Work Efficiency in a Double Cup Extrusion Process

다국어 초록 (Multilingual Abstract)

A double cup extrusion process (DCEP) has been analyzed numerically to investigate the characteristics of energy consumptions for a selected model material, AA 2024 aluminum alloy. The forming energy in a double cup extrusion process was analyzed in terms of ideal, redundant and frictional energy or work, which constitute of a total forming energy in metal forming process. Ideal and theoretical forming or deformation efficiencies were also examined for various process parameters chosen for analysis. The objective of this study is to investigate the influence of geometrical process parameters in DCEP on the characteristics of energy consumption or dissipation. It was revealed from this study that frictional energy was expected to be more dissipated for high reductions and low thickness ratios. It was also found that the theoretical work efficiency would decrease as the thickness ratio increases and the reduction decreases.

참고문헌 (Reference)

1 Campos, H. B., "Variation of Friction Coefficient with Die Semi-Angle in the Axisymetric Drawing of Copper" 2006

2 Jia, Z., "Three Dimensional Simulations of the Hollow Extrusion and Drawing Using the Finite Element Method" Ohio University 1994

3 Lee, C. H., "New Solutions to Rigid-Plastic Deformation Problems Using a Matrix Method" 95 (95): 865-873, 1973

4 심도식, "Investigation of Tension Force in Stretch Forming of Doubly Curved Aluminum Alloy (Al5083) Sheet" 한국정밀공학회 17 (17): 433-444, 2016

5 Van-Cuong Do, "Incremental Forming of 3D Structured Aluminum Sheet" 한국정밀공학회 17 (17): 217-223, 2016

6 International Cold Forging Group, "General Recommendations for Design, Manufacture and Operational Aspects of Cold Extrusion Tools for Steel Components (Document)"

7 Lee, H. Y., "Forming Load and Deformation Energy in Combined Radial Backward Extrusion Process" 487-490, 2012

8 Hwang, B. B., "Forming Load Characteristics in Combined Extrusion Process" 81 (81): 394-397, 2010

9 Fluhrer, J., "DEFORM-2D Ver. 8.1 User’s Manual" Scientific Forming Technologies Corporation

10 Lee, H. Y., "Analysis on Forming Energy in Backward Can Extrusion Processes" 539-542, 2012

11 Rubio, E. M., "Analysis of the Energy Vanished by Friction in Tube Drawing Processes With a Fixed Conical Inner Plug by the Upper Bound Method" 23 (23): 690-697, 2008

12 Hwang, B. B., "An Analysis on the Forming Load of AA 2024 Aluminium Alloy in Combined and Sequence Operation Process" 519-521 : 949-954, 2006

13 Ngaile, G., "A Tribo-Testing Method for High Performance Cold Forging Lubricants" 262 (262): 684-692, 2007

14 Arentoft, M., "A Study of the Double Cup Extrusion Process as a Friction Test" 243-250, 1996

15 Schrader, T., "A Critical Evaluation of the Double Cup Extrusion Test for Selection of Cold Forging Lubricants" 189 (189): 36-44, 2007