Dental Tungsten Carbide Grinding Needle

In the field of powder metallurgy manufacturing technology, grinding needles made of powder cemented carbide are widely used in mechanical drilling and dressing of jades, mechanical drilling of printed circuit boards, etc. Tungsten carbide grinding needle is a kind of cemented carbide grinding needle. Its structure is characterized by solid grinding needle, small diameter, long length, small tolerance range of length and size and high requirement of verticality.

Although tungsten carbide grinding needle has been successfully used in mechanical drilling and dressing of jade and mechanical drilling of printed circuit boards, there are few records of its application in dental restoration and grinding industry. The main reason is that the grinding needle is a solid bar, which results in the difficulty of debris removal and local temperature in the application of grinding needle in dental restoration and grinding industry. The high rise limits the application of tungsten carbide grinding needle in dental restoration and grinding industry.

However, this does not mean that the application of tungsten carbide in this field has been blocked. Researchers have designed and developed a tungsten carbide grinding needle for dental restoration and grinding. The needle handle and the middle part of the needle body are equipped with a central hole which can inject coolant from the top of the needle body and gush out from the bottom of the needle body. The cooling, lubrication and chip removal functions in dental grinding can be realized. The details are as follows:

The tungsten carbide grinding needle is welded from the needle handle and the needle body. The needle body is a grinding part, which is made of tungsten carbide alloy bars. The strength and stiffness of the grinding process can be guaranteed, and the quality and efficiency of the grinding process can be guaranteed. The needle handle is a non-grinding part. Low-cost stainless steel or other alloy metal tubes are made to reduce the manufacturing cost of tungsten carbide grinding needles. The coaxiality of the two parts is guaranteed by the matching of the handle and needle body, and the coaxiality is high. There are central holes in the middle of the needle body. Coolant can be introduced when it is used. First, the debris of the cutting head of tungsten carbide grinding needle can be discharged to prevent the self-wear of the needle head, and at the same time, the grinding efficiency can be improved. Second, the cooling of tungsten carbide grinding needle can be realized, so that the temperature rise of tungsten carbide grinding needle can be lowered, so as to ensure carbon. The strength and stiffness of tungsten carbide grinding needle ensure the quality and efficiency of processing. Tungsten carbide micro-grinding needle can be grooved directly to make contusion cutter or coated with diamond powder to improve its wear resistance.

The tungsten carbide grinding needle can be widely used in dental restoration grinding industry with high strength, good rigidity, long service life and low processing cost.

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