The application of welding technology in the machine tool industry has been developed with the introduction of foreign product technology. At the same time, the development of domestic welding technology has also promoted the application of welding technology in the machine tool industry. At present, the main welding techniques used in the machine tool industry have the following aspects:
Steel plate pretreatment technology application
The steel plate pretreatment production line of the machine tool industry was started in 1993 by Jinan No. 2 Machine Tool Plant. It started on the basis of 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. The 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: steel plate leveling thickness 8 ~ 40mm, leveling width 3m; pretreatment steel plate thickness 8 ~ 160mm, effective width 3m; processing structure maximum specification is 1500 (width) × 800 (height); pretreatment speed is 0 ~ 4m / min; annual processing capacity of 40,000 tons / year; using PC automatic control and manual control two ways. The steel plate pretreatment production line solves the bad factors such as rust and scale of raw materials, and improves the quality of CNC cutting blanking and the appearance quality of machine tools.
CNC cutting technology application
In 1982, the second CNC machine tool factory began to apply the domestic CNC cutting machine to the cutting and blanking of steel plate parts. In 1988, the computer automatic programming nesting technology was applied to increase the utilization rate of steel plate from 70% to 74%; 1992 In the year, Jinan No. 1 Machine Tool Plant introduced the US plasma CNC cutting machine and laser CNC cutting machine, and started the application of CNC plasma and laser cutting in the machine tool industry, so that the cutting precision of thin steel plate with thickness of 0.5~8mm reached 0.5~1mm. During the "Seventh Five-Year Plan" period, Jinan No. 2 Machine Tool Plant developed and researched the precision cutting technology of thick steel plate CNC, so that the thickness of CNC precision cutting of thick steel plate reached 275mm. The project won the first prize of the "Seventh Five-Year" technological achievements of the machine tool industry of the Ministry of Machinery. In 1993, Jinan No. 2 Machine Tool Plant increased the cutting thickness of CNC plasma carbon steel in the machine tool industry from 8mm to 25mm by introducing CNC underwater oxygen plasma cutting machine, which reduced the cutting deformation of medium and heavy plates and improved the cutting of medium and thick steel plate parts. Precision and cutting quality.
Application of high efficiency welding technology such as gas shielded welding
With the introduction of foreign technology, in 1981, Jinan No. 2 Machine Tool Plant first applied Φ1.6 solid CO2 gas shielded welding technology to replace the Φ2.4 core argon-rich gas shielded welding process of American VERSON All Steel Machinery Press Company. The welding process of the large welded parts of the press was tackled and succeeded. The project won the third prize of the Ministry of Machinery Science and Technology Progress. In 1986, Qiqihar No. 2 Machine Tool Plant applied Φ1.2 solid core argon-rich gas shielded welding technology to solve the welding problem of large welded parts of presses, and used the argon-arc copper surfacing technology to weld copper on the surface of pistons, cylinders and other workpieces. Layer surfacing, which is a success in replacing the traditional copper sleeves in China. In 1992, Jinan No. 1 Machine Tool Plant applied Φ0.8 solid CO2 gas shielded welding for the first time on the thin-plate cover structural parts of machine tools. During the "Seventh Five-Year Plan" period, Jinan No. 2 Machine Tool Plant also applied CO2 gas shielded welding to the extended welding of the tension bolts of the press. The project won the second prize of the "Seventh Five-Year" process achievements of the machine tool industry of the Ministry of Machinery. At present, high-efficiency welding techniques such as gas shielded welding have been widely used in machine tool beds, gears, eccentric bodies, rocker shafts, cylinder blocks, pipe flanges and casings that are not processed after welding, and have become machine tool industries. One of the main processes of welding.
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