This is a draft cheat sheet. It is a work in progress and is not finished yet.
TEORIA DE CORTE
Cp=T/6 σ |
ɣn ≡ desprendimiento |
h1 ≡ viruta no def |
f ≡ avance [mm/rev] |
(malo) 3≤T/2I≤10 (caro) |
αn ≡ incidencia |
h2 ≡ viruta def |
fz ≡ avance filo [mm] |
ap ≡ prof corte [mm] |
βn ≡ filo |
φn ≡ inclinacion del filo |
S ≡ vel del husillo [rpm] |
S ≡ vel del husillo [rpm] |
μ = tgρn =F/N |
Rt = f2/8r |
V ≡ vel de corte [m/min] |
T=C/V^1/n |
T=K/(V1/n1 f1/n2 ap1/n3) |
1/n1 > 1/n2 > 1/n3 |
ξ= h2/h1 ≡ fact recalcado |
tgφn = cosɣn/(ξ-senɣn) |
2φn + ρn - ɣn = π/2 |
I = N/N0 *100 maquinabilidad |
h1 = f*senκr |
κr ≡ posición |
εr ≡ punta |
Fc filo= ks*A0=ks*D/2*f/2 |
Vf=V*f/(π*D) |
Fa = Nc*sen κr |
Pa = Fa*Vf |
Fr = Nc*cos κr |
Fc = ks*A0=ks0*h1-m |
Pc = Fc*V |
Nc = Fc*tg(ρn - ɣn) |
Fc broca = z*Fc filo |
P = z*Fc filo |
|
M=Fa*p/2π |
ECONOMIA DE MECANIZADO
Productividad = Produccion obtenida/factores utilizados |
si tc<tm -> tm≈tc =l/Vf |
tfi=tprep/nºpieza + tcarga + top + tdesc + tnp |
top =tconf + tch + tno conf -- tt = tm + tc/T*trf + tnp |
Ctmec = Cmec + Cch + Cnp + Cpre + Cmat + Cutill |
Cmec= ċtm -- Cch=ċtch -- Cnp=ċ*tnp |
Am - directa = Cmaq/Años -- simple =D(1+tasaa) |
Ct= ċtm+tc/T(ċtrf+Chf)+ċtnp |
-- compuesta = D*(1+tasa)a |
ċ = (Am/nturnos+nºoperCtelab)1/(1-ηcostes)1/(horasocup) |
enteriza -- Chf = (Ch+nreaf*Creaf)/(nreaf+1) |
plaquitas -- Cportah/(nplaqvidanfilos)+zCplaq/nfilos |
Tmp=(1/n1)*trf |
|
|
|