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Natarajan, S.
- Evaluation of Formability of Tubular Material by Hydro Forming Technique
Authors
1 Dept. of Mechanical Engg., B S Abdur Rahman University, Vandalur, Chennai, IN
2 Dept. of Prod. Engg., M. I. T, Anna University, Chennai, IN
3 B S Abdur Rahman University, Vandalur, Chennai, IN
4 Dept. of Mechanical Engg., Anna University, Chennai, IN
Source
Manufacturing Technology Today, Vol 9, No 5 (2010), Pagination: 3-6Abstract
Hydro forming is a method of deforming sheet metal and tubular materials with the help of pressurized fluid medium using closed dies. In tube hydro forming process an internal fluid medium (inside the tube) serves as the forming medium and the tube is bulged into the desired shape through simultaneous application of axial feed and internal pressure. This paper aims to study the formability characteristic for aluminum tubular materials (A9 6063) for expansion zone geometry by considering various parameters such as axial feed, fluid medium, and semi cone angle of 20°. The formability of tube material was evaluated by varying the process parameters. In the experimental work, the tubular specimen was placed between the two halves of a split die and filled with oil as the forming medium. This tooling was mounted on a hydraulic press. The punch was advanced into the tube to increase the fluid pressure and to provide axial feed of the tube. The optimal expansion zone geometry was identified by various experimental trials, to get flaw free component.
Keywords
Formability, Tube Hydro Forming, Expansion Zone, Pressurised Fluid Medium.- Optimization of Wire Electrical Discharge Machining (WEDM) Process Parameters Using Desirability and Factor Analysis
Authors
1 Dept. of Industrial Engg., Anna University, Chennai, IN
2 Dept. of Production Engg., St. Peters Engg. College, Avadi, Chennai, IN
Source
Manufacturing Technology Today, Vol 7, No 12 (2008), Pagination: 17-22Abstract
The objective of this study is to select the optimal combination of machining parameters in Wire Electrical Discharge Machining (WEDM) process such that machining performance gets increased. Here the machining performances i.e. responses are measured in terms of Metal Removal rate (MRR), Surface Finish (SF) and Kerf (Cutting width). The most critical factors that affect performance measures are identified as Input peak voltage, Pulse-ON time, Pulse-OFF time, Dielectric fluid pressure, Wire feed, Wire speed and Servovoltage. Eighteen experimental trails based on L18 (21 × 37) orthogonal array are conducted and the corresponding responses are measured. Classical methods like factor analysis and desirability index are used for solving this multi-objective problem. Finally the results of two methods are compared and the best combination is chosen.- Numerical Simulation of Superplastic Forming of AA7475 Aluminum Alloy in a Circular Die
Authors
1 Department of Mechanical Engineering, College of Engineering, CEG, IN
2 A.C.College of Technology, Anna University, Chennai - 600025, IN