4m CNC Deep Drill Boring Machine Two-Time Aging Cast Bed Double Rectangular Hard Guide Rail Independent Cooling Circulation System With Multi-Sensor Monitoring

1. Ultra-Rigid Split Machine Bed

The bed adopts split splicing structure connected by high-strength bolts and taper pin positioning, equipped with two wide rectangular medium-frequency quenched hard guide rails (single rail 180×50mm, total rail width 800mm). Internal M6 precision quenched rack is installed for feed transmission, with V-type reinforced rib layout inside the bed to maximize anti-deformation capacity, bearing up to 10 tons workpiece weight. The outer side of guide rail is equipped full apron leakage-proof protective cover to isolate coolant and metal scraps.

 

Bed Section Drawing

2. Multi-Speed Headstock For Workpiece Driving

Headstock is fixed on the left end of bed, used to clamp and drive workpiece rotation. It adopts 3 manual shift gears with stepless speed regulation within each gear, speed range 4~440r/min, matched with 45KW main motor. Internal gears are precision ground and high-frequency quenched, equipped with independent circulating oil lubrication system to extend bearing and gear service life. Standard Φ630 three-jaw manual chuck is installed at front spindle nose for stable clamping of large-diameter blanks.

 

Headstock 3D Structure

3. Adjustable Speed Drill Box (Tool Driving Unit)

Drill box is mounted on feed carriage, supports locked fixed mode or rotary mode of cutting tool, with 12 manual shift gears, speed range 40~500r/min, matched with 30KW driving motor. Internal transmission components adopt high-hardness quenched gears and circulating lubrication system, stable output torque for deep hole drilling & boring. Front spindle end is fitted standard tool bar connecting sleeve for quick replacement of drill/boring bars.

 

Drill Box Structure

4. Servo-Driven Oil Feeder (Workpiece Top Tightening Unit)

Oil feeder adopts independent X servo axis control, driven by 4.3KW servo motor, automatically moving along bed to adapt different workpiece lengths and complete hydraulic cone disc top tightening. Operation panel integrates real-time digital display of cooling pressure, flow, temperature and liquid level. By replacing matching guide sleeves, users can quickly switch between drilling and boring processes; the anti-backlash structure prevents oil feeder retreat under high cutting pressure during continuous processing.

 

Servo Oil Feeder

5. Closed Three-Point Steady Rest & Tool Bar Support Frame

Closed steady rest: Standard 1 set three-point support structure (2 lower rollers + 1 top roller with taper roller bearings), manually adjustable horizontal position via lead screw, whole unit slides along bed by rack & pinion to support slender long workpieces and suppress cutting vibration.

Tool bar support rest: Equipped with 2 sets high-rigidity integrated support frames, fitted wear-resistant support sleeves to absorb tool bar shock and eliminate shaking during deep hole processing, ensuring consistent hole straightness.

 

Closed Steady Rest

 

Tool Bar Support Frame On Site

6. Dual-Axis Servo Feed Transmission System

Z feed axis (tool carriage longitudinal movement): Driven by 5.5KW/35Nm servo motor via reducer and precision rack pinion, stepless feed speed 0.5~1000mm/min, max cutting thrust up to 60KN, stable heavy feed for deep boring roughing.

X feed axis (oil feeder horizontal movement): Independent servo drive, fast moving speed 1.5m/min, automatic positioning for different length workpieces. All sliding guide surfaces adopt automatic timing quantitative lubrication station with low liquid level alarm function to avoid dry friction damage.

7. Circulating High-Pressure Cooling & Dual Chip Removal System

Large capacity 5300L ground-mounted oil tank with fully welded steel plate structure, equipped 4 groups cooling pump units, max coolant pressure 2.5MPa, total flow up to 800L/min, fitted pressure, flow, temperature and liquid level sensors with digital display on operation station.

BTA Drilling chip removal: Coolant flows into cutting zone through gap between tool bar and workpiece inner wall, chips discharged backward via tool bar inner hole (internal chip removal).

Boring chip removal: Coolant feeds cutting area, chips discharged forward along workpiece inner hole (external chip removal). Telescopic protective cover is installed above the oil tank to block dust and debris, matched centralized chip collection box for unified scrap recovery.

