Thesis (M.S.)--Ohio University, June, 1987. / Title from PDF t.p.

Thesis (M.S.)--University of Missouri-Columbia, 2004. / Typescript. Includes bibliographical references (leaves 97-99). Also available on the Internet.

Thesis (M.S.)--University of Missouri-Columbia, 2004. / Typescript. Includes bibliographical references (leaves 97-99). Also available on the Internet.

Typescript (photocopy). / Includes bibliographical references (leaves 77-78).

Retrofits of hydraulic and mechanical deep drawing presses often stop with the exchange of the electrical and the hydraulic parts. But that is only half the job. The use of high definition control electronics, faster CPUs and more dynamic hydraulic actuators, offers the opportunity of redesigning the already existing control concepts of the press. In this paper we present how the performance of the press, i.e. the control quality, can be increased for hydraulic ram and cushion axes. The improvement in control quality is achieved through the use of intelligent closed-loop and open-loopcontrol algorithms. Therefore, creasing and crack formation can be reduced, since enhancements in control quality have direct influence on the quality of the forming process. Results will be shown for hydraulic drawing cushion control, i.e. pressure control, as well as for hydraulic ram control, i.e. position, velocity and parallelism control. We present findings for hydraulic cushion control of a mechanical press type Arisa S-4-1600-470-230-LDE (link-drive press with 10 hydraulic cushions) and for ram- / cushion-control of hydraulic press type Müller-Weingarten ZE2100 (multi-curve press with 8-point cushion).

M. Tech. Industrial Engineering / In industrial manufacturing systems, one often encounters situations in which motion in two, three or more hydraulic cylinders actuators need to be synchronized. The need for the design of a reconfigurable bending press machine (RBPM) control system prompted the research in the development of an automatic and synchronized system, suitable for the press tool operations, versatile in raising and thrusting of multiple- cylinders with odd numbers. The aim of this research is to design and develop a controller that will control all the modules of a reconfigurable bending press machine for bending box-type sheet metal components.

M. Tech. Industrial Engineering. / Discusses the main objectives of this research are to; analyse the current state of press brakes technology ; develop a press brake concept using the Screw Jack System applying DFM (designing for manufacturability) principles and to fabricate a mini prototype Screw Jack Press Brake.

D. Tech. Industrial Engineering. / Aims to develop new optimized press brake concepts using Reconfigurable Manufacturing System (RMS) principles. The objectives of the research are articulated as follows: Research and identify part/ product families currently being manufactured on existing bending press tools and the respective technologies used. Design new press brake concepts and possible reconfigurations to be incorporated in future bending press tools based on part/ product families. To design the library of modules for the bending press tools based on new concepts and reconfiguration mechanisms formulated. To manufacture prototype(s) based on new concepts and perform experimental tests to evaluate performance of the designs.

Retrofits of hydraulic and mechanical deep drawing presses often stop with the exchange of the electrical and the hydraulic parts. But that is only half the job. The use of high definition control electronics, faster CPUs and more dynamic hydraulic actuators, offers the opportunity of redesigning the already existing control concepts of the press. In this paper we present how the performance of the press, i.e. the control quality, can be increased for hydraulic ram and cushion axes. The improvement in control quality is achieved through the use of intelligent closed-loop and open-loopcontrol algorithms. Therefore, creasing and crack formation can be reduced, since enhancements in control quality have direct influence on the quality of the forming process. Results will be shown for hydraulic drawing cushion control, i.e. pressure control, as well as for hydraulic ram control, i.e. position, velocity and parallelism control. We present findings for hydraulic cushion control of a mechanical press type Arisa S-4-1600-470-230-LDE (link-drive press with 10 hydraulic cushions) and for ram- / cushion-control of hydraulic press type Müller-Weingarten ZE2100 (multi-curve press with 8-point cushion).