CN115138830A - Casting process of large nickel-aluminum-bronze double-suction impeller for chemical industry - Google Patents
Casting process of large nickel-aluminum-bronze double-suction impeller for chemical industry Download PDFInfo
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- CN115138830A CN115138830A CN202210819173.0A CN202210819173A CN115138830A CN 115138830 A CN115138830 A CN 115138830A CN 202210819173 A CN202210819173 A CN 202210819173A CN 115138830 A CN115138830 A CN 115138830A
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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
- B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
- B22D31/002—Cleaning, working on castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/006—Machines or devices using grinding or polishing belts; Accessories therefor for special purposes, e.g. for television tubes, car bumpers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/18—Accessories
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- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention relates to a casting process of a large nickel-aluminum bronze double-suction impeller for chemical engineering, which comprises the following steps of: designing and manufacturing a core and a sand box according to an impeller to be cast, spraying a refractory coating on the surface of the core, and drying the core in a drying chamber after spraying, wherein the temperature in the drying chamber is kept at 50 ℃; step two, smelting impeller raw materials; step three, casting a raw material of the impeller; opening the box and polishing the casting by a polishing device; the problem of current impeller casting burnishing device, when polishing the impeller, ordinary burnishing roll motion is not nimble enough to burnishing device's removal degree of freedom is less, is difficult to satisfy the demand of polishing of irregular impeller through changing the burnishing roll angle, thereby carries out comprehensive polishing to the irregular surface of impeller is solved.
Description
Technical Field
The invention relates to the technical field of impeller casting, in particular to a casting process of a large-scale nickel-aluminum bronze double-suction impeller for chemical engineering.
Background
The impeller is a typical complex part with more standard modeling, the shape characteristic is obvious, the design of the working profile relates to a plurality of subjects such as aerodynamics, hydromechanics and the like, and therefore the performance parameters of the impeller are greatly influenced by the curved surface processing means, the processing precision and the processing surface quality. The surface of the impeller needs to be polished after the impeller is cast so as to obtain a smooth impeller, so that the resistance of fluid passing through the impeller is reduced, when the impeller is polished by the conventional impeller casting polishing device, a common polishing roller is not flexible enough in movement, the moving freedom degree of the polishing device is low, the polishing requirement of an irregular impeller is difficult to meet by changing the angle of the polishing roller, and the irregular surface of the impeller is polished comprehensively.
In order to solve the above-mentioned drawbacks, a technical solution is now provided.
Disclosure of Invention
The invention aims to provide a casting process of a large nickel-aluminum bronze double-suction impeller for chemical engineering.
The technical problems to be solved by the invention are as follows:
when the existing impeller casting polishing device is used for polishing the impeller, a common polishing roller is not flexible enough in movement, the moving freedom degree of the polishing device is low, and the polishing device is difficult to meet the polishing requirement of an irregular impeller by changing the angle of the polishing roller, so that the irregular surface of the impeller is polished comprehensively.
The purpose of the invention can be realized by the following technical scheme:
a casting process of a large nickel-aluminum bronze double-suction impeller for chemical engineering comprises the following steps:
step one, manufacturing an impeller core: designing and manufacturing a core and a sand box according to an impeller to be cast, spraying a refractory coating on the surface of the core, and drying the core in a drying chamber after spraying, wherein the temperature in the drying chamber is kept at 50 ℃;
step two, smelting impeller raw materials: putting iron, chromium, titanium, manganese, silicon and aluminum into a smelting furnace for smelting at 1650 ℃ to obtain impeller raw materials;
step three, casting impeller raw materials: embedding the mold core coated with the refractory coating into dry sand of a sand box, introducing inert gas into the mold cavity, and then casting the raw material of the impeller, wherein the casting temperature is 1500-1600 ℃;
opening the box and polishing the casting: and opening the box after the temperature of the casting is cooled to 300 ℃, cleaning sand on the surface of the casting, and polishing the surface of the casting by using a polishing device to obtain the large nickel-aluminum-bronze double-suction impeller.
Further, the refractory coating is prepared by mixing corundum powder, quartz powder and water according to the mass ratio of 1.
