Processing technology for longitudinal-seam narrow-gap welding groove of thick-walled barrels

Abstract

The invention discloses a processing technology for a longitudinal-seam narrow-gap welding groove of thick-walled barrels. The processing technology includes steps of 1), polishing a V-shaped shallow groove I functioning in temporarily fixing a welding seam outside a barrel section and a V-shaped shallow groove IV functioning in guiding a grinding wheel inside the barrel section; 2), filling the V-shaped shallow groove I by manual welding; 3), polishing and forming a narrow-gap U-shaped groove II by the aid of an automatic polishing machine; 4), filling the U-shaped groove II by automatic narrow-gap submerged-arc welding; 5), polishing and forming a narrow-gap U-shaped groove III by the aid of the automatic polishing machine; 6), filling the U-shaped groove III by the automatic narrow-gap submerged-arc welding. The processing technology for the longitudinal-seam narrow-gap welding groove is simple in technical process, groove angles are reduced, materials and labors are saved, and production efficiency is improved; misalignment of a root of the a groove resulted from dimensional errors during unilateral independent processing is avoided; since narrow-gap welding processing is creatively applied to longitudinal seams of the barrels, superior welding quality is obtained.

Description

technical field [0001] The invention relates to a groove processing technology, in particular to a groove processing technology for thick-wall cylinder longitudinal seam and narrow gap welding, and belongs to the technical field of groove processing. Background technique [0002] At present, the processing method of many large-diameter thick-walled container cylinders is: rolling from thick-walled plates, and then welding longitudinal seams to form them. When rolling a cylindrical cylinder with a plate, since a section at both ends of the plate cannot be rolled into shape, a certain amount of straight edge margin will be reserved at both ends when cutting the material; in addition, the traditional longitudinal seam bevel processing method Yes: When the roll is fast closed, use gas cutting to remove the margins at both ends of the straight edge, and then use an automatic grinding machine or manual grinding to polish the two ends to remove a certain amount of base material to ...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a thick-walled cylinder longitudinal seam narrow-gap welding groove processing technology for the shortcomings of thick-walled roll-welded containers, which cleverly utilizes the grinding wheel itself Shape, so that the grooves of the inner and outer walls can be automatically ground and shaped at one time, which solves the existing errors in the processing of the grooves, which may easily cause the wrong edge of the groove root, and the groove angle is large, and the demand for filling welding materials is large. Technical problems that require a large amount of labor can effectively solve the problems in the above-mentioned prior art

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