G520F

Machining center for frame structure and chassis parts

The GROB G520F machine concept guarantees customers in the automotive industry flexible and precise 5-axis machining of frame structure and chassis parts, as well as battery housings.

As a stand-alone system or machining center linked to other machines, the two-spindle G520F is able to cut two parts in parallel in the shortest time possible – high dynamics and ideal chip transport included.

Automotive

Technical data

Working travels

750/840/785

in X-/Y'-/Z-axis (mm)

Max. speeds

70/60/90

in X-/Y'-/Z-axis (m/min)

Interference diameter

2x798

(mm)

All technical data

Chip-to-chip time t₁

2.6

according to VDI 2852 (s) relative to speed (rpm)

Positioning accuracy

0.01

in X-/Y‘-/Z-axis (mm)

Table diameter

512

(mm)

Table load

2x525/2x625

mit/ohne Palette (kg)

Total weight

26,000/30,500

without/with pallet changer (kg)

The benefits at a glance

Best chip fall

High dynamics

High manufacturing flexibility

High machining accuracy

Customer-specific part loading

As a stand-alone machine or linked in the system

Suitable for MQL machining operations

Short chip-to-chip times

Machine concept

Axis arrangement

The axis combination is based on the tried and proven G-series GROB machine concept with horizontal spindle position and guarantees free chip fall and optimized heat dissipation.

Modular configuration

The modular and standardized machine components guarantee the best possible GROB product quality.

Individual automation

Available with manual or automatic front loading or automatic top loading, and optionally with integrated pallet changer.

Two spindles

Two-spindle machine for machining two parts in parallel.

Technology down to the finest detail

Chip disposal

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

Horizontal motorized spindle

For meeting the toughest cutting requirements

Electrical cabinet

Optimized access and simple orientation for preventive maintenance and inspection

Control system

Latest machine control systems from SIEMENS and HEIDENHAIN available

Typical machining operations

Longitudinal beam

Dimensions of raw material (mm)	-
Industry	Automotive
Material	Aluminium alloy
Motorized spindle	18,000 rpm
Power/torque	26 kW/34 Nm

Suspension strut domes

Dimensions of raw material (mm)	540x410x320
Industry	Automotive
Material	Aluminium
Motorized spindle	18,000 rpm
Power/torque	29 kW/34.6 Nm

Shock bracket

Dimensions of raw material (mm)	940x490x480
Industry	Automotive
Material	Aluminium
Motorized spindle	18,000 rpm
Power/torque	29 kW/34.6 Nm

Suspension

Dimensions of raw material (mm)	330x250x100
Industry	Automotive
Material	Aluminium
Motorized spindle	16,000 rpm
Power/torque	32 kW/206 Nm

Steering box

Dimensions of raw material (mm)	550x155x100
Industry	Automotive
Material	Aluminium
Motorized spindle	18,000 rpm
Power/torque	39 kW/46 Nm

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 G520F and have optimized quality features.

Motorized spindle versions

HSK-A63, 47 Nm, 12,000 rpm (standard)
HSK-A63, 47 Nm, 18,000 rpm (option)
HSK-A63, 83 Nm, 12,000 rpm (option)

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

The single-disk magazine of the G520F achieves fast chip-to-chip times, requires only a small footprint and allows optimum access.

Control systems

Choose between modern and powerful CNC control systems from market leaders for the G520F.

SIEMENS 840D sl

HEIDENHAIN TNC 640

Automation solutions

Draw on the experience we have garnered over several decades and benefit from the automation technology we tailor to meet your needs.

2-way/4-way pallet changer system

Use the GROB pallet changer system to increase your productivity by retooling during machining time.

Pallets are interchanged between setup station and work area by means of a rotating pallet changer. A high degree of process reliability during the pallet change sequence is guaranteed by an integrated seating check system and by flushing the zero point system.

2-way/4-way pallet changer system

Benefits:

Loading and unloading of the parts to the machine setup station during the machining operation
2-/4-way pallet changer system compactly integrated into the machine
Optimum accessibility to the 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

Loading systems

The G520F is designed for efficient work area loading. All loading devices are GROB proprietary developments, and so the individual components are guaranteed to be optimally matched.

Loading systems

Top loading:

Agile loading gantry
Cartesian linear gantry
Cartesian linear gantry with telescope

Front loading:

Automatic sliding changer
Swiveling changer

Transportation and automation components

Together with the GROB automation system, the transport and automation components create a module from which complex automation systems can be combined. The high degree of standardization ensures the best possible price/performance ratio and a high degree of technical optimization.

Transportation and automation components

Automation system
Lifts
Swivel conveyors
Rotary tables
Lift transverse units
Swivel units
Storage systems
SPC stations

Accessories

Our extensive range of accessories makes the G520F more flexible, while increasing your own productivity and economy at the same time.

GROB⁴Track

GROB-NET⁴Industry application for monitoring the machine's state and the resultant plannability of preventive maintenance work

Continuous cooler

An external continuous cooler for cooling the cutting fluid
Available for all high-pressure cutting fluid pumps

Camera systems

Camera solutions for industrial automation and for inspection tasks
Consisting of individual components such as lenses, lighting units, image sensors and software

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

Emulsion mist separator with the option to realize an integrated pre-separator stage, a regenerative filtration stage and an integrated post-filter stage with controllable suction power

Oil skimmer

The oil skimmer removes hydraulic and lubricating oil from the cutting fluid surface to keep the cutting fluid as clean as possible.

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

Allows data to flow between tool and machine control
Shorter tooling times
Write-read unit for tools with tool coding
Errors when inputting the tool data avoided

Laser measurement system for milling tools

Contactless, optical tool monitoring/measurement of rotating tools, such as milling cutters and drills.

Electromechanical tool breakage detection device

Tool breakage detection via a tactile tool breakage detection device
Monitoring during machining

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

For aligning and measuring parts or clamping fixtures, as well as for setting zero and reference points for downstream machining operations.