CN109434076B - Air leakage prevention heat preservation non-return aluminum titanate lift tube for low-pressure casting of aluminum alloy - Google Patents
Air leakage prevention heat preservation non-return aluminum titanate lift tube for low-pressure casting of aluminum alloy Download PDFInfo
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- CN109434076B CN109434076B CN201811567840.0A CN201811567840A CN109434076B CN 109434076 B CN109434076 B CN 109434076B CN 201811567840 A CN201811567840 A CN 201811567840A CN 109434076 B CN109434076 B CN 109434076B
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- 229910000505 Al2TiO5 Inorganic materials 0.000 title claims abstract description 126
- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 title claims abstract description 126
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 78
- 238000005266 casting Methods 0.000 title claims abstract description 40
- 238000004321 preservation Methods 0.000 title claims abstract description 36
- 230000002265 prevention Effects 0.000 title claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims description 38
- 239000002184 metal Substances 0.000 claims description 38
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 18
- 238000005219 brazing Methods 0.000 claims description 15
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 12
- 239000004411 aluminium Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 210000002421 cell wall Anatomy 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 9
- 238000001914 filtration Methods 0.000 abstract description 4
- 230000000630 rising effect Effects 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 230000006872 improvement Effects 0.000 description 13
- 229910052742 iron Inorganic materials 0.000 description 8
- 239000000945 filler Substances 0.000 description 6
- 238000007710 freezing Methods 0.000 description 5
- 230000008014 freezing Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B22D18/08—Controlling, supervising, e.g. for safety reasons
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The application discloses an air leakage prevention heat preservation non-return aluminum titanate lift tube for aluminum alloy low-pressure casting, wherein the top end of an aluminum titanate tube is coaxially fixed with a mounting disc, the bottom end of the aluminum titanate tube is coaxially fixed with an aluminum titanate filter tip disc, the top of the aluminum titanate filter tip disc is coaxially provided with a groove, the wall of the groove is provided with a side hole, the bottom of the groove is provided with a bottom hole, the side hole and the bottom hole respectively communicate the groove with the outer side of the aluminum titanate filter tip disc, a matched non-return sheet is arranged in the groove, the non-return sheet moves up and down along the groove, the non-return sheet is provided with a through hole, and the projection of the through hole vertically projected to the bottom of the groove is staggered with the bottom hole. From the structure, the air leakage prevention heat preservation check aluminum titanate lift tube for low-pressure casting of the aluminum alloy has the advantages that in the process of rising into the lift tube, aluminum alloy melt enters the aluminum titanate tube through the bottom hole of the groove and the through hole of the check sheet, and plays roles of skimming and filtering the aluminum alloy melt; the aluminum alloy melt can be enabled to stably enter the aluminum titanate tube, and the quality of aluminum alloy low-pressure casting products is improved.
Description
Technical Field
The application relates to the technical field of lift tubes for aluminum alloy low-pressure casting, in particular to an air leakage prevention heat preservation non-return aluminum titanate lift tube for aluminum alloy low-pressure casting.
Background
At present, a liquid lifting pipe for aluminum alloy low-pressure casting generally adopts an iron material, and the iron material is easy to react with aluminum liquid at high temperature to cause iron increase of the aluminum liquid. The aluminum alloy low-pressure casting liquid lifting tube can also adopt ceramic materials or silicon carbide materials, but under the action of high temperature and casting pressure, the ceramic liquid lifting tube is easy to generate gas leakage phenomenon, and the ceramic materials are easy to generate chemical reaction with aluminum liquid at high temperature, so that the service life of the ceramic liquid lifting tube is very short. The silicon carbide material lift tube is easy to crack and generate gas leakage under the repeated actions of heating and cooling, so that the inside of the cavity is inflated, the cavity cannot be filled with molten metal, and the quality of a product is reduced. In the use process of the liquid lifting pipe, the temperature of the liquid metal at the upper part of the liquid lifting pipe is lower due to the lower temperature of the lower die of the low-pressure casting die, and the phenomenon of freezing and death of the liquid lifting pipe is easy to occur due to heat dissipation in the rising process of the liquid metal. In addition, when the aluminum liquid in the liquid lifting pipe descends and flows back to the crucible after one-time low-pressure casting is finished, the bottom of the crucible is easy to impact to suspend impurities at the bottom of the crucible, and the quality of casting products is influenced along with the aluminum liquid entering the mould in the next casting. Aiming at the problems existing in the existing lift tube, the air leakage prevention heat preservation non-return aluminum titanate lift tube for aluminum alloy low-pressure casting of the patent product is developed to solve the problems of iron increase, air leakage, freezing death, inclusion suspension in a crucible and the like of the aluminum liquid existing in the existing lift tube.
