Machine application:
​ . Machine is mainly used in boiler industry tube drilling by using high speed carbide drill, also can use special high speed steel drill cutter machining welding groove.
​ . No need of manual lineation, greatly improves positioning accuracy and drilling efficiency, realizes drilling automation.
​ . Machine is gantry movable flexible CNC drilling machine, suitable for mass production.
​ Machine features:
​ 1. Adopts precision spindle to realize high efficiency drilling and processing welding groove;
​ 2. CAD/CAM direct conversion, automation and high precision processing, support ERP system;
​ 3. Double gantries double stations structure, two short tubes can be processed at the same time, long tube can be processing with double gantries.
​ 4. Independent drive of each gantry, gantry numbers can be designed by customer’s requirement; Each gantry can be used as an independent processing unit, process different workpieces at the same time, also can online process the same workpiece simultaneously.
​ 5. Tube supporting bracket, lifting supporting bracket and fixed supporting bracket 2 types, lifting supporting bracket lifts workpiece when rotates, and lower to fixed supporting bracket to prevent workpiece from slipping.
​ 6. CNC dividing head, each is installed on both sides of machine bed, can set X axis movable, equip with self centering chuck, convenient for workpiece clamping.
​ 7. Adopts famous brand imported spindles, with super large torque output capacity, spindles adopt synchronous pulley type.
​ 8. Electrical system, machine adopts Germany SIEMENS 840D or 2 sets of 808D CNC system, with RS232 interface and LCD, CAD/CAM coordinate conversion can be achieved directly, with preview and review functions before drilling, very easy operation.

Parameter list:

Name	Item	Values
Workpiece parameter	Workpiece diameter range	Φ75mm-Φ1100mm (by customer requirement)
	Max.length	12m/double-station, 25m/single-station  (by customer requirement)
	Drilling diameter range	Φ10-Φ80mm
	Workpiece material	Carbon Steel、Low alloy steel、P91、P92 and stainless steel
	Min. hole distance	20mm (From hole edge to workpiece end face)
Drilling Head	Quantity	2 pieces
	Spindle taper	BT50
	Max.drilling diameter	Φ80mm
	Max.diameter of trepan boring	Φ280mm
	Drilling depth	≤200
	Spindle rotation speed	30—3000r/min
	Spindle motor power	37kW
Gantry longitudinal movement（X axis）	Max.distance (spindle center)	27m (by customer requirement)
	X axis moving speed	0-10m/min
	X axis servo motor power	2X5.2kW
Drilling Head (Z axis)	Z axis stroke	500mm/800mm/1000mm
	Z axis feeding speed	0-5m/min
	Z axis servo motor power	2X5.2kW
CNC dividing head A axis	Indexing rotary speed (CNC)	0-5r/min
	CNC dividing motor power	3kW/5kW/10kW
Positioning accuracy	X axis	0.15mm/total length
	Z axis	0.08mm/total length
Repeat positioning accuracy	X axis	0.08mm
	Z axis	0.04mm
Hydraulic System	Hydraulic pump press	6MPa
	Hydraulic pump motor power	3kW
Pneumatic system	Compressed air supply pressure	≥0.5MPa
Chip Removal and cooling	Type of chip conveyor	Plate chain type
	Chip-conveyor quantity	2 piece
	Chip Removal speed	1m/min
	Chip-conveyor motor power	0.75kW
	Inner cooling	High-pressure water cooling
	External cooling	Water cooling
Automatic lubrication system	Lubrication pressure	2MPa
	Lubricate point injection flow	0.1mL
	Lubrication period	6-10min
Electrical System	CNC system	SIEMENS 808D (dual system)/  SIEMENS 828D (system)
	CNC axis	8+2 Spindle
Total motor power		About 120kW
Overall dimension	LxWxH	About 32X4.5X4.5m
Machine weight	About 120t