INVESTIGATION ON INFLUENCE OF ANNEALING TEMPERATURES IN FORMABILITY AND DIMENSIONAL ACCURACY IN SPIF PROCESS ON STAINLESS STEEL 304

Abstract

Incremental forming is a sheet metal forming process characterised by high flexibility. This process is requires in-depth studies to know the influence and the optimization of certain process parameters. This paper is focused on matter formability in incremental forming. The different staring situation in the material and accordingly to the determination of forming limit diagrams for progressive forming operation. This paper presents the investigation on influence of annealing temperatures in formability and dimensional accuracy in single point incremental forming process in stainless steel grade 304 of 0.5 mm thickness is used for measuring strains. Screen printing method by circular grid mark was used for measure strains. These strains uses for generating forming limit curves stainless steel grade 304. total work is complete by forming cone shape by CNC milling machine for measuring strains, surface roughness, dimensional accuracy, shear thinning and forming time in the overall geometry.DOE have been read the effect of forming
dimentions such as: Annealing temperatures, tool diameter ,step size, feed rate and spindle speed these are the input parameters. Here in this process the deformed tools with hemispherical shapes are used. Investigation on influence of annealing temperatures in formability and dimensional accuracy in single point incremental forming process on stainless steel grade 304. The hardness of the stainless steel 304 is more so to reduce the hardiness heat treatment process (process annealing) is performed at 550°C, 575°C,
600°C and 625°C. Results are analyzed with ANOVA to know the influence of input parameters to output responses and TOPSIS and GRA multi objective optimization methods are used to predict the optimum results