Faceplate
The face plate is a clamping device for lathes , on which large, heavy or irregularly shaped workpieces are clamped for machining in a vertical or horizontal position. They often have four or six jaws .
The clamping jaws of a faceplate are individually adjustable according to the outline of the workpieces. They are adjusted using threaded spindles . In contrast to this, with a chuck, all clamping jaws are moved at the same time, so they are self-centering. For this purpose, workpieces that are not rotationally symmetrical can be machined on a faceplate. To get a "plan run", i. H. To achieve a symmetrical movement, so-called counterweights are additionally screwed onto the faceplate against any imbalance , similar to the balancing of a wheel rim on a car. Due to the high centrifugal forces and the off-center center of gravity, they may only be operated at a certain speed.
In addition, aids for clamping workpieces with very large diameters or openwork workpieces, covers or similar clamping irons are used.
Due to the small spindle pitch of the individual clamping jaws or the use of a power clamping spindle , high clamping forces can be transmitted. The clamping jaws of a faceplate are operated manually and / or hydraulically / pneumatically. Faceplate diameters of up to 12 meters are possible and are used on vertical lathes . Clamping with the conventional lathe on the conventional faceplate is time-consuming because it has to be aligned manually.
Individual evidence
- ↑ Herbert Schönherr: Machining production. Oldenbourg, 2002, p. 106.
literature
- Herbert Schönherr: Machining production. Oldenbourg, 2002, p. 106.