3. New technology for diamond wire saw Previous page A furniture hinge for mounting a furniture door on a furniture body member includes a hinge bracket which is attached to either the door or body member and which includes a flat flange defining an elongated interior slot having spaced teeth forming a rack. Furniture Hinge,Wooden Door Hinges,Cabinet Furniture Hinges,Glass Cabinet Door Hinge ChongQing Troya Hardware Manufacture Co., Ltd , https://www.troyahardware.com
3.1 Brazing technology
The impregnated diamond tool is a special composite material obtained by mixing diamond particles and metal powder and sintering them. The diamond particles are generally distributed in a random state in the carcass. As the tool works, the wear of the carcass continues, and a layer of diamond particles is continuously exposed and the workpiece is cut as a micro-cutting edge. Fall off, work continuously in the form of relay, cycle back and forth and consume. The distribution of diamonds with sintered beaded beads in the carcass is random, the spacing between the abrasive grains is uneven, and the carcass is mainly controlled by mechanical force, the diamond edge value is low, and the cutting efficiency is low. It is difficult to solve the problem of self-sharpness, and it is impossible to play the grinding effect of each diamond, resulting in waste of raw materials. The principle of diamond bead "brazing" is to use a solder containing active elements (such as Ti, Cr, W, etc.) to chemically react the active element with the diamond surface during brazing and form a layer of carbide. The role of layer carbide, diamond, carcass (solder), matrix can achieve a strong chemical metallurgical bond. Domestic brazing beads are mainly made of nickel-based or titanium-based brazing filler metal and then sintered under vacuum or argon atmosphere. At present, domestic enterprises mainly produce single-layer diamond brazing beads, and multi-layer diamond brazing beads have yet to be studied.
3.2 Diamond directional arrangement technology
The diamond is arranged in an orderly manner on the working lip surface of the tool. The arrangement distance between the diamond and the diamond and the arrangement law are controllable. To meet the cutting requirements of different cutting objects, we call this technology Oriented arrangement technology for diamonds. The methods for achieving the orderly arrangement of diamonds include a template method, a dispensing method, and a laser method. The latest practical method is to form the required regular arrangement of holes in the cold press forming process of the carcass. The diameter of the hole is designed according to the coarsest particle size of the diamond coating. It is automatically cold pressed by an automatic cold press and then special. The special equipment fills the diamond into the hole and then cold-presses it for hot pressing. After the diamonds are arranged in an orderly manner on the beaded working lip surface, the cutting efficiency and cutting life are greatly improved compared with the conventional beading, and the utilization rate of the diamond is also greatly improved.
3.3 Comprehensive technical application
In summary, the beading made by high-temperature brazing and diamond ordering integrated manufacturing technology has incomparable advantages compared with the impregnated sintering and electroplating beading, especially on the small-diameter beaded rope. The main advantages are: 1 high diamond exposure, the height of the ordinary beaded diamond is limited to 1/3 of the height of the abrasive, and the height of the brazed bead can reach 2/3, with up to 70% to 80%. The exposed height of the diamond greatly expands the chip space and is less prone to chip clogging and tool failure. 2The cutting efficiency is high, the cutting efficiency of the brazed bead is 4 times that of the ordinary sintered bead, and its strong chemical metallurgical combination is suitable for efficient grinding. 3 The utilization rate of diamond is high, the amount of diamond is reduced by half, the cost is reduced, and the sawing life is equivalent to conventional beading. The application of brazing technology on small-diameter beading can produce good results. If the diameter of the carcass of the sintered bead is reduced, the characteristics of the multi-layer diamond are lost, and the brazing technology can produce superior performance. Diamond beads with smaller specifications.
4 Diamond wire saw new series and new application expansion
4.1 New series of diamond wire saws
Compared with the traditional diamond series wire saw (the diameter is generally 58-512mm), represented by the application of small diameter diamond wire saw (the bead diameter is generally 55.5-57.5mm), it forms a new series of diamond wire saws, which are mainly used in Strict requirements for the size of the slit.
At the same time, the reduction of bead diameter is of great significance for the cutting of precious stones. The application of small-diameter diamond wire saws in stone processing, on the one hand, saves stone resources, on the other hand, reduces processing energy consumption, making the processing methods more environmentally friendly. In order to meet the market demand, some domestic companies have now produced a variety of beaded ropes, the smallest diameter has been able to achieve 56.0. To reduce the size of the wire saw, it is necessary to reduce the diameter of the steel wire core and the diamond bead. The diameter of the wire rope is generally only 53.5 to 53.8 mm. Due to the reduction of the cutting resistance, the small diameter diamond wire saw can be sawed by a large area (4 m2) and thickness ( 5mm) Very thin granite sheet, sawing efficiency is increased by 3 times. The cutting force and energy consumption of the small-diameter wire saw is about 20% to 30% lower than that of the 59mm wire saw, and the cutting time per square meter is reduced by about 25%. The material size deviation processed by the small diameter wire saw is also smaller than that of the large diameter diamond wire saw, so it has some special properties. At present, small diameter beading is preferably produced by hot isostatic pressing (first subjected to hot isostatic pressing after cold pressing) or by brazing diamond. Reducing the diameter of the diamond bead helps to increase productivity, reduce production costs, and has less noise, less pollution, and lower energy consumption during use.
4.2 Progress in the new application of reinforced concrete cutting wire saw
At present, the domestic reinforced concrete wire saw technology has developed to a relatively mature stage, and the scope of actual use is constantly expanding. In addition to the traditional reinforced concrete structure cutting, it also has a large-scale application in the fields of submarine cable cutting, oil pipeline cutting, large-scale steel and other metal structural parts cutting, boiler and smelting furnace transformation. For example, the submarine oil pipeline and cable pipe cutting wire saw and supporting equipment jointly developed by Harbin Engineering University and a domestic company have been applied on a small scale; the renovation projects of domestic large and medium-sized iron and steel enterprises such as Shanghai Baosteel and Guangxi Liugang have also been completed. A large number of diamond wire saws are used, which have the advantages of small slits, simple operation, environmental protection, and strong cutting ability of components, which can save a lot of transformation cost for the enterprise.
5 Conclusion
Compared with other diamond tools, the diamond wire saw is a flexible tool, which can be used not only for cutting straight plates, but also for cutting shaped plates; it is not limited by the surface shape of the object, the work site is simple, and it can be cut in a large area; the use of a diamond wire saw can be used. Improve resource utilization and reduce environmental pollution. Due to these advantages, the market size is getting larger and larger, and the application range is wider and wider. With the advancement of technology, the use of powder granulation technology and automatic cold pressing technology can greatly improve the production efficiency of diamond wire saws; adopt new technologies such as hot isostatic pressing technology, diamond directional arrangement technology, brazing technology, etc. The diamond wire saw made by the method can greatly improve the comprehensive performance of the wire saw. The large-scale use of the high-performance diamond wire saw is of great significance for improving the utilization of stone resources, reducing the cutting cost per unit area and protecting the ecological environment.