G750T : GROB-WERKE GmbH & Co. KG

G750T

5-axis mill-turn universal machining center
The G750T mill-turn machining center is designed to machine large parts from the most diverse materials with incredible stability and precision down to the very last detail.
See for yourself the high productivity and outstanding quality of GROB mill-turn machines and employ the G750T to get the best out of your manufacturing facility.
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Aerospace
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Mechanical engineering
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Energy technology
Technical data
Working travels
1,000/1,100/1,170
in X-/Y'-/Z-axis (mm)
Max. speeds
60/50/75
in X-/Y'-/Z-axis (m/min)
Interference diameter
1,280
(mm)
All technical data
Chip-to-chip time t1
4.2
according to VDI 2852 (s) relative to speed (rpm)
Positioning accuracy
0.006
in X-/Y'-/Z-axis (mm)
Table diameter
950
(mm)
Table load
1,000/1,500
with/without pallet (kg)
B'-axis speed
500
n(minmax)
Total weight
37,000
(kg)
Tool length for double disk-type tool magazine
650/500
(front/back) (mm)
The benefits at a glance
checkboxHigh productivity
checkboxOptimized availability
checkboxHigh visibility
checkboxFlexible applications
checkboxMaintainable
checkboxCompact design
checkboxOptimized access
checkboxRound-the-clock service
Unique machine concept
Horizontal spindle position

The horizontal spindle position permits the longest possible Z-travel path and optimum chip fall.

Maximum stability

The unique arrangement of the three linear axes minimizes the distance between the guides and the machining point (TCP), lending the machine considerable stability.

Tunnel concept

The tunnel concept allows the largest possible component – even in the case of with extremely long tools – to be swiveled and machined within the work area without collision.

Large swivel range

Three linear and two rotary axes permit 5-sided machining, 5-axis simultaneous interpolation as well as GROB TRAORI turning. With a swivel range of 230 degrees in the A'-axis and 360 degrees in the B'-axis, these machines offer the greatest possible positioning flexibility.

GROB state-of-the-art technology
Horizontal 5-axis concept

Three linear and two rotary axes permit 5-sided simultaneous machining

Mill-turn table

Almost limitless machining potentials thanks to the largest possible swivel range

Chip disposal

Uninterrupted part machining with chip disposal by a slat band conveyor

Machine bed

Intrinsically stiff welded design for optimum machine rigidity

Disk-type tool magazine

Fast tool change through an intelligent magazine to motorized spindle arrangement

1
Horizontal 5-axis concept

Three linear and two rotary axes permit 5-sided simultaneous machining

2
Mill-turn table

Almost limitless machining potentials thanks to the largest possible swivel range

3
Chip disposal

Uninterrupted part machining with chip disposal by a slat band conveyor

4
Machine bed

Intrinsically stiff welded design for optimum machine rigidity

5
Disk-type tool magazine

Fast tool change through an intelligent magazine to motorized spindle arrangement

G750T – Perfect machining of large parts
Our G750T mill-turn machining center in action.
Typical machining operations
Structural component
Dimensions of raw material (mm)380x70x120
IndustryAerospace
MaterialAluminium
Machining time40 minutes
Motorized spindle16,000 rpm
Power/torque32 kW/206 Nm
Lever
Dimensions of raw material (mm)Cast blank
IndustryMechanical engineering
MaterialGG25
Motorized spindle10,000 rpm
Power/torque-
Francis turbine wheel
Dimensions of raw material (mm)Ø 800x250
IndustryEnergy technology
MaterialChromium-nickel steel 
Machining time96 hours
Motorized spindle10,000 rpm
Power/torque66 kW/340 Nm

Mill-turn tables

To provide you with the best possible support for meeting the requirements of your mill-turn operations, GROB offers tables, optimized specifically for mill-turn operations, with significantly higher maximum speeds than pure universal milling machining centers.

Mill-turn table T-slots arranged in a star shape (standard)
Mill-turn table T-slots arranged in a star shape (standard)
Mill-turn table with pallet clamping system (option)
Mill-turn table with pallet clamping system (option)

Spindle versions

To optimize the process design of your mill-turn operations, GROB offers mill-turn motorized spindles developed specifically for this purpose.

Motorized spindle versions
  • 206 Nm, 16,000 rpm
  • 340 Nm, 10,000 rpm
  • 261 Nm, 15,000 rpm
GROB Spindle Diagnostics (GSD)

GROB spindle diagnostics is a system that automatically monitors the condition of the motorized spindle. Benefits are a prolonged motorized spindle useful life, reduced tool wear and scheduled maintenance.

