Positioning tool for detecting welding seam defects of air inlet casing and judgment method

Abstract

The invention relates to a positioning tool for detecting welding seam defects of an air inlet casing and a judgment method. The positioning tool comprises a fan-shaped supporting plate and a supporting plate sheet, wherein one side of the fan-shaped supporting plate is arc-shaped and is tightly attached to the inner arc of the inner ring of the air inlet casing, the supporting plate sheet is fixed on the fan-shaped supporting plate through a pin, the lower bottom edge of the supporting bottom sheet is a straight edge and coincides with the symmetric center of the arc-shaped edge, two U-shaped grooves are formed in the lower bottom edge side of the supporting plate sheet in parallel, the center line of the U-shaped groove close to the fan-shaped supporting plate coincides with the inner ring welding seam, the other U-shaped groove is away from the fan-shaped supporting plate and 10-30 mm away from the other U-shaped groove, cross laser devices are arranged in the U-shaped grooves, the cross light spot horizontal lines of the cross laser devices in the two U-shaped grooves coincide, and a power supply, a switch and a power amplifier are fixed on the supporting plate sheet, and the cross laser devices and the power amplifier are electrically connected with the power supply and the switch through conducting wires. According to the invention, on the premise of ensuring that the detection result is reliable and the detection efficiency is not reduced, accurate positioning of defects is realized.

Description

technical field [0001] The invention belongs to the technical field of weld defect detection, and in particular relates to a positioning tool and a determination method for detecting weld defects of an intake casing. Background technique [0002] The intake casing is an important part of the front end of the engine. The intake casing adopts the layout of the inner and outer rings, which are welded by the inner and outer rings and more than ten support plates. The plate and the protruding leaf-shaped part of the inner ring are connected by welding, because the support plate is a cavity structure, and the inner cavity of the support plate has two sizes (the support plate with a large inner cavity is a wide support plate, and the inner cavity is small) The support plate is a narrow support plate), so the gap between the two support plates is not equal, about 45mm-65mm. The cross-section of the strut is a sharp isosceles triangle, the two waists of the triangle are slightly con...

AI Technical Summary

Problems solved by technology

At present, film ray inspection is generally used for weld defect detection, but due to the narrow inner cavity of the support plate and the small distance between the welds on both sides of the support plate, it is difficult to determine where the incomplete penetration and air hole defects in the weld appear in the specific support plate. on one side weld

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