CN1110386C - Technology and apparatus for making jet-type centrifugal rotary mould of great non-crystal ring parts - Google Patents

Abstract

The present invention provides a technology for making great non-crystal ring-shaped parts and an apparatus realizing the technology. The technology mainly comprises the following steps: firstly, alloy is melted, and heat insulation is carried out; then, liquid alloy is jetted; finally, the liquid alloy is shaped and solidified in a rotary mold under the action of centrifugal force, great non-crystal ring-shaped parts are formed, etc. The apparatus is composed of an alloy melting and jetting system, a rotary mold combination and rotation system, and a vacuum and inflation pressure control system. The present invention has the advantages that one-time shaping is realized, the processes are reduced, and the efficiency is enhanced.

Description

A kind of jet-type centrifugal rotary mould of great non-crystal ring parts manufacturing process and equipment

Technical field

The present invention relates to a kind of large block amorphous method for manufacturing parts of ring-type, the liquid alloy of fusing is injected in the revolving die, utilize centrifugal force and revolving die quick conductive to form amorphous annular element, comprise the device of one group of technology and this technology of realization.

Background technology

Large block amorphous being meant by appropriate design of alloy obtains very strong alloy intrinsic amorphous formation ability, and then prepares three-dimensional dimension all at the amorphous bulk of the above magnitude of millimeter by certain technological process and means.Large block amorphous have an outstanding performance, and for example therefore high strength, high resiliency, high abrasion and high anti-corrosion etc. can both be applied in a lot of fields.The large block amorphous method of preparation has several methods such as shrend, suction pouring, jet moulding and directional solidification at present, and the sample of preparation or part mostly are garden rod or plate, owing to be subjected to the restriction of alloy amorphous formation ability, the thickness of non-boule diameter or plate is smaller usually.Utilizing above-described preparation method to make the large block amorphous part of ring-type also needs follow-up technical process, and for example plastic deformation or the non-crystal bar machined by the amorphous plate prepares ring-type amorphous part, and these two kinds of methods all have complex process, shortcoming that cost is high; Even more serious is that the method for plastic deformation must heat the amorphous plate, if technology controlling and process sternly is not easy to cause the crystallization of amorphous, thereby causes the amorphous part to be scrapped; Non-crystal bar is processed into annular element, its annular element diameter is subjected to non-crystal bar diameter restrictions, because alloy amorphous formation ability is limit, the diameter of non-crystal bar can not be very big, the annular element diameter of therefore this method preparation also can not be very big, and machined causes a large amount of alloys to become scrap, reduced stock utilization.The large block amorphous supercooling liquid phase region in northeastern Japan university investigation of materials place utilizes pressing method to prepare annular gear wheel part (Acta Metallurgica V46,1998, p253-263), it is better that this method is used to have the large block amorphous effect in wide supercooling temperature interval, but for narrower large block amorphous in supercooling temperature interval, stirring of temperature is enough to cause crystallization and causes large block amorphous part to be scrapped in the extrusion process, therefore very strict to temperature controlling requirement in the technical process, this will increase manufacturing cost greatly; What is more important, hot-extrusion method are difficult to prepare the large block amorphous annular element of hollow.

Summary of the invention

The object of the present invention is to provide a kind of device for preparing the technology of large block amorphous annular element and realize this technology.To realize once-forming, reduce operation, raise the efficiency.

Technology of the present invention constitutes: comprise alloy melting and insulation, liquid alloy spray, liquid alloy under centrifugal action in revolving die moulding solidify and form three main processes such as the large block amorphous part of ring-type.Processing step is as follows:

Bulk amorphous alloys is placed the tubulose crucible, and the crucible internal diameter is between 5 to 40 millimeters, and it depends on the size of the large block amorphous part of ring-type that will prepare; Utilize eddy-current heating fusing bulk amorphous alloys, and be incubated 2 to 10 minutes after being superheated to above 10 to the 300 degree scopes of alloy melting point temperature.Tubulose crucible bottom has aperture, and it is used as the liquid alloy nozzle bore, and the nozzle bore diameter is at 0.5 to 5 millimeter, and it depends on the melted alloy amount, and nozzle bore seals with a rotatable baffle plate; A crucible top and a pneumatic supply are connected, after alloy solution is superheated to more than the melting temperature 10 to 300 degree scopes and is incubated 2 to 10 minutes, flap shutter, open crucible bottom nozzle bore, open pneumatic supply joint valve simultaneously, the alloy liquid of fusing is extruded by pressed gas, sprays in the metal pattern die cavity of rotation at a high speed, and liquid alloy forms the large block amorphous part of ring-type under centrifugal action.The diameter of the large block amorphous part of ring-type, thickness and width are respectively by revolving die size and the control of the alloy amount that sprays into.

Equipment of the present invention is by the fusing and the injection system of alloy; Combination revolving die and rotation system; Vacuum and the blowing pressure control system three parts are formed.The fusing of its alloy and injection system are made up of induction coil (2), baffle plate (3), turning cylinder (4), rotating shaft (5), crucible nozzle bore (14), electrode (15), crucible (16), interface (17), air valve (18) and an intermediate frequency power supply, and intermediate frequency power supply links to each other with electrode (15).Combination revolving die and rotation system are made of revolving die cavity (6), revolving die pedestal (8), motor (9), rotating shaft (10), combination revolving die (12), screw (13).The blowing pressure control system is made up of bleed interface (1), closed cavity (7), inflation interface (11), cavity wall (19) and one group of vacuum unit and pressure cylinder of system vacuum, vacuum unit and pressure cylinder are industrial standard spare, pressure cylinder stores argon gas or helium as the inertia source of the gas, the vacuum unit links to each other with vacuum suction interface (1), and pressure cylinder links to each other with inflation interface (11).

The invention has the advantages that and adopt directly spray to cast one-shot forming behind the alloy melting, so operation is few, the production efficiency height can make the large block amorphous part of ring-type expeditiously, and the diameter of annular element is unrestricted; In the non-crystaline amorphous metal process of setting, because action of centrifugal force, make to keep contacting closely between the metal pattern of liquid alloy and rotation that the liquid alloy cooling velocity is fast, helps forming large block amorphous; In addition, the method and apparatus structure that the present invention adopts is simple especially, does not need follow-up plastic working; Revolving die structure and fusing spray to cast system are done change slightly, can make large block amorphous pipe.

Description of drawings

The present invention is further described below in conjunction with accompanying drawing.