Disclosure of Invention
The application aims at: the air leakage prevention heat preservation check aluminum titanate lift tube for aluminum alloy low-pressure casting is provided, aluminum alloy melt enters an aluminum titanate tube through a bottom hole of a groove and a through hole of a check sheet in the process of rising into the lift tube, and plays roles of skimming and filtering the aluminum alloy melt; meanwhile, the aluminum alloy melt can be enabled to stably enter the tube holes of the aluminum titanate tube, so that the aluminum alloy melt in the tube holes of the aluminum titanate tube is kept in a laminar state, the turbulence degree of the aluminum alloy melt is reduced, and the quality of aluminum alloy low-pressure casting products is improved; the side holes of the grooves prevent the excessive kinetic energy of the aluminum alloy melt from directly falling into the crucible from impacting the bottom of the crucible and causing the impurity at the bottom of the crucible to float upwards, so that the quality of the aluminum alloy melt is prevented from being reduced and the quality of the product produced by the next low-pressure casting is prevented from being influenced; the aluminum titanate filter tip disc is in threaded connection with the aluminum titanate tube, so that the aluminum titanate filter tip disc is convenient to detach and clean when the aluminum titanate filter tip disc is blocked; when the aluminum titanate filter tip disc or the check sheet needs to be replaced, the aluminum titanate filter tip disc or the check sheet can be replaced conveniently; the upper part of the aluminum titanate pipe is provided with a heat preservation pipe, and the cavity of the heat preservation pipe is vacuumized, so that the heat dissipation of the aluminum alloy melt in the aluminum titanate pipe can be reduced, the heat preservation effect is realized, and the freezing death of the aluminum titanate pipe caused by the temperature reduction and solidification of the aluminum alloy melt in the aluminum titanate pipe is prevented; the inner walls of the tube holes of the aluminum titanate tube are contacted with the aluminum alloy melt, and the aluminum alloy melt is not contacted with an iron material in the rising process of the liquid lift tube, so that the iron increase of the aluminum alloy melt is prevented, and the hidden danger of air leakage is avoided; the metal tube is wrapped in the middle of the aluminum titanate tube, so that the strength and the bearing capacity of the whole lift tube can be improved; the brazing layers are arranged on the contact surfaces between the aluminum titanate pipe and the metal pipe and the heat-insulating pipe and the contact surfaces between the heat-insulating pipe and the mounting plate, and can play a role in sealing; the brazing filler metal of the brazing layer is 53Ag-39Pd-5Pt-3Ti, the brazing filler metal has good plasticity, and can play a role in buffering between the metal pipe and the aluminum titanate pipe, the heat preservation pipe and the mounting disc, so that the thermal stress caused by heating and cooling in the use process of the lift pipe and the contact stress between the aluminum titanate pipe and the metal pipe, the heat preservation pipe and the mounting disc are relieved; the distance between the groove bottom of the annular groove and the aluminum titanate filter tip disc is 1-1.2 times of the thickness of the wall of the aluminum titanate tube, so that the aluminum titanate filter tip disc and the aluminum titanate tube are ensured to have enough connection strength.
The technical scheme adopted by the application is as follows:
the utility model provides an aluminum alloy low pressure casting is with leak protection gas heat preservation non return aluminium titanate lift tube, includes the aluminium titanate pipe, the coaxial mounting disc that is fixed with in top of aluminium titanate pipe, the coaxial aluminium titanate filter tip dish that is fixed with in bottom of aluminium titanate pipe, the coaxial recess that is equipped with in top of aluminium titanate filter tip dish, the cell wall of recess be equipped with the side opening the tank bottom of recess is equipped with the bottom opening, side opening and bottom opening communicate the outside of recess and aluminium titanate filter tip dish respectively, be equipped with the check piece that matches in the recess, the check piece is followed the recess and is reciprocated, the check piece is equipped with the through-hole, the projection that the through-hole was thrown perpendicularly to the recess tank bottom staggers with the bottom opening.
