Application of the hottest welding technology in m

2022-07-30
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Application of welding technology in machine tool industry. At the same time, the development of domestic welding technology also promotes the application of welding technology in machine tool industry. Application of welding technology in machine tool industry. At the same time, the development of domestic welding technology also promotes the application of welding technology in machine tool industry. At present, the main welding technologies applied in the machine tool industry are as follows:

steel plate pretreatment technology application

the steel plate pretreatment production line in the machine tool industry was started by Jinan No. 2 machine tool plant in 1993. It was started on the basis of the use in the shipbuilding industry, heavy machinery industry and mining industry. The pretreatment production line is jointly developed and manufactured by the plant and Qingdao No. 3 foundry machinery factory. Its main process flow is: steel plate leveling, preheating, shot blasting, automatic painting and drying, with a total length of 60 meters. The main technical parameters are: the leveling thickness of steel plate is 8 ~ 40mm, and the leveling width is 3M; The thickness of pretreated steel plate is 8 ~ 160mm, and the effective width is 3M; The maximum specification of processing structural members is 1500 (width) and 800 (height); The pretreatment speed is 0 ~ 4m/min; The annual processing capacity is 40000 tons/year; PC automatic control and manual control are adopted. The steel plate pretreatment production line solves the corrosion, scale and other adverse factors of raw materials, and improves the quality of NC cutting blanking and the appearance quality of machine tool products

application of NC cutting technology

in 1982, Jinan No.2 Machine Tool Plant began to apply the domestic NC cutting machine to the cutting and blanking of steel plate parts. In 1988, the computer automatic programming nesting technology was applied, which increased the utilization rate of steel plate from 70% to 74%; In 1992, Jinan No.1 Machine Tool Plant introduced the American plasma numerical control cutting machine and laser numerical control cutting machine, and started the application of numerical control plasma and laser cutting in the machine tool industry, making the cutting accuracy of 0.5 ~ 8mm thick steel sheet reach 0.5 ~ 1mm. During the Seventh Five Year Plan period, Jinan No. 2 machine tool plant developed and studied the NC precision cutting technology for thick steel plates, making the NC precision cutting thickness of thick steel plates reach 275mm. This project won the first prize of the Seventh Five Year Plan process achievement in the machine tool industry of the Ministry of machinery. In 1993, Jinan No. 2 machine tool plant introduced a numerical control underwater oxygen plasma cutting machine to increase the cutting thickness of polyamide Ultramid b3eg10 Si (Si = surface improvement), which is used to cut 50% of NC plasma carbon steel in the machine tool industry and is filled with glass fiber, from 8mm to 25mm, reducing the cutting deformation of medium and heavy plates and improving the cutting accuracy and cutting quality of medium and heavy steel plate parts

application of high-efficiency welding technologies such as gas shielded welding

with the introduction of foreign technologies, the 1.6 solid core CO2 gas shielded welding technology was first applied by Jinan No. 2 machine tool plant in 1981 to replace the 2.4 flux cored argon rich gas shielded welding process of American Verson all steel mechanical press company, and the key problems in the welding process of large welding parts of the press were tackled successfully. The project won the third prize of scientific and technological progress achievement of the Ministry of machinery. In 1986, Qiqihar No. 2 machine tool plant applied the 1.2 solid core argon rich gas shielded welding technology to solve the welding problem of large welding parts of the press, and used the wire electrode argon arc copper surfacing technology to surfacing the copper layer on the surface of piston, cylinder and other workpieces, replacing the traditional copper sleeve in China. In 1992, Jinan No. 1 machine tool plant first applied 0.8 solid core CO2 gas shielded welding to the structural parts of the thin plate cover of the machine tool. During the Seventh Five Year Plan period, Jinan No. 2 machine tool plant also applied CO2 gas shielded welding to the lengthening welding of the tension bolt of the press. This project won the second prize of the Seventh Five Year Plan process achievement in the machine tool industry of the Ministry of machinery. At present, gas shielded welding and other high-efficiency welding technologies have been widely used in machine tool bed, gear, eccentric body, rocker shaft, cylinder block, pipe flange and cover that are not processed after welding, and have become one of the main welding processes in the machine tool industry

