薄壁冷拔管内孔浮镗加工端口失圆分析  

Analysis on Out-of-roundness at Outlet End of Thin-wall Cold-drawn Tube after Floating Boring

作　　者：韦金钰 马宝 符江 梁婉婉 汤宝石 WEI Jin-yu;MA Bao;FU Jiang;LIANG Wan-wan;TANG Bao-shi(Xuzhou XCMG Hydraulics Co.,Ltd.,Xuzhou 221004,China)

机构地区：[1]徐州徐工液压件有限公司,江苏徐州221004

出　　处：《液压气动与密封》2021年第2期94-96,共3页Hydraulics Pneumatics & Seals

摘　　要：薄壁冷拔管作为液压油缸生产最主要材料,加工端口失圆成为制约生产瓶颈。针对冷拔管经浮镗后出口端失圆缺陷进行受力物理模型分析,确认卡盘夹紧力是造成失圆主要原因,并进行三组不同规格冷拔管进行试验验证,结果显示在薄壁冷拔管端口在卡盘夹紧力下发生较大塑性变形,经过刀具切削后,端口形成梅花状。通过加工工艺优化,采用对头浮镗加工工艺可消除缸筒出口端失圆缺陷。As the most important material in the production of hydraulic cylinder,the out of round at the outlet end of thin-wall cold-drawn tube becomes the bottleneck of production.According to the physical model analysis of the out of round defect of the cold drawn tube after floating boring,it is confirmed that the chuck clamping force is the main cause of the out of round defect,and three groups of cold drawn tubes with different specifications are tested and verified.The results show that the end of the thin-walled cold drawn tube has a large plastic deformation under the chuck clamping force,and the end forms a quincunx shape after cutting.Through the optimization of the processing technology,the out of round defects at the outlet of the cylinder can be eliminated by adopting the butt floating boring processing technology.

关 键 词：浮镗 夹紧力 失圆 加工工艺 

分 类 号：TH137[机械工程—机械制造及自动化]