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Bar Splitting, Cross-Wedge Rolling, Experiment.


This paper presents research works on a new method of wasteless splitting of metal round bars. This method is connected with rolling on the bar circumference of a groove

in the shape of letter V, and, later, on repeated rotary bending of the bar separate part, leading to the metal cracking. Special tools sets, in which a flat-wedged rolling mill
LUW-2 used at the Lublin University of Technology was equipped with, were applied in the splitting process. A typical set includes: mounting, cutting knife and bending pad. Laboratory tests confirmed the effectiveness of the worked out splitting method. This process was also analyzed theoretically, basing on finite element method (FEM). In calculations, the influence of process basic parameters on the cracking process was analyzed: knife forming angle, rolled groove depth, bending angle and length of the
cut bar part. The possibility of brittle fracture (on the basis of Saint-Venant hypothesis) and ductile fracture (on the basis of Cockroft-Latham) presence was analyzed.


Acta Mechanica Slovaca. Volume 15, Issue 1, Pages 36 – 43, ISSN 1335-2393


  Joining Car Body Steel Sheets Using the Clinching Method


[1] Pater Z., Tofil A. Experimental and theoretical analysis of the cross - wedge rolling process in cold forming conditions. Archives of Metallurgy and Materials 2007 vol. 52,

Issue 2 s. 289 - 297

[2] Tofil A. Research of process of mechanical splitting without waste of round metal bars. Ph. D. Thesis, Lublin University of Technology, Lublin 2008 (in Polish)
[3] Pełczyński W. T., Pełczyński T. A. Teoria procesów obróbki plastycznej. Część I Mechanika obróbki plastycznej. Warsaw University of Technology, Warsaw 1982 (in Polish)

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