Method for controlling depressurization of warm isostatic press

Abstract

The invention discloses a method for controlling depressurization of a warm isostatic press. The method includes: (1) setting working pressure, wherein the working pressure includes working pressure when depressurization is realized in a fuzzy control manner and working pressuer when depressurization is realized in the continuous adjustment manner; (2) collecting real-time pressure of the warm isostatic press during working; (3) comparing the collected real-time pressure with the preset working pressure, depressurizing in the fuzzy control manner when the real-time pressure is the working pressure when depressurization is realized in the fuzzy control manner, and depressurizing in the continuous adjustment manner when the real-time pressure is the working pressure when depressurization is realized in the continuous adjustment manner. The method is simple in steps and convenient to operate, and the warm isostatic press is depressurized by means of combining the depressurization in the fuzzy control manner and the depressurization in the continuous adjustment manner, so that depressurization process of the warm isostatic press can meet requirements on production precision of products, and the warm isostatic press is suitable for popularization and use.

Description

technical field [0001] The invention relates to a method for controlling pressure relief, in particular to a method for controlling pressure relief of a warm isostatic press. Background technique [0002] The pressure relief of the warm isostatic press refers to the process of slowly releasing the medium oil in the working cylinder of the warm isostatic press, and the pressure in the working cylinder has reached the process of slowly releasing the pressure according to the process curve. Pressure relief is the most critical step in the whole process. Although the powder material has been pressed and formed after the pressure holding process, the internal stress between the powders cannot be eliminated quickly. If the pressure in the working cylinder drops too quickly, the pressed product will Cracks or even ruptures occur, so a slow and controlled depressurization is necessary. [0003] Since the maximum pressure used by the warm isostatic press is 200MPa, the conventional ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome that the currently used proportional pressure relief valve cannot work in the ultra-high pressure environment when the warm isostatic press is working, and the conventional PID control method can only realize the continuous control function, so the existing The defect that the pressure relief method cannot meet the pressure relief requirements of the warm isostatic press provides a control method that is not only simple in steps, but also easy to operate, and can also meet the pressure relief requirements of the warm isostatic press. Methods