翻訳と辞書 Words near each other ・ Roll 'n Rocker ・ Roll (Anne McCue album) ・ Roll (Emerson Drive album) ・ Roll (gymnastics) ・ Roll a D6 ・ Roll Along Iowa ・ Roll Along, Cowboy ・ Roll Away (album) ・ Roll Away the Stone ・ Roll Away the Stone (album) ・ Roll Away Your Stone ・ Roll Back ・ Roll Back Malaria Partnership ・ Roll bar ・ Roll baronets ・ Roll bender ・ Roll bonding ・ Roll Bounce ・ Roll cage ・ Roll Call ・ Roll call ・ Roll call (disambiguation) ・ Roll Call (Hank Mobley album) ・ Roll Call (IQ album) ・ Roll center ・ Roll Deep ・ Roll Deep discography ・ Roll film ・ Roll Flight ・ Roll Flight MR V Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Roll bender ： ウィキペディア英語版 Roll bender A Roll bender is a mechanical jig having three rollers used to form a metal bar into a circular arc. The rollers freely rotate about three parallel axes, which are arranged with uniform horizontal spacing. Two outer rollers, usually immobile, cradle the bottom of the material while the inner roller, whose position is adjustable, presses on the topside of the material. Roll bending may be done to both sheet metal and bars of metal. If a bar is used, it is assumed to have a uniform cross-section, but not necessarily rectangular, as long as there are no overhanging contours, i.e. positive draft. Such bars are often formed by extrusion. The material to be shaped is suspended between the rollers. The end rollers support the bottomside of the bar and have a matching contour (inverse shape) to it in order to maintain the cross-sectional shape. Likewise, the middle roller is forced against the topside of the bar and has a matching contour to it. == Operation == After the bar is initially inserted into the jig, the middle roller is manually lowered and forced against the bar with a screw arrangement. This causes the bar to undergo both plastic and elastic deformation. The portion of the bar between the rollers will take on the shape of a cubic polynomial, which approximates a circular arc. The rollers are then rotated moving the bar along with them. For each new position, the portion of the bar between the rollers takes on the shape of a cubic modified by the end conditions imposed by the adjacent sections of the bar. When either end of the bar is reached, the force applied to the center roller is incrementally increased, the roller rotation is reversed and as the rolling process proceeds, the bar shape becomes a better approximation to a circular arc, gradually, for the number of passes required to bring the arc of the bar to the desired radius. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Roll bender」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.