Welding (connection) is two or more materials (homogeneous or heterogeneous) by heat or pressure (or both in combination) have atoms (molecules) into one inter-connected with the connection method. Welding (connection) is a high quality and efficiency of the permanent connection of materials process methods, is an application volume, application of a wide common processing technology.
Modern Welding (connection) technology has moved from a traditional thermal processing techniques developed to a set of materials, metallurgy, structural, mechanical, electronics and other categories of science as one of the engineering technology disciplines. Welding (connection) has penetrated into all areas of manufacturing, are widely used in machinery manufacturing, metallurgy, boiler pressure vessels, construction, shipbuilding, marine engineering, automotive, locomotive, petrochemical ï¹‘ aerospace, construction machinery, bridges, power energy and other industries and sectors, a direct impact on product quality, reliability and longevity, and production costs, efficiency and market responsiveness. Welding (connection) itself metallurgy, structure and process characteristics in determining the structure of almost all welding welding (connection) technology have become key technologies in manufacturing technology.
In several decades of accumulated research and production of a large number of welding (connection) technical data and the data obtained based on these comprehensive technical information, is to promote the national welding (connection) technology innovation and technological progress of valuable resources. Rapid development of science and technology in modern times, the standardization of the equipment manufacturing industry standard welding (connection) technology information needs and the growing dependence increased, in the fierce competition, development, production, operation, management and technological innovation activities are all with information obtained are closely related. However, due to welding (connection) industry itself has an open, decentralized characteristics, information channels are not clear, these data resources have not been fully maximize the use of scientific data sharing project in the country, driven by the shared network of welding (connection ) technology, data sources, collate and assess scientific analysis, to maximize data sharing, to play the potential value of scientific data resources.
So that national resources can be fully effective use of repetition, as the country's overall development services, as well as relevant government departments to provide technical support for decision-making, but also for welding (connection) technology research and development to provide important basic resources, avoid duplication of development and the blind development improve the level and efficiency of scientific and technological innovation, which to upgrade the overall technical level of equipment manufacturing industry and the competitiveness and sustainable development of related industries the importance of comprehensive benefits is huge.
Welding (connection) technology to provide users of scientific data resources are the main contents of commonly used materials welded structures, welding methods and equipment, welding materials, welding materials, welding design and manufacturing, welding safety and health, welding standard patent journal , eight areas of welding technology dynamic data.
- Welded structure includes a variety of common materials to be welded materials (ferrous metals, nonferrous metals) chemical composition, mechanical properties, physical properties and other data;
- Welding methods and welding electrodes includes a variety of welding methods (arc welding, resistance welding, beam welding, brazing, etc.) theory, equipment and welding material characteristics, process parameters, operating techniques and other information;
- Welding materials include various types of welding material (welding rod, wire, flux, solder with the solder flux, powder, etc.) composition, performance and technical notes, and data;
- Welding material welding material contains basic data, a variety of materials (steel, non-ferrous metals) welding key technologies, process parameters and other information;
- Design and manufacture of welded structures containing structural basis for the welding, welding design, welding structure manufacturing process, welding equipment, welding quality inspection and other information;
- Welding Safety and Health contains health and safety characteristics of welding, welding safety and health standards, welding safety technology, welding flux and other information on health protection of labor;
- Welding standard patent journal contains the directory of welding standards and regulations, patent welding, welding journals and other information;
- Dynamic includes welding technology welding technology, welding manufacturing typical achievement, Welding Development Strategy Forum, welding results, and other information.
First, the welding of the harmful factors TIG harmful factors affect the human body in three areas: (1) Tungsten radioactive thorium in thorium are radioactive elements, but when TIG tungsten thorium radiation dose is very small, within the allowable range, there is little risk. If radioactive gases or particles into the body as internal sources, it will seriously affect health. (2) high-frequency electromagnetic fields using high-frequency arc, the resulting high-frequency electromagnetic field intensity in the 60 ~ 110V / m, with more than reference standard (20V / m) times. However, as time is very short, little effect on the human body. If you frequent the arc, or the high-frequency oscillator as a stable arc welding process device in continuous use, the high-frequency electromagnetic fields can be harmful to one of the factors. (3) harmful gases - ozone and nitrogen oxides, Welding Cable, the arc column and high temperature. UV radiation intensity is much larger than normal welding alloys, the welding process thus generates a lot of ozone and nitrogen oxides; in particular, far above the reference concentration of ozone health standards. Without effective ventilation measures, these gases a great impact on human health is the most important harmful factors welding. Collector Tuisan second, security measures. (1) ventilation measures to job site welding have a good ventilation devices to emit harmful gases and soot. In addition to plant ventilation, heavy workload in welding, welding concentrated, installation of several axial exhaust fan out. In addition, the measures can be applied to local ventilation to suck out harmful gases surrounding the arc, such as using open arc exhaust hood, exhaust gas torch, light a small fan and so on. This article Source: Examination Tai (2) radiation protection measures to be adopted in a very low radiation dose of cerium tungsten. Thorium and cerium tungsten tungsten processing, should be sealed or ventilation type grinding wheel, the operator should wear masks, gloves and other personal protective equipment, wash hands after going to face processing. Thorium and cerium tungsten tungsten should be on the aluminum case for safekeeping. (3) protective measures for high-frequency High-frequency electromagnetic fields in order to prepare for and reduce the impact of the measures taken are: 1) well grounded workpiece, torch and ground cable to use metal braided wire shielding; 2) appropriate to reduce the frequency; 3) Try not to use high-frequency oscillator as stable arc devices, reducing the role of high-frequency electric time. (4) other personal protective measures mig welding wires, due to the strong effect of ozone and ultraviolet light, should wear non-cotton clothes (such as acid does, oak silk, etc.). Welding in the container could not be the case with local ventilation, air-style helmet can be used, air masks or protective masks and other personal protective measures.