Oblik kesme işleminin ısıl modellenmesi

Machining processes such as turning, milling, drilling, grinding etc. are the most widespread processes for producing final shapes of the discrete parts. In today?s competitive manufacturing environment, increasing productivity without sacrificing from part quality is an obligation. Considering machining from this point of view, physics based modelling of machining process and optimization of process parameters gain importance.The aim of this thesis is to develop a novel temperature prediction model that is applicable to oblique cutting processes in variable cutting conditions. Thesis consists of two main parts. In first part mechanics of oblique cutting and mechanics of turning process is presented. Orthogonal to oblique transformation procedure is used in mechanical analysis. Mechanical and geometric outputs of first part are utilized in thermal model as simulation inputs. In second part of the thesis, thermal modelling approach is introduced. A finite difference method based approach is followed in modelling of cutting temperatures. Oblique cutting process model is applied to prediction of turning temperatures by splitting turning geometry in to oblique cutting segments. This block by block modelling approach allows representing a complex problem with simpler subparts. Then, tool, chip and workpiece temperatures are calculated.Predicted temperature values are validated by using the data available in literature. Simulation results showed that average temperatures on rake face are in acceptable agreement with experimental results. Proposed solution method can be utilized in selecting optimum processing parameters, tool geometry and tool material in order to avoid excessive tool temperatures.