Schneider Quantum PLC application in crankshaft and tempering heat treatment production line

Abstract: crankshaft and tempering heat treatment production line adopts the schneider PLC controller, Unity Pro software and man-machine interface, simple operation, precise control, meet the requirements of the production process. The system of data collection, analysis, processing, fast and exact by DCS automatic control system mainly centralized operation, monitoring and management role, industrial control machine and the touch screen by RS485 and RS232 communication network respectively with PLC controller controller and frequency conversion control system to realize automatic control. Keywords: schneider PLC forging tempering heat treatment overview Unity Pro software company introduced from abroad in 2000 a forging automation production line, annual production capacity of 10 - 150000 crankshaft, 'forging' as one of the main methods and means of metal processing, occupies an important position in national economy, is the equipment manufacturing industry, machinery, automobile industry, in particular, and an integral part of military industry, aerospace industry of the main processing technology, with the deepening of the economic structure adjustment, as a pillar industry of the development of car manufacturing, created a very good opportunity for the forging industry in our country. In equipment manufacturing technology and processing technology in recent years, great progress has been made, the competitiveness of the industry. Some technology has entered the world advanced level. Thanks to technology research input, especially common and basic technology research results play an insurmountable. Companies to invest millions of crankshaft was constructed in tempering heat treatment production line, 150000 tempering heat treatment of the crankshaft. Company and shandong university, Beijing institute of automation, and hangzhou 2 hospital and technical cooperation, such as heat treatment line for my company to lay a solid foundation. This production line adopts the advanced schneider PLC, touch screen, the Unity Pro software, human-computer interface, and other products, provide a reliable guarantee for control system. Metal heat treatment is one of the important technology in mechanical manufacturing, compared with other processing technology, heat treatment generally does not change the shape of the workpiece and the chemical composition of the whole, but by changing the workpiece internal microstructure, or change the surface chemical composition, or improve the use performance of workpiece. Its characteristic is to improve the immanent quality of workpiece, which generally is not visible to the naked eye can see, in order to make the metal workpiece with desired mechanical properties, physical properties and chemical properties, in addition to the reasonable choice of materials and various forming process, heat treatment process is often essential. Steel is the most widely used material in mechanical industry, iron and steel complex, microstructure can be achieved by heat treatment to control, so the steel heat treatment is the main content of metal heat treatment. In addition, aluminum, copper, magnesium, titanium and its alloys are also can through the heat treatment to change its mechanical, physical and chemical properties, for the use of different performance. Tempering treatment quenching and tempering: general habits will be the combination of high temperature quenching and tempering heat treatment known as conditioning treatment. Conditioning treatment is widely used in various important structural parts, especially those who work under alternating load of connecting rod, bolts, gears and shaft, etc. Conditioning treatment after get tempered sorbite organization, its mechanical performance than the same hardness of normalizing sorbite for optimal organization. It depends on the high temperature tempering temperature and hardness and tempering stability of steel and the workpiece with the size of section, generally in HB200 - 350. Configuration in figure 1, quenching process description and control system for heating process curve of quenching process requirements: quenching transfer time: 35 seconds or less crankshaft vertically into the quenching liquid time: within 3 seconds or less liquid quenching temperature range of use: 35 - 45℃（ In a short period of time temperature 5 ℃ or less) 2, tempering curve of heating process cooling after tempering process requirement: initial workpiece temperature: 620 ℃, end temperature: 50 ℃ cooling method: using blow spray with fast cooling and tempering heat treatment production line automatic control system of a complete set of forged steel crankshaft with advanced DCS automatic control system and schneider PLC controller, touch screen, frequency converter, and various detection components, make the whole forging steel crankshaft and tempering heat treatment production line process, heat treatment, precision, automatic operation level has reached domestic advanced level, to ensure that the heat treatment quality of products and the reliability of the system. Use Unity Pro software multimedia dynamic technology, communications, dynamic images, voice, text form and various control technology together, using the Chinese display and guide, as well as a voice prompt, and has good man-computer cooperation parameter acquisition, animation display, voice alarm, etc. The system is shown in figure 1 according to the operation flow chart picture button appears as shown in figure 2 images of these operations are used for industrial control machine equipment operation, simple operation greatly improve the efficiency of production. In process parameter Settings screen, can the quenching and tempering furnace temperature setting, automatic switch, manual input opening, temperature deviation, the craft is beat up and down, spray cooling time, into the quenching time, waterlogging caused by excessive rainfall time can be modified. Also is the color of the image data for purple title can not be modified. As shown in figure 3 when open membrane panel power supply, touch the film screen monitoring system automatically into the opening screen.
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