Stroud Neergaard

The diamond tool is typically utilized in micro-machining as it can withstand the micro hardening of the workpiece surface throughout micro-machining. For alternative ways to look at the situation, consider looking at: prototype machining process. This micro-hardening creates sufficient resistance to break the tool bit effortlessly in micro milling, but not a diamond tool. Micro-machining employing diamond tool could be performed at higher speeds and typically fine speeds to create great surface finish such as mirror surfaces and high dimensional accuracy in non-ferrous alloys and abrasive non-metallic components.

Even so, if a diamond tool had been to be utilized to reduce steel, a single of the most widespread engineering supplies employed in industries, the diamond tool will face severe tool put on. Whilst diamond only softens at 1350 degree Celsius and melts at 3027 degree Celsius, and is also the hardest material in the world, it has a weakness. Diamond succumbs to graphitization, which means that it will adjust its crystal structure to graphite crystal structure at 200 degree Celsius in the presence of a catalyst metal such as carbon steel and alloys with titanium, nickel and cobalt.

There have been various attempts to enhance the tool life of the diamond tool even though cutting steel so as to increase the efficiency and profitability of this operation. Such processes incorporate micro-cutting the steel workpiece in a carbon-wealthy gas chamber as properly as a cryongenically cooled chamber. Even so, these techniques call for expensive gear modification and restrict direct supervision of the micro-cutting procedure.

The latest breakthrough came when the diamond tool was subject to ultrasonic vibration throughout micro-cutting. It has been shown that a diamond tool topic to ultrasonic vibration can reduce the steel nicely enough to make a mirror surface finish with acceptable tool life. The ultrasonic vibration at the diamond tool tip permits the tool face to cool down considerably during the cutting approach and delays the chemical reaction between the diamond tool and the steel workpiece. As a outcome, the diamond tool life is improved by a few hundred times.

For example, a single crystal diamond tool with feedrate five micron/revolution, cutting speed zero to 5m/min and depth of reduce 10 micron was attached to a ultras