Local dry-type underwater friction stitch welding device

Abstract

The invention provides a local dry-type underwater friction stitch welding device. The device mainly consists of a sealing gasket (2), a cover body (3), a stopper adapter component (4), a hydraulic cylinder body (5), a transmission shaft (6), a support bearing (7), a hydraulic cylinder piston (8) and a hydraulic motor (9), wherein the stopper and a workpiece are in friction to produce heat in the friction stitch welding process, as heat convection is existeds in the environment with water, a large amount of the heat produced by the friction is lost; and the existing of water causes quenching for the workpiece, so as to greatly affect the welding process; . according According to the device provided by the invention, the novel cover body and the sealing gasket are arranged on a welding spindle head, the water is discharged through the high pressure gas during welding to form a local dry-type space, and then the welding is carried out. The device provided by the invention is simple in structure, convenient in use, reliable in performance, economical and practicable, and can be used for realizing underwater friction stitch welding.

Description

technical field [0001] The invention relates to the field of welding equipment, in particular to a partially dry underwater friction stitch welding device. Background technique [0002] At present, there are many kinds of underwater welding methods being applied and researched in various countries in the world. The more mature one is arc welding, and the commonly used ones are underwater wet welding, underwater partial dry welding and underwater dry welding. The underwater wet welding equipment is simple, low in cost, flexible in operation and strong in adaptability, but the welding quality is unsatisfactory; the welding quality of the underwater dry welding is relatively ideal, but it needs to design and manufacture complex pressure chambers or working rooms, equipment Complicated and expensive. In addition, the above welding methods are difficult to achieve welding repair of deep-water structures. As a solid-phase connection technology, friction stitch welding is less aff...

AI Technical Summary

Problems solved by technology

The underwater wet welding equipment is simple, low in cost, flexible in operation and strong in adaptability, but the welding quality is unsatisfactory; the welding quality of the underwater dry welding is relatively ideal, but it needs to design and manufacture complex pressure chambers or working rooms, equipment complex and expensive

In addition, the above welding methods are difficult to achieve welding repair of deep-water structures. As a solid-phase connection technology, friction stitch welding is less affected by water depth and environmental pressure, so it can realize welding repair of deep-water structures. Related technologies It is of great significance to the development of underwater engineering

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