CN1132127A - 'Continuous directional solidifying precision casting process and appts. for shaped cylinder-shape thin wall piece - Google Patents
'Continuous directional solidifying precision casting process and appts. for shaped cylinder-shape thin wall piece Download PDFInfo
- Publication number
- CN1132127A CN1132127A CN 95103050 CN95103050A CN1132127A CN 1132127 A CN1132127 A CN 1132127A CN 95103050 CN95103050 CN 95103050 CN 95103050 A CN95103050 A CN 95103050A CN 1132127 A CN1132127 A CN 1132127A
- Authority
- CN
- China
- Prior art keywords
- crystallizer
- intercooler
- core
- foundry goods
- ceramic core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
A precise casting technology of large shaped cylindrical thin-wall workpiece features that continuous directional solidification or continuous casting with electromagnetic crystallizer is used for external surface of casting and the directionally solidifying precise casting is used for its internal surface. A thin-wall ceramic core including heating, insulating and cooling units is used to form the internal surface of casting. Its heating and cooling units can revolve for making the temp of periphery and internal and external surfaces in the same horizontal level uniform.
Description
The invention provides a kind of continuous directional solidification precision casting technology and equipment of special-shaped tubular large thin-wall element, be particularly useful for making the missile bay body.
Tub also claims the missile bay body, is thin and long cylindrical part, and the general tactics missile diameter is about 300mm～1000mm, reaches 7～8 meters.In order to install and some cabins section that often it is decomposed into easy to make, some cabin section is cast with high-strength aluminum alloy, general cabin segment length 800mm (maximum reach 3000mm), thick 2～3mm, outer surface is the face of cylinder, inner surface has reinforcement and boss chess piece etc. anyhow, and they highly may be above several times or tens times of general wall thickness.The missile bay body will bear thrust of air-flow externally applied forces, inertia force, jet pipe or the like as the main body of spacecraft in addition, thereby requires it must have very high mechanical performance and metallurgical quality, and each cabin section all will be passed through the x-ray fluoroscopy inspection.To crackle, shrinkage porosite, pore, the casting flaw restriction such as to be mingled with very strict.Therefore the casting of missile bay is that very difficult, general casting method is inefficient.All adopt the counter-pressure casting method to produce it both at home and abroad,,, remain: 1. fillibility deficiency in the some shortcomings part from for many years the production effect and the angle of further improving the quality of products though this method is the effective technology of production large thin-wall element of generally acknowledging.The cabin section that it is cast, when length was 800mm, its thickness was 8mm, failed to satisfy the requirement of the longer thinner cabin of casting section far away.2. feeding deficiency.Shrinkage defect often occurs, percent defective reaches 50%.Its longest cabin segment length 3000mm of tactical missile that a kind of advanced person is abroad arranged at present, thickness 2.5mm.Long but also thin so not only cabin Duan Shang does not find effective casting production process.
Since Chalmers at first adopts directional solidification studying plane and born of the same parents' shape to solidify in nineteen fifty-two, directional solidification technique is developed rapidly, since 60～seventies directional solidification precision casting have ever made huge contribution for production and the performance that improves the aero gas turbine engine blade.Someone claims that be the age of directional solidification blade the eighties of turbo blade, and then be the age [1] of single crystal blade the nineties.As everyone knows, the fundamental prerequisite of directional solidification makes the enough thermograde G of liquid maintenance on solid-liquid interface exactly
L, surplus in the of 20 year over the significant improvement of relevant directional solidification technique all carry out basically around above-mentioned problem, see document [1], [2], [3], [4].Wherein outstanding process is:
1. high speed freezing method (abbreviating H, R, S method as), its main points are that the finish cast die shell is fixed on the water-cooled copper base (also claiming crystallizer), rise up in the heat tracing stove, make the copper pedestal and the width of cloth penetrate baffle plate at sustained height, are cooling device below.During work earlier top heat tracing stove be heated to predetermined temperature, cast article, to copper pedestal spray cooling water, then copper pedestal is descended, make high temperature (more than the melting point metal) formwork drop to the cooling zone gradually.
