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A measuring station must be provided for checking the current production of cylindrical shafts. The following demands are placed on measurement:
The following measurements must be made:
The basis is a laser scanner centered on a helium/neon tube emitting a parallel-aligned pencil-thin laser beam.
This permits rapid and high-precision measurements to be made on the workpiece without the need for any adjustment.
The diameter and the edges are measured, and bevel, curve and roundness measurements are possible as an option.
Diameter: 4 to 120 mm
Length: 5 to 700 mm
Diameter: > 1 sec.
Length: > 10 secs.
Diameter: 0.005 mm
Length: 0.05 mm
A slide is located on a solid base frame with drawers for various measuring equipment and tools.
Holders for the test pieces are provided on the slide, which is moved past a laser by a variable-speed motor.
The travel is measured with an accuracy of ?m using a glass scale and the exact position is displayed digitally.
Adjustable cantilevers on hardened and ground shafts hold the test pieces.
The these cantilevers are two work-holding centres to hold the shafts being tested between the centres.
In order to measure shafts without centres too, roller supports are provided in addition to the work-holding centres and roller supports are connected by a toothed-belt system and are driven by a variable-speed motor for concentricity measurement.
For the disposal from nuclear power stations, it is necessary to seal the nuclear waste with glass and cast it in moulds. The handling of those moulds occurs in a manless system. This is aggravated by the fact that the temperature in the bottles is approx. 600 C.
For the handling of such moulds a gripper is to be engineered.
In cooperation with the KFK (Kernforschungszentrum Karlsruhe, i.e. Nuclear Research Centre at Karlsruhe) the gripper system was made as follows:
For storage purposes, contaminated material is filled in 200 l barrels. To determine the dose radiation of the single barrels, these must be checked all around. The barrels weigh up to 1000 kg. It must be possible to use two locating diameters. For carrying out the measurement, the barrel must perform one rotation. The unit must be movable and fit through a 900 mm wide door.
The measuring set-up and the rotation mechanism of the barrel meter is installed on a 42 mm thick steel plate. In the movable condition, the dimensions of the meter are (width x length x height) 850 x 1300 x 1600 mm.
The rotation mechanism consists of a locating ring with 5-bearing system. Drive is by a toothed belt around the locating ring. The direct-current motor permits a continuously adjustable rotation time of 200 – 2000 sec. An intermediate ring inside the locating ring allows 2 different barrel diameters. Loading can be done by means of a crane or a lift truck.
For dose measurement, there are 12 differently arranged gamma sensors on the meter. During the measurement, the dose rate is determined and recorded every 5°.
For storage purposes, contaminated material is filled in 200 l barrels. The radiation spectrum parallel to the barrel meter must be determined. To do so, a cryostatic detector is moved up and down the surface area of the barrel – up to 20 times during one barrel rotation. The device must be movable and fit through a 900 mm wide door.
The barrel measuring slide is built as a self-contained unit which is both electrically and mechanically coupled to the barrel meter. During one rotation of the barrel meter, the slide with the cryostatic detector moves up to 20 times up and down. The stroke rate can be set from 10 – 60 mm/sec, also the stroke length and the detector distance from the barrel wall can be set. In the movable condition, the dimensions of the device (width x length x height) are 800 x 1200 x 1850 mm.
During the measurement (1 rotation in 200 – 2000 sec), the dose rate is determined and recorded.