Bulb grinder

The utility model discloses a button head grinding machine in the button head processing device field, which comprises a backing plate. A one-way corner tooth slide carriage is arranged on the backing plate, a motor is fixed on a slider of the one-way corner tooth slide carriage, a motor shaft is in parallel with the sliding direction of the slider, a headstock is arranged on the end of the motor shaft, and a cup grinding wheel is connected with the headstock. During processing, a blank of a button head body part is fixed on a chuck of a machine tool, the utility model is fixed with the middle drag harrow of the machine tool through the backing plate, and the motor rotating shaft is simultaneously enabled to form an included angle with the main shaft of the machine tool. During grinding, the button head is stuck in the mouth part of the cup grinding wheel, the machine tool drives the button head part to rotate, simultaneously the cup grinding wheel also rotates, and envelopes and grinds the button head, and t