Abstract: Metal stamping is a sheet metal manufacturing process in which products are made using press machine and press tools. Currently sheet metal stamping process is practiced in Ethiopian metal industries in large amount but, mostly they use the technology which has been introduced to the companies 50 years back. This results in larger loss in material, economy and machines. These paper work asses the loss in the existing manufacturing process and provides a better way which conforms to the modern technology. In the existing metal stamping process of our country’s metal industries large press machines are used with separate single operation press tools. But, in modern technology a progressive dies are used in which all the operations are integrated in one progressive press tool and all the operations are done successively. In this paper work a progressive press tool is designed using logopress 3 die design software for a part called receiver body which is produced in Gafat armament industry. In the existing system the part is produced after passing through 22 separate working stations, 48 parts are made per day and it costs 102 birr per part. But in the newly designed progressive press tool the part is produced in one progressive die, 7200 parts are produced per day and it costs 12.23 birr per part. Therefore, introducing modern progressive press tools using computer aided design/computer aided manufacturing software’s could make a huge difference in Ethiopian metal industries.Abstract: Metal stamping is a sheet metal manufacturing process in which products are made using press machine and press tools. Currently sheet metal stamping process is practiced in Ethiopian metal industries in large amount but, mostly they use the technology which has been introduced to the companies 50 years back. This results in larger loss in material,...Show More
Abstract: Enhancing the safety of any production system is a very important aspect in industries nowadays since it greatly reduces losses of resources. Moreover, safety ensures the health of the workers and a risk free environment. Often, most industries integrate safety in the useful life or during maintenance of their production systems. But this approach which is costly and sometimes causes the destruction of the existing system, seems to be irrelevant. A better solution is to consider safety in the process design of production system installation. To fulfill this aim, both probabilistic modelling of technical safety and modelling by Safety Features (SaF) give a better opportunity, and a step by step methodology to design safety production systems are proposed in this work. In order to be efficient in this approach, both proactive and reactive information are needed, and Safety Features (SaF) should be tools to sustain safety actors’ view in design collaborative communication. A case study has been lunched for illustration in hydroelectric power dam in Cameroon.Abstract: Enhancing the safety of any production system is a very important aspect in industries nowadays since it greatly reduces losses of resources. Moreover, safety ensures the health of the workers and a risk free environment. Often, most industries integrate safety in the useful life or during maintenance of their production systems. But this approach ...Show More
