The invention relates to plane magnetic
grinding machining assembly line and
machining method for an inner surface of a
elbow. The
assembly line is characterized in that a feeding
station, a machiningstation and a discharging
station are connected through a plurality of conveying belts, and
grinding material filling devices are arranged on the two sides of the side, close to the
machining station, of a feeding conveying belt, and
grinding material filling rotary magnetic discs are arranged at the bottom of part, below grinding material discharging ports at the bottoms of the grinding materialfilling devices, of the feeding conveying belt; and the machining station is provided with a plurality of magnetic grinding machines and two mechanical arms; the
tail end of a discharging conveying belt is also provided with a
stainless steel wire mesh conveying belt and an grinding material collecting conveying belt, the grinding material collecting conveying belt is arranged below the stainlesssteel
wire mesh conveying belt, and a grinding material collecting rotary magnetic disc is arranged at the bottom of the grinding material collecting conveying belt. According to the
assembly line and the method, grinding and
polishing of the inner wall of the elbows with irregular cross sections, the inner wall of the elbows with variable diameters and the inner wall of the welded elbows is realized, the line production of magnetic grinding machining on the inner surface of the
elbow is also realized, so that the batch machining of workpieces is facilitated, and the production efficiency isimproved.