tema 3: acabado superficial
DESCRIPTION
ÂTRANSCRIPT
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UNIVERSIDAD NACIONAL
MAYOR DE SAN MARCOS
FAC.ING.INDUSTRIAL
CURSO:
DIBUJO INDUSTRIAL
CAPITULO 5
ACABADO SUPERFICIAL
Ing. Oswaldo Rojas Lazo
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SUPERFICIES DE OBJETOS
METÁLICOS
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ACABADO SUPERFICIAL
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IMPORTANCIA DEL ACABADO DE
UNA SUPERFICIE
• Función a desempeñar de las piezas
• Piezas ensambladas con superficies en
movimiento
• Razones estéticas
• Por seguridad
• Desgaste de las superficies
• Propiedades físicas y mecánicas de las
superficies (dureza, corrosión, etc)
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SECCIÓN SUPERFICIE METÁLICA
Superficie externa
Capa alterada
Interior del metal
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Desviaciones con respecto a la superficie nominal rugosidad
superficial
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ELEMENTOS DE LA TEXTURA DE UNA
SUPERFICIE
1. Rugosidad : Desviaciones pequeñas con respecto a
la superficie nominal
2. Ondulación: Desviaciónes espaciadas, que ocurre
por deflexión, tratamientos térmicos, vibración,
etc.
3. Orientacion: Dirección predominante o patron de
la textura
4. Fallas: Comprenden: grietas, rayas, inclusiones,
fisuras, rajaduras, etc.
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RUGOSIDAD PROMEDIO
Promedio arimético de las desviaciones absolutas
Ra = promedio de rugosidad
y = valor absoluto de las desviaciones verticales
Lm = distancia especificada, sobre la cual se miden las
desviaciones
dxL
yR
m
a
L
m0
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ENDURECIMIENTO SUPERFICIAL
Procesos Termoquímicos
• Carburización
• Cromización
• Nitruración
• Carbonitruración
• Borización
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SÓLIDO CON SUPERFICIES
ACABADAS
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TALADRADO
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TORNEADO
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BARRENADO
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HERRAMIENTAS DE CORTE
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ESCARIADO
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ROSCADO EN TORNO
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OPERACIONES DE FRESADO
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CORTE DE DIENTES - FRESADORA
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FORMADORA
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TIPOS DE SUPERFICIES
SEGÚN LA FUNCIÓN A DESEMPEÑAR
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DEMASÍA PARA MECANIZADO
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ACABADO SUPERFICIAL ASA
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SIGNOS SUPERFICIALES DIN
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SIGNOS SUPERFICIALES DIN
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CLASES ACABADO - MECANIZADO
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CLASES ACABADO - MECANIZADO
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ACABADO SUPERFICIAL DIN
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ACABADO SUPERFICIAL DIN
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ACABADO SUPERFICIAL DIN
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CLASES DE SUPERFICIES
SEGÚN LA FORMA DE OBTENCIÓN
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CALIDADES SUPERFICIALES
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IRREGULARIDADES SUPERFICIALES
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EQUIVALENCIA
RUGOSIDAD
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ORIENTACIÓN DE RUGOSIDADES
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ORIENTACIÓN DE RUGOSIDADES
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ACABADO SUPERFICIAL (ISO)
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ACABADO SUPERFICIAL (ISO)
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EJEMPLO ACAB. SUPERFICAL
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ORIENTACIÓN ACAB. SUPERF.
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EJEMPLO
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MOLETEADO
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MANGO
TERRAJA
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MOLETEADO
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VISTA MICROSCOPICA 2 SUPERF.
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TERMINOLOGÍA ACAB. SUP.
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PIEZA VOLADIZO
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PIEZA APOYOS