Journal
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
Volume 9, Issue 5, Pages 10434-10446Publisher
ELSEVIER
DOI: 10.1016/j.jmrt.2020.07.067
Keywords
Skew rolling; CNC rolling mill; Forming defects; FEM; Experiment
Funding
- Lublin University of Technology-Regional Excellence Initiative - Polish Ministry of Science and Higher Education [030/RID/2018/19]
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The paper focuses on a new method for forming axisymmetric parts of considerable length in a CNC skew rolling mill. The laboratory rolling mill was used to conduct rolling tests for car axles (in scale 1:5). Although produced parts are free from internal defects such as fracture and shrinkage porosity, there occurs a local pile-up of the material leading to an increase in the workpiece diameter, as well as spiral grooves are formed, predominantly on conical surfaces. The impact of basic parameters of the skew rolling process on the formation of identified internal defects is assessed analytically and numerically. Experimental tests are performed to determine the effect of spiral grooves on the quality of final products, particularly forgings produced from skew rolled preforms. (C) 2020 The Author(s). Published by Elsevier B.V.
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