G750 : GROB-WERKE GmbH & Co. KG

G750

5-axis universal machining center
The G750 5-axis universal machining center offers customers in industrial manufacturing top notch results when it comes to milling large parts.
The G750 machining center is suitable for practically every material and boasts convincing flexibility in various sectors.
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Aerospace
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Mechanical engineering
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Automotive
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Energy technology
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Die and Mold Industries
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
3.4
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)
Total weight
37,000/43,000
without/with pallet changer (kg)
Tool length for single disk-type tool magazine
650
HSK-A63 (mm)
Tool length for double disk-type tool magazine
650/500
HSK-A63 (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, as well as 5-axis simultaneous interpolation, with a swivel range of 230 degrees in the A'-axis and 360 degrees in the B'-axis.

GROB state-of-the-art technology
Disk-type tool magazine

Fast tool change through an intelligent magazine to motorized spindle arrangement

Horizontal motorized spindle

For meeting the toughest cutting requirements

Tilting rotary table

Almost limitless machining potentials thanks to the largest possible swivel range

Chip disposal

Uninterrupted part machining with chip disposal by a scraper-type conveyor

Machine bed

Intrinsically stiff welded design for optimum machine rigidity

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Disk-type tool magazine

Fast tool change through an intelligent magazine to motorized spindle arrangement

2
Horizontal motorized spindle

For meeting the toughest cutting requirements

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Tilting rotary table

Almost limitless machining potentials thanks to the largest possible swivel range

4
Chip disposal

Uninterrupted part machining with chip disposal by a scraper-type conveyor

5
Machine bed

Intrinsically stiff welded design for optimum machine rigidity

G750 – Highly dynamic production
Watch our video to experience the manufacture of a structural component in the aerospace industry.
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
Suspension
Dimensions of raw material (mm)330x250x100
IndustryAutomotive
MaterialAluminium
Machining time68 minutes
Motorized spindle16,000 rpm
Power/torque32 kW/206 Nm
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
Pump housing
IndustryMechanical engineering
MaterialCast steel
Machining time18 minutes
Motorized spindle12,000 rpm
Power/torque52 kW/83 Nm
Die and Mold
Dimensions of raw material (mm)296x296x110
IndustryDie and Mold Industries
MaterialTool steel
Machining time7 hours
Motorized spindle30,000 rpm
Power/torque53 kW/63 Nm

Tilting rotary tables

Various tilting rotary table versions are available for the G750, depending on the requirement. The powerful rotary tables are based on the latest torque motor technology and offer optimized dynamics.

Tilting rotary tables A'-/B'-axis

Choose between tilting rotary tables with T-grooves arranged in parallel (standard),as well as tilting rotary tables with pallet clamping system (option).

Spindle versions

Besides the broad range of spindles, the motorized spindles designed and produced by GROB itself are the preferred choice for optimized process design. These are optimally matched to the G750 and have optimized quality features.

Motorized spindle versions
  • HSK-A63, 47 Nm, 12,000 rpm (standard)
  • HSK-A63, 83 Nm, 12,000 rpm
  • HSK-A63, 206 Nm, 16,000 rpm
  • HSK-A63, 47 Nm, 18,000 rpm
  • HSK-A63, 47 Nm, 21,000 rpm
  • HSK-A63, 63 Nm, 30,000 rpm
  • HSK-A100, 575 Nm, 9,000 rpm
  • HSK-A100, 340 Nm, 10,000 rpm
  • HSK-A100, 344 Nm, 6,000 rpm
Motorized spindle with cross-feed

The GROB motorized spindle with cross-feed allows complex internal and external contours to be manufactured with controllable tools. This spindle offers convincing system rigidity, high cutting speeds for machining contours and low tool costs. There are no additional interference contours on the motorized spindle and no need for referencing.

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.

GROB Chip-in-Spindle Detection System (SiS)

This system is able to detect at an early stage tool clamping faults caused by chips between the plain surface and the spindle nose from 10 μm. So the machining process is optimized and rejects and damage are avoided.

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.

Pallet changer system
Pallet changer system
  • Pallets are interchanged by means of a rotating pallet changer
  • Optimally-matched pallet clamping system fixes pallets on the rotary table and setup station in the machine
  • An integrated seating check system and flushing of the zero point clamping system guarantee high process reliability during the pallet change operation.
Pallet changer system

Benefits:

 

  • Loading and unloading of the parts to the machine setup station during the machining operation
  • Double pallet changer system compactly integrated into the machine
  • Optimized access to the rotatable and lockable setup station
  • Fast exchange of pallets between work area and setup station
  • Integrated seating check system for the pallets
  • Wide-opening setup station doors with crane loading capability
Customer-specific automation solution
Customer-specific automation solution

Compact pallet storage system

  • The compact pallet storage system offers even greater flexibility in the configuration of pallet storage positions, permits a mixed operation of differently sized pallets and considers the length of the parts.

 

Flexible manufacturing system

  • In the full version, both the tool flow and the part flow can be automated.

Software options

Use the GROB software solutions to optimize and analyze the machine kinematics of the G750 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 G750. 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 G750 (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.

    Accessories

    Our extensive range of accessories makes the G750 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 of a regenerative filtration stage with 2,000 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 milling tools
    Laser measurement system for milling tools
    • Contactless, optical tool monitoring/measurement of rotating tools, such as milling cutters and drills
    • Measurement and monitoring of tool length, tool diameter, tool breakage, tool wear and tool cutting edge status
    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
    • General equipment: Keys for selecting the axis directions, feed, rapid travel, emergency stop and for acknowledging axis movements
    • SIEMENS hand-held controller: Additional option for tool data input by connecting the controller to the tool loading station
    • HEIDENHAIN electronic handwheel or FANUC hand-held controller HMO panel: Compact controllers for a high degree of flexibility during setting up and tooling work
    Machine status lamp
    Machine status lamp
    • A three-color status lamp is used to visually indicate the machine status
    • A distinction is drawn between automatic mode (green), warning (yellow) and malfunction (red)
    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