Position welding device for fuel oil radiator installation seat

Abstract

The invention discloses a positioning welding device for installation seats of a fuel and lubricating oil radiator. The positioning welding device comprises a bottom plate and a positioning block on the upper end face of the bottom plate. The front end and the rear end of the positioning block are provided with small supporting plates correspondingly. The left side and the right side of the positioning block are provided with a large supporting plate and a medium supporting plate correspondingly. The upper ends of the small supporting plates are rotationally connected with a rotation plate, and the tail end of the rotation plate is connected with a first compression screw and a pressing block. The upper end of the large supporting plate and the upper end of the medium supporting plate are rotationally connected with Z-shaped plates, the tail ends of the Z-shaped plates are connected with second compression screws, third compression screws are connected to the large supporting plate and the medium supporting plate, and a positioning core shaft is arranged on the large supporting plate. According to the positioning welding device, the requirements for the true position between the installation seats on a shell of the radiator and a barrel body, the true position between the installation seats, the perpendicularity between the installation seats and an installation plane and the planeness of the installation plane are met.

Description

technical field [0001] The invention relates to a radiator in an aero-engine lubricating oil system, in particular to a positioning and welding device for an auxiliary fuel-lubricating oil radiator mounting seat of an aero-engine and a use method thereof. Background technique [0002] The fuel oil radiator is an aero-engine lubricating oil cooling accessory, which mainly uses fuel as a cooling medium to cool the high-temperature hot lubricating oil that flows back through the engine. The fuel oil radiator is mainly composed of a heat dissipation core, a cylinder body, a mounting seat, fuel oil inlet and outlet nozzles, and lubricating oil inlet and outlet nozzles. The requirements for the position degree between the mounting seat holes of the fuel oil radiator and the positional degree requirements of each nozzle for the mounting seat holes are both 0.2. In order to ensure the product requirements, in the manufacturing process, the mounting seat (unprocessed mounting hole) ...

AI Technical Summary

Problems solved by technology

[0006] 1. The line is drawn on the outer surface of the cylinder, and it is not clear to see when it is lightly drawn, and the heavy line will affect the appearance quality of the product and reduce the strength of the product parts;

[0007] 2. Alignment, the consistency of each aligned position is poor, and it is common for the fluctuation range to reach 0.4-0.8mm, which exceeds the position requirement of 0.5mm;

[0008] 3. During positioning spot welding, the mounting seat is free on the cylinder body. After the positioning spot is placed, the position changes by 3-5 mm, which seriously affects the product quality;

[0009] 4. During welding, the welding deformation is larger, and the deformation of the welded parts reaches 5-8mm

Otherwise, it will not only affect the appearance quality of the product, but also the welded radiator shell cannot be corrected.

After welding, the position requirements of each mounting seat cannot be guaranteed. After machining, the wall thickness of the mounting seat hole is less than 2.7mm. On the plane, its mounting seat bears all the weight of the product and the force transmitted to the product from the outside during the working process, which is prone to breakage, which may lead to the failure of the test or the flight of the plane

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