【摘要】 通过对切削区速度场的分析，建立了切削过程的速度场模型．根据此模型，导出了二元切削时求解剪切角Φ的简化公式．在二元切削模型的基础上，首次给出了三元切削时法向剪切角Φｎ的新模型．最后得出结论：无论是二元还是三元切削，剪切角Φ（或Φｎ）主要取决于刀具前角γｏ（或γｎ）和被切削材料在剪切滑移前后的速度之比｜Ｖ｜／｜Ｖｃ｜．更多还原

【Abstract】 Analysing the cutting speed field near the shear zone, a speed model about cutting process isestablished in the paped According to the model, a simple formulate is developed with that two dimentionalshear angle can be calculated: and three dimentional shear angle is presented for first time. Conclution is wethertwo dimentional or three dimentional cutting, the shear angle will be depend on tool orthogonal rake (or toolnormal rake ) and speeds before and after shear zone.更多还原