Further, the thickness of the fire-resistant coating is 0.3-0.45mm.
Further, the impeller comprises the following raw materials in parts by weight: 150-200 parts of iron, 60-100 parts of chromium, 0.1-0.5 part of titanium, 40-80 parts of manganese, 0.1-0.4 part of silicon and 0.1-0.8 part of aluminum.
Further, the polishing device comprises a first workbench, a clamping mechanism for clamping the casting is arranged at the top of the first workbench, a second workbench is fixed at one side of the first workbench, a moving mechanism is arranged at the top of the second workbench, and a polishing mechanism is arranged at one side of the moving mechanism, which is close to the clamping mechanism; the moving mechanism is used for driving the polishing mechanism to move at multiple angles, and the polishing mechanism is used for polishing the surface of the irregular impeller.
Further, fixture includes the first removal seat with first workstation top sliding connection, and the top both sides of first removal seat are equipped with first grip slipper respectively, and second grip slipper, and one side of first removal seat is fixed with the centre gripping motor, and the centre gripping motor can drive the second grip slipper and be close to first grip slipper and carry out the centre gripping to the foundry goods, and one side of second grip slipper is fixed with rotating electrical machines, and the rotating electrical machines can drive the foundry goods and rotate.
Further, moving mechanism includes that the second with second workstation top sliding connection removes the seat, one side that the seat was removed to the second is equipped with the lift seat, the lift seat drives the seat that goes up and down on the seat is removed to the second through first drive assembly, one side of lift seat is connected with first rotation seat through first drive shaft rotation, first rotation seat drives through second drive assembly and rotates on the seat that goes up and down, one side of first rotation seat is fixed with the fixing base, one side of fixing base is connected with the second through second drive shaft rotation and rotates the seat, the second rotates the seat and drives through third drive assembly and rotates on the fixing base.
Further, the polishing mechanism comprises a polishing seat fixed with the second rotating seat, the top of the polishing seat is rotatably connected with a driving wheel, the bottom of the polishing seat is provided with a contact wheel, the top and one side of the polishing seat are rotatably connected with a plurality of guide wheels, the top of the polishing seat is provided with a tensioning wheel, one side of the polishing seat is rotatably connected with a deviation rectifying wheel, polishing belts are arranged among the driving wheel, the tensioning wheel, the deviation rectifying wheel and the outer surface of the contact wheel, and the polishing belts on the contact wheel are in contact with the surface of the casting to polish the casting.
The invention has the beneficial effects that:
according to the impeller polishing device, the clamping mechanism is arranged, so that the clamping motor drives the movable screw rod to rotate, the threaded seat is driven to move on the surface of the movable screw rod, the second clamping seat is close to the first clamping seat, the distance between the first clamping seat and the second clamping seat is changed, the impeller polishing device is convenient to adapt to the clamping requirements of impellers of different specifications, the irregular impeller surface can be stably clamped conveniently through the plurality of clamping rods, the buffer springs can prevent the impeller from being damaged when the clamping rods are in rigid contact with the impeller, the rotary motor can drive the impeller to rotate through the clamping shaft, the impeller surface can be fully polished conveniently through the polishing mechanism, the impeller does not need to be disassembled and assembled again, and the polishing efficiency is improved.
Through setting up moving mechanism, make elevator motor drive the threaded rod and rotate, thereby it goes up and down to drive the seat through the connecting seat, realize polishing mechanism's lift, it rotates to drive first runner through first rotation motor, thereby it rotates to drive the first runner ring of meshing with it, first runner ring drives first runner ring and rotates on the seat of going up and down through first drive shaft, realize polishing mechanism and rotate on the X axle, it rotates the second runner wheel through the second rotation motor drive, thereby it rotates to drive the second runner ring of meshing with it, the second runner ring drives the second runner ring and rotates on the fixing base through the second drive shaft, realize polishing mechanism and rotate on the Y axle, through setting up moving mechanism, make polishing mechanism polishing in-process can realize the rotation and the displacement of multi-angle, when being convenient for polishing mechanism polishes at anomalous foundry goods surface, can change polishing mechanism and foundry goods surface's contact angle wantonly, satisfy the polishing demand of anomalous foundry goods, polishing effect is good, polishing efficiency is high.
