大型焊接容器局部热处理防畸变工装优化设计

Optimization design of anti-distortion tooling for local heat treatment of large welded vessels

采用有限元方法对大型压力容器局部热处理畸变进行模拟,基于热处理最大畸变量,初步设计了工装的最佳尺寸,分析了不同直径和壁厚对筒体局部热处理畸变量的影响,得到了适用于不同筒体尺寸的最佳防畸变工装数量。结果表明,支撑台宽度0.2 m、支撑柱直径?4 cm为最佳的防畸变工装尺寸。筒体的直径越大,热处理畸变量也越大;筒体壁厚越厚,热处理畸变量越小;防畸变工装数量越多,热处理畸变量越小。

Local heat treatment distortion of large pressure vessel was simulated by finite element method.Based on the maximum distortion of heat treatment,the optimal size of anti-distortion tooling was preliminarily designed.The influence of different diameters and wall thicknesses on local heat treatment distortion of cylinder was analyzed,and the optimal number of anti-distortion tooling suitable for different cylinder sizes was obtained.The results show that 0.2 m of supporting platform width and?4 cm of support column diameter are the best anti-distortion tooling dimensions.The larger cylinder diameter is,the larger heat treatment distortion is.The thicker cylinder wall is,the smaller heat treatment distortion is.The more the number of anti-distortion tooling,the smaller heat treatment distortion.