Weld joint real-time protection cover during welding

Abstract

The invention discloses a weld joint real-time protection cover during welding. The weld joint real-time protection cover comprises a protection cover outer shell, a smoke-dust baffle, a metal net, fire-prevention fibers and a support which is used for fixing the metal net and clamping the fire-prevention fibers. The protection cover outer shell is a rectangular box body provided with an opening at the bottom. The front end of the protection cover outer shell is provided with a bevel. The smoke-dust baffle is buckled on the front bevel of the protection cover outer shell. The top of the protection cover outer shell is provided with a first gas inlet pipe and a second gas inlet pipe. The first gas inlet pipe makes the second gas inlet pipe be close to the first gas inlet pipe. The support is installed in the protection cover outer shell. The fire-prevention fibers are clamped between the protection cover outer shell and the support. The upper portion of the support is provided with a folded sheet used for supporting the metal net. During wielding, the weld joint real-time protection cover synchronously moves along with a welding gun to cover a high-temperature weld joint after welding of the welding gun, so that the weld joint emerging from the rear end of the protection cover is cooled to be below the temperature at which the weld joint is subjected to oxidation reaction with air, and accordingly the problem of smoke-dust pollution frequently generated when a high-temperature weld joint area is oxidized or welded in the automatic welding process is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of welding, and in particular relates to a real-time protective cover facing the welding seam during the automatic welding process. Background technique [0002] Welding technology is an important subject supporting the development of modern industry, and it is widely used in shipbuilding, automobile manufacturing, aerospace and other fields. All kinds of automatic welding and semi-automatic welding are developing rapidly, which greatly improves the welding efficiency. For the anti-oxidation coating of the weld, the usual welding torch structure and process are not enough to ensure the quality of the welded joint. Because the gas shield formed by this welding torch structure can only protect the welding pool from air pollution, but has no protective effect on the solidified and high-temperature weld and its heat-affected zone. Many metals in this state also have a strong ability to absorb nitrogen and oxyg...

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Problems solved by technology

[0003] The current automatic welding equipment protects the weld by filling the weld with argon, nitrogen or mixed gas from one end of the pipe. This method can only protect the molten pool from air pollution during welding. Under the conditions of speed and welding method (such as plasma welding or laser welding), there is no protection for the solidified and high-temperature weld and its heat-affected zone, and

Because the fume and dust during welding will also fall on the weld seam in a high temperature state, causing pollution to the weld seam, therefore, based on the above two problems, the traditional protection method must be improved to prevent the high temperature welding seam immediately behind the molten pool. Seams are oxidized and polluted

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