A special long shaft and shaft end flange welding auxiliary device and welding method

Abstract

The invention discloses an ultra-long shaft and shaft end flange welding assisting device and a welding method. The welding assisting device and the welding method can effectively assist welding between an ultra-long shaft and a shaft end flange, avoid uneven welding, effectively lower the welding difficulty, improve the welding efficiency and ensure welding quality. The device comprises a rack, a buried sleeve and a driven chain wheel. The rack is provided with a main bearing. The outer ring of the main bearing is fixed to the rack. The buried sleeve is vertical, and the upper end of the buried sleeve is provided with an opening. The opening in the upper end of the buried sleeve faces the main bearing. The rack is further provided with a variable-frequency and variable-speed motor and a speed reducer connected with the variable-frequency and variable-speed motor. The output end of the speed reducer is connected with a driving force chain wheel which is used as a power source of the driven chain wheel. The ultra-long shaft and shaft end flange welding assisting device has the advantages that welding between the ultra-long shaft and the shaft end flange can be effectively assisted, the welding efficiency is high, the welding process is stable, the overall welding difficulty is lowered, the welding process stability is good, and the welding quality is ensured.

Description

technical field [0001] The invention belongs to the technical field of extra-long shaft welding, and in particular relates to an auxiliary device for welding an extra-long shaft and a shaft end flange and a welding method. Background technique [0002] In many large-scale mixing equipment, there will be an important part - the stainless steel stirring shaft. Generally speaking, the length of this type of stirring shaft is more than four meters, and the length is even eight or nine meters, so it is often called in the industry. "Extra Long Axis". The shaft end of the extra-long shaft needs to be welded to the connecting flange. The quality of the welding of the two is very high, and full penetration argon arc welding must be used. At present, in the welding of this type of stirring shaft, the welding is completed by placing the stirring shaft horizontally, opening a groove groove for welding, and finally welding vertically. However, in this type of welding, when the welding...

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Problems solved by technology

However, in this type of welding, when the welding material melts and flows downward under the action of gravity, it is difficult to meet the uniformity and compactness of the weld seam, and it is easy to waste welding materials. The position of the welding electrode needs to be constantly changed during the process, so accurate process control is required, and the welding efficiency is low

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