Limiting device for heat treatment of double-layer-structure welding assembly and clamping method

Abstract

The invention discloses a limiting device for heat treatment of a double-layer-structure welding assembly and a clamping method. The limiting device comprises an outer disc, an inner disc, a chassis,a centering shaft and a pressing plate, wherein the outer disc, the inner disc and the chassis are all disc parts with center holes and are assembled on the centering shaft; the peripheral surface ofthe outer disc is a first annular outer cylindrical surface; the first annular outer cylindrical surface is tightly attached to the inner surface of an outer layer structure of the double-layer-structure welding assembly; the peripheral surface of the inner disc is a second annular outer cylindrical surface; the second annular outer cylindrical surface is tightly attached to the outer surface of an inner layer structure of the double-layer-structure welding assembly; the pressing plate is connected with the upper end surface of the chassis through a first bolt; and an outer layer mounting edgeand an inner layer mounting edge of the double-layer-structure welding assembly are positioned between the pressing plate and the upper end surface of the chassis. The limiting device is adopted forclamping, so that the concentricity of the inner layer mounting edge and the outer layer mounting edge after heat treatment is guaranteed, the ovality of the inner layer mounting edge and the outer layer mounting edge is controlled, the concentricity of the inner layer mounting edge, the outer layer mounting edge and a large-end outlet section is guaranteed, the workload of calibration is reducedprior to turning, and the assembly requirements are met.

Description

technical field [0001] The invention belongs to the technical field of thermal processing, and relates to a limiting device and a clamping method for heat treatment of a double-layer structure welding assembly. Background technique [0002] Such as figure 1 As shown, in the assembly process of aero-engine components, welding of a double-layer structure assembly is involved. After welding and heat treatment, the inner and outer rings are deformed greatly, and the workload of post-machining correction is very large. During the processing, it is reflected that the part affects the processing progress. When turning the inner and outer mounting edges of the part, the deformation of the part will be large, the concentricity of the inner and outer mounting edges will be poor, the calibration workload will be large, and the turning process will cut into the main body of the part. Because there is no supporting special tooling for the heat treatment of the part, the welding stress h...

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Problems solved by technology

[0002] like figure 1 As shown, in the assembly process of aero-engine components, it involves the welding of a double-layer structure assembly. After welding and heat treatment, the deformation of the inner and outer rings is large, and the post-machining correction workload is very large. During the processing, it is reflected that the part affects the processing progress.

When turning the inner and outer mounting edges of the part, the deformation of the part will be large, the concentricity of the inner and outer mounting edges will be poor, the calibration workload will be large, and the turning process will cut into the main body of the part, etc.

Because there is no matching special tooling for the heat treatment of this part, the welding stress heat treatment is carried out in a free state, resulting in large deformation of the part after heat treatment, poor concentricity of the inner and outer layer mounting edges, and uneven gap at the exit of the big head, which increases the heavy calibration workload of subsequent turning processing

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