The application further improves the scheme that the groove wall of the groove and the position corresponding to the side hole are respectively provided with a guide groove along the direction parallel to the axle center of the aluminum titanate filter tip disc, and the side wall of the check sheet is provided with a matched guide sheet corresponding to the guide groove.
According to a further improvement scheme, the notch of the guide groove points inwards to the axle center of the aluminum titanate filter tip disc, and the top of the guide groove extends upwards to the notch of the groove to form an opening; the bottom of the guide groove extends downwards to the bottom of the groove.
According to a further improvement scheme, the distance between the outer side edge of the guide sheet and the axis of the check sheet is larger than the radius of the tube hole of the aluminum titanate tube.
In a still further improvement of the application, the distance between the upper edge of the orifice on the side of the side hole facing the groove and the bottom of the groove is larger than the thickness of the check sheet, and the distance between the lower edge of the orifice on the side of the side hole facing the groove and the notch of the groove is larger than the thickness of the check sheet.
According to a further improvement scheme of the application, the distance between the lower edge of the orifice of one side of the side hole facing the groove and the bottom of the groove is larger than or equal to the thickness of the check sheet.
According to a further improvement scheme of the application, the distance between the upper edge of the orifice of the side hole facing the groove and the notch of the groove is larger than or equal to the thickness of the check plate.
According to a further improved scheme, the groove opening of the groove is also coaxially provided with an assembly groove, the groove bottom of the assembly groove is communicated with the groove, the bottom end of the aluminum titanate pipe is provided with a boss matched with the assembly groove, and the inner side groove wall of the assembly groove and the outer side wall of the boss are respectively provided with a matched thread B.
According to a further improvement of the application, the bottom of the assembly groove is higher than the side hole.
According to a further improvement scheme, an annular groove is coaxially formed in the top of the aluminum titanate pipe, a metal pipe is fixed in the annular groove, the top of the metal pipe is flush with the top of the aluminum titanate pipe, and the strength of the metal pipe is higher than that of the aluminum titanate pipe.
According to a further improved scheme, a notch is formed in the upper portion of the aluminum titanate tube, which is located on the outer side wall of the annular groove, a heat preservation tube is fixed on the outer side wall of the metal tube at the position corresponding to the notch, and a matched thread A is arranged between the top of the outer side wall of the metal tube and the inner wall of the mounting plate.
The application further improves the scheme that the heat preservation pipe is of a hollow pipe structure.
According to a further improvement scheme, the heat preservation pipe, the mounting plate and the metal pipe are made of steel pipes.
According to a further improvement scheme, a brazing layer is arranged on the contact surface between the aluminum titanate pipe and the metal pipe and the heat-insulating pipe and the contact surface between the heat-insulating pipe and the mounting disc.
According to a further improvement scheme, the brazing filler metal of the brazing layer is 53Ag-39Pd-5Pt-3Ti.
According to a further improvement scheme, the distance between the bottom of the annular groove and the aluminum titanate filter tip disc is 1-1.2 times of the thickness of the wall of the aluminum titanate tube.
According to a further improvement scheme, the non-return sheet is made of graphite.
The application further adopts the improvement that a plurality of through holes are arranged on the check sheet, one through hole is coaxially arranged at the axle center of the check sheet, and the rest through holes are uniformly distributed around the through hole arranged at the center; the bottom holes are respectively and correspondingly positioned at the positions between two adjacent through holes.
According to a further improved scheme, one through hole of the check sheet is coaxially arranged at the axis of the check sheet, the number of the other through holes corresponds to that of the guide sheets, and the axes of the other through holes are respectively corresponding to symmetry axes of the guide sheets passing through the axis of the check sheet.
