Abstract
Springback refers to the elastic recovery which subject to a geometrical change when the metal undergoes deformation during the forming process. The experimental investigation of this paper is focused to analyze the behavior of spring back of nickel coated mild steel (NCMS) sheets during the air bending process. The hardeness and surface roughness was measured after coating. Experimental investigation have been conducted to resolve the influence of control parameters such as Orientations (θ), Width of the sheet (Ws), Punch travel (Tp), Holding time (Ht) and Punch Velocity (v) on spring back behavior. As a results, the incraese in Orientations, Width of the sheet, Punch travel andd Punch Velocity incraese the springback angle.
Highlights
Bending of sheet metal is the most prevalent and needed process in the production industry
This paper shows the usage of nickel coated steel sheet because of its higher corrosion resistance, heat resistance and it has attractive surface finish
Spring back angles are measured accurately from experiments conducted with a combination of control variables such as orientation of the sheet, strain hardening exponent, width of the sheet, punch travel, holding time and punch velocity
Summary
Bending of sheet metal is the most prevalent and needed process in the production industry. The effect of various control parameters such as coating thickness, orientation of the sheet, punch radius, die radius, die opening, punch velocity, and punch travel were studied on the springback behaviour of electrogalvanised steel sheets during air bending process which emphasized that increase in above parameters increases springback [3]. Finite element analysis was used to predict the influence of anisotropy on springback of Numisheet-2005 since better formability is achieved when anisotropy increases[9].The full factorial and analysis of variance methods in design of experiments shows that die and punch radii are the most dominant parameters which influence the springback of stainless steel sheets in V die free bending process[10]. The parameters considered in this paper are orientation of the sheet, width of the sheet, punch travel , holding time and punch velocity
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