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408b 408mtMilling Milling / Turning5-7 axis Machining Centre Multi- process 6-7 axis Machining CentreBar stock up to ø 40 mm Bar stock up to ø 36 mm

Bar stock or individual parts Machiningautomatic back-working deviceComplete part Machining in a single Cycle

2 3

408b | 408mt - Bar Stock Machining

5-7 axis bar fed machining centres with back-working devices

The latest generation of 408B and 408MT machining centres offers the perfect combination of the technology to machine bar stock of up to Ø 32 mm (Ø 36 mm on 408MT and Ø 40 mm on 408B as an optional extra) and the flexibility provided by their automatic back-working devices. The high-performance motor spindle is suited to the most demanding of machining applications. The high-precision horizontal spindle / divider works just like a divider at low-speed and a lathe spindle at high-speed (408MT).

Machines adapted to the production from small to �

large-sized batches of complex partsBack-working devices with clamping by self-centring �

vice or by collet (internal or external clamping)extensive operating autonomy through bar feeding and �

automatic part unloading, as well as part conditioning

6-sided machining in a single cycle

milling / turning from bar stock up to Ø 32 mm

high-precision and high-quality surface finish

High level of static and dynamic rigidity �

Excellent degree of homogeneity in the �

kinematics chain

High-speed machining, up to 42,000 rpm �

Automatic 0-90° back-working device with �

one working position: vice or collet (internal or external clamping)

Tool magazine up to 48 positions, �

tool change time: 0.8 sec.

Various bar feeders �

Simple, precise, economic parts handling �

systems

Optimum ratio between working volume �

and required floor space

Bar Stock Machining Process with automatic back-working MachiningLoading bar stock into the A axis

Bar stock is loaded from the bar feeder or bar magazine �

(short or long bar stock)positioning is checked �

Bar stock is then clamped in the divider �

1st clampingfront and sides are machined �

Milling operation on 408B and milling / turning opera- �

tions on 408MT commence

Cutting offThe back-working device rotates through 90° (into �

the vertical position) and advances toward the a axis divider in order to clamp the machined part of the bar stockThe B axis motor-spindle moves into the 90° position to �

allow cutting off to commence The 408MT enables cutting off with a chisel �

2nd clampingThe back-working device again rotates through 90° �

(back to the horizontal position)The rear side is then machined, thus allowing the part �

to be completed in a single cycle

Evacuation of machined partThe jaws or collet holding the part are unclamped �

The finished part is evacuated and stored outside the �

machining area. automated systems are available on request

B= -15° / +100°

w= 360°

0°-90°

Z= 300 mm

y= 200 mm

x= 250 mm

u= 80 mm

4 5

100

25

50

75

50

0 1,510,5 2

0 12'000 30'000 42'000

15

10

5

00 12'000 30'000 42'000

12

8

0

Vmax

DesignConstruction

swivelling spindle �

a high level of static and dynamic rigidity is achieved �

thanks to ribbed, compartmentalized cast iron structuresMinimized heat variations occur in the structures thanks �

to a separation between machine area and machining environmentMain structures are located isostatically on a frame, which �

also supports the peripherals

Travel and Axis Definitionx = 250 mmy = 200 mmZ = 300 mma = 360° / 408MT: s2 = 6’000 min-1

B = -15° / +100°u = 80 mmw = 360° (optional on 408B)

Kinematics

Machine CharacteristicsStatics and DynamicsThe application of light construction principles improves the machine’s dynamics and enables high accelerations, speeds and precision positioning:

Construction minimizes structural cantilever effect �

excellent degree of homogeneity in the kinematics chain �

highly repeatable precision �

high natural frequency structure �

High-Performance Motor SpindleTechnical DataThe swivel motor spindles on the 408B / 408M machining centres boast the qualities of compactness, rigidity and reli-ability.

hsk-e40 tool-holder taper �

Broad operating range 500-30’000 rpm �

42’000 rpm (option)high power and torque 15 kw / 12 nm (s6) �

wide angular movement from -15° to +100°, �

-25° to +100° (option)hybrid bearings (ceramic) �

Increased Precision through ThermostabilisationThe motor spindle is designed in such way that heat dissipa-tion occurs by the stator. This enables direct cooling of the system:

high-speed air / oil lubrication makes it possible to lower �

the temperature and control spindle nose dilationSpindle bearings undergo efficient thermostabilisation �

