Dapping Block & Punch Care
凹模组与半圆冲的维护
标签：凹模, 冲头, 保养, 防锈, 工具
钢制凹模组（dapping block）含多组同心半圆坑，配一整套递增直径的半圆冲。使用后以油布擦拭防锈，坑面勿磕碰以免留痕转印工件。冲头顶端保持光滑，定期上蜡减摩。存放时分组套好避免混丢。
A steel dapping block holds sets of concentric hemispherical cavities matched by a full range of incremental punches. Wipe with an oiled cloth after use to prevent rust, and never dent the cavities or the flaw transfers to work. Keep punch tips smooth, wax occasionally for low friction, and store punches grouped to avoid loss. ---