TECHNICAL SPECIFICATIONS
Gun drilling and BTA Combined drilling machine (Model: ZK2108Fx2×2500mm )

Machine Operation: BTA Method (Internal chip removal ) , Gun drilling method (External chip removal). These two processing method cannot be used at the same time.
 

Machine Specifications:

Machine brief:
 

1. The machine adopts horizontal layout, using gun drill (External chip removal) and BTA (Internal chip removal) two processing methods, the two processing methods can not be used at the same time. For example, when using gun drill, BTA can not be used; workpiece is clamped on the machine by chuck and cone disc;cutter tool and workpiece rotate relatively, and cutter tool feed.

When the gun drill and BTA are converted, it is necessary to change the cutter, auxiliary tools and oil circuit manually, so that the conversion of the two processing modes can be realized.

The machine adopts double spindle structure. The gun drilling drill box and BTA drill box are assembled on one bracket and share one infeed system.

1. Machine features:

1. It has two processing methods: gun drill (external chip removal) and BTA (internal chipremoval). Double spindle structure, one spindle for gun drilling, the other spindle for BTAprocessing.
2. Bed body, box body, worktable and other basic parts are cast with high quality cast iron.
3. Equipped with special cooling system: composed of automatic chip conveyor, oil cooler, filtersystem, high-pressure pump group, etc.
4. Z-axis feeding guide is double rectangular sliding guide with good rigidity.
5. The spindle motor is used to drive the cutter tool rotation, and the feed of the tool is realized by the ball screw driven by the servo motor. Stepless speed regulation can be realized by rotating and feeding thecutter.
6. Electrical system: it was controlled by CNC system, which can not only program and set up the automatic processing cycle, but also can adjust manually, point, start and close.
7. The machine has the functions of pressure protection, liquid level and temperature protection of cooling system, tool protection and stroke protection.

   Machine mainly Parameters:

   Specification			Parameters	Note
   Working capacity	Drilling diameter range	Gun drilling	Φ4~Φ30mm
   		BTA	Φ25~Φ80mm
   	Max.drilling depth		2500mm
   	Max.workpiece length		2500mm
   	Workpiece OD range		Φ50~Φ200mm
   Machine	Drill box for Gun	Max.rotary speed	10000r/min	Stepless

   performance	drilling	Main motor power	7.5KW	Spindle motor
   	Drill box for BTA	Max.rotary speed	2000r/min	Stepless
   		Main motor power	30KW	Spindle motor
   	Z axis	Infeed speed range	5~500mm/min	Stepless
   		Rapid traverse rate	2000mm/min
   		Motor torque	23Nm
   	Others	Max.hole-Length ratio	100:1
   		Machine total powe(r  roughly)	70kW
   		Machine floor space(roughly)	9m(L)×3.4m(W)
   		Machine total weight(roughly)	15T
   CNC system	GSK
   Cooling system	Max.Pressure	Gun drilling	10MPa
   		BTA	5 MPa
   	Max.flow	Gun drilling	100L/min
   		BTA	300 L/min
   	Filtering accuracy		40μm