Deep drilling (hole depth and aperture ratio> 10) plays a very important role in the machining area, accounting for more than 40% of the pore volume processing. With the advancement of science and technology, new high-strength, high hardness and difficult to process high-value parts of the emerging deep, deep in the processing workpiece machining accuracy and processing efficiency requirements continue to increase, making deep processing into machining key processes and processing difficulty. Traditional processing methods due to the stiffness of the process system, and cooling and lubricating the cutting discharge problems. Increasingly difficult to meet even now failed to reach the deep hole machining accuracy, efficiency, and material requirements. So at this time requires a deep hole machining support specific drilling techniques. With the rapid development of China's machinery manufacturing industry, making an already limited to a specific field of military industry, aerospace and other deep processing technology and equipment in our industry has been widely used. Left for the most commonly used two kinds of deep drilling tools: BTA single gun drill and drill pipe Special: they represent the advanced and efficient hole processing technology, one pass you can get precise machining results, processing out hole position accuracy, dimensional accuracy is good; straightness, coaxial high, and has a high surface finish and the repeatability. Can facilitate the processing of various forms of deep, deep hole for a variety of special forms, such as cross-hole, slant-hole, blind holes and flat blind hole can be a good solution. Its not only be used to process large aspect ratio of deep (up to 300 times), also be used to precision machining shallow hole, drilling a minimum aperture of up to 0.7mm. Liyang mechanical parts processing, machinery parts processing company Liyang, Liyang machinery parts factory www.wjpjx.com