Method for welding thin wall stainless steel tube and copper pipe piece

Abstract

The invention discloses a welding method of a thin-walled stainless steel tube and a copper tube part, which can lead the thin-walled stainless steel tube and the copper tube part to form a permanent fastening and sealing connecting structure at the connecting part. The welding method has simple process, the steps of the process thereof are that: (1) the connecting part of the thin-walled stainless steel tube and the copper tube part is cleaned, silver welding paste is coated at the connecting part of the thin-walled stainless steel tube and the copper tube part which is clean; (2) the connecting part of the thin-walled stainless steel tube is inserted in the connecting part of the copper tube part, the outer wall of the copper tube part is heated; (3) when the connecting part of the copper tube part and the thin-walled stainless steel tube is indirectly heated to the temperature range of 750 DEG C to 860 DEG C, a silver welding strip is arranged along the exposed position of the connecting part of the thin-walled stainless steel tube and the copper tube part, the silver welding strip is melted by utilizing the heat stored in the copper tube part, and the welding connection of the thin-walled stainless steel tube and the copper tube part can be completed after the cooling. The welding method can be widely applied in cold and hot water supply pipelines of various tap water supply pipelines and water heaters.

Description

technical field [0001] The invention relates to the technical field of welding thin-walled stainless steel pipes and copper, in particular to a welding method for thin-walled stainless steel pipes and copper pipe fittings. Background technique [0002] At present, in the tap water supply pipeline or the cold and hot water supply pipeline of the water heater, the sealing connection structure between the thin-wall stainless steel bellows and the copper pipe fittings is basically a nut fastening connection structure, that is, the thin-wall stainless steel The connection end of the bellows is punched through a special mold, and then a sealing rubber gasket is placed at the connection, and the nut that is movable on the bellows is screwed into the external thread of the connection part of the copper pipe and tightened to complete the thin-walled stainless steel bellows and copper. Sealed connection of pipe fittings. In most cases, these thin-walled stainless steel bellows and th...

AI Technical Summary

Problems solved by technology

These pipelines have been working for a long time, and the rubber gasket inside will be aged, deformed, damaged, the seal will be damaged, and water leakage will occur.

However, it is difficult to find where the water leakage occurs. Even if the water leakage is found by observing the water stains on the wall, it cannot be repaired and replaced locally.

The best way is to weld the thin-walled stainless steel bellows to the copper pipe fittings to achieve a permanent sealed connection, but so far, no such welding method has been found

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