Integral forming process of boiler header pipe seat

Abstract

The invention discloses an integral forming process of a boiler header pipe seat. The integral forming process comprises the following steps of A) drawing an inner diameter line of a pipe hole, an inner diameter line and an outer diameter line of the pipe seat and a pipe seat manufacturing range line on a barrel body; B) forming the pipe hole in the barrel body by machining according to the innerdiameter line; C) integrally manufacturing and forming the pipe seat on the barrel body by using a metal printing material in a 3D printing manner according to the inner diameter line, the outer diameter line and the manufacturing range line of the pipe seat, wherein the pipe seat comprises the pipe seat barrel body and a root reinforcing transition section; D) carrying out 100% nondestructive testing on the whole pipe seat; and E) carrying out heat treatment after the pipe seat is integrally formed. The integral forming process has the advantages that the early-stage preparation workload is small, the automation degree is high, the labor intensity is low, the machining efficiency is high, the operation environment can be improved, and the stability and the reliability of the product quality are improved.

Description

technical field [0001] The invention relates to a molding process of a boiler header pipe seat. Background technique [0002] The header is an important pressure-bearing part of the power plant boiler. There are many pipe sockets with a diameter of φ100mm~φ355.6mm and a wall thickness of 10~75mm arranged on the cylinder body, which are usually made of forgings or seamless steel pipes. , and then connected to the header shell by welding; such as figure 1 As shown, because the welding groove is a saddle-shaped groove, the saddle drop of the weld seam is large, the cross-sections of the shoulder weld 5 and the belly weld 6 are very different, the welding filling is extremely uneven, and the welding bead layout is difficult. Seam forming control requirements are high, and welding is very difficult. Therefore, "manual argon tungsten arc welding decoration, backing + manual arc welding filling and covering" or "manual argon tungsten arc welding decoration, backing + manual arc w...

AI Technical Summary

Problems solved by technology

[0002] The header is an important pressure-bearing part of the power plant boiler. There are many pipe sockets with a diameter of φ100mm~φ355.6mm and a wall thickness of 10~75mm arranged on the cylinder body, which are usually made of forgings or seamless steel pipes. , and then connected to the header shell by welding; such as figure 1 As shown, because the welding groove is a saddle-shaped groove, the saddle drop of the weld seam is large, the cross-sections of the shoulder weld 5 and the belly weld 6 are very different, the welding filling is extremely uneven, and the welding bead layout is difficult. Seam forming control requirements are high, and welding is very difficult

Therefore, "manual argon tungsten arc welding decoration, backing + manual arc welding filling and covering" or "manual argon tungsten arc welding decoration, backing + manual arc welding transition + gas shielded welding filling and covering" are usually used. Manual or semi-automatic welding operation methods not only require a lot of preparatory work, low degree of automation, high labor intensity, low efficiency and poor welding environment, but also the welding quality depends entirely on the welder's operation level and sense of responsibility, and the quality of the product Stability and reliability are difficult to guarantee

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