Short Changes: in Indexable insert

摘要

The development of tungsten-carbide metalcutting tools in the first third of the 20th century represented a major manufacturing breakthrough in terms of increased metal-removal rates and tool life. Hard, long-lasting carbide cutting edges were brazed into steel holders and resharpened when worn. Resharpening, however, required removing the entire tool from the machine followed by handwork on a grinder, both of which took a fair amount of time. In addition, reground cutting edges were often dimensionally inconsistent, and overly aggressive or misapplied grinding could damage the edge and reduce its effectiveness or turn the tool into scrap.