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VERSION:2.0
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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 26
SUMMARY:Analysis of the influence of tool geometry on the process of skew rolling of a railway car axle forging
DESCRIPTION:Railway axle forgings are most often made using two technologies, which include open forging and rotary forging. However, these methods are relatively inefficient and the products obtained are characterised by large allowances for machining. Therefore, new and more efficient forming methods involving rolling are being developed. Of the many methods, skew rolling appears to be particularly beneficial for this group of products.
The advantages of skew rolling prompted a study of this technology to determine the influence of selected technological parameters on the process and product quality. The work was carried out based on numerical calculations. The numerical model consists of 3 identical rollers, which are evenly distributed around the billet in the form of a bar section. The axes of the rollers are angled about the axis of the billet by a small angle. One end of the billet is fixed in a chuck that supports the rolling process. Three sets of rollers were used, differing in the geometry of the roll-forming zone (conical, radial concave and radial convex).
On the basis of the analysis of the results obtained, it was found that the shape of the roll has the greatest influence on the quality of the external surface of the product and the value of the maximum force applied to the chuck that pulls the billet during rolling. The use of a conical rollers results in forging with the highest external surface quality. A forging rolled using a concave rollers has the worst surface quality. With regard to force parameters, it was found that the lowest value of the maximum force applied to the chuck is required for the conical rollers. On the basis of the research carried out, it was concluded that the skew rolling technology analysed can be used to produce railway car axle forgings.

CLASS:PUBLIC
DTSTART:20230615T151000
DTEND:20230615T153000
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