WO1999029454A1 - Process for fabricating aluminium valves for burners of domestic gas heaters - Google Patents
Process for fabricating aluminium valves for burners of domestic gas heaters Download PDFInfo
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- WO1999029454A1 WO1999029454A1 PCT/MX1998/000055 MX9800055W WO9929454A1 WO 1999029454 A1 WO1999029454 A1 WO 1999029454A1 MX 9800055 W MX9800055 W MX 9800055W WO 9929454 A1 WO9929454 A1 WO 9929454A1
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- valve
- valve part
- process according
- forging
- valves
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/002—Castings of light metals
- B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/007—Semi-solid pressure die casting
-
- 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
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
- B22D31/002—Cleaning, working on castings
Definitions
- the present invention relates to a process for manufacturing valves and valve parts to control burners of domestic stoves and, more specifically, to a process for manufacturing valves and parts
- Valves and valve parts for controlling burners of domestic gas stoves have normally been made of copper and
- the process of the present invention allows to obtain structures highly homogeneous metallographs, which impart mechanical properties
- Pressure forging process with final forging (known as squeeze injection die-casting) - allowing the use of commercial aluminum alloys of injection quality, in order to obtain mechanical properties
- Tribological properties The size and distribution of the second metallographic phase and the secondary recrystallization of the aluminum alloy obtained by the injection and forging processes at the beginning of the third phase of
- Advanced metallographic structure crystallization, recrystallization,
- the remaining porosity is controlled to obtain, as an additional advantage,
- This manufacturing process has fewer CPK variations, that is,
- valves and valve parts obtained by the process of the present invention have a
- valves and valve parts for controlling burners of domestic gas stoves, with commercial aluminum alloys of injection quality, in order to obtain valve parts that have high performance mechanical and tribological properties.
- burners of domestic gas stoves which combines the benefits of the pressure injection process with final forging, with a final forging process and surface finishing of the workpiece.
- the process for the manufacture of valves and valve parts for controlling burners of domestic gas stoves comprises: a) injecting under pressure, with final forging, an aluminum alloy molten
- (metallic) in an injection matrix of a work valve piece which includes three phases, a first phase that allows the matrix to be filled with metal, a second phase that compresses the metal and a third phase that forges the metal into a Cavity designed to control the filling volume to impart high structural homogeneity, and an opening phase that controls cooling in the opening of the die, relieving internal stresses and controlling grain size, in order to produce a valve piece , the forging or rapid tapping at the end of the compression stage, allows the metal to deform plastically above its recrystallization temperature, allowing the metal to recrystallize in an ultra-thin metallographic structure;
- valve piece for its final finish; and c) deburring the valve part by means of vibration and turboabrasion processes, in a fluidized bed, in order to effectively eliminate machining imperfections due to burrs that inevitably are
- valve allowing the valve piece to acquire a high duration to the
- the process provides high dimensional stability to the alloy due to the release of stress that is provided by a
- the process incorporates a volume control at the beginning of the pressure injection process, so that it allows a high homogeneity of the
- the machining and deburring for surface finishing of the valve parts by means of vibration and turboabrasives applied in fluidized bed allows to obtain surfaces free of roughness or burrs that can affect the operation of the parts that rotate in contact with each other.
- the process of superficial finishing by turboabrasive bombardment produces a hardness of the surfaces.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
Process for the fabrication of valves and valve parts made of aluminium to control burners of domestic gas stoves through the combination of the advantages of a pressure injection process with final forging, enabling the use of commercial aluminium alloys of injection grade to obtain the high efficient mechanical and tribologic properties, with final forging to control the porosity, producing components which require a minimum number of machining operations after fabrication due to the reduced rugosity of the surface finish obtained with such final forging, as well as a surface finish process for the valve part, by vibration burring and turbo-abrasion in fluidised bed providing it with a hardened surface which improves its wear resistance and reduces its friction coefficient.
