Big Spindle Bore Hole Type Deep Hole Drilling Machine(Spindle Go Through Type)

Machine processing and chip removal method:

Method 1: Workpiece and cutter tool rotated relatively and the cutter tool is infeed.

Method 2: Workpiece rotate and cutter tool is fixed and infeed .

Boring:Oil pressure head supply oil, cutting chips is discharged forward through the inner hole of the workpiece.

Drilling:Oil pressure head supply oil, cutting chips is discharged backward through the inner hole of the drilling bar.

 

Machine overall layout and the structure of the main components:

Machine main parts: Machine bed, spindle box, one set ring swivel ,center rest, roller , Oil pressure head,Drill box, Drill bar support rest, Feeding system, Coolant system, Siemens 828D CNC system and so on.

Machine overall layout and main parts:

 

 

Machine bed:

Machine bed section

High strength machine bed,total width of machine bed is 960mm,two guide rail total width is 800mm,single guide rail width is 180mm. Our machine bed design could guarantee the stability of the machine during working, The machine bed guide rail is a rectangular guide rail, which has been quenched and has high wear resistance; the machine bed adopts a split structure, assembled together with high-strength bolts, and is positioned with tapered pins.

Inside the machine bed near the front guide rail, a high-precision helical rack (single rack structure) is installed for the drill box feed, rapid movement (Z1 axis) , oil pressure head movement and tightening (Z2 axis).

The outer side of the guide rail is equipped with protection, and the leak-proof performance is excellent.

 

Headstock:

The headstock is located in the middle of the machine bed and is used to drive the parts to rotate. The right side of the headstock is a carriage bed, which is used for the drill box feed, rapid movement (Z1 axis), oil pressure head movement and tightening(Z2 axis); the left side of the headstock is the workpiece bed, which is installed on it there is a center frame for workpiece support, the penetrating main

spindle center rest and the movable chip conveyor to adapt to workpieces of different lengths.

The transmission gear of the headstock is precision ground; the tooth surface of the gear is high-frequency quenched, so that the gear has high hardness, high strength, high wear resistance and high fatigue limit, and can withstand relatively large alternating loads and impact loads .

In order to improve the life of gears and bearings, the headstock is lubricated with lubricating oil circulating.

 

Chuck

Both ends of the headstock are equipped with chucks, and the double chucks are used to clamp the workpiece.

 

Ring center rest:

The machine is equipped with a ring center frame, which serves as the foundation for the workpiece during the machining process. The spindle of the ring center frame coincides with the spindle of the machine spindle, and chucks are installed on both sides.

The movement of the ring center frame is driven by an ordinary motor, such as a worm gear, gear assembly, etc., to rotate the gear shaft and make it move in a straight line along the rack, thus achieving a constant speed movement of the ring center frame.

 

Center Rest:

The center frame is setting and used according to the length or shape of the workpiece. The center frame is a three point closed center frame structure, with two rollers below and one roller above. It is moved by a screw to adapt to the usage requirements of different workpiece diameters

 

Oil pressure head:

The oil pressure head is the main part of the machine. It is used for cutting tool guidance, cutting oil supply, supporting drill bars, and tightening workpieces. At the head of the oil pressure head, there is a cone disk, which is used to support and tighten the workpiece. It is combined with the workpiece at a cone angle of 60°. The taper is customized according to the needs of the workpiece. The oil pressure head can be moved to adapt to the processing of workpiece with different lengths.

The moving and tightening workpiece of the oil pressure head are realized by the servo motor, which is decelerated by the turbine shaft, and then drives the gear to rotate along the rack. The servo motor has a constant torque output, and the tightening force is adjustable.(This type servo clamping system is much stable than the hydraulic clamping system)

 

Drill box:

The drill box is fixed on the feed carriage for driving the tool to rotate and feed. The motor for the drill box drives the main shaft to rotate through a belt and a gear box. Main spindle hole is 600mm,the spindle is made of integral forge alloy steel.The front end of the spindle is equipped with a drill rod clamping sleeve for clamping the drill bar.

The transmission gear of the drill box is precisely ground. The tooth surface of the gear is subjected to high-frequency quenching treatment, so that the gear has high hardness, high strength, high wear resistance and high fatigue limit, and can withstand relatively large alternating loads and impact loads.

In order to improve the life of gears and bearings, lubricating oil is used for circulating lubrication.

Infeed carriage:

The drill box is fixed on the infeed carriage. The Motor system of the feed carriage is composed of servo motor, precision planetary reducer, gear, anti backlash double gear shaft, etc. The motor drives the gear shaft to rotate through the reducer, gear, etc. to make it move along the rack in a straight line, thus realizing the rapid movement and feed movement of the feed carriage. The feed transmission system adopts a double gear shaft clearance elimination structure design to improve the accuracy of feed motion.

 

Drill bar support rest:

The drill bar support rest is used to support the drill bar; it adopts a high-rigidity monolithic structure with a support sleeve mounted on it, which can absorb the impact and jitter generated during the processing.

Coolant system;

The main function of the coolant system is to use the circulating liquid medium to lubricate and cool the cutting area while removing chips. The coolant system is mainly composed of a cooling pump, oil tank, chip receiving box, filter device, etc., to provide sufficient cutting oil for deep hole processing. The coolant system is an oil supply system composed of a motor pump, and the required flow can be obtained by adjusting the motor speed.

 

Control system: Siemens 828D CNC system

Independent electrical cabinet with excellent dust prevention effect. The cabinet is equipped with air conditionor, which allows electrical components to work in a suitable temperature environment, thereby improving the service life of the components and ensuring the stability and reliability of the control system. The numerical control system is Siemens 828D CNC control system.

 

Processing accuracy:

Drilling: Surface roughness: Ra3.2-12.5um (Related to the workpiece material)

Boring: Surface roughness: Ra1.6-6.3um (Related to the workpiece material)

Hole accuracy: IT8-9

Mainly parameters of the machine:

Specification			Parameters	Note
Working capacity	Center height(height from spindle center to guide rail surface)		625mm	-
	Drilling diameter range		Φ30~Φ100mm	-
	Boring diameter range		Φ30-400mm	-
	Max. Boring depth		9000mm	-
	Workpiece OD range		Φ80~Φ550mm	-
	Spindle bore hole diameter		600mm
	Max. Workpiece length		9000mm	-
Machine performance	Z1 axis (Drill box feeding)	Infeeding speed range	5～3000 mm/min	-
		Rapid speed	3000 mm/min	-
		Servo motor rated power	7.5kW	SIEMENS
	Z2 axis (Oil pressure head movement)	Rapid speed	2000 mm/min	-
		Servo motor rated torque	5.2kW	SIEMENS
	Drill box	Rotary speed range	50～800 r/min	Manual 3-gears, Stepless
		Motor power	55kW	Spindle motor
	Headstock	Rotary speed range	20～350 r/min	Manual 2-gears, Stepless
		Motor power	55kW	Spindle motor
	Ring center rest	Clamping diameter range	80-550mm
		Workpiece length range	3000-9000mm
	Others	Machine total power	About 170kW
		Machine loading capacity	20T
		Machine weight (about)	80T
Coolant system		Max.pressure	2.5MPa
		Cooling pump motor	11kw,15kw (2 groups )
		Max. flow	800 L/min
		Oil tank volume	10000L

Hot Tags: big spindle bore hole type deep hole drilling machine(spindle go through type), China, suppliers, manufacturers, factory, customized, price, cheap, company, cost, for sale