The domestic current situation of the diamond saw blade matrix technique used in stone processing

     According to the material classification, the current domestic production of diamond saw blade matrix materials mainly 50 mn2v, 75 the CRL and 65 mn three kinds of material, some low-end market is made of 45 # steel. 45 # steel is ordinary carbon steel, 65 mn is common spring steel, 75 the CRL is high carbon alloy steel. In comparison, the 50 mn2v is a kind of medium carbon alloy steel, 50 mn2v tiny grains, high thermal stability, has high tenacity, fatigue resistance and heat resistance. Saw blades matrix, 50 mn2v materials has more complex welding times, long service life, welding head saw blade is not easy to deformation, deformation after the advantages of easy to repair, products in use process and make the rigid get higher effect, thus 50 mn2v materials are widely used in processing and production of diamond saw blade matrix.

     According to specifications and classification, the domestic stone processing saw blades matrix starting specifications from ф 200 mm, maximum ф 3500 mm (the great circle of the specifications of the saw blade for abroad towel 5000 mm). Among them, the ram dp200-600 specification sheet is mainly used for semi-finished clipping (cutting edge) processing; ф 650 above specification is mainly used for tombstone, thick slab such as tomb column (column) forming cutting processing, and is used to block the saw cut in (board) material processing. At present especially in the ф 1600 mm saw blades matrix using the most common.

     ф 200 ~ 600 mm specifications saw blades matrix, due to the low technical content, the product technology and quality requirement is not high also, just request to use cutting edge, the products tend to homogeneity of the market. At present domestic ф 200 ~ 600 mm saw blades matrix manufacturer nearly hundred, market competition is mainly price competition as the main means of industry competition is intense, profit is very low, some strong domestic enterprises has no intention to get involved in this kind of low-end market competition.

     Substrate relative to the ф ф 650 mm above 200-600 - mm specifications, product processing difficulty bigger, industry into the initial capital is more, the threshold is higher. The user of the product quality and performance requirements are also higher. The current domestic manufacturers, less than 10, the product showed a certain degree of diversity, competition in the market with non-price competition as the main means, the quality of the product itself quality, stable performance, the length of life, and service quality play a key role in market competition. In southern fujian, guangdong and other regions, diamond saw blade matrix group used generally, as a kind of ф ф 940 mm l600mm 10 pieces of each type combination, 680 mm, ф ф ll40mm and ф l600mm combinations of 5 pieces of each type and so on. Combination of saw blades matrix is used to group cutting granite and marble plate, sheet greatly improves the cutting efficiency and precision, save power consumption by more than 15%, at the same time of saw blades matrix are also put forward higher quality and performance requirements.

     As the country is becoming more and more attention to environmental protection, shortage of mining waste material resources, power resources the tight supply of stone enterprises manufacturing costs, increased competition, some energy-saving, resources and environmental protection of the saw blade base more and more get the welcome of the market, customer demand for the variety of saw blades matrix appeared some new characteristics:

1. Wafer, thin slice blade matrix

     Wafer, thin slice blade matrix, mainly by the thickness of the matrix to distinguish, for ф 1600 mm matrix, normal thickness of 7.3 mm, called the wafer substrate thickness under 6.5 mm, 5.5 mm in thickness is called ultrathin section under matrix. Thin section, thin slice blade matrix cutting granite and marble plate, can significantly improve the cutting efficiency and waste material yield, lower power consumption, such as using the thickness of 4.0 mm ф 1600 mm thin substrate, can improve the cutting efficiency by more than 10%, reduce power consumption by more than 20%, improve the utilization rate of waste material by more than 16%.

     Due to the wafer, thin slice thickness thin, large diameter diamond saw blade matrix, when the heat treatment deformation is larger, and heat treatment process control of flatness and HRC is quite important. At the same time because the thickness is thinner, jump to the end, the adjustment of the stress, including detection, have caused great difficulties, in general, only by artificial school and testing is difficult to achieve good results. Domestic black tornado four unity advanced equipment imported from Germany, roller compaction, adjusting jump and plane stress, test end into an organic whole, dedicated to the production of ultra-thin saw blades matrix, and better solve the problem of the product the stress distribution and flatness of the product, the jump and rigid index.

2. The frame saw blade substrate

     The diamond frame sawing, also known as diamond saw, was developed in the 1950 s, is a kind of novel frame sawing machine. In the stone material craft in the developed countries, the diamond frame sawing frame on the processing of marble have been largely replaced sand saws, its advantage is: cutting speed, high production efficiency; The processing quality well, sawing the plank smooth level off, can save a coarse grinding process; Labor saving and steel, improve the working environment, convenient for management.

     At present, the diamond frame sawing marble saw to has been applied in our country, especially in guangdong, fujian, Shanghai development soon. It is understood that saw total capacity has reached more than 700 sets. Domestic large amounts of data demonstrate that some technical and economic indexes are part of the diamond frame sawing is superior to the sand saws. With the technological progress of domestic bit and saw blade matrix, and the diamond frame sawing can partly replacing sand saws.

     Diamond saw blade diamond frame saw cutting mechanism is through the framework of the reciprocating linear motion, to avalanche crushed waste material of the cutting tools, cutting, slide to wipe, furrows and crushing, grinding, cutting waste material. Due to the short trip and linear velocity, low water and chip removal difficult, the sawing machine, cutter and matrix are put forward very high requirements. The current situation, saw blade sawing granite framework matrix is still mainly rely on import, but domestic zool company has started to development, production, and set up a high level of professional production line, selection of steel in line with international standards, for the most part main indicators can reach standards of advanced countries such as Germany, France, Belgium, will gradually replace the imported products, and start the batch export.

3. More than 2600 mm diameter super saw blades matrix

     At present, the domestic also widespread method of shooting the behind to punch a hole mining stone block, not only the production efficiency is low and the operation is not safe, especially caused by detonation rock burst, serious damage to stone resources, produce block size rule, not even scrapped due to crack, yield is low. According to estimation, adopt the method of shooting punch a hole drilling is only 5% to 25% of the production can be processed timber. Some stone material industry in developed countries, has banned by adopting the method of explosive blasting mining stone, international industry insiders think China stone mine low productivity and serious resource waste, the main reason is the lack of corresponding diamond saw blade matrix and related mechanical equipment industrialization, a large number of mining technology, production management.

     In recent years, the domestic first developed the hollowed saw blades matrix type large piece of mine. Some mining companies, using ф 2600 mm above specifications of large piece of mine exploitation, mine resource utilization rate reached 90%. According to investigation, the current domestic use of super large saw blades matrix for stone mining waste materials, has been more and more be taken seriously and the promotion, the mine sawing machine sets rapid growth to around 800 units.

     In addition, the market demand of stone plate is more and more big, in the past mainly depends on the frame saw blade processing stone plate, but the framework of diamond saw blade is mainly suitable for cutting marble, such as soft stone, for stone cutting granite and process still needs to be circular saw blade. Stone processing enterprises to meet the requirements of domestic and foreign markets, the super large circular saw blade matrix for cutting the big board, will there is a boom in recent years.