Patent

What is deburring?

2018-07-03

Deburring is the removal of the thorns or flashes formed at the intersection of the part face and the face. The hazards of burrs are particularly obvious, which has gradually attracted people's attention, and began to study the formation mechanism and removal methods of burrs.


Some of the burrs on the mechanical parts are caused by plastic deformation during the cutting process; some are the flashing edges of the casting, die forging, etc., and some are the residual materials for the welding extrusion. With the improvement of industrialization and automation, in the field of machining, especially in the fields of aviation, aerospace and instrumentation, the improvement of the precision requirements of mechanical parts manufacturing and the miniaturization of mechanism design, the burr is particularly obvious, and gradually attracts people. It is generally taken seriously, and research on the formation mechanism and removal method of burrs has begun. In 1953, many manufacturers in Japan began to develop special automatic deburring machines for large and medium-sized castings such as automobile brake drums, cylinder blocks and gearbox bodies. Due to the poor adaptability of the deburring machine to the parts and the high price, it has not been widely promoted and applied, but it laid a good foundation for the deburring technology of the castings that were later developed. In terms of theoretical research, Professor Oshima of Kyoto University in Japan published a paper on “Glitching in the Cutting Process” in 1958, and discussed the phenomenon of burrs and the classification of burrs. In 1959, a professor at the Utsunomiya University Department of the Department published a paper entitled "Discussion on the use of vibration cutting to reduce burrs". In 1967, Professor Qian Man of Jinggang University published the article “Research on the Burr of Aluminum Alloy Plate Drilling”. In the same year, R. William of the United States proposed mixing abrasives with silicone resin as a medium, pressing into the mold containing the parts, and removing the burrs on the inner surface of the parts and the holes (ie, squeezing and burring techniques). With initial success, the technology has become a US patent. In 1971, the Japan Integrated Casting Center, under the guidance of Professor Kou Xia of the Vocational Training University, developed a numerically controlled belt grinding device that can remove burrs from castings of any shape. In December of the same year, the Japan Abrasive Processing Research Society held a “Deburring Technology Lecture”, where papers on abrasive burrs, abrasive cloth, ultrasonic, chemical, and electrolysis were used to remove burrs. In 1972, the casting deburring machine developed by Koyama Co., Ltd. and the automatic deburring device for the cylinder block of Komatsu, Japan were awarded the Japan Automation Machinery Award. Gao Xiaoyu, from the Shiba Electric Manufacturing Technology Research Institute in Tokyo, Japan, conducted deburring principles, burr size, position, shape of deburring parts, automation difficulty, operating equipment costs, and features of more than 20 major deburring methods. In-depth research and discussion. In 1973, the University of Didi, Gresicle, completed a paper entitled “The Formation and Properties of Burrs in Mechanical Machining”, analyzed the formation principle of burrs during machining, and discussed the observation of burrs during the experiment. . The United States attaches great importance to the deburring technology of mechanical parts because of the rapid development of the US machinery manufacturing industry, high output, large batch size, high quality requirements, and the use of manual deburring can not meet the needs of production development. In 1974, the American Society of Manufacturing Engineering first set up a burr technology branch to begin research on deburring technology. This is the beginning of the formal entry of the glitch problem. Around 1976, Japan had more than 300 patents on deburring technology, and about 90 patents on deburring technology for plastic workpieces. In the meantime, Japanese technicians have carried out a lot of research and experiments on the causes and preventive measures of burrs, and made some progress. The research and application of vibrating finishing deburring machine (also known as vibrating roller mill) is obtained in the world. Praise. Since 1984, Prof. Nakayama Yoshio of the University of Yokohama, Japan has made a comprehensive and systematic definition of the cutting burrs based on the cutting direction of the most basic elements in cutting and the cutting edge of the cutting tool. The workpieces have been machined in turning and planing. The physical properties, workpiece shape, tool geometry and other factors have a lot of experimental research and theoretical analysis on the influence of cutting burrs, which laid a theoretical foundation for effectively suppressing and reducing the occurrence of burrs. China's former Ministry of Machinery hydraulic industry listed deburring technology as the main research project to improve the quality of hydraulic products during the "Seventh Five-Year Plan" period.


In the 21st century, deburring technology has received more and more attention from industrialized countries. With the acceleration of industrialization in China, the application of parts deburring technology is becoming more and more extensive, and the technology is more sophisticated. More and more departments are paying attention to parts deburring. Research and application of technology, and has achieved fruitful research results.


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