rectangular array shape, so that the negative pressure vacuumizing efficiency of the sand burying mechanism is improved.
Two inner crawling ladders are symmetrically installed on the inner walls of two sides of the negative pressure sand box 1, two outer crawling ladders are symmetrically installed on the outer walls of two sides of the negative pressure sand box 1, and through the arrangement of the structure, the negative pressure sand box 1 is convenient for personnel to maintain and clean.
The lift tube 21 is arranged in the middle of the base 2 of the sand box, the lift port 20 is arranged in the middle of the pouring bottom plate 4, and the lift tube 21 and the lift port 20 are matched components.
Two jacking cylinders 27 are arranged in the lifting groove 23, the end part of a piston rod of one jacking cylinder 27 is connected with the lifting plate 26, the end part of a piston rod of the other jacking cylinder 27 is connected with the installation motor 25, the output shaft of the installation motor 25 is connected with the film receiving and releasing roller 24, the film receiving and releasing roller 24 is rotatably connected with the lifting plate 26, and through the arrangement of the structure, the film can be automatically paved on the negative pressure sand box 1 and the sand box base 2, and the paving structure and the sand burying mechanism are integrated.
Two articulated rods 32 rotate respectively and install in adjusting collar 31 both sides, and the rotation is provided with a plurality of belt pulleys in the guide shell 33, connects through the transmission of guide belt between a plurality of belt pulleys, and guide motor 34 is installed to the guide shell 33 lateral wall, and one of them belt pulley of guide motor 34 output shaft, through above structure, supplementary transport to the film.
Referring to fig. 1-10, the working process of the V-process sand burying mechanism for sand-mold low-pressure casting of ultra-large aluminum alloy castings according to the present embodiment is as follows:
the method comprises the following steps: the adjusting motor 9 is started, an output shaft of the adjusting motor 9 drives the first lead screw 6 to rotate, the distance between the lower fixing plate 5 and the upper fixing plate 7 is increased, the negative pressure sand box 1 and the sand box base 2 move reversely, the jacking cylinder 27 in the lifting groove 23 on the sand box base 2 is started, the film take-up and pay-off roller 24 moves out of the lifting groove 23, the mounting motor 25 is started, the output shaft of the mounting motor 25 drives the film take-up and pay-off roller 24 to rotate, the film take-up and pay-off roller 24 unreels the PVC film, the driving motor 29 in the guide groove 28 is started, the output shaft of the driving motor 29 drives the second lead screw 30 to rotate, the second lead screw 30 drives the two adjusting sleeves 31 to move oppositely, the four hinged rods 32 drive the guide shell 33 to move out of the guide groove 28, the guide motor 34 is started, the output shaft of the guide motor 34 drives the belt pulleys to rotate, the belt pulleys drive the guide belts to convey the PVC film, the PVC film is laid on the sand box base 2, then the guide shell 33 retracts into the guide groove 28, the film take-up and pay-off roller 24 retracts into the lifting groove 23, the output shaft of the adjusting motor 9 reversely rotates, and the negative pressure sand box base 2;
step two: assembling and pouring a sand mold shell in a negative pressure sand box 1, filling dry sand into the negative pressure sand box 1 for compaction, opening a jacking cylinder 27 in a lifting groove 23 on a top frame 22, paving a PVC film on the top frame 22, vacuumizing through a negative pressure connecting pipe 17, moving a vehicle body 3 through the matching of a steel wheel set 13 and a sliding groove 19, retracting a piston rod of a lifting cylinder 11 after a liquid lifting pipe 21 moves above a liquid lifting port 20, withdrawing the steel wheel set 13 into the vehicle body 3, butting the liquid lifting port 20 with the liquid lifting pipe 21, and allowing aluminum alloy liquid to enter the liquid lifting pipe 21 through the liquid lifting port 20 and enter the negative pressure sand box 1 through the liquid lifting pipe 21;
step three: after the pouring is finished and the aluminum alloy casting is solidified and cooled, the vehicle body 3 is moved to a sand unloading station, the negative pressure of the negative pressure sand box 1 is relieved, the piston rod of the opening and closing air cylinder 16 drives the cover plate 15 to rotate, the sand unloading hole 14 is opened, and dry sand enters the sand unloading station through the sand unloading hole 14.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through two or more elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art. Although one embodiment of the present invention has been described in detail, the description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. A V-method sand burying mechanism for sand mold low-pressure casting of ultra-large aluminum alloy castings is characterized by comprising a negative pressure sand box (1) and a sand box base (2), wherein the negative pressure sand box (1) is arranged above the sand box base (2), two lower fixing plates (5) are arranged on the sand box base (2), two upper fixing plates (7) are arranged on the negative pressure sand box (1), the two lower fixing plates (5) correspond to the two upper fixing plates (7) in a one-to-one mode, two guide rods (8) are arranged on the upper fixing plates (7), and the two guide rods (8) are connected with the lower fixing plates (5) in a sliding mode;
