Reducing forces during drilling brittle hard materials by using ultrasonic and variation of coolant

C. Schopf; R. Rascher

doi:10.1117/12.2257106

11 November 2016 Reducing forces during drilling brittle hard materials by using ultrasonic and variation of coolant

C. Schopf, R. Rascher

Proceedings Volume 10151, Optics and Measurement International Conference 2016; 1015107 (2016) https://doi.org/10.1117/12.2257106
Event: Optics and Measurement 2016 International Conference, 2016, Liberec, Czech Republic

Abstract

The process of ultrasonic machining is especially used for brittle hard materials as the additional ultrasonic vibration of the tool at high frequencies and low amplitudes acts like a hammer on the surface. With this technology it is possible to drill holes with lower forces, therefor the machining can be done faster and the worktime is much less than conventionally. A three-axis dynamometer was used to measure the forces, which act between the tool and the sample part. A focus is set on the sharpness of the tool. The results of a test series are based on the Sauer Ultrasonic Grinding Centre. On the same machine it is possible to drill holes in the conventional way. Additional to the ultasonic Input the type an concentration of coolant is important for the Drilling-force. In the test there were three different coolant and three different concentrations tested. The combination of ultrasonic vibration and the right coolant and concentration is the best way to reduce the Forces. Another positive effect is, that lower drilling-forces produce smaller chipping on the edge of the hole. The way to reduce the forces and chipping is the main issue of this paper.

Citation Download Citation

C. Schopf and R. Rascher "Reducing forces during drilling brittle hard materials by using ultrasonic and variation of coolant", Proc. SPIE 10151, Optics and Measurement International Conference 2016, 1015107 (11 November 2016); https://doi.org/10.1117/12.2257106

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KEYWORDS

Ultrasonics

Virtual colonoscopy

Diamond

Diamond machining

Actuators

Current controlled current source

Geometrical optics

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