Fig. 1 is the core texture profile of jet-type centrifugal rotary mould of great non-crystal ring parts manufacturing installation of the present invention.(1) is the system vacuum interface of bleeding, links to each other with the vacuum unit.(2) be the induction coil of melted alloy, form by the copper pipe coiling of hollow, logical recirculated cooling water in the copper pipe, induction coil links to each other with electrode on being installed in vacuum cavity.(3) be the baffle plate of crucible nozzle, its end is close to the crucible nozzle bore, and nozzle bore is played sealing function; The other end links to each other with a turning cylinder (4), and plays sealed crucible nozzle bore and the effect of opening the crucible nozzle bore with the rotation of turning cylinder (4).(4) be can left-right rotation axle, its end links to each other with baffle plate (3), the other end links to each other with rotating shaft (5) by gear, drives the rotation of rotating shaft (4) by rotating shaft (5), thereby realizes the sealing and the opening action of crucible nozzle bore.(6) be the revolving die cavity, its diameter and the outer ring diameter and the axial height that have highly determined the large block amorphous part of ring-type.(7) be closed cavity, this cavity has guaranteed that the fusing of alloy and injection system and combination revolving die and rotation system are operated in vacuum or the protective atmosphere.(8) be the revolving die pedestal, it is cooled off by recirculated water, and the lower end links to each other with rotating shaft (10), and combination revolving die (12) is installed above.(9) be motor, drive revolving die by it by rotating shaft (10) and rotate, regulate the revolving die rotating speed by regulating rotating speed of motor, thereby regulate the size of centrifugal force.When passing through cavity wall, rotating shaft (10) adopts movable sealing.(11) be the vacuum cavity intake interface, it links to each other with an inertia source of the gas, after chamber vacuum is extracted into the 10-5 holder, can charge into inert protective gas by intake interface (11) during work.(12) be the combination revolving die, it is installed on the revolving die pedestal (8) by screw (13), and its inner cavity size has determined the outer ring diameter and the axial height of the large block amorphous part of ring-type.Combination revolving die (12) is a field replaceable unit, according to the needs of making the large block amorphous part of different size ring-type, changes the combination revolving die of different inner cavity sizes.(14) be the crucible nozzle bore, it is a diameter at 0.5 to 5 millimeter aperture, opens the bottom at crucible, and seals or open by baffle plate (3).The diameter of nozzle bore depends on the size of what or the large block amorphous part of ring-type of liquid alloy amount, and a part hour nozzle bore diameter takes off limit.(15) be electrode, link to each other with induction coil (2) in the logical vacuum cavity of its end that the other end links to each other with intermediate frequency power supply.(16) be crucible, its internal diameter depends on the size of the large block amorphous part of ring-type that will prepare between 5 to 40 millimeters, internal diameter capping when part is big.The crucible bottom has nozzle bore (14), and the upper end links to each other with an inertia source of the gas.Crucible axis to the axial angle of inclination of revolving die be 20 °～50 °.(17) be external indifferent gas source interface, can in crucible, import 5 to 10 atmospheric inert gases, realize liquid alloy spray action by interface (17).(18) be air valve, play the on-off action of sealing and importing high-pressure inert gas.(19) be the vacuum chamber body wall, form the cavity (7) of a sealing by it, it also is the skeleton of this device simultaneously, and each parts keep relative annexation by it.

The device that the present invention relates to except core texture shown in Figure 1, also comprises a cover vacuum unit, an intermediate frequency power supply and a high pressure inertia source of the gas, and they can adopt standard industry equipment.Wherein the vacuum unit links to each other with vacuum suction interface (1); Intermediate frequency power supply links to each other with electrode (15); High pressure inertia source of the gas links to each other with inflation interface (11).

The specific embodiment

Embodiment:

At first foundry alloy is put into crucible during this device work, by interface [1] system is vacuumized, vacuum charges into an atmospheric argon gas or helium by interface (11) after reaching the 10-5 holder; Open intermediate frequency power supply heat fused alloy then, temperature is incubated 5 to 10 minutes after reaching above 10 to the 300 degree scopes of alloy melting point temperature; Flap shutter (3) is opened crucible bottom nozzle bore (14), and open simultaneously and save valve (17), make crucible and five to ten atmospheric argon gas connect, liquid alloy in the crucible is under five to ten atmospheric pressure, spray from nozzle bore (14), and inject the combination revolving die (12) of rotation at a high speed, at centrifugal action retrofilling revolving die die cavity (6) and solidify and form the large block amorphous part of ring-type.The revolving die pedestal adopts the recirculated water cooling, to increase the cooling velocity of liquid alloy; The diameter of the large block amorphous part of ring-type and axial height are by the size Control of combination revolving die (12), and the radial thickness of large block amorphous part is by the liquid alloy amount control of injecting.The manufacturing diameter is that D, axial height are that H, radial thickness are that the liquid alloy volume V that the large block amorphous part of the ring-type of δ needs is calculated as follows:

β one comprises the loss of manufacture process alloy and solidifies flexible coefficient, β=1.02～1.06 in V=π β δ H (D-δ) (1) (1) formula.The manufacturing diameter is a D (unit: cm), proportion is d (unit: N/cm ³) large block amorphous annular element the time, the minimum speed n of revolving die (unit: rev/min) is calculated as follows: $n=\frac{8000}{\sqrt{\mathrm{dD}}}---\left(2\right)$

Claims (4)

