Recently, the oil hydraulic control system has been widely applied to the mining industry, civil engineering and construction industry. Especially, robotized machines have been required to improve laborsaving, safety and production in mining and construction works. The problem of a vibration technique, that is vibration drilling, vibration shearing and vibration pile driver, has been the subject of a great deal of interest in the past few decades. The need to improve efficiency, and maintain economy has prompted the development of new techniques to mining industry and civil engineering such that the cutting or the digging forces are reduced without sacrificing the cost and the size for the oil hydraulic system.
The aim of this study is to design the oil hydraulic vibration cylinder as to a part of the robotized machines. This paper is to investigate the performance efficiency of vibration digging in case that the oil hydraulic vibration cylinder is applied to the hydraulic hoe, and the digging factors of the bucket with by the vibration cylinder are compared with no-vibration cylinder.