Through setting up polishing mechanism, make driving motor drive wheel rotate, thereby cooperation contact wheel, a plurality of leading wheels, take-up pulley and the wheel of rectifying drive polishing belt motion, polishing belt on the contact wheel contacts with the foundry goods surface, polish the foundry goods surface, the first adjust cylinder that sets up can adjust the position of contact wheel through first connecting plate, be convenient for adapt to the polishing demand of different regular shape foundry goods, the polishing mechanism that sets up is different from the polishing form of polishing in the past, through changing the position of contact wheel in the invention, and cooperate moving mechanism to change the angle of contact wheel, accomplish polishing the impeller foundry goods of irregular shape, can satisfy the polishing demand of irregular foundry goods, the time of having practiced thrift artifical polishing, polishing efficiency is improved.
Drawings
The invention is described in further detail below with reference to the figures and specific embodiments.
FIG. 1 is a flow chart of a casting process of a large-scale nickel-aluminum bronze double-suction impeller for chemical engineering, which is disclosed by the invention;
FIG. 2 is a schematic view of the structure of the polishing apparatus of the present invention;
FIG. 3 is a side view of the clamping mechanism of the present invention;
FIG. 4 is a schematic view of the internal structure of the clamping plate of the present invention;
FIG. 5 is a schematic view of the moving mechanism of the present invention;
FIG. 6 is an enlarged view taken at A of FIG. 5 in accordance with the present invention;
FIG. 7 is an enlarged view of the invention at B in FIG. 5;
FIG. 8 is a side elevational view of the first rotating wheel and first rotating ring of the present invention;
fig. 9 is a schematic structural view of the polishing mechanism of the present invention.
In the figure: 1. a first table; 2. a clamping mechanism; 3. a second table; 4. a moving mechanism; 5. a polishing mechanism; 101. a first moving cylinder; 201. a first movable base; 202. a first clamping seat; 203. a second clamping seat; 204. a clamping motor; 205. a clamping plate; 206. a clamping rod; 207. a buffer spring; 208. a rotating electric machine; 301. a second moving cylinder; 401. a second movable base; 402. a lifting seat; 403. a first drive shaft; 404. a first rotating base; 405. a fixed seat; 406. a second drive shaft; 407. a second rotating base; 408. a threaded rod; 409. a connecting seat; 410. a lifting motor; 411. a first rotating motor; 412. a first rotating wheel; 413. a first rotating ring; 414. a second rotating electric machine; 415. a second rotating wheel; 416. a second rotating ring; 501. polishing the base; 502. a drive wheel; 503. a contact wheel; 504. a guide wheel; 505. a tension wheel; 506. a deviation rectifying wheel; 507. polishing the belt; 508. a first connecting plate; 509. a first adjusting cylinder; 510. a second connecting plate; 511. and a second adjusting cylinder.
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 to 9, the present invention provides a technical solution:
example 1
A casting process of a large-scale nickel-aluminum bronze double-suction impeller for chemical engineering comprises the following steps:
step one, manufacturing an impeller core: designing and manufacturing a core and a sand box according to an impeller to be cast, spraying a refractory coating on the surface of the core, and drying the core in a drying chamber after spraying, wherein the temperature in the drying chamber is kept at 50 ℃;
step two, smelting impeller raw materials: putting iron, chromium, titanium, manganese, silicon and aluminum into a smelting furnace for smelting at 1650 ℃ to obtain impeller raw materials;
step three, casting impeller raw materials: embedding the core coated with the refractory coating into dry sand of a sand box, introducing inert gas into the cavity, and then casting the raw material of the impeller, wherein the casting temperature is 1500 ℃;
step four, opening the box and polishing the casting: and after the temperature of the casting is cooled to 300 ℃, opening the box, cleaning the surface of the casting, and polishing the surface of the casting by using a polishing device to obtain the large nickel-aluminum-bronze double-suction impeller.
The refractory coating is prepared by mixing corundum powder, quartz powder and water according to a mass ratio of 1.
The thickness of the fire-resistant coating is 0.3mm.
