Single segment tests for the analysis of the core drilling process of concrete materials
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2015-11-19 |
| Authors | Michael Kansteiner, Dirk Biermann |
| Institutions | TU Dortmund University |
| Citations | 3 |
Abstract
Section titled āAbstractāDiamond impregnated tools, like drill bits or circular saws, are used for the machining of mineral materials like stones or the compound material concrete. Drill bits comprise several single diamond impregnated segments which are attached to the top of the tool body by brazing or laser welding processes. Fields of application of these tools can be found at the construction industry, the stone processing and the mining industry. The segments consist of a sintered powder-metal matrix and randomly distributed diamond grains. Hence, the number of exposed grains on the tool surface varies even for tools of the same specification. To simplify the analysis of the core drilling process with several segments and therefore diamonds in contact, tests with single segments were carried out. Thus, the number of exposed grains is reduced to a manageable number. To analyse the influence of grit size and concentration in diamond impregnated tools on the process behaviour when machining concrete materials, path-controlled tests on a machining centre were conducted. High performance concrete (C100) and reinforced concrete were machined and process forces were measured to quantify the influence of the tool specification. Additional information were gained by analysing the generated tool tracks.