Question

A workpiece of 2000 mm length and 300 mm width was machined by a planning operation with the feed set at 0.3 mm/stroke. If the machine tool executes 10 double strokes/min, the planning time for a single pass will be?

Answer 1

Answer:

The planning time of the planner machine is 100 minute

Explanation:

Planning machine

A planning machine is a metal working machine that gives a flat surface to the work piece. Here the work-piece reciprocates and the feed is given to the tool.  A planning machine is used for heavy duty work and are often large in size.

 The machining time or the planning time of a planning machine is given by,

$t_{m}$ = $\frac{L_{w}}{N_{s}\times f}$

where, $L_{w}$ is the total length of travel of job

                                    = width of the job

                                    = 300 mm

            $N_{s}$ is number of strokes per min

                                     = 10 double strokes per min

            f is feed of the tool, mm per stroke

                                      = 0.3 mm per stroke

Therefore,  $t_{m}$ = $\frac{L_{w}}{N_{s}\times f}$

                                            = $\frac{300}{10\times 0.3}$

                                           = 100 min

Therefore the planning time is 100 minute.