Raising Basics: Centre-Out Hammer Sequence
起凸基础：由中心向外的锤击顺序
标签：起凸, 锤序, 窝砧, 退火, 旋转体
取直径合适的圆料置于窝砧弧面，锤击点从中部开始，每圈沿同心圆向外扩展约 5–10 mm，同时工件匀速旋转以保证均匀。每次锤击落点重叠 1/3，避免局部过薄。每升高一段即退火，保持金属塑性，防止开裂。
Place a suitably sized disc on the curved stake; start strikes at the centre and expand outward in concentric rings ~5–10 mm per pass while rotating the work evenly. Overlap each blow by 1/3 to avoid thin spots. Anneal after each height gain to keep the metal ductile and prevent cracking. ---