Deep drawing using a novel hydromechanical tooling

• Published in: International journal of machine tools & manufacture Vol. 49; no. 1; pp. 73 - 80
• Main Authors: Lin, J., Zhao, S.D., Zhang, Z.Y., Wang, Z.W.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 2009; Elsevier
• Subjects: Applied sciences; Computational fluid dynamics; Deep drawing; Exact sciences and technology; Forming; Hydraulic pressure; Hydroforming; Hydromechanical drawing; Killed steels; Low carbon steels; Mathematical analysis; Mathematical models; Mechanical engineering. Machine design; Metals. Metallurgy; Other forming methods; Piston pressurizing structure; Pistons; Pressurizing; Production techniques; Tooling; Deep drawing; Hydroforming; Hydromechanical drawing; Piston pressurizing structure; Die; Hydrodynamic pressure; Metal; Steel; Experimental study; Modeling; Pressurizing; Tooling
• ISSN: 0890-6955; 1879-2170
• DOI: 10.1016/j.ijmachtools.2008.07.014

A new type of passive-pressurized hydromechanical deep-drawing (PHDD) tooling with two pistons is designed and manufactured: one piston installed inside is used to enhance the die pressure, the other is used to promote the radial-pushing pressure, which provides the radial-pushing and blank-holder forces. The advantage of the PHDD tooling is that it needs no external pressurizing source. Aimed at motions of the two pistons, a mathematical model is presented to calculate the hydraulic pressures of all chambers. Furthermore, relationships between those hydraulic-pressure zones are developed. Hydraulic deep-drawing experiment on 1.00-mm-thick 08Al steel was conducted, and a drawing ratio of 2.63 was obtained. Further analysis shows that the design of the new tooling is reasonable and the hydraulic pressure used in all experiments is in good agreement with the analytical results.