L- 6 Forces in Manufacturing

L- 6 Forces in Manufacturing - Forces in manufacturing...

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Unformatted text preview: Forces in manufacturing processes Wyman-Gordon 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...
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L- 6 Forces in Manufacturing - Forces in manufacturing...

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