Parameter optimization and stretch enhancement of AISI 316 sheet using rapid prototyping technique

4th International Conference on Mechanical Engineering Research

Moayedfar, M.^1,2,3 ; Rani, A.M.^1,2 ; Hanaei, H.^1 ; Ahmad, A.^3 ; Tale, A.^4

Department of Mechanical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskanadar, Perak Darul Ridzuan

32610, Malaysia^1

Centre of Intelligent Signal and Imaging Research, Universiti Teknologi PETRONAS, Bandar Seri Iskanadar, Perak Darul Ridzuan

32610, Malaysia^2

Faculty of Engineering and Technology, DRB-HICOM University of Automotive Malaysia, Pekan, Pahang Darul Makmur

26607, Malaysia^3

Wind Energy Technology Institute, Flensburg University of Applied Sciences, Flensburg, Germany^4

关键词: Alternative solutions;    CNC milling machine;    Flexible manufacturing;    Incremental sheet forming;    Parameter optimization;    Quality improvement;    Rapid prototyping techniques;    Stress-strain diagram;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/257/1/012006/pdf
DOI  :  10.1088/1757-899X/257/1/012006

来源: IOP

【 摘 要 】

Incremental sheet forming is a flexible manufacturing process which uses the indenter point-to-point force to shape the sheet metal workpiece into manufactured parts in batch production series. However, the problem sometimes arising from this process is the low plastic point in the stress-strain diagram of the material which leads the low stretching amount before ultra-tensile strain point. Hence, a set of experiments is designed to find the optimum forming parameters in this process for optimum sheet thickness distribution while both sides of the sheet are considered for the surface quality improvement. A five-axis high-speed CNC milling machine is employed to deliver the proper motion based on the programming system while the clamping system for holding the sheet metal was a blank mould. Finally, an electron microscope and roughness machine are utilized to evaluate the surface structure of final parts, illustrate any defect may cause during the forming process and examine the roughness of the final part surface accordingly. The best interaction between parameters is obtained with the optimum values which lead the maximum sheet thickness distribution of 4.211e-01 logarithmic elongation when the depth was 24mm with respect to the design. This study demonstrates that this rapid forming method offers an alternative solution for surface quality improvement of 65% avoiding the low probability of cracks and low probability of crystal structure changes.