Lathe machining clamp for generator end cover

The utility model provides a generator end cover turning clamp which comprises a three-jaw chuck, a first clamp column is clamped in the three-jaw chuck, a positioning disc is fixed outside the first clamp column, jackscrew holes are formed in the outer portion of the positioning disc at equal intervals, and an annular array is formed between the jackscrew holes and the outer portion of the positioning disc. A plurality of positioning screws are fixed to the surface of the front end of the positioning disc at equal intervals through threaded connection. According to the turning clamp for the end cover of the automobile generator, after the expansion piece is sleeved with the end cover, the nut is screwed towards the position of the expansion piece, and the conical bolt is installed after the rear portion of the end cover is solidified; the expansion piece is extruded and expanded through the conical bolt to clamp and fix the end cover, then the lathe is started to machine the end cover, and the expansion piec