Spindle Orientation Control (W Axis)for operations such as turning, thread chasing and tapping, planing, pinning, dressing, swaging preparation and boring head orientation:

effective and precise blocking with brake applying asym- �

metrical deformation to blocking ring

Linear Axeslinear axes high-precision is ensured by guideways and �

super-precision class preloaded linear roller bearingshomogeneous rigidity within the structural guide system �

is attained without energy dissipation or frictionhigh speeds of 30 m/min �

The linear axis measurement resolution of 0.0001 mm (0.1 �

µm) is put to optimum use

Linear Axis Driveadvantages of the ball screw-nut reduction ratio:

filters out disturbances (irreversible advance command) �

Increased servo-control rigidity �

Rotary Axeshigh torsional rigidity and extensive loading capacity �

high speed and appropriate acceleration according to �

linear axis dynamicshighly dynamic B axis, 0 to 90° in 0.5 sec. �

Maintenance-free operations, i.e. no clearance adjustment �

requiredTable rigidity guaranteed by large axial / radial bearing �

this design ensures very high-precision machining conditions

s1 power in 100% service

s6 power in 40% service

pow

er R

atin

g in

kw

speed in rpm

Torq

ue in

nm

speed in rpm

Low-speed roughing operations with high �

chip-removal rate

High-speed finishing operations compliant �

with High-Speed Machining technology

Machining of materials that are difficult to �

machine such as stainless and chrome-cobalt steels, titanium and alloys, high ceramics

High-pressure cooling through centre (option) �

Thermic Behaviourany thermic drifts are controlled by thermostabilisation within the mechanical components. Thermostabilisation is improved by the cutting fluid cooling.

Curve without dynamic motor spindle compensation

Curve with dynamic motor spindle compensation

dila

tati

on in

%

Time in h

a= 360°s2= 6’000 rpm (408mt)

5-7 axis bar fed machining centres with back-working devices

408 � b : a axis divider for milling operations

408 � mt : a axis spindle / divider for milling and turning operations

Dynamic compensation of motor spindle dilatationThis function permits real-time compensation for geometrical drifts in the mechanical components comprising the motor-spindle caused by overheating and rotation speed.Virtually all geometrical drifts between the machined part and the tools are permanently compensated for.

76

Ø D

A

Ra

Machine EquipmentHSK-E40 Tool Magazine and Changer

24 positions (48 positions optional) �

several positions in magazine for indexed tools �

fast tool change time: 0.8 sec. �

Tool management �

- sister-tool management

- Tool lifetime management (time and number of used tools)

- Tool data saving

Automatic back-working Device1 working-Position 0°-90° swivel Deviceautomatic back-working device on u axis, 80 mm travel, equipment:

self-centring vice �

Internal and external clamping collet �

48-position tool magazine

hsk 40 eTs 9 eTs 16

Milling cutter-holder

Cylindrical chisel-holder

Boring head-holder

Shrink fit tool-holder

hsk 40 head-holder

f-type chuck Chuck for Ottet collet

Mecatool pallet Clamping gps70

5-7 axis bar fed machining centres with back-working devices

A Axis Divider408b 408mt

Milling mode (rpm) � 100 100

Torque (nm) � 250 9 / 29 (s1 / s6)

Turning mode (rpm) � - 6’000

power (kw) � - 1.5 / 3.7 (s1 / s6)

Taper interface � a4 a4

locking (n) � 16’000 at 80 bar

27’500 at 40 bar (hydraulic)

a vast range of chucks permitting clamping of many different bar types (round, square, polyhedron) and blanks is available as standard. Other clamping systems are being developed and adapted according to the application.

Turning Precision (408mt)diameter tolerance �

Circularity �

Cylindricity �

Roughness �

Concentricity �

Ød : IT5 : 0,0015 mm : 0,003 mmRa : 0,6 µm : 0,004 mm

Economic Handling Systems Simple evacuation

Cut-off part recovery system with collet, for machine �

without back-working devicehandling device with collet for part removal, for machine �

with back-working device

Handling ArmTo increase the machine’s machining autonomy, willemin-Macodel recommends a handling arm for loading and unload-ing parts or pallets. The handler has longitudinal and vertical digital axes to permit part handling between the storage and machining areas. Adaptation options for specific startups:

0° to 90° rotating device enabling horizontal / vertical grip �

movement2nd grip adaptation �

Transverse digital table for storing parts in specific com- �

partments, pre-positioning for palletsgrips adapted to applications �

parts orientation station �

The handler can be fitted with a palletizing system for large series of parts. This then makes it possible to handle pallet transfer during idle time without ceasing production.

Precise positioning �

Simple to operate �

Quick return on investment �

Small dimensions �

Handling arm fitted on the machine side with accessible door

Back-working device with vice

Bar Stock MachiningA wide range of bar feed systems can be fitted according to bar stock types (different shapes and lengths) to help meet requirements such as bar guidance, bar swarf evacuation, or production autonomy.

Cut-off part recovery system for machine without back-working device

8 95-7 axis bar fed machining centres with back-working devices

The 408B and 408MT machining centres are perfectly suited to abutment machining and are capable of ensuring auto-mated production.

