Knowledge transfer for the development and optimization of bonded, vibration-damping joints for single-lip drills, extended by aspects of practicality with regard to production and use of tools
Final Report Abstract
The results transfer project takes up the results obtained in the previous individual project on the basic feasibility of bonded joints on single-lip drills and their suitability for use, and serves to evaluate and develop a transfer to practical tool manufacture and application. In addition to the damping function, requirements resulting from the manufacturing process (coating process, short production times) and from the application (resistance to cooling lubricants, mechanical load) play a decisive role in the evaluation. At the beginning, a machining scenario was defined together with an industrial partner which reflects the typical application requirements for the joining point. Subsequently, test specimens were prepared for comparative investigations using 5 high-temperature resistant adhesives available on the market. As a result of static and dynamic analyses, as well as investigations into artificial aging in different cooling lubricants, one adhesive (Cotronics Resbond 952) was identified that exhibits sufficient suitability for use, but cannot match that of conventional brazed joints. Thermogravimetric analyses carried out in addition to this also leads to the conclusion that unavoidable outgassing from adhesives occurs in conventional PVD coating systems, which calls into question trouble-free coating. In final machining tests using a deep drilling oil, a basic suitability for use was demonstrated. The influence of the gap size, which was also investigated, is of minor importance.
Publications
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Ermitteln von Lagefehlern bei Einlippenbohrern/Determination of position errors in single-lip drills. wt Werkstattstechnik online, 111(05), 355-361.
Schweigart, Maximilian & Möhring, Hans-Christian
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Investigation of Single-Lip Deep Hole Drilling Tools with Adhesively Bonded Joints in the Context of Practical Conditions. Lecture Notes in Production Engineering, 310-318. Springer International Publishing.
Möhring, H.-C. & Schweigart, M.
