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.