Belt grinding originated in the 13th century, when people have been using sandpaper sand and polishing metal or stone, etc., with the continuous development of technology and its irreplaceable in metal processing, a variety of belt grinding machine tools gradually show in the eyes of the world. The following author briefly introduces the application and development of abrasive belt grinding machine tools in metal processing.
One: the application of abrasive belt grinding machine in metal processing
Abrasive belt grinding is widely used in the grinding and polishing of various materials, and is also essential in the metal processing process. Abrasive belt grinding machine tools are mainly used in the following four aspects in metal processing:
1. Residual processing of metal workpieces
This kind of abrasive belt grinder is a heavy-duty grinding machine tool, which is mainly for the residual processing of medium and thick metal plates, and ensures the thickness and surface accuracy of the plates while eliminating the factors such as oxidation, electroplating and rust on the surface of the plates.
2. Deburring of metal cutting parts, cutting parts and stamping parts
This kind of abrasive belt grinding machine is the pursuit of smooth and burrless effect after secondary processing of the formed workpiece, which is a combination of abrasive belt grinding unit, roll brush unit, vertical disc brush unit and other processing forms. The abrasive belt grinding unit can remove sharp burrs from the surface of the workpiece, and the different roller brush units and vertical disk brush units can blunt and round the sharp edges around the workpiece and the hole, and also sweep away the oxide formed by the laser, plasma and flame cutting surface.
3. Frosted and brushed metal surface
This type of abrasive belt grinder is the pursuit of the silk effect after the metal surface processing. Some processing purposes are to draw the surface, in order to facilitate the next composite plate or painting process; Some hot rolled steel strip grinding treatment is to improve the hot rolled steel strip plate shape, eliminate plate surface defects and remove the oxide coating and other process purposes.
4. Fine grinding and polishing of metal surface
This kind of abrasive belt grinding machine is a light fine type of machine tool, mainly used to eliminate the metal surface defects (sand holes, pits, scratches, adhesives, etc.), grinding off the workpiece machining left by the knife marks and burrs, to ensure that the workpiece surface good roughness, flatness, brightness and thickness, accuracy and other requirements.
Two: The production of metal abrasive belt grinding machine
1, foreign metal belt grinding machine production overview
The production of foreign metal belt grinding machine tools is mainly concentrated in Germany, Italy, the United States, the United Kingdom, Spain, Portugal, Austria, Belgium, Australia, Japan, South Korea and other countries.
German cylindrical abrasive belt grinder
Germany has studied abrasive belt grinding since the 1950s, and various types of abrasive belt grinding machines have been produced. At present, the main product types are wide-format large abrasive belt grinding machines, narrow surface medium abrasive belt grinding machines, cylindrical abrasive belt grinding machines, and transverse abrasive belt burring machines.
The United States is the world's earlier development of abrasive belt grinder countries, as early as the 70's production scale exceeded 40,000 units, the current engaged in metal abrasive belt grinding machine companies have TIMESAVER Company, Midwest Group One company, BURRKING Company, KMG company, ACME company, CS UNITEC company.
In addition, IMEAS, COSTA, GARBOLI, SURFACE ENGINEERING, De Stefani Company, SURTECH Company of Britain, AUTOPULIT Company of Spain, NSMAQUINAS Company of Portugal, LANGZAUNER Company of Austria, VGBELGIUM Company of Belgium, RADIUSMASTER company of Australia, Kikukawa Railway Engineering Company of Japan, IST Company of South Korea and so on Is the international production of metal belt grinding machine tools well-known enterprises.
2, domestic metal belt grinding machine production overview
China's metal belt grinding machine is mainly distributed in the Yangtze River Delta, the Pearl River Delta, Qingdao, Chongqing four plates, of which the Pearl River Delta gathered a large number of small and medium-sized grinding machine production and sales enterprises, known as "small belt grinding machine production and sales base"; The Yangtze River Delta industry chain is an area with strong technical strength of abrasive belt surface grinding machines.
China's belt grinding machine production enterprises are distributed in 12 municipalities and provinces, Jiangsu, Shandong, Guangdong and Zhejiang, accounting for 82% of the total. In addition, Xinxiang, Beijing, Shenyang, Jinan, Taiyuan and other places also occupy a certain share in the production of abrasive belt grinding machines.
Three: Research and development of domestic metal abrasive belt grinding machine
The level of metal abrasive belt grinding machine in China has been significantly improved, with batches of new products entering the market, more and more enterprises have begun to increase the research and development of metal abrasive belt grinding machine. The research and development of metal abrasive belt grinding machine mainly starts from four aspects, the first is the research and development on the basis of grinding machine and lathe; Secondly, research and development on the basis of woodworking sanding machine, as well as in mapping, copying, imitation of these aspects, it is worth noting that with the development of this industry, more and more enterprises realize the importance of independent innovation, many enterprises began to develop metal sanding grinder from this aspect of independent innovation.
Metal grinding and wood sanding process is very different, only the grinding process of different metal workpiece detailed analysis and research, in order to further determine the technical parameters and structure of the abrasive belt grinder, Such as heat dissipation, rust prevention of wet processing, thin plate grinding with a thickness of less than 0.3mm, processing of short workpieces with a length of less than 100mm, grinding fluid filtration of wet processing, sand belt selection of different grinding workpieces, feed drive of medium and thick plates with large mass are different from wood processing.
Four: Thinking about the application of metal abrasive belt grinding machine in China
There are four main reasons for the backward application of metal abrasive belt grinding machine in China: First, most enterprises do not understand the metal surface treatment of abrasive belt grinding process; Second, the abrasive belt grinding machine manufacturing enterprises lack of in-depth research on the abrasive belt grinding process in different industries of metal surface processing; Third, the domestic abrasive belt grinding machine started late, there is no experience accumulation, lack of quality, and imperfect supporting equipment; Fourth, the state and relevant enterprise associations should increase efforts in personnel training, standards, and promotion of abrasive belt grinding machines.
Living in the current situation of metal abrasive belt grinding machine in our country, it needs to be improved from the following three aspects: First of all, the use of coated abrading tools, coated abrading tools, abrasive belt grinding machine, abrasive belt grinding machine application is an inseparable unity, enterprises in the selection process, to consider the removal of residual sand belt selection, grinding and polishing sand belt selection, removal of burr sand belt selection and many other options; Secondly, it is necessary to standardize the manufacturing process of the abrasive belt grinder, consider the modularization, generalization, serialization, standardization of the product, and make efforts in environmental protection and energy saving, and it is necessary to improve the appearance, operation comfort, safety and other aspects of the product; Then the sales of coated abrades and abrasive belt grinders should also be improved. We can increase network publicity and participate in machine tool industry exhibitions to promote the overall sales and integration services of abrasive belt grinders and other machine tools, as well as the sales integration of coated abrades and abrasive belt grinders. And gradually establish offices in various countries and regions, or seek intermediary agents and other means to increase product sales.