application of vibration aging technology

the new process of vibration aging is a new process technology developed in the 1960s. This process has the advantages of strong applicability, energy saving, environmental pollution reduction, shortening production cycle and improving production efficiency. Jinan No. 2 machine tool plant began to apply this process to the weldments of imported products in 1981, and achieved good results. Huangshi forging machine tool plant conducted in-depth research and application of vibratory stress relief technology during the Seventh Five Year Plan period, and won the second prize of the Seventh Five year process achievement in the machine tool industry of the Ministry of machinery. At present, the process has been widely used in the machine tool industry

application of welding automation and mechanization technology

apart from CO2 semi-automatic welding, the welding automation in the machine tool industry is mainly reflected in the application of submerged arc automatic welding, which is mainly applied to the butt welding of steel plates and the cylinder welding of pressure vessels. In 1993, Jinan No. 2 machine tool plant introduced the automatic seam tracking system of the United States, which was applied to the unification and welding power supply in the fields of railway and aerospace. It transformed the domestic cross operating frame automatic submerged arc welding equipment purchased in 1988 with the materials from the same material group. It realized the double-sided automatic tracking submerged arc welding of the pressure vessel cylinder and head below 18mm in thickness without beveling, and achieved great success. Welding mechanization is mainly the application of welding positioner. In 1981, Jinan No. 2 machine tool plant started the application research of positioner on the imported welding gear, but it was not popularized. It only transformed the positioner into an automatic cutting equipment for gear web. Since 1988, the welding positioner has been applied in Shanghai forging machine tool plant, Yingkou forging machine tool plant and Huangshi forging machine tool plant, which has improved the degree of welding mechanization. In addition, in 1998, Jinan No.2 Machine Tool Group Co., Ltd. successfully applied the positioner to the welding of 40grmo high alloy gears in the cooperation with Komatsu of Japan

application of propane high-efficiency, energy-saving and environment-friendly cutting gas

liquefied cutting gas such as propane is a high-efficiency, energy-saving and environment-friendly gas promoted by the eighth and ninth five year plans of the country. In 1993, Jinan No.2 Machine Tool Group Co., Ltd. began to study the industrial application of propane liquefied gas. After a large number of comparative tests, 1 it adopted the technology of combining simulation filtering and digital filtering. In 1998, C3 series liquefied gas was used to completely replace acetylene gas, which greatly reduced the production cost, improved the production safety and cutting quality. Equipped with a new type of gas cutting nozzle, it improved the production efficiency

application of nondestructive testing technology

the application of nondestructive testing technology in the machine tool industry starts from the main welds of container parts of machine tool products. For example, in 1975, Jinan No. 2 machine tool plant established a radiographic testing room while establishing a welding workshop. In 1989, the quality assurance system for pressure vessels was established and improved according to national standards, and the standards GB150 steel pressure vessels and JB4730 nondestructive testing for pressure vessels were fully implemented

in the early 1990s, the machine tool industry began to apply ultrasonic flaw detection technology to carry out 20% sampling inspection on the main welds of the main structural parts of machine tool products, and implemented the national standard gb11345-89 manual ultrasonic flaw detection methods and classification of flaw detection results for steel welds. The welds of the main parts inspected include the welds of the main vertical plate of the press base, cross beam and sliding block; Welds on column and sliding block guide rail; Shaft sleeve weld of beam; Upper and lower butt welds of substructure, cross beam and workbench, as well as all splicing plate welds and peripheral welds of gear

application of centralized gas supply technology

co2 gas supply mode has also been paid attention to in the welding production of machine tool industry. At present, many domestic manufacturers basically use single bottle and single machine gas supply, which not only limits the expansion of production scale, but also has a great impact on welding production management and welding quality. The centralized gas supply of CO2 gas improves the welding production efficiency. At the same time, the purity of CO2 gas is increased by 0.4 ~ 0.6%, and the moisture content of the gas is reduced by 0.25%, which ensures the welding quality. It is also applied in the welding production of machine tool industry. For example, in 1992, Jinan No. 2 Machine Tool Group Co., Ltd. built a CO2 centralized gas supply device while establishing a new metal structure plant. The total working pressure of the device is 0.15Mpa, and the capacity of the intermediate storage tank is 2m3. It can continuously and stably supply gas to more than 120 CO2 welding machines in the plant. At that time, the annual welding production capacity was 12000 tons, and by 2002, the annual welding production capacity was 15000 tons

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