Manufacturing process and application of a large-scale gasket metal skeleton without welding technology

Abstract

The invention discloses a manufacturing process and application of a large-scale gasket metal frame without welding technology, comprising the following steps: 1) taking materials, taking out an elliptical ring from a metal plate to obtain an elliptical ring body; 2) cold simmering and deforming, and cold working the elliptical ring To the specified outer diameter of the ring, the ring body is obtained; 3) high temperature molding, the ring body is formed at high temperature to make the ring body density uniform; 4) stress relief, the ring body is heat treated to eliminate the stress and make The hardness of the torus is uniform. The metal skeleton manufactured by the invention is integrally formed, which realizes no welding technical requirements, and is evenly contacted with the flange under the action of the bolt pre-tightening force, so that the springback coefficient of the metal skeleton is kept consistent, so that the sealing performance of the product is higher and more stable. And longer service life.

Description

technical field [0001] The invention relates to a manufacturing process and application of a large-scale gasket metal skeleton without welding technology. Background technique [0002] Large-scale composite metal gaskets are composite gaskets composed of different non-metallic materials and metal materials. Among them, corrugated composite gaskets and toothed composite gaskets are particularly prominent, such as figure 1 As shown, there are various types of gaskets, all of which have metal skeletons, and the national standard for the sealing thickness of metal skeletons is between 0-5mm, and once the outer diameter of the gasket exceeds 2 meters, it is difficult to produce Monolithic parts, ie: it is difficult to produce a monolithic metal frame. [0003] After investigation, manufacturers in the industry use welding technology for their metal skeletons when producing gaskets with an outer diameter of more than 2 meters, because the technology for producing plates at home a...

AI Technical Summary

Problems solved by technology

Therefore, the gasket made of metal skeleton with low quality welding part has the following problems in the actual installation and use process: 1. Due to the phenomenon of insufficient penetration and overburning of the welding head, under the effect of pretightening force 2. Since the welded joint has not undergone heat treatment, the hardness of the welded part of the metal frame is 5-10HB higher than that of other parts. Under the action of pre-tightening force, the sealing gasket cannot meet the flange uniform contact of surfaces, resulting in localized leakage

The above drawbacks are due to the fact that the surface of the metal frame is covered with a layer of non-metallic material, which prevents the seller from inspecting the quality of the metal frame in the middle.

Images