Title: New methods of steel ball rolling

Authors: Zbigniew Pater

Addresses: Mechanical Department, Lublin University of Technology, 36 Madbystrzycka Str., 20-618 Lublin, Poland

Abstract: The paper presents three new ball forming methods which have been developed at Lublin University of Technology, Poland. These methods include: cross-wedge rolling (CWR), multi-wedge cross rolling (MWCR), and cross rolling with upsetting (CRWU). The processes have been discussed using an example of a simultaneous forming of four balls with a diameter of 22 mm. The tools securing the forming processes of semi-finished balls are presented. Taking advantage of the FEM, the courses of rolling processes as well as distributions of temperature and strain in obtained products are shown. Conducted in laboratory conditions, the rolling tests have proven that the balls produced by the developed rolling methods meet the requirements for ball mill grinding media.

Keywords: cross rolling; cross-wedge rolling; ball forming; steel ball rolling; steel balls; FEM; finite element method; laboratory tests; temperature distribution; strain distribution; ball mill grinding.

DOI: 10.1504/IJMPT.2013.058959

International Journal of Materials and Product Technology, 2013 Vol.47 No.1/2/3/4, pp.12 - 22

Received: 05 Jan 2013
Accepted: 20 Aug 2013
Published online: 28 Jun 2014 *

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