An Improvement of Flow Forming Process for Pressure Vessels by Four Rollers Machine

Authors: P. Sawitri, S. Cdr. Sittha, T. Kritsana

Abstract:

Flow forming is widely used in many industries, especially in defence technology industries. Pressure vessels requirements are high precision, light weight, seamless and optimum strength. For large pressure vessels, flow forming by 3 rollers machine were used. In case of long range rocket motor case flow forming and welding of pressure vessels have been used for manufacturing. Due to complication of welding process, researchers had developed 4 meters length pressure vessels without weldment by 4 rollers flow forming machine. Design and preparation of preform work pieces are performed. The optimization of flow forming parameter such as feed rate, spindle speed and depth of cut will be discussed. The experimental result shown relation of flow forming parameters to quality of flow formed tube and prototype pressure vessels have been made.

Keywords: Flow forming, Pressure vessel, four rollers, feed rate, spindle speed, cold work.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1094675

References:

[1] Peter Groche, David Fritsche, "Application and modelling of flow forming manufacturing process for intertally geared wheels”, International Journal of Machine Tools & Manufacturing, 2006, No.46, p.1261-1265.
[2] Luciano Pessanha Moreira, Geovani Rodrigues, Luiz C. Rolim Lopes, "Finite element analysis of the tube flow forming process”, International Journal of Mechatronic and Manufacturing Systems, 2008, Vol.1, No.2/3, p.218 -231.
[3] M. Sivanandini, S.S. Dhami, B.S.Pabla, 2012, Flow Forming of Tubes-A Review, International Journal of Scientific & Engineering Research, Vol.3, Issue 5, p.1-11.
[4] M lakshmana Rao, Dr T V L N Rao, M V Ramana, Dr C S K P Rao, 2008, A Study on the Influence of Flow Forming Parameters of Maraging Steel Tubes, IE(I) Journal-PR, Vol.89, p.10-13.
[5] Hamid R. Molladavoudi, Faramarz Djavanroodi, 2011, Experimental study of thickness reduction effects on mechanical properties and spinning accuracy of aluminum 7075-O, during flow forming, International Journal Advance Manufacturing Technology, Vol.52, p.949-957.
[6] C.C. Wong, J. Lin, T.A. Dean, 2005, Effects of roller path and geometry on the flow forming of solid cylindrical components, Journal of Materials Processing Technology, Vol.167, p.344-353.
[7] M.J. Roy, D.M. Maijer, Robert J. Klassen, J.T. Wood, E. Schost, 2010, Analytical solution of the tooling/workpiece contact interface shape during a flow forming operation, Journal of Materials Processing Technology, Vol.210, p.1976-1985.
[8] Bikramjit Podder, Chandan Mondal, K. Ramesh Kumar, D.R. Yadav, 2012, Effect of perform heat treatment on the flow formability and mechanical properties of AISI4340 steel, Materials and Design, Vol.37, p.174-181.
[9] S. Sittha, S. Thanapong, N. Teerapong, 2013, A Study of Materials for Pressure Vessel in Defense industries, Word Academy of Science, Engineering and Technology, Issue 81, p.643-647.
[10] S. Sittha, K. Nattapat, P. Sawitri, 2011, Manufacturing of Rocket Motor Case by Flow Forming Technology, Dtech, Vol. 1 Issue 1, p.94-102.
[11] National Aeronautics and Space Administration: Solid Rocket Motor Metal Cases, NASA SP-8025, 1970, p.17-20.
[12] K.M. Rajan and K. Narasimhan, 2002, An Approach to Selection of Material and Manufacturing Processes for Rocket Motor Cases Using Weighted Performance Index, Journal of Material Engineering and Performance, Vol.11, p.444-449.
[13] K.M. Rajan and K. Narasimhan, 2003, Failure Studies on Flow Formed High Strength Pressure Vessel: A Case Study, Journal of Pressure Vessel Technology, Vol.125, p.253-259.
[14] Steverding, B.:The Feasibility of High Strength Alloys for Rocket Motor Cases, Metallugia, p.55-59, 1963.
[15] K.M. Rajan, P.U. Deshpande, K. Narasimhan, "Effect of heat treatment of perform on the mechanical properties of flow formed AISI 4130 Steel Tubes – a theoretical and experimental assessment”, Journal of Materials Processing Technology, Vol.125, p.503-511.
[16] M. Jahazi, G. Ebrahimi, "The influence of flow-forming parameters and microstructure on the quality of a D6ac steel”, Journal of Materials Processing Technology, 2000, Vol.103, p.362-366.
[17] K.M. Rajan, P.U. Deshpande, K. Narasimhan, 2002, Experimental studies on bursting pressure of thin-walled flow formed pressure vessels, Journal of Materials Processing Technology, Vol.125-126, p.228-234.
[18] K.M. Rajan and K. Narasimhan, 2001, An Investigation of the Development of Defects During Flow Forming of High Strength Thin Wall Steel Tubes, Practical Failure Analysis, Vol.1(5), p.69-76.