Diseño y construcción de una máquina de desgaste acelerado para homologación de maquinaria agrícola en motocultores para suelos típicos de la región centro del Ecuador: caso de estudio aspas del motocultor YTO DF-151

Abstract

The present work has three objectives: a) to solve the problem of low reliability in YTO DF 151 motocultor blades owned by MAGAP-Chimborazo b) to build an accelerated wear machine according to specifications of standard ASTM G-65 c) to stablish minimum requirements to approve tools of agricultural mechanization, in aspects such as: surface hardness, analysis of material composition, energy absorption rate per unit area to impact, optimum tool geometry to efficiently support field workloads; these targets were achieved by developing this research in the following chapters: Chapter one: generalities, justification and scope. Chapter two: conducting a series of test (destructive and no destructive) to the blades, as well as the simulation in CAD/CAE software to determinate the factors of their low reliability and to attack this problem, among the previous solutions are: thermal treatments and enlargement of the cross section (final solution). Chapter three: the design, construction, calibration and validation of an accelerated wear machine according to ASTM G-65, it is used to determinate the wear rate of the blades. Chapter four: it deals with the minimum mechanical properties requirements that the blades must have to be built on Ecuador or imported.