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upset |
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upset
1. a tool used to upset a bar or rivet; swage 2. a forging or bar that has been upset in preparation for further processing upset [′əp‚set (noun); əp′set (verb)] (engineering) To increase the diameter of a rock drill by blunting the end. (materials) A defect occurring in timber as a result of a severe blow that breaks the fibers across the grain of the wood. (metallurgy) A localized increase in the cross-sectional area of a metal during working, caused by the application of pressure; enables a head to be formed on fasteners such as bolts. (mining engineering) A narrow heading connecting two levels in inclined coal. A capsized or broken skip. upset 1. To shorten and thicken by hammering, as a bar of heated metal struck on the end. 2. In the region of a weld, a localized increase in volume resulting from the application of pressure. 3. A defect in timber due to a severe blow that breaks the fibers across the grain. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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