# Hola

Solo disponible en BuenasTareas
• Páginas : 3 (578 palabras )
• Descarga(s) : 0
• Publicado : 26 de octubre de 2010

Vista previa del texto
8.

A) Fresado (No. de filos 8 Ø 3’’)

Vc = 200 mts / min
Fc = 0.008 pulg. /rev

S = (200 (1000)) / (π (3’’ (25.4))) = 835.459 rev / min
F = (8) (835.459 rev/min) (.008 pul/rev) = 53.4693pulg/min

B) Contorno (No. de filos 4 Ø 1 ’’)

Vc = 200 mts / min
Fc = 0.008 pulg. /rev

S = (200 (1000)) / (π (1 ’’ (25.4))) = 2506.377 rev / min
F = (4) (2506.377 rev/min) (.006 pul/rev) =80.204 pulg/min

C) Taladro (1 filo, .75 – 1/13]= .673076)

Vc = 85 mts / min
Fc = 0.007 pulg. /rev

S = (85 (1000)) / (π (0.673076’’ (25.4))) = 1582.6 rev / min
F = (1) (1582.6 rev/min) (.007pul/rev) = 11.0782 pulg/min

C) Avellanado (30°, Ø .7)

Vc = 85 mts / min
Fc = 0.007 pulg. /rev

S = (85 (1000)) / (π (0.7’’ (25.4))) = 1521.72 rev / min
F = (1) (121.7289 rev/min) (.007pul/rev) = 10.6521 pulg/min

Recorrido y tiempos

No. de pasadas = Ancho de pieza / (Ø fresa (% eficiencia))
No. de pasadas = 8’’ / (3’’ (.75)) = 3 pasadas
L (recorrido) = 8 + 3 + .1 =(11.1) (6) = 66.6
L = 66.6 x = 1.24557 min
53.4693 1 min

B) Contorno
L = .1 + 2 + 1 + 2.53 + .333 + 4 + .666 + 4 + .666 + 4 + .333 + 2.53 + 1 + 2 + .666 + 2 + 2 + 2 + 2 + 1 + .1 + .333 + .666 +1 + 1 = 37.917

80.2040 1 min
37.917 x = 0.472756

L = (1 + .1 + (.3365/ tang 59°)) = (1.302212) (2) = 2.6044

11.0782 pulg 1 min
12.6044 pulg x = .235094 min

L = (1 + .1 + (.3365/ tang 59°)) = (1.302212) (2) = 2.6044

11.0782 pulg 1 min
12.6044 pulg x = .235094 min

7.

A) Fresado (No. de filos 8 Ø 3’’)

Vc = 180 mts / min
Fc = 0.008 pulg./rev

S = (180 (1000)) / (π (3’’ (25.4))) = 751.9131 rev / min
F = (8) (751.9131rev/min) (.003 pul/rev) = 18.0459 pulg/min

B) Contorno (No. de filos 4 Ø 1.5 ’’)

Vc = 180 mts / min
Fc =0.003 pulg. /rev

S = (180 (1000)) / (π (4 ’’ (25.4))) = 563.9348 rev / min
F = (4) (563.9348 rev/min) (.003 pul/rev) = 6.7672 pulg/min

C) Taladro (1 filo, .75, .4444)

.75

Vc = 90 mts / min...