EV Busbar & Terminal Stamping at Volume
新能源母排与连接件冲压量产
标签：母排, 新能源, 级进模, 接触电阻, 量产
软态 T2 铜母排（3×30 mm 级）级进模量产：工序排布冲孔 → 压花麻点（控制接触电阻）→ 折弯 → 切断，450 t 压机配伺服送料，送料精度 ±0.1 mm。关键验收：毛刺 ≤0.05 mm（高压回路防尖端放电）、压麻点后接触电阻 <50 μΩ、镀锡 5 μm 防氧化。量产节奏每模次 60 件/分，模具 Cr12MoV 渗氮 + 硬质合金冲针，刃磨周期 20 万冲次。新能源车型迭代快，级进模改版周期被压缩到 3 周，倒逼模具厂模块化工位设计。
Volume busbar production in soft T2 copper (3×30 mm class) runs a progressive die: pierce → coin knurl pads (contact-resistance control) → form → cut off, on a 450 t press with servo feed at ±0.1 mm. Acceptance keys: burr ≤0.05 mm (high-voltage tip-discharge), coined pad contact resistance <50 μΩ, 5 μm tin plating against oxidation. At 60 parts/min, nitrided Cr12MoV with carbide punches grinds every 200k strokes. Fast EV model cycles squeeze die revisions to 3 weeks, forcing modular-station die design.