Tool magazine

GROB tool magazine technology is set apart by fast chip-to-chip times, a smaller space requirement and optimized accessibility. Choose the right solution for you.

Additional tool magazine
Additional tool magazine
Single disk-type tool magazine
Single disk-type tool magazine
Double disk-type tool magazine
Double disk-type tool magazine

Automation solutions

Draw on the experience we have garnered over several decades and benefit from the automation technology we tailor to meet your needs – from solutions with part storage systems to highly flexible manufacturing lines.

 

Customer-specific automation solution

The tougher requirements in the automation sector call for individual solutions tailored to the customer's specific needs. GROB offers such solutions, from customized part handling through to flexible manufacturing lines with multiple machines and centralized tool supply.

Software options

Use the GROB software solutions to optimize and analyze the machine kinematics of the G750T and minimize deviations down to the finest detail.

GROB swivel axis calibration (GSC)
GROB swivel axis calibration (GSC)

For highly precise machine calibration and control-specific kinematic cycles. The GSC achieves a much higher level of accuracy than standard calibration cycles without using swivel cycles.

GROB kinematic measurement inspection equipment set
GROB kinematic measurement inspection equipment set

In addition to the kinematic measuring cycles, all measuring instruments are supplied in an inspection equipment set.

Interpolation turning PLUS
Interpolation turning PLUS

The interpolation turning PLUS software solution enables any turning operations on the G750T. Because both new and standard tools can be used, it remains economical at all times and is the ideal solution for prototype and small series production.

Energy efficiency package
Energy efficiency package

For efficient use of energy by reducing the power consumption of the G750T (with SIEMENS control system).

Gear hobbing
Gear hobbing

For individual corrections and block entry at any cut, gear hobbing is a suitable process for external gearing and gearing on shafts.

Power skiving
Power skiving

For perfect external and internal gearing with power skiving machines. Frontal part access required for hob peeling.

GROB TRAORI turning
GROB TRAORI turning

GROB TRAORI turning leads to a dynamic alignment of the tool cutting edge to the contour of the turned part in consideration of tool length and tool radius. Consequently, a significantly longer service life is achieved and short tools can be used.

Accessories

Our extensive range of accessories makes the G750T more flexible, while increasing your own productivity and economy at the same time.

High-pressure cutting fluid system
High-pressure cutting fluid system
  • Standard version: 23 bar high-pressure cutting fluid pump, including On/Off functionality
  • Additional versions for higher pressure requirements: 5–38 bar/10–80 bar high-pressure cutting fluid pump
  • Option of an additional cooling unit for all high-pressure cutting fluid systems
Decentralized work area mist collecting system
Decentralized work area mist collecting system

Emulsion mist separator with the option to realize an integrated pre-separator stage, a regenerative filtration stage and an integrated post-filter stage with 800 m³/h of controllable suction power.

Oil skimmer
Oil skimmer

The oil skimmer removes hydraulic and lubricating oil from the cutting fluid surface to keep the cutting fluid as clean as possible. The oil skimmer comprises a belt drive, a wiper and a collecting vessel with level switch.

Tool cleaning device
Tool cleaning device
  • Brushing and air cleaning of the conical and flat surfaces of the tool interface during the machining operation
  • Combined and patented GROB brushing/blow-off device
Tool coding
Tool coding
  • Allows data to flow between tool and machine control system
  • Shorter tooling times
  • Write-read unit for tools with tool coding
  • Errors when inputting the tool data avoided
Laser measurement system for mill-turn tools
Laser measurement system for mill-turn tools
  • Mechanical tool measurement of turning tools
  • Contactless, optical tool monitoring/measurement of rotating tools, such as milling cutters and drills
  • Measurement and monitoring of tool length, diameter, breakage, wear and cutting edge condition
Electromechanical tool breakage detection device
Electromechanical tool breakage detection device
  • Tool breakage detection via a tactile tool breakage detection device
  • Monitoring during machining
  • Tool breakage detection possible from a length of 100 mm
Hand-held controllers
Hand-held controllers

Additional option for tool data input by connecting the controller to the tool loading station

Touch probe
Touch probe
  • Aligning and measuring parts or clamping fixtures, setting zero and reference points for downstream machining and for machine kinematics measurement
  • Touch probe including data transmission via infrared or radio
  • Non-machining time for tooling and measuring reduced
  • Higher achievable part accuracy
GROB Service
Customer service

GROB Group
Phone:  +49 (8261) 996-777
E-mail:   info.service@grob.de