关键词: 螺旋曲面, 成形加工, 干涉, 刀具廓形, 反向补偿

Abstract: If interference exists between helical surfaces and forming cutter in forming process,the precision of helical surfaces forming will be affected.Therefore,interference compensation before machining can improve the accuracy of helical surfaces forming.According to the contact principle of helical surfaces contact and forming tool,the mathematical model of forward and inverse calculation between helical surfaces and forming tool was established,and a kind of interference reduction method based on error inverse compensation was proposed.A new virtual computation profile of helical surfaces was formed by reverse interference compensation on the theoretical workpiece profile,and then a forming tool that could reduce the interference error was obtained by using the virtual computation profile to reverse calculation of forming tool section and iterating.A mathematical model of helical surfaces forming interference was proposed,and its efficiency and applicable scope were discussed.Through a calculation example,the effectiveness of the proposed method was verified.

Key words: helical surface, forming process, interference, tool profile, inverse compensation