Heavy Deep Hole Drilling And Boring Machine

Heavy deep hole drilling and boring machine

 

1. Machine Tool Overview

1.1 Processing Range

‌Drilling diameter: Φ40 – Φ150 mm

Boring Diameter‌: Φ50 – Φ450 mm

‌Workpiece Outer Diameter‌: Φ100 – Φ500 mm

1.2 Functions of Heavy deep hole drilling and boring machine:

‌Boring Operation‌:
Cutting oil is delivered through the distributor, tool rod, and the gap between the hole wall, enabling efficient chip removal via the bottom of the hole. The tool advances toward the headbox, ensuring stable deep-hole machining with continuous cooling and lubrication.

 

2. Main Structure of Heavy deep hole drilling and boring machine:

 

2.1 Key Components

Bed ,Headbox,Distributor,Tool Rod Supports,Sliding Rails,Gear Rack,Cooling System,Control System,Electric Cabinet,Workpiece Cradle

 

2.2 Workpiece Clamping

Utilizes conical discs mounted on both the headbox and distributor.

Workpiece ends are chamfered to ensure precise alignment.

CNC-controlled axial movement of the distributor enables automatic clamping and positioning, improving setup accuracy and operational efficiency.

2.3 Heavy deep hole drilling and boring machine Control System

‌Control System‌: Equipped with ‌FANUC CNC system‌ for high-precision, stable, and reliable control.

‌Z-Axis (Longitudinal Tool Feed)‌: Driven by a servo motor through a ‌reduction mechanism‌, transmitting motion via a gear rack for smooth, accurate, and powerful feed control.

‌X-Axis (Oil Distributor Clamping)‌: Servo motor-driven gear rack enables precise and responsive clamping action of the oil distributor, ensuring consistent sealing and alignment during deep-hole boring.

The integration of FANUC control ensures seamless coordination between tool feed, clamping, and cooling functions, supporting complex machining cycles with high repeatability and dynamic response.

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2.4 Bed Body, Bed, and Support Plate

Constructed from ‌high-quality cast iron‌ with ‌double aging treatment‌ (natural aging + stress-relief annealing) to eliminate internal stresses, ensuring long-term geometric stability and resistance to deformation under heavy loads.

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2.5 Bed Structure of Heavy deep hole drilling and boring machine:

‌Casting Process‌: Resin sand casting technology ensures dense, uniform material structure with excellent dimensional accuracy.

‌Heat Treatment‌: Normalizing treatment further enhances material strength and toughness.

‌Assembly Design‌: Split-type bed structure connected with ‌high-strength bolts‌ and ‌tapered dowel pins‌ for precise positioning and easy maintenance or transportation.

‌Guideway System‌:

Dual rectangular sliding guides

Precision ground and ‌quenched‌ for high surface hardness (HRC 50–55)

Ensures excellent load-bearing capacity, wear resistance, and long service life

‌Transmission System‌:

Internal helical rack for tool feed drive

Precision machined and quenched to ensure smooth engagement and high transmission accuracy

‌Structural Reinforcement‌:

V-shaped diagonal ribs integrated into the bed for enhanced rigidity and anti-deformation performance

External wall supports guide rails, effectively resisting heavy cutting forces and dynamic loads

‌Vibration Control‌: High guide stiffness minimizes vibration during machining, contributing to superior surface finish and bore straightness

‌Lubrication & Oil Management‌:

Peripheral ‌return oil grooves‌ with ‌oil shields‌

Automatically channels used cutting oil back to the central cooling system, ensuring a clean workspace and efficient fluid recycling

This robust bed design is engineered for high-duty-cycle industrial applications, offering exceptional stability, precision retention, and durability under continuous deep-hole machining conditions.

 

2.6 Headstock of Heavy deep hole drilling and boring machine:

‌Function‌: Drives the workpiece rotation and is mounted at the left end of the bed.

‌Drive System‌:

‌Three-speed manual selection‌ with ‌infinite speed adjustment within each gear range‌

Power transmission via ‌belt and gearbox‌ to the spindle, ensuring smooth and efficient torque delivery across operating conditions

‌Gear Characteristics‌:

Gears are ‌precision ground‌ for minimal backlash and high meshing accuracy

‌High-frequency induction hardening‌ applied to gear tooth surfaces, enhancing strength, surface hardness (HRC 50–55), wear resistance, and fatigue life

Capable of withstanding high alternating and impact loads during deep-hole boring operations

‌Lubrication System‌:

‌External oil reservoir‌ provides continuous circulation lubrication for gears and bearings

Equipped with ‌low-level oil alarm device‌ to monitor lubricant volume in real time, preventing damage due to insufficient oil

‌Control Panel on Headstock Housing‌:Integrated button panel for immediate access to key functions:

Spindle inching (jog)

Feed advance

Feed retract

‌Emergency stop (E-stop)‌ button for instant shutdown in hazardous situations

The headstock design combines mechanical robustness with operational safety and maintenance convenience. The hardened, precision-machined gears ensure long-term reliability under heavy-duty use, while the external lubrication system with alarm monitoring supports predictive maintenance and reduces unplanned downtime.

2.7 Tool Holder Unit (Servo-Driven Oil Distributor) 

‌Function‌:
The tool holder unit, also known as the ‌servo-driven oil distributor‌, is a critical component in deep hole boring machines. It ensures precise guidance of the boring tool while simultaneously delivering high-pressure cutting oil to the cutting zone and facilitating efficient chip removal through the tool's internal channel.

‌Core Features‌:

‌Servo-Driven Axial Positioning‌:
Equipped with a servo motor and precision gear-rack mechanism for accurate, programmable control of the oil distributor's axial movement. Enables automatic alignment and clamping of the workpiece end, ensuring consistent sealing and coaxiality.

