Drilling

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EXAMPLES 2 0 d i a 5 2 1 0 0
EXAMPLES Solution: For determining processing time for components requiring more than one operation, always first determine the best possible sequence for manufacturing the component. To manufacture component shown in Figure 6.9, which requires three operations – facing, drilling and turning – any of the following sequences can be used (a) Facing (b) Turning (c) Drilling (a) Turning (b) Facing (c) Drilling (a) Drilling (b) Turning (c) Facing (a) Drilling (b) Facing (c) Turning The total time required to manufacture the component would be the sum of all individual operations. Now, let us consider the first sequence, i.e. facing, turning and drilling and compute the time required to complete the job.
Page 1 and 2: DRILLING AND ALLIED OPERATIONS INTR
Page 3 and 4: DRILLING OPERATION Drill Workpiece
Page 5 and 6: CONDITIONS ON DRILLING MACHINE SPEE
Page 7 and 8: MRR IN DRILLING OPERATION MRR = (
Page 9 and 10: MACHINING TIME MACHINING TIME IS G
Page 11 and 12: BORING OPERATION Relative rotation
Page 13 and 14: REAMING CARRIED OUT TO MAKE THE HO
Page 15 and 16: To produce more accurate holes, the
Page 17 and 18: TAPPING PROCESS Tap Workpiece
Page 19 and 20: COUNTERBORING AND SPOT FACING Count
Page 21 and 22: COUNTERSINKING Machined hole 82° C
Page 23 and 24: EXAMPLES Example 6.1 A hole is bei
Page 25: EXAMPLES Example 6.3 A job shown i
Page 29 and 30: Time for Drilling: EXAMPLES Length
Page 31 and 32: EXAMPLES Alternate sequence of ope

Drilling

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