Device and method for machining crankshaft through single-station laser quenching and tempering

The invention discloses a device for machining a crankshaft through single-station laser quenching and tempering. The device comprises a computer and a laser device, wherein the computer controls the laser device, the downstream of the laser device is provided with a diffracted beam splitter, the downstream of the diffracted beam splitter is provided with a reflector, a combined lens is arranged at the downstream of the reflecting mirror, the computer is connected with a programmable controller and a chuck controller, the crankshaft is fixed to a screw rod, the computer inputs a contour signal of the crankshaft to the chuck controller, the chuck controller controls feeding and rotation of the screw rod, and the programmable controller controls the combined lens according to the contour signal of the crankshaft and enables the focal length of the combined lens to be adjusted. According to the device and the method, quenching and tempering processes can be achieved on a single station, the occupied space is gre