The application has the beneficial effects that:
the first, the application of an aluminum alloy low pressure casting is with leak protection gas heat preservation non return aluminium titanate lift tube, the aluminium alloy melt rises and enters the lift tube in the course of entering the lift tube, enter the aluminium titanate tube through the bottom hole of the groove and through hole of the non return piece, play the role of skimming, filtering aluminium alloy melt; meanwhile, the aluminum alloy melt can be enabled to stably enter the tube holes of the aluminum titanate tube, so that the aluminum alloy melt in the tube holes of the aluminum titanate tube is kept in a laminar state, the turbulence degree of the aluminum alloy melt is reduced, and the quality of aluminum alloy low-pressure casting products is improved.
The air leakage prevention heat preservation non-return aluminum titanate lift tube for aluminum alloy low-pressure casting prevents the impact on the bottom of the crucible and the floating of impurities at the bottom of the crucible caused by the overlarge kinetic energy of the aluminum alloy melt directly falling into the crucible through the side holes of the grooves, thereby avoiding the influence on the product quality of the next low-pressure casting production caused by the quality reduction of the aluminum alloy melt.
Thirdly, the air leakage prevention heat preservation non-return aluminum titanate lift tube for aluminum alloy low-pressure casting is connected with the aluminum titanate tube through threads, and when the aluminum titanate filter tip plate is blocked, the aluminum titanate filter tip plate is convenient to detach and clean; when the aluminum titanate filter tip disc or the check sheet needs to be replaced, the aluminum titanate filter tip disc or the check sheet can be replaced conveniently.
Fourth, the air leakage prevention heat preservation non-return aluminum titanate lift tube for aluminum alloy low pressure casting is characterized in that a heat preservation tube is arranged at the upper part of the aluminum titanate tube, and a vacuum is pumped into a cavity of the heat preservation tube, so that heat dissipation of aluminum alloy melt in the aluminum titanate tube can be reduced, a heat preservation effect is achieved, and freezing death of the aluminum titanate tube caused by temperature reduction and solidification of the aluminum alloy melt in the aluminum titanate tube is prevented.
Fifth, the anti-leakage heat-preservation non-return aluminum titanate lift tube for low-pressure casting of aluminum alloy is characterized in that the inner wall of a tube hole of the aluminum titanate tube is contacted with aluminum alloy melt, the aluminum alloy melt is not contacted with iron materials in the lifting process of the lift tube, iron increase of the aluminum alloy melt is prevented, and hidden danger of air leakage does not exist.
Sixth, the air leakage prevention heat preservation non-return aluminum titanate lift tube for aluminum alloy low pressure casting, disclosed by the application, has the advantages that the metal tube is wrapped in the middle of the aluminum titanate tube, so that the strength and the bearing capacity of the whole lift tube can be improved.
Seventh, according to the air leakage prevention heat preservation non-return aluminum titanate lift tube for aluminum alloy low-pressure casting, the brazing layers are arranged on the contact surfaces between the aluminum titanate tube and the metal tube and the heat preservation tube and the contact surfaces between the heat preservation tube and the mounting disc, and the brazing layers can play a role in sealing.
Eighth, the anti-leakage heat-insulation non-return aluminum titanate lift tube for low-pressure casting of aluminum alloy has the advantages that the brazing filler metal of the brazing layer is 53Ag-39Pd-5Pt-3Ti, the brazing filler metal has good plasticity, the buffering effect can be achieved between the metal tube and the aluminum titanate tube, the heat-insulation tube and the mounting plate, and the thermal stress caused by heating and cooling and the contact stress between the aluminum titanate tube and the metal tube, the heat-insulation tube and the mounting plate in the use process of the lift tube are relieved.
Ninth, according to the air leakage prevention heat preservation non-return aluminum titanate lift tube for aluminum alloy low-pressure casting, the distance between the bottom of the annular groove and the aluminum titanate filter tip disc is 1-1.2 times of the thickness of the tube wall of the aluminum titanate tube, so that the aluminum titanate filter tip disc and the aluminum titanate tube are guaranteed to have enough connection strength.
Description of the drawings:
FIG. 1 is a schematic cross-sectional front view of the present application when not in use.
Fig. 2 is a schematic front cross-sectional view of the present application when aluminum alloy low-pressure casting is performed.
Fig. 3 is an enlarged schematic top view of the check plate.
Fig. 4 is an enlarged schematic top view of an aluminum titanate filter disc.