The impeller comprises the following raw materials in parts by weight: 150 parts of iron, 60 parts of chromium, 0.1 part of titanium, 40 parts of manganese, 0.1 part of silicon and 0.1 part of aluminum.
Example 2
A casting process of a large-scale nickel-aluminum bronze double-suction impeller for chemical engineering comprises the following steps:
step one, manufacturing an impeller core: designing and manufacturing a core and a sand box according to an impeller to be cast, spraying a refractory coating on the surface of the core, and drying the core in a drying chamber after spraying, wherein the temperature in the drying chamber is kept at 50 ℃;
step two, smelting impeller raw materials: putting iron, chromium, titanium, manganese, silicon and aluminum into a smelting furnace for smelting at 1650 ℃ to obtain impeller raw materials;
step three, casting impeller raw materials: embedding the core coated with the refractory coating into dry sand of a sand box, introducing inert gas into the cavity, and then casting the raw material of the impeller, wherein the casting temperature is 1550 ℃;
opening the box and polishing the casting: and after the temperature of the casting is cooled to 300 ℃, opening the box, cleaning the surface of the casting, and polishing the surface of the casting by using a polishing device to obtain the large nickel-aluminum-bronze double-suction impeller.
The refractory coating is prepared by mixing corundum powder, quartz powder and water according to a mass ratio of 1.
The thickness of the fire-resistant coating is 0.4mm.
The impeller comprises the following raw materials in parts by weight: 175 parts of iron, 80 parts of chromium, 0.3 part of titanium, 60 parts of manganese, 0.3 part of silicon and 0.5 part of aluminum.
Example 3
A casting process of a large-scale nickel-aluminum bronze double-suction impeller for chemical engineering comprises the following steps:
step one, manufacturing an impeller core: designing and manufacturing a core and a sand box according to an impeller to be cast, spraying a refractory coating on the surface of the core, and drying the core in a drying chamber after spraying, wherein the temperature in the drying chamber is kept at 50 ℃;
step two, smelting impeller raw materials: putting iron, chromium, titanium, manganese, silicon and aluminum into a smelting furnace for smelting at 1650 ℃ to obtain impeller raw materials;
step three, casting impeller raw materials: embedding the mold core coated with the refractory coating into dry sand of a sand box, introducing inert gas into the mold cavity, and then casting the raw material of the impeller, wherein the casting temperature is 1600 ℃;
opening the box and polishing the casting: and after the temperature of the casting is cooled to 300 ℃, opening the box, cleaning the surface of the casting, and polishing the surface of the casting by using a polishing device to obtain the large nickel-aluminum-bronze double-suction impeller.
The refractory coating is prepared by mixing corundum powder, quartz powder and water according to a mass ratio of 1.
The thickness of the fire-resistant coating is 0.45mm.
The impeller comprises the following raw materials in parts by weight: 200 parts of iron, 100 parts of chromium, 0.5 part of titanium, 80 parts of manganese, 0.4 part of silicon and 0.8 part of aluminum.
The polishing device in the above embodiment includes a first worktable 1, a clamping mechanism 2 is arranged at the top of the first worktable 1, a second worktable 3 is fixed at one side of the first worktable 1, a moving mechanism 4 is arranged at the top of the second worktable 3, and a polishing mechanism 5 is arranged at one side of the moving mechanism 4 close to the clamping mechanism 2; fixture 2 is used for carrying out the centre gripping to the foundry goods, and moving mechanism 4 is used for driving 5 multi-angle displacements of polishing mechanism, improves the scope of polishing, and polishing mechanism 5 is used for polishing irregular impeller surface.
