Sealing method of aviation casting machine box cavity pressure test

Abstract

The invention relates to a sealing method and especially relates to a sealing method of an aviation casting machine box cavity pressure test. The method comprises the following steps that 1, an end of an adjusting bolt is made into a cylindrical shape, an O-shaped rubber sealing ring 1 is covered on the adjusting bolt, and then the O-shaped rubber sealing ring 1 and the adjusting bolt are put into a light hole; 2, a plug is provided with an inner hole and a blocking-pipe external diameter size of the plug is the same with an external diameter size of the adjusting bolt; a O-shaped rubber sealing ring 2 is covered on a blocking pipe, and the plug is inserted into an end portion of the light hole so that a screw of the adjusting bolt passes through the inner hole; 3. After a hexagon nut and the adjusting bolt are screwed, the hexagon nut is pressed on the plug, a moment is applied to the hexagon nut so that the O-shaped rubber sealing ring 1 and the O-shaped rubber sealing ring 2 carry out a sealing effect. The sealing method is flexible, simple and easy to operate and an effect of sealing a semi-closed cavity is reached.

Description

technical field [0001] The invention relates to a sealing method, in particular to a sealing method for a pressure test of an aviation casting casing cavity. Background technique [0002] The aviation casting casing is a casting structural part with annular holes and a semi-closed cavity. It is difficult to detect the internal defects of the semi-closed cavity non-destructively, and it is difficult to carry out a comprehensive and accurate inspection of the internal quality of the casting. Therefore, the design requires kerosene to test the sealing of its semi-closed inner cavity, and to detect the internal metallurgical quality of the casting. In order to meet the conditions of the kerosene pressure test, it is necessary to seal the multiple light holes that communicate with the semi-closed inner cavity of the part. The existing technology adopts the production of special tooling, and puts the plugs with sealing rubber rings of the same size as the light holes into each In...

AI Technical Summary

Problems solved by technology

This method has disadvantages since its use: because the aviation casting casing is a casting, the multiple light holes distributed on its circumference not only have their own aperture tolerance within 0.5mm, but also have an angular position tolerance within 1mm, so When the screw is tightly blocked, the effective area is reduced and the force is not on the center of the plug. During the pressing process, kerosene will leak from multiple light holes to varying degrees, and the blockage with the sealing rubber ring cannot fully seal the semi-closed inner cavity. Sealing requires the operator to constantly adjust the position of the screw on the annular iron plate, and the parts must be assembled repeatedly to meet the sealing requirements.

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