Function
The item numbers specified for the corresponding individual
components relate to chapter drawings.( 9, Page 56)
Principle of Operation
The problem of air supply was solved by a stationary distributor
ring with profile ring seals arranged therein. Openings in the two
elastic radially deformable profile seals allow the compressed air
to flow through a non-return valve to one of the two pressure
chambers. The pilot controlled non-return valve controls the
feeding to one pressure chamber and the simultaneous forced
ventilation of the second pressure chamber. This triggers the
piston stroke and the base jaws are moved by the wedge hook.
The valve system blocks and stores the pressure in the chuck body
while the profile seals, due to their elasticity, are raised from the
chuck body by the ventilation of the supply lines and therefore are
not subject to wear from the rotating chuck.
Functional testing
Functional test
After installation of the chuck, its function must be checked prior
to start-up.
Two important points are:
• Clamping Force! The clamping force of the chuck must be
achieved at max. operating force/pressure.
• Stroke control! The stroke of the clamping piston must allow a
safety zone at the front and rear end position. The machine
spindle may only be started when the clamping piston has
passed through the safety zone. Only limit switches that meet
the requirements for safety limit switches specified in DIN EN
60204-1 may be used.
When determining the necessary clamping force to machine a
workpiece, take the centrifugal force acting on the chuck jaws into
account (according to VDI 3106).
If the chuck jaws are changed, adjust the stroke control to the new
situation.
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