Description
PROCESO PARA FABRICAR VÁLVULAS DE ALUMINIO PARA PROCESS FOR MANUFACTURING ALUMINUM VALVES FOR
QUEMADORES DE ESTUFAS DOMESTICAS DE GAS.GAS DOMESTIC STOVES BURNERS.
ANTECEDENTES DE LA INVENCIÓN.BACKGROUND OF THE INVENTION
A. CAMPO DE LA INVENCIÓN. La presente invención, se relaciona con un proceso para fabricar válvulas y piezas de válvula para controlar quemadores de estufas domésticas y, más específicamente, a un proceso para la fabricación de válvulas y piezasA. FIELD OF THE INVENTION. The present invention relates to a process for manufacturing valves and valve parts to control burners of domestic stoves and, more specifically, to a process for manufacturing valves and parts
de válvula hechas de aleaciones de aluminio, mediante procesos de inyecciónValves made of aluminum alloys, by injection processes
a presión con forja final (conocido como "squeeze injection die-casting"), ypressure with final forging (known as "squeeze injection die-casting"), and
turbo-abrasión en lecho fluidizado.turbo-abrasion in fluidized bed.
B. DESCRIPCIÓN DEL ARTE RELACIONADO.B. DESCRIPTION OF RELATED ART.
Las válvulas y las piezas de válvula para controlar quemadores de estufas domésticas de gas, han sido normalmente fabricadas de cobre yValves and valve parts for controlling burners of domestic gas stoves have normally been made of copper and
bronce, principalmente mediante forja y maquinado y, algunas piezas, mediante troquelado, requiriendo de numerosas etapas de maquinado ybronze, mainly by forging and machining and, some parts, by die cutting, requiring numerous machining stages and
acabado pulido.polished finish.
Ya se han producido válvulas de aleaciones de aluminio y de aluminio forjado. Sin embargo, no obstante de su gran maquinabilidad, estas hanAluminum alloy and forged aluminum valves have already been produced. However, despite their great machinability, these have
resultado muy costosas debido a las numerosas etapas de maquinado y deresult very expensive due to the numerous stages of machining and of
pulido, que son necesarias para su fabricación, y debido a los costosospolishing, which are necessary for its manufacture, and due to expensive
componentes de aleación, de tales materiales.alloy components, of such materials.
Las válvulas de aleaciones de aluminio para inyección a presión, no seAluminum alloy valves for pressure injection are not
han producido comercialmente debido a la alta heterogeneidad de lashave produced commercially due to the high heterogeneity of the
estructuras metalográficas obtenidas actualmente.metallographic structures currently obtained.
El proceso de la presente invención, permite obtener estructuras
metalográficas altamente homogéneas, que imparten propiedades mecánicasThe process of the present invention allows to obtain structures highly homogeneous metallographs, which impart mechanical properties
y de antifriccion superiores, así como una gran maquinabilidad para talesand superior antifriction, as well as great machinability for such
válvulas y piezas de válvula.valves and valve parts.
El proceso de la presente invención, combina los beneficios delThe process of the present invention combines the benefits of
proceso de inyección a presión con forja final (conocido como squeeze injection die-casting) -permitiendo el uso de aleaciones de aluminio comerciales de calidad de inyección, a fin de obtener propiedades mecánicasPressure forging process with final forging (known as squeeze injection die-casting) - allowing the use of commercial aluminum alloys of injection quality, in order to obtain mechanical properties
y tribológicas de alto desempeño mediante refinación del tamaño de grano-,and high performance tribological by refining grain size-,
con una forja final que asegura el control de la porosidad -produciendo componentes que requieren un mínimo de operaciones de maquinado posteriores a la fabricación, debido a la baja rugosidad del acabado superficial obtenida-, y con un proceso de acabado superficial para la pieza de válvula, llevado a cabo mediante desbarbado por turbo-abrasión en lecho fluidizado,with a final forging that ensures the control of the porosity -producing components that require a minimum of machining operations after manufacturing, due to the low roughness of the surface finish obtained-, and with a surface finishing process for the valve part , carried out by fluidized bed turbo-abrasion deburring,
que imparte una superficie endurecida que mejora su resistencia al desgaste ywhich imparts a hardened surface that improves its wear resistance and
reduce su coeficiente de fricción.reduces its coefficient of friction.
