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- W1497366296 abstract "T he global drive toward intermediate technology and sustainable development motivated the development of sheet metal rolling machine s for small-scale artisanal manufacturers . This paper presents the design, construction and evaluation of a sheet metal rolling machine for small-scale enterprises. The machine consists of three rollers; a rigid forming roller, a free floating roller and a drive roller arranged triangularly with two handles for shape-rolling. The roller s were made of galvanized metal pipe, 1 , 050 mm long, 76 mm diameter, each approximately, 3 mm thickness; a driving shaft 1 , 220 mm long, 16.6 mm diameter and 4 pieces of mild steel washers to provide support to shaft and also to limit the bending stress on the rollers . The entire system is mounted on a metal frame made from angled-iron bars which were secured in place with 19 mm bolt and nuts. The clamping and folding bearing blocks are 120 mm thick, the throat width is 1 , 200 mm, and maximum length capacity of the machine is 1 , 050 mm. The best roller aperture for material tested is 5.5 mm and maximum bend radius of 2.5 mm . The maximum length of material that gives the best circular shape is 620 mm. The average percentage acceptance of the machine by the artisan is 70.59% ( n =24) indicating that the technology is acceptable. Fifteen percent of the welders and 40% of tinsmiths are well acquainted with the functions of the machine. A total of 73.53% ( n =26) of the respondents are not acquainted ( t echnology awareness) with the shape rolling technology while 26.47% ( n =9) have a fair knowledge of the use of such machine s in metal rolling. The whole machine has a very small footprint, making it ideal for the home workshop and small factory alike. Keywords: m etal rolling, bushing, bearing block, capacity, bending load" @default.
- W1497366296 created "2016-06-24" @default.
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- W1497366296 date "2013-09-28" @default.
- W1497366296 modified "2023-09-23" @default.
- W1497366296 title "Development and evaluation of metal rolling machine for small-scale manufacturers" @default.
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