Fundamental Studies on Tillage Machinery (IX)

A Study on Vibrating Tillage Method

Abstract

The main aim of this study is to clarify the reason of comparatively small resistance of vibrating tillage tools.
At first, the author estimated the acceleration energy of soil in high frequency vibration tillage. It proved to be comparativ to the energy for cutting soil with the same blade at very low speed.
Then, a series of tests were conducted, varying the distance of forward travel and backward travel in one cycle motion. The resistance force was measeured. The stress distribution in the soil was measured by micro soil stress meters. The pictures of soil deformation were taken through the side window of the soil bin.
The tensile stress in the soil during backward travel and the tensile rupture of the soil near the blade edge were detected. The loosening of the soil above the blade was observed. These rupture and Loosening action contribute to the reduction of resistance.