Case: Copper Deep-dapped Cap for EV-charger Fittings
案例：充电桩配件铜质深盆端盖
标签：充电桩, 新能源五金, 深盆压窝, 逐级退火, 量产
某充电桩指示灯端盖（φ80 mm 深盆，1.5 mm T2 铜）采用凹模逐级压窝：四级钢模深度 10/22/34/45 mm，级间 650 ℃ 退火并酸洗；聚氨酯传力垫厚 8 mm，压力 12 MPa。边缘起皱靠每级留 5 mm 法兰、末级切边解决。最终打平修光并钝化封护，平面度≤0.3 mm，月产 2000 件稳定，验证了压窝工艺在新能源五金上的可行性。
An EV-charger indicator cap (φ80 mm deep cup, 1.5 mm T2 copper) was dapped in stages: four steel dies at 10/22/34/45 mm depth, annealing and pickling at 650 °C between stages, an 8 mm polyurethane force pad, 12 MPa pressure. Rim wrinkling was solved by leaving a 5 mm flange per stage and trimming last. Final planishing, passivation and sealing gave flatness ≤0.3 mm; output runs stable at 2 000 pcs/month, proving dapping viable for e-mobility hardware. ---