In the fabrication of pressure vessels for petrochemical equipments,the key to quality control of stamping of head is the calculation of head blank expanding size and the stamping of the head.

• 在石油化工设备压力容器制造中,对于整体冲压成形封头的质量控制关键是封头展开下料毛坯直径展开计算和冲压成形环节。