Este proceso, tal como se describirá adelante, proporciona, entre otras, las siguientes ventajas:This process, as will be described below, provides, among others, the following advantages:
Una alta maquinabilidad.- La estructura metalográfica obtenida por el proceso de inyección a presión con forja final, produce un cristal ultrafino queHigh machinability.- The metallographic structure obtained by the injection process with final forging, produces an ultra-thin crystal that
mejora la maquinabilidad produciendo superficies muy lisas y también permiteimproves machinability by producing very smooth surfaces and also allows
un proceso de corte de alta velocidad debido a que reduce el tamaño de lasa high speed cutting process because it reduces the size of the
rebabas que tienen que ser eliminadas por un proceso posterior de acabadoburrs that have to be removed by a subsequent finishing process
por desbarbado.by deburring.
Propiedades tribológicas.- El tamaño y distribución de la segunda fase metalográfica y la recristalización secundaria de la aleación de aluminio
obtenida por los procesos de inyección y forja al principio de la tercera fase deTribological properties.- The size and distribution of the second metallographic phase and the secondary recrystallization of the aluminum alloy obtained by the injection and forging processes at the beginning of the third phase of
inyección a presión, produce una estructura con propiedades tribológicas depressure injection, produces a structure with tribological properties of
alto desempeño, del tipo de antifricción, permitiendo mejorar la resistencia al desgaste natural de las piezas que se deslizan entre si durante la rotación. Resistencia a la temperatura.- La aleación de aluminio usada enhigh performance, of the antifriction type, allowing to improve the natural wear resistance of the pieces that slide between them during the rotation. Temperature resistance.- The aluminum alloy used in
relación con este proceso, permite que las piezas de válvula giratoriasrelationship with this process, allows the rotating valve parts
trabajen en forma segura, sin perder su resistencia mecánica, sin promoverwork safely, without losing their mechanical strength, without promoting
deformaciones, hasta los 140°C.deformations, up to 140 ° C.
Baja relación peso-volumen.- La gravedad específica de la aleación y la construcción de la válvula, permiten una relación de peso-volumen muy ventajosa de la pieza de válvula, ofreciendo a su vez una alta resistencia con bajo peso de los componentes.Low weight-volume ratio.- The specific gravity of the alloy and the construction of the valve, allow a very advantageous weight-volume ratio of the valve piece, offering high resistance with low component weight.
Estructura metalográfica avanzada: cristalización, recristalización,Advanced metallographic structure: crystallization, recrystallization,
nanomateriales, porosidad controlada.- Los procesos de inyección y forja,nanomaterials, controlled porosity.- Injection and forging processes,
producen una estructura metalográfica ultrafina proporcionando propiedades mecánicas, de manufacturabiiidad y maquinabilidad superiores, así como un acabado superficial fino que da por resultado un acabado antifricción superior.They produce an ultra-thin metallographic structure providing superior mechanical, machinability and machinability properties, as well as a fine surface finish that results in a superior anti-friction finish.
La porosidad remanente es controlada para obtener, como ventaja adicional,The remaining porosity is controlled to obtain, as an additional advantage,
la posibilidad de impregnación del material con grasa lubricante.the possibility of impregnating the material with lubricating grease.
Resistencia mecánica mejorada.- La fina estructura metalográficaImproved mechanical resistance.- The fine metallographic structure
obtenida proporciona una resistencia mecánica superior a la aleación de aluminio, que aquella del mismo material producida bajo condiciones normales.obtained provides a superior mechanical resistance to aluminum alloy, than that of the same material produced under normal conditions.
Este proceso de fabricación presenta menos variaciones CPK, es decir,This manufacturing process has fewer CPK variations, that is,
tiene gran manufacturabilidad para producir piezas de válvula dentro de
tolerancias especificadas.It has great manufacturabilidad to produce parts of valve inside specified tolerances.
