New CNC-Brushing Technology for Automotive Parts Remanufacturing

Reconditioning is one of the most important remanufacturing steps. For reconditioning metal cutting processes with low material removal rates are preferably used. Further requirements for these reconditioning processes are low attainable surface roughness and high flexibility.

Brushing is a process that fulfills these requirements. In the past brushes were mostly used for cleaning and deburring. But with the development of new rotating brushing tools using grinding filaments even hardened materials have been machined. These grinding filaments made of polyamide with integrated hard grain like silicon carbide or aluminum oxide offer a wide range of new applications because a surface roughness Rz of less than 1 μm has been achieved.

To attain repeatable results and to automate the process these brushing tools were integrated into a CNC-machining center. For the machining of complex automotive parts and components like camshafts, crankshafts, camrings, rotary pistons and steering racks CAD/CAM-systems were used to program the CNC-machining centers.