The specific embodiment is as follows:
referring to fig. 1 to 4, the aluminum titanate filter tip comprises an aluminum titanate tube 1, wherein a mounting plate 7 is coaxially fixed at the top end of the aluminum titanate tube 1, an aluminum titanate filter tip disk 9 is coaxially fixed at the bottom end of the aluminum titanate tube 1, a groove 10 is coaxially arranged at the top of the aluminum titanate filter tip disk 9, a side hole 12 is arranged on the groove wall of the groove 10, a bottom hole 13 is arranged at the groove bottom of the groove 10, the side hole 12 and the bottom hole 13 are used for communicating the groove 10 with the outer side of the aluminum titanate filter tip disk 9 respectively, a matched check plate 11 is arranged in the groove 10, the check plate 11 moves up and down along the groove 10, a through hole 15 is arranged on the check plate 11, and projections of the through hole 15 perpendicularly projected to the groove bottom of the groove 10 are staggered with the bottom hole 13.
The groove wall of the groove 10 and the position corresponding to the side hole 12 are respectively provided with a guide groove 20 along the direction parallel to the axis of the aluminum titanate filter tip disc 9, and the side wall of the check sheet 11 is provided with a matched guide sheet 14 corresponding to the guide groove 20.
The notch of the guide groove 20 points inwards to the axle center of the aluminum titanate filter tip disc 9, and the top of the guide groove 20 extends upwards to the notch of the groove 10 to form an opening; the bottom of the guide groove 20 extends downward to the bottom of the recess 10.
The distance between the outer side edge of the guide sheet 14 and the axis of the check sheet 11 is larger than the radius of the pipe hole 2 of the aluminum titanate pipe 1.
The distance between the upper edge of the orifice on the side of the side hole 12 facing the groove 10 and the bottom of the groove 10 is greater than the thickness of the check sheet 11, and the distance between the lower edge of the orifice on the side of the side hole 12 facing the groove 10 and the notch of the groove 10 is greater than the thickness of the check sheet 11.
The distance between the lower edge of the orifice of the side hole 12 facing the groove 10 and the bottom of the groove 10 is more than or equal to the thickness of the check sheet 11.
The distance between the upper edge of the orifice of the side hole 12 facing the groove 10 and the notch of the groove 10 is greater than or equal to the thickness of the check sheet 11.
The notch of the groove 10 is also coaxially provided with an assembly groove 19, the bottom of the assembly groove 19 is communicated with the groove 10, the bottom end of the aluminum titanate pipe 1 is provided with a boss 8 matched with the assembly groove 19, and the inner side groove wall of the assembly groove 19 and the outer side wall of the boss 8 are respectively provided with a matched thread B17.
The bottom of the assembly groove 19 is higher than the side hole 12.
The top of the aluminum titanate pipe 1 is coaxially provided with an annular groove 3, a metal pipe 4 is fixed in the annular groove 3, the top of the metal pipe 4 is flush with the top of the aluminum titanate pipe 1, and the strength of the metal pipe 4 is greater than that of the aluminum titanate pipe 1.
The outside cell wall of ring channel 3, be located the upper portion of aluminium titanate pipe 1 and be equipped with breach 5, the lateral wall of tubular metal resonator 4, be fixed with insulating tube 6 corresponding to breach 5 position department, be equipped with the screw thread A16 of matching between the lateral wall top of tubular metal resonator 4 and the mounting disc 7 inner wall.
The heat preservation pipe 6 is of a hollow pipe structure.
The material of the heat preservation pipe 6, the material of the mounting plate 7 and the material of the metal pipe are all steel pipes.
The braze welding layer 18 is arranged on the contact surface between the aluminum titanate tube 1 and the metal tube 4 and the heat insulation tube 6 and the contact surface between the heat insulation tube 6 and the mounting plate 7.
The brazing filler metal of the brazing layer 18 is 53Ag-39Pd-5Pt-3Ti.
The distance between the bottom of the annular groove 3 and the aluminum titanate filter tip disk 9 is 1-1.2 times of the thickness of the wall of the aluminum titanate pipe 1.
The material of the check sheet 11 is graphite.
