…The former is usually used to manufacture large items, while the latter is used to manufacture small precision items. Free forging includes stretching, which compresses the material to lengthen it (forging extension), upsetting, which compresses long materials in the longitudinal direction (upsetting), stretching, which expands them in the width direction, as well as hole enlarging and perforating. When compressing in the axial direction and expanding in the lateral direction, there are also upsetting, which deforms the entire material, and heading, which processes only a portion of it. … *Some of the terminology that refers to "upsetting" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…前者はふつう大型品,後者は小型の精密品の製造に利用されている。自由鍛造には材料を圧縮して長さを伸ばす伸ばし(鍛伸),長い材料を長軸方向に圧縮する据込み(アプセッティング),幅方向に拡大する展伸,ほかに穴広げ,せん孔などがある。軸方向に圧縮して横方向に広げる場合にも,全体を変形させる据込みと,一部分を加工するヘッディングheadingなどがある。… ※「アプセッティング」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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