2. liquid metal cooling method (L, M, C method), with the difference of last method mainly below the cooling zone change a pond liquid metal tin into, after the foundry goods casting, copper pedestal (or claiming crystallizer) and formwork are fallen into Xi Chizhong with certain speed, can further improve thermograde G like this
LAlthough directional solidification technique has been made huge contribution on the development blade, but its type of cooling is by copper pedestal and the heat radiation downwards of the foundry goods in formwork itself, and outwards dispel the heat by formwork, these heat radiation approach all are slow, this has just determined its productivity ratio and casting dimension to be subjected to certain limitation, so far the length of blade of being produced has only mm more than 100, and other small-sized foundry goods.
Famous scholars such as Kerr, M.C.flemings and big wild sincere U.S. have been developed this technology, continuous directional solidification technology [5], [6] have been proposed, its the frozen metal part expose in atmosphere or cooling medium (not in formwork) fully, this has just improved cooling velocity greatly, produced the various small-cross section profiles (about diameter 10mm) of endless, but it is just impossible to produce irregularly-shaped castings with it.This method becomes the effective way of producing small bore high-grade section bar now.As seen directional solidification and continuous directional solidification still are in theoretical research, produce small-sized foundry goods and small-cross section profiles stage now, with the production of its theoretical solution heavy castings and the work of quality problems finding are not arranged as yet.In addition, the electromagnetic crystallizer continuous casting process formally put into production in the Soviet Union then in 1969, and the U.S. also put into production after 8 years.See [7], [8], [9], [10].This technology has many superiority, generally acknowledged by countries in the world that its main feature is that foundry goods is not molded before not solidifying, do not contact and only under electromagnetic force and surface tension effects, form bright and clean surface, treat that it solidifies rear surface fineness and can reach with any solid matter
6[7].
The so-called special-shaped tubular large thin-wall element of the present invention means the used large tube-like of space flight and aviation cabin body and wallboard, most typical product is exactly the missile bay section, it is that diameter is 300～1000mm, inside and outside surface is the garden cylinder, but be distributed with different reinforcements anyhow, garden platform chess piece etc. on the inner surface, thickness is 2.5mm, length 800～3000mm.Treat such foundry goods, space flight and aircraft industry are used very wide, still do not have desirable casting method at present.Directional solidification or continuous directional solidification or electromagnetic crystallizer continuous casting all can not be finished this mission.But the high-quality of three's product that is to say high density (deriving from high feeding performance), and three's high filling capacity (document [6] is said the little rod that can cast out Φ 0.5mm) then is the foundation that the present invention proposes.
The objective of the invention is three's characteristics are combined, propose a kind of continuous directional solidification precision casting technology and equipment that is applicable to the missile bay body that making is not only long but also thin, to improve the quality of spacecraft.
The concrete practice of the present invention is moulding, heating and the type of cooling that the outer surface (outer garden cylinder) at foundry goods adopts continuous directional solidification, and for example its garden cylindrical outer surface is by crystallizer (7) moulding.On crystallizer (7), aluminum alloy melt (11) is with calandria (12) heating, and under crystallizer (7), it is cooled off with inner rotary cooler (6) in the surface outside the foundry goods.And its inner surface is an interior garden cylinder, be distributed with reinforcement and boss chess piece etc. anyhow on it, adopt directional solidification precision casting [1], the moulding of [3], heating, the type of cooling: adopt shell ceramic core (21) moulding, near liquid-solid boundary (34), be provided with the width of cloth and penetrate baffle plate (32), be provided with interior rotary funace (20) thereon, under it, be provided with intercooler (2).
The core print (33) of shell ceramic core (21) by heat-resisting steel is assemblied in draws on the base (1), with interior hexagonal counter-sunk screw locking, around both, refill and mix extraction catheter (3) again, with screw lock it.Before the work beginning, draw base (1) and drive shell ceramic core (21) and extraction catheter (3), from bottom to top enter in the crystallizer (7), stop at the top that makes extraction catheter (3) and enter 20mm place in crystallizer (7) end opening.
General continuous directional solidification method, the problem of research is a little bar about Φ 10mm, from graphite crystallizer, draw, obtain a quality product, governing factor is also fewer: 1. the liquid metals temperature, 2. the graphite crystallization actuator temperature, 3. cooling medium amount and kind, 4. cooling medium and crystallizer square from.The present invention is more than last method complexity, and its particularity is:
1. product is special-shaped tubular large thin-wall element, though the very little casting dimension in its cross section very big (it is long to reach 3000mm, and diameter of phi can reach 1000mm).Thereby might produce the even phenomenon of temperature distributing disproportionation at garden, upper edge, same horizontal cross-section Zhou Fangxiang, and cause the technology failure.In order to address this problem, the present invention has adopted the heating and the cooling device of rotation, has for example adopted interior rotary funace (20) and inner rotary cooler (6) and intercooler (2).
