Fixture for brazing of fuel manifold

Abstract

The invention discloses a fixture for brazing of a fuel manifold. The fixture comprises a circular base (1); observation ports (2) are formed in the external circumference of the circular base (1) ina uniformly-spaced manner; a plurality of pressing units distributed in a uniformly-spaced manner are arranged on the upper end face of the circular base (1); the pressing units comprise pressing blocks (5) in threaded connection with studs (6), and supporting seats (3) below the pressing blocks (5); the studs (6) are perpendicular to the upper end face of the circular base (1); and lock nuts (7)are arranged on the pressing blocks (5) and are arranged at the tail ends of the studs (6). The problem that the end face of a spout is irregularly inclined after the brazing is solved, so that the design requirement that the planeness is less than or equal to 0.3 mm is met, the subsequent correction difficulty is lowered, the correction labor-hour is shortened, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of brazing, and in particular relates to a fixture for controlling the deformation of a fuel oil main pipe after brazing. Background technique [0002] The fuel main pipe is an important part of the engine, and the fuel required for the engine to work must be transported through the main pipe, so the assembly welding process of parts is particularly important. The parts need to connect the 24 nozzles with the fuel pipe through brazing. The brazed parts ensure the technical issues such as fuel flow, fuel distribution uniformity and spray quality. There are a total of 96 welding seams in the welding of the components of the fuel manifold; after welding, there are size control requirements such as position and nozzle flatness, and it is difficult to guarantee the size during the brazing process. [0003] Structural analysis is carried out for the parts. The main pipe parts are composed of 24 nozzles with gas h...

AI Technical Summary

Problems solved by technology

[0004] Vacuum brazing is done at high temperature (1050°C ~ 1065°C). The material itself has thermal expansion at high temperature, and the parts cannot be effectively positioned at high temperature, so the flatness of the parts after welding is almost impossible to guarantee.

[0005] In summary, the flatness of the end face of the nozzle after welding cannot meet the design requirements. Therefore, a fixture must be designed, which can not only facilitate on-site operation and size control, but also ensure the quality of the weld seam of the parts, the size of the components, etc.

Images