Metal frame profile welding process

Abstract

The invention provides a metal frame profile welding process. A metal plate is molded through cold pressing in a metal frame cold pressing machine; a roller mold with a thickness smaller than 2 mm is arranged at the tail end of the metal frame cold pressing machine; two edges of a door / window profile are aligned along the end part, and a joint is finely adjusted; a part to be welded is cleaned by acid washing passivation liquid, and the surface of the metal frame is cleaned by acid liquid to remove surface oxides. The used acid washing passivation liquid comprises the following components in percentage by weight: 15% of nitric acid, 8% of hydrofluoric acid and 73% of water, or 10% of nitric acid, 5% of potassium dichromate and 85% of water, or 15% of hydrochloric acid, 20% of nitric acid and 65% of water. The metal frame profile welding process adopts a welding angle assembly mode, and performs the sanding mold repair treatment for weld lines, so that the profile cavity fit gap problem and the angle assembly butting part strength problem are solved.

Description

technical field [0001] The invention relates to a metal frame profile welding process, belonging to the technical field of machinery. Background technique [0002] The technical method of door frame profile welding is touch welding technology. Its operating principle is to first overlap the two sides of the seam in the door frame groove, use a butt welding machine, and then weld the seam at a certain interval along the gap. During the welding of the groove joints, there will be many protruding and uneven solder joints. These raised solder joints will continuously rub and collide with the glass installed in the groove when the glass door is opened and closed, which is easy to make the glass Cracks on the corners. In addition, the door frame profile welded by this technology is not strong enough, easy to crack, and has a short service life. There are several reasons for this. Among them, when cleaning the surface of the metal frame, the cleaning force is not enough; the clea...

AI Technical Summary

Problems solved by technology

[0002] The technical method of door frame profile welding is butt welding technology. Its operating principle is to first superimpose the two sides of the seam in the groove of the door frame and then use the butt welding machine to weld the seam along the gap at a certain interval. Many protruding and uneven solder joints will be produced when welding the groove junction of the glass door. These raised solder joints will continue to rub and collide with the glass installed in the groove when the glass door is opened and closed, which is easy to make the glass cracks in the corners

In addition, the welding place of the door frame profile welded by this technology is not strong enough, easy to crack, and the service life is not long

There are several reasons for this, among them, when cleaning the surface of the metal frame, the cleaning strength is not enough; the cleaning strength of the welding place is not enough, resulting in poor welding quality

In addition, the other is that the welding method adopted is not suitable for the welding of metal frame profiles, resulting in poor welding quality and easy cracking