Machining Economics for Lecture

Machining Economics for Lecture - 530.454 Manufacturing...

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530.454 Manufacturing Engineering Dr. Yury Ronzhes Machining Economics The original derivation of these machining economics equations is credited to W. Gilbert . The formulas allow the optimal cutting speed to be calculated for two objectives: (1) maximum production rate (2) minimum unit cost. Both objectives seek to achieve a balance between material removal rate and tool life. The formulas are based on a known Taylor tool life equation for the tool used in the op- eration. Accordingly, feed, depth of cut, and work material have already been set. The derivations will be illustrated for a turning operation. Similar derivations can be developed for other types of machining operations. Maximizing Production Rate For maximum production rate, the speed that minimizes machining time per production unit is determined. Minimizing cutting time per unit is equivalent to maximizing production rate. This objective is important in cases when the production order must be completed as quickly as possible. In turning, three time elements contribute to the total production cycle time for one part:
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Machining Economics for Lecture - 530.454 Manufacturing...

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