2. shell ceramic core (21) must move simultaneously with foundry goods, and is simultaneously static, promptly keep static relatively, otherwise just can not casting inner surface has the missile bay section of reinforcement and garden platform chess piece etc. anyhow, so be referred to as " servo-actuated core ".
3. very big as the shell ceramic core (21) of " servo-actuated core " to the temperature field influence of foundry goods, thereby its thermophysical property (as thermal conductivity, heating cooling time stability) is very important.General turbine engine blade directional solidification precision casting is all used ceramic shell mould (being mixed with the oar material and aluminium vanadine granulated aggregate is made by silicate hydrolyzate liquid and aluminium vanadine powder), belongs to heat-insulating material, falls far short with the thermal conductivity of aluminium alloy.The present invention then requires bigger thermal conductivity, when preparing the slurry of shell ceramic core (21), has increased graphite powder except that silicate hydrolyzate liquid and aluminium vanadine powder for this reason, except that aluminium vanadine particle, has also increased graphite granule or wire netting fragment etc. in aggregate.
4. the present invention has different processing processing modes to the surfaces externally and internally of product: the heating, moulding, the type of cooling that its outer surface are adopted continuous directional solidification method (for example O, C, C method) or electromagnetic crystallizer continuous casting process.Its inner surface is then adopted heating, moulding, the type of cooling of directional solidification precision casting method.But these two kinds of technologies all have certain liquid-solid boundary position, for example the liquid-solid boundary position of directional solidification method is near the width of cloth is penetrated baffle plate, and the liquid-solid boundary of continuous directional solidification method exit under crystallizer, therefore should guarantee when this equipment is installed: the width of cloth in the shell ceramic core (21) is penetrated baffle plate (32) should be in same level height with the following outlet of crystallizer (7).The type of cooling of these two kinds of technologies has very big difference in addition: outer surface directly contacts cooling medium, and its inner surface is surrounded by shell ceramic core (21), cooling medium is sprayed on the shell ceramic core (21), can not directly contact the inner surface of foundry goods, therefore cause foundry goods surfaces externally and internally non-uniform temperature easily, cause the technology failure.For surfaces externally and internally temperature evenly (being that the surfaces externally and internally thermograde is little) and thermograde that enough big vertical direction is arranged, just need control several factors (except four factors that the above general continuous directional solidification will be controlled) as the heating intensity and the geometric height of calandria (12) and interior rotary funace (20).The intensity of cooling (quantity, the kind that comprise cooling medium) of intercooler (2) and inner rotary cooler (6), and inner rotary cooler (6) must be lower than the certain square of intercooler (2) from.
Good effect of the present invention:
1. can stop shrinkage defect
2. can cast the thick cabin section of 2.5mm, not be subjected to the restriction of length and alloy species.
3. can realize hot investment casting for large-scale cabin section, its outer surface is by finish turning graphite crystallizer or electromagnetic crystallizer moulding, and its inner surface is by the ceramic core moulding, so the foundry goods surfaces externally and internally is bright and clean, size is accurate, can realize not having surplus or few surplus casting.
4. can produce high comprehensive mechanical performance missile bay body, especially fatigue behaviour, decay resistance, heat resistance, percentage elongation will be greatly improved.
When thereby the sand mold of 5. having cancelled former technology has been saved sandbox, model, molding mixture, moulder etc., reduced cost.
Embodiment one
Fig. 1 is an equipment schematic diagram of executing example one of the present invention, and Fig. 3 is the A-A generalized section of Fig. 1, below in conjunction with Fig. 1 and Fig. 3 device structure of the present invention is described.Present device is made up of following four parts:
Bottom is " drawing and cooling segment ", comprises the parts of sequence number 1-6.
The centre is " a heat tracing stove ", comprises the parts of sequence number 7-15.
Topmost be " core gives hot stove ", comprise the parts of sequence number 16-19.
The side is " aluminium water stores and filter stove ", comprises the parts of sequence number 22-29.
Wherein:
The garden dribbling of drawing base (1) and be a heat-resisting steel has a hollow filament thick stick, can move up and down along vertical axis in order to guarantee it, and it also is locked on the base plate (35) with nut, and base plate (35) has four axis holes to be through on four vertical pillars (36).Draw base and also have a centre bore, wherein running through central vertical shaft (39).
