| In the process of manufacturing products in the field of production and processing technology of cleaning processes are an integral part of the process, for uses such as automotive engine performance require a high level of product, quality of the cleaning procedure has an important impact on the quality of the product.For the areas of clean technology, and technology continues to improve in recent years, product maturation. Industrial cleaning technology is most generally used in the field of ultrasound. steam washing, spraying, some new cleaning technique and equipment is gradually being developed and applied, such as vacuum cleaning, plasma cleaning, UV/hydrogen smell cleaning, laser cleaning, dry ice cleaning, and showed good results and prospects. At the same time, accompanied by the improvement of the overall level of industrial, no-clean technology is also beginning to be promoted.Large differences in the shapes of parts for manufacturing enterprises, especially for some with deep holes, slender holes, blind holes, stepped complex parts of special shapes such as porous element, such as cars, diesel engine connecting rod housing, cleaned with existing technical equipment could not meet the cleanliness requirements part. Therefore, and in advanced manufacturing technology application constantly universal of today, many enterprise of products line automation degree has is large of improve, but in technology process of end, and traditional of cleaning job way--artificial cleaning is no are corresponding of improve, its intensity large, and work environment bad, and cleaning liquid not recycling not processing, produced up not to environmental requirements, series of problem, became effect production efficiency of bottleneck. A practical problem faced by these enterprises is, although you can produce products of high quality, high precision mechanical parts, but due to the poor quality of low efficiency of the cleaning process and seriously reduces the performance of assembled products, such as engine products.Therefore, in accordance with part surface characteristics and particularities of the process, implemented through the design and development of specialized accessories or equipment meet the requirements of parts cleaning procedure, is currently a development orientation in the field of industrial cleaning technology, has emerged a large number of patented products in this area.This project comes from the production of connecting rod of the study on enterprise projects, goals for the development of automatic cleaning device of engine connecting rod. Main research of engine connecting rod cleaning equipment using Mitsubishi PLC kinematic and dynamic system of sequence control, using servo-proportional valve-controlled hydraulic synchronization scenarios, focusing on cleaning machine fixture synchronous control of hydraulic double-cylinder lift in the movement, access to good quality of cleaning technology for cleaning equipment for engine connecting rod.This paper first gives the brief introduction of current situation of cleaning machine of engine connecting rod at home and abroad;according to a large number of domestic and foreign literature on cleaning equipment for engine connecting rod working principle and process are analyzed; The control system of engine connecting rod cleaning line PLC control has been studied, equipped with manual and automatic control is realized. We design the control scheme selection and part of the electrical hardware of control system of spraying and drying control system, hydraulic stroke control system, monitoring system. And studied the contact and impact between the various systems. Then focuses mainly on hydraulic position control system in hydraulic cylinder were analyzed and resolved synchronous control and control precision problem. Finally, design software for PLC control of each system, and through the touch screen technology to control process visualization and modify control parameters. |
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