Automatic grinding device for inner fillet weld of flange

An automatic grinding device for flange inner fillet welds comprises a rotating rack and comprises a fixing button in the center and three supports extending outwards with the fixing button as the circle center, adjusting holes are formed in the supports, a clamping device is matched with a spring cotter through the adjusting holes and fixed to the supports, and a walking mechanism is clamped by the clamping device. The walking mechanism is connected with the polishing mechanism through the automatic flexible feeding mechanism. Traveling wheels are fixed to the bottom of a rotating shaft of the traveling mechanism, and rear-end depended wheels are arranged below the traveling wheels. The grinding mechanism is further provided with a longitudinal air pressure transmission feeding mechanism, the bottom of a transmission shaft of the longitudinal air pressure transmission feeding mechanism is connected with a grinding wheel, and the grinding mechanism is further fixedly provided with a front end leaning wheel. T