摘要
毛刺是影响金属切削加工质量的主要因素之一。本研究以直角自由切削实验为基础 ,建立了两侧方向毛刺形成的数学 -力学模型 ,系统地揭示出两侧方向毛刺形成与切屑剪切应变的关系 ,给出了两侧方向毛刺形态转换的界限条件。并提出了被切削层金属沿刀具切削刃向工件两侧的自由表面产生塑性流动是形成两侧方向毛刺主要原因的新观点 ,得到了试验结果的证实。本文实现了金属切削中两侧方向毛刺形成与变化的预报 ,在精密与超精密加工和自动化加工中有广阔的应用前景。
Burr formation is an important factor of influence to metal cutting quality.A mathematical-mechanical model of two side-direction burr formation and translation was established based on orthogonal cutting,the relationship between burr formation and chip shear strain was given,and the critical condition of burr formation change pointed out. A new viewpoint was advanced,in which the plastic flow of metal layer to be cut becomes the cutting burr,and it was confirmed by experimental results. The paper realizes the prediction on the formation and change of the two side-direction burrs in metal cutting operation. It can find applications in precision or super-precision and automatic processing.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2003年第4期513-515,共3页
Acta Armamentarii
基金
国家自然科学基金资助项目 ( 5 9775 0 71
5 0 2 75 0 66)
关键词
毛刺
金属切削加工
数学—力学模型
塑性流动
超精密加工
manufacturing technology and equipment for machinery, metal cutting, two side-direction burr, mathematical-mechanical model, prediction, precision or super-precision machining
