A Mechanistic Approach to Model Cutting Forces in Drilling with Indexable Inserts
2014 (English)In: Procedia CIRP, ISSN 2212-8271, E-ISSN 2212-8271, Vol. 24, no 0, 74-79 p.Article in journal (Refereed) Published
Holes are made in many industrial parts that need screws, pins or channels for passing fluids. The general method to produce holes in metal cutting is by drilling operations. Indexable insert drills are often used to make short holes at a low cost. However, indexable drills are prone to vibrate under certain circumstances, causing vibrations that affect tool life. Therefore, a good prediction of cutting-forces in drilling is important to get a good description of the cutting process for optimization of tool body and insert design. Reliable simulations of dynamic forces also aid in prediction of chatter vibrations that have significant effects on the quality of the manufactured parts as well as the tool life. In this paper, a mechanistic approach is used to model the cutting-forces. Cutting-force coefficients are identified from measured instantaneous forces in drilling operations. These coefficients are used for simulating torque around drill-axis, axial force and cutting-forces in the plane perpendicular to drill-axis. The forces are modeled separately for peripheral and central insert, which results in a detailed description of the cutting-forces acting on each insert. The forces acting on each insert are estimated by dividing the cutting edges into small segments and the cutting-forces acting on each segment are calculated. The total forces are predicted by summation of the forces acting on each segment. Simulated torque and forces are compared to measured cutting-forces for two different feeds. A good agreement between predicted and experimental results, especially in torque and axial-force, is observed.
Place, publisher, year, edition, pages
2014. Vol. 24, no 0, 74-79 p.
Indexable insert drill, Cutting-forces, Mechanistic force model.
Manufacturing, Surface and Joining Technology
Research subject ENGINEERING, Manufacturing and materials engineering
IdentifiersURN: urn:nbn:se:hv:diva-7025DOI: 10.1016/j.procir.2014.07.138ScopusID: 2-s2.0-84923168435OAI: oai:DiVA.org:hv-7025DiVA: diva2:765648
New Production Technologies in Aerospace Industry - 5th Machining Innovations Conference (MIC 2014)2014-11-242014-11-242016-02-09Bibliographically approved