Automatic testing and sorting machines and special devices for the bearing industry

Ball Scanner Type BSC

is a testing and sorting machine for the non-destructive examination of the surface-quality of bearing balls. It uses an optical and an eddy-current method. Balls are fed from the inlet container disc to the monitoring point.

The Ball Scanner is the automatic machine by KROB for the defectometric examination of the surface-quality of bearing balls. The functionality and the comfort of operation has improved by employing a modern digital technology in comparison to the preceding machines.

The automatic testing and sorting machines of type BSC are intended for the defectometric inspection of defects on the surface of steel balls of diameter within the rated extent 40–70 mm.

Defective balls are sorted out by a newly designed and fully digitalized technology. The two simultaneously used testing methods – optical EOT and eddy-current ECT – enable a simultaneous examination for point defects and polish defects (the optical method) and for cracks, flats or shape defects (the eddy-current methods – they use two probes, which are arranged at an angle of 90 deg.). The check for point defects is evaluated in comparison to either relative or absolute standards.

The EOT and ECT methods are used in all automatic machines BSC.

If a ball that has passed through the monitoring point is found to be defective, the machine differentiates between the defects that were detected by the optical testers EOT1 and EOT2 (i.e. the ball can be repairable) and the defects found by the eddy-current testers ECT (the differential probe with two possible phase selections – this ball is non-repairable).

The eddy-current methods ECT1 and ECT2 have two independent optimally adjustable phase selections and amplification which guarantee a simultaneous examination with the maximum sensitivity for both cracks and flats on a surface of a ball. Both methods have now been complemented by the new Noise Methods - ECT1n und ECT2n. These methods enable not only a sorting of the balls according to defects of type ECT1 and ECT2 but also according to the quality of the whole surface.

The automatic machine of type BSC has only one monitoring point. Movement of balls inside the automatic machine (entering - monitoring point - sorting) is controlled by pneumatic actuators. Input and output of balls (including balls evaluated as defective ones) is carried out by means of container discs. As standard the output container disc for OK balls is equipped with a special Ball Transporter driven by the pneumatic actuators too. The Ball Transporter is used for a damage-free transport of scanned OK balls into the container BOX.

The BSC automatic machine sorts the balls after testing into three categories:

  • good (OK)
  • repairable (optical defects) – these balls can be washed and tested again, because the reason for the optical errors is usually dirt
  • non-repairable – defects found by the eddy-current method

The automatic machines BSC have different basic layout in comparison to the automatic machines BASC and BS. The main differences are:

  • The machine has only one monitoring point.
  • The ball movement inside the monitoring point is not controlled by exchangeable spherocone rollers, but drive cones (the same cones without any need for exchange for all ball diameters).
  • This machine utilises pneumatic actuators.
  • The machine is integrated inside a frame. (A special stand is not necessary.)
  • As standard the machine is equipped with a Ball Transporter for careful transport of scanned OK balls to the container BOX at its outlet.

Since the year 2009 we have been supplying our Balls Scanners of Type BSC only in the AS design. The machines supplied with this design can be used both in the STD (STanDard) and the AS (AeroSpace) regimes. For a more detailed explanation – see MODIFICATION AS

The machine is packed in a wooden box when it is transported overseas or on request.

KROB SCANNERS s.r.o., Drahkov 52, 415 01 Teplice, Czech Republic, EUROPE >>> | Version 2006 |
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