Corrosion-resistant metal membrane assembly and laser welding method thereof

Abstract

The invention, which belongs to the technical field of laser welding, relates to a corrosion-resistant metal membrane assembly and a laser welding method thereof. The corrosion-resistant metal membrane assembly comprises an isolation membrane, a gasket and a body. The gasket is fixed on the body; and the isolation membrane is arranged on the gasket. The isolation membrane assembly is formed by theisolation membrane, the gasket and the body based on steps of gasket clamping, gasket inner diameter laser welding, laser welding of the gasket outer diameter, shaping processing of a welding joint on the gasket surface, isolation membrane clamping, and isolation membrane laser welding and the like. According to the invention, With the isolation membrane and the gasket made of the corrosion-resistant materials, the problem of the high cost of the corrosion-resistant material of the body is solved based on the integrated welding structure of the gasket and the body and thus the material cost is lowered; the laser welding is used for replacing the electronic beam welding, so that the device investment is reduced, the manufacturing difficulty and the manufacturing cost are reduced, and the production efficiency is improved; and the part welding qualification rate is increased, the product characteristics can be improved, and the long-term stability and reliability of the product are enhanced.

Description

technical field [0001] The invention relates to a corrosion-resistant metal thin film assembly and a laser welding method thereof, which are applied to the manufacturing process of measuring instruments, and in particular to a pressure signal suitable for measuring pressure signals of acid, alkali and salt corrosive media in petrochemical and chemical industries. The production of the transmitter belongs to the technical field of laser welding. Background technique [0002] In the production process of petrochemical and chemical industries, the corrosion of various acids, alkalis, salt production raw materials and other substances on production equipment is a common problem. The pressure transmitter used in process measurement is seriously corroded. , greatly reducing the service life of the instrument. In the actual measurement process, frequent instrument failures occur due to corrosion. Enterprises maintain the normal operation of the production process by frequently rep...

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Problems solved by technology

However, electron beam welding also has the following disadvantages: 1. The equipment is expensive, usually more than 10 million yuan for a piece of equipment; 2. The equipment is complex in composition, difficult to operate, and requires high technical level of operators; 3. Production Low efficiency, electron beam welding is done in a vacuum chamber, due to the existence of the vacuum chamber, the vacuuming time is long, which affects the welding cycle time

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