Full Control of Machining ProcessComplete machining from bar stock or individual parts as- �

sured in a single cycle by means of back-working deviceBack-working with special collets for internal or external �

clamping of partsultra-precise clamping of all existing interfaces �

Machining strategy guaranteeing rapidity and high- �

quality surface finish of parts made of titanium, zircon (ceramic), etc.Specific equipment for ceramic machining: �

- improved isolation of machining area - oil-free - dust removal

Handling and conditioningBlanks and finished parts are loaded / unloaded by �

handling arm enabling high production autonomyparts are stored in numbered compartments outside �

the machining areaautomatic collet change with handling arm �

Back-working collet magazine management �

dental industry

Dental Abutment Machining

Machine perfectly suited to the �

machining of small complex parts

Controlled clamping of small parts �

Possibility of clamping all existing part �

interfaces

Automated back-working collet on �

pallet change management

abutment machining on a axis

Rear side machining on back-working device

Development of turnkey projects including machining programme, tooling, part clamping concept �

Programming recommendations and support �

Machining tests conducted on the basis of job specifications �

Design and development of automation devices adapted to the machines and to job specifications �

Customer training provided in machine programming and operation �

Machines commissioned by highly skilled staff �

Customised after-sales service with hot-line �

Proposal of preventive maintenance contracts for machines according to their �

equipment

Study of finance schemes �

Turnkey Machining Solutionswillemin-Macodel offers a comprehensive range of services, from examination of part drawings through to machine installa-tion and commissioning on the customer’s premises.

Specific ApplicationsMachining of specific Materials

Ceramics: high spindle speed, perfect clamping control, �

dust extraction PEEK: specific chip processing, part clamping suited to �

material, improved isolation of machining areaTitanium: high spindle torque, cutting tool control �

Marking of medical partsautomatic setting of markers on peek parts �

Part ManagementParts are identified either by batches, or by part, by means �

of a bar code to fulfil the traceability requirements in some industries

408b / 408mt ApplicationMedical / DentalCervical plate

surgical instruments

Casing ring

Watch Industryexterior

Micro-mechanical

Bone screw abutment

watch case

JewelleryJewels with specific shapes

wedding rings

swissMade

10

pom

zed.

ch

1840

2450

1385

1200 20

40

R 900R 750

R 31

0

850mm

Subj

ect

to m

odifi

cati

ons

09.2

009

General DataVoltage: 3 x 400 V / 50hz �

Installed power 408B: 9 kVa / 25 a �

Installed power 408MT: 16 kVa / 25 a �

air pressure: 6 bar �

air consumption: ~ 150 l/min �

net weight: 1’700 kg �

Technical SpecificationsLayout in mm

Route de la Communance 59Ch-2800 delémontTel. +41 (0)32 427 03 03fax +41 (0)32 426 55 30sales@willemin-macodel.comwww.willemin-macodel.com

layout with handling arm

5-7 axis bar fed machining centres with back-working devices

Capacities Travels and X – Y – Z - U 250 / 200 / 300 / 80 mm movements A – B - W 360° / 115° / 360°

Feed and forces Rapid feed 30 m/min

Thrust 2’600 n

axes drives aC motors

Resolution 0.0001 mm (0.1µm)

Spindle with built-in Tool taper hsk-e40motor power s1 / s6 10 / 15 kw

Torque s1 / s6 8 / 12 nm

speed 500 – 30’000 rpm

B axis Movement -15° to +100°

Resolution 0,0001°

nominal torque 180 nm

holding brake (hydraulic) 500 nm

Max. rotation speed (g0) 20 rpm

A axis - milling mode Movement 360°

Resolution 0,001°

Torque s1 / s6 (408MT) 9 / 29 nm

Max. torque (408B) 250 nm

holding brake (hydraulic) 130 nm

speed 100 rpm

spindle taper interface a4

408MT: A axis - turning Max. speed 6’000 rpmmode power s1 / s6 1.5 / 3.7 kw

Ø through bore Max. Ø 32 mm

Clamping system f27, f35, f48, w31.75, Ottet collets, Mecatool gps70 (A axis) pallet, various collets for internal and external clamping

Tool magazine number of tools 24

Indexed positions in magazine 5 (408B); 10 (408MT)

Max. tool Ø 50 mm

Max. tool Ø 63 mm (with 2 free positions)

Max. tool length 95 mm

Tool change time 0.8 s

Chip-to-chip ~3 s

Coolant Chips tray 0.03 m3

Tank capacity 80 l

Pump flow 40 l/min

pressure 2.5 bar

Lubrication Central lubrication pressure 25 bar

lubricant 2,7 l

Hydraulic group nominal pressure 100 bar

Numerical control fanuC 31i-a5

Options:Motor spindle speed: 42,000 rpm �

Motor spindle orientation control (option 408B, standard 408MT) �

Back-working device on rail with 0-90° unit with 2 positions �

Vice or collet for back-working machining �

hydraulic divider locking by differential pressure (408MT) �

Through bore � Ø up to 36 mm (408MT), 40 mm (408B)48 position tool magazine �

Tool breaking detection / tool measurement �

dimensional parts measurement �

B axis angular movement-25° at +100° �

high-pressure cooling through spindle �

Thermostabilisation of cutting liquid and mechanical cabinet �(option 408B, standard 408MT)filtration systems �

Chip conveyor �

Micro-pulverisation �

Various bar feed systems and bar magazines �

Various automatic part loading and unloading systems �

1490(24 tools)

1692(48 tools)

6360 (bar stock 3 m)