The through holes 15 of the check sheet 11 are provided with 5 through holes 15, one through hole 15 is coaxially arranged at the axle center of the check sheet 11, the rest 4 through holes 15 are uniformly distributed around the through hole 15 arranged at the center, and the axle centers of the rest 4 through holes 15 are respectively corresponding to symmetry axes of the guide sheet 14 passing through the axle center of the check sheet 11; the bottom holes 13 are provided with 4 positions respectively corresponding to positions between two adjacent through holes 15.
When the aluminum alloy low-pressure casting device is used, in the low-pressure casting process of aluminum alloy, the aluminum titanate pipe 1 is inserted into a crucible filled with aluminum alloy molten liquid, a certain pressure is applied to the surface of the aluminum alloy molten liquid, the aluminum alloy molten liquid is pressed into the pipe hole 2 of the aluminum titanate pipe 1, the check sheet 11 floats upwards along the groove 10 due to the fact that the density of graphite is lower than that of the aluminum alloy molten liquid, meanwhile, when the aluminum alloy molten liquid rises, the aluminum alloy molten liquid passes through the through hole 15 on the check sheet 11, upward acting force is exerted on the check sheet 11, the check sheet 11 is positioned at the top of the groove 10, and the top surface of the check sheet 11 is contacted with the end face of the boss 8.
Then, as the bottom hole 13 at the bottom of the groove 10 is staggered with the through hole 15 of the check plate 11, the aluminum alloy melt can play roles of skimming and filtering the aluminum alloy melt when passing through the bottom hole 13 of the groove 10 and the through hole 15 of the check plate 11; meanwhile, the aluminum alloy melt can be enabled to stably enter the pipe hole 2 of the aluminum titanate pipe 1, the aluminum alloy melt in the pipe hole 2 of the aluminum titanate pipe 1 is enabled to be kept in a laminar state, the turbulence degree of the aluminum alloy melt is reduced, and therefore the quality of aluminum alloy low-pressure casting products is improved.
When the low pressure casting is completed, the aluminum alloy melt in the pipe hole 2 of the aluminum titanate pipe 1 descends and flows back into the crucible, and in the process of descending and flowing back of the aluminum alloy melt, the check plate 11 descends to the bottom of the groove 10 due to the acting force generated when the aluminum alloy melt descends, and the bottom hole 13 at the bottom of the groove 10 is staggered with the through hole 15 of the check plate 11, so that the bottom hole 13 and the through hole 15 mutually seal each other. So that the aluminum alloy melt can only flow outwards through the side holes 12 of the groove 10 and enter the crucible. Therefore, the phenomenon that the kinetic energy of the aluminum alloy melt directly falls into the crucible is overlarge to impact the bottom of the crucible, so that impurities at the bottom of the crucible float upwards is prevented, and the quality of the aluminum alloy melt is prevented from being reduced to influence the quality of products produced by the next low-pressure casting.
The aluminum titanate filter tip disc 9 is in threaded connection with the aluminum titanate tube 1, and when the aluminum titanate filter tip disc 9 is blocked, the aluminum titanate filter tip disc is convenient to detach and clean. When the aluminum titanate filter disc 9 or the check sheet 11 needs to be replaced, it can be replaced conveniently.
The upper part of the aluminum titanate tube 1 is provided with the heat preservation tube 6, and the cavity of the heat preservation tube 6 is vacuumized, so that the heat dissipation of the aluminum alloy melt in the aluminum titanate tube 1 can be reduced, the heat preservation effect is achieved, and the freezing death of the aluminum titanate tube 1 caused by the reduction and solidification of the temperature of the aluminum alloy melt in the aluminum titanate tube 1 is prevented.