The clamping mechanism 2 comprises a first moving seat 201 which is connected with the top of the first workbench 1 in a sliding mode, a first clamping seat 202 is fixed on one side of the top of the first moving seat 201, a second clamping seat 203 is connected on the other side of the top of the first moving seat 201 in a sliding mode, a clamping motor 204 is fixed on one side of the first moving seat 201, an output end of the clamping motor 204 penetrates through the first moving seat 201 and is fixed with a moving lead screw, a threaded seat is sleeved on an outer surface thread of the moving lead screw and is fixed with the second clamping seat 203, one side, close to each other, of each of the first clamping seat 202 and the second clamping seat 203 is rotatably connected with a clamping plate 205 through a clamping shaft, a plurality of clamping grooves are formed in one side, close to each other, each of the two clamping plates 205 is connected with a clamping rod 206 in a sliding mode, a buffer spring 207 is fixed on the end walls inside the clamping grooves, a rotating motor 208 is fixed on one side of the second clamping seat 203, and an output end of the rotating motor 208 penetrates through the second clamping seat 203 and is fixed with the clamping shaft. Through setting up fixture 2, make the drive of centre gripping motor 204 remove the lead screw and rotate, thereby it removes the screw surface at the removal lead screw to drive the screw thread seat, make second grip slipper 203 be close to first grip slipper 202, change the interval of first grip slipper 202 and second grip slipper 203, be convenient for adapt to the centre gripping demand of different specification impellers, and be convenient for stabilize the centre gripping to irregularly shaped impeller surface through a plurality of holding rods 206 that set up, buffer spring 207 causes the impeller to damage when avoiding holding rod 206 and impeller rigid contact, wherein, rotating electrical machines 208 accessible holding shaft drives the impeller and rotates, be convenient for polish mechanism 5 fully polishes the impeller surface, need not to carry out the dismouting to the impeller once more, improve polishing efficiency.
A first moving cylinder 101 is fixed on one side of the top of the first working table 1, and the output end of the first moving cylinder 101 is fixed with a first moving base 201.
Moving mechanism 4 includes and removes seat 401 with 3 top sliding connection's of second workstation, one side that the second removed seat 401 is equipped with lift seat 402, lift seat 402 drives lift seat 402 through first drive assembly and goes up and down on second removal seat 401, one side of lift seat 402 is rotated through first drive shaft 403 and is connected with first rotation seat 404, first rotation seat 404 drives through second drive assembly and rotates on lift seat 402, one side of first rotation seat 404 is fixed with fixing base 405, one side of fixing base 405 rotates through second drive shaft 406 and is connected with second rotation seat 407, second rotation seat 407 rotates on fixing base 405 through the drive of third drive assembly.
The first driving assembly comprises a lifting groove formed in one side of the second movable seat 401, a threaded rod 408 is rotatably connected in the lifting groove, a connecting seat 409 is connected to the outer surface of the threaded rod 408 in a threaded mode, the connecting seat 409 is connected with the lifting groove in a sliding mode, the connecting seat 409 is fixed with the lifting seat 402, a lifting motor 410 is fixed to the top of the second movable seat 401, and the output end of the lifting motor 410 penetrates through the second movable seat 401 and is fixed with the threaded rod 408.
The second driving assembly comprises a first rotating motor 411 fixed to the top of the lifting seat 402, a first rotating wheel 412 is fixed to the output end of the first rotating motor 411, a first rotating ring 413 is fixed to one side, close to the lifting seat 402, of the first rotating seat 404, the section of the first rotating ring 413 is fan-shaped, gear teeth are arranged on the outer portion of the first rotating ring 413, and the first rotating wheel 412 is meshed with the gear teeth on the outer surface of the first rotating ring 413.
The third driving assembly includes a second rotating motor 414 fixed to the bottom of the fixed base 405, an output end of the second rotating motor 414 passes through the fixed base 405 and is fixed with a second rotating wheel 415, a second rotating ring 416 is fixed to an outer surface of the second driving shaft 406, a cross section of the second rotating ring 416 is fan-shaped, gear teeth are arranged outside the second rotating ring 416, and the second rotating wheel 415 is engaged with the gear teeth on the outer surface of the second rotating ring 416. Through setting up moving mechanism 4, make lift motor 410 drive threaded rod 408 rotate, thereby it goes up and down to drive lift seat 402 through connecting seat 409, realize polishing mechanism 5's lift, it rotates to drive first rotating wheel 412 through first rotating motor 411, thereby it rotates to drive first rotating ring 413 with it meshing, first rotating ring 413 drives first rotating seat 404 and rotates on lift seat 402 through first drive shaft 403, it rotates on the X axle to realize polishing mechanism 5, it rotates to drive second rotating wheel 415 through second rotating motor 414, thereby it rotates to drive second rotating ring 416 with it meshing, second rotating ring 416 drives second rotating seat 407 and rotates on fixing base 405 through second drive shaft 406, it rotates on the Y axle to realize polishing mechanism 5, through setting up moving mechanism 4, make polishing mechanism 5 can realize the rotation and the displacement of multi-angle in the polishing process, when being convenient for polishing mechanism 5 polishes on irregular casting surface, can change polishing mechanism 5 and casting surface's contact angle wantonly, satisfy irregular casting surface's polishing demand, polishing effect is good, polishing efficiency is high.
