Port sealing process of heating container of electric water heater

Abstract

The invention relates to a port sealing process of a heating container of an electric water heater, which comprises the following steps: first clamping a fixture for a red copper tube on a machine tool, adopting an edge-less cutter with an arc-shaped side on one end, slowly extruding the edge of the port of the red copper tube which rotates at high speed with the front end of the edge-less cutter so that the port of the red copper tube produces high temperature when rotating at high speed and having point-surface extrusion friction with the front end of the edge-less cutter, and enabling the port to close up inwards with the extension, pressing and stretching characteristics of red copper; forming a new port after the port of the red copper tube closes up inwards, extruding the new port with the arc-shaped end of the edge-less cutter, and so on, keeping closing up inwards until the port is gradually reduced and finally sealed in the center; and the port sealing process of the heating container of the electric water heater has the advantages of simple process, no seam and no welding, can well prevent welding and the oxidation of high-temperature melting points, can achieve attractive overall appearance, and is characterized by higher compressive strength, longer service life and the like.

Description

technical field [0001] The invention relates to a port sealing process for a cup-type heating container of an instant electric water heater, and belongs to the technical field of mechanical manufacturing processes. Background technique [0002] At present, the cup-type heating container (also known as the heating cup container) of the instant electric water heater is generally made of metal materials such as stainless steel, aluminum alloy or red copper, and its shape is mainly cylindrical and a small amount of rectangle. The ports at both ends of this heating cup container are welded by gas welding or argon arc welding to weld the stamped cover and cylinder. The high temperature causes the metal to oxidize easily. In order to overcome the problems of this welding process, Germany's Sibao Yachuang Electric Water Heater Co., Ltd. adopts a welding-free connection technology, which uses the flange of the cylinder port and the flange of the impacted cover, and then flanges the ...

AI Technical Summary

Problems solved by technology

Although this processing technology avoids the oxidation process of welding and high-temperature melting point, it still has seams and the compressive strength is not high; moreover, there is an annular convex ring at the junction of the cylinder body and the cover, which affects the overall appearance and is not easy to be damaged during the assembly process. bring inconvenience

Images