WO2014163522A1 - Installation de coulée verticale à centrifuge sous vide et tuyau de coulée pour cette installation (et variantes) - Google Patents

Installation de coulée verticale à centrifuge sous vide et tuyau de coulée pour cette installation (et variantes) Download PDF

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Publication number
WO2014163522A1
WO2014163522A1 PCT/RU2013/000276 RU2013000276W WO2014163522A1 WO 2014163522 A1 WO2014163522 A1 WO 2014163522A1 RU 2013000276 W RU2013000276 W RU 2013000276W WO 2014163522 A1 WO2014163522 A1 WO 2014163522A1
Authority
WO
WIPO (PCT)
Prior art keywords
gate
flask
channel
cavity
spiral
Prior art date
Application number
PCT/RU2013/000276
Other languages
English (en)
Russian (ru)
Inventor
Александр Дмитриевич РУДЕНКО
Original Assignee
Rudenko Aleksandr Dmitrievich
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rudenko Aleksandr Dmitrievich filed Critical Rudenko Aleksandr Dmitrievich
Priority to RU2013129498/02U priority Critical patent/RU136374U1/ru
Priority to PCT/RU2013/000276 priority patent/WO2014163522A1/fr
Publication of WO2014163522A1 publication Critical patent/WO2014163522A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
    • B22D13/101—Moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • 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
    • B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould

Definitions

  • the present invention relates to foundry and relates to the design of a vertical centrifugal vacuum foundry.
  • the installation is completely based on investment casting technology, with some technical additions, and is intended to improve and possibly predict and expand the casting range of multilayer, composite materials.
  • an installation is considered that provides high productivity, economy, prediction of the casting process, and work in program control.
  • WO 2011110137, B22D13 / 00, B22D19 / 06, B22D19 / 16, publ. 11/15/2011 1 a method for the production of bimetallic and multilayer castings by gravity or centrifugal casting is described, in which at least two different materials are gradually introduced into the mold. Before casting the second material (metal), the flame is fed into the mold, in which all oxygen is completely burned out, and the concentration of possible oxides is intensively reduced on the surface of the layer of previously supplied material.
  • a centrifugal injection machine in which a support plate is located on a rotating plate, on which a number of closed casting molds are placed, each of which consists of two parts and which are located around the axis of rotation.
  • the apparatus is closed from above by a lid with air-ventilation openings and a central hole, through which metal is fed into the central gate and further into the gate channels.
  • the metal enters through the inlet of the main gate and fills the central part of the channel, due to its inertness, the metal rotates relatively slower than the walls of the injection molds.
  • the rotational speeds at the location of the holes leading to the gate channels and the central part of the gate are different.
  • Metal from various sections of the central gate is supplied to the openings of the gate channels, as a result of which the metal particles are mixed, and the metal under pressure enters the gate forms through radial gate channels.
  • the channels are opened directly into the molds due to the centrifugal effect, the metal under pressure enters the molds at a high speed and completely fills them with a uniform density of the metal.
  • a centrifugal casting device comprising a housing in which a perforated flask is mounted, a bearing support, a rotation drive, the housing is in communication with a vacuum system, and the flask is made with a flange that is placed between the bearing supports mounted on the housing.
  • a centrifugal casting device comprising a housing in which a perforated flask is mounted, a bearing support, a rotation drive, the housing is in communication with a vacuum system, and the flask is made with a flange that is placed between the bearing supports mounted on the housing.
  • a centrifugal casting device with a vertical axis of rotation in which the gating channels are made in the form of a logarithmic spiral, the cross-section of the gating channel is reduced from the axis of rotation, and the cross-sectional area of the metal receiver is equal to the sum of the input sections of the gating channels. Due to this design, it is possible to reduce hydrodynamic losses, to eliminate the possible occurrence of vortices.
  • a device for centrifugal pouring is disclosed, the main injection channel of which is made in the form of a helical line, the channel direction being combined with the direction of rotation of the rotor disk, and the sprue inlets in the mold cavity are located on the wall of the main sprue channel farthest from the axis rotor disk rotation. Adopted as a prototype for the object - gate.
  • This sprue accelerates the flow of molten metal, but does not provide for the conversion of a turbulent metal flow into a laminar one.
  • the present invention is aimed at achieving a technical result, which consists in increasing the efficiency of operation due to the guaranteed positioning of the flask relative to the axis of rotation of the housing and ensuring the quality of castings due to conversion when filling forms of a turbulent metal flow into a laminar one.
  • a vertical centrifugal-vacuum foundry installation comprising a rotary drive equipped with a rotary drive mounted support disk, on which a housing is mounted, in the cavity of which there is a cylindrical flask with perforated holes in the side wall, while the cavity of the housing is in communication with evacuation system, and the casing is equipped with a cover with an exhaust valve and with a neck for pouring melt, the casing and the lid are equipped on the inside with a multilayer thermal insulation a coating, and the sprue is located along the vertical axis of the flask, equipped with a cooling system with guides of the receiver’s air ducts and a forced cooling blower, a shell with vertically mounted guides for the flask, which simultaneously serve as forced cooling blades, is placed in the cavity of the housing directly along the multilayer heat-insulating coating, the cavity between the shell and the flask is in communication with the cooling system, and in the flask cavity along its vertical a sprue is installed
  • the specified technical result is achieved by the fact that in the sprue for a vertical centrifugal-vacuum foundry installation, in which the main injection channel is made in the form of a helical spiral line, the main injection channel is made single-channel and conical, tapering in the direction from the filler neck to the outlet.
  • the specified technical result is achieved by the fact that in the sprue for a vertical centrifugal-vacuum foundry installation in which the main injection channel is made in the form of a helical line, the main injection channel is made in the form of two channels, each channel is made conical, tapering in the direction from the fill neck to the outlet, while the direction of the spiral of one channel is opposite to the direction of the spiral of another channel.
  • FIG. 1 is a cross section of a casting centrifugal-vacuum installation with a lid and a flask;
  • FIG. 2 is a plan view of a casting centrifugal vacuum installation of FIG. 1, with the cover removed;
  • FIG. 3 is a cross-section of a casting centrifugal-vacuum installation with a cover and without flask;
  • FIG. 4 is a plan view of the casting centrifugal vacuum apparatus of FIG. 3, with the cover removed and the flask removed;
  • FIG. 5 is a cross-sectional view of a centrifugal-vacuum foundry with a cover, a flask and a gate;
  • FIG. 6 - the first embodiment of a spiral-conical gate
  • FIG. 7 - the second embodiment of a spiral-conical gate
  • FIG. 8 - the third embodiment of a spiral-conical gate
  • FIG. 9 - the fourth embodiment of a spiral-conical gate
  • FIG. 10 ⁇ fifth embodiment of a spiral-conical gate.
  • an economical and compact centrifugal vacuum casting plant of high productivity is considered.
  • Such an installation consists of: a platform disk, a rotor shell, flasks, a cover, a protective casing, and controls removed from the installation working area.
  • the installation design also includes: engine, vacuum pump, compressor, injection funnel, speed sensors, temperature sensors, disk stop, emergency power reset button, electromagnetic air valves, protective cover and programmer with monitor.
  • the installation is used for the artistic casting of various metals and alloys from aluminum to titanium alloys, in dentistry, mechanical engineering, aviation, etc.
  • An essential factor for reliable and stable operation of the foundry is the ability to programmatically control the entire casting process with output to a visual processing monitor: a temporary second-by-second display of each phase of the casting process, in relation to the technological requirements of the casting process of a particular metal. In this case, excludes the so-called “Human factor” - allows you to make the casting process technologically predictable.
  • a vertical centrifugal-vacuum foundry installation (Fig. 1-4) contains a support disk 1 mounted in a bearing support equipped with a rotation drive (made in the form of a massive driven belt drive pulley, a belt drive with an electric motor and an engine control system is not shown).
  • the support disk in the support base is mounted on the sleeve 2 on the bearing bearings 3 with the possibility of rotation.
  • the shaft 4 of the support disk, mounted in the indicated bearing bearings 3, is made with a coaxial hole forming a channel 5, connected on one side with a vacuum system for discharging the cavity of the internal volume of the installation housing (the vacuum system is not shown, it can be implemented as in the prototype SU 1770055). On the other hand, this channel is in communication with the cavity to accommodate form 6 and gate 7.
  • the design of the multilayer thermal insulation coating 9 is not considered.
  • a cylindrical flask 10 is installed with perforated holes 11 in the side wall (the flask is made in the form of a thin-walled cylinder made of heat-resistant material). And in the cavity formed by the multilayer heat-insulating coating 9 and the outer wall of a cylindrical shape flask 10, directly along the multilayer heat-insulating coating 9 along the inner perimeter there is a shell 12 with vertically mounted guides 13 for the flask, which simultaneously serve as forced cooling blades.
  • This cavity between the casing and the flask is in communication with the cooling system with the receiver duct guides and the forced cooling supercharger (this cooling system is not structurally shown).
  • the vertically arranged guides on which the flask rests capture portions of the cooling agent and involve this agent in rotation (ensuring the cooling intensification process )
  • grooves 14 are made for clearly positioning the flask and eliminating its independent movement around the circumference relative to the shell and the housing.
  • the housing is closed from above by a lid 15 (there are manual mechanical locks 16) with a release valve 17 and with a mouth 18 of the melt.
  • the lid on the inside is also equipped with a multilayer heat-insulating coating 9.
  • Sprue 7 in this installation is the vertical axis of the flask and coaxial to the axis of rotation of the housing and the support disk (Fig. 5).
  • a gate is used, in which the main injection channel is made in the form of a spiral-helix line (Fig. 6, 9 and 10).
  • this main injection channel can be made single-channel and conical, tapering in the direction from the filler neck to the outlet (such a gate can be used for piece or small batches of products).
  • the laval injection channel can be made equal in length to the length of at least one spiral. For a large number of injection molded products, a gate can be used (Figs.
  • each channel is equal in length to the length of at least one spiral.
  • Spiral-conical gate is used to convert a turbulent metal flow into a laminar one.
  • Provides acceleration of the flow of molten metal (linear acceleration * rotation speed, as well as due to the narrowing of the sprue channel).
  • This increases the pressure of the casting, increases the clarity of the surface of the casting and the density of the casting.
  • Increasing the efficiency of casting is ensured by reducing the weight of the gating system.
  • Such sprues allow the manufacture of polymetallic castings (strictly calculated weight of each metal layer).
  • the platform is made in the form of a massive support disk 1, driven by a drive pulley to reduce the base center of gravity and stabilize vertical stability.
  • the unit is mounted on the desktop 19, has a built-in cooling system, receiver duct guides and a forced cooling supercharger.
  • the walls of the shells and the covers of the flasks have a multilayer heat-insulating profile.
  • the flask covers are unified in vertical articulation with the neck of the flasks, have exhaust valves for accelerated cooling (crystallization) of the outer layer of the products.
  • the new installation is universal for casting products in the thermal range of melts from 400 ° C to 1800 ° C, using various types of mold masses.
  • the casting process in such an installation includes:
  • a molding material is used, which is a cristobalite-gypsum mixture.
  • a molding material is a cristobalite-gypsum mixture.
  • the molding sand is prepared by adding distilled water to the molding mass and mixing it thoroughly.
  • the estimated amount of molding material and distilled water is 0.32-0.42 l of water per 1 kg of mixture.
  • the filled flask is evacuated and compacted on a vibration-vacuum installation to a residual pressure of 0.98-104 ... 1, 96-104 Pa (0.1 - 0.2 kgf / cm 2 ), after which the molding mixture hardens,
  • Forced cooling provides, if necessary, directional crystallization of the casting metal, as well as a change in the cooling flow rate, in turn, the physicomechanical properties of the casting are improved.
  • Table 1 shows the comparative technical, temporary and economic components of two different foundry technologies.
  • a single standard size of the blade of a gas turbine installation of 60x30x90 mm, weighing 400 g with a ceramic rod (Draer) was chosen.
  • 30 units of the product were manufactured, with braces, profits and the entire gating system of the power supply as a whole.
  • the melt temperature is 1700 ° C
  • the flask calcined for casting is 900 ° C.
  • the present invention is industrially applicable, tested and has shown high profitability and productivity in the manufacture of products to obtain thin-walled castings, including thin-walled and multi-layer (with layers of different metal or different alloys) with a deviation from the specified size of not more than 0.5% and a surface finish of 5— 6 cl.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