1, a kind of jet-type centrifugal rotary mould of great non-crystal ring parts manufacturing process is characterized in that: technology constitute comprise alloy melting and insulation, liquid alloy spray, liquid alloy under centrifugal action in revolving die moulding solidify and form three main processes such as the large block amorphous part of ring-type; Processing step is: bulk amorphous alloys is placed the tubulose crucible, and the crucible internal diameter is between 5 to 40 millimeters, and it depends on the size of the large block amorphous part of ring-type that will prepare; Utilize eddy-current heating fusing bulk amorphous alloys, and be incubated 2 to 10 minutes after being superheated to above 10 to the 300 degree scopes of alloy melting point temperature.Tubulose crucible bottom has nozzle bore, and the nozzle bore diameter is at 0.5 to 5 millimeter, and it depends on the melted alloy amount, and nozzle bore seals with a rotatable baffle plate; A crucible top and a pneumatic supply are connected, after alloy solution is superheated to more than the melting temperature 10 to 300 degree scopes and is incubated 2 to 10 minutes, flap shutter, open crucible bottom nozzle bore, open pneumatic supply joint valve simultaneously, the alloy liquid of fusing is extruded by pressed gas, sprays in the combination revolving die die cavity of rotation at a high speed, and liquid alloy forms the large block amorphous part of ring-type under centrifugal action; The diameter of the large block amorphous part of ring-type, thickness and width are respectively by revolving die cavity dimension and the control of the alloy amount that sprays into; The forming process of bulk amorphous alloys fusing, insulation and spray and large block amorphous annular element all is to carry out under inert gas shielding.

2, according to claim 1 described technology, it is characterized in that: the liquid alloy volume computing formula of making the large block amorphous part needs of ring-type of specific dimensions is: V=π β δ H (D-δ); The minimum mould rotating speed computing formula that the large block amorphous annular element of manufacturing particular alloy needs is: $n=\frac{8000}{\sqrt{\mathrm{dD}}},$ Wherein, B one comprises the loss of manufacture process alloy and solidifies flexible coefficient, and D is for making diameter, and δ is a radial thickness, and H is an axial height, and d is a proportion, and n is a rotating speed.

3, a kind of equipment of making jet-type centrifugal rotary mould of great non-crystal ring parts is characterized in that: by the fusing and the injection system of alloy; Combination revolving die and rotation system; Vacuum and the blowing pressure control system three parts are formed; The fusing of its alloy and injection system are made up of induction coil (2), baffle plate (3), turning cylinder (4), rotating shaft (5), crucible nozzle bore (14), electrode (15), crucible (16), interface (17), air valve (18) and an intermediate frequency power supply, and intermediate frequency power supply links to each other with electrode (15); Combination revolving die and rotation system are made of revolving die cavity (6), revolving die pedestal (8), motor (9), rotating shaft (10), combination revolving die (12), screw (13); The blowing pressure control system is made up of bleed interface (1), closed cavity (7), inflation interface (11), cavity wall (19) and one group of vacuum unit and pressure cylinder of system vacuum, the vacuum unit links to each other with vacuum suction interface (1), and pressure cylinder links to each other with inflation interface (11).

4, device according to claim 3 is characterized in that there is a nozzle bore (14) alloy melting crucible bottom, and nozzle bore (14) adopts rotatable baffle plate (3) sealing in the fusing of alloy and insulating process; The crucible top is connected with a high pressure 5～10 atmospheric pressure inertia source of the gas (17); Combination revolving die (12) is made up of one group of metal pattern, the large block amorphous diameter of part of size Control and the axial height of combination revolving die die cavity (6); Combination revolving die (12) is connected with a rotating shaft (10) by revolving die pedestal (8); Crucible axis to the axial angle of inclination of revolving die be 20 °～50 °, nozzle bore (14) is closed by baffle plate (3) in the fusing of alloy and insulating process, during spray to cast, in case air pressure valve (18) and nozzle bore (14) are opened, just can finish continuous spray to cast process; The bulk amorphous alloys solution of fusing directly injects the combination revolving die of rotation at a high speed from the ejection of crucible nozzle bore, and forms the large block amorphous part of ring-type.

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