The Study On Gouge Detection And Tool Path Planning When Machining Free-form Surfaces Using Three Different Cutters

With the development of modeling technology of free-form surfaces, the product with free-form surface is widely used in the modern life and the true production. More and more attentions are paid on the researching of gouge detection and tool path planning without interference in free-form surface machining.The thesis presents a novel interference detection methodology for machining free-form surfaces on three-axis NC machines, separately applies it to three different types of cutters such as the ball cutter,the flat-end cutter and the fillet-end cutter in order to confirm the methodology, and gives the flow charts and programs of s for interference detection. On the foundation of three interference detection models, the thesis implements the interference detection process using the corresponding arithmetic and gives the available results. In the end, based on analysing and comparing the interference results, two tool path generation methods without interference and the corresponding arithmetics are introduced.Given two types of examples of Bezier surface with lower or high curvature diversification, the thesis separately check the interference area on machining free-form surfaces using three types of cutters. By the analysis and comparison of the interference results using the three different cutters, the interference detection methodology is confirmed to be reasonable, not only can detect the local gouging areas but also can detect the global gouging area. At the same time, the interference detection methodology has the graveness influence on the selection of the cutter type and the size cutter radius.