Recently, productivity increase and cost reduction is the major target of industries due to the world-wide economic competition. Therefore manufacturing sector is also making all the efforts, one of them is the research and application of High Speed Machining (HSM).
HSM is so called to reduce real machining time through increase of machining speed(cutting speed and feedrate) and especially, it becomes very important in case that the portion of machining time is high.
As the finish operation of die cavity depends on the manual finish based on field experience, it is difficult to keep the constant quality of product and high machining time prevents reduction of production cost and elevation of productivity.
To solve these problems, the objectives of this study are minimizing form error and texturing surface roughness of machined surface by substituting manual finish with HSM as much as possible.
In order to achieve this goal, high speed spindle attached to common 3 axis machine tools implemented high speed milling economically, characteristics of high speed and high feed ball end milling, especially rubbing on the tip of ball end mill and expanding rubbing zone trajectory caused by cutting force, was verified.
Experiments which identified rubbing and low cutting speed effect on the region of ball end mill tip, revealed optimal set of feed and pickfeed which substitute manual finish with HSM.
Using these characteristics HSM of curved surface was executed with precision and effectiveness.
