A thermal deformation control device for a multi-degree-of-freedom space structure

Abstract

The invention discloses a thermal deformation control device of a multiple-degree-of-freedom spatial structure in a brazing high-temperature environment. The thermal deformation control device comprises a base, locating blocks, locating forcing screws, connecting screws and an auxiliary profiling press block. Peripheral equipment comprises a guide device to be welded and a startup spraying pipe tobe welded. The guide device is fixed to the base after angular locating is conducted on the guide device. The locating blocks are fixedly connected to the base through the connecting screws. The locating forcing screws pass through threaded through holes formed in the locating blocks, point to the direction of thermal deformation of the startup spraying pipe and tightly press the auxiliary profiling press block on the surface of the startup spraying pipe. The pressing force is applied in the normal directions of the excircle surfaces, close to matched portions, of two branch-shaped pipe portions of a workpiece through the locating forcing screws and the auxiliary profiling press block, and therefore the purpose of controlling thermal deformation is achieved. By the adoption of the thermaldeformation control device of the multiple-degree-of-freedom spatial structure, the phenomenon that due to thermal deformation, the gap of a brazing seam is enlarged in the high-temperature environment is avoided, then the phenomenon that the incomplete-penetration defect exists is avoided, and the brazing quality is substantially improved.

Description

technical field [0001] The invention relates to a thermal deformation control device for a multi-degree-of-freedom space structure in a brazing high-temperature environment, and belongs to the technical field of structural thermal deformation control. Background technique [0002] Due to the complex structure of some parts in the core machine of aerospace engines, the overall molding process is extremely difficult, so the design structure of the components formed separately and combined by brazing is often used. Typical product structure such as figure 1 shown. This product is composed of a guide 1 and a starting nozzle 4. The guide is a rotary part, and the starting nozzle is a branch-shaped three-dimensional space structure. The two parts pass through three arc-shaped surfaces on the starting nozzle. Cooperate with the two outer circles of the guide and connect by brazing. [0003] Since the starting nozzle is a multi-degree-of-freedom space structure, and there are man...

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Problems solved by technology

[0003] Since the starting nozzle is a multi-degree-of-freedom space structure, and there are many matching parts, it is difficult to control the deformation in the brazing high-temperature environment, resulting in large deformation during the brazing process, which makes the gap between the welding seams of the matching parts too large, which cannot meet the requirements. Process index requirements, which in turn lead to brazing quality problems, and become the technical key and bottleneck of product manufacturing

[0004] When brazing such products in the industry, there is often no effective means to control the thermal deformation in the brazing high-temperature environment, which leads to frequent brazing quality and repeated rework and rework, which not only seriously reduces the manufacturing efficiency, but also greatly increases the manufacturing cost. Cost, but also bring quality hidden dangers, and then become the bottleneck short-term of engine manufacturing technology

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