出典:Wiktionary
出典:『Wiktionary』 (2009/05/25 02:02 UTC 版)
spot welding (uncountable)
出典:Wikipedia
出典:『Wikipedia』 (2011/03/13 17:36 UTC 版)
Spot welding (RSW) is a process in which contacting metal surfaces are joined by the heat obtained from resistance to electric current flow. Work-pieces are held together under pressure exerted by electrodes. Typically the sheets are in the 0.5 to 3 mm (0.020 to 0.12 in) thickness range. The process uses two shaped copper alloy electrodes to concentrate welding current into a small "spot" and to simultaneously clamp the sheets together. Forcing a large current through the spot will melt the metal and form the weld. The attractive feature of spot welding is a lot of energy can be delivered to the spot in a very short time (approximately ten milliseconds). That permits the welding to occur without excessive heating to the rest of the sheet.
「spotwelding」は動詞「spotweld」の現在分詞です