A second moving cylinder 301 is fixed on one side of the top of the second working table 3, and the output end of the second moving cylinder 301 is fixed with a second moving seat 401.
The polishing mechanism 5 comprises a polishing seat 501 fixed with a second rotating seat 407, the top of the polishing seat 501 is rotatably connected with a driving wheel 502, the bottom of the polishing seat 501 is provided with a contact wheel 503, the top and one side of the polishing seat 501 are rotatably connected with a plurality of guide wheels 504, the top of the polishing seat 501 is provided with a tension wheel 505, one side of the polishing seat 501 is rotatably connected with a deviation rectifying wheel 506, a polishing belt 507 is arranged between the driving wheel 502, the tension wheel 505, the deviation rectifying wheel 506 and the outer surface of the contact wheel 503, the outer surfaces of the guide wheels 504 are all in contact with the polishing belt 507, one side of the top of the polishing seat 501 is fixed with a driving motor, and the output shaft of the driving motor is fixed with the driving wheel 502.
One side of the contact wheel 503 is rotatably connected with a first connecting plate 508, one end of the first connecting plate 508 far away from the contact wheel 503 is rotatably connected with the polishing seat 501, one side of the bottom of the polishing seat 501 is rotatably connected with a first adjusting cylinder 509, and the output end of the first adjusting cylinder 509 is hinged with the first connecting plate 508.
One side of the tensioning wheel 505 is rotatably connected with a second connecting plate 510, one end of the second connecting plate 510, which is far away from the tensioning wheel 505, is rotatably connected with the polishing seat 501, one side of the top of the polishing seat 501 is rotatably connected with a second adjusting cylinder 511, and the output end of the second adjusting cylinder 511 is hinged with the second connecting plate 510. Through setting up polishing mechanism 5, make driving motor drive wheel 502 rotate, thereby cooperation contact wheel 503, a plurality of leading wheels 504, take-up pulley 505 and rectification wheel 506 drive polishing belt 507 and move, polishing belt 507 on the contact wheel 503 contacts with the casting surface, polish the casting surface, the position of contact wheel 503 can be adjusted through first connecting plate 508 to the first air adjusting cylinder 509 that sets up, be convenient for adapt to the polishing demand of different regular shape castings, polishing mechanism 5 that sets up is different from the polishing form in the past, through changing the position of contact wheel 503, and cooperate moving mechanism 4 to change the angle of contact wheel 503, accomplish and polish the impeller casting of irregular shape, can satisfy the polishing demand of irregular casting, the time of artifical polishing has been practiced thrift, polishing efficiency is improved.
