Investigation on the Exit Burr Formation in Micro Milling

Micromachines

Zhongwei Chen¹  Xian Wu¹  Kai Zeng¹  Jianyun Shen¹  Feng Jiang²  Wenjun Luo³  Zhongyuan Liu³ 

[1] College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China;Institute of Manufacturing Engineering, Huaqiao University, Xiamen 361021, China;Xiamen Xiazhi Technology Tool Co., Ltd., Xiamen 361115, China;

关键词: micro milling;    exit burr formation;    burr width;    burr shape;   

DOI  :  10.3390/mi12080952

来源: DOAJ

【 摘 要 】

The burr on micro part has harmful effect on the dimensional accuracy and service performance. The original control of exit burr formation during micro milling is desirable and advisable. In this paper, the formation mechanism of exit burr was studied based on the varying cutting direction during micro milling. Three exit burr control strategies were concluded, the material properties embrittlement, the support stiffness increasing and machining parameter optimizing operations. Then, micro milling experiments were carried out to investigate the exit burr morphology and size. It was found that the exit burr formation was attributed to the change of material flowing path at the exit surface, which was caused by the negative shear deformation zone that was induced by the discontinuous shape features. Different exit burr morphologies were classified; the triangle exit burr type was caused by the varying exit burr growing direction along the exit surface. The optimal machining parameters in micro milling to obtain a small exit burr were suggested.

【 授权许可】

Unknown