CNC Deep Hole Drilling Machine

CNC deep hole drilling machine

This machine is specially used for processing the cylindrical workpiece with deep hole , the machine bed is with good rigidity and accuracy retention . The machine is equipped with 2 set adjustable roller center rest and V-shaped workpiece carrier, so it is suitable for processing the inner hole of large workpiece as well. The spindle has wide rotary speed range, feeding system is driven by AC servo motor , so the machine could meet the requirements for various deep hole processing methods . The oil pressure head clamping and workpiece tightening adopt servo tightening method .

Product detail Description: 

Machine bed :

The machine adopt double rectangular guide rail with width 800mm;  Machine bed is cast by super casting iron HT300; Process by time aging treatment ; The surface of guide rail is machined by medium frequency quenching for 2-3mm, hardness HRC45-50, so the guide rail is with high accuracy and good abrasion resistance ; Precision rack is mounted in inner side of machine bed , used for cutting tool feeding and carriage rapid movement . 

The V-shaped slant reinforcement are distributed inside of the machine bed , Supporting strength is high, and it is not easy to deform; The outer wall of machine bed support the guide rail directly, so the guide rail could bear large cutting force, with good rigidity, not easy to deform and vibrate during machining, it is good for improving the processing quality and working efficiency of machine .

Headsotck and chuck :

The headstock adopt 21-gears manual shift , speed range 3.15-315r/min; The box body is cast by super casting iron, through time aging treatment; All the gears adopt super medium carbon steel or low carbon alloy steel , quenching hardness around HRC48 , the tooth are ground to improve the machining accuracy and abrasion resistance; A button station is set on the front of the headstock, which can realize the control of the spindle positive jog and stopping ; The headstock is fixed on the left end of machine bed and the main motor is fixed on the machine bed, with good transmission rigidity and vibration resistance.

Squirrel-cage chuck body is mainly fixed in front end of spindle ,Φ630mm three-jaw chuck is mounted on it .

The main motor connects with the headstock directly through safety coupling , prevent the spindle lost rotation during process .

Drill box :

The drill box adopts 12-gears speed change, speed range 60~1000r/min; All the gears adopt super medium carbon steel or low carbon alloy steel , quenching hardness around HRC48 , the tooth are ground to improve the machining accuracy and abrasion resistance .

The drill box has rotation and fix two structure , drill box could be locked to prevent the drill box rotating.

Oil pressure head :

Used for guiding the cutting tool, supplying cutting oil and supporting the drilling bar ; Servo motor drives its axial movement to adapt the workpiece with different length, and to tighten and loosen the workpiece .

Servo motor is used to drive the oil pressure head to tighten or loosen the workpiece, with high precision and rigidity;the whole oil pressure head adopts box structure, with high precision and rigidity.

Boring bar support rest :

   Support the drilling bar , control the moving direction of drilling bar. Equipped with locking nylon sleeve to absorb the vibration of boring bar .

Machine Main Technical Data: 

Processing accuracy :

Drilling hole :

Hole size accuracy IT9-11 , Surface roughness : Ra6.3~Ra12.5μm .

Drilling hole deviation: 0.5mm/1000mm .

Boring hole :

Hole size accuracy IT8-9 , Surface roughness : Ra3.2μm .

Hole straightness : Less than 0.15mm/1000mm .

More machine photos for reference:

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