Intercooler (2) is a red copper pipeloop, there are one or two row's apertures in the outside, be installed on the central vertical shaft (39), under crystallizer (7) the certain square in side from, when center vertical axis (39) when its injects cooling medium, cooling medium then sprays side within shell ceramic core (21) equably by aperture, if central vertical shaft (39), when rotating slowly, it is and then rotation also, and sprays and cool off more evenly.Cooling medium can adopt water or frozen water or cooling agent (water+ice cube+salt is formulated).
Extraction catheter (3) is the external diameter heat resisting pipe identical with the foundry goods external diameter, be assemblied in to draw outside base (1), shell ceramic core (21) and the core print (33), by the ring-type inner flange by screw from bottom to top with draw base (1) and link together.Initial position before not starting working is: the top of extraction catheter (3) from bottom to top enters 20mm in the crystallizer, so the top of crystallizer (7), shell ceramic core (21) and following extraction catheter (3) has just constituted die cavity, is unlikely after aluminium liquid enters and misses.
Dovetail groove (4) shape as shown in Figure 4, have 16, be evenly distributed on the top of extraction catheter (3), when first strand of aluminium liquid enters when contacting wherein with extraction catheter (3), after solidify foundry goods bottom (5), link together by solid aluminum in the dovetail groove (4) and extraction catheter (3).
Foundry goods bottom (5)
Inner rotary cooler (6) is a red copper pipeloop, under the following outlet of crystallizer (7) side be lower than the certain square of intercooler (2) from, with to draw base coaxial by dress, can slowly back and forth rotate, there are one or two row's apertures the inboard, can spray cooling medium equably in cast(ing) surface, cooling medium can adopt water or frozen water or cooling agent (formulated as water+ice cube+salt).
Crystallizer (7) is a graphite garden tube that internal diameter is identical with the foundry goods external diameter, and certain thickness is arranged, and also useful ceramics or stainless steel are made.Be installed on the drop-bottom (8), under the crucible (10), the coaxial installation in hole within its endoporus and crucible (10) and the drop-bottom (8).
Drop-bottom (8) is the ring-type plate that steel plate is made, and its diameter of bore is slightly larger than the foundry goods external diameter, and it is being supported by four columns (36), is carrying again that heat tracing stove, core give hot stove, aluminium water is stored and filter the stove total weight.
Crystallizer heating furnace (9) is a resistance wire furnace (or annular silicon carbon resistor) that turns around outside crystallizer (7).
The similar large-scale laundry basin of crucible (10) shape, but the porose foundry goods that is slightly larger than in center makes with graphite or Sic, is installed on the crystallizer (7).
Aluminum alloy melt (11) splendid attire is in crucible (10).
Calandria (12) is resistance wire (an also available silicon carbon-point), is installed in side within the insulation material (13).
Insulation material (13) is installed in side within the heat tracing stove furnace shell (14).
Heat tracing stove furnace shell (14) is the tubular spare with sheet metal system.Be installed on the drop-bottom (8) side outside the insulation material (13).
Upper cover plate (15) is a big steel plate of ring-type, and middle macropore is greater than shell ceramic core (21) external diameter, installation coaxial with it.And be on the heat tracing stove furnace shell (14).
It is the cylindrical member made from sheet metal that core gives hot stove furnace shell (16), is installed on the upper cover plate (15), keeps coaxial with shell ceramic core (21).
Insulation material (17) is installed in core and gives side within the hot stove furnace shell (16).
Calandria (18) is installed in side within the insulation material (17) for resistance wire (or silicon carbon-point).
It is a big ring-type steel plate that core gives hot stove bell (19), and internal diameter is greater than shell ceramic core (21), and coaxial with it installation is in the top that core gives hot stove furnace shell (16).
Interior rotary funace (20) is made up of Cylinder shape body of heater made from refractory material and the resistance wire (or silicon carbon resistance element or acetylene flame) that is mounted thereon.Be installed on the central vertical shaft (39), its position is within the shell ceramic core, and the width of cloth is penetrated on the baffle plate (32).When center vertical axis (39) back and forth rotated slowly, interior rotary funace (20) is followed together motion, and was even in order to temperature.
