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For gun drill, it do has its own advantages, which can reduce the production cost and processing time. It can process the deep hole with one time drilling, also the guide bush has a certain help in good surface finish. When there is a strict demand of linearity or roundness, or the processed material is hard, gun drilling tool is also the first choice. Cause gun drill can get the required precision, and also it can be grinding after using a certain life, which can greatly prolong the life service of the drilling tool.
Technical equipment
For the gun drilling, there are two kinds of processing method:1. According to the using condition of the machine, apply for deep-hole drilling system to reform to a deep hole drilling machine. 2. Apply for the specialize deep hole drilling machine. For the reforming gun drilling machine, it can only process the hole diameter, which the draw ratio of drilling length and drilling hole diameter is smaller than 10 times, and only for the normal material. If want to process the more depth length or more harder material, the drilling precision would become poor. For the special design of deep hole drilling machine, it can improve the linearity and skewness of the drilling hole, and also can make sure of a good surface finish. The cooling system of the machine greatly improve the drilling efficiency and chip removing. Besides, for the gun drilling machine, it’s CNC control, which can monitor the operating procedure to avoid the the accident.
Compared with gun drilling processing, BTA deep hole drilling, which enter the coolant oil outside the drill tube, and remove the chips and coolant oil inside the drill tube. Usually it processes the hole drilling diameter, which is bigger than 16mm, because of the limitation of the drill tube.
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