 

Cooling System Layout

 

Coolant Circuit Schematic

8. PLC Intelligent Electrical Control System

The machine adopts Delta PLC core control system, all main low-voltage electrical components use Schneider brand for stable operation and low failure rate. Independent sealed electrical cabinet with built-in industrial air conditioner to stabilize internal operating temperature, effectively avoid component aging under long workshop operation. Multiple safety interlock protection functions are integrated: lubrication shortage alarm, cooling liquid abnormal protection, spindle motor overload protection, feed over-limit protection, cooling pump fault alarm.

 

Electrical Control Cabinet

Three Optional Processing Modes

 

Dual Reverse Rotation

 

Workpiece Only Rotate

 

Tool Only Rotate

Workpiece + Tool Reverse Dual Rotation: Low vibration, best hole straightness, for high-precision finishing boring.

Only Workpiece Rotate: Low tool wear, suitable large-diameter rough boring.

Only Tool Rotate: Ideal for short rigid blanks and small batch deep drilling.

Core Processing Precision Standard

Drilling Accuracy Hole tolerance: IT9~IT11; Surface roughness: Ra6.3~12.5μm; Straightness: 0.5mm per 1000mm

Rough Boring Accuracy Hole tolerance: IT9~IT10; Surface roughness: Ra3.2~6.3μm; Straightness: 0.4mm per 1000mm

Fine Boring Accuracy Hole tolerance: IT8~IT9; Surface roughness: Ra1.6~3.2μm

Main Technical Parameters

Processing Range Drilling diameter: Φ30~150mm; Boring diameter: Φ40~500mm; Max processing depth: 4000mm Max workpiece length: 4000mm; Max swing diameter over bed: Φ1250mm Steady rest clamping range: Φ100~650mm; Max machine load: 10 tons

Axis & Power Parameters Z feed servo: 5.5KW, 35Nm, max thrust 60KN X oil feeder servo: 4.3KW, 27Nm Headstock main motor: 45KW; Drill box motor:30KW Total machine power: ~138KW

Cooling System Tank volume: 5300L; Max pressure:2.5MPa; Max flow:800L/min

Machine Dimension: 17m × 3.8m

Standard & Optional Configuration

Standard Equipped Parts

Split heavy cast bed, headstock with Φ630 3-jaw chuck, 12-speed drill box, servo X-axis oil feeder, closed three-point steady rest, 2 sets tool bar support frames, full circulating cooling system, dual servo feed system, Delta PLC control cabinet with air conditioner, full set lubrication station, complete mechanical & electrical operation manuals, foundation drawing, factory inspection certificate.

Optional Custom Accessories

Custom drill bars & boring bars, matched guide sleeves & cone discs, chain plate automatic chip conveyor, 15KW oil chiller, 50μm paper tape filter, customized special cutting tools, full closed safety protective enclosure.

Main Matching Brand Components

Control System: Delta PLC

X/Z Servo Motors: Maxin Wuhan

Main Drive Motors: Domestic well-known brands

Spindle Bearings: HRB/ZWZ

Precision Transmission Rack: Taiwan YYC

Main Electrical Parts: Schneider

Cooling Pumps & Filter Units: Domestic first-line manufacturers

Applicable Processing Workpieces

This multi-functional deep hole machine is widely used for inner hole processing of long tubular workpieces across industries:

Hydraulic industry: Hydraulic cylinder barrel deep drilling & precision boring

Mining industry: Thick-wall long pipe heavy deep hole rough machining

Metallurgy industry: Large long shaft coaxial deep hole processing

New energy industry: Long seamless steel tube inner hole finishing

General heavy machinery: Cylinder, mandrel, axle deep hole forming

Official Website Links

Deephole series Web: www.dzgljc.com

Heavy duty lathe series Web: www.novatechlathe.com

Contact Information

Contact me: Tina

WhatsApp:+86 17857586156

Email: dezhou@dzguanlu.com

Hot Tags: 4m cnc deep drill boring machine two-time aging cast bed double rectangular hard guide rail independent cooling circulation system with multi-sensor monitoring, China, suppliers, manufacturers, factory, customized, price, cheap, company, cost, for sale