Shell ceramic core (21) have relatively thin wall thickness and stronger thermal conductivity in case under the cooling medium effect fast cooling.In aluminium vanadine powder, increased graphite powder or in aggregate, increased clipped wire when the coremaking for reaching this purpose.Or adopt wire netting so that increased thermal conductivity and intensity.Shell ceramic core (21) outer surface has geometries such as horizontal, vertical groove and hole, garden so that make various special-shaped tubular large thin-wall elements in addition.
Stick harness bar (22) is the garden rod that refractory material is made.Storage aluminium crucible (23) is installed in aluminium water and stores and filter on the stove.
Wherein a certain amount of aluminum alloy melt to be filtered of contain (24) is placed in and filters on the crucible (26).Calandria (25) is a resistance wire, is centered around around storage aluminium crucible (23) and the filtration crucible (26).
Aluminium vanadine particle (27) is contained in and filters in the crucible (26)
Conduit (28) is made with refractory material, and its effect is that the liquid aluminum alloy after filtering is imported in the crucible (10).
Conduit calandria (29) is a resistance wire, is set in the conduit (28) to avoid aluminium liquid.
Thermocouple group (30) is a lot of thermocouples.Be installed in the following exit of crystallizer (7).On the cylinder of the outer garden of crystallizer (7), square near the same level height the bottom surface, wait square from brill on many apertures, these thermocouples are assigned into the inside, and the cold junction of these thermocouples is connected in the same electronic computer.So that select wherein maximum millivolt number (promptly representing maximum temperature) at any time.
Liquid aluminum alloy (31) in the die cavity is positioned at the top of the die cavity that crystallizer (7) and shell ceramic core (21) formed.
The width of cloth is penetrated baffle plate (32) and is made by insulating refractory, for example makes with the waterglass bonding with alumina silicate fibre and glass fiber etc.Shape such as garden plate, middle porose, be installed on the central vertical shaft (39), be on the same horizontal plane with liquid-solid boundary (34), between interior rotary funace (20) and intercooler (2).The heat width of cloth in the heat tracing stove that its role is to avoid top is penetrated and is transmitted to following cooling zone, to obtain bigger thermograde.
Core print (33) is the garden circle made from heat resisting steel, its external diameter is identical with shell ceramic core (21), endoporus assembles to guarantee the accurate of its installation with the jut phase-splitting of drawing on the base (1), a lot of screws are arranged in addition, so that from interior hexagonal counter-sunk screw it and the garden dish of drawing base (1) being fixed together down on it.One circle nail riveting is arranged in the above thereon, firm the condensing in together of these nails energy during coremaking with shell ceramic core (21), its structure is as shown in Figure 5.
Liquid-solid boundary (34)
Base plate (35) is a tetragonal thick heat-resisting steel sheet and plate, have five holes on it, centre bore and draw base (1) and be locked together has a hole on each angle, be assembled together with four vertical pillars (36) respectively, to guarantee that drawing base (1) moves up and down along vertical line.
Vertical pillars (36) is a heat resisting steel fine finishining feed rod.Amount to four, its lower end all assigns in the locating hole of machinery bed, and its upper end all assigns in the locating hole of heat tracing stove drop-bottom (8), and with the locking of king bolt cap, is installed in four holes of base plate (35) in the middle of it.Its effect has two: one, and supporting entire machine, the 2nd guarantees that drawing base (1) moves up and down along vertical line.
Central vertical shaft (39) reaches 8 meters, vertically be installed in the center of shell ceramic core (21), by drawing the centre bore of base (1), be installed in two sliding bearings up and down of base (being reduction box) of its lower end, about 2 meters of two bearing phase squares, purpose are to keep this stabilizer shaft degree and perpendicularity.This top is installed in the bearing on the horizontal cover plate (38).On inner this axle of base, be equipped with and practice wheel, drive, make it back and forth to rotate lentamente with practicing bar.Be equipped with on this axle of mid portion: interior rotary funace (20), the width of cloth are penetrated baffle plate (32), intercooler (2).This center is porose, can import the interior in succession rotary funace (20) of power line from top to down, and from bottom to top imports cooling medium supply intercooler (2).
The effect of horizontal cover plate (38) and support (37) is the last spindle nose position of fixed center vertical axis (39), to guarantee this perpendicularity.Horizontal cover plate (38) is the garden plate-like, and there is sliding bearing at its center, so that assemble mutually with central vertical shaft (39), support (37) is a foundry goods, and its structure is for respectively there being a big garden ring up and down, and the centre has three plates that they are bound up.With screw and shop bolt they and drop-bottom (8) are linked together, become a space frame.
