Hydraulic Bladder-assisted Repoussé
液压枕式辅助浮雕（囊袋成形）
标签：液压枕, 囊袋成形, 大幅浮雕, 底坯, 省时
大幅面浮雕可借液压枕顶出基础形：铜板背衬橡胶囊，充压 3–8 MPa 使板料整体鼓起 5–15 mm 深度，形成浮雕底坯；细节仍由手工錾刻完成。相比纯手工，液压顶出壁厚均匀、省去 3–4 轮退火，制作周期缩短约一半。注意四周留 30–50 mm 夹持余量，压后先校平法兰再上胶盘做细部。
Large panels can be rough-raised on a hydraulic bladder: with a rubber bladder behind the sheet, 3–8 MPa balloons the metal 5–15 mm deep to form the repoussé blank; detail is still chased by hand. The even wall thickness saves 3–4 annealing rounds and roughly halves the schedule. Keep a 30–50 mm clamping margin, flatten the flange after pressing, then pitch the work on the chasing bowl for detail. ---