Research on the burr-free interrupted cutting model of metals
Research on the burr-free interrupted cutting model of metals
复制标题
金属无毛刺断续切削模型研究
DOI：
10.1016/j.jmatprotec.2021.117190
复制
发表时间：
2021-05-06
影响因子：
6.3
通讯作者：
Chen, Junyun
中科院分区：
文献类型：
--
作者：
Wu, Fenghe;Liu, Zijian;Chen, Junyun
在金属零件的断续切削中，一般在出刀面边缘产生毛刺，这将严重影响使用和装配性能。增加去毛刺工艺是解决毛刺问题的一种方法，但会增加经济和时间成本，阻碍生产线的自动化。本研究主要针对主动式毛刺控制技术，以防止在切削过程中产生毛刺。在分析毛刺形成机理的基础上，建立了无毛刺理论模型，指出改变工件出刀面角度是实现无毛刺断续切削的关键。采用有限元法对切削毛刺进行了数值模拟。在模拟过程中，设置了从30度到90度的10个出口表面角度梯度，应力图和最终毛刺形状与理论模型吻合良好。对7075-T651铝合金进行了切削试验，并在理论模型的指导下实现了无毛刺断续切削。通过实验验证了理论模型预测的无毛刺状态的临界出射面角。该研究为解决断续切削毛刺问题提供了理论和实践依据。
In the interrupted cutting of metal parts, burrs are generally produced at the edge of the exit surface, which will seriously affect the use and assembly performance. Adding deburring process is a way to solve the problem of burr, but it will increase the cost of economy and time, and hinder the automation of production line. This study focused on the active burr control technology, which can prevent burr formation during the cutting process. A new burr-free theoretical model was established based on the analysis of burr formation, and it indicated that changing the exit surface angle of the workpiece was the key to realize burr-free interrupted cutting. The finite element method (FEM) was applied to simulate the cutting burr. In the simulation, ten gradients from 30 degrees to 90 degrees were set for the exit surface angle, both the stress plot and the final burr shape were presented in good agreement with the theoretical model. A cutting experiment of aluminum alloy 7075-T651 was carried out and the burr-free interrupted cutting was realized under the guidance of the derived theoretical model. The critical exit surface angle of burr-free state was also verified by the experiment, which was predicted from the theoretical model. This study provided a theoretical and practical basis for solving burr problem in interrupted cutting.