The working principle is as follows:
when the polishing machine is used, a casting is placed between two clamping plates 205, a clamping motor 204 drives a movable screw rod to rotate, so that a threaded seat is driven to move on the surface of the movable screw rod, a second clamping seat 203 is driven to approach to a first clamping seat 202, a plurality of clamping rods 206 on two sides are used for clamping the casting, a first movable seat 201 is pushed to move through a first movable cylinder 101, the casting is aligned with a polishing mechanism 5, a second movable cylinder 301 is started to push a second movable seat 401 to move, and the casting is located right below the polishing mechanism 5;
the driving wheel 502 is driven to rotate by the driving motor, so that the polishing belt 507 is driven to move by matching with the contact wheel 503, the guide wheels 504, the tension wheel 505 and the deviation correction wheel 506, the polishing belt 507 on the contact wheel 503 is in contact with the surface of a casting to polish the surface of the casting, the threaded rod 408 is driven to rotate by the lifting motor 410, the lifting seat 402 is driven to lift by the connecting seat 409, so that the polishing mechanism 5 is lifted, the first rotating wheel 412 is driven to rotate by the first rotating motor 411, so that the first rotating ring 413 meshed with the first rotating wheel is driven to rotate, the first rotating ring 413 drives the first rotating seat 404 to rotate on the lifting seat 402 through the first driving shaft 403, so that the polishing mechanism 5 rotates on the X axis, the second rotating wheel 415 is driven to rotate by the second rotating motor 414, so that the second rotating ring 416 meshed with the second rotating ring 416 is driven to rotate, the second rotating ring 407 drives the second rotating seat 407 to rotate on the fixed seat 405 through the second driving shaft 406, so that the polishing mechanism 5 rotates on the Y axis, when the surface of the casting is polished conveniently, the surface of the casting, the casting can be changed at will, and the contact angle between the polishing mechanism 5 and the casting can meet the irregular polishing mechanism, and the irregular polishing angle of the casting.
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 (8)
1. A casting process of a large nickel-aluminum bronze double-suction impeller for chemical engineering is characterized by comprising the following steps:
step one, manufacturing an impeller core: designing and manufacturing a core and a sand box according to an impeller to be cast, spraying a refractory coating on the surface of the core, and drying the core in a drying chamber at the temperature of 50 ℃ after spraying;
step two, smelting impeller raw materials: putting iron, chromium, titanium, manganese, silicon and aluminum into a smelting furnace for smelting at 1650 ℃ to obtain impeller raw materials;
step three, casting impeller raw materials: embedding the core coated with the refractory coating into dry sand of a sand box, introducing inert gas into a cavity, and then casting the raw material of the impeller, wherein the casting temperature is 1500-1600 ℃;
step four, opening the box and polishing the casting: and opening the box after the temperature of the casting is cooled to 300 ℃, cleaning sand on the surface of the casting, and polishing the surface of the casting by using a polishing device to obtain the large nickel-aluminum-bronze double-suction impeller.
2. The casting process of the large-scale nickel-aluminum bronze double-suction impeller for the chemical industry according to claim 1, wherein the refractory coating is prepared by mixing corundum powder, quartz powder and water according to a mass ratio of 1.
3. The casting process of the chemical large-scale nickel aluminum bronze double suction impeller according to claim 1, wherein the thickness of the refractory coating on the core is 0.3-0.45mm.
4. The casting process of the large-sized nickel-aluminum bronze double-suction impeller for the chemical industry according to claim 1, wherein the impeller is prepared from the following raw materials in parts by weight: 150-200 parts of iron, 60-100 parts of chromium, 0.1-0.5 part of titanium, 40-80 parts of manganese, 0.1-0.4 part of silicon and 0.1-0.8 part of aluminum.
5. The casting process of the large-scale nickel-aluminum bronze double-suction impeller for the chemical industry according to claim 1, wherein in the fifth step, the polishing device comprises a first workbench (1), a clamping mechanism (2) for clamping the casting is arranged at the top of the first workbench (1), a second workbench (3) is fixed at one side of the first workbench (1), a moving mechanism (4) is arranged at the top of the second workbench (3), a polishing mechanism (5) is arranged at one side, close to the clamping mechanism (2), of the moving mechanism (4), the moving mechanism (4) is used for driving the polishing mechanism (5) to move in multiple angles, and the polishing mechanism (5) is used for polishing the surface of the irregular impeller.
6. The casting process of the large-scale nickel-aluminum bronze double-suction impeller for the chemical industry according to claim 5, wherein the clamping mechanism (2) comprises a first moving seat (201) connected with the top of the first workbench (1) in a sliding manner, a first clamping seat (202) and a second clamping seat (203) are respectively arranged on two sides of the top of the first moving seat (201), a clamping motor (204) is fixed on one side of the first moving seat (201), the clamping motor (204) can drive the second clamping seat (203) to be close to the first clamping seat (202) so as to clamp the casting, a rotating motor (208) is fixed on one side of the second clamping seat (203), and the rotating motor (208) can drive the casting to rotate.
