Method of machining by chip-forming workpieces of high-strength cast iron in particular of boring cylinder bores in a cylinder block

摘要

Process for machining workpieces from cast iron materials comprises using a cutting tool having a blade made from a polycrystalline cutting material, preferably diamond; and introducing a cooling medium, preferably compressed air, onto the contact zone between the blade and the workpiece during processing. Preferred Features: The cutting material is made from polycrystalline diamond produced using a physical process and/or a chemical vapor deposition process. Vermicular graphite and/or spherical graphite is used as the cast iron. The vermicular graphite contains 70-95 % perlite and 0.005-0.1 % titanium. The compressed air is introduced under a pressure of above 5 bar.