Vgrind takes centre stage at Vollmer event2 July 2019
Vollmer used its VDays event at its world headquarters in Biberach, Germany to present its latest Vgrind 360E to over 400 customers from around the globe.
Introducing the new machine, Andreas Weidenauer, the business development manager for the Vgrind 360 and Vgrind 360E, discussed the benefits of the Vgrind machine that can process tools up to 100mm diameter with a length of 360mm. The presentation included an overview of the build quality that touched on the polymer concrete machine base for vibration absorption and reduced thermal expansion. With extremely low thermal conductivity, the Vgrind 360E generates less thermal expansion throughout its robust 2,100kg base.
Upon this base is the C-axis concept that provides the perfect absorption and elimination of deformation and vibration of grinding pressure through the top and bottom bearings in the twin grinding spindle configuration. The twin spindle configuration in the Vgrind 360E is unique to Vollmer and it demonstrates how its dynamics, precision, deformation and vibration dampening characteristics far exceed that of single-spindle machines.
The C and A-axis have both been configured with direct drive torque motors to improve the dynamics of the Vgrind 360E. The A-axis spindle rotates at a speed of 450rpm as standard with an optional 1000rpm unit for specialist applications. The upper spindle of the Vgrind 360E has a belt driven spindle with 9kW peak power and a maximum speed of 6500rpm whilst the bottom belt driven spindle generates 23kW of peak power with a maximum speed of 10,500rpm. This cost-effective configuration delivers sufficient power, speed and torque to meet the most demanding of tasks. However, for cutting tool manufacturers looking for more flexibility, the Vgrind 360 offers three solutions that include both upper and lower belt or motorised spindle driven motors or the facility to have one belt and one motorised spindle on the machine.