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Developing a press for static and dynamic testing of orthopedic devices and biological tissue
Desarrollo de una prensa para pruebas estáticas y dinámicas de elementos ortopédicos y tejidos biológicos
DOI:
https://doi.org/10.15446/ing.investig.v28n3.15132Keywords:
mechanical test machine, biomechanical device, external fixer (en)máquina de pruebas mecánicas, dispositivos biomecánicos, fijadores externos (es)
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This paper describes designing and constructing a test machine having an 1,800 N capacity and maximum 3 Hz frequency which will be used in static and dynamic testing of biological tissues and orthopedic devices such as external fixers. It consists of an octagonal base with 500 mm distance between faces and a crosshead which slides between two columns (useful 350 mm opening) thus allowing changing the height (maximum 600 mm) according to the size of the specimen to be tested. A ball screw actuator is mounted over the crosshead which transforms a servomotor’s rotating movement into a lineal movement (maximum 150 mm stroke). First validations indicated that the machine performed within the design parameters. This project shows that the technology required for supporting research is possible in developing countries thereby avoiding dependence on foreign companies for supporting, maintaining and updating equipment. Some conditions were also produced for the evolution of mechanical engineering in Colombia.
Se describe el diseño y la construcción de una prensa con una capacidad de 1.800 N y una frecuencia máxima de 3 Hz que será utilizada para realizar pruebas estáticas y dinámicas de tejidos biológicos y elementos ortopédicos como fijadores externos. Consta de una base octagonal con una distancia entre caras de 500 mm y un travesaño que desliza sobre dos columnas (distancia útil de 350 mm), permitiendo así modificar la altura de trabajo (máxima de 600 mm) de acuerdo con el tamaño del elemento a probar. Sobre el travesaño está montado un actuador de tornillo con tuerca de bolas recirculantes, el cual transforma la rotación de un servomotor en un desplazamiento lineal (máximo de 150 mm). Las primeras validaciones indicaron un comportamiento de la prensa dentro de los parámetros de diseño estipulados. Este proyecto tiende a demostrar que en países en desarrollo es posible generar la tecnología necesaria para apoyar la investigación, lo que evita crear una dependencia de las compañías extranjeras para la modernización, el soporte y el mantenimiento del equipo. Adicionalmente, se generan condiciones para la evolución de la ingeniería mecánica en Colombia.
References
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Copyright (c) 2008 Arlex Leyton Virgen, José Daniel Ballén Briceño, Richard Moran Perafán, Fernando Casanova García, Carlos Rafael Pinedo Jaramillo, José Jaime García Alvarez
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