翻訳と辞書 Words near each other ・ Power gating ・ Power geometry ・ Power Geyser ・ Power Girl ・ PoweR Girls ・ Power Glen Shale ・ Power Glen, Ontario ・ Power Glove ・ Power Glove (band) ・ Power Golf ・ Power good signal ・ Power graph analysis ・ Power Grid ・ Power Grid Company of Bangladesh ・ Power Grid Corporation of India ・ Power hammer ・ Power harassment ・ Power Henry Le Poer Trench ・ Power history ・ Power Hit Radio ・ Power Hit Radio (Estonia) ・ Power Hit Radio (Lithuania) ・ Power hitter ・ Power hockey ・ Power Holding Company of Nigeria ・ Power Home Remodeling Group ・ Power hour ・ Power House (Alcatraz) ・ Power House (talkshow) ・ Power House Covered Bridge 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 Power hammer ： ウィキペディア英語版 Power hammer Power hammers are mechanical forging hammers that use a non-muscular power source to raise the hammer preparatory to striking, and accelerate it onto the work being hammered. Also called "Open Die Power Forging Hammers." They have been used by blacksmiths, bladesmiths, metalworkers, and manufacturers since the late 1880s, having replaced trip hammers. ==Design and operation== A typical power hammer consists of a frame, an anvil, and a reciprocating ram holding a hammer head or die. The workpiece is placed on the lower anvil or die and the head or upper die strikes the workpiece. The power hammer is a direct descendant of the trip hammer, differing in that the power hammer stores potential energy in an arrangement of mechanical linkages and springs, in compressed air, or steam, and by the fact that it accelerates the ram on the downward stroke. This provides more force than simply allowing the weight to fall. Earlier designs like trip hammer, steam drop hammers, board or strap hammers, use the power source to raise the ram, but let its fall be propelled solely by gravity. Power hammers are rated by weight of moving parts that act directly on the work piece. This includes the weight of the parts that may consist of upper die, ram, mechanical linkage arms and spring(s) or ram, piston, and associated connecting rod(s). Specific design elements are dictated by the power source. The largest power hammer was powered by steam and was rated at . 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「Power hammer」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.