THE METHOD OF DETERMINING THE TENDENCY TO GALLING IN VIBRATION ASSISTED MICROFORMING

1 PRESZ Wojciech
Institution:
1 Institute of Manufacturing Technologies, Warsaw University of Technology – Narbutta 85, 02-524 Warsaw, Poland, EU, w.presz@wip.pw.edu.pl
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
450-456
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
30 views / 11 downloads
Abstract

The method of determining the tendency to galling in microforming processes is introduced. The method consists in the drawing process of the strip with a width of 1-3 mm and a thickness of 0.3-1 mm using a cylindrical tool with a radius of 2.5 mm. The process force as a function of sliding distance is recorded. On the basis of the character of the force course, the coefficient of galling tendency is determined. The process is carried out in a specially designed device placed on the table of testing machine. The device is equipped with a piezoelectric vibrator that allows the tool to be vibrated in accordance with the tape drawing direction with adjustable frequency and amplitude. The stand has been tested statically and dynamically, achieving the assumed construction parameters, i.e. the vibration amplitude in the range of 0-10 µm and the frequency 0-300 Hz. In the initial tests carried out, the effect of using vibrations with specific parameters on the tendency to galling and the surface condition of deformed materials was found.

Keywords: Microforming, galling, vibration-assisted
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