Pre-welding preheating and post-welding heat treatment device for tank body

Abstract

The invention provides a pre-welding preheating and post-welding heat treatment device for a tank body. The device comprises rollers, electric heating bands, calipers, a temperature controller, two positioners and hinges. The two electric heating bands are disposed around the tank body and distributed on both sides of a weld joint, and the calipers are arranged on both sides of the electrical heating bands. One ends of the calipers operatively clamp the sides of the electric heating bands, the other ends of the calipers are rotatably connected to the rollers, and the hinges are connected to the electric heating bands. The ends, away from the electric heating bands, of the hinges are fixed. The heating temperature of the electric heating bands is controlled through the temperature controller, pre-welding preheating, during-welding heat preservation and post-welding heat treatment of the tank body are achieved, and the tank body does not need to be transferred in the whole heat treatmentprocess. The electric heating bands are connected with the rollers through the calipers and tensioned through the hinges, so that the electric heating bands cannot rotate along with the tank body, heating is uniform and stable, equipment connected with the electric heating bands cannot be twisted, and the practicability is high.

Description

technical field [0001] The invention relates to the technical field of tank body welding equipment, in particular to a pre-weld preheating and post-weld heat treatment device for a tank body. Background technique [0002] Welding of the tank body in a low temperature environment is prone to defects such as cracks and incomplete penetration. Especially for aluminum alloy materials, because its thermal conductivity and thermal expansion coefficient are nearly twice that of carbon steel, welding defects are more likely to occur when welding in a low temperature environment. [0003] At present, domestic tank manufacturers generally use traditional methods such as fire roasting and warm air to preheat tanks in low-temperature environments before welding. After welding, the tanks are transferred to a heat treatment room for post-weld heat treatment to eliminate residual stress. . The shortcomings of the traditional pre-weld preheating and post-weld heat treatment processes are: ...

AI Technical Summary

Problems solved by technology

The shortcomings of the traditional pre-weld preheating and post-weld heat treatment processes are: (1) uneven distribution of preheating temperature, which affects the welding formability and welding quality of the tank body; (2) low preheating efficiency and high energy consumption for heat treatment, Serious waste of energy increases production costs; (3) There are potential safety hazards in the tank transfer process, which reduces production efficiency; (4) It is not easy to work with automatic welding equipment

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