通过镀锌板圆盘剪分切加工实验,研究镀锌钢板分切断面形貌特征及分切侧向间隙对剪切带、断裂带、塌角、撕裂角、毛刺等特征的影响规律。结果表明,侧向间隙是影响分切断面形貌的关键工艺参数,随着侧向间隙的增大,分切断面的剪切带高度迅速减小,塌角和撕裂角呈线性增大,而毛刺高度则先增大后减小再急剧增大。侧向间隙较小时,分切断面以塑性剪切带为主,表面质量和精度较高;侧向间隙较大时,以粗糙的断裂带为主,表面质量和精度较差;侧向间隙为板材厚度的1.25%～2.50%时,分切断面具有较为理想的表面质量。
The characteristics of the slitting surface morphology and the influence of the slitting clearance between the neighboring disc cutters on the morphology characteristics ,such as the shear area ,fracture area ,rollover ,tearing angle and burr ,were inves-tigated through the disc slitting machining experiments for the galvanized steel sheet in this paper . The experimental results show that the clearance is a key machining parameter affecting the slitting surface morphology . With the increase of the clearance ,the height of shear area decreases rapidly ,the rollover and the tearing angle increase linearly ,but the burr increases at first ,and then decreases ,and increases sharply again . When the clearance is smaller ,the slitting surface is dominated by the ductile shear area , and the surface has high quality and precision . At a large clearance ,most of the slitting surface is the rough fracture area ,the surface quality and precision is poor . The slitting surface is ideal when the
