METHOD FOR THE PRODUCTION OF A BEARING RING FOR LARGE-SIZE ROLLING BEARINGS

摘要

The invention relates to a method for producing a bearing ring (1) for large-size rolling bearings comprising at least one track (3) that is provided with a hardened peripheral layer. According to said invention, the peripheral layer that is to be hardened is exposed to the electric field of an inductor in order to be heated and is then quenched. The invention is characterized in that a) at least two inductors (2) are disposed above a common zone (a) of the annular track (3) that is to be hardened at the beginning of the hardening process and said inductors (2) heat the opposite peripheral layer to a hardening temperature there, b) the inductors (2) are moved in the opposite direction along the annular track in order to heat the adjacent central zones (b), c) sprinklers (5) that are directed onto the heated peripheral layers are turned on following a short distance, and the peripheral layers are quenched starting from the center of the zone (a) that was heated at the beginning, d) the inductors (2) and the sprinklers (5) continue to be moved on the halves of the rings thereof until coinciding again in a zone (c) located opposite the point of departure and forming a joint heating zone once again there, e) both inductors (2) are lifted perpendicular to the surface of the track (3) upon reaching the required hardening temperature, and f) the sprinklers (5) are directed onto zone (c).