L'invention concerne la fonderie. L'installation de coulée verticale à centrifuge sous vide comprend un disque d'entraînement d'appui sur lequel est monté le corps dans la cavité duquel est disposé un châssis de moulage de forme cylindrique possédant des orifices perforés dans la paroi latérale, la cavité du corps communiquant avec le système de génération de vide. Le boîtier est muni d'un couvercle possédant une vanne de sortie et une tubulure d'entrée de masse fondue, le corps et le couvercle étant munis de l'intérieur d'un revêtement thermique isolant à couches multiples, et le tuyau de coulée est disposé le long du châssis de moulage vertical. L'installation est munie d'un système de refroidissement doté d'un guide des conduites d'air du récepteur et d'un compresseur de refroidissement forcé; on a disposé dans la cavité du corps directement le long du revêtement thermique isolant à couches multiples sur le périmètre interne une virole comportant des guides verticaux pour le châssis de moulage qui servent en même temps de pales de refroidissement forcé, la cavité entre la virole et le châssis de moulage communique avec le système de refroidissement; on a monté dans la cavité du châssis de moulage un tuyau de coulée dont le canal de coulée principal est au moins doté d'un canal unique et conique qui se rétrécit dans la direction de la tubulure d'entrée vers l'orifice de sortie.
PCT/RU2013/000276 2013-04-02 2013-04-02 Installation de coulée verticale à centrifuge sous vide et tuyau de coulée pour cette installation (et variantes) WO2014163522A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
RU2013129498/02U RU136374U1 (ru) 2013-04-02 2013-04-02 Вертикальная центробежно-вакуумная литейная установка и литник для этой установки (варианты)
PCT/RU2013/000276 WO2014163522A1 (fr) 2013-04-02 2013-04-02 Installation de coulée verticale à centrifuge sous vide et tuyau de coulée pour cette installation (et variantes)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/RU2013/000276 WO2014163522A1 (fr) 2013-04-02 2013-04-02 Installation de coulée verticale à centrifuge sous vide et tuyau de coulée pour cette installation (et variantes)

