关键词: 正偏心, 正交车铣, 切削层几何形状, 解析模型, 侧刃, 底刃

Abstract: For orthogonal turn-milling, as the cutting layer geometry of positive eccentricity was not considered, the overall change rules of cutting layer geometry were difficult to describe. To solve the above problems, formation processes of cutting layers were analyzed statically without consideration of kinetic influences based on motion law of orthogonal turn-milling. The mathematic models of cutting layer geometry of orthogonal turn-milling with positive eccentricity were set up and some mathematical expressions were gained such as entrance and exit angle, cutting thickness and cutting depth of side and bottom cutting edges. The above mathematic models were verified by experiments. Finally, some influences of cutting parameters on cutting layers of tool were researched. The above studies provide quantitative analyses for changes of cutting layer geometry on positive eccentricity orthogonal turn-milling and detailed theoretical guidelines for cutting forces and chatters.

Key words: positive eccentricity, orthogonal turn-milling, cutting layer geometry, mathematic model, side cutting edge, bottom cutting edge