Bending & Twisting

弯曲与扭转成形

type:tutorial · level:intermediate · material:brass · material:copper · scale:decorative-object · scale:jewellery · equipment:hand-tools · stage:patternmaking

标签：弯曲, 扭转, 成形

弯曲需沿预定折线局部加热（或整体热态），用钳固定缓慢施力，避免外侧拉裂、内侧起皱。扭转用于制作麻花、装饰纹：将杆件两端夹固，在热态下匀速旋转，注意端部定位防止滑脱。铜合金弯曲半径应大于料厚 1–2 倍，过锐易裂。

Bend by locally heating (or working hot) along the line, clamp and apply slow force — avoid outside cracking or inside wrinkling. Twisting makes rope/decoration: secure both ends, rotate steadily while hot, watch end fixation. Bend radius should exceed 1–2× thickness; sharper cracks. ---