This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: Forces in manufacturing processes WymanGordon 50,000 ton forging press, Worcester http://files.asme.org/ASMEORG/Communities/History/Landmarks/5662.pdf Objecitves • Appreciate forces in manufacturing – Origins and consequences • Understand forces in machining by chip formation – solve numerical problems Forces manufacturing • Origin – Deformation – Friction – Machine operation (overhead) • Consequences – Part deflection – Tool deflection – Work • Heat • Wear Turning straight down view tool chuck not shown side cutting edge angle (scea) feed workpiece rotation tool rake face T1 uncut chip thickness T1= feed cos(scea) cutting edge Koshal, D. (1993). Manufacturing Engineer's Reference Book . Shear angle from geometry Shear angle From Geometry: tan Φ = r t cosα / (1 r t sin α) Chip thickness ratio r t = t 1 /t 2 Vc – cutting velocity Rake angle t 2 t 1 Machining forces – decomposition rake angle friction angle To decompose forces use the vector dot product With the unit vector in the desired direction...
View
Full Document
 Winter '08
 Brown
 Force, rake angle, shear angle, Fc Ft, Ft Fc tan Fc Ft tan, Shear angle t1

Click to edit the document details