Engineering, 30.03.2020 20:54 angsoccer02
Gage blocks must be lapped for flatness and parallelism. Cluster of identical CNC lapping machines are available. Both sides of a block are lapped at a time; the lapping wheels are large enough to cover all gage blocks regardless of their lengths. Calculate the number of CNC lapping machines if we want to maximize the machine time by having only one single operator per cluster. ο· Machine availability: 85% (15% time for maintenance) ο· Rejection rate: 4% ο· Lapping time per block: 20 minutes ο· Time to walk between machines: 30 sec ο· Loading/unloading time: 90 sec
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Gage blocks must be lapped for flatness and parallelism. Cluster of identical CNC lapping machines a...
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