1985 Volume 47 Issue 1 Pages 43-49
In the previous paper (Part 1), it was found that the cutting directional angle β is one of the most important parameters of vibrating subsoiler and the vibrating type of β>0° is the optimal one for draft force reduction.
The main purpose of this paper (Part 2) is to know how effective the amplitude and the frequency are on draft force reduction.
The tested subsoiler was the remodelled subsoiler No. 1, described in the previous paper (Part 1). The chisel of this machine has a mixed motion of backward and forward combined with up and down. Three different cutting directional angle β were used. The amplitude was varied as follows 8.2, 15.9, 24.9, 35.0mm. The frequency was varied from 3.75Hz to 18.0Hz. The travel velocity was varied as follows 0.25, 0.60, 1.0m/s.
It is concluded from the experiments that the effect of the amplitude on draft force reduction is greater than that of the frequency and at the same velocity ratio λ=V0/(2πaf), the draft force decreases as the amplitude is greater.
