Optimization and selection of forming depth and pressure for box shaped Superplastic forming using grey based fuzzy logic

International Conference on Recent Advances in Materials, Mechanical and Civil Engineering

材料科学;机械制造;土木建筑工程

Babu, Jalumedi^1 ; Anjaiah, Madarapu^2 ; Varkeychen^1 ; James, Ajith^1

MED, SJCET, Choondacherry

Kerala, India^1

Department of Mechanical Engineering, Gurunanak Institutions, Ibrahimpatnam

Telangana

501506, India^2

关键词: Minimum thickness;    Model materials;    Parameter setting;    Strength to weight ratio;    Superplastic forming;    Superplastic materials;    Thickness variation;    Thinning ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/330/1/012086/pdf
DOI  :  10.1088/1757-899X/330/1/012086

来源: IOP

【 摘 要 】

Superplastic forming (SPF) is the first choice of designers for manufacturing parts with complexity as used in aircraft and automobile industries, where the strength to weight ratio is the main criterion. Superplastic forming of a sheet metal has been extensively used to produce the parts with greater complexities that are much stronger at the same time lighter than with other methods. Superplastic forming of sheets invariably results in thickness variation. Minimum thickness results at the portion where sheet comes in to contact with the die last. Pressure, forming depth and complexity of the part affect this thinning. The present investigation aims for simultaneous optimisation of forming depth and pressure of box shaped Superplastic forming using grey based fuzzy logic. In the present study Sn-Pb chosen; which is a model material for SPF to carryout experiments, the same results could be applicable for any other Superplastic material. Results revealed that depth at level1 (D1) and pressure at level 3 (P3) parameter settings minimize the time of forming, and maximize the thinning ratio, simultaneously.