Y por último, pero no menos importante, las válvulas y las piezas de válvula obtenidas por el proceso de la presente invención, tienen unaAnd last but not least, the valves and valve parts obtained by the process of the present invention have a
variación mínima de las propiedades de la válvula anteriormente referidas,minimum variation of the valve properties mentioned above,
resultando con mucho menos defectos y presentando un alto desempeño.resulting in much less defects and presenting high performance.
Todas estas ventajas permiten producir económica e industrialmente válvulas y piezas de válvula hechas con aleaciones de aluminio comerciales de calidad de inyección, que no era posible en el arte relacionado.All these advantages allow to produce economically and industrially valves and valve parts made with commercial aluminum alloys of injection quality, which was not possible in the related art.
SUMARIO DE LA INVENCIÓN.SUMMARY OF THE INVENTION
Es por lo tanto un objetivo principal de la presente invención,It is therefore a main objective of the present invention,
proporcionar un método para la fabricación de válvulas y piezas de válvula para controlar quemadores de estufas domésticas de gas, con aleaciones de aluminio comerciales de calidad de inyección, a fin de obtener piezas de válvula que tienen propiedades mecánicas y tribológicas de alto desempeño.provide a method for the manufacture of valves and valve parts for controlling burners of domestic gas stoves, with commercial aluminum alloys of injection quality, in order to obtain valve parts that have high performance mechanical and tribological properties.
Es también un objetivo principal de la presente invención, proporcionarIt is also a main objective of the present invention to provide
un método para la fabricación de válvulas y piezas de válvula para controlara method for manufacturing valves and valve parts to control
quemadores de estufas domésticas de gas, de la naturaleza anteriormente descrita, que combina los beneficios del proceso de inyección a presión con forja final, con un proceso de forja final y acabado superficial de la pieza deburners of domestic gas stoves, of the nature described above, which combines the benefits of the pressure injection process with final forging, with a final forging process and surface finishing of the workpiece.
válvula, mediante turboabrasión en lecho fluidizado, que imparte una durezavalve, through fluidized bed turboabrasion, which imparts a hardness
superficial que mejora la resistencia al desgaste de las piezas de válvula ysurface that improves the wear resistance of the valve parts and
reduce su coeficiente de fricción.reduces its coefficient of friction.
Es otro objetivo principal de la presente invención, proporcionar unIt is another main objective of the present invention, to provide a
método para la fabricación de válvulas y piezas de válvula para controlar quemadores de estufas domésticas de gas, de la naturaleza anteriormente
descrita, que proporciona una alta dureza superficial, una alta maquinabilidad, propiedades tribológicas superiores, alta resistencia a la temperatura, baja relación peso-volumen de la piezas de válvula , y una resistencia mecánica mejorada. Estos y otros objetivos y ventajas de la presente invención, se harán aparentes a aquellas personas que tienen habilidad ordinaria en el arte, de la siguiente descripción detallada de la invención. DESCRIPCIÓN DETALLADA DE LA INVENCIÓN.method for the manufacture of valves and valve parts for controlling burners of domestic gas stoves, of the nature above described, which provides high surface hardness, high machinability, superior tribological properties, high temperature resistance, low weight-volume ratio of the valve parts, and improved mechanical strength. These and other objectives and advantages of the present invention will become apparent to those persons who have ordinary skill in the art, from the following detailed description of the invention. DETAILED DESCRIPTION OF THE INVENTION.
