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International Journal of Mechanical and Materials Engineering

, 11:10

First Online: 30 October 2016Received: 04 September 2016Accepted: 22 October 2016

Abstract

BackgroundShearing is a fast and inexpensive method to cut sheet metal that has been used since the beginning of the industrialism. Consequently, published experimental studies of shearing can be found from over a century back in time. Recent studies, however, are due to the availability of low-cost digital computation power, mostly based on finite element simulations that guarantees quick results. Still, for validation of models and simulations, accurate experimental data is a requisite. When applicable, 2D models are in general desirable over 3D models because of advantages like low computation time and easy model formulation. Shearing of sheet metal with parallel tools is successfully modeled in 2D with a plane strain approximation, but with angled tools, the approximation is less obvious.

MethodsPlane strain approximations for shearing with angled tools were evaluated by shear experiments of high accuracy. Tool angle, tool clearance, and clamping of the sheet were varied in the experiments.

ResultsThe results showed that the measured forces in shearing with angled tools can be approximately calculated using force measurements from shearing with parallel tools. Shearing energy was introduced as a quantifiable measure of suitable tool clearance range.

ConclusionsThe effects of the shearing parameters on forces were in agreement with previous studies. Based on the agreement between calculations and experiments, analysis based on a plane strain assumption is considered applicable for angled tools with a small up to 2° rake angle.

KeywordsSheet metal Experiment Shearing Force Clearance Angle  Download fulltext PDF



Autor: E. Gustafsson - L. Karlsson - M. Oldenburg

Fuente: https://link.springer.com/







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