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WO2014163522A1 true WO2014163522A1 (fr) 2014-10-09

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PCT/RU2013/000276 WO2014163522A1 (fr) 2013-04-02 2013-04-02 Installation de coulée verticale à centrifuge sous vide et tuyau de coulée pour cette installation (et variantes)

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RU (1) RU136374U1 (fr)
WO (1) WO2014163522A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109351931A (zh) * 2018-12-06 2019-02-19 扬州峰明光电新材料有限公司 带孔道铝合金筒状壳体的精密铸造成套装置
CN110340302A (zh) * 2019-08-22 2019-10-18 徐海东 一种六边形壳体铸造产品件用的形腔设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2597799C2 (ru) * 2014-05-15 2016-09-20 Анатолий Александрович Катаев Способ центробежного литья и устройство для его реализации

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1346299A (fr) * 1962-10-01 1963-12-20 Foundry Equipment Ltd Perfectionnements à la fabrication de pièces moulées
SU481365A1 (ru) * 1973-07-16 1975-08-25 Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт Ювелирной Промышленности Устройство дл центробежной заливки форм
RU1770055C (ru) * 1990-06-19 1992-10-23 В.В.Ефремов, А.В.Доровский, В.В.Тодоров, П.И.Гурский и Н.М.Базутов Устройство дл центробежного лить
RU2009007C1 (ru) * 1992-07-02 1994-03-15 Научно-исследовательский институт технологии и организации производства двигателей Литниковая система для центробежного литья сложнопрофильных деталей

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1346299A (fr) * 1962-10-01 1963-12-20 Foundry Equipment Ltd Perfectionnements à la fabrication de pièces moulées
SU481365A1 (ru) * 1973-07-16 1975-08-25 Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт Ювелирной Промышленности Устройство дл центробежной заливки форм
RU1770055C (ru) * 1990-06-19 1992-10-23 В.В.Ефремов, А.В.Доровский, В.В.Тодоров, П.И.Гурский и Н.М.Базутов Устройство дл центробежного лить
RU2009007C1 (ru) * 1992-07-02 1994-03-15 Научно-исследовательский институт технологии и организации производства двигателей Литниковая система для центробежного литья сложнопрофильных деталей

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109351931A (zh) * 2018-12-06 2019-02-19 扬州峰明光电新材料有限公司 带孔道铝合金筒状壳体的精密铸造成套装置
CN109351931B (zh) * 2018-12-06 2023-09-05 扬州峰明光电新材料有限公司 带孔道铝合金筒状壳体的精密铸造成套装置
CN110340302A (zh) * 2019-08-22 2019-10-18 徐海东 一种六边形壳体铸造产品件用的形腔设备

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