3D-printed Draw Beads & Die Inserts
3D 打印随形拉延筋与凹模镶块
标签：3D打印, 拉延筋, 镶块, 随形, SLM, 模具
SLM 打印马氏体时效钢（1.2709）随形镶块用于小批量铜壳试制模：打印后时效 490 °C×6 h 达 50 HRC，工作面喷丸+抛光即可。半圆形拉延筋（筋高 5 mm、R2）对黄铜壳进料阻力调节敏感，打印镶块改筋高只需重新打印 2 天。相比整体淬硬模（4–6 周交期），试制阶段综合成本低 50–70%。
SLM-printed maraging-steel (1.2709) conformal inserts suit low-volume copper shell tryout dies: age at 490 °C for 6 h to ~50 HRC, then shot-peen and polish working faces. Semicircular draw beads (5 mm high, R2) tune brass draw-in resistance precisely, and a revised bead height is reprinted in 2 days. Versus a fully hardened die (4–6 weeks lead time), tryout cost drops 50–70%. ---