1. Machine Tool Overview

1.1 Machining Range of the Machine Tool

Drilling range: Φ30～Φ100 mm

Boring range: Φ40～Φ360 mm

Trepanning range: Φ80～Φ160 mm

Workpiece outer diameter range: Φ90～Φ500 mm

1.2 Machine Tool Functions

Functions include drilling, boring and trepanning.

Drilling: BTA drilling method, chips are discharged backward through the tool bar.

Boring: Push‑boring method is used for through‑holes, chips are discharged forward through the bottom hole of the workpiece.

Trepanning: External oil supply with internal chip removal. The cooling medium is supplied to the cutting tool via the oil feeder, carrying chips to be discharged through the inner bore of the tool bar.

1.3 Main Structure of the Machine Tool

1.3.1 Main Machine Components

Bed body, headstock, oil feeder, tool bar support, drill rod box, sliding guideways, gear rack, cooling system, control system, electrical cabinet, workpiece rest, etc.

1.3.2 Workpiece Clamping

One end of the workpiece is held by the manual three‑jaw chuck mounted on the headstock, and the other end of the workpiece is automatically pressed against by the taper disc of the oil feeder.

1.3.3 Machine Tool Control System

Control System: KND

Z‑axis: Longitudinal feed motion of the drill rod box. The servo motor drives the gear‑rack mechanism through a reduction unit.

X‑axis: Servo‑powered pressing of the workpiece by the oil feeder. The servo motor drives the gear‑rack mechanism through a reduction unit.

1.3.4 Basic Components such as Boxes, Bed Body and Pallet

Basic components including boxes, bed body and pallets are precision‑cast from high‑quality cast iron. After casting, they undergo two‑time aging treatment to eliminate internal stress, stabilize microstructure and dimensions, and improve mechanical properties.

1.3.5 Bed Body

The bed body is resin‑sand cast and normalized after casting. It adopts a split structure, assembled together with high‑strength bolts and positioned by taper pins.

Double rectangular sliding guideways are applied with precision grinding, and the guideway surfaces feature high hardness after quenching.

Helical racks are installed inside the bed for tool feed transmission. The racks are precision‑machined and quenched. The machine tool features heavy load‑bearing capacity, sufficient rigidity and stable transmission.

V‑shaped diagonal ribs are arranged inside the bed body to provide high supporting strength and resist deformation. The outer wall of the bed directly supports the guideways, enabling the guideways to withstand heavy cutting forces with high rigidity. Deformation and chatter are minimized during machining, which helps improve machining quality and efficiency.

Oil return grooves are cast around the bed body, with oil splash guards mounted on the grooves. Cutting oil on the bed flows back to the cooling oil tank automatically.

1.3.6 Headstock

Mounted on the left end of the bed body, it is used to drive workpiece rotation.

A servo spindle motor drives the spindle rotation via belts and gearbox. A manual chuck is fitted at the front end of the headstock for workpiece clamping.

Helical gears are precision‑ground with tooth surfaces subjected to high‑frequency quenching. This endows gears with high strength, high hardness, excellent wear resistance and high fatigue limit, enabling them to bear considerable alternating and impact loads.

An external lubrication tank provides circulating lubrication for gears and bearings, and a low‑level alarm device is installed inside the tank.

A button panel is fitted on the headstock housing, providing functions including spindle jog, feed forward, feed backward and emergency stop.

The oil return hole on the housing is relocated upward to retain lubricating oil inside the housing, so that the lower gears can be splash‑lubricated.

1.3.7 Oil Feeder

It is used for tool guiding, oil supply to the tool and tool bar support.

It is driven by a servo motor for axial movement, to suit machining of workpieces of different lengths, as well as pressing against and releasing the workpiece. The servo motor can operate in torque mode or position mode.

The rotary bearing of the oil feeder is mounted inside the oil‑feeder body, featuring high rigidity and high rotational accuracy.

The rotary seal is fitted on the outside of the right‑hand end of the oil‑feeder body for easy maintenance.

A tool‑bar support sleeve is installed at the right end of the oil feeder to support the tool bar.

The left end of the oil feeder is equipped with a guide sleeve, taper disc and oil‑baffle device. The taper disc is used for workpiece positioning, and the guide sleeve serves for tool guidance.

The oil‑baffle device adopts a push‑pull structure. An oil‑receiving box is fitted under the oil‑baffle device so that cutting oil flows back to the oil tank.

1.3.8 Drill Rod Box

It is used to drive tool rotation and is mounted on the feed pallet.

It features manual 12‑speed adjustment. The motor drives the spindle to rotate via belts, pulleys and gear trains.

A tool shank adapter is fitted at the left end of the spindle for tool clamping.

