Abstract: The axis of rotation of a gear wheel subjected to thermal treatment and comprising at least one intermediate crown wheel and a pair of lateral tubular hubs arranged on opposite sides of the crown wheel is restored automatically by coupling a first of the hubs to a head rotating about a fixed axis of own rotation axis, displacing the other hub in a direction transverse to the fixed axis until both of the hubs and the crown wheel are brought into positions substantially sharing the fixed axis and providing on each of the hubs a respective centring surface sharing the fixed axis without uncoupling the first hub from the rotating head and keeping the gear wheel in a vertical and angularly fixed position.

Abstract: An apparatus for determining the effective case-hardening or nitriding depth of a steel component comprises a measuring head, including a laser source generating a variable frequency radiation for the scanning of pre-determined portions of the component to be measured; an infrared detector, configured so as to detect infrared radiation generated by the component to be measured; and computing means of spectra of the infrared radiation received; and an evolventimeter, connected to the measuring head and including first computing means suitable for computing a hardness profile of the component to be measured on the basis of a launch profile and spectra of the infrared radiation received and second computing means suitable for computing the effective case-hardening depth from the hardness profile computed.

Abstract: The axis of rotation of a gear wheel subjected to thermal treatment and comprising at least one intermediate crown wheel and a pair of lateral tubular hubs arranged on opposite sides of the crown wheel is restored automatically by coupling a first of the hubs to a head rotating about a fixed axis of own rotation axis, displacing the other hub in a direction transverse to the fixed axis until both of the hubs and the crown wheel are brought into positions substantially sharing the fixed axis and providing on each of the hubs a respective centring surface sharing the fixed axis without uncoupling the first hub from the rotating head and keeping the gear wheel in a vertical and angularly fixed position.

Abstract: An apparatus for determining the effective case-hardening or nitriding depth of a steel component comprises a measuring head, including a laser source generating a variable frequency radiation for the scanning of pre-determined portions of the component to be measured; an infrared detector, configured so as to detect infrared radiation generated by the component to be measured; and computing means of spectra of the infrared radiation received; and an evolventimeter, connected to the measuring head and including first computing means suitable for computing a hardness profile of the component to be measured on the basis of a launch profile and spectra of the infrared radiation received and second computing means suitable for computing the effective case-hardening depth from the hardness profile computed.

Abstract: A gear production plant has, along a gear production path, a station for preparing a number of blanks; a cutting station, where respective teeth are cut on the blanks to obtain a number of semifinished parts; a heat treating station, where the toothed semifinished parts are carburized or nitrided; and a finish station for finish machining the heat treated semifinished parts; the plant also having a check station located along the production path, downstream from the heat treating station or the finish station, and which houses an optical measuring unit for non-destructively determining the effective carburized or nitrided case depth on the teeth.

Abstract: A gear production plant has, along a gear production path, a station for preparing a number of blanks; a cutting station, where respective teeth are cut on the blanks to obtain a number of semifinished parts; a heat treating station, where the toothed semifinished parts are carburized or nitrided; and a finish station for finish machining the heat treated semifinished parts; the plant also having a check station located along the production path, downstream from the heat treating station or the finish station, and which houses an optical measuring unit for non-destructively determining the effective carburized or nitrided case depth on the teeth.