Deep Hole Drilling And Boring Machine in The Oil Industry

CNC Deep hole drilling and boring Machine

Machine tool machining scope

Drilling range: Φ 50~ Φ 220 mm

Push boring range: Φ 50~ Φ 250mm

Boring range: Φ 50~ Φ 250mm

Maximum machining depth: 14m

Maximum workpiece length: 14m

CNC deep hole drilling and boring Machine Tool Functions

Working mode of machine tool: workpiece rotating, cutter not rotating, cutter feeding; Workpiece rotation, tool rotation, tool feed.

Drilling: BTA drilling method, cutting oil is fed into the tool through the gap between the oil pressure head, the tool bar and the hole wall, and discharged through the inner hole of the tool bar with chips.

Push boring: Cutting oil is fed into the tool through the gap between the oil pressure head, the tool bar and the hole wall, and discharged with chips through the bottom hole of the workpiece. During machining, the tool moves in the direction close to the Headstock.

Pulling and boring: The cutter bar passes through the inner hole of the workpiece to the front end of the spindle of the Headstock, and then installs the cutter. During the machining process, the cutter moves away from the bedhead box. Cutting oil is fed into the tool through the gap between the oil pressure head, the tool bar and the hole wall, and discharged with chips toward the head box through the inner hole of the workpiece.

1.3 CNC deep hole drilling and boring machine Main uses and overall layout of machine tools

The machine tool is specialized in processing deep holes of cylindrical and square workpieces. The machine bed has strong rigidity and good accuracy retention. It can be adapted to the inner hole machining of large workpieces. The spindle speed range is wide, and the feed system is driven by AC servo motor, which can adapt to the needs of various deep hole machining technologies. The oil dispenser servo tightens the workpiece.

1.3.1 Main components of machine tools

Bed body,Headstock, oil pressure head, tool bar support, sliding rail, rack and pinion, cooling system, SIEMENS control system, electric box, center frame, etc.

1.3.2 Workpiece clamping

The chuck on the bedhead box clamps one end of the workpiece, and the taper on the oil dispenser clamps the other end of the workpiece

Workpiece clamping diagram

1.3.3 Machine Tool Control System

Control System: SIEMENS-828D

Z servo axis: longitudinal feeding motion of drill pipe box, servo motor drives rack and pinion mechanism through reducing mechanism. Equipped with grating ruler, closed-loop control.

X Servo Shaft: The oil pressure head servo tightens the workpiece, and the servo motor drives the rack and pinion mechanism through the reduction mechanism.

1.3.4 The foundation parts such as box body, bed body and pallet are precision cast with high-quality cast iron. After casting, they are subjected to two aging treatments to eliminate internal stress, stabilize the structure and size, and improve mechanical properties.

1.3.5 Bed (sectional view)

The bed body is cast with resin sand and normalized after casting. The bed body adopts a split structure, which is assembled together using high-strength bolts and positioned with tapered pins.

Adopt double rectangular sliding guide rail, precision grinding, high quenching hardness of guide rail surface.

Width × thickness of single guide rail =180mm ×50mm, total width of guide rail 800mm; A helical rack (module 6) is assembled in the bed body, which is used for tool feeding transmission, the rack is precise processed and quenched, and has high guiding precision and good wear resistance; The precision rack is mounted in the middle of the bed rail for the feeding and rapid movement of the pallet. The machine tool has large load bearing, sufficient rigidity and stable transmission.

V-shaped inclined bars are arranged inside the bed body, which has high support strength and is not easy to deform; The outer wall of the bed body directly supports the guide rail, the guide rail can bear large cutting force, the guide rail has good rigidity, and is not easy to deform and shake in the processing process, which is beneficial to improving the processing quality and efficiency of the machine tool.

The periphery of the bed body is equipped with apron-type protection.

1.3.6 Headstock

Used for driving the workpiece to rotate, fixed at the left end of the bed body, manual 3 gears, stepless speed adjustment in the gear, motor drives the spindle to rotate through a coupling and a gear box, and the front end of the bed head box is equipped with a manual chuck for clamping the workpiece.

Made by precision grinding of gears; The gear tooth surface is treated with high frequency quenching, so that the gear can obtain high strength, high hardness, high wear resistance and high fatigue limit, and can bear relatively large alternating load and impact load.

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

1.3.7 Drilling box part:

Used for driving workpiece rotation, mounted on feed pallet, manual 12 speed adjustment, motor drives spindle rotation through coupling, gearbox, spindle front end toolholder connecting sleeve, used for clamping toolbar.

Made by precision grinding of gears; The gear tooth surface is treated with high frequency quenching, so that the gear can obtain high strength, high hardness, high wear resistance and high fatigue limit, and can bear relatively large alternating load and impact load.

