Table of contents
3QLCLM
Edition: 04/2014
38
7.2 Operation
Insert and grip the work piece in the power chuck. Start the machine and wait for the machine
program to enable the spindle rotation.
Do not start the machine spindle until the actuating cylinder has built up sufficient pressure and
the work piece has been gripped within the permissible working range!
Machine work pieces at high spindle speeds only under the protection of an adequately
dimensioned safety guard!
Make sure to fit safety devices and close safety guard!
•
The safety guard must be locked as long as the machine spindle is running and
should only be opened when the spindle has come to an absolute standstill!
•
Operation of the power chuck must always comply with the local safety and
accident prevention regulations! Reference is expressly made to the specific
accident prevention regulations of the local industrial safety authority.
•
Local safety instructions must always be observed when operating systems and machines.
•
Check sample work pieces!
The precision of the power chuck is illustrated during repeated chucking of a work piece and
by its running precision when the work piece was machined in several consecutive
chucking. If the center of the gripping cross-section deviates from the lathe centerline
beyond the specified tolerance, this will result in faulty work pieces and consequently to
scrap!
7.3
Unauthorized operation
In the event of system imbalance at the actuating cylinder or power chuck, eliminate the
imbalance immediately!
7.4
Safety instructions
•
During rotation of the power chuck, use a dynamic gripping force meter, e.g. FORSAVE D, to
determine the dynamic gripping force.
•
Determine the loss of gripping force under dynamic conditions at every changeover to ensure
that the gripping force is adequate for the desired operation.
•
In the event of a loss of chucking power, stop the machining operation and the machine spindle
immediately!
•
In order to maintain the gripping force over long production runs, operate the chuck periodically
under no-load (without a work piece). A uniform gripping force of the chuck is assured only if the
lubrication films are maintained and the grease is distributed to the loaded parts.
•
Release the work piece from the chuck only after stopping the machine spindle!
•
Do not leave the work piece in the chuck overnight as the chuck releases the work
piece after the power chucking system has been switched off!
7.5
Procedure in the event of malfunctions
Irrespective of the instructions given below, the power chuck must always be operated
in accordance with the local safety regulations!
