Device design capable of automatically adjusting preheating position of cutting gun and application of device design

The invention relates to a device capable of automatically adjusting a preheating position of a cutting gun. The device comprises a motor, wherein a baffle block is arranged on an output shaft of the motor, a counting proximity switch is arranged on a speed reducer, and the other end of the output shaft of the motor is connected with the speed reducer; a cutting gun in-situ proximity switch is arranged on a frame of a cutting trolley, a distance X exists between the cutting gun in-situ of the cutting gun and the edge of a casting blank needing to be cut, and the whole device is controlled by a PLC (Programmable Logic Controller). According to the device disclosed by the invention, the problem that the cutting gun in-situ proximity switch needs to be frequently adjusted on line as the casting blank cannot be preheated due to misalignment between the edge of the casting blank and the preheating position of the cutting gun caused by uneven cooling and the like is solved, remote adjustment is realized, and the de