机械加工实训报告.doc

7 4 1 2 3 - 4 5 1 - 1 2 3 4 2 1 2 3- 710~~~13 716 717 718 1 - - 630315 - - tcbar 16mn 20mm 5 r/mim m/mim mm/r mm 1 2 200 60~100 38~63 0.2~0.3 30 200~600 125~188 0.15~0.25 30 3 - - 2 7 c6140d kz250 l t s n v t 1 30 26 2.5 0.27 260 134 0.38 2 152.51407.53.5 50 2.5 0.23 260 134 0.83 2 ? - 22 2 2 , ,,, ,, ,! DD2 - - - !! ??? , . - - - - -- 2 - ! 0.001mm 0.03mm,, .0.3mm 1234 --- r3(1mm~1.5mm 0.2~0.8mmr3)r1.2 r1.2 r1.23.2r4 - 120 -- pvc r4 r1.2 r1.2 r1.20.1mm 3.2 30s5~10s