At EMO Monzesi presents the RV2 450 series vertical grinding machine with counterposed grindstones from the Viotto Line. This model completes the range of products and responds primarily to the needs of subcontractors in the automotive sector.

On occasion of EMO 2017, Monzesi introduces, for the first time ever, its new RV2 450 MI model of vertical grinding machine with counterposed grindstones from the Viotto Line. With a modern design that adopts the latest technological innovations, like for example electrospindles on the two heads and the regulation of the guard plates via CNC, this machine can be fitted with 350 or 450 mm grindstones and is the solution that best responds to the demands of specific markets like that of subcontractors or of the automotive industry. The RV2 450 is a smaller version and completes Monzesi’s range of vertical grinding machines with counterposed grindstones, the other versions of which are the 500/610 and the 760/915. In general a grinding machine with counterposed grindstones is thought to be a bulky machine for which an operator requires a footplate in order to perform operations. The machines from the Viotto Line have now solved this problem thanks to their more compact volume (which has not negatively impacted their sturdiness, yet makes it possible to optimise spaces), their ergonomic design, and their ease of use.

Electrospindles and Motorisation

The use of electrospindles, designed entirely within the company, ensures strength, rigidity, and heightened precision during machining operations. In fact, the electrospindle is supported by oblique contact ball bearings with the option of regulating the speed of the spindle itself infinitely in either direction. Furthermore, the spindle’s guides are prismatic or combined depending on the type of machine, its heads are moved by ball screws, and it uses a mechanical counterweight system. The recent design and the new machine bed of the Viotto Line are highly ergonomic. The overall dimensions of the machine are reduced while the use of a footplate by the operator is no longer necessary, thus exponentially reducing change over time, a solution that meets the needs of subcontractors. All of the axles of the grinding machine with counterposed grindstones are moved by brushless motors, directly connected to the axles by ball screws, and therefore without the use of pulleys or belts.
The guard plates, which guide the piece as it enters and exits, can be regulated via a CNC.

Setting and Dressing

The setting of the machines has been simplified considerably thanks to a new intuitive software and the electronic management of work channels: access to the work area is granted via the opening of the front fixture bed, and accessibility of the machine and, therefore, substitution of the grinding wheel, is extremely fast with the sliding support. The software, this too designed by Monzesi, features a simple and intuitive design, a CAD/CAM packet for the profiling of the grinding wheel, an amplifier for checking contact, and a Teleservice system. All of this ensures rapid tuning of the machine and fast production changes. Lastly, the redesigned grinding wheel dresser makes it possible for the machines to quickly re-adapt to dressing needs (fixed head with diamonds, rotating spindle with diamond disc, or conventional abrasive grinding wheel). The universal dresser system provides the option of dressing both grinding wheels at the same time or separately, with an automatic or interpolated cycle, thanks to the structure which is electro-welded to the machine bed and perfectly aligned with the grinding wheels, the cart movement on preloaded skids, and the ball screws managed by brushless motors controlled by CNC. The three versions (conventional grinding wheel, diamond disc, and diamond) are interchangeable on the same dresser.