Manufacturers Should Keep an Eye on Tungsten Carbide Cutting Tool Wear
- Details
- Category: Tungsten Information
- Published on Friday, 31 October 2014 18:54
Tungsten carbide cutting tool is a kind of consumable product and can wear out during cutting. Its wear can has three types: mechanical wear, thermal wear and chemical wear.
During cutting performance, tungsten carbide cutting tools wear out gradually when they cut down chips from workpieces. It has two main forms of wear: abrasion and breakage. Abrasion is gradually generated when tungsten carbide cutting tools conduct cutting performance continuously. Breakage includes brittle breakage and plastic breakage, such as tipping, cataclasm, desquamating and cracking.
The tungsten carbide cutting tools, after wearing out, will have lower cutting precision and higher surface roughness, which may result in the rising of cutting force, increasing of cutting temperature and even sympathetic vibration. And when these happen, its cutting ability will be greatly affected. Tools generally have three periods of wear: primary wear period, normal wear period, and rapid wear period. When the cutter has worn out to a certain extent, it can not be used anymore, which is called the blunt point. The time counted from a totally new tungsten carbide cutting tool being put into use to it reaching its blunt point is called tool service life.
The breakage of tungsten carbide cutting tools, like abrasion, is also a representation of tool losing its efficiency. If the cutter suffers too much force, it may break quickly and lose its cutting ability. In the above mentioned case, the so-called breakage happens. Actually, breakage is just a kind of abnormal abrasion.
When there is abnormal wear in tungsten carbide cutting tools during machining, immediate measures should be adopted, or it may cause workpiece scrap or even machine tool damage, etc. Therefore, manufacturers should keep a close eye on tungsten carbide cutting tool wear condition.
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