Abstract
Internally-spline sleeves have an increased attention since these parts serve as power transmission means in many industrial applications. This research presents using ball spinning process for producing internally-spline sleeves. The process was investigated experimentally and theoretically. The experimentally investigated variables were: the rotational speed of the mandrel 86, 604, 1146 and 1747 mm; the axial feed, 0.3, 0.6, 0.91 and 1.21 mm/rev; the cross in-feed 1.5, 2, 2.5, 3 and 3.5 mm. An analytical expression was derived to predict the deformation loads. The theoretically investigated variables were: the mentioned axial feed and cross in-feed at 604 mandrel rotational speed; the initial tube thickness of 3.5 to 8 mm with step 0.5 mm; the ball diameters of 16 to 32 mm with step 4 mm; the number of ribs was 4, 5, 6, 8, and 10. The effects of these variables on the forming load and the quality of formed sleeves were investigated. The results showed that, these variables affecting the forming load and product quality. The optimum values of these variables were determined. The theoretical results have been found to be in close agreement with experiment. (C) 2017 Elsevier Ltd. All rights reserved.