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分析了用常规方法设计、制造的成形车刀加工团推面时产生的双曲线误差，导出了用棱体和圆体成形车刀加工时误差表达式，讨论了工件和刀具雏角、刀具前角及工件轴向尺寸对工件双曲线误差的影响并提出以两段拆线或两段曲线刀刃替代一段直线或曲线刀刃的改进措施。
The error of hyperbolic curves produced by the forming turning tools designed and manufactured by the conventional method is analyzed. The error expressions of the machining of the turning tools with the prism and the circular body are derived. Angle and the influence of workpiece axial dimension on the hyperbolic error of workpieces and the improvement measures of replacing a straight or curvilinear blade with two stitches or two curved edges are proposed.