Turning cutter for processing ring-shaped deep U-shaped groove of part

The utility model discloses a turning cutter for processing a ring-shaped deep U-shaped groove of a part, which belongs to the field of mechanical processing and relates to improvement of the turning cutter for processing a ring-shaped deep U-shaped groove of a part. The utility model comprises a left turning cutter (1) and a right turning cuter (2) and is characterized in that the cutting edge portion of a left or a right turning cutter blade is in a cuneiform shape, a flat surface on which one edge of the cuneiform cutting blade is placed shares one surface with the right or the left side surface of a cutter rod, a front end cutter point of the cutter blade is provided with a front cutting edge, and the other edge of the cuneiform cutting blade is an inclined cutting edge. When the utility model processes the ring-shaped deep U-shaped groove of a part, times for changing cutters are few, the working efficiency is high, and the processing cost is low.