Welding seam airtightness detection device

Abstract

The invention belongs to the technical field of welding technique and specially relates to a welding seam airtightness detection device. According to the detection device, an air inlet pipe nozzle is welded with a cover plate; inclined screw holes in the cover plate are in one-to-one correspondence with inclined screw holes in a lower housing; the upper ends of compression screws are cooperated with the inclined screw holes in the cover plate respectively; the lower ends of the compression screws are cooperated with the inner diameters of the inclined screw holes in the lower housing respectively; the cover plate is provided with a seal groove which is equipped with a cover-plate-place seal ring; and the compression screws are sleeved with screw-place seal rings respectively. The seal rings are blocked at the two sides of an inclined screw bush and diagonally arranged above the inclined screw bush, so that an airtight space is formed between the inclined screw bush and the detection device; the detection device and the lower housing are clamped together by utilizing the compression screws, so that during charging, air is filled at the welding seam detection places by utilizing the screw gaps between the inclined screw bush and the compression screws; and through the method above, the requirement of welding seam airtightness detection of a product 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] Such as 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. Such as 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 in each gap. Therefore, in production, it is necessary to carry out an airtight test on the welding part of the oblique screw cap...

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, and the strength of the bow clamp cannot be controlled during the production process, the inner side of the small end of the shell is often injured by the bow clamp

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