ROGRIND MD Head
13.49 Recuts joint profiles smoothly and accurately. For a better grinding pattern in less time.
Please check the product sheet () for further information and accessories.
|Type||Brushless DC motor|
|Peak power||7 kW|
|Max. permissible circumferential speed||~50 m/s m/s|
|Cup wheel||150 mm|
|Grinding disc speed||~5000 rpm rpm|
|Roller spacing||1000 mm|
|Infeed depth of grinding spindle||electrical mm|
|Weight outrigger||~8.5 kg kg|
|Lenght without/ with telescopic handle||1750 / 1950 mm|
|Weidth without/ with telescopic handle||410 / 460 mm|
How does digitally controlled grinding work?
Finishing is achieved by a method patented by Robel:
How does rail grinding benefit from the hybrid drive?
What are the components of ROBEL's patented hybrid energy chain?
The combustion engine in the machine is replaced by an enclosed brushless DC motor which, owing to its neodymium solenoids, is very small and provides a much higher power density than a combustion engine or a conventional asynchronous electric motor.
Thus, ROGRIND HF's energy chain comprises:
and in the machine:
The petrol engine runs at some distance from the grinder, i.e. at the other end of the spark-proof drop cable where a separate, portable unit (Power Pack 70.02 made up of motor, generator and Supercap) is located. Due to its lower rating, the motor is subject to fewer load variations which makes its work more efficient at lower fuel consumption.
Thus, the new drive solution protects the combustion engine from grinding dust and the operator from exhaust fumes and noise. The greatest advantage, though, is the reduced weight and the ensuing ergonomic plus: considering that you have to carry them to the site, place them on the track or lift them, two time 50 kg are less than one time 100 kg.
How is the Supercap technology used for grinding?
When grinding a joint, the grindstone revolves at a constant speed while the machine permanently moves forward and backward. All force and power go into the grinding action. Although the machine runs at full throttle when the direction of motion turns from feed to return stroke, the grindstone as such hardly needs any power at all.
Up to now, the energy supplied by the combustion engine at that time was lost. With the new hybrid technique, the excessive energy is collected and stored via the generator directly in compact electrolytic capacitors (Supercaps).
As opposed to batteries, the Supercaps work at any ambient temperature down to -30° while boasting a service life of about 10 years. This efficient energy storage cell combines with a BLDC motor which allows the extra boost of energy to be output to the rail.
The result: in order to optimise the work output without losing any of the grinding power, you now just need a GX200 engine which is 9 kg lighter than the previous GX270.
Hybrid Rail Head Profile Grinding Machine