BTA Deep Hole Drilling And Gun Drilling Combined Machine

Advantage of the BTA and gundrilling combined machine:

The machine adopts single spindle structure,Gundrilling and BTA drilling share one set spindle,it is suitable for processing the coaxial hole on shaft type parts ; When exchange the Gundrilling and BTA drilling method, the cutting tool , auxiliary toolings, oil passage should be changed by manual , to realize the exchange of both processing methods .

 

During processing , the cutting tool and workpeice roate in opposite directions , cutting tool feed .

 

Workpiece clamping:

The cone discs are installed in front end of both headstock spindle and guide frame spindle, the hydraulic system control the axial movement of headstock spindle , use the cone disc and chamfer on both ends of workpiece , to clamp and position the workpiece manually.

 

 

The machine adopts linear guide rail .

 

CNC control system : SIEMENS

 

Drill box :

The servo main motor drives the spindle to rotate through synchronous belt and pulley , rotary speed stepless , Main spindle max. Rotary speed is 3000r/min. ; The spindle drive is front-installed to protect the main motor , and convenient to change the cutting tool .The gundrilling and BTA drilling processing methods share one set spindle .

Headstock

Drive the workpiece to rotate, constant rotary speed 30r/min; The spindle could move axially under control of hydraulic system to tighten and loosen the workpiece . The spindle drive is front-installed, it is convenient to loading/unloading workpiece and could protect the main motor .

The headstock can move on the working table manually, locked on the working table manually after move to the right position .

Cutting tool feeding system

Adopt servo motor driving ball screw structure , the cutting tools feeding rate could realize stepless .

 

Drill bar support rest : 2 sets

Drill bar support rest and drill box are linked ; Along the movement of drill box, the distance between drill bar support rests is adjusted automatically .

 

Coolant system :

Mainly composed of chain plate chips conveyor, paper filter, One set variable frequency high pressure pump group, One set quantitative high pressure pump group, oil chiller , filter device and so on .The flow adjustment panel of coolant system is installed on the CNC system operation station .

 

Workpiece carrier

Used for workpiece pre-positioning . Separate with the workpiece during processing .

 

The machine bed , box body etc. basic parts are precisely cast by super casting iron, processed by twice aging treatment . The machine bed is designed with helical oil returning slot , so that oil could return to the oil tank very soon .

Guide frame :

Used for guiding cutting tool , discharging cutting chips and supporting the drill bar . Its front end install guide sleeve to guide the cutting tool , rear end install drill bar support sleeve to support the drill bar .

Shared by Gundrilling and BTA drilling ; Under gundrilling processing mode, the guide frame is used to discharge the cutting chips; Under BTA drilling processing mode ,the guide frame supply oil for the cutting tool ;The guide frame is fixed on the machine bed .

 

The machine is equipped with T-working table ; There is oil return slot around the machine bed, the oil proof plate is installed on the oil returning slot.

 

Machine main technical parameters:

Specification			Parameter		Remark
			1000mm	1500mm
Working Capacity	Drilling diameter range	Gundrilling	Φ5~Φ25mm		/
		BTA	Φ25~Φ50mm		/
	Max. Workpiece length		1000mm	1500mm	/
	Max. Processing depth		1000mm	1500mm	/
	Workpiece OD range		Φ15~Φ100mm		/
	Spindle quantity		1		/
Machine Performance	Z axis	Feeding speed range	5~500mm/min		/
		Rapid move speed	3000mm/min		/
		Motor torque	15Nm		/
	Drill box	Max. rotary speed	3000r/min		Stepless
		Motor power	22KW		Servo main motor
	Headstock	Rotary speed	30r/min		Fixed
		Motor power	3.7KW		Normal motor
Coolant system	Max. Pressure	Gundrilling	8MPa		Adjustable
		BTA	4MPa		Adjustable
	Max. Flow		200L/min		Adjustable
Others	Filtering accuracy		20μm		/
	Machine general power(about)		58kw		/
	Machine total weight(about)		15T	16T	/
	Machine floor size		6mx3m	7mx3m	/

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