The utility model relates to a kind of three-blade nine-face hinge
drill, including tool shank, three groups of tool bodies are evenly provided on the tool shank, and the adjacent two groups of tool bodies are formed with
chip pocket, and intermediate positioning head is welded in the middle between three groups of tool bodies, the side of each group of tool bodies opposite with the
chip pocket is welded with main blade, and two side blades are welded on the outer wall of each group of tool bodies, by
welding one main blade on the side of each group of tool bodies and
welding two side blades on the outer wall, three-blade nine-face
chip removal structure is formed, and when chip removal, it is reasonable to set between each other, stress is uniform, can improve overall
machining intensity,
delay wear, to effectively improve
processing efficiency.