Lewton-Brain and the Codification of Fold Forming
Lewton-Brain 与折叠成型体系的确立
标签：Lewton-Brain, 技法体系, 金工史, 折轴, 开源教学
折叠成型作为命名体系由查尔斯·柳顿-布雷恩（Charles Lewton-Brain）于 1980 年代归纳，1990 年代经其专著与 Brain Press 出版传播：把折轴约束原理整理成线折、楔折、星折等十余类可复现动作，并坚持不申请专利、公开教学。这一开源策略使该技法三十年内成为全球金工课程的标配单元。
Fold forming was codified by Charles Lewton-Brain in the 1980s and spread through his 1990s books and Brain Press: the fold-axis constraint distilled into a dozen repeatable families—line, wedge, star folds and more—taught openly with no patents. That open-source strategy made the method a standard module in metalwork curricula worldwide within thirty years. ---