7. The casting process of the large-scale nickel-aluminum bronze double-suction impeller for the chemical industry according to claim 5, wherein the moving mechanism (4) comprises a second moving seat (401) which is slidably connected with the top of the second workbench (3), a lifting seat (402) is arranged on one side of the second moving seat (401), the lifting seat (402) is driven by a first driving assembly to lift on the second moving seat (401), one side of the lifting seat (402) is rotatably connected with a first rotating seat (404) through a first driving shaft (403), the first rotating seat (404) is driven by a second driving assembly to rotate on the lifting seat (402), a fixed seat (405) is fixed on one side of the first rotating seat (404), one side of the fixed seat (405) is rotatably connected with a second rotating seat (407) through a second driving shaft (406), and the second rotating seat (407) is driven by a third driving assembly to rotate on the fixed seat (405).
8. The casting process of the large-scale nickel-aluminum bronze double-suction impeller for the chemical industry according to claim 7, wherein the polishing mechanism (5) comprises a polishing seat (501) fixed with a second rotating seat (407), the top of the polishing seat (501) is rotatably connected with a driving wheel (502), the bottom of the polishing seat (501) is provided with a contact wheel (503), the top and one side of the polishing seat (501) are rotatably connected with a plurality of guide wheels (504), the top of the polishing seat (501) is provided with a tensioning wheel (505), one side of the polishing seat (501) is rotatably connected with a deviation rectifying wheel (506), polishing belts (507) are installed between the outer surfaces of the driving wheel (502), the tensioning wheel (505), the deviation rectifying wheel (506) and the contact wheel (503), and the polishing belts (507) on the contact wheel (503) are in contact with the surface of the casting so as to polish the casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210819173.0A CN115138830A (en) | 2022-07-12 | 2022-07-12 | Casting process of large nickel-aluminum-bronze double-suction impeller for chemical industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210819173.0A CN115138830A (en) | 2022-07-12 | 2022-07-12 | Casting process of large nickel-aluminum-bronze double-suction impeller for chemical industry |
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| Publication Number | Publication Date |
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| CN115138830A true CN115138830A (en) | 2022-10-04 |
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|---|---|---|---|
| CN202210819173.0A Withdrawn CN115138830A (en) | 2022-07-12 | 2022-07-12 | Casting process of large nickel-aluminum-bronze double-suction impeller for chemical industry |
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| CN (1) | CN115138830A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116922220A (en) * | 2023-09-19 | 2023-10-24 | 江苏杰航科技有限公司 | Polishing device for high-temperature furnace roller of continuous annealing galvanization line |
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| CN111136217A (en) * | 2020-03-05 | 2020-05-12 | 无锡市灵通铸造有限公司 | Casting process of generator impeller |
| CN111958378A (en) * | 2020-09-01 | 2020-11-20 | 徐玉芝 | Processing equipment for casting |
| CN112916804A (en) * | 2021-01-25 | 2021-06-08 | 海安海太铸造有限公司 | Casting process for integrally casting large nodular cast iron impeller of vacuum pump |
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| JP2002326150A (en) * | 2001-05-01 | 2002-11-12 | Hmy Ltd | Blade surface polishing device and polishing method using the same |
| CN206811686U (en) * | 2017-05-11 | 2017-12-29 | 南阳龙腾专用车制造有限公司 | A kind of tank body multi-angle polishes grinding machine |
| CN110607489A (en) * | 2019-10-29 | 2019-12-24 | 徐州市万铭精密铸造有限公司 | Casting process of automobile impeller |
| CN111136217A (en) * | 2020-03-05 | 2020-05-12 | 无锡市灵通铸造有限公司 | Casting process of generator impeller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116922220A (en) * | 2023-09-19 | 2023-10-24 | 江苏杰航科技有限公司 | Polishing device for high-temperature furnace roller of continuous annealing galvanization line |
| CN116922220B (en) * | 2023-09-19 | 2023-11-24 | 江苏杰航科技有限公司 | Polishing device for high-temperature furnace roller of continuous annealing galvanization line |
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