Milling tool and workpiece machining method
AssigneeMakino Milling Machine Co., Ltd.
InventorsHiroshi UENO, Ryoichi MIYAMOTO, Fukuhito NAGATA
Life of this patent
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Abstract
A milling tool is configured from a shank part and a head with a cutting edge that is provided on the leading end of the shank part. The head comprises an expanding diameter section, the diameter of which expands gradually from the base end that contacts the shank part in the direction of the leading end, and a decreasing diameter section, the diameter of which gradually decreases from the maximum diameter section in the direction of the leading end. At least one cutting edge is provided on each of the expanding diameter section and the decreasing diameter section.
Claims2
A workpiece machining method for undercutting interior portions of a rib of a workpiece attached to a table of a machine tool and a return flange formed contiguous with the rib, the method comprising the steps of:
- attaching a milling tool to a spindle of the machine tool and rotating the milling tool, wherein the milling tool is composed of a shank part and a head which is provided on a distal end of the shank part and which has a cutting edge, wherein the head has an expanding diameter section, the diameter of which gradually increases along a direction from a proximal end contiguous with the shank part toward a distal end, and a decreasing diameter section, the diameter of which gradually decreases along a direction from a maximum diameter section toward the distal end, and wherein cutting edges are provided on the expanding diameter section and the decreasing diameter section;
- and
- machining an interior of the return flange with a cutting edge of the expanding diameter section of the milling tool and machining a side surface of the rib with a cutting edge of the decreasing diameter section of the milling tool.
Dependencies are inferred from the claim text.