Claims (4)
1. An aluminum alloy low pressure casting is with leak protection gas heat preservation non return aluminium titanate lift tube, its characterized in that: comprises an aluminum titanate tube (1), a mounting plate (7) is coaxially fixed at the top end of the aluminum titanate tube (1), an aluminum titanate filter tip plate (9) is coaxially fixed at the bottom end of the aluminum titanate tube (1), a groove (10) is coaxially arranged at the top of the aluminum titanate filter tip plate (9), a side hole (12) is arranged on the groove wall of the groove (10), a bottom hole (13) is arranged at the groove bottom of the groove (10), the side hole (12) and the bottom hole (13) are respectively communicated with the groove (10) and the outer side of the aluminum titanate filter tip plate (9), a matched check plate (11) is arranged in the groove (10), the material of the check plate is graphite, the density of the graphite is lower than that of an aluminum alloy melt, the check plate (11) moves up and down along the groove (10), the check plate (11) is provided with a through hole (15), the projection of the through hole (15) perpendicularly projecting to the groove bottom of the groove (10) is staggered with the bottom hole (13),
the top of the aluminum titanate tube (1) is coaxially provided with an annular groove (3), a metal tube (4) is fixed in the annular groove (3), the top of the metal tube (4) is flush with the top of the aluminum titanate tube (1), the strength of the metal tube (4) is greater than that of the aluminum titanate tube (1),
the distance between the groove bottom of the annular groove (3) and the aluminum titanate filter tip disc (9) is 1-1.2 times of the thickness of the tube wall of the aluminum titanate tube (1),
the groove wall of the groove (10) and the position corresponding to the side hole (12) are respectively provided with a guide groove (20) along the direction parallel to the axle center of the aluminum titanate filter tip disc (9), the side wall of the check sheet (11) is provided with a matched guide sheet (14) corresponding to the guide groove (20),
the notch of the guide groove (20) points inwards to the axle center of the aluminum titanate filter tip disc (9), and the top of the guide groove (20) extends upwards to the notch of the groove (10) to form an opening; the bottom of the guide groove (20) extends downwards to the bottom of the groove (10),
the distance between the outer side edge of the guide sheet (14) and the axle center of the check sheet (11) is larger than the radius of the tube hole (2) of the aluminum titanate tube (1),
the distance between the upper edge of the orifice of the side hole (12) facing the groove (10) and the bottom of the groove (10) is larger than the thickness of the check sheet (11), and the distance between the lower edge of the orifice of the side hole (12) facing the groove (10) and the notch of the groove (10) is larger than the thickness of the check sheet (11).
2. The leakage-proof heat-preserving non-return aluminum titanate lift tube for low-pressure casting of aluminum alloy as claimed in claim 1, wherein: the notch of recess (10) still is equipped with assembly groove (19) with the heart, the tank bottom of assembly groove (19) communicates with recess (10), the bottom of aluminum titanate pipe (1) is equipped with boss (8) with assembly groove (19) matching, the inboard cell wall of assembly groove (19) and the lateral wall of boss (8) are equipped with screw thread B (17) of matching respectively.
3. The leakage-proof heat-preserving non-return aluminum titanate lift tube for low-pressure casting of aluminum alloy as claimed in claim 1, wherein: the utility model discloses a metal pipe, including ring channel (3), metal pipe (4), including metal pipe (4), ring channel, mounting disc (7), outside cell wall, the upper portion that is located titanate aluminum pipe (1) of ring channel (3) are equipped with breach (5), the lateral wall of metal pipe (4), be fixed with insulating tube (6) corresponding to breach (5) position department, be equipped with matched screw thread A (16) between the lateral wall top of metal pipe (4) and mounting disc (7) inner wall.
4. The air leakage prevention, heat preservation and non-return aluminum titanate lift tube for low-pressure casting of aluminum alloy as claimed in claim 3, wherein: the brazing layers (18) are arranged on the contact surface between the aluminum titanate pipe (1) and the metal pipe (4) and the heat-insulating pipe (6) and the contact surface between the heat-insulating pipe (6) and the mounting disc (7).
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| CN201811567840.0A CN109434076B (en) | 2018-12-21 | 2018-12-21 | Air leakage prevention heat preservation non-return aluminum titanate lift tube for low-pressure casting of aluminum alloy |
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| CN201811567840.0A CN109434076B (en) | 2018-12-21 | 2018-12-21 | Air leakage prevention heat preservation non-return aluminum titanate lift tube for low-pressure casting of aluminum alloy |
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| JP7426883B2 (en) * | 2020-04-02 | 2024-02-02 | 株式会社Uacj | Method for manufacturing aluminum assembled bodies and brazed bodies |
| CN115502369A (en) * | 2022-10-31 | 2022-12-23 | 哈尔滨工业大学 | Slag-blocking method for low-pressure casting of magnesium alloy |
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