Based on the complex shape of carbide ball milling cutter, it is difficult to prepare by traditional machining method, and the waste of materials will be caused. Preparation of Harbin university of science and technology to the preparation of the micro texture of carbide end milling ball head can get higher dimensional accuracy, but also create unique blade on the knife before - contact model, can be achieved on the contact area to print out from 50 microns to 200 microns in diameter pit micro texture arrays, and dimension precision is very high.

With the formation of tungsten carbide balls head on compared to the method of texture, Harbin university of technology in addition to being able to create complex shapes of ball end milling cutter, also can in front of the ball head milling cutter blade knife - crumbs contact region more precise pits were dimension micro texture arrays, which can achieve cut the knife when cutting chip - crumbs contact area, to reduce the knife - friction coefficient of contact area, to reduce tool wear.

Ball tooth bit is a kind of rock drill bit which appears with the development of hydraulic rock drill. It has high working efficiency, fast drilling speed and saves auxiliary working time. It is suitable for fast driving of high-power rock drill. Ball tooth drill bit in the drilling of brittle rock, with the use of high power hydraulic drill, the biggest characteristic is fast and stable chisel, drill bit grinding cycle is long. Since the 1970s, porter company has been researching and developing ball-tooth bit as its main product. Now, the sales volume of various ball-tooth bit accounts for 60% ~ 70% of the total production of the ball-tooth bit. In 1968, after adopting the precision hot-setting technology, sandvik company developed a series of ball-tooth drill bits with large and small diameter for percussion drilling, and recommended the ball-tooth drill head as the "ideal supporting drilling tool for hydraulic rock drill". In the next few years, ball tooth bit will take more and more proportion in rock drilling bit market.

After the 1980s, China began to pay attention to the research and development of ball tooth bit. In the 1990s, the quantity and quality of domestic ball-tooth drill bits have been greatly developed (table 5), and the export volume is also increasing year by year. A batch of ball tooth bit manufacturers with larger output and better quality appeared, tungsten carbide ball tooth bit produced by lianhuashan takes a large proportion in the export bit.In the production process of ball tooth bit, high quality carbides of shell steel, high precision processing equipment, reasonable processing technology and heat treatment technology are the preconditions to ensure product quality. The ball tooth bit steel used in foreign brazing tool factory mainly USES chrome-nickel-molybdenum steel or silicon-manganese chrome-nickel-molybdenum steel. In the hard alloy aspect, each factory selects the high quality hard alloy, like Sweden DP series alloy, Germany GT series alloy and so on.

for more details: wococarbide.com

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