A Welding Process for Large Diameter Ring Parts

Abstract

The invention discloses a welding process of a large-diameter annular part. The welding process particularly comprises the following steps that (1) cleaning is carried out before welding; (2) primary positioning connection is carried out on the part to be welded through a manual padding argon arc welding tack-weld method; (3) the end, with a flange edge, of the part to be welded is fixed to a disk; (4) densification tack-welding is carried out on the connecting position of the part through vacuum electron beams; (5) sealing welding is carried out on the intervals of densification tack-welding in the step (4) through vacuum electron beams; (6) the part is taken out of a vacuum chamber, excess weld metal of a manual argon arc welding point is ground through a hand blower gun; (7) welding is carried out through vacuum electron beams. Through the welding process, the welding shrinkage amount of the part is largely reduced, the design and manufacturing expenses caused by a vacuum electron beam welding clamp in a traditional welding process are saved, and therefore the welding and machining cost is reduced. Meanwhile, the clamping work time of the part is saved, the labor intensity is relieved for a worker, and the production efficiency of the part is improved.

Description

technical field

[0001] The invention belongs to the technical field of welding processing, and relates to a large-diameter annular piece welding process. Background technique

[0002] Welding is a process and connection method that produces an interatomic bond between two workpieces through heating, pressure, or both. In the field of welding, metal welding is very common. The quality of the welding process is directly related to the quality of the welding, which affects the product qualification rate. Especially for the welding of large-diameter ring parts, it is particularly important. For example, when three large-diameter ring parts are subjected to vacuum electron beam positioning welding, the part butt joints are easily cracked to both sides due to the influence of tensile stress to both sides, resulting in gaps at the butt joints. If it is too large, welding cannot be carried out. In order to prevent the gap at the welding place from being too large, welding fixtures...

Examples

Embodiment Construction

[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings of the embodiments, but the scope of protection is not limited to the description.

[0024] Such as figure 1 As shown, part A1, part B2 and part C3 are large-diameter annular components, wherein part C3 has a flange edge 4, and the welding process of the present invention is used to weld part A1, part B2 and part C3 together, Its specific process steps are as follows:

[0025] (1) Cleaning before welding: Before welding, clean the welding grooves of parts A1, B2 and C3 to remove scale, rust or oil around the circular weld to ensure that there are no impurities around the groove of the weldment;

[0026] (2) Preliminary spot welding positioning and connecting parts: Use manual positioning spot welding with filler argon arc welding to perform preliminary positioning and connection of the parts to be welded; The strength of the butt joint is high; when...

technical field

[0001] The invention belongs to the technical field of welding processing, and relates to a large-diameter annular piece welding process. Background technique

[0002] Welding is a process and connection method that produces an interatomic bond between two workpieces through heating, pressure, or both. In the field of welding, metal welding is very common. The quality of the welding process is directly related to the quality of the welding, which affects the product qualification rate. Especially for the welding of large-diameter ring parts, it is particularly important. For example, when three large-diameter ring parts are subjected to vacuum electron beam positioning welding, the part butt joints are easily cracked to both sides due to the influence of tensile stress to both sides, resulting in gaps at the butt joints. If it is too large, welding cannot be carried out. In order to prevent the gap at the welding place from being too large, welding fixtures...

Examples

Embodiment Construction

[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings of the embodiments, but the scope of protection is not limited to the description.

[0024] Such as figure 1 As shown, part A1, part B2 and part C3 are large-diameter annular components, wherein part C3 has a flange edge 4, and the welding process of the present invention is used to weld part A1, part B2 and part C3 together, Its specific process steps are as follows:

[0025] (1) Cleaning before welding: Before welding, clean the welding grooves of parts A1, B2 and C3 to remove scale, rust or oil around the circular weld to ensure that there are no impurities around the groove of the weldment;

[0026] (2) Preliminary spot welding positioning and connecting parts: Use manual positioning spot welding with filler argon arc welding to perform preliminary positioning and connection of the parts to be welded; The strength of the butt joint is high; when...

Images