Electricity auxiliary heater and production method thereof

Abstract

The invention provides an electricity auxiliary heater and a production method thereof. The electricity auxiliary heater comprises a water cavity for storing water and heat tubes which stretch into the water cavity and are used for heating water in the water cavity. The water cavity comprises a water cavity straight barrel, two water cavity transition connection rings and two water cavity seal heads. Two ends of the water cavity straight barrel are connected with the corresponding water cavity seal heads through the water cavity transition connection rings. The water cavity straight barrel is a cylindrical barrel body with a hollow cavity. The water cavity transition connection rings are equipped with first annular lug bosses. Two sides of the first annular lug bosses are equipped with first water cavity lap joint rings and second water cavity lap joint rings. The water cavity transition connection rings, the water cavity straight barrel and the water cavity seal heads are concentric. The electricity auxiliary heater and the production method have the beneficial effects that the seal heads and the straight barrel are concentric; a yield is high; and parts or components are mutually independent and do not restrict each other in a production process.

Description

technical field [0001] The invention relates to the technical field of sheet metal forming, in particular to an electric auxiliary heater and a manufacturing method thereof. Background technique [0002] The water chamber assembly is generally formed by welding the water chamber head and the water chamber straight barrel. Ideally, after welding, the head and the straight barrel are coaxial and equal in diameter. However, due to the small quantity and differences, it is not suitable to invest in high-cost automation equipment, so the welding method can generally only be performed by skilled workers borrowing simple tooling and simple equipment. Due to factors such as equipment stability, material characteristics, tooling characteristics, and manual operation instability, the water cavity head and the water cavity straight barrel cannot be perfectly coaxial and of equal diameter. The connection between the water cavity head and the water cavity straight barrel It cannot be w...

AI Technical Summary

Problems solved by technology

However, due to the small quantity and differences, it is not suitable to invest in high-cost automation equipment, so the welding method can only be carried out by skilled workers using simple tooling and simple equipment.

Due to factors such as equipment stability, material characteristics, tooling characteristics, and manual operation instability, the water chamber head and the water chamber straight barrel cannot be perfectly coaxial and equal in diameter, and the joint between the water chamber head and the water chamber straight barrel Can not match well, so that there are defects such as virtual welding, misalignment, cracks, etc. in the weld, the qualified rate of one-time welding is low, and the welding efficiency is low, so that the welding quality cannot meet the demand and the product cost remains high

At the same time, because the tolerance of the connection between the head and the straight barrel is difficult to control within the allowable range, the size of the product exceeds the allowable tolerance range, which increases the failure rate of the product and increases the cost of the product, and this dislocation welding As a result, the pressure bearing capacity of the container will be insufficient, so the fatigue life test is difficult to meet the requirements

[0003] At the same time, in the manufacturing process of the electric auxiliary heater with a shell, the general method is to make the water cavity assembly first, then roll the straight barrel in the shell part and put it outside the water cavity for straight seam welding, and then The head in the shell part is welded together with the straight barrel by girth welding, which also has the defect that the shell straight barrel and the corresponding head cannot be coaxial, and many previous manufacturing processes restrict the subsequent processes.

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