Welding method for welding vent pipe on oil filling pipe

Abstract

The invention discloses a welding method for welding a vent pipe on an oil filling pipe, which comprises the following steps: selecting a metal welding ring to be sheathed on the periphery of the weld of the vent pipe; placing the oil filling pipe on a stand fixture of a high-frequency welding machine; arranging the vent pipe into a connecting hole of the oil filling pipe, leading the connecting part of the vent pipe and the oil filling pipe to be vertical to the connecting hole; fixing the vent pipe, and leading the metal welding ring to be covered above the connecting hole; circling a high-frequency welding head of the high-frequency welding machine on the periphery of the vent pie and leading the high-frequency welding head to correspond to the welding part of the oil filling pipe and the vent pipe, and simultaneously positioning the metal welding ring at a heating part; starting the high-frequency welding machine, melting the metal welding ring and leading the molten metal welding ring to permeate into a weld seam till completely filling the weld seam; and taking out the oil filling pipe and the vent pipe and finishing welding. Compared with the prior art, the welding method has the advantages of simple operation, welding material conservation, smooth welding surface, high welding quality, good welding strength, better sealing property, low welding temperature, safety and the like.

Description

technical field [0001] The invention relates to a processing technology of a fuel filler pipe, in particular to a welding method for welding a vent pipe on a fuel filler pipe. Background technique [0002] At present, conventional argon arc welding or manual copper brazing is usually used to weld the vent pipe on the fuel filler pipe, but the above-mentioned welding methods have more or less the following defects: [0003] 1. Using conventional argon arc welding and manual copper brazing, the material and labor costs are high; [0004] 2. The operation requirements of argon arc welding are high, the welding surface is not smooth, and the operation of unskilled employees is easy to break down the pipe wall and cause gas leakage; [0005] 3. Manual copper brazing consumes a large amount of copper electrode material, and it is difficult to manually control the welding amount of copper bars, resulting in wasted loss, uneven welding surface, more pits and convex hulls, and also ...

AI Technical Summary

Problems solved by technology

[0003] 1. Using conventional argon arc welding and manual copper brazing, the material and labor costs are relatively high;

[0004] 2. The argon arc welding operation requires high requirements, the welding surface is not smooth, and unskilled employees can easily break through the pipe wall and cause air leakage;

[0005] 3. Manual copper brazing consumes a lot of copper welding rod material, and it is difficult to control the amount of copper rod welding manually, resulting in wastage and waste, the welding surface is not smooth, there are many pits and convex bumps, and it will also cause uneven brazing thickness, and There are welding defects such as welding pores, which also cause air leakage;

[0006] 4. The randomness of manual welding is large, it is difficult to control the welding quality, the welding parameters are unstable, and it is easy to cause brazing defects such as desoldering, virtual welding, and welding scars;

[0008] 6. Argon arc welding produces strong arc light, which affects the surrounding environment, especially causing damage to human eyes;

[0009] 7. Copper brazing is the mixed combustion of acetylene and oxygen to reach a high temperature, which produces a large amount of light and heat, which causes damage to the human body and eyes. At the same time, with the high temperature heat of combustion, improper use will cause explosions and other unsafe conditions.

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