The development of ultra micro crystalline diamond coated end mills

摘要

We would like to report on the development of one of our new products, an innovative diamond coated end mills and cutting performance. Aluminum alloys have lately been consumed more than ever in airplanes and automobiles for the purpose of decreasing the weight of structural materials. Copper alloys are used for the electrode of electric discharge machine (EDM) recently. EDM electrodes are required fine surface finishes because the surface quality of mold depends on accuracy of EDM electrodes. Soft materials such as aluminum and copper alloys have high viscosity and additionally activity. So during cutting aluminum and copper alloys we have sometimes adhesion between cutting tools and work pieces. Diamond film on tools is able to improve the reactivity to aluminum and copper alloys. But up to now the diamond film has a lot of course crystal and tend to supply rough surface finish on work pieces. We developed ultra fine crystalline diamond film on end mills by chemical vapor deposition (CVD) method. Now our aircraft, automotive and molding customers can get smooth surface finish of work pieces. Keeping ISO14001, we recommend oil free cutting with the new diamond coated cutting tools. Here I introduce background of development and cutting examples with the new diamond coated end mills.