Development Of Diamond Sawing Tools

The application history of diamond circular saw blades has been quite long. The world's first diamond-encrusted circular saw blade has a diameter of 2m. It was manufactured by the Frenchman Jaeguin in 1885. It is made of 0.8 carat rough diamonds. , inlaid by hand on the periphery of the substrate with dovetail grooves, and then fixed firmly with rivets. This method of making saw blades has been around for almost 40 years. After 1930, due to the gradual maturity of the powder metallurgy method, people gradually used metal powder metallurgy to manufacture fan-shaped saw teeth, and then welded the saw teeth to the steel substrate by welding. This is the well-known welded circular saw blade. Early product form.

 

In the 1960s, the manufacturing technology of circular saw blades developed rapidly. Circular saw blades suitable for various cutting objects, various types of binders, and various cutting methods have come out one after another, and various manufacturing methods of saw blades have also been perfected day by day, and saw blade products in many countries have formed complete products series for the market. The more well-known manufacturers include Boulter Company in Belgium, Blanton Company in Italy, Norton Company in the United States, Unicom Company in the United Kingdom, Osaka Industry Company in Japan, and Winter Company in Germany.

my country's diamond sawing tools have different starting times according to their types, such as the electroplated inner circular cutting saw blade (for cutting silicon, germanium, crystal, etc.) Cutting); in the late 1960s and early 1970s, the inlaid saw blade was successfully developed (for optical glass and geological core cutting); in the early 1970s, the welded circular saw blade was successfully developed, and it was mainly used for cutting insulating materials and electric porcelain at first. It was later extended to circular saw blades for stone cutting. After 1978, my country's stone industry has achieved comprehensive development, so that the diamond circular saw blades used for stone cutting have been serialized and standardized. At the same time, diamond saw blades and gang saws (also known as frame saws, band saws) ), new varieties such as band saws and wire saws. In the 1980s, with the development of my country's computer industry, various ultra-thin diamond saw blades (toothless saws) for cutting magnetic heads were successful. The thinnest thickness is only 0. 04mm, and its binder is not limited to sintered metal. And electroplated metal bond, and there is a resin bond saw blade.

 

my country has extremely rich stone resources and complete varieties of designs and colors. Efforts to promote the diamondization of stone processing is one of the short-term goals of accelerating the development of my country's stone industry. As we all know, diamond has high hardness, wear resistance and strength, so diamond processing tools

There are significant economic benefits.

 

With the acceleration of my country's economic construction and the process of reform and opening up, my country has become a large stone production country. According to statistics, the output of stone has reached more than 11 million tons, and the consumption of stone has reached 80 million square meters. It has become the second largest country in stone production and export after Italy. Since the 1980s, my country has successively imported more than 400 sets of stone processing production lines from Italy, Japan, Germany and other countries. On the basis of imported equipment, it has carried out digestion, absorption and innovation, and developed its own stone processing equipment industry, making the output value of my country's stone industry reach more than 20 billion yuan, the number of employees has reached 2 million, and the production capacity of marble and granite plates has reached 1 More than 100 million square meters.

 

In order to change the situation that my country's stone industry is large but not strong, and enhance the competitiveness of stone exports, in addition to the stone industry's own efforts, the diamond industry is also responsible for undertaking the development of various diamond products for stone processing, especially sawing tools. In a nutshell, there are mainly the following products:

 

(1) With the development of special-shaped stone products such as stone mosaic and cylindrical arc panels, my country's special-shaped stone processing machinery has also been developed, such as circular saws, beaded wire saws, band saws and water cutting machine tools. must be equipped with diamond tools. In particular, most diamond beaded wires are currently imported. From the perspective of development trends, the multi-rope (10 pieces) diamond beaded wire saw machine is likely to become the future large panel saw to replace the large sand saw. Therefore, it is one of the important tasks in front of the superhard material industry to vigorously develop the supporting diamond tools for processing special-shaped stones such as diamond beaded wire saws.

 

(2) Redevelopment of diamond gang saw. With the improvement of the mining technology level and the large-scale requirements of buildings for decorative panels, the amount of diamond gang saws used in the production of marble slabs will continue to increase, and the quality requirements will also increase. To this end, efforts must be made

The redevelopment of the diamond gang saw works on stable quality.

 

(3) Multi-blade combined circular saw is a weak link in the superhard material industry. Although a few manufacturers can provide it, the quality is not stable enough and the output is also small. Therefore, a series of formulas and process regulations for special multi-blade combined circular saws should be developed to improve the quality of the substrate.

 

(4) Other related diamond tools, such as polishing tools, grinding roller series products for leveling natural and artificial stone slabs, etc.

 

Judging from the development in recent years, the use objects and fields of diamond sawing tools are constantly expanding. In addition to the traditional cutting of various hard and brittle non-metallic materials such as stone, glass, and semiconductors, they are also widely used in reinforced concrete cutting ( Including the cutting of cement prefabricated parts, floor slabs, wall panels), airport runway anti-skid joints, road and square expansion joints (anti-thermal expansion and contraction), cutting of organic materials such as bakelite boards, plastic boards, and even wood, aluminum boards, steel cables, The cutting of gypsum cement board has also made some progress.

 

At present, the diameter of the largest circular saw blade in the world has reached more than 5m, but the use shows that the cutting of this large-diameter saw blade is not economical. Experts generally believe that the diameter of the circular saw blade reaches 3m.

 

The diameters of circular saw blades commonly used in China are Ф2200mm, Ф1800mm, and Ф1600mm, while Ф1200mm and Ф1000mm are ideal for combination saws. Depends on equipment and plate requirements, generally 4. 2-4. 5m is ideal. 7m。 Diamond band saw the longest unfolded length of 9. 7m. Depending on the application, the length of the wire saw varies greatly. The length of the wire saw for mining is usually about 30-50m, and the length of the wire saw for cutting special-shaped stone is mostly between 10-20m.