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Machining Center for Machining Center for Mass Production Parts Mass Production Parts

MachiningMachining【【 NXNX--SeriesSeries 】】

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Voices from Automotive Voices from Automotive Parts Production SitesParts Production Sites

• Machines are too big for the workpiece sizes. Palm-sized workpieces are currently processed on a machine which is over 1000mm in width.

• Workpiece life is getting shorter, and lines are now often changed. However, lines based on specialized machines are often inflexible, more expensive and take a long time to convert.

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LineLine--up for Mass up for Mass Production LinesProduction Lines

680 mm 955 mm 1,550 mm

NX2000 SERIES NX3000 SERIES NX4000 SERIES

NXH2000 SERIES

NXV2000 SERIES

NXT2000 SERIES

NXH3000 SERIES

NXV3000 SERIES

NXH4000 SERIESHorizontal MC

Vertical MC

Turning Center

Horizontal MC

Vertical MC

Horizontal MC

Pallet Size

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Target WorkpiecesTarget Workpieces

Φ140×100 mm Φ400×400 mm Φ700×700 mm

NX2000 SERIES NX3000 SERIES NX4000 SERIES

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NXNX Series DesignSeries DesignModular concept with unified size Modular concept with unified size

955 mm

955 mm

1,000 mm

NXH3000 DCGHorizontal MC

NXV3000 DCGVertical MC

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NX2000 Axis Configuration• By making heaviest axis the vertical axis,

machine is stabilized and vibration reducedColumn

fixed

Y-axis saddle vertical motion

X-axis saddle side-to-side motion

Z-axis spindle head front-to-back motion

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Flexibility by Removing one axis

or

from 3 axis to 2 axis moving unit

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Reconfigurable Capability

Vertical Bed Vertical Spindle

3AX Column

VMC

2AX Table

VMC/5AX

Turning Spindle

VT

Horizontal Bed Horizontal Spindle

HMC

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Flexible Changes to Flexible Changes to Production Line LayoutProduction Line Layout

ReconfigurReconfigurationation

Meets changes in production amountby changing the number of machines in the line

Meets changesin workpieces by changing the line formation

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Unlike conventional machines, DCGTM quickly eliminates vibration during positioning. Rotational vibration, which occurs at all acceleration start points, is reduced to an amount equal to the distance between the drive point and the center of gravity. This prevents the deterioration of the machined surface.

Without DCG

With DCG

Residual vibration after positioning

Pushing moving parts at the center of gravity with twin ball screws

Box-in-Box Constructionfor compact design

DD CC GGDriven at the Center of GravityDriven at the Center of Gravity

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High PrecisionHigh PrecisionRoundness Thermal DistortionWith S5000, F1000and diameter 40mm,roundness is 2.9μｍ

Less than ½ that ofconventionalmachines

(Material: A5052)

Because it is small, rigidity is increased, allowing high precision.

Because it is light, it is very responsive, so its contouringaccuracy is good.

Because the moving parts are light, there is almost no vibration.

Because energy consumption is low, little heat is generated.Thermal expansion is small.

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Accessibility to WorkpiecesAccessibility to Workpieces

Gantry LoaderGantry Loader

Work ConveyorWork ConveyorRobotRobot

• Spindle 3-axis travel→Simple fixture layout, etc.• Workpieces can be transferred from right, left,

top or front

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Small is an advantageSmall is an advantageIdeal functions and size for small workpieces.Ideal functions and size for small workpieces.

A small machine has big advantages.

HighPrecision

HighSpeed

HighEfficiency

2,610 mm

2,300 mm 3,755 mm

2,500 mm

955 mm3,000 mm

NX3000 floor size comparisonWith the NH4000 DCG horizontal MC

NX3000 Series→Work Size Max.Φ４００NX2000 Series→Work Size Max.Φ１４０

-- NXH3000DCG NXH3000DCG --

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Chip DisposalChip Disposal

There is excellent access to the table. Parts which need daily maintenance are gathered at the front and rear.

Chips do not accumulate behind the protector because they are discharged by pit or conveyor to the front or rear.

Chip chuter directly below the table

Center trough conveyor Side disposalchip conveyor

Operability, Operability, MaintenanceMaintenance

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NX2000 Series NX2000 Series ExamplesExamples

１６．７ｍ

Workpiece travel distance is 30% less than previous models

Workpiece transfer shuttle

Workpiece stocker

1313--Second Piston LineSecond Piston Line

Total 11 NX2000 Machines

Horizontal MC → 4Vertical MC → 4Vertical Lathe → 3

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Productivity per floor spaceProductivity per floor space→→40% UP40% UP

4.6m

7.2m

2.9m

6.8m

NX2000 NX2000 SeriesSeries ExamplesExamples

1 robot can transfer workpieces between 6 machinesNX LinePrevious models

Robot

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New Model New Model PickPick--up Turnup Turn【【NPNP】】

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・CompactCompact・Small floor space: Space-savingproduction line・Low: good visibility over factory

・Improving speedImproving speed・Reduced feed acceleration time constant・Reduced spindle acceleration time・Reduced tool indexing time

・Improving flexibility of systems・Construct line transfer systems

Development Aim/ConceptDevelopment Aim/Concept

19/22328812001235

2807

1550

2350

1700

※

※

Red frame・Red figures: Mori

Seiki machine

Machine volume 85% of competitor’smachineFloor space 97% of competitor’smachine

Cover-line height

55% of competitor’smachine

※

Compact Compact Competitor’s

machine

Mori Seiki

Competitor’s machine

The height which allows the operator to see the next lineThe height which allows the operator to see the next line

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CharacteristicsCharacteristics

Gun drill

High-output spindle (30/22kW) 1.6sec/5000min-1

Turning gang type turret (12 tools)

Workpiece loading pathWe are also preparing a turret with a built-in motor

Z-axis slideway42m/min

The aim is to improve cutting

・

High-speed X-axis feed110m/min

1G

Because the moving parts (spindle) have a low center of gravity,Because the moving parts (spindle) have a low center of gravity,there is little vibration during highthere is little vibration during high--speed feedspeed feed

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StandStand--AloneAlone TypeType

Gun drill

Spindle (15/11kW)

8-station Built-in turret

X-direction feed

Workpiece loading path

Acceleration 1.0GSpindle-core cooling

Slideway

X-direction

Ｚ方向 Z-axis direction

Rear-ejection conveyor

X- axis stroke

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Robot TransferRobot Transfer

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9200

800

120020002035 (competitors)

9375 (competitors)

Appearance (Line Spec.)Appearance (Line Spec.)

Red figures: Mori SeikiRed figures: Mori Seiki

15501550

22002200

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Started development on August 4, 2005

Design model September 28, 2005

Test machine basic model October 31, 2005

Mock-up model December 7, 2005

Test machine No.1 February 3, 2006

Mass production machine completed on April 21, 2006

6 Months From the Start of Development 6 Months From the Start of Development to Completion of Test Machineto Completion of Test Machine

Evaluation period: 2.5 months 4 test machines were made.

8 meetings with the customer until the design completion (3 months)Initial model

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