A chip discharge hopper is installed at the right end of the spindle for chip removal.

Spur gears are applied for gear‑shifting positions, while helical gears are used for non‑shifting positions. All gears are precision‑ground; their tooth surfaces are subjected to high‑frequency quenching. This provides gears with high strength, high hardness, excellent wear resistance and high fatigue limit, allowing them to withstand substantial alternating loads and impact loads.

An external lubrication tank delivers circulating lubrication for gears and bearings, and a low‑level alarm device is installed inside the tank.

1.3.9 Tool Bar Support

It is used to support the tool bar.

It adopts a high‑rigidity monolithic structure fitted with support sleeves, which can absorb shocks, chatter and other disturbances generated during machining.

An automatic pull‑hitch mechanism is equipped. During tool retraction, the feed pallet can automatically pull the tool bar support back to its home position.

1.3.10 Cooling System

Mainly composed of cooling pump, chip‑receiving box, oil tank and other components, it supplies sufficient cutting oil for deep‑hole machining.

It adopts a floor‑standing oil tank fabricated with full welding of high‑quality steel plates.

Telescopic protective covers are installed between the chip‑receiving boxes on the oil tank to cover the tank and prevent foreign matter from falling into it.

Numerical displays for cutting oil pressure, liquid level, oil temperature and flow rate are available on the operator station.

One set of sewage pump and one set of centrifugal pump are installed. The sewage pump is for boring operations and the centrifugal pump is for drilling operations, with independent control for each.

1.3.11 Feed Pallet

It is used to drive axial movement of the tool.

The servo motor drives a double‑gear structure through a reducer, mating with module‑6 helical racks.

An automatic lubrication station provides timed and quantitative lubrication for the sliding guideway surfaces.

A button panel is mounted on the pallet with functions including drill‑rod‑box spindle jog, feed forward, feed backward and emergency stop.

Double‑gear transmission: One servo motor distributes power to two driving gears through a gear train, which drives the tool to move forward and backward via the racks on the bed body.

1.3.12 Lubrication System

The sliding guideway surfaces of the feed pallet are lubricated at fixed time intervals with fixed quantity by an automatic lubrication station, equipped with low‑level alarm function.

Bearings and gears of the headstock are circulated‑lubricated by a separate external oil tank with low‑level alarm function.

Bearings and gears of the drill rod box are circulated‑lubricated by a separate external oil tank with low‑level alarm function.

The oil‑feeder pallet and tool‑bar‑support pallet are lubricated by a manual lubrication pump.

1.3.13 Workpiece Rest

It is used for pre‑positioning of workpieces.

The operator places the workpiece onto the workpiece rest first. After the workpiece is fully clamped and positioned, the workpiece moves away from the rest.

The V‑block on the workpiece rest is manually lifted and lowered by a T‑type lead screw.

2. Main Machine Tool Parameters

Technical Specifications

Working range

Drilling range: Φ30～Φ100mm

Boring range: Φ40～Φ360mm

Trepanning range: Φ80～Φ160mm

Machining depth: 4000mm

Workpiece outer diameter range: Φ90～Φ500mm

Workpiece length range: 500‑4000mm

Machine tool performance

Z‑axis (drill rod box feed) Feed speed range: 5～1000mm/min

Rapid traverse speed: 2000mm/min

Servo motor torque / power: 28Nm / 4.4KW

Maximum feed force: 100KN

X‑axis (oil feeder movement) Rapid traverse speed: 2000mm/min

Servo motor torque / power: 23Nm / 3.6KW

Maximum pressing force: 60KN

Drill rod box

Rotational speed range: 27～330r/min

Motor power: 30KW, standard motor

Gear positions: Manual 12‑step speed regulation

Spindle front taper bore: Metric 85, taper ratio 1:20

Headstock

Rotational speed range: 30～60r/min

Motor power: 45KW, servo spindle motor

Spindle front taper bore: Metric 85, taper ratio 1:20

Chuck: Φ630mm, three‑jaw type

Other parameters

Total installed power of machine tool: 102KW

Maximum workpiece load capacity: 3 tons

Guideway width: 600mm

Machine tool floor space: 14.5m × 3.3m

Height from spindle centerline to top surface of guideway: 500mm

Maximum tool‑bar passing diameter of oil feeder: Φ220mm

Spindle axial play: ≤0.018mm

Spindle radial run‑out: ≤0.015mm

Cooling system

Centrifugal pump

Flow rate: 12m³/h

Head: 100 m

Power: 11KW

Sewage pump

Flow rate: 30m³/h

Head: 40 m

Power: 7.5KW

Approximate oil tank capacity: 5000L

3. Other Machine

4. Contact Me：

Email：sale@dzguanlu.com

Whatsapp/Wechat:+8613853423246

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