El proceso para la fabricación de válvulas y piezas de válvula para controlar quemadores de estufas domésticas de gas, de acuerdo con una modalidad específica y preferida, de la presente invención, comprende: a) inyectar a presión, con forja final, una aleación de aluminio fundidoThe process for the manufacture of valves and valve parts for controlling burners of domestic gas stoves, according to a specific and preferred embodiment of the present invention, comprises: a) injecting under pressure, with final forging, an aluminum alloy molten
(metálica) en una matriz de inyección de una pieza de válvula de trabajo, que incluye tres fases, una primera fase que permite llenar la matriz con el metal, una segunda fase que comprime el metal y una tercera fase que forja el metal en una cavidad designada para controlar el volumen de llenado para impartir una alta homogeneidad estructural, y una fase de abertura que controla el enfriamiento en la abertura de la matriz, aliviando los esfuerzos internos y controlando el tamaño de grano, a fin de producir una pieza de válvula, la forja o golpeo rápido al final de la etapa de compresión, permite deformar plásticamente el metal por arriba de su temperatura de recristalización, permitiendo al metal recristalizar en una estructura metalográfica ultrafina;(metallic) in an injection matrix of a work valve piece, which includes three phases, a first phase that allows the matrix to be filled with metal, a second phase that compresses the metal and a third phase that forges the metal into a Cavity designed to control the filling volume to impart high structural homogeneity, and an opening phase that controls cooling in the opening of the die, relieving internal stresses and controlling grain size, in order to produce a valve piece , the forging or rapid tapping at the end of the compression stage, allows the metal to deform plastically above its recrystallization temperature, allowing the metal to recrystallize in an ultra-thin metallographic structure;
b) maquinar y desbarbar la pieza de válvula a altas velocidades de corte, por medio de herramientas de diamante a fin de reducir
considerablemente el borde de ensamblado (BUE), produciendo un acabadob) machining and deburring the valve part at high cutting speeds, by means of diamond tools in order to reduce considerably the assembly edge (BUE), producing a finish
superficial de baja rugosidad, impartiendo altas propiedades de antifricción asurface of low roughness, imparting high antifriction properties to
la pieza de válvula de trabajo, debido a la alta consistencia metalográfica lograda por la etapa de inyección a presión con forja final, preparando en estaThe work valve piece, due to the high metallographic consistency achieved by the final injection forging stage, preparing in this
forma la pieza de válvula para su acabado final; y c) desbarbar la pieza de válvula por medio de procesos de vibración y turboabrasión, en lecho fluidizado, a fin de eliminar efectivamente las imperfecciones de maquinado debido a las rebabas que inevitablemente sonIt forms the valve piece for its final finish; and c) deburring the valve part by means of vibration and turboabrasion processes, in a fluidized bed, in order to effectively eliminate machining imperfections due to burrs that inevitably are
producidas durante la etapa de maquinado, así como los bordes cortantesproduced during the machining stage, as well as the cutting edges
mediante los efectos de corte y pulido producidos por los turboabrasivos enthrough the cutting and polishing effects produced by turboabrasives in
donde millones de partículas pequeñas abrasivas pulen las superficies internas y externas de las piezas de válvula, produciendo de esta manera una superficie muy dura como resultado de la deformación plástica en frío causada por el impacto de las partículas abrasivas en la superficie de las piezas dewhere millions of small abrasive particles polish the internal and external surfaces of the valve parts, thereby producing a very hard surface as a result of the cold plastic deformation caused by the impact of the abrasive particles on the surface of the parts of
válvula, permitiendo que la pieza de válvula adquiera una alta duración a lavalve, allowing the valve piece to acquire a high duration to the
fatiga y un bajo coeficiente de fricción necesario en este tipo de válvulas enfatigue and a low coefficient of friction necessary in this type of valves in
donde las superficies están en contacto giratorio.where the surfaces are in rotating contact.
La inyección a presión con forja final es el único proceso que combinaPressure injection with final forging is the only process that combines
el beneficio de la inyección a presión con una forja final que asegura el controlthe benefit of pressure injection with a final forge that ensures control
de la porosidad produciendo componentes que requieren un mínimo deof the porosity producing components that require a minimum of
operaciones de post-acabado, proporcionando un acabado superficial de bajapost-finishing operations, providing a low surface finish
rugosidad. El proceso proporciona una alta estabilidad dimensional a la aleación debido a la liberación de esfuerzos que es proporcionada por unroughness The process provides high dimensional stability to the alloy due to the release of stress that is provided by a
enfriamiento controlado en el molde y que permite incrementar la precisión decontrolled cooling in the mold and that increases the accuracy of
las dimensiones logradas. Las propiedades mecánicas superiores logradas,
son superiores debido a la estructura metalográfica ultrafina obtenida en losThe dimensions achieved. The superior mechanical properties achieved, they are superior due to the ultrafine metallographic structure obtained in the
procesos de inyección y forja.injection and forging processes.
