Vacuum welding and sealing process for metal vacuum cup

Abstract

The invention discloses a vacuum welding and sealing process for a metal vacuum cup. The vacuum welding and sealing process comprises the following steps that 1, a cup inner shell and a cup outer shell are welded at a cup opening to form a cup body; 2, a metal block is placed at an exhaust port in the bottom of the inverted cup shell; 3, the cup body is put into a vacuum container; 4, the vacuum container is vacuumized; 5, welding is conducted through an electron beam welding machine; 6, the vacuum container is devacuumized; and 7, the cup body is taken out of the vacuum container. According to the vacuum welding and sealing process for the metal vacuum cup, the cost is greatly reduced, the welding quality is ensured, heavy metal pollution to the environment is avoided, the welding difficulty is greatly reduced, and the product percent of pass and the machining efficiency are improved.

Description

technical field [0001] The invention relates to a vacuum welding and sealing process for a metal insulation cup. Background technique [0002] At present, metal vacuum insulation cups, including live stainless steel vacuum insulation cups, titanium vacuum insulation cups, etc., the vacuuming and final sealing steps of the exhaust port are all completed together in a vacuum furnace, generally using glass-based brazing flux as Seal the exhaust port with the sealing material, raise the furnace temperature of the vacuum furnace to 500-700 degrees depending on the situation, and keep it warm for several hours. After the sealing is completed, the furnace temperature is cooled, and the entire production process is finally completed. The glass-based flux used in the existing production process needs to be specially configured and purchased, and the cost is relatively high, and the heavy metals contained are not friendly to the environment. In addition, the conductivity of glass-bas...

AI Technical Summary

Problems solved by technology

Its main achievement is to cancel the use of sealing materials, and directly weld the lower port (that is, the exhaust port) at the bottom of the cup in a vacuum environment; because there is a gap in the space between the edges of the lower ports that need to be welded, this technical solution is very important for welding. High process requirements, low yield

[0004] The invention application with the application number 201980010797.4 discloses a "Method and System for Forming a Vacuum Insulated Container": it forms one or more openings in any surface of the container, and the above "one or "Multiple openings" are welded and closed to finally form a vacuum cup body; this technical solution requires additional opening treatment for the cup body, and there is still a space gap at the edge of the opening that needs to be welded, which requires great requirements for welding process and alignment. High, difficult to popularize

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