Method of operating
1. above-mentioned various firing equipments are all started, the equipment each several part of making all reaches the temperature of regulation.2. mention stick harness bar (22), aluminum alloy melt (24) is entered in crucible (10) and the crystallizer (7) through after filtering, go up end in contact with extraction catheter (3) and go forward side by side in the dovetail groove (4).3. start intercooler (2) and inner rotary cooler (6), extraction catheter (3) and shell ceramic core (21) all are cooled, end and the liquid aluminum alloy that enters dovetail groove (4) also are cooled and solidify one deck on extraction catheter (3), and the aluminium that this moment, this one deck solidified has been fixed on extraction catheter (3) by the aluminium in the dovetail groove and has gone up.When the aluminium that solidifies when this one deck further was increased to certain thickness, when the maximum temperature of indication reached a certain numerical value among the thermocouple group (30), the electronic computer follow procedure started the draw-gear of drawing base (1).It is together downward to draw base (1), extraction catheter (3), shell ceramic core (21), foundry goods bottom (5) under the drive of draw-gear, shifts to outside the crystallizer (7), and the device that continues to be cooled cools off.Electronic computer is gathered the highest millivolt number among the thermocouple group (30) at any time, and follow procedure is regulated heater of the present invention (supply voltage), cooling device (kind of cooling medium and quantity), draws factor such as speed, just can be reached the purpose that successfully realizes missile bay body continuous directional solidification precision casting this highest millivolt numerical control in a certain scope.
Embodiment two as shown in Figure 2.Comparison diagram 2 and Fig. 1 are visible, and both are similar.Difference is that the crystallizer of embodiment two is made up of promptly two parts: top graphite crystallizer (7) and following ceramic crystallizer (42), crystallizer heating furnace (9) also changes high-frequency heating in addition.So drop-bottom (8), heat tracing stove furnace shell (14), upper cover plate (15), core give hot stove furnace shell (16), core and give that hot stove bell (19), horizontal cover plate (38), support (37) are all corresponding takes anti-eddy current measure on the basis of embodiment one, promptly be riveted together with steel plate and bakelite plate, make above-mentioned part, for example for heat tracing stove furnace shell (14), in embodiment one, system is welded into tubular spare with monoblock sheet metal volume and gets final product, handy in the present embodiment several sheet metals and several thin bakelite plates are riveted together, and rivet into tubular more.For fear of the generation of eddy current, interior rotary funace (20), calandria (12), calandria (18) all need be used the carbon silicon rod heating instead in addition.In addition, inner rotary cooler (6) is changed into pond rotation cooling medium, its rotary power is mainly from rotating spoon (43), intercooler is made up of three parts: pond shape cooler (40), cooling medium replensiher (41), it installs purpose is constantly to replenish cooling medium to pond shape cooler (40) rotatably, in order to avoid shell ceramic core (21) internal temperature rises, cooling effect descends.And intercooler (2), it is still a red copper pipeloop and makes, and there is 1～2 row's aperture in the outside, so that spray cooling medium to shell ceramic core (21).Cooling medium can adopt water or frozen water or cooling agent (water+ice cube+salt) or tin liquor.
