Scratch Hardness Tester LINEARTESTER 249 Smart XL
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Prueba de dureza al rayado
Scratch Hardness Tester LINEARTESTER 249 Smart XL
El durómetro optimizado LINEARTESTER 249 Smart XL está destinado, además de su propósito original de aplicación, es decir, establecer la capacidad de una superficie para resistir el daño por rayado, también para varias otras pruebas: Pruebas de rayado; Pruebas de abrasión a y frocicleta; Pruebas de Crockmeter; Pruebas de MEK; Pruebas que determinan la resistencia contra disolventes en general o pruebas de limpieza, respectivamente.
El LINEARTESTER 249 Smart XL es un aparato de sobremesa que se maneja mediante una pantalla LCD capacitiva. El accionamiento electromotriz garantiza un movimiento de avance uniforme del carro. La herramienta de prueba se baja y se levanta automáticamente cuando se realizan las pruebas de rayado/escritura. Se dispone de una multitud de herramientas de prueba diferentes (véase la tabla en la descripción técnica más abajo). Las herramientas marcadas con (*) están fabricadas con acero de carburo de tungsteno, recubierto adicionalmente con una capa extremadamente dura. Debido a la apariencia "dorada" de esta capa, cualquier parte desgastada es visualmente muy fácil de reconocer porque el material de carburo de tungsteno bajo la capa "dorada" tiene un color claramente diferente. Con el juego de adaptadores universales disponible opcionalmente (véase la última página de la descripción técnica) también se pueden utilizar varios insertos de herramientas específicos del usuario.
Principio de la prueba: El panel de prueba se fija en un carro móvil mediante carriles de sujeción. Encima de este carro, y sujeta a dos pilares metálicos, se encuentra una viga oscilante que se desplaza libremente y que lleva la herramienta de ensayo adecuada, así como un peso. La fuerza de rayado requerida en el rango de (0,5 a 20)N se ajusta moviendo el peso a lo largo de la viga reciprocante, haciendo uso de una escala de ajuste (un peso de carga adicional de (1 a 40)N está disponible opcionalmente). La máquina de ensayo está equipada con un dispositivo de brazo de carga de altura ajustable en 4 posiciones con una altura estándar de unos 10 mm (+20/+40/+60 mm). Para utilizar el ajuste vertical, se requiere también un juego de piezas de sujeción de muestras (Nº de pedido 21010232). El manejo (ajustes) se realiza a través de una pantalla LCD capacitiva. Para iniciar un ensayo de rayado/escritura, la herramienta de ensayo se baja sobre la muestra al avanzar, iniciando inmediatamente el proceso de rayado. El panel de ensayo puede desplazarse lateralmente para poder realizar una serie de arañazos uno al lado del otro con diferentes ajustes de fuerza. Gracias a una regla integrada en la placa de deslizamiento, se puede conseguir muy fácilmente una distancia uniforme entre los arañazos. Cuando se comprueban revestimientos aislantes sobre sustratos conductores, un reconocimiento eléctrico del rayado pasante ofrece una seguridad adicional para el ajuste de la fuerza de rayado. En los ensayos de abrasión, de crockmeter, de MEK o de barrido, el movimiento de ensayo se realiza con la herramienta bajada sobre la probeta, en ciclos preestablecidos de ida y vuelta. Para ello, hay que retirar la placa guía de la placa de deslizamiento. Las velocidades de ensayo se pueden ajustar libremente. El LINEARTESTER Smart está equipado con longitudes de carrera variables.
Technical Descriptions
Norms
- ISO 1518
Technical specifications
Motor
Electric
Geometria de ranura
Van Laar, Bosch, ISO, Clemen, etc.
Fuerza de Ensayo
0.5-40 N
Portatil / Estacionaria
Estacionaria
Dimensions (L x W x H)
approx. 680 x 380 x 325 mm
Specimen dimensions
210 x 260 mm
Test speed
Single stroke: (10 - 100)mm/s; double stroke: (10 - 400)mm/s infinitely adjustable
Test length
Single stroke: (50 - 220)mm
Stroke length
Double stroke (35 – 260)mm variably adjustable
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