VTC VERTICAL TURNINGCENTRES

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V T C V E R T I C A L T U R N I N G C E N T R E S

DANOBATGROUP is one of the largest machine tools and production systems manufacturers in Europe. For more than 55 years we have supplied machine tools and production systems to highly reputable customers establishing a worldwide presence.

DANOBATGROUP is the machine tool division of one of the most prestigious Spanish industrial holdings, Mondragon Corporation with a workforce of 85,000 people, and more than 13.000 milion Euros in turnover.

The VTC range has been designed to create new high standards of turning and machining capability for users in the most demanding industries.

Proven performances in combining turning, milling, drilling and grinding operations with high precision and mass productivity have created an important position for the VTC range in the following industries: aerospace, railways, power generation, marine, large precision bearings, mining, valves and subcontracting.

VERTICAL TURNING CENTRES

preCision

VTC VERTICAL TURNING CENTRES

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The VTC machines are extremely rigid. The main elements of the machine such as the base, the column/columns and the cross rail are ribbed castings providing a high degree of stability to the machine assembly. They are fully stress relieved prior to final machining to enable the machine’s structure to absorb the stresses and dampen the vibrations induced by cutting forces even under the heaviest cutting conditions. The RAM is made from a normalised steel forging, induction hardened and precision ground.

The main spindle is driven from the motor through a two-speed “epicicloidal” gearbox. From this, the drive to the spindle is provided through a gear reduction transmission.

A pressurised re-circulating oil lubrication system ensures adequate lubrication for the main spindle gearbox and the table bearing. Additionally and to ensure thermal stability and minimise table thermal growth, an oil chiller unit is also provided.

The C axis positioning and repeatability, produces extremely high accurate parts during milling and drilling operations.

The positioning of the tool holders and milling heads into the RAM is made by means of a Hirth gear system. This system guarantees the accuracy and repeatability during the tool change.

The rotary tools are assembled into the milling heads, straight or angular, at 90º, providing an extremely rigid assembly. This results in high accuracy drilling, threading and milling operations.

CONFIGURATION OF THE MACHINE VTC

High precision, multifunction machine

LATEST STATE OF THE ART TECHNOLOGY

VTC accuracyThe VTC range is optimised to achieve excellent machining results regarding dimension accuracy and surface finish performing the best results for X, Z and C axes positioning and reducing deformations due to thermal expansion.

Thermal expansionThe machines design and their structural cast iron components, enable a high thermal stability face to temperature changes caused by the main motor, ram motor, etc. During every machine test, we check that those thermal expansions do not affect the quality of the machining.

DANOBAT has developed the VTC-H range in order to meet the market demand for the large diameter Vertical Turning Centres.

Hydrostatic technology has been applied in the following areas of the machine:

· Hydrostatic slideways are used in both the X and Z axes.

· The table is supported radially and axially by hydrostatic elements.

Multifunction machineCombining turning, milling, drilling, grinding and special measuring devices in a single machine tool has generated considerable interest in DANOBAT’s VTC range. DANOBAT has also designed and manufactured several special new heads/spindles for customised applications, such as head with Y axis and head with B axis.

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V T C V E R T I C A L T U R N I N G C E N T R E S

VTC 1600/1800/2100/2500/2800/3200/4000

TABLE X AND Z AXES

The rotary table is directly mounted on a high precision crossed roller bearing. The DANOBAT design enables highest accuracy and rigidity for hard vertical turning operations. The main crossed roller bearing is assembled one by one based on DANOBAT expertise in this field.

The slide ways design is based on roller guidance system for both X and Z axes. These DANOBAT designs enable the maximum rigidity avoiding any stick slip effect and improving interpolation results.VTC-1600 and VTC-1800 range is developed with transmission movement by ballscrews.VTC-2100 and larger models are developed with double rack and pinion system instead of a ballscrew one. This rack and pinion system used by DANOBAT, eliminates any positioning error due to possible deformations of long ballscrews. The RAM design optimises thermal expansion and provides the maximum rigidity (in comparison to other RAM types, such as the octogonal one). The vibration and dampening mechanism developed by DANOBAT is fully integrated with the slideways and optimised to give the best turning results.