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

The drill pipe box has two structural designs: rotating and fixing, and can lock the drill pipe box when the drill pipe is not required to rotate.

1.3.8 Closed center frame

For supporting workpieces; Three-point closed center frame structure, two lower rollers, one upper roller, and the rollers are equipped with tapered roller bearings; The lower two rollers adjust the lateral position through the screw; Manually adjust the position of the center frame on the bed guide rail by rack and pinion. It mainly plays the role of supporting the workpiece. The closed center frame is an auxiliary device for clamping workpieces, that is, it can be used when drilling slender shafts, and it can also be used for machining large and long workpieces with large diameter.

 

1.3.9 Open center frame

For supporting workpieces;

Two lower rollers, the rollers are equipped with tapered roller bearings; The lower two rollers adjust the lateral position through the screw; Manually adjust the position of the center frame on the bed guide rail by rack and pinion. It mainly plays the role of supporting the workpiece. The center frame is an auxiliary device for clamping workpieces, that is, it can be used when drilling slender shafts, and it can also be used for machining large and long workpieces with large diameter.

1.3.9 Oil pressure head(spindle structure)

Used for tool guidance, oil supply and support; Servo motor is used to drive its axial movement, which can adapt to the machining of different lengths of workpieces, as well as tightening and loosening of workpieces. The machine tool cooling and hydraulic display instruments are installed on the front of the oil dispenser, so that the machine tool can be displayed dynamically during machining, which is convenient for the operator to judge the machining situation of the machine tool.

The servo motor is used to drive the oil dispenser to tighten or loosen the workpiece, which has high precision and high rigidity; The whole oil dispenser adopts box structure with high precision and high rigidity.

In order to facilitate the operation of machine tools, the oil dispenser has a unique design. Only the corresponding cutting tools and auxiliary tools need to be replaced to realize the switching between drilling and boring, and the oil dispenser will not retreat due to excessive oil pressure during drilling or boring.

 

1.3.10 Feed System:

Used to drive the axial movement of the tool.

The servo motor drives the double gear structure through the reducer, rack modulus 6, helical rack.

The automatic lubrication station is used for the time and quantitative lubrication of the sliding rail surface.

A button plate is installed on the pallet, which has the functions of drill pipe box spindle jog, feed forward, feed backward and emergency stop.

Double gear transmission: A servo motor is divided into two transmission gears through the gear train, and the rack on the bed body is used to drive the cutter forward and backward.

1.3.11 Toolbar bracket

Supporting the cutter rod and controlling the moving direction of the drill rod; It adopts a high rigidity integral structure with a support sleeve on it, which can absorb the impact and jitter generated in the processing process.

 

1.3.12 Cooling System:

It is mainly composed of cooling pump, chip receiving box, oil tank, etc., which provides enough cutting oil for deep hole processing.

Above-ground fuel tank, the fuel tank is fully welded with high-quality steel plate.

Install a telescopic protective cover between the chip receiving boxes on the fuel tank to cover the fuel tank and avoid debris falling into the fuel tank.

The pressure, level, temperature and flow of cutting oil can be displayed digitally on the control station.

1.3.13 Electrical Control System:

Main electrical components adopt Schneider brand, which is more stable and reliable. It greatly reduces the failure rate of the equipment and increases the stability of the machine tool.

1.3.13 Chip discharge bucket: recycle iron chips and cutting fluid to prevent cutting fluid from splashing.

When drilling, the internal chip discharge method (BTA) is adopted. Cutting oil is supplied from the oil dispenser, enters the cutting area through the annular cavity formed by the outer edge surface of the drill pipe and the machined surface, and carries chips to the rear through the inner hole of the drill pipe (in the direction of the drill pipe box), enters the rear chip discharge pipe, and flows into the chip receiving box.

When boring, the external chip discharge mode is adopted, and the cutting oil is supplied from the oil delivery device, enters the cutting area through the annular cavity formed by the outer edge surface of the drill pipe and the machined surface, carries the chips to the front row (the direction of the bedhead box), enters the front chip discharge hopper, and flows into the chip receiving box.

1.3.14 CNC Deep hole drilling and boring Machine Tool Lubrication:

The sliding guide rail surface of the feed pallet is lubricated by automatic lubrication station at time and quantitatively, and has the function of low liquid level alarm.

The bearings and gears of the bedhead box are circularly lubricated by independent external oil tank, and have the function of low liquid level alarm.

The bearings and gears of the drill pipe box are circularly lubricated by independent external oil tank, and have the function of low liquid level alarm.

The oil dispenser support plate and the tool bar support support plate are lubricated by manual lubrication pump.

Contact : Lean Lee 

Mob :008615153489973

Email : export@dzguanlu.com

 

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