Manufactured goods, is a complicated form, little capicity and many kind, usually is cut by a simple tool which has high work efficiency. The tool for cutting work is generally necessary for 3∼4 times higher hardness than normal cutting material but...
Manufactured goods, is a complicated form, little capicity and many kind, usually is cut by a simple tool which has high work efficiency. The tool for cutting work is generally necessary for 3∼4 times higher hardness than normal cutting material but a tool for cutting a cemented carbide doesn't exist except a diamond or CBN tool. Especially, a diamond tool has a specific property that wearing resistance is decreased by high-tempareture carbonization and the price of diamond or CBN tool is so expensive that to find the cutting condition for cuffing a cemented carbide is very important. The most hydraulic valve, multi-stage hole work, require the exact circularity and surface roughness in honing. The movement to make a importing tool in korea is getting up due to the high cost.