刀具齿数对7050铝合金薄壁筋铣削残余应力的影响

2018-06-15

作者：翁小飞1，杨吟飞1，傅勇2，兰惠2，黄志平1，李亮1 单位：1南京航空航天大学；2江西洪都航空工业集团有限责任公司

摘要：在相同刃口参数和切削参数条件下，采用整体硬质合金螺旋立铣刀进行7050铝合金薄壁筋高速铣削试验，并通过X射线衍射法测量在不同刀具齿数和刃口跳动下的表面残余应力。结果表明:两齿刀具切削产生拉应力，三齿刀具切削产生压应力；刃口跳动量小的刀具所产生切削残余应力值波动小；提高切削线速度将增大应力值并使其向拉应力方向偏移。

关键词：薄壁筋；表面残余应力；高速铣削；刀具齿数

中图分类号：TG54；TG115.22；TH161文献标志码：A

Influence of Tooth Number on Residual Stress of Thinribbed 7050 Aluminum Alloy Part

Weng Xiaofei，Yang Yinfei，Fu Yong，Lan Hui，Huang Zhiping，Li Liang

Abstract:Through employing the same edge parameter and cutting condition，the experiments on the highspeed milling of thinribbed 7050 aluminum alloy parts with different end mill diameters and tooth numbers are carried out.The surface residual stress is measured by Xray diffraction method.The results show that tensile residual stress is produced with a twotooth tool while the compressive stress is produced with a threetooth tool.The stress fluctuation is smaller with a smaller tool edge run out.With the increase of the cutting speed，the residual stress will be increased and the residual stress tends to shift toward the tensile stress.

Keywords:thinribbed part；surface residual stress；highspeed milling；tooth number