In hydrostatic forming, technological parameters have a significant influence on the thin shell product formation. One of the most important factors is the forming liquid pressure. This pressure exerts directly on the workpiece, pulling the workpiece closely to the die's profile. Therefore, this parameter should be kept large enough for shaping the product with the required shape and size. In practice, however, it is very difficult to achieve and maintain the high value of this parameter. In addition, it is also necessary to set up a mathematical model of this parameter to support the calculation and control. This paper has suggested a simple solution for maintaining fluid pressure during forming. The solution has been applied into the experimental system. Using this system to investigate forming liquid pressure parameter, the paper has given a suitable mathematical model when shaping cylindrical details from sheet metal. The results of the study contribute to data in die design, parameter calculation and control as well as forming process stabilization in hydrostatic forming for sheet metal.

在静水压成型中，工艺参数对薄壳产品的成型有重要影响。最重要的因素之一是成型液压力。该压力直接施加在工件上，将工件拉近模具的轮廓。因此，该参数应保持足够大，以使产品具有所需的形状和尺寸。然而，实际上，要实现并保持该参数的高值非常困难。另外，还需要建立该参数的数学模型以支持计算和控制。本文提出了一种在成型过程中保持流体压力的简单解决方案。该解决方案已应用于实验系统。使用该系统调查成型液压力参数，当用钣金成型圆柱状零件时，本文提供了合适的数学模型。研究结果为钣金静压成形中的模具设计，参数计算和控制以及成形过程的稳定性提供了数据。