Advantages of CBN Cutting Tools

The advantages that CBN cutting tools offer the metalworking industry more than offset there higher initial costs. primarily designed to machine very hard and difficult-to grind (DTG) metals, CBN tools are capable of greatly improving productivity, reducing scrap parts, and increasing the quality of the product. Let us examine the advantages of CBN super -abrasive cutting tools which can be used for turning and milling operations above Figer.

Long Tool Life. CBN : cutting tools have properties which resist chipping and cracking and provide uniform hardness and abrasion resistancein all directions. They may outperform conventional cutting tools by as much as 50 times. Reduced tool wear results in closer tolerances on workpieces, and fewer tool adjustments keep machine down-time to a minimum. The increased reliability of CBN cutting tools make them a major factor in automating machining opreations.

High Material-Removal Rates : Because CBN cutting tools are so hard and resist abrasion so well, cutting speeds in the range of 250 to 400 ft/min are possible on hardened steels and speeds of 5000 ft/min are possible in pearlitic cast iron. CBN cutting tools can with stand the high temperatures created by increased speeds and feeds. This results in higher material-removal rates with less tool wear, which reduces the total machining cost per piece.

Cutting Hard, Tough Materials : CBN cutting tools are so hard that they can efficiently machine steel with hardness of Rc 45 and above. CBN is also used for machining cobalt-base and nickel-base high-temperature alloys with hardness of Rc 35 and above. many of these materials are so hard and tough that they must be machined at relatively low speeds. Conventional grinding is also used but is a relatively slow metal-removal process. CBN cutting tools have a high resistance to impact and therefore can machine parts with interrupted cuts and tough abrasive scale.

High-Quality Products : Because the cutting edges of CBN cutting tools wear very slowly, they produce high-quality parts faster and at lower cost per piece than do conventional cutting tools.The need for the inspection of parts is greatly reduced as is the adjustment of the machine tool to compensate for cutting-tool wear maintenance. This results in better control over workpiece shape and size, which produces consistent part quality far beyond that possible with other cutting tools.

Uniform Surface Finish : Surface finishes of less than 10 micron. are possible, which often eliminate the need for relatively slow finishing operations such as conventional grinding

Lower Cost Per Piece : CBN cutting tools stay sharp and cut efficiently through long production runs. This results in better control over workpiece shape and size and fewer cutting-tool changes. This lowers manufacturing costs per piece by reducing inspection time and increasing machine uptime.