Method and apparatus for machining a workpiece
AssigneeMakino Milling Machine Co., Ltd.
InventorMakoto Nakamura
Life of this patent
Estimating the term…
Abstract
An apparatus machines a workpiece by a rotating cutting tool having at least one coolant channel extended toward the free end thereof with high-pressure coolant jetting onto the free end of the cutting tool. The coolant has sufficient pressure and flow rate to remove the heat and the chips generated during the machining. The cutting tool is fed in a path suitable for each machining operation with the cutting edges being advanced into the workpiece in a reverse direction to the feed direction. The apparatus can machine a workpiece of a material having high hardness and high toughness.
Claims18
A method of machining a workpiece by a rotating cutting tool including a shank adapted to be inserted into a tool fitting bore of a tool holder, a cutting part integrally formed therewith and having a cutting edge terminated at a free end of said cutting tool, and at least one coolant channel extended on the outer surface of the cutting tool from the rear end of said shank to a region adjacent to said free end of said cutting tool, which method comprises the steps of:
- supplying coolant into said tool fitting bore of said tool holder, said coolant having sufficient pressure and flow rate to remove heat and chips generated during said machining;
- directing said coolant in the form of a jet from the rear end of said shank to substantially said free end of said cutting tool in a direction parallel to an axis of said cutting tool through said at least one coolant channel so that said coolant is directly applied onto the faces of said cutting edges at said free end of said cutting tool without interruption;
- and
- feeding said cutting tool relative to said workpiece in at least one direction corresponding to one of a plurality of feed axes.
A method of machining a workpiece by a rotating a ball-end mill cutting tool including a shank adapted to be inserted into a tool fitting bore of a tool holder, and a cutting part integrally formed therewith and having cutting edges terminated at a free end of said cutting tool, which method comprises the steps of:
- supplying coolant into said tool fitting bore of said tool holder, said coolant having sufficient pressure and flow rate to remove heat and chips generated during said machining;
- directing said coolant in the form of a jet from the rear end of said shank to substantially said free end of said cutting tool in a direction parallel to an axis of said cutting tool;
- and
- feeding said cutting tool relative to said workpiece in at least one direction corresponding to one of a plurality of feed axes so that the depth of cut does not exceed one tenth of the diameter of said ball-end mill.
An apparatus for machining a workpiece by a rotating cutting tool including a shank adapted to be inserted into a tool fitting bore of a tool holder, and a cutting part integrally formed therewith and having cutting edges terminated at a free end of said cutting tool, and at least one coolant channel extended on the outer surface of the cutting tool from the rear end of said shank to a region adjacent to said free end of said cutting tool, which apparatus comprises:
- means for supplying coolant into said tool fitting bore of said tool holder, said coolant having sufficient pressure and flow rate to remove heat and chips generated during said machining;
- means for directing said coolant in the form of a jet from the rear end of said shank to substantially said free end of said cutting tool in a direction parallel to an axis of said cutting tool through said at least one coolant channel so that said coolant is applied onto the faces of said cutting edges at said free end of said cutting tool without interruption;
- and
- means for feeding said cutting tool relative to said workpiece in at least one direction of corresponding to one of a plurality of feed axes.
A cutting tool for machining a workpiece by cutting comprising:
- a shank adapted to be inserted into a tool fitting bore of a tool holder;
- a cutting part integrally formed with said shank and having twisted cutting edges terminated at a free end of said cutting tool, said cutting edges substantially performs cutting action at said free end;
- and
- at least one coolant channel on an outer surface of said cutting tool extended toward said free end from a rear end of said shank in a direction parallel to an axis of said cutting tool, and an opening of said respective at least one coolant channel facing to a face of said respective cutting edges at said free end of said cutting tool.
Dependencies are inferred from the claim text.