‌High-Pressure Oil Sealing & Distribution‌:
Provides dynamic sealing between the tool holder and workpiece bore, allowing cutting fluid to be injected at pressures up to 6–10 MPa. Ensures effective cooling, lubrication, and chip evacuation during deep-hole machining.

‌Integrated Tool Guidance System‌:
Features precision bushings and support bearings that guide the boring bar with minimal runout, enhancing hole straightness and surface finish (especially critical for depth-to-diameter ratios >10:1).

‌Automatic Workpiece Clamping Interface‌:
CNC-controlled actuation allows the oil distributor to move axially and apply clamping force against the workpiece shoulder, enabling secure fixation without manual intervention.

‌Modular Design‌:
Interchangeable sealing heads and adapter sleeves allow compatibility with various bore diameters (Φ50–Φ450 mm range), supporting flexible setup for different workpiece types.

‌Performance Advantages‌:

Enables ‌push-type boring‌ with rear-end chip discharge, reducing chip recutting and thermal deformation.

High rigidity and damping characteristics minimize vibration during long-reach machining.

Fully synchronized with the FANUC CNC system for coordinated motion with Z-axis feed and spindle rotation.

 

2.8 Boring bar support rest of Heavy deep hole drilling and boring machine:

Used to support the boring bar ;

Adopt a integrate structure with high rigidity , the support sleeve is mounted on it , which can absorb the impact, vibration, etc. generated during the processing.

Install an automatic hanging mechanism. When returning the tool, the feeding carriage can automatically pull the drill bar support rest back to its initial position.

‌Main Components of cooling system‌:

‌Cooling Pump‌:

Features ‌three sets of positive displacement vane pumps‌, each delivering ‌200 L/min‌ of cutting oil (total: 600 L/min).

Flow from each pump is independently adjustable via ‌ball valves‌, enabling precise control tailored to specific materials, tools, and cutting conditions.

Provides stable, high-pressure oil delivery directly to the cutting zone through the tool's internal channel.

‌Oil Tank (Floor-Mounted)‌:

Fabricated from ‌high-quality steel plate‌ with full welding for maximum structural integrity and leak resistance.

Large-capacity design supports extended, uninterrupted operation-ideal for heavy-duty production environments.

Floor-mounted layout simplifies installation, maintenance, and integration into existing workshop setups.

‌Chip Removal System‌:

Includes a robust ‌chip conveyor‌ that automatically transports swarf from the machining area to a ‌ground-level chip collection cart‌.

Enables continuous, unattended operation while keeping the workspace clean and safe-essential for 24/7 production lines.

‌Filtration System‌:Dual-stage purification process:

‌Wire mesh filter‌ removes coarse particles.

‌Serpentine sedimentation channel‌ inside the tank allows fine contaminants to settle naturally, enhancing oil cleanliness over time.

This efficient filtration combination reduces nozzle clogging, minimizes wear, and extends both tool and fluid service life.

‌Flow Monitoring‌:

Cutting oil flow rate is ‌digitally displayed on the operator station (HMI)‌ in real time.

Enables instant detection of flow anomalies (e.g., clogged filters or pump issues), supporting proactive maintenance and consistent machining quality.

‌System Integration & Performance Benefits‌:

Fully synchronized with the ‌FANUC CNC control system‌ for automated start/stop, interlock protection, and seamless operation within the machining cycle.

Supports ‌push-boring with rear-end chip ejection‌, a core requirement for deep-hole drilling where chip evacuation and thermal control are critical.

Clean, high-pressure oil flow significantly reduces thermal deformation and tool wear, resulting in superior ‌bore straightness‌, ‌surface finish‌, and ‌dimensional accuracy‌.

‌Maintenance & Industrial Reliability‌:

Open-access design allows easy inspection and servicing of pumps, filters, and tank internals.

Optional upgrades include low-level alarms, pressure sensors, and remote monitoring modules for predictive maintenance and smart factory integration.

 

2.11 Feeding carriage of Heavy deep hole drilling and boring machine

Used for driving the cutting tool to move axially .

Lubricate the sliding guide surface timely and quantitatively with an auto lubrication station .

The button board is mounted on the carriage ,which has functions of feeding forward,

feeding backward, emergency stop.

The servo motor drives the cutting tool to move axially through a parallel gear reducer and rack and pinion, without a turbine worm mechanism, and does not require frequent replacement of the copper nut .

 

2.12 Lubrication system

The sliding guide rail surface of the feeding carriage adopts automatic lubrication station for timed and quantitative lubrication, with a low liquid level alarm function .

The bearings and gears of the headstock are circulating lubricated by an independent external oil tank, and have a low liquid level alarm function.

The oil pressure head carriage, boring bar support rest carriage are lubricated by manual lubricating pump .

2.3.13 Workpiece carrier

Used for workpiece pre-positioning .

The operator places the workpiece on the workpiece carrier first, and after the workpiece is clamped and positioned, the workpiece separate with the carrier.

The V-shaped frame on the workpiece carrier is manually lifted and lowered using a T-shaped screw.

3. Main parameters of Heavy deep hole drilling and boring machine: 

4. Machine Protection Measures of Heavy deep hole drilling and boring machine:

‌Lubrication System Low-Oil Protection

‌Cooling System Level and Pressure Protection

‌Spindle Box Motor Overload Protection

‌Feed Drive Motor Load Protection

‌Cooling Pump Motor Fault Alarm

‌Headstock Motor Fault Alarm

‌Limit Position Protection

 

Photo of Heavy deep hole drilling and boring machine :

 

Welcome to contact us by :

 

Email : grace@dzguanlu.com

Wechat/whatsapp: +86 15153489972

Name : Grace Lee

 

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