Combined hole making and threading tool
OwnerManuel C. Turchaninventor
Life of this patent
Estimating the term…
Abstract
A combination tool is disclosed for drilling a hole in a workpiece on the inward feed of the tool and for threading the hole during retraction of the tool. The tool that has a straight body with a drill point at the forward end, a shank at the rearward end and a thread-form mill between the drill point and the shank.
Claims36
A hole making and threading tool for use in a machine tool which is adapted to simultaneously rotate a cutting tool about its axis, move said cutting tool axially to form a hole in an imperforate surface of a solid portion of a workpiece, and thereafter concurrently move said axis axially and orbitally to form a thread, said tool comprising:
- a body having a shank at one end, a hole making means at the other end for making said hole in said imperforate surface of said solid portion of said workpiece, said hole having a wall, and a thread making means intermediate said one end and said other end, said thread making means having a maximum diameter which is no greater than the maximum diameter of said hole making means;
- and at least one chip removal passage extending from said other end through said thread making means, whereby said thread making means can enter said hole made by said hole making means in said imperforate surface of said solid portion of said workpiece without interference with said wall of said hole to thereafter form said thread in said wall, said hole making means comprising an end mill.
A hole making and threading tool for use in a machine tool which is adapted to simultaneously rotate a cutting tool about its axis, move said cutting tool axially to form a hole in an imperforate surface of a solid portion of a workpiece, and thereafter concurrently move said axis axially and orbitally to form a thread, said tool comprising:
- a body having a shank at one end, a hole making means at an other end for making said hole in said imperforate surface of said solid portion of said workpiece, said hole having a wall, and a thread making means intermediate said one end and said other end, said thread making means having a maximum diameter which is no greater than the maximum diameter of said hole making means;
- and at least one chip removal passage extending from said other end through said thread making means, whereby said thread making means can enter said hole made by said hole making means in said imperforate surface of said solid portion of said workpiece without interference with said wall of said hole to thereafter form said thread in said wall, said hole making means comprising a hollow drill point.
A hole making and threading tool for use in a machine tool which is adapted to simultaneously rotate a cutting tool about its axis, move said cutting tool axially to form a hole in an imperforate surface of a solid portion of a workpiece, and thereafter concurrently move said axis axially and orbitally to form a thread, said tool comprising:
- a body having a shank at one end, a hole making means at an other end for making said hole in said imperforate surface of said solid portion of said workpiece, said hole having a wall, a thread making means intermediate said one end and said other end;
- at least one chip removal passage extending from said other end through said thread making means;
- and chamfer cutting means disposed adjacent said thread making means;
- and
- said thread making means having a maximum diameter which is no greater than the maximum diameter of said hole making means whereby said thread making means can enter said hole made by said hole making means in said imperforate surface of said solid portion of said workpiece without interference with said wall of said hole to thereafter form said thread in said wall.
A hole making and threading tool for use in a machine tool which is adapted to simultaneously rotate a cutting tool about its axis, move said cutting tool axially to form a hole in an imperforate surface of a solid portion of a workpiece, and thereafter concurrently move said axis axially and orbitally to form a thread, said tool comprising:
- a body having a shank at one end, a hole making means at an other end for making said hole in said imperforate surface of said solid portion of said workpiece, said hole having a wall, and a thread making means intermediate said one end and said other end;
- at least one chip removal passage integral with said body, said at least one chip removal passage extending from said hole making means through said thread making means, said at least one chip removal passage comprising at least one spiral flute;
- and
- said thread making means having a maximum diameter which is no greater than the maximum diameter of said hole making means whereby said thread making means can enter said hole made by said hole making means in said imperforate surface of said solid portion of said workpiece without interference with said wall of said hole to thereafter form said thread in said wall.
A hole making and threading tool for use in a machine tool which is adapted to simultaneously rotate a cutting tool about its axis, move said cutting tool axially to form a hole in an imperforate surface of a solid portion of a workpiece, and thereafter concurrently move said axis axially and orbitally to form a thread, said tool comprising:
- a body having a shank at one end, a hole making means comprising an end mill at an other end for making said hole in said imperforate surface of said solid portion of said workpiece, said hole having a wall;
- a thread milling means intermediate said one end and said other end;
- and
- at least one chip removal passage extending from said hole making means through said thread milling means, said thread milling means having a maximum diameter no greater than the maximum diameter of said end mill in said imperforate surface of said solid portion of said workpiece whereby said thread milling means can enter a hole made by said end mill without interference with said wall of said hole to thereafter form said thread in said wall.
