,,,所以,)(4.70044.01166.02116575.09.0NFP???????而纵向切削力FfnFcyxpKvfafFffFfFfCF?,其中,782.1K1K065.02.1x500mF??????krfFFfnFyNC,,,,,所以,)(8.159582.11166.0250065.021NFP???????,取机床导轨与床鞍之间的摩擦系数μ=0.1,则切削力在纵向进给方向对进给机构的作用力)(8.1886)4.7004.2209(1.08.1595)(FFNFFPCf????????而机床的纵向进给机构可承受的最大纵向力伟3530N(见《切削用量简明手册》表1.30),故机床进给系统可正常工作。工序10车退刀槽、粗车φ45mm的外圆表面、半精车φ45mm的外圆表面、切断。1、加工条件机床:CA6140车床,刀具:高速钢车刀。2、计算切削用量(1)车退刀槽1)切削深度取单边余量Z=4mm,分两次加工,mmap2?2)进给量根据《切削用量简明手册》表1.-7,选用rmmf/24.0?3)计算切削速度cvmin)/(9.181181.08.021.124.02607.22V4.015.01.0mfaTCvvyxpmvc??????????4)确定主轴转速min)/(118519.1810001000rdvnwcs???????按机床说明书,选min/125rn?所以实际切削速度min/201000511251000mndvw???????5)切削工时按《机械加工工艺手册》表2.5-3)(5.252512mmdlw???,mmKalrp2290tan22tan1??????,0032??ll,(min)62.1224.012525.25321?????????inflllltm(2)粗车φ45mm的外圆表面1)切削深度取单边余量Z=2mm,分两次加工,mmap1?
全文预览
