Experimental determination of resistance to cutting rocks by a single cutter
The materials with which the cutters of milling working bodies interact, significantly differ from each other in their physical and mechanical characteristics. In this connection, in order to ensure an effective milling process in specific conditions, the type of cutters used and the layout of them on milling tools can be changed. To ensure a rational arrangement of the incisors when loosening the material, it is necessary to know the geometrical parameters of the chips produced when cutting a particular rock with a chisel, as well as the resistances that arise. Experimental determination of resistance to cutting rocks by a single cutter is carried out on a stand consisting of a frame, a cart, a cutter with a strain gauge suspension, drive hydraulic cylinders, a control panel and recording equipment. Calibration of the strain gauge of the stand is carried out by the external load applied to the tip of the cutter, using a dynamometer and turnbuckle. The design of the strain gauge suspension of the stand cutter allows to determine both the tangent and the normal component of the cutting resistance of the rock.