Due to the DANOBAT described design, the VTC range is optimised to give excellent turning results regarding dimension accuracy and surface finish, performing the best results for X, Z and C axes positioning and checked with ball bar and NAS tests.

ACCURACY RESULTS

LEADING TECHNOLOGY:

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VTC-H 5000-H/6000-H/8000-H

ACCURACY RESULTS

The VTC-H range optimise the turning results regarding dimension accuracy and surface finish for heavy parts, up to 150 Tn due to the DANOBAT described design, These designs enable DANOBAT to increase this capacity to larger parts, weights and dimensions.

TABLE

The table is directly mounted on a hydrostatic bearing system. DANOBAT offers different range of hydrostatic bearing systems depending on the axial load as well as the peripheral speed requested case by case. DANOBAT designs cover cases from a single hydrostatic axial bearing system to double / triple systems. Additionally DANOBAT developments ensures an easy maintenance of hydrostatic systems.

TRAVERSE

The DANOBAT designed traverse mechanism optimises the possible deformation of this particular element of the VTC, heart of the machine. Different mechanisms compensate the deformation of the traverse due to the gravity effect. Firstly, the finite element calculation of the traverse, with its own weight compensation system reduces deformations. Secondly, the DANOBAT designed weight compensation actuators reduce the geometrical errors produced due to the gravity.

X AND Z AXES

The slideways design is based on full hydrostatic system for both X and Z axes. These DANOBAT designs enable the maximum rigidity for heavy turning work.The transmission system is developed with double rack and pinion system. This double system eliminates any positioning error due to the backlash and long ballscrew deformations.The RAM design optimises thermal expansion and provides the maximum rigidity (in comparison to other RAM types, such as the octogonal one). DANOBAT implements a full hydrostatic mechanism for the slideways offering maximum rigidity and vibration dampening.

LEADING TECHNOLOGY:

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V T C V E R T I C A L T U R N I N G C E N T R E S

CUSTOMISED SPINDLES

Tool holders for modular tools: Capto, KM... part probing system

ATC (Automatic Tool Changer)

straight and 90º milling heads for live tools

Tool presetting system

EQUIPMENT

standard

· CNC: Fanuc / Siemens / Fagor

· ‘T’ slotted table

· Automatic tool changer (18 tools)

· Fixed cross rail

· Hydraulic equipment

· Levelling pads

· Automatic lubrication equipment

· Coolant through spindle

options

· Hydraulic chuck

· Moving cross rail

· Live spindle

· C axis

· Two RAM models for maximum metal removal

· Straight and 90º milling heads for live tools

· Grinding head

· Automatic tool changers up to 120 tools

· Tool presetting system

· Part probing system

· Tool force monitoring and tool breakage detection

· Paper filter

· Full enclosure and fumes extractor

· Automatic pallet loading system

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CHArACTerisTiCs VTC-1600 VTC-1800 VTC-2100 VTC-2500 VTC-2800

Table diameter mm 1400 1600 1800 2100 2400

Turning diameter mm 1600 1800 2100 2500 2800

Table speed rpm 400 360 320 260 200

Table drive motor kW 55 (81)(105) 55 (81)(105) 55 (81)(105) 55 (81)(105) 55 (81)(105)

Max. work piece weight kg 9000 12000 17000 20000 25000

RAM size mm 250 x 250 250 x 250 250 x 250 250 x 250 250 x 250

RAM stroke “Z” mm 1000 (1500) 1000 (1500) 1500 1500 1500

Maximum height table to RAM mm 1500 (2000) 1500 (2000) 1800 (2600) 1800 (2600) 1800 (2600)

