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Stabilirea procedeelor de prelucrare a suprafetelor
Pentru suprafetele care necesita o precizie ridicata s-au intocmit cate doua variante de proces tehnologic, iar pe baza coeficientilor kp si kR s-au ales variantele economice.
1'.Cota Æ130H7()
-varianta I:-strunjire de finisare:-Ra=3,2mm
-T=40mm
-strunjire de degrosare: -Ra=12,5mm
-T=250mm
kp= (-) kR= (-)
kp= kR=
-varianta II:-strunjire de finisare:-Ra=3,2mm
-T=40mm
-strunjire de semifinisare:-Ra=6,3mm
-T=160mm
-strunjire de degrosare: : -Ra=12,5mm
-T=400mm
kp= kR= (-)
kp= kR=
kp= kR=
2'.Cota Æ112H8(
-varianta I:-strunjire de finisare:-Ra=3,2mm
-T=54mm
-strunjire de degrosare:-Ra=12,5mm
-T=220mm
kp= (-) kR= (-)
kp= kR=
-variantaII:-strunjire de finisare:-Ra=3,2mm
-T=54mm
-strunjire de semifinisare:-Ra=6,3mm
-T=140mm
-strunjire de degrosare:-Ra=12,5mm
-T=350mm
kp= kR= (-)
kp= kR=
kp= kR=
3'.Cota Æ250H7()
-varianta I:-strunjire de finisare:-Ra=3,2mm
-T=46mm
-strunjire de degrosare:-Ra=12,5mm
-T=290mm
kp= (-) kR= (-)
kp= kR=
-varianta II:-strunjire de finisare:-Ra=3,2mm
-T=46mm
-strunjire de semifinisare:-Ra=6,3mm
-T=185mm
-strunjire de degrosare:-Ra=12,5mm
-T=460mm
kp= kR= (-)
kp= kR=
kp= kR=
4".Cota Æ320H7()
- varianta I:-strunjire de finisare:-Ra=3,2mm
-T=57mm
-strunjire de degrosare:-Ra=12,5mm
-T=360mm
kp= (-) kR= (-)
kp= kRS=
-varianta II:-strunjire de finisare:-Ra=3,2mm
-T=57mm
-strunjire de semifinisare:-Ra=6,3mm
-T=230mm
-strunjire de degrosare:-Ra=12,5mm
-T=570mm
kp= kR= (-)
kp= kR=
kp= kR=
Toate aceste rezultate se regasesc in tabelul urmator(tabel 3.1)
Tabel 3.1.
Numar criteriu |
Cota |
Varianta |
Kp |
Kr |
Varianta economica |
||||
kp1 |
kp2 |
kp3 |
kR1 |
kR2 |
kR3 |
||||
Æ130H7 |
I |
* |
|||||||
II | |||||||||
Æ112H8 |
I |
* |
|||||||
II | |||||||||
Æ250H7 |
I |
* |
|||||||
II | |||||||||
Æ320H7 |
I |
* |
|||||||
II |
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