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US 7,311,481 B2Granted
Milling cutter
AssigneeKennametal Inc.
InventorsDirk Kammermeier, Peter Mergenthaler
Life of this patent
Estimating the term…
Abstract
Milling cutter (1), which can rotate about a cutter longitudinal axis (A), comprises a sleeve-shaped shaft (2) provided with an inner lying chip evacuation channel (11), which is arranged, in essence, symmetric to the cutter longitudinal axis (A), and with a suction opening (12). The milling cutter also comprises a milling head (3, 3a, 3b, 3c), which is held coaxial to the cutter longitudinal axis (A) and to the shaft (2) while being held on said shaft and which comprises, as cutting edges (7, 9), a face cutting edge (7) and a peripheral cutting edge (9). At least one cutting edge (7, 9) forms a positive rake angle (γa, γr) on the periphery of the milling head (3, 3a, 3b, 3c). The milling cutter (1) is particularly suited for machining light metals, especially for circular milling.
Claims20
An end milling cutter comprising a central longitudinal axis about which said end milling cutter is to be rotated, said end milling cutter comprising:
- a shaft comprising an internal channel disposed in said shaft;
- said internal channel being configured to receive and guide chips produced during a cutting process;
- said internal channel being configured to be operatively connected to a suction device configured to create a suction force in said internal channel to suck chips produced during a cutting process through said internal channel;
- a milling head being disposed at an end of said shaft;
- said shaft comprises a diameter;
- said milling head comprises a diameter;
- the diameter of said shaft is smaller than the diameter of said milling head, at least in an area that borders said milling head;
- and
- said milling head comprising:
- an end face being disposed at an end of said end milling cutter and facing away from said shaft;
- said end face being substantially orthogonal to the longitudinal axis;
- said end face comprising a substantially flat solid portion being disposed substantially in a plane;
- a peripheral side surface disposed about the perimeter of said milling head;
- a cutting structure being configured to cut an object in a cutting process;
- and
- said cutting structure comprising:
- a face cutting edge being disposed to