Abstract
Recently, the oil hydraulic control system has been widely applied to themining industry, civil engineering and construction industry. Especially, robotizedmachines have been required to improve labor-saving, safety and productionin mining and construction works.The aim of this study is to design the oil hydraulic multi-function cylinderwhich corresponds to the robotized machines. The experiment was made withvariations of the supply pressure, the vibration frequency and the bias voltageunder some levels of constant loads. As a result, the quantitative propertiesaffecting the fundamental properties of oil hydraulic multi-function cylinder, namely, the vibration amplitude, feed speed, the maximum pushing force andthe acceleration were made clear.This paper is to investigate the digging effect in case that the oil hydraulicmulti-function cylinder is applied to the experimental system assumed as anactual hydraulic excavator, and the quantitative properties of the vibrationcylinder caused by the multi-function cylinder were compared with those of novibrationcylinder.
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