Embodiment three
Its equipment as shown in Figure 6, it is to make on the basis of embodiment two (seeing the 2nd figure) as seen from the figure, the difference of it and embodiment two is the graphite crystallizer (7) on embodiment two equipment, ceramic crystallizer (42) and crystallizer heating furnace (9) are taken off, crucible (10) is reduced, and be placed on the drop-bottom (8), below it, install electromagnetic crystallizer (45) (electromagne tic mold) [9] [7] and shielding device (44).Cast(ing) surface is cooled off by inner rotary cooler (6) when this equipment work, the surface is cooled off by intercooler (2) within the shell ceramic core (21), has solidified foundry goods bottom (5), and on it some liquid aluminium alloy under the effect of electromagnetic force moulding but ot-yet-hardened, can be referred to as the liquid part (46) of foundry goods, it does not contact with any other solids, just under electromagnetic force and surface tension effects, keeping bright and clean garden cylinder, solidifying back fineness and can reach
6
New development (one) " material engineering " the 6th phase of nineteen ninety [2] directional solidification of list of references [1] directional solidification and single crystal casting technology and peace pavilion English chief editor China Machine Press [4] " Solidification technology " of new development (two) " material engineering " [3] " foundry goods forms theory " in 1991 Harbin Institute of Technology of single crystal casting technology
J J Burke Ohio1974[5] a kind of continuous casting process (O, C, C method) Xing Jiandong " (foundry engieering " 1985.6[6 of novelty] adopt sincere U.S. in the OCC big open country of process exploitation new product " light-alloy process technology " 1991 Vo19No3[7] the electromagnetic forming casting influences Zhao Binan [8] patent US 3646988[9 to aluminium alloy casting surface quality and cast sturcture] US 4,567,936[10] SU 438490
Claims (10)
1. a special-shaped tubular large thin-wall element continuous directional solidification precision casting technology is as follows: at first calandria (12), calandria (18), crystallizer heating furnace (9) and core internally heated oven send electrical heating, the heat tracing stove is all reached everywhere give fixed temperature, the good liquid metals of refining is cast in the crucible (10), enter by crystallizer (7), core, in the die cavity that the top three of extraction catheter (3) is formed, start cooling device this moment, liquid aluminum alloy bottom in extraction catheter (1) and the die cavity is cooled, the layer of aluminum alloy has been solidified on top at extraction catheter (1), after the measured millivolt of thermocouple number reaches certain numerical value, start and draw base (1) traction extraction catheter (3) and foundry goods bottom (5) gradually by drawing in the crystallizer (7), be further cooled, it is characterized in that: the moulding of continuous directional solidification method or electromagnetic crystallizer continuous casting process is adopted on the surface outside foundry goods, heating, the type of cooling, and the moulding of the directional solidification precision casting of surface employing within it method, heating, the type of cooling.
2. special-shaped tubular large thin-wall element continuous directional solidification precision casting equipment, mainly form by the core in crystallizer (7), crystallizer heating furnace (9), crucible (10), calandria (12), the crystallizer, the heating furnace in the core, the outer cooler around the foundry goods, it is characterized in that in crystallizer (7) or electromagnetic crystallizer (45), a shell ceramic core (21) being arranged, an intercooler (2) is arranged in shell ceramic core (21), in intercooler (2), a central vertical shaft (39) is arranged, supporting intercooler (2) and other parts.
3. equipment according to claim 2 is characterized in that intercooler (2) is with back and forth rotation of speed slowly.
4. equipment according to claim 2 is characterized in that intercooler (2) fixes.
5. equipment according to claim 2 it is characterized in that in crystallizer (7) or electromagnetic crystallizer (45) a shell ceramic core (21) being arranged, and it has bigger thermal conductivity.Groove and garden hole is arranged anyhow in its surface so that on surface within the foundry goods, form shape such as reinforcement and boss chess piece anyhow.
6. according to claim 2 or claim 3,4 described equipment, it is characterized in that a central vertical shaft (39) being arranged at the center of intercooler (2), supporting the intercooler (2) and the width of cloth penetrate baffle plate (32) and in rotary funace (20).
7. according to claim 2 or the described equipment of claim 6, it is characterized in that in shell ceramic core (21) having a width of cloth to penetrate baffle plate (32) and be installed on the central vertical shaft (39), be positioned on the intercooler (2).
8. according to claim 2 or the described equipment of claim 6, it is characterized in that in shell ceramic core (21), an interior rotary funace (20) being arranged, be installed on the central vertical shaft (39), follow it and together back and forth rotate.Being positioned at the width of cloth penetrates on the baffle plate (32).
9. equipment according to claim 2 is characterized in that around foundry goods, and inner rotary cooler (6) is installed, and its level height is lower than intercooler (2) certain distance.
