Large
forging production cycle is long, occupy large equipment, raw materials, energy, industrial AIDS and labor consumption is huge, serious environmental pollution, therefore, according to the market demand, constantly adjust the industrial structure, improve material utilization, reduce consumption, material saving, energy saving, pay attention to environmental protection, reduce production costs, improve economic and technical benefits, to improve the manufacturing level has important significance. Due to our country attaches great importance to the development of forgings manufacturing industry, it has recently had a considerable scale and a certain level of production system, and has the capability to provide all kinds of large forgings for national economic development. For example, in the mid-1990s, we were able to produce complete sets of qualified 600MW large forgings for thermal power equipment. In terms of science and technology, from the application of lead, plastic mud, dense grid moire, photoplasticity and other physical simulation technology, the study of holes in the blank, loose forging, compaction, to the change of grain size and other microstructures research; From the simple plastic forming analysis, to the comprehensive use of thermal simulation, micro simulation, finite element numerical simulation, plastic machining parameters to provide a comprehensive process information and field information. Many new achievements have been made in ingot crystallization, forging deformation and post-forging treatment, and the quality control technology and short flow process have been gradually developed, which has promoted the scientific and modern process of large-scale forging. However, in terms of quality, variety, cost, delivery time and development ability, large-scale forging production can not meet the needs of the development of domestic and foreign markets. We still need to catch up with advanced levels in industrial restructuring, institutional reform, business management, scientific and technological development, energy conservation and consumption reduction, and improvement of quality and efficiency.
The production of large-scale forgings involves smelting, ingot casting, heating, forging, rough machining, heat treatment, quality testing and many other technical links. Long cycle, strong continuity, labor intensive, high science and technology content, production is very difficult, must carry out strict management and scientific coordination, in order to produce high-quality qualified forgings. In addition, large forging body is huge, hot working process in high temperature, high pressure, unstable state, affected by many factors, it is difficult to detect and control. In the traditional large forging, there are some unscientific and backward techniques, which need to be reformed. At the same time, the production nature of large forgings is a single piece, small batch, its variety and grade often change, and the flexibility is strong. To sum up, in the production and science and technology work of large forgings, we should take the scientific and modern as an important research topic.
this is large forgings produced by tongxin precision forging company: