What is it about?
It is about developing a proto-type water jet cutting machine (WJCM) to meet the requirements of small-scale industries using reverse engineering and redesign methodology. This paper particularly concentrates on the design of high pressure components such as water cylinders and sealing heads with the intention of simplifying their design for the manufacture of components using well known techniques in order to lower the cost.
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Why is it important?
The study is a first attempt to develop a low-cost WJCM with an operating pressures of 3500 bar as a main objective. It is important because it provides a novel reverse engineering and redesign methodology that is particularly suitable for proto-type development. It also applies it to a proto-type WJCM. It also uses well known design and manufacturing techniques in order to lower the cost. It provides displacement equations for predefined inner cylinder radius and for different cylinder materials. Radial equations and displacements in built-up cylinders under interface and internal operating pressure were also given. The developed algorithm of the Multi-Layer Water Cylinder Dimensioning Program was provided. Cylinder dimensions and radial displacements for both pre and post shrink-fit conditions (Pi . 3500 bar, factor of safety 1.2) were given for double layer intensifier.
Perspectives
Technical and economical requirements, as well as the main principle used on the double-acting intensifiers, constitute strong design constraints, not permitting drastic modifications. However, the application of reverse engineering and redesign methodology, and Multi-Layer Water Cylinder Dimensioning Programme together with other techniques provided variety of design changes easing assembly and manufacturing. Quantitatively, about 226 minutes' reduction on manufacturing times, considerable reduction on raw material and 6500 dollars' savings in spare parts have been obtained with the improvements made on the original design. Although the reduction obtained on assembly and disassembly times seems less, periodic changes of parts with limited service life greatly affects maintenance and operating costs of the machine. The techniques provided a systematic approach for proto-type product redevelopment, and can be applied for the enhancements of any proto-type machineries. We hope you find this article useful and apply the developed approaches and methodologies to other machineries. We will also be very pleased to see the applications of the study in other areas to redesign a final alpha proto-types.
Prof. Dr. Necdet Geren
University of Çukurova
Read the Original
This page is a summary of: Simplified design and manufacturing of high pressure components for a low-cost water jet intensifier using redesign methodology, International Journal of Materials and Product Technology, January 2004, Inderscience Publishers,
DOI: 10.1504/ijmpt.2004.005625.
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