RAM traverse “X” mm 1950 2150 2470 2870 3330

Vertical travel of cross rail mm 800 800 800 800 800

Live spindle power kW 22 (30) 22 (30) 22 (30)(37)(40) 22 (30)(37)(40) 22 (30)(37)(40)

Live spindle speed rpm 3000 3000 3000 3000 3000

Standard ATC tool 18 (2 x 18) 18 (2 x 18) 18 (2 x 18) 18 (2 x 18) 18 (2 x 18)

Approx. weight kg 40000 45000 55000 70000 80000

CHArACTerisTiCs VTC-3200 VTC-4000 VTC-5000-H VTC-6000-H VTC-8000-H

Table diameter mm 2800 3500 4000 5000 7000

Turning diameter mm 3200 4000 5000 6000 8000

Table speed rpm 175 100 60 60 35

Table drive motor kW 55 (81)(105) 55 (81)(105) 48 x 2 (71 x 2) (105 x 2)

48 x 2 (71 x 2) (105 x 2)

48 x 2 (71 x 2) (105 x 2)

Max. work piece weight kg 30000 50000 80000 100000 150000

RAM size mm 250 x 250 250 x 250 250 x 250 (300 x 300)

300 x 300 (400 x 400)

300 x 300 (400 x 400)

RAM stroke “Z” mm 1500 1500 1500 (2000) 2000 (2500) 2000 (2500)

Maximum height table to RAM mm 1800 (2600) 2000 (3000) 3250 (3600) 3600 (4650) 4650 (6200)

RAM traverse “X” mm 3730 4600 5600 6600 8800

Vertical travel of cross rail mm 800 1000 2000 2000(3500) 2000 (3500)

Live spindle power kW 22 (30)(37)(40) 22 (30)(37)(40) 30 (37)(40) 37 (40) 37 (40)

Live spindle speed rpm 3000 3000 3000 (2000) 2000 (1500) 2000 (1500)

Standard ATC tool 18 (2 x 18) 18 (2 x 18) 18 (2 x 18) 18 (2 x 18) 18 (2 x 18)

Approx. weight kg 90000 120000 150000 180000 220000

TECHNICAL SPECIFICATIONS VTC

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V T C V E R T I C A L T U R N I N G C E N T R E S

ring turning / milling / drilling rotor turning

ring turning / grinding Mechanical industry part turning / milling

Generator housing turning / drilling / milling

VTC

propeller machining

FLeXiBiLiTY: TURNING, MILLING, GRINDING, DRILLING, MEASURING

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railway wheel turning Motor housing turning / drilling

Gear turning Aerospace motor compressor turning / grinding / measuring

VTC Vertical turning centres

MoRe infoRMATion AbouT DAnobAT VTC VeRTiCAL TuRninG CenTReS AT www.danobatgroup.comIf your mobile phone has the QR code reader tool you will be able to go directly to our site at www.danobatgroup.com

DAnoBATArriaga kalea, 21E-20870 ELGOIBAR (Gipuzkoa) Spain

Tel.: + 34 943 74 80 44Fax: + 34 943 74 31 38sales@danobat.comwww.danobatgroup.com

OUR COMPANY, YOUR PARTNER

project management:

Together during the complete machine live:

· Technical assistance by local service engineers.

· Teleservice.

· Hotline.· Preventive maintenance.· Spare parts available.

· Machine set-up & commissioning.· Personnel training.· Production assistance.

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SPECIALIZED MULTI-TECHNOLOGICAL SOLUTIONS

Grinding machines Band sawing machines and drilling units

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· Local sales service team at your disposal.· Production process analysis by local product engineers.· Feasibility analysis.· Technical & economical study.

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next to the customer from the beginning:

Customised solutions:

In DANOBAT we offer a service to perform a machining test on our machines with your workpieces. You can check the capacity of our process team and DANOBAT machines, thus making an investment with a guarantee.