摘要
介绍了列管换热器壳程进出口反向曲线变径段的设计和制造程序,总结出在标准椭圆封头中心开孔的两个经验公式。利用标准椭圆封头胎具,采用二次冲压成形工艺,缩短了制造周期,大大降低了制造成本。
This paper introduces the procedure for design and manufacture of reverse-curved reducing inlet and outlet shell nozzles, brings out two experienced formula for hole opening at center of standard elliptical head. The manufacture time and cost can be sharply reduced by adopting two times punch shaping process with the aid of the mould of standard elliptical head.
出处
《中氮肥》
2008年第2期44-48,共5页
M-Sized Nitrogenous Fertilizer Progress
关键词
反向曲线
变径段
设计
制造
经验公式
二次冲压
reverse-curve
reducing nozzle
design
manufacture
experienced formula
two times punch