the sand box base (2) is installed on a vehicle body (3), two grooves (10) are formed in the vehicle body (3), the two grooves (10) correspond to the two lower fixing plates (5) in a one-to-one mode, the lower fixing plates (5) are movably installed in the grooves (10), four lifting cylinders (11) are installed on the vehicle body (3), and the end portions of piston rods of the lifting cylinders (11) are connected with steel wheel sets (13);
a plurality of sand unloading holes (14) are formed in the sand box base (2), four negative pressure connecting pipes (17) are mounted on the negative pressure sand box (1), a plurality of negative pressure holes (18) are formed in the inner wall of the negative pressure sand box (1), the vehicle body (3) is arranged above the pouring bottom plate (4), a liquid lifting pipe (21) is formed in the sand box base (2), and a liquid lifting port (20) is formed in the pouring bottom plate (4);
a top frame (22) is installed at the top of the negative pressure sand box (1), lifting grooves (23) are formed in the top frame (22) and the sand box base (2), film receiving and releasing rollers (24) are arranged in the lifting grooves (23), two guide grooves (28) are formed in the top frame (22) and the sand box base (2), a driving motor (29) is installed in each guide groove (28), an output shaft of the driving motor (29) is connected with a second lead screw (30), thread faces at two ends of each second lead screw (30) are symmetrically arranged along the middle, two adjusting sleeves (31) are in threaded connection with two ends of each second lead screw (30), two hinged rods (32) are installed on each adjusting sleeve (31) in a rotating mode, the four hinged rods (32) are all connected with a guide shell (33) in a rotating mode, and a guide belt is installed on each guide shell (33) in a rotating mode;
the two lower fixing plates (5) are symmetrically arranged on two sides of the sand box base (2), the two upper fixing plates (7) are symmetrically arranged on two sides of the negative pressure sand box (1), the upper fixing plates (7) are provided with adjusting motors (9), output shafts of the adjusting motors (9) are connected with first lead screws (6), and the first lead screws (6) are in threaded connection with the lower fixing plates (5);
two jacking cylinders (27) are arranged in the lifting groove (23), the end part of a piston rod of one jacking cylinder (27) is connected with the lifting plate (26), the end part of a piston rod of the other jacking cylinder (27) is connected with the mounting motor (25), the output shaft of the mounting motor (25) is connected with the film receiving and releasing roller (24), and the film receiving and releasing roller (24) is rotatably connected with the lifting plate (26);
two articulated arms (32) rotate respectively and install in adjusting collar (31) both sides, direction shell (33) internal rotation is provided with a plurality of belt pulleys, connects through the direction belt transmission between a plurality of belt pulleys, direction motor (34) are installed to direction shell (33) lateral wall, one of them belt pulley of direction motor (34) output shaft connection.
2. The V-process sand burying mechanism for ultra-large aluminum alloy casting sand mold low-pressure casting is characterized in that two grooves (10) are symmetrically formed in two sides of a vehicle body (3), four lifting cylinders (11) are symmetrically arranged on two sides of the vehicle body (3), four guide rods (12) are symmetrically arranged on two sides of each lifting cylinder (11), the guide rods (12) are slidably arranged on the vehicle body (3), the bottom of each guide rod (12) is connected with a steel wheel set (13), two sliding grooves (19) are formed in a pouring bottom plate (4), and the steel wheel sets (13) are slidably arranged on the sliding grooves (19).
3. The V-method sand burying mechanism for sand mold low-pressure casting of the ultra-large aluminum alloy casting according to claim 1, characterized in that a plurality of sand unloading holes (14) are arranged on the sand box base (2) in a rectangular array, a plurality of opening and closing cylinders (16) are rotatably arranged at the bottom of the sand box base (2), a cover plate (15) is rotatably arranged at the end part of a piston rod of each opening and closing cylinder (16), the plurality of sand unloading holes (14) correspond to the plurality of cover plates (15) one by one, and the sand unloading holes (14) and the cover plates (15) are matched components.
