Casting is one of the main methods for obtaining blanks for mechanical products, and is the basic industry for equipment manufacturing. In recent years, with the development of the host industry in many fields, the quality requirements for castings are getting higher and higher, labor costs, safety and environmental protection pressures are also increasing. The casting industry implements quality brands and innovation-driven strategies to improve the quality stability of castings and the same Sexuality is an inevitable requirement for product development. Promoting the implementation of the “two integrations†of the foundry industry to realize key process intelligence, key position robot replacement, and intelligent optimization control of the foundry production process is an inevitable trend of casting development technology upgrade. The use of advanced and applicable new casting technology to improve the automation of casting equipment, especially the application of industrial robot automation technology, is a key measure for foundry enterprises to achieve sustainable development.
Development status of industrial robots in light alloy casting industry
Industrial robot is an important automation equipment for modern manufacturing integrating mechanical, electronic, control, computer, sensor, artificial intelligence and other scientific advanced technologies. Since the United States developed the world's first industrial robot in 1962, robotics and its products have developed rapidly. It has become an automated tool for flexible manufacturing systems, automated factories, and computer integrated manufacturing systems. Industrial robots are becoming more and more The field has been applied. Industrial robots have been widely used in manufacturing, especially in the automotive industry. For example, in welding, surface spraying, loading and unloading, assembly, etc., robots have replaced manual work.
As we all know, reducing energy consumption, reducing environmental pollution and conserving the limited resources of the earth are a very important and urgent task facing people today. Driven by the general trend of lightweight products such as automobiles and 3C, traditional steel materials are gradually transformed into light alloy materials formed of aluminum alloy, magnesium alloy or zinc alloy, especially aluminum alloy, which has low density but high strength. Close to or exceed high-quality steel, good plasticity, can be processed into various profiles, with excellent electrical conductivity, thermal conductivity and corrosion resistance. Aluminum alloy can be heat treated to obtain good mechanical properties, physical properties and corrosion resistance. However, the traditional aluminum alloy casting molding is also carried out in a harsh environment, accompanied by environmental problems such as high temperature, dust, noise, and exhaust gas. Since the beginning of 2000, robots have gradually been applied in the field of aluminum alloy die-casting. Up to now, it has developed into a die-casting flexible processing unit, which realizes the use of robots in the whole die-casting process to realize the processes of spraying, feeding, and taking parts. The die casting production efficiency is high, and the casting dimensional accuracy is high.
However, with the requirements of the new high-strength, high-toughness and ultra-thin wall alloy materials, the disadvantages of the conventional die-casting parts that cannot be improved by heat treatment are also highlighted. However, gravity alloy casting of light alloy can realize various methods of casting according to the needs of product molding, and can strengthen the alloy material by heat treatment to improve product performance, which is one of the ways to gradually promote the formation of light alloy materials. The layout of the device is simple and flexible, and the investment is relatively low. At present, most light alloy gravity casting enterprises in China are still in the stage of full manual operation, but some foreign companies have formed the use of industrial robots instead of artificial gravity casting process for lower core, clearing, pouring, picking, grinding and other operations.
Application of Industrial Robot Integration Technology in Automatic Production of Light Alloy Gravity Casting
The traditional production mode of light alloy gravity casting is manual core-casting machine clamping-handle spooning aluminum liquid casting-casting machine turning product solidification-manual opening die-hand-handling-hand coding-natural cooling-manual cleaning - Transit detection. Basically, the whole process is mainly based on manual work, and the dependence on people is relatively high. Due to the frequent turnover of operators and the limitation of the physical capacity of the operators, the stability of the casting process is poor, and the quality of the cast products fluctuates.
As a subsidiary of AVIC Special Aircraft Corporation, Hubei Hangte Equipment Manufacturing Co., Ltd. is a high-tech enterprise specializing in aluminum alloy gravity tilt casting. With its rich casting experience and leading technology of domestic foundry equipment, starting from 2014 In-depth development of robotic gravity casting automation production line, has developed and implemented monorail robot, dual-track robot gravity casting automatic production line, elevated overhead rail robot casting automation production line. Among them, the monorail robot and the two-track robot gravity casting automatic production line are mainly for different categories and beat requirements, and can be flexibly arranged and adjusted on the production line. The elevated overhead rail robot casting production line is integrated and automated production of the entire casting process, suitable for large-volume products.
1. Monorail robot pouring automatic production line
Figure 1 Monorail robot casting automation line
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