薄底

一种薄底液氮低温容器

A Liquid Nitrogen Vessel with Thin Wall

弹壳类零件具有壁薄、底厚的结构特点，为了提高其组织致密度和机械性能，宜采用冷挤压工艺生产该类零件。

Cartridge case is a kind of part with thin wall and thick bottom . It 's a preferred forming process as cold extrusion in order to improve both compactness in structure and mechanical property for this kind of part .

随着DI材厚度的减薄，拱底耐压性能会下降，因此，需要分析罐底形状对拱底耐压性能的影响，以便于对罐底形状进行设计，提高两片罐的抗拱底翻转能力。

As the dome reverse pressure will decrease with the thickness of DI tinplate reduction , it is necessary to analyze the influence of the base section on the dome reverse pressure of two piece can so as to improve it by new base design .

孤岛式薄顶软底工作面推垮型冒顶分析

The analysis of pushing prop over in insular coal face with thin roof and soft floor

深冲过程中，法兰区周向受压而增厚，凹模圆角处减薄，杯壁减薄，杯底厚度基本不变；

The thickness at the flange increases and almost unchanges at the bottom of cup while near the concave corner of the die decreases during deep drawing .