An Experimental Device for Measuring Cutting Forces of a Cutting Tool

Abstract

Abstract:In this paper, a soil cutting test rig was developed equipping with two force sensors and a displacement sensor. The equipment could perform measurements continuously at various cutting speeds when the cutting tools worked in the soils. The cutting tool is a rectangle blade. It can moves horizontally and cuts a soil sample at a selected angle. The forces and the displacement of the cutting tools can then be obtained by the sensors and recorded for future engineering use. Verification test was then conducted to determine the performance of the developed rig. Marine sediment soil was tested. The cutting resist force, vertical force and the relationship with respect to cutting distance can be measured and the new device can be used in the cutting machines in the future.

Energy Consumption Evaluation of Rotary Tiller Using Dynamic Modelling

“…To determine the exact mechanical properties of different soils types in a given moment of time can be done relatively easily with modern technical measuring devices. But to evaluate them in a general model is an extremely complex task, as many individually factors are related to strength and deformation properties, such as moisture content and soil composition (Amantayev et al, 2017;Chen et al, 2017).…”

“…The occasional concentrated load (stone, root) acting on the edge of the tool is not taken into account (Sitkei, 1976). The value of the cutting force (Fb) is calculated with (7) considering the two active parts of the blade: the cutting force acting along the shorter wedge, the wedge perpendicular tot o advancing direction of the machine, and the cutting force acting along the longer wedge, the one parallel with the advancing direction. The first one noted with Fb1 from the moment of the contact with the soil can be considered a constant force and is calculated using (5).…”

“…𝐹 𝑏 = 𝐹 𝑏1 + 𝐹 𝑏2 (7) where: 𝜇 is the friction coefficient between the soil and the blade and it was chosen from (Sitkei, 1976) at a value of 0.61; and 𝛽 is the wedge angle of the blade, measured at 17°.…”

“…Table 3 contains the magnitude of the calculated forces, determined using Equations (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11). Table 3 The…”