El proceso incorpora un control de volumen al principio del proceso de inyección a presión, de manera que permite una alta homogeneidad delThe process incorporates a volume control at the beginning of the pressure injection process, so that it allows a high homogeneity of the
material.material.
El maquinado y desbarbado para acabado superficial de las piezas de válvula por medio de vibración y turboabrasivos aplicados en lecho fluidizado, permite obtener superficies libres de rugosidad o rebabas que puedan afectar la operación de las partes que giran en contacto entre si. El proceso de acabado superficial por bombardeo turboabrasivo produce una dureza de las superficies.The machining and deburring for surface finishing of the valve parts by means of vibration and turboabrasives applied in fluidized bed, allows to obtain surfaces free of roughness or burrs that can affect the operation of the parts that rotate in contact with each other. The process of superficial finishing by turboabrasive bombardment produces a hardness of the surfaces.
El proceso, que combina las propiedades de la inyección a presión y de inyección a presión con forja final aplicadas en la tercera fase de inyección,The process, which combines the properties of pressure injection and pressure injection with final forging applied in the third injection phase,
ofrece un medio único para proporcionar propiedades mecánicas yoffers a unique means to provide mechanical properties and
tribológicas superiores a la aleación de aluminio.tribological superior to aluminum alloy.
Finalmente, se deberá entender que cada una de las etapas aisladas puede ser llevada a cabo a las condiciones de operación usuales conocidas en el arte y, por lo tanto, no han sido incorporadas en esta solicitud.
Finally, it should be understood that each of the isolated stages can be carried out at the usual operating conditions known in the art and, therefore, have not been incorporated into this application.
Claims
REIVINDICACIONES 1. Un proceso para la fabricación de válvulas y piezas de válvula de aleación de aluminio de inyección, para controlar quemadores de estufas domésticas de gas, que comprende:CLAIMS 1. A process for the manufacture of valves and valve parts of injection aluminum alloy, to control burners of domestic gas stoves, comprising:
Inyectar a presión con forja final, una aleación de aluminio fundida, en una matriz de inyección de pieza de válvula, a fin de producir una pieza de válvula que tiene una estructura metalográfica ultrafina; maquinar y desbarbar la pieza de válvula a altas velocidades de corte, a fin de reducir considerablemente el borde de acoplamiento y producir unInject under pressure with final forging, a cast aluminum alloy, into a valve part injection die, in order to produce a valve part that has an ultra-thin metallographic structure; machining and deburring the valve part at high cutting speeds, in order to considerably reduce the coupling edge and produce a
acabado superficial de baja rugosidad, que tiene altas propiedades deLow rough surface finish, which has high properties of
antifricción a la pieza de válvula; y desbarbar la pieza de válvula a fin de eliminar imperfecciones de maquinado, así como bordes cortantes, produciendo de esta manera una superficie endurecida que imparte una alta duración a la fatiga y un bajo coeficiente de fricción a la pieza de válvula, necesario cuando las superticies de la pieza de válvula están en contacto giratorio.antifriction to the valve piece; and deburring the valve part in order to eliminate machining imperfections, as well as cutting edges, thus producing a hardened surface that imparts a high fatigue duration and a low coefficient of friction to the valve part, necessary when the superticies of the valve part are in rotating contact.
2. El proceso de acuerdo con la reivindicación 1 , en donde la etapa de inyección a presión con forja final comprende tres fases, la primera fase permite llenar la matriz con el metal, la segunda fase comprime el metal, y la tercera fase forja el metal en la matriz.2. The process according to claim 1, wherein the final forging pressure injection stage comprises three phases, the first phase allows the matrix to be filled with the metal, the second phase compresses the metal, and the third phase forges the metal in the matrix.
