A method for machining of workpieces made of high-strength casting iron factory substances, in particular to the spindles of the cylinder bores in a cylinder block

摘要

The invention relates to a method for machining of workpieces made of high-strength casting iron factory substances, in particular to the spindles of the cylinder bores in a cylinder block of the casting iron factory substances ggv and ggg. For this purpose, cutting tools with at least one polycrystalline cutting materials and having geometrically defined cutting edge is used, wherein the processing in the continuous section, i.e. in the case of a continuous cutting engagement in the workpiece is carried out in connection with a supply of cooling medium during the machining. According to the invention, the cutting materials consist of polycrystalline diamond (pcd) and as a cooling medium is compressed air is used, the at least at the contact zone between the cutting edge and the workpiece is applied to the cutting edges cooling. A use of previous methods for the machining of workpieces made of a conventional cast iron with flaked graphite (gg) on the machining of workpieces made of iron or ggg leads to reduced tool service life and a lower productivity. With the combination according to the invention by cutting materials made of polycrystalline diamond (pcd) and compressed air as cooling fluid may, in contrast, the productivity and the service lives of the instruments to be increased considerably.