Jul 26, 2017
Carbide Inserts According to the cutting movement mode
Processing of various kinds of outer surface of the tool, including turning tools, planer, milling cutter, the outer surface of the broach and rasp; hole processing tools, including drill, reaming drill, boring knife, reamer and inner surface broach; Tools, including taps, die, automatic opening and closing thread cutting, thread turning tools and thread cutter, etc .; gear processing tools, including hobs, shaper cutter, shaving cutter, bevel gear cutting tool, cutting tool, Tooth saw blades, Band saws, Bow saws, Cutters and saw blades, etc. In addition, there are combinations of tools.
According to the cutting movement and the corresponding blade shape, the tool can be divided into three categories.
General tools such as turning tools, planers, milling cutters (excluding forming turning tools, forming planers and forming cutters), boring tools, drills, reamers, reamers and saws; forming knives, With the same or near the same size of the workpiece, such as forming a knife, forming planer, forming cutter, broach, cone reamer and a variety of thread processing tools; Toothed or similar workpieces such as hobs, shaper shaper, shaving cutter, bevel gear planer and bevel gear cutter.
Tool materials are broadly classified into the following categories: high speed steel, cemented carbide, cermet, ceramic, polycrystalline cubic boron nitride and polycrystalline diamond. I mainly put on ceramics, ceramics for cutting the tool time than the carbide early, but because of its brittle, the development is very slow. But since the last century after the 1970s, or get a relatively rapid development. Ceramic tool materials are mainly two major lines, namely, alumina and silicon nitride system. Ceramics as a tool, with low cost, high hardness, high temperature performance advantages, there is a good prospect. Should be called cutting tools, the current domestic and foreign products vary widely, the tool is high-tech consumer goods!
1, what carbide?
It is a high hardness and high melting point of metal carbide as a matrix, mainly carbon as a binder, the use of powder metallurgy to form an alloy. Its hardness and wear resistance super good, high heat resistance, can cut faster than high-speed steel several times higher. In particular, his high hardness and abrasion resistance, even in the case of 500 degrees Celsius will not deformation, at 1000 degrees Celsius still has a high hardness. Now the new hardness alloy cutting tool is equal to several times the carbon steel.
2, China is the development of carbide cutting tools.
Now the cement has dominated, reaching 70 percent. However, high-speed tools are being reduced by 1-2 per cent per year. Now basically down to about 30 percent. King Kong, cubic boron nitride and other super hardness of the proportion of the tool accounted for about 3 percent. China's current annual tool sales of 14.5 billion yuan, the proportion of carbide cutting tools less than 25%, not only with the international market tool product structure is far from the domestic manufacturing industry can not meet the growing demand for carbide cutting tools. China's current annual output of about 80,000 tons of high-speed steel, accounting for about 40% of global output, consumption of a large number of precious tungsten, molybdenum and other rare resources. This blind expansion of the low level of duplication, making the production of high-speed steel tool a lot of excess, had to sell at low prices, resulting in a large number of low efficiency tool manufacturers. China's current annual output of 1.6 thousand tungsten carbide, accounting for global production of about 40%. But the highest value of carbide products cutting blade production is only 3,000 t, only 20%. This situation, on the one hand caused by the urgent need for domestic carbide cutting tool supply, on the other hand also make valuable carbide resources are not fully utilized. China's cemented carbide annual sales income of about 560 million US dollars; Japan is only 40% of China's output, but the sales income of up to 2.63 billion US dollars, the blade (tool) proportion of up to 72%, so that resources Has been fully utilized, the enterprise has also been a good benefit. China's tool industry should get some useful inspiration. At present, the tool structure imbalance on the production of tools and demand is wrong. For example: the user needs a large gap in carbide cutting tools, but high-speed steel tool is overproduction; modern manufacturing industry need to work efficiently tool gap is large, but low-grade standard tool is overproduction.