Engineering machinery
  • Vacuum brazing small drill bit is an example, small and medium-sized drill head widely used in metallurgy, geology, coal, water conservancy, railways, military and other construction business. According to statistics in 1978, the national consumption of small and medium-sized drill bit about 10,000, and now the amount is even greater in the national economic construction has played an important role.

    Northwest Mining and Metallurgy Research Institute in 1978 began to develop vacuum brazing small drill head, in 1980 through the Ministry of Metallurgical technology identification, 80 years have an annual output of 100,000 small and medium-sized drill bit production line, the product supply hundreds of mines throughout the country. The production of the drill bit has also in Daimiao iron ore, Xiangdong tungsten ore, Nanjing Meishan Iron Mine, Hongtangshan copper, copper and other copper mine and other places conducted dozens of tests. Drilling different types of ore rock, withstood hard granite, difficult to drill the rock and hard abrasive strong block of magnetite clip skarn and other tests. ��42mm cross-shaped drill head and the same type of drill bit in Sweden in the field of drilling comparison test, the average life of more than 100m, reached the level of the Swedish drill bit, according to the survey, the service life increased by 1 to 1.5 times to the user Has brought significant economic benefits.

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