Browsing by Author "Chen, MD"

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An analysis of force distribution in shear spinning of cone
(2005-06-01)
Chen, MD
;
Hsu, RQ
;
Fuh, KH
;
機械工程學系
;
Department of Mechanical Engineering
An analytic model for calculation of shear spinning force incorporate factor of over-roll (press down) of the blank is derived. The effects of blank thickness, roller nose radius, mandrel revolution and roller feed on the spinning force are discussed. Results obtained from calculation were compared with the experiment and other theoretical predictions. It is found that the present findings yield optimum results. (c) 2005 Elsevier Ltd. All rights reserved.
Effects of over-roll thickness on cone surface roughness in shear spinning
(2005-01-10)
Chen, MD
;
Hsu, RQ
;
Fuh, KH
;
機械工程學系
;
Department of Mechanical Engineering
A high quality of cone surface finish was achieved by carefully controlled over-roll thickness in the shear spinning process. In this study, blank thickness, roller nose radius, mandrel revolution, roller feed and over-roll thickness were taken as major process variables to investigate the effects of the above parameters on the surface roughness of cone shape products. From the experiment, several sets of experimental data were obtained, which in turn were used to construct regression equations for applied forces and product surface roughness. The results were verified by four extra spinning experiments. It is found that deeper over-roll combines with the thinner blank sheet, larger roller nose radius and slower roller feed, and are advantageous for obtaining smoother surface roughness. Over-roll of the blank in shear spinning is an effective way to improve the surface roughness of the product. (C) 2003 Published by Elsevier B.V.
Forecast of shear spinning force and surface roughness of spun cones by employing regression analysis
(2001-09-01)
Chen, MD
;
Hsu, RQ
;
Fuh, KH
;
機械工程學系
;
Department of Mechanical Engineering
A series of shear spinning experiments has been performed to produce axi-symmetric cones from blank sheet. The experiments investigated influences of roller nose radius, mandrel revolution and roller feed on the spinning force and the inside/outside surface roughness of spun cone. Statistical analysis was adopted to construct the regression equations governing these parameters. Independent experiments verified the findings. It was discovered that the established regression equations possess a significant degree of reliability. (C) 2001 Elsevier Science Ltd. All rights reserved.