A method for producing a threaded hole in an imperforate surface of a solid portion of a workpiece comprising the steps of:
- providing an elongated tool having an axis of rotation, a hole making means at one end, a thread making means on the side thereof, said thread making means having a maximum diameter which is no greater than said hole making means, and chamfer cutting means disposed adjacent said thread making means;
- rotating said tool about said axis of rotation while shifting it axially to move said hole making means against and into said imperforate surface of said solid portion of said workpiece to form a hole in said imperforate surface of said solid portion of said workpiece, said hole having a wall therein;
- while continuing to rotate said tool, shifting said tool further axially to move said chamfer cutting means into said imperforate surface of said solid portion of said workpiece to form a chamfer on said hole made by said hole making means;
- while continuing to rotate said tool, concurrently moving said axis of rotation orbitally around said hole and axially along said hole to produce threads in said wall of said hole;
- displacing said axis of rotation back to the center of said hole;
- and
- retracting said tool from said hole.
A method for producing a threaded hole in an imperforate surface of a solid portion of a workpiece comprising the steps of:
- providing an elongated tool having an axis of rotation, an end mill at one end and a thread making means on the side thereof, said thread making means having a maximum diameter which is no greater than said end mill diameter;
- rotating said tool about said axis of rotation while shifting it axially to move said end mill against and into said imperforate surface of said solid portion of said workpiece to form a hole in said imperforate surface of said solid portion of said workpiece, said hole having a wall therein;
- while continuing to rotate said tool, concurrently moving said axis of rotation orbitally around said hole and axially along said hole to produce threads in said wall of said hole;
- displacing said axis of rotation radially back to the center of said hole;
- and
- retracting said tool from said hole.
In combination with a machine tool of the type having a spindle adapted to simultaneously rotate a cutting tool about its axis and feed said cutting tool axially for cutting a hole in an imperforate surface of a solid portion of a workpiece and thereafter concurrently move said axis in an orbital path and axially whereby a point on said cutting tool defines a helical path, the improvement comprising a hole making and threading tool having:
- an elongated straight body having a shank at one end;
- a hole making means at the other end for making said hole in said imperforate surface of said solid portion of said workpiece, said hole having a wall;
- and a thread making means intermediate said one end and said other end;
- and
- at least one chip removal passage extending from said hole making means through said thread making means;
- and
- said thread making means having a maximum diameter which is no greater than the maximum diameter of said hole making means whereby said thread making means can enter said hole made by said hole making means in said imperforate surface of said solid portion of said workpiece without interference with said wall of said hole to thereafter form a thread in said wall, said hole making means comprising an end mill.
In combination with a machine tool of the type having a spindle adapted to simultaneously rotate a cutting tool about its axis and feed said cutting tool axially for cutting a hole in an imperforate surface of a solid portion of a workpiece and thereafter concurrently move said axis in an orbital path and axially whereby a point on said cutting tool defines a helical path, the improvement comprising a hole making and threading tool having:
- an elongated straight body having a shank at one end;
- a hole making means at the other end for making said hole in said imperforate surface of said solid portion of said workpiece, said hole having a wall;
- and a thread making means intermediate said one end and said other end;
- at least one chip removal passage extending from said hole making means through said thread making means;
- and
- said thread making means having a maximum diameter which is no greater than the maximum diameter of said hole making means whereby said thread making means can enter said hole made by said hole making means in said imperforate surface of said solid portion of said workpiece without interference with said wall of said hole to thereafter form a thread in said wall, said hole making means comprising a hollow drill point.
In combination with a machine tool of the type having a spindle adapted to simultaneously rotate a cutting tool about its axis and feed said cutting tool axially for cutting a hole in an imperforate surface of a solid portion of a workpiece and thereafter concurrently move said axis in an orbital path and axially whereby a point on said cutting tool defines a helical path, the improvement comprising a hole making and threading tool having:
- an elongated straight body having a shank at one end;
- a hole making means at the other end for making said hole in said imperforate surface of said solid portion of said workpiece, said hole having a wall;
- and a thread making means intermediate said one end and said other end;
- at least one chip removal passage extending from said hole making means through said thread making means;
- and chamfer cutting means disposed adjacent said thread making means;
- and
- said thread making means having a maximum diameter which is no greater than the maximum diameter of said hole making means whereby said thread making means can enter said hole made by said hole making means in said imperforate surface of said solid portion of said workpiece without interference with said wall of said hole to thereafter form a thread in said wall.
In combination with a machine tool of the type having a spindle adapted to simultaneously rotate a cutting tool about its axis and feed said cutting tool axially for cutting a hole in an imperforate surface of a solid portion of a workpiece and thereafter concurrently move said axis in an orbital path and axially whereby a point on said cutting tool defines a helical path, the improvement comprising a hole making and threading tool having:
- an elongated straight body having a shank at one end;
- a hole making means at the other end for making said hole in said imperforate surface of said solid portion of said workpiece, said hole having a wall;
- and a thread making means intermediate said one end and said other end;
- at least one chip removal passage extending from said hole making means through said thread making means, said at least one chip removal passage comprising at least one spiral flute;
- and
- said thread making means having a maximum diameter which is no greater than the maximum diameter of said hole making means whereby said thread making means can enter said hole made by said hole making means in said imperforate surface of said solid portion of said workpiece without interference with said wall of said hole to thereafter form a thread in said wall.
Dependencies are inferred from the claim text.