Improvement of Drilling Possibilities for Machining Powder Metallurgy Materials

This research paper aims to investigate the drilling capabilities of the sintered powder metallurgy parts. Due to their special properties, these materials are of distinguished importance in today's world. Exploiting said properties enables us to create self- lubricant bushing as well as special alloys. In order to evaluate the investigated parameters, comparative experiments were conducted. Both the tool materials and the application of cooling varied in the experiments, in the framework of which cutting force, drilling torque and tool wear were measured. The hole geometry (diameter accuracy and circularity) was also checked. Owing to the environmentally friendly machining conditions, the experiments can be carried out by means of dry machining, air cooling and minimal quantity lubrication. According to our results, it was the cutting force and the tool wear that the cooling of the tool had the greatest effect on in the case of powder metallurgy materials.