Hyd-Mech V-25APC, Руководство пользователя

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3.7
BLADE GUIDES
The blade is twisted and guided by upper and lower guide block assemblies. These are almost identical except that the
upper assembly contains a coolant gallery, and the lower guide is externally tapered on an angle to allow it to sit closer to
the underside of the table.
Each assembly consists of a fixed rear plate bolted to the guide arm, and a movable front plate hinged to the rear plate.
An adjusting screw “A”, circled in the pictures allows the front plate to be swung into or away from the rear plate. Mounted
in each plate is a carbide pad and a roller. The two rollers twist the blade through 90 ° , and the two pads support the blade
laterally. The rear plate also carries a pivoting carbide insert that applies the feed force to the back (or smooth) edge of the
blade.
Drive Guide Arm
A
Coolant Line
B
Idler Guide Arm
The adjusting screw assembly includes a pre-loaded stack of spring washers so that when the screw is turned in (clock-
wise) to a firm stop, the carbides clamp the blade with a controlled force. To open the guide for blade changing the
adjusting screw is backed out (counterclockwise) 2 – 3 turns, using the supplied 5mm hex key. The first half turn takes the
spring loading off the carbide, and the subsequent turns open the front plate and its carbide away from the rear plate and
its carbide, to assist blade removal and insertion.
No adjustment is normally required, except to open and close the adjusting screw, as described above for blade change.
Maintenance of the guide assemblies will consist of periodically inspecting, and replacing, as necessary, the side and
back carbides, and the blade rollers.
Roller stoppage may occur at any time due to the wedging of cuttings between the blade and the roller. This will quickly
cause a flat on the roller, which requires that it be replaced. For this reason the operator should make it a regular habit to
visually check that all four rollers are turning.
Roller replacement does not require removing the front plate of the guide - simply remove the associated shoulder bolt.
On the bearing in the front plate, there is a small shim between the bearing inner race and the front plate. The shim must
be replaced in the same spot to keep the outer race of the bearing from rubbing on the front plate. The rollers are stan-
dard double sealed 6200 ball bearing units that are readily available at any bearing supply.
The side carbides and the pivoting back carbide wear very slowly but should be inspected every 6 months, and whenever
crooked cutting does not arise from another obvious cause. Access to the carbides is gained by removing the movable
front guide plate from the fixed rear plate. To do this, open the adjusting screw “A” 2-3 turns as for normal blade change.
Then, using a 5mm hex key remove the two hinge bolts, labeled B in the pictures. At this point the front plate will be held
only by the loosened adjusting bolt. Support the front plate with one hand while unscrewing the adjusting screw complete-
ly (about 6 – 7 turns).