金属带材无毛刺精密分切加工材料变形过程研究  

Studying Plastic Deformation in Burr-free Disc Slitting Process of Metal Sheet

作　　者：阎秋生[1] 石现景 路家斌[1] 

机构地区：[1]广东工业大学机电工程学院,广州510006

出　　处：《机械科学与技术》2016年第1期98-103,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51175090;51575112)资助

摘　　要：针对金属板材的圆盘剪分切加工,提出采用塑性剪切压迫分离工艺得到平整无毛刺的分切断面,基于精密分切加工实验建立了有限元模型,采用DEFORM-2D进行仿真,通过金属流变组织和材料静水应力的变化情况分析了镀锌板的变形过程和断面形貌的形成,仿真得到的分切断面特征与实验结果具有良好的一致性。研究了圆盘剪径向间隙和轴向间隙对无毛刺精密分切工艺的影响,发现当轴向间隙一定时,径向间隙为板材厚度的20%时分切断面质量最好;轴向间隙小于板材厚度的2.5%才能实现塑性剪切压迫分离工艺,在合理的轴向间隙范围内其值变化对分切断面形貌特征影响不明显。Aiming at the disc slitting process of sheet metal,the technique of plastic shearing oppression slitting is proposed to obtain a smoot and burr-free slitting surface. Based on the experiments of precision slitting,a 2D model is established with the DEFORM software. The plastic deformation of the galvanized sheet and the formation of the slitting surface morphology features are analyzed by the changes of the metallographic structure and hydrostatic stress in the process of slitting. The simulation results are in a good agreement with the experimental results. It is studied that the influence of the radial clearance and axial clearance between the two disc cutters on the burr-free slitting process. It can be proved that when the axial clearance is determined and the value of radial clearance is20% of the sheet thickness,the best slitting surface can be getten. And the plastic shearing oppression slitting could only be used when the radial clearance is less than 2. 5% of thickness. The axial clearance does not have an obvious influence on the slitting surface in a reasonable range.

关 键 词：塑性剪切压迫分离 塑性变形 有限元 形貌 静水应力 

分 类 号：TG386[金属学及工艺—金属压力加工]