Reasonable choice of deep hole drilling parameter

Reasonable choose of deep hole drilling parameter

For the internal chip removing lateral moving gun drilling machine, there are 4 basic factors, which will effect the choose of deep hole drilling parameter:

1) the size and shape of cutting chips.

2) The total power of BTA deep hole drilling machine

3) The reasonable use of the gun drilling tools

4) The requirement of hole precision and roughness

In all these factors, the most important is the shape of the cutting chips, cause when the cutting chips can’t remove from the carbide drill bit and gun drill shank, the bench gun drilling machine can’t work. Also the chosen drilling parameter should under a normal indexing gun drilling machine power. Besides,considering the incorruptibility of gun drill bits and processing hole roughness. The forming of cutting chips, except the shape of cutting chips, it largely effected by the cutting speed and fed volume. Generally speaking, when the feed volume is fixed, increase the cutting speed, the cutting chips will become bigger and soft; when fix the cutting speed, increase the feed volume, the length of chips will become shorter and the thickness of the chips will be bigger.

Below is the drilling parameter of gun drilling machine :

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