金属带材少无毛刺精密分切加工新工艺分析

在分析金属带材分切加工过程及其主要缺陷和分切毛刺去除技术的基础上,提出将上下成对圆盘刀设置为轴向负间隙、径向正间隙,在分切过程中,金属板材表面形成剪切缺口但不分开,随后增设压力分断辊使残留材料层延性断裂分离,亦即塑性剪切压迫分离。通过设置上下圆盘刀间隙,使刃口作用区材料处于压应力状态而塑性剪切变形形成切口,再经分断辊压力作用,产生二次变形分离,实现少无毛刺精密分切加工。

New Technology Analysis on Metal Strips No-burr Precision Slitting

Based on analyzing the metal strips slitting processing and its main defects as well as the deburring technology,a new technology of metal strips precision slitting with no-burr was proposed.The upper and the lower pair of disc cutter to axial negative clearance and radial positive clearance were set so that the sheet metal surface formed shear incision that not separated,then additional pressure-roller made plastic shear oppression separation,which was ductile fracture separation of the residual material layer in the cutting process to control material stress and strain state.The no-burr precision slitting process is achieved by setting the upper and the lower pair of disc cutter clearance to make the material of cutting edge action zone in compressive stress state and form incision by plastic shear deformation.