10. equipment according to claim 2 is characterized in that exit under crystallizer (7), and device has thermocouple group (30), and its cold junction is imported same computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95103050A CN1063365C (en) | 1995-03-30 | 1995-03-30 | 'Continuous directional solidifying precision casting process and appts. for shaped cylinder-shape thin wall piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95103050A CN1063365C (en) | 1995-03-30 | 1995-03-30 | 'Continuous directional solidifying precision casting process and appts. for shaped cylinder-shape thin wall piece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1132127A true CN1132127A (en) | 1996-10-02 |
| CN1063365C CN1063365C (en) | 2001-03-21 |
Family
ID=5074578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95103050A Expired - Fee Related CN1063365C (en) | 1995-03-30 | 1995-03-30 | 'Continuous directional solidifying precision casting process and appts. for shaped cylinder-shape thin wall piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1063365C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102463322A (en) * | 2010-11-15 | 2012-05-23 | 贵州安吉航空精密铸造有限责任公司 | Method for improving quality of investment precision cast shuttering |
| CN103433431A (en) * | 2013-09-06 | 2013-12-11 | 安徽应流集团霍山铸造有限公司 | Ceramic core for inner cavity of cylinder cover |
| CN104668683A (en) * | 2015-01-13 | 2015-06-03 | 哈尔滨东安实业发展有限公司 | Vertical indexing mechanism and thin wall special-shaped part machining method through same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH641985A5 (en) * | 1979-08-16 | 1984-03-30 | Sulzer Ag | METHOD FOR THE PRODUCTION OF DIRECTLY SOLID CASTING PIECES. |
| CN1046106C (en) * | 1991-08-15 | 1999-11-03 | 李忠炎 | Casting technology and equipment for thin-wall piece casting |
-
1995
- 1995-03-30 CN CN95103050A patent/CN1063365C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102463322A (en) * | 2010-11-15 | 2012-05-23 | 贵州安吉航空精密铸造有限责任公司 | Method for improving quality of investment precision cast shuttering |
| CN103433431A (en) * | 2013-09-06 | 2013-12-11 | 安徽应流集团霍山铸造有限公司 | Ceramic core for inner cavity of cylinder cover |
| CN103433431B (en) * | 2013-09-06 | 2016-08-31 | 安徽应流集团霍山铸造有限公司 | The ceramic core of cylinder head inner chamber |
| CN104668683A (en) * | 2015-01-13 | 2015-06-03 | 哈尔滨东安实业发展有限公司 | Vertical indexing mechanism and thin wall special-shaped part machining method through same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1063365C (en) | 2001-03-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Sahu et al. | Fabrication of aluminum matrix composites by stir casting technique and stirring process parameters optimization | |
| CN102277505B (en) | Method for purifying high-pure aluminum by directional solidification and smelting furnace used in same | |
| CA1094824A (en) | Process for the manufacture of abrasive material | |
| CN103031463B (en) | Device and method for preparing nanometer ceramic particle-reinforced aluminum-based composite | |
| CN102240861B (en) | Method and equipment for manufacturing gradient functional structure | |
| CN105772663B (en) | A kind of coupled stir technology prepares the device and method of homogeneous ingot casting | |
| CN102240860A (en) | Method and equipment for manufacturing gradient material mould | |
| CN106282620B (en) | A method of there is diffusion-type composite solidification tissue Al-Bi alloy by addition nucleating agent preparation | |
| CN110453117A (en) | A kind of high-performance A356 alloy refining and strenthen-toughening mechanizm process | |
| CN104741552A (en) | Device and method for preparing large-specification ultrahigh-strength aluminum alloy continuous ingots | |
| KR20210091272A (en) | Equipment for the production of semi-solid slurry | |
| CN1063365C (en) | 'Continuous directional solidifying precision casting process and appts. for shaped cylinder-shape thin wall piece | |
| CN102179637A (en) | Manufacturing method and equipment of unequal-section bimetal transmission part | |
| CN101596590B (en) | Method for inhibiting large steel ingot from macrosegregation by mechanical stirring | |
| CN1287930C (en) | Water cooling electromagnetic copper type directional solidification method of titanium base alloy | |
| CN115572883A (en) | Preparation method of SiCp reinforced aluminum-based composite material for stirring casting | |
| CN111943698B (en) | Surface layer refractory material of precision casting wax mould | |
| CN101979186A (en) | Method for controlling graphite distortion of large-sized nodular iron casting | |
| CN105014044B (en) | A kind of refractory metal coating ceramic chip material and preparation method thereof | |
| CN1117899A (en) | Continuous directional solidification precision casting technology for large tube-like thin-wall component and equipment thereof | |
| CN210908017U (en) | Electromagnetic multi-cyclone stirring casting device | |
| CN101736215B (en) | Preparation method of Mg/SiCp composite material | |
| CN104985159B (en) | A kind of die casting equipment and method for producing refractory metal coating ceramic chip material | |
| CN210115449U (en) | Thermal simulation device for large cast ingot solidification structure based on high-throughput experiment | |
| CN110681836A (en) | Electromagnetic multi-cyclone stirring casting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |