大型曲面箱底旋压成形　工艺规范 Spinning process of large-curved tank bottom— Technological specification  ICS  25.020 CCS  J 32   中华人民共和国国家标准 GB/T 44920—2024 2024-11-2 8发布 2025-06-0 1实施     国家市场监督管理总局 国家标准化管理委员会 发 布 目　　次 前言   ·····································································································   Ⅲ 1     范围   ··································································································   1 2     规范性引用文件   ······················································································   1 3     术语和定义   ···························································································   1 4     设备要求   ······························································································   2 5     毛坯设计   ······························································································   2 6     工装设计   ······························································································   3 7     工艺过程   ······························································································   5 8     检验与记录   ···························································································   8 GB/T 44920—2024     Ⅰ