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06:57 Oct 4, 2018 |
Polish to English translations [PRO] Tech/Engineering - Metallurgy / Casting / welding | |||||||
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| Selected response from: geopiet | ||||||
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2 +1 | wedge-shaped heating, heating wedge |
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Summary of reference entries provided | |||
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heat wedge flame straightening |
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wedge-shaped heating, heating wedge Explanation: Technika prostowania przez nagrzewanie - punkty, wstęgi, kliny Nagrzewanie elementu w kształcie klina należy rozpoczynać od wierzchołka do podstawy klina Rys. 5. Prostowanie kształtowników przez nagrzewanie http://www.pspaw.pl/index.php/pspaw/article/viewFile/397/401 - page 4 ----------- Spot, line or wedge-shaped heating techniques can all be used in thermal correction of distortion. Apart from spot heating of thin panels, a wedge-shaped heating zone should be used, (Fig. 5) from base to apex and the temperature profile should be uniform through the plate thickness. Fig. 5 Use of wedge shaped heating to straighten plate https://www.twi-global.com/technical-knowledge/job-knowledge... ----- Correction by heating - https://goo.gl/PQeVa1 - "Design of Welded Steel Structures: Principles and Practice" |
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3 hrs |
Reference: heat wedge flame straightening Reference information: delimited, pointed and long. The ratio (width of wedge base line to wedge height) in the web should be 1:3. The wedge height, depending on the extent of deformation, should be selected in such a way that the wedge tip only just exceeds the neutral axis of the profile. In this way, the stiffness of non-heated material zones is used as a means of restricting expansion. If a greater deformation is required, the wedge shape is drawn further across the neutral axis. The width-height ratio remains 1:3. In this case, additional restriction of the expansion process would favour deformation. The shape of the heat wedge must be drawn on both sides of the component to ensure, as far as possible, that both sides of the wedge volume are heated exactly opposite each other If heating is displaced, a wedge-shaped heating zone cannot be achieved, only an undefined heated workpiece area. This, in turn, does not lead to the desired straightening result. The procedure for profiles is the same. The heat wedge is drawn on the component. Heating begins in the web from the fillet towards the wedge tip. The dwell time for heating the wedge tip must be very brief so that the heat cannot spread too much, in contrast to the fillet. The wedge base line determines the width of flange heating. The fillet area of profiles, the area in which the most material accumulates, is heated most effectively from the top side of the flange (Figure 17). To prevent steps between the heated flange zone and the non-heated flange areas, it is recommended that the flame temperature be kept somewhat lower in the edge zone of the heated flange. https://www.boconline.co.uk/en/images/Fundamentals-of-Flame-... |
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