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A welding process for double-layer flange of muffle pipe

A technology of muffle tubes and muffle tubes, which is applied in the direction of manufacturing tools, welding equipment, arc welding equipment, etc., can solve the problems of lower product quality, unreachable flatness, and large deviation of parallelism between two flanges. Achieve the effect of ensuring shape and position tolerance requirements, improving precision requirements, and controlling welding deformation

Active Publication Date: 2014-10-08
WISDRI WUHAN WIS IND FURNACE
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

If the double-layer flange assembly or welding process is not handled properly, the flatness of the upper and lower flange installation surfaces cannot meet the design requirements or the parallelism deviation of the two flanges is large. The furnace atmosphere control and air tightness of the entire annealing furnace are affected; since the stainless steel strip passes through the muffle tube vertically, burners are evenly arranged on both sides of the muffle tube to heat the stainless steel strip, if the muffle tube body and the flange There is a large error in the verticality of the stainless steel strip, which will inevitably cause uneven heating on both sides of the stainless steel strip, thereby reducing the quality of the final bright annealing product

Method used

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  • A welding process for double-layer flange of muffle pipe
  • A welding process for double-layer flange of muffle pipe
  • A welding process for double-layer flange of muffle pipe

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] Such as Figures 1 to 5 As shown, the assembly and welding process of the double-layer flange of the muffle tube, the specific assembly and welding process is as follows:

[0031] A. Place the lower flange 2 after machining on the assembly platform 9. After drawing the center line of the flange, check the flatness of the lower flange 2 in 12 equal parts, mark the error of each equal part, and then according to the cooling half The assembly position of the pipe 4 and the rib plate 3 is set out and marked on the lower flange 2;

[0032] B. Predict the outer diameter of the assembly contact position between the muffle tube body 5 and each rib plate 3, compare the inner diameter of the flange 2, determine the radial installation position error of each rib plate 3, and then use the argon arc according to the marking position The cooling half-pipe 4 and 12...

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Abstract

The invention discloses an assembly welding process of a muffle pipe double-layer flange. The strict assembly welding process of an upper flange, a lower flange, a rib plate, a cooling semi-pipe and a muffle pipe tube body is adopted, the welding deformation control key point is fully considered, the form and location tolerance requirements between the muffle pipe and the flanges as well as between the flanges are ensured, the assembly error and the welding deformation of the muffle pipe double-layer flange structure are effectively controlled, the design requirement is reached, and the precision requirement of the muffle pipe is perfectly improved.

Description

technical field [0001] The invention relates to the technical field of assembly and welding of pipe flange structures, in particular to an assembly and welding process of a double-layer flange of a muffle pipe. Background technique [0002] In the vertical stainless steel bright annealing furnace, there is a muffle tube spliced ​​by multi-section cylindrical cylinders and a double-layer flange structure on the top. The muffle tube is suspended, connected to the cooling section of the annealing furnace through the upper flange, and fixed on the steel structure platform through the lower flange. If the double-layer flange assembly or welding process is not handled properly, the flatness of the upper and lower flange installation surfaces cannot meet the design requirements or the parallelism deviation of the two flanges is large. The furnace atmosphere control and air tightness of the entire annealing furnace are affected; since the stainless steel strip passes through the mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K33/00
Inventor 余正周瑞
Owner WISDRI WUHAN WIS IND FURNACE
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