3. El proceso de acuerdo con la reivindicación 1 , que comprende controlar el volumen de llenado de la matriz para impartir una alta homogeneidad estructural a la pieza de válvula.3. The process according to claim 1, which comprises controlling the filling volume of the die to impart high structural homogeneity to the valve part.
4. El proceso de acuerdo con la reivindicación 1, en donde la forja o inyección a presión con forja al final de la etapa de compresión, permite
deformar plásticamente el metal por encima de su temperatura de recristalización, permitiendo una recristalización metálica de la pieza de válvula en una estructura metalográfica ultrafina.4. The process according to claim 1, wherein the forging or pressure injection with forging at the end of the compression stage, allows Plastically deform the metal above its recrystallization temperature, allowing a metal recrystallization of the valve part into an ultra-thin metallographic structure.
5. El proceso de acuerdo con la reivindicación 1 , en donde la etapa de inyección a presión con forja final produce una alta consistencia metalográfica que prepara en esta forma la pieza de válvula para un acabado final.5. The process according to claim 1, wherein the final forging pressure injection stage produces a high metallographic consistency that prepares in this way the valve piece for a final finish.
6. El proceso de acuerdo con la reivindicación 1 , en donde las etapas de maquinado y desbarbado se llevan a cabo mediante herramientas de diamante a fin de reducir considerablemenete el borde de acoplamiento y producir un acabado superficial de baja rugosidad que imparte altas propiedades antifricción a la pieza de válvula.6. The process according to claim 1, wherein the machining and deburring steps are carried out by means of diamond tools in order to considerably reduce the coupling edge and produce a low rough surface finish that imparts high anti-friction properties to the valve piece.
7. El proceso de acuerdo con la reivindicación 1 , en donde la etapa de7. The process according to claim 1, wherein the step of
desbarbado es llevada a cabo mediante turboabrasivos en lecho fluidizado, en donde millones de partículas abrasivas pulen las superficies internas y externas de la pieza de válvula, produciendo de esta manera una superficie endurecida como resultado de la deformación plástica en frío ocasionada por el impacto de las partículas abrasivas en la superficie de la pieza de válvula, permitiendo que la pieza de válvula adquiera una alta duración a la fatiga y un bajo coeficiente de fricción.
deburring is carried out by fluidized bed turboabrasives, where millions of abrasive particles polish the internal and external surfaces of the valve piece, thereby producing a hardened surface as a result of the cold plastic deformation caused by the impact of the abrasive particles on the surface of the valve part, allowing the valve part to acquire a high fatigue duration and a low coefficient of friction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US98774897A | 1997-12-09 | 1997-12-09 | |
| US08/987,748 | 1997-12-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999029454A1 true WO1999029454A1 (en) | 1999-06-17 |
Family
ID=25533522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/MX1998/000055 WO1999029454A1 (en) | 1997-12-09 | 1998-12-09 | Process for fabricating aluminium valves for burners of domestic gas heaters |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1999029454A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8585897B2 (en) | 2008-12-05 | 2013-11-19 | Xun Wang | Cylindrical back washing purification apparatus |
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| EP0816042A1 (en) * | 1996-07-03 | 1998-01-07 | GUIDO BAGGIOLI S.N.C. DI BAGGIOLI GIUSEPPE & PELLEGRINI CLEMENTINA | A process for manufacturing alloy castings |
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| GB666087A (en) * | 1949-05-25 | 1952-02-06 | Victor Alexander Lowinger | Improvements relating to wrought aluminium-tin alloys |
| GB822059A (en) * | 1955-11-16 | 1959-10-21 | Vaw Ver Aluminium Werke Ag | Method of treating articles of aluminium or aluminium alloy for producing surfaces with a mirror-like lustre |
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| US8585897B2 (en) | 2008-12-05 | 2013-11-19 | Xun Wang | Cylindrical back washing purification apparatus |
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