摘要
为研究减振铣刀(变螺旋角和变齿距铣刀)在切削钛合金TB6过程中的颤振和切削力,采用变螺旋角、变齿距和标准铣刀切削钛合金TB6,比较不同的切削速度和磨损量下3种铣刀的颤振和切削力特性;分析在磨损量分别为0.1,0.2和0.3 mm时3种铣刀的颤振和切削力随切削速度的变化,研究切削速度对颤振和切削力的影响;分析切削速度分别在25,30和35 m/min时3种铣刀的颤振和切削力随磨损量的变化,研究铣刀磨损对颤振和切削力的影响;分析在相同的切削速度和磨损量下3种铣刀的颤振和切削力,研究刀具几何结构对颤振和切削力的影响。研究结果表明:3种铣刀在切削过程中都没有发生明显的共振,随着切削速度和刀具磨损量增加,3种铣刀的颤振和切削力均呈增大趋势;刀具几何结构对于颤振的影响显著,相对于标准铣刀,改变螺旋角和齿距可以有效减小颤振;刀具几何结构对切削力的影响不明显,3种不同几何结构铣刀在不同切削速度和磨损量下的切削力规律不一致。
In order to study the chatter and cutting forces of vibration-free milling cutters(variable helix and variable pitch milling cutters)in cutting titanium alloy TB6,titanium alloy TB6 was machined with variable helix,variable pitch and standard milling cutters.The chatter and cutting force characteristics of the three types of milling cutter were studied by comparing those of the milling cutters at different cutting speeds and tool wears.The influence of cutting speed on the chatter and cutting force of the three types of milling cutters was studied by analyzing the changing of chatter and cutting force with cutting speed when the wear amount was 0.1,0.2 and 0.3 mm.The effect of tool wear on the chatter and cutting force of the three types of milling cutters was studied by analyzing the changing of chatter and cutting force with tool wear when the cutting speed was 25,30 and 35 m/min.The influence of tool geometric structure on chatter and cutting forces was studied by analyzing the chatter and cutting forces of the three types of milling cutters at the same cutting speed and wear amount.The results show that there is no obvious resonance in cutting process with the three types of milling cutters.The chatter and cutting forces of the three types of milling cutters increase with the increase of cutting speed and tool wear.The influence of tool geometric structure on the chatter is significant.Compared with the standard milling cutter,the change of helix angle and pitch effectively reduces the chatter.The effect of tool geometric structure on the cutting force is not obvious,and the variation trend of cutting force of the three types of milling cutters is different at different cutting speeds and wears.
作者
刘建永
乔立红
陈五一
LIU Jianyong;QIAO Lihong;CHEN Wuyi(School of Mechanical Engineering and Automation,BeiHang University,Beijing 100191,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第2期349-358,共10页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51575029)~~
关键词
变螺旋角
变齿距
颤振
切削力
刀具磨损
variable helix angle
variable pitch
chatter
cutting force
tool wear
