|Machine Category||Super Finishing Machine|
|Type||CenterStar ZS 412|
|Storage location||in transit|
|Country of origin||Germany|
|Delivery time||to be agreed|
THIELENHAUS - CenterStar ZS 412
- B-Axis swivable
Picture 1: Oscillation Adjustment (Thread Machining)
The adjustable flanges are used for adjusting the correct
stone position. They have to be adjusted manually according
to the pitch of the rack. The adjustment has three parameters
(Diameter, Pitchangle and Pitch).
The rear base bracket is fixed on the machine bridge. They
carry the front base bracket which can be adjustet sideways.
Using the gage block S this allows for different pitches.
The gage blocks D1.1, D2.2 and D2.3 are used to adjust the diameter
by moving the intermediate plates.The gage blocks W1.1 and W2.2 are
used to adjust the pitch by rotating the Flanges which carry the
oscillation motors. The tool carries are mounted to the oscillation
motors with a locking sleeve and a locating pin. The oscillation motors
have absolute encoders and air purge.
Using the absolute encoder the Microfinishing stone can be set to any
angle and oscillate around this starting angle by a defined oscillation
angle. The gage blocks can not be put into the wrong location and are held
on the machine during adjustment by pins. All the flanges are held by locking
The gage blocks only have to be changed if new workpieces are to be
The gage blocks are labeled:
X = D; W or S for angel, diameter or pitch.
Y = 1, 2, 3... for differnet parts angle, diameter.
Picture 2: Tool Carriers and Stone Holders
The toolcarrier is mounted to the oscillation motor shaft and
carries the tool holder with the locked Micrpfinish stone.
The tool carrier consists of a housing with linear buchings and a
slide. The slide is actuated by two hydraulic. The slide presses the
stone holder and the stone against the machining surface of the
workpiece. The hydraulic pressure in the tool carrier is controlled
by the software and a proportional valve and is monitored by a pressure
switch. The pressure has to be set according to the machining task, the
stone hardness and the part quality.
The set screws on the tool carrier have to be adjusted so that the
stone holder can not touch the workpiece in the evnet of a worn or
broken stone. The stones are locked inside the too hloder with a spring.
The adjustment is done automatic by the Stonemaster
Picture 3: Stone Worn-/Stone Broken Detection
The stone worn- / stone broken detection is done by pneumatic poppet
valves which are integrated into the too carrier.
If the tool carrier slide moves too far into the direction of the
workpiece (in case of a worn or broken stone) the valve stem hits the
the screw. As the stone wears the first valve release pressure which is
detected by a pressure switch in the ingoing pneumatic line. In the case
of a broken stone the second valve also release pressure causing a different
reading on the pressure switch.
The control stops the automatic cycle and displays an error message on the
HMI screen and on the stack light.
Picture 4 / 5: Stonemaster (Automatic Stonefeed)
The automatic stone feed Stonemaster consists of the tool holder, the
actuator and the back stop.
The stone holder is mounted to the tool carrier which is on the oscillation
motor. This way the tool holder can be swiveled into any angular position.
The stone holder locks the stone in place with a polyurethane washer which
is acting as spring. It aslo has a release mechanism consisting of a small
drawbar. Due to this set up the mass of the system is low and does not
have a negative influence on the oscillation.
The actuator unlocks the stone in the tool holder according to the
commands given from control. It consists of a base bracket with an
integrated support surface, a lever with a fork style head and a pneumatic
cylinder. The actuating unit is mounted to the same flange as the oscillation
motor and can be advanced to the working position by a second pneuamtic
cylinder and linear guides. During machining the stonemaster is retracted.,
so that it doesn't interfere with editing.
Picture 6: Groove Position Detection
The groove in the rack is being detected by a proximity switch. The groove
position detection is mounted to the steady rest bracket.
The work slide Z1 positiones the rack underneath the proximity switch. This
determines the right and left flank of the groove and the control calculates
the center of the groove.
|workpiece diameter||min. 20 - max. 40mm|
|workpiece length||min. 500 - max. 1.000mm|
|turning speed range||50 - 500min/-1|
|turning speed range||max. 1.500min/-1|
|dressing device||max. 50min/-1|
|total power requirement||25kW|
|weight of the machine ca.||8,5t|
|dimensions of the machine ca.||6,0 x 6,0 x 3,0m|