The development of technology in the machine tool industry welding with welding application development structure of machine tool products and the development of. The leading products of machine tool industry in China mainly metal cutting machine tool products, forging machinery products, casting machinery, woodworking machine tool products, tools, tools and machine tool accessories etc.. Among them, metal cutting machine tools, forging machinery and foundry machinery products is the main field of application of welding technique in machine tool industry. From a technical level of machine tool product development to see the development of welding technology in the machine tool industry is divided into three stages.

1 welding technology as stage aided process means

In this stage, from twentieth Century 50's to the early 70's. This stage is in the machine tool product development is the stage of imitation of foreign products of machine tool. When the metal cutting machine copy success with 1 and 63 2A125 type vertical drilling machine, lathe, 6H82 type universal milling machine, 1617 type horizontal lathe and 262 horizontal boring machine 150, accounting for about 204 of the total number of the master machine varieties for 70%; forging machinery mainly imitate developed open press, 315 tons of the following closed single point press, air hammer, 300 tons of double disc friction press, shears, four-pillars hydraulic machine and rolling machine and automatic forging machine and greater demand for general forging machinery products.

This machine tool product structure basically all the casting structure, so this stage of welding technology is the only service for the product as an auxiliary means of welding process, the key is the casting defects of welding structure of the complement and the product tank, electric box cover and some other small non main parts. Welding method is mainly manual electric arc welding, or acetylene, master by the workers themselves, no welding professional and technical personnel and technical measures for normal, no special welding workshop. Enterprises are generally larger, welding and other casting workshop and assembly workshop together, the production area of co..

2 welding technology application stage

In this stage, from twentieth Century 70's to the early 80's, as the welding technology application stage. This stage of machine products based on imitation in twentieth Century 50 years, began a high precision machine tool research and development. In metal cutting machine tools, only in twentieth Century 70 years in succession to the second car factory provides 7664 sets of machine tools with high level, to meet the second car factory that the required machine equipment more than 98%; in forging machinery, equipment for the second automobile factory, research and development of manufacturing 115 510 sets of general and special forging machinery and parts production line. At the same time, this stage various professional sentinel plants accumulated master forging machine has 257 kinds of varieties.

At this stage, with the overall welding technology, some enterprises began to use welded structure in the product structure design of machine tools, such as Ji'nan second machine tool plant of more than 800 tons of mechanical press product base, beams and other large parts and cylinder parts; the second machine tool plant in Qigihar, in 1973 the development and design of the J81-1250 cutting edge press the welding parts, main structure parts as the base, the column and the head, the maximum welding part weight is 25 tons; 1978~1979 years the plant in Z41-30 type nut cold heading machine bed, pressure vessel parts cold extrusion press of TA88-200, use of welding structure. The welding structure is adopted, promote the development of technology of welding machine industry.

From the late 70's of the twentieth Century, some enterprises began to organize the establishment of an independent welding workshop, increases the workshop crane equipment and improve the welding process. Such as Ji'nan second machine tool factory was established in 1975 at the time of welding workshop, workshop area of 5275 square meters, the maximum lifting capacity of 50 tons, the welding process means from simple manual electric arc welding, to the development of the submerged arc welding, electroslag welding and semi-automatic cutting blanking and ray inspection method. To illustrate the application of welding machine industry, a start into a comprehensive engineering technology field, laid the foundation for the third stage of the technology introduction of machine tool products.

3 welding technology leading the process stage

In this stage, the introduction of technology from twentieth Century the beginning of the 80's until now. In this stage, the machine tool industry through the introduction of foreign advanced design and manufacturing technology, and promoted the rapid development of advanced machine tool products. As in the metal cutting machine tools, Beijing first machine tool plant in cooperation with the Japanese Hitachi Seiki company production of K type milling machine, and successfully developed a new series of CNC milling machine, at the same time, in cooperation with the Federal Republic of Germany 's Wade, Coburg company Longmen CNC milling machine; cooperative production, horizontal lathe Ji'nan first machine tool plant and Japan Yamazaki blacksmith, Ji'nan second machine tool plant in cooperation with the French BMO company developed 4 * 10m large Longmen movable beam type five processing center and 200 large CNC floor type boring and milling machines and 2.4 × 13m large Longmen mobile five processing center; Wuhan Heavy Duty Machine Tool Factory and the Federal Republic of Germany Xishi. Rowley & company, produced with international level of processing diameter 1.4~2.5 meters vertical lathe, boring bar diameter 260mm above the floor type boring and milling machine, heavy machine tool. In forging machinery, Ji'nan second machine tool factory took the lead in the introduction of the United States of America VERSON all steel mechanical press, 8 series of 35 varieties of heavy, heavy mechanical press design, manufacturing, testing a full set of technology, began a heavy, heavy forging equipment introduction, absorption, digestion phase.