Entwicklung einer Software zur Auslegung der Schneideinheiten von mechanisch schneidenden Untertagebergbaumaschinen

The aim of this thesis is the development of a tool for the design of mechanically cutting underground mining machines with cutting tools to achieve a strong performance in the form of a high advance and extraction rate. The result was a software solution that enables the design to be carried out, in other words the correct type and number of cutting tools as well as their position and alignment can be found. With this data, which represents the output of the function, the tool layout of the drum can be fully determined for manufacturing. The software was created using Matlab and the graphic visualization of the cutting unit was carried out in NX. In the course of the design, different cutting modes such as shear-down, shear-up and sumping can be selected. Three different models are available for calculating the cutting force. Alternatively, a user-defined model can be specified in form of a formula. A concept was developed within the scope of this work, which allows the cutting depth to be calculated in discrete steps of 0.1° of the drum rotation angle using a graphical approach. Four functions are used for the design, which can plot the resulting torque curve as well as the individual torque curves of the picks. This allows statements to be made about the uniformity of the load and the torque requirement during the cutting process. Furthermore, the number of picks engaged during one rotation of the drum can be plotted in 0.1° steps, and a plot of the drum contour as well as a flat pattern of the drum can be created.
The design of cutting units is a complex task for which there are currently few tools available. The software developed in the course of this work is intended to help facilitate this task and achieve better results in terms of machine performance.