The porthole cover forming technology has been analysed and theoretical calculation and simulation verification have been done hence scheme of forming technology and die design done.
分析了装货口盖成形工艺性，并进行了理论计算和模拟验证，由此制定了该工件的成形工艺、模具设计方案。
A few types of dies is analyzed. A new design of Solid porthole die, which simplify die manufacture and maintenance, is introduced.
分析了几种常用模具结构的优缺点。介绍了整体分流模的一种新设计方法，使模具加工和维修大简便。
The data of simulation are obtained, at last the optimization design of the porthole die are gained.
最终通过模拟获得的数据，对平面分流组合模进行了优化设计。
The data of simulation are obtained, at last the optimization design of the porthole die are gained.
最终通过模拟获得的数据，对平面分流组合模进行了优化设计。
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