A welding seam air tightness testing device

Abstract

The invention belongs to the technical field of welding, and in particular relates to a welding seam air tightness testing device. The inlet nozzle of the inspection device is welded together with the cover plate; the inclined screw holes on the cover plate correspond to the upward inclined screw holes of the lower housing; the upper ends of the pressing screws match the inclined screw holes on the cover plate , the lower end of the compression screw is matched with the inner diameter of the upper inclined screw hole of the lower housing; a sealing groove is opened on the cover plate, and a sealing ring at the cover plate is arranged in it; a sealing ring at the screw position is set on the compression screw . The present invention adopts sealing rings to block the two sides of the inclined screw bushing and the oblique upper side of the inclined screw bushing, forming an airtight space between the inclined screw bushing and the testing device, and clamping the testing device and the lower casing by means of compression screws Together, when inflated, the helical gap between the inclined screw bushing and the compression screw is used to make the airtight filling of the weld inspection place. In this way, the requirements of the product weld airtightness inspection can be conveniently and quickly met.

Description

technical field [0001] The invention belongs to the technical field of welding, and in particular relates to a welding seam air tightness testing device. Background technique [0002] like figure 1 As shown, the lower shell of a certain model is processed and formed by aluminum alloy castings, and the product is a structural form of a combination of a cylindrical section and a conical section. like figure 2 , image 3 As shown, at the small end of the product, the oblique screw cover is welded circumferentially to fix the oblique screw bushing. The product has high requirements on air tightness. During production, it is necessary to ensure that the cavity between the big and small ends is filled with air at 0.12 (upper difference +0.02, lower difference 0) MPa, and the pressure is maintained for 20 minutes, and no air leakage is allowed at each gap. Therefore, in production, it is necessary to carry out an airtight test on the welding part of the oblique screw cap at th...

AI Technical Summary

Problems solved by technology

[0004] (1) When using bow clamps to clamp the inspection device, considering that there is a cylindrical section at the small end of the lower shell, and the inner side of the small end is a slope structure, only eight 10-inch bow clamps can be used to clamp the workpiece. However, this kind of bow clamp is inconvenient to operate, and the clamping effect is not good. During the production process, air leakage between the inspection device and the lower casing often occurs;

[0005] (2) When the bow clamp is used to clamp the product and the inspection device, since the inner side of the small end is a slope structure, the strength of the bow clamp cannot be controlled during the production process, which often causes the inner side of the small end of the shell to be damaged by the bow clamp

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