Title: Measuring clamping forces during turning via a sensorised steel ring

Authors: Manuel Estrems; Wilmer E. Cumbicus; Amaia J. Zabaleta; Mikel Arizmendi

Addresses: Materials and Manufacturing Engineering Department, Universidad Politécnica de Cartagena, Spain; Department of Mechanics, School of Engineering, Tecnun, Universidad de Navarra, Spain ' Department of Mechanics, School of Engineering, Tecnun, Universidad de Navarra, Spain ' Department of Mechanics, School of Engineering, Tecnun, Universidad de Navarra, Spain ' Department of Mechanics, School of Engineering, Tecnun, Universidad de Navarra, Spain

Abstract: The geometric tolerances of cylindrical workpieces are highly influenced by clamping forces. This relation is of special importance in slender workpieces such as thin rings. Better tolerances are achieved with lower clamping forces, but the disadvantage is that friction is reduced and the risk of slipping increases. Thus, in order to control the process, a key factor is achieving the lowest possible clamping force while still ensuring safety. Cylindrical parts are usually machined in lathes that have concentric plate chucks that are fixed either mechanically with wrenches or hydraulically by controlling pressure with valves. This paper proposes a method for measuring clamping forces in lathes during the turning process. The method allows the clamping force to be calculated from the torque applied by a dynamometric wrench or from valve controlled hydraulic pressure.

Keywords: clamping forces; strain gauges; ring deformation; FEM; Castigliano's theorem; roundness; torque wrench; chucks; lathes; thin rings; centrifugal forces.

DOI: 10.1504/IJMMS.2017.084798

International Journal of Mechatronics and Manufacturing Systems, 2017 Vol.10 No.2, pp.101 - 114

Received: 03 Feb 2016
Accepted: 25 Oct 2016

Published online: 20 Jun 2017 *

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