A grinding driver is a devise for clamping shafts on a cylindrical grinding machine, where the rotational movement of the spindle is transmitted to the workpiece. The workpiece is usually held between centers. The grinding driver replaces the classic drive dog. We distinguish between mechanical and pneumatic grinding drivers.
Standard Types
Mechanically
In the case of a mechanical grinding driver, the clamping jaws are automatically closed by the start of the spindle and opened when the spindle is stopped. In some cases the jaws may not open automatically. In such cases, an opening of the clamping jaws can be forced by counter rotating the spindle while preventing the driver mantle to turn. By attaching a cylinder, the mechanical grinding driver can be fully automated.
cgm
The center grip is available in different sizes and clamping ranges. Due to the floating clamping jaws, the workpiece is not pushed out of center and thus promotes concentricity.
cgv
The grinding driver cgv is a slightly modified version of the cgm. The difference is that the clamping jaws are mounted outside of the front plate. That is why parts can be ground closer to the jaws.
cgx
In contrast to the cgm and agm, with this grinding driver there is no need to change the clamping jaws when the size of the work pieces changes. Due to the large clamping range of 35mm, chaotic assembly is possible. The range in which the 35mm must be is adjustable individually.
Pneumatic
In the case of a pneumatic grinding driver, the clamping jaws close by spring pressure and open pneumatically by an air pressure of 2.5 bar. The control of the air valve is either operated by the machine controller or manually, for example, by a foot pedal.
agm
The Autogrip is available in different sizes. With only three jaw sets per grinding driver, a clamping range of 40mm can be covered.
Special products
In addition to the standard products, Elaso takes on new challenges and develops a suitable grinding driver for you.
Modular friction surface driving system
Jean-Claude Montandon GmbH
Basic principle
- Pick-up of workpiece between the centers
- Transport via fixed or spring-loaded, compensating friction surface insert
- Several friction surface systems such as friction cones, diamond surfaces, grooves, O-rings are possible
- Pneumatic actuation via quick coupling
- Axial tip position and clamping force manually adjustable
- Tooling consists of a tip and a friction surface insert