Q3). A block of 190mm length and 100mm width is to be machined in shaping process. The permissible cutting speed is 30m/min. maximum quick return ratio is 3:2 at the design value of stroke of 400mm. Calculate the time of machining of the block, assuming total depth of cut to be 8mm, L=1,+1+1,-40+190+20=250mm, B=ba+b+bo=10+100+10=120mm?

Q3). A block of 190mm length and 100mm width is to be machined in shaping process. The permissible cutting speed is 30m/min. maximum quick return ratio is 3:2 at the design value of stroke of 400mm. Calculate the time of machining of the block, assuming total depth of cut to be 8mm, L=1,+1+1,-40+190+20=250mm, B=ba+b+bo=10+100+10=120mm?

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter5: Turning

Section5.3: Machining Operations On The Lathe

Problem 5RQ: Calculate spindle RPM and machining time for cutting a 1.5" diameter 4" long at 225 SFPM using a...

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