Studies on a small trencher (II)

The effects of the shape of blades on the cutting resistance

Abstract

In the previous paper, the authors investigated the characteristics of power performance of a small trencher with a ladder chain type cutting device.
In this paper, some commercial cutting blades were discussed in their shape and dimensions, and then, the nine blades were tested in the soil bin in order to clarify the effects of the shape of blades on the soil cutting resistance. The nine tested blades had different tip angle and tip foreward projection length from commercial blades.
It was found that the soil cutting resistance was decreased as the tip anglewas decreased and tip foreward projection length was increaseed.