These three elements include-actual cutting time (T c), total tool changing time (T ct) and other handling or idle time (T i). Basically overall or total machining time (T m) is the summation of three different time elements closely associated with the machining or metal cutting process. In today’s competitive market, time is equivalent to cost. Therefore abrupt increase of cutting speed and feed rate is not a feasible solution rather, an optimization is necessary. Hence, cutting tool is required to change frequently, which will ultimately impose a loss for the industry as a result of idle time for changing tools.
However, this may lead to reduced cutting tool life due to faster wear rate and higher heat generation. As long as conventional machining is utilized, in order to fulfill first requirement (faster production rate), the cutting speed and feed rate should have to be increased. Now-a-days the primary goal of industries is to manufacture the product at a faster rate but at minimal cost and that too without sacrificing product quality. For effective planning of the entire production, overall machining or cutting time must be incorporated. Relevant steps such as removal of material, setting the job and cutting tool, and dispatching the machined job consume substantial amount of time, which are at least not negligible.
Ultimate objecting of machining is to give intended shape, size and finish by gradually removing material from workpiece.
Machining or metal cutting is one important aspect of the production system.
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