Lift tube leakage testing detecting method and device

Abstract

The invention provides a lift tube leakage testing detecting method and device. The lift tube leakage testing detecting method comprises the following steps: acquiring a lift tube leakage testing detecting starting signal; when the situation that a lift tube is mounted on a furnace body and the liquid surface height in the furnace body is greater than a designated position is determined, adjustinga casting machine to the simulation production state, adopting a furnace pressure control valve to control compressed air to be fed in the furnace body, and enabling the interior of the furnace bodyto pressurize and maintain pressure according to the preset pressurizing phase; and during the pressurizing and pressure maintaining process, determining that whether the lift tube leaks or not according to the state of liquid in the lift tube. According to the technical scheme, the phenomena that a die has logout and production is terminated caused by leakage of the lift tube are reduced, the manpower, the material resources and the production time are saved, the leakage problem of the lift tube can be solved in a preventive manner, the downtime is shortened, automatic detection can be realized, detection is precise, the effect is excellent, the operation is simple and the security coefficient is higher.

Description

Technical field [0001] The invention relates to the technical field of casting, in particular to a riser tube leak test method and a riser tube leak test device. Background technique [0002] Low pressure casting is a method in which liquid metal fills the cavity from bottom to top along the riser tube under the action of dry air pressure to form a casting. Because the pressure used in the entire casting process is relatively low, it is called low pressure casting. [0003] In low-pressure casting, the stability and accuracy of pressure are the most important factors in low-pressure technology, which will have a significant impact on production management and product quality. The actual pressure caused by the pressure leakage is lower than the pressure required by the process, which is also the most important factor affecting the stability and accuracy of the pressure. [0004] Air leakage in the riser pipe is one of the causes of pressure leakage. However, the existing judgment o...

AI Technical Summary

Problems solved by technology

However, the judgment of the air leakage at the existing riser pipe can only be guessed by the defect form of the product, and the misjudgment rate is very high, which will also cause serious impact on production. Artificially judge whether the riser pipe is Leakage, the risk of misjudgment is very high. In addition, once the riser leaks, the mold will be unloaded and the production will be terminated, and it cannot be prevented in advance.

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