Entwicklung von Werkzeugen und Prozessstrategien zum fertigungs- integrierten thermomechanischen Ran

FKM 2004
Issue No. 282
Project No. 242

Abstract:

The aim of this research project was to investigate the technical use of grinding hardening technology for internal cylindrical machining for the martensitic surface hardening of steels. In this new process, the heat generated during grinding is used for process-integrated surface layer hardening and therefore allows heat treatment to be integrated into the production line. In the investigations carried out, the influencing variables of tool specification, cooling lubricant supply, cutting speed, infeed, grooving speed, feed rate and dressing conditions were varied and evaluated on the basis of the grinding forces, tool wear and the depth of hardening. A uniform depth of the heat-affected zone of up to 1.7 mm was achieved in the workpieces with simultaneously high residual compressive stresses in the hardened edge zone. All workpieces were free of surface defects such as cracks. To improve the surface quality, a finishing process was carried out with the same grinding wheel after the grinding hardening process. This allowed the roughness after grinding hardening to be reduced from around Rz = 14