Sorting machines / General info

Automatic checking and sorting machine SIMET is an automatic machine designed for the defect detection on surfaces and 100 µm under surface of bearing ball. The detection is simultaneously carried out by three sensors: electro-optical, vibration and eddy current sensor.

A sorting of balls

The balls are sorted to three groups of good, repairable and irrepairable.

Repairable balls

To the group of "repairable", balls are sorted by the electro-optical tests. The electro-optical test rejects the balls with surface defects, polished-in flaws, and the soiled balls (these balls can be cleaned and then sorted as good ones - therefore, this defect is classified as repairable). The electro-optical test can be carried out in three modes:

  1. spot defects with suppression of different polish of balls
  2. spot defects including reduced polish by comparing with the polish of preceding balls
  3. reduced polish by comparing with the polish of preceding balls and with suppression of spot defects (not expected to be usually used for ball testing)

Irrepairable balls

To the group of "irreparable", balls are sorted by the vibration and eddy current tests. The test by means of the vibration sensor rejects the balls with gross surface defects. By the means of eddy current test, surface and subsurface defects or non-homogeneity of the material can be checked. This test can be carried out in two modes:

  1. spot defects with suppression of different polish of balls
  2. spot defects including reduced polish by comparing with the polish of preceding balls
  3. reduced polish by comparing with the polish of preceding balls and with suppression of spot defects (not expected to be usually used for ball testing)
  4. inspection of cracks, with the optimal suppression of material non-homogeneity
  5. inspection of cracks, with the emphasis of the signal for shape defects, with the compromised suppression of material non-homogeneity