4. The V-method sand burying mechanism for sand mold low-pressure casting of the ultra-large aluminum alloy casting according to claim 1, characterized in that four negative pressure connecting pipes (17) are symmetrically arranged at two sides of the negative pressure sand box (1), and a plurality of negative pressure holes (18) are arranged on the inner wall of the negative pressure sand box (1) in a rectangular array.
5. The V-method sand burying mechanism for sand mold low-pressure casting of the ultra-large aluminum alloy casting according to claim 1, characterized in that two inner ladder stands are symmetrically installed on the inner walls of two sides of the negative pressure sand box (1), and two outer ladder stands are symmetrically installed on the outer walls of two sides of the negative pressure sand box (1).
6. The V-method sand burying mechanism for sand mold low-pressure casting of the ultra-large aluminum alloy casting according to claim 1, characterized in that the liquid lifting pipe (21) is arranged in the middle of the sand box base (2), the liquid lifting port (20) is arranged in the middle of the pouring bottom plate (4), and the liquid lifting pipe (21) and the liquid lifting port (20) are matched components.
7. The V-method sand burying mechanism for sand mold low-pressure casting of ultra-large aluminum alloy castings according to any one of claims 1-6, characterized in that the sand burying mechanism works as follows:
the method comprises the following steps: starting an adjusting motor (9), an output shaft of the adjusting motor (9) drives a first lead screw (6) to rotate, the distance between a lower fixing plate (5) and an upper fixing plate (7) is increased, then a negative pressure sand box (1) and a sand box base (2) move reversely, a jacking cylinder (27) in an ascending and descending groove (23) of the sand box base (2) is started, then a film receiving and releasing roller (24) moves out of the ascending and descending groove (23), a mounting motor (25) is started, an output shaft of the mounting motor (25) drives the film receiving and releasing roller (24) to rotate, the film receiving and releasing roller (24) unreels a PVC film, a driving motor (29) in a guide groove (28) is started, an output shaft of the driving motor (29) drives a second lead screw (30) to rotate, the second lead screw (30) drives two adjusting sleeves (31) to move oppositely, then four hinged rods (32) drive guide shells (33) to move out of the guide groove (28), a guide motor (34) is started, an output shaft of the guide motor (34) drives belt pulleys to rotate, a plurality of guide belt pulleys to rotate, a guide belt carries the PVC film to convey the PVC film, the PVC film in the upper fixing plate (2), the adjusting roller (24) and the ascending and the lifting and the film receiving and releasing roller (24) moves in the guide groove (28), the negative pressure sand box (1) is contacted with the sand box base (2);
step two: assembling and pouring a sand mold shell in a negative pressure sand box (1), filling dry sand into the negative pressure sand box (1) for compaction, opening a jacking cylinder (27) in a lifting groove (23) of a top frame (22), paving a PVC film on the top frame (22), vacuumizing through a negative pressure connecting pipe (17), moving a vehicle body (3) through the matching of a steel wheel set (13) and a sliding groove (19), contracting a piston rod of a lifting cylinder (11) after a liquid lifting pipe (21) moves above a liquid lifting port (20), withdrawing the steel wheel set (13) into the vehicle body (3), butting the liquid lifting port (20) with the liquid lifting pipe (21), and enabling aluminum alloy liquid to enter the liquid lifting pipe (21) through the liquid lifting port (20) and enter the negative pressure sand box (1) through the liquid lifting pipe (21);
step three: after the pouring is finished and the aluminum alloy casting is solidified and cooled, the vehicle body (3) moves to a sand unloading station, the negative pressure of the negative pressure sand box (1) is relieved, the piston rod of the opening and closing air cylinder (16) drives the cover plate (15) to rotate, the sand unloading hole (14) is opened, and dry sand enters the sand unloading station through the sand unloading hole (14).
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| CN114346174A (en) * | 2022-02-22 | 2022-04-15 | 安徽依格尔精密铸造有限公司 | Stainless steel precision casting rapid mold making system |
| CN114799060B (en) * | 2022-05-24 | 2024-08-27 | 南通爱特有色金属制品有限公司 | Casting mold for preventing V-method production of casting air pocket |
| CN115815538B (en) * | 2023-02-03 | 2023-04-25 | 垣曲县晋锋机械铸造有限公司 | Sand unloading mechanism for bottom of lost foam casting sand box |
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