Physics, 25.10.2019 01:43 destinyterrea

Atwo-spindle drill simultaneously drills a ½-in hole and a ¾-in hole through a workpiece that is 1.0 in thick. both drills are twist drills with point angles of 118°. the cutting speed for the material is 300 ft/min. the rotational speed of each spindle can be set independently. the feed rate for both holes must be set to the same value because the two spindles feed at the same rate. the feed rate is set so the total metal removal rate of both drills does not exceed 1.50 in3/min. determine (a) maximum feed rate (in/min) that can be used, (b) individual feeds (in/rev) for each hole, and (c) cutting time to drill the holes.

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Atwo-spindle drill simultaneously drills a ½-in hole and a ¾-in hole through a workpiece that is 1.0...

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