Compound wedge cut structure

The utility model discloses a compound wedge cut structure, include that cutting hole is drawn to the shallow bore hole, cutting hole and reliever are drawn to the deep hole, central line coincidence, drill way coincidence that cutting hole, deep hole drew cutting hole and reliever are drawn to the shallow bore hole, cutting hole is drawn to the shallow bore hole, cutting hole is drawn to the deep hole and the reliever is symmetrical structure along the central line respectively, the shallow bore hole is drawn cutting hole and deep hole and is drawn cutting hole to be the drill way interval big, the closely spaced wedge of hole bottom, the shallow bore hole is drawn cutting hole and deep hole and is drawn cutting hole's longitudinal section and be the rectangle, the shallow bore hole is drawn cutting hole and deep hole and is drawn cutting hole's cross section and be isosceles trapezoid, the degree of depth that cutting hole was drawn to the shallow bore hole is less than the degree of depth of reliever, the