自回转刀具切削SiC_w/LD_2铝基复合材料的切削力  

Cutting Forces of SiC Whisker Reinforced Aluminium Composite by Self-propelled Rotary Cutters

作　　者：王大镇[1] 刘菊东[1] 游玲[1] 刘华明[2] 

机构地区：[1]集美大学机械工程学院,福建厦门361021 [2]哈尔滨工业大学机电工程学院,黑龙江哈尔滨150001

出　　处：《应用基础与工程科学学报》2010年第4期677-685,共9页Journal of Basic Science and Engineering

基　　金：福建省自然科学基金计划资助项目(E0640012)

摘　　要：针对自回转刀具切削碳化硅晶须增强铝基复合材料时的切削力特性问题,采用自回转刀具和圆形固定刀具切削SiC_w/LD_2铝基复合材料、45钢和铝合金,用Kistler测力系统检测和分析切削力.试验结果表明,自回转刀具与圆形固定刀具相比平均背吃刀抗力F_p减小了30%—60%,峰值减小了70%—80%;随着切削速度的增加自回转刀具的切削力呈快速减小的趋势,其切削力系数K_p<1.圆形固定刀具的切削力亦呈减小的趋势,但切削力系数Kp>1;随着进给量的增大,固定刀具的切削力增加剧烈,其切削力系数K_p>1,而自回转刀具的切削力增幅很小,且切削力系数K_p由大于1转变为小于1,减小的幅度明显;自回转刀具是加工中低体积分数铝基复合材料时的高性能低成本刀具之一,宜采用高切削速度、大进给量的方式进行加工.To solve the problem of the cutting force performances in cutting SiC reinforced aluminium composites,SiCw/LD2 composite,45 steel and aluminium alloy were turned using self-propelled rotary cutters and fixed circular inserts.The cutting forces were measured and analyzed using a Kistler dynamometer.The experimental results showed that the average value and the peak value of the radial thrust cutting force F_p using self-propelled rotary cutters were lower 30%—60% and 70%—80%than that of using fixed circular inserts respectively.In increasing the cutting speed,the cutting forces using self-propelled rotary cutters were fast reduced and the coefficient Kp of cutting force was less than one.With the increase of the cutting speed,the cutting forces using fixed circular insert were similarly reduced,but the coefficient Kp of cutting force was more than one.In increasing the feed rate,the cutting forces using fixed circular inserts will be rapidly increased and the coefficient Kp of cutting force was more than one.Contrarily,the increments of the cutting forces using self-propelled rotary cutters when increasing the feed rate was slowly increased and the coefficient Kp of cutting force will be rapidly changed from more than one to less than one.In machining the composites reinforced with SiC whisker of moderate or lower volume fractions,the self-propelled rotary cutters are found to be one kind of tools with low cost high cutting performance.Higher cutting speed and bigger feed rate should be adopted in machining.

关 键 词：铝基复合材料 自回转刀具 切削力 

分 类 号：TH161.1[机械工程—机械制造及自动化]