Ceramic Tips Machining

In general it is a continuous machining process that allows a single insert to be engaged in the cut for relatively long periods of time.

Ceramic tips machining.

Normal negative carbide tool holders have a top and side rake of 5 whereas when machining with ceramics it is recommended on materials under 45 hrc to use tool holders with 5 top rake 10 side rake. Howard here are seven tips for those considering a trial or re evaluation of ceramic tools. Machining double bearing od. Hard turning and milling.

Those ceramics will do hard steels but cbn is the best choice for hard steels above 50rc. I have used a white colored ceramic called macor which can be machined even with hss tools although it does wear them away a bit faster than tough steels. The black ceramics are usually silicon nitride and are best for very high rate machining of cast irons. Macor is one of the few ceramics that can be machined using regular metal working tools.

I used macor in applications where it had to withstand moderatly powerful laser hits and remain white. Depth of cut notching is more pronounced versus carbides. We show the machining of the od of a double race bearing od from a metric size to an imperial size using a ceramic wnma tip. Ceramic s melting point 3 700 f is higher than sintered carbide which means it can be driven through the cut faster.

Those whisker reinforced ceramics are best suited for high temp alloys. Based on a recent conversation with mr. When machining with ceramic tooling. A cutting material s performance is the basis for optimum machining of a workpiece.

While there is a learning curve to machining macor it is certainly achievable with the correct skill and patience. Turning is an almost ideal operation for ceramics. Higher cutting speeds of 600 4000 sfm are possible with ceramic tools sialon and sic whisker reinforced al 2o 3. Also when milling due to high rpm holders balanced in excess of the cut rpm must be used.

There is no need for coolant. If you do machine macor wear breathing protection. Prioritize surface speed when you re having problems it s human nature to slow down mr. The q32 is a valenite grade also one of those hot pressed silicon nitrides.

Ceramic machining ceramics can be made from several different types of hard metal oxides or nitrides. Additionally materials like silicon carbide sic may not fit the precise definition of a ceramic material but they can still be classified as part of the ceramic family.