Method for dynamically checking the teeth of a part and checking device using said method

A device (10) for dynamically checking teeth of a part (1) defined at least by its module, its nominal diameter and its tooth profile, the device comprising:

• a first spindle (22), on which the part (1) to be checked is mounted, being coupled with a motorization (23, 24) and angularly controlled by a first encoder (25),
• a second spindle (32), on which a master pinion (2) is mounted, being coupled with a motorization (33, 34) and angularly controlled by a second encoder (35),
• the two spindles (22, 32) being parallel and separated by a center distance that allows the master pinion (2) to mesh with the part (1) to be checked,
• movement control means for controlling the movement, and
• means for processing the information provided by the encoders arranged to characterize possible defects of the teeth,
• wherein the master pinion (2) is a pinion with a small thickness compared to the thickness of the part (1) to be checked so as to minimize a contact area of the teeth of the master pinion on the teeth of the part to be checked,
• at least one of the spindle (32) carrying the master pinion (2) or the spindle (22) carrying the part (1) to be checked is mounted on board of a first carriage (43) movable in translation parallel to the axis of the spindles (22, 32) and is arranged to move the master pinion (2) along the profile of the teeth of the part (1) to be checked, and
• the processing means are arranged to characterize both the radial defects and the angular defects of the teeth, and these defects being differentiated.