Meccanica Nova designs and
manufactures flexible CNC Grinding Systems that feature
excellent accessibility for quick change-over, serviceability
and maximum up-time... while providing the rigidity required
for the most demanding grinding applications. Meccanica
Nova is a Champion of Through-Put. Environmental protection and operator
safety to EEC standards also are key in our designs, as well as
space saving and ergonomic layouts. Our product offering includes
and Constant Velocity Joint
Internal grinding can be the most technically challenging area
in manufacturing today. Small parts with tight tolerances in
large quantities require machines designed correctly from the
base up. Meccanica Nova builds machines with the power and
rigidity required to utilize the most advanced abrasives
available today. Workpart holding, wheel dressing and gauging
systems are all combined to provide the highest productivity
day in and day out. Computer Numerical Control give users
precision to a millionth of an inch, as well as the ability to
change from one part to another in just minutes.
Nova internal grinders are used in all parts of the
world to make small parts, such as bearings, fuel injectors and valve
lifters, to giant parts such as landing gear struts.
Three work holding systems are available; roller/shoe
type, magnetic/shoe type and chucking with front loader or through the
spindle. Tooling costs are low and change-over is rapid.
The bearing industry typically uses the magnetic/shoe
system. Parts must be made from magnetic steel and have a ground OD and
face. When the part has a ground OD the roller/shoe system is
used. Chucking systems are available when the parts do not
have ground external surfaces.
External grinding is critical to many manufacturing organizations. The
performance of parts such as bearings and C-V joints are directly tied to how
well they were ground. At the same time external grinding is a bottleneck for
The Nova PGE series of external grinders are built to achieve roundness of
less than .000020" with cycle times as short as a few seconds. Dressing
systems are available to shape the wheel for roller bearing tracks, ball
bearing grooves and C-V Joint cage ODís.
External Grinding Examples
When components have multiple surfaces to be ground with tight geometrical
tolerances between them, then combination grinding is the best process. With a
component such as a gear, the part is chucked on the pitch diameter of the
teeth. As many as 4 spindles can be utilized, 2 or 4 spindles can be placed on a turret.
These wheels can one
at a time be presented to the part to grind the bore, the front face or the
An independent set of slides can be arranged on the machine
tangentially with a grinding wheel up to a 500mm's. This wheel can grind an external surface while any one of the wheels on the
turret is grinding simultaneously.
With this level of automation taking place inside the machine, post process
gauges and gantry loaders are available to allow machines to run with minimal
operator intervention for multiple shifts.
Constant Velocity Joint Grinding
Grinding of Constant velocity Joints for the
Automotive Industry is a specialty of Meccanica Nova.
Machines are designed for many components of the CVJ and other
automotive and on/off-highway applications. The below
are the most common:
- Outer Race (Bell): Internal Sphere and Ball Tracks
- Inner Race (Star): External and Ball Tracks
- Ball Cage: Internal, External and Windows