| 摘要 |
<p>880,626. Heat treating. BRISTOL SIDDELEY ENGINES Ltd. May 25, 1960 [May 26, 1959], No. 17841/59. Class 72 A method of hardening a head screw comprises moving the screw axially, past a heating probe, by rotating the screw through stationary means engaging the thread, the rotation being effected by axially movable driving means. As shown, one end of the head screw 2 is attached to an electric motor 26 mounted on a track, the remainder of the screw being supported on steadies 1 and a heating and quenching unit which comprises stationary members 8 and 11 (Fig. 2) having balls 9 and 12 which may be tightened by screw threaded pins 17. Between the stationary members a heating probe, e.g. a high frequency intensifier 5, is located, the probe entering, but not touching the thread of the head screw. The stationary members and the probe are immersed in an oil bath, refrigeration apparatus being provided to cool the oil. As the motor 26 rotates, the screw moves longitudinally through the oil bath, past the probe, and also causes the motor to move along its track.</p> |
