Ultrasonic-vibration-assisted tangent point tracking type follow-up electrolyzing and grinding combined machining device and method

The invention discloses an ultrasonic-vibration-assisted tangent point tracking type follow-up electrolyzing and grinding combined machining device and method. By adoption of the ultrasonic-vibration-assisted tangent point tracking type follow-up electrolyzing and grinding combined machining device and method, the problem that in the prior art, the machining efficiency for crankshafts and camshafts is low is solved, and the beneficial effects of improving the rigidity of the crankshafts or the camshafts and improving the machining efficiency are achieved. According to the technical scheme, the ultrasonic-vibration-assisted tangent point tracking type follow-up electrolyzing and grinding combined machining device comprises a chuck, a tailstock, a grinding wheel, a cathode, an electrolyte spraying head and an ultrasonic vibration device, wherein the chuck and the tailstock are spaced by a set distance so as to clamp a to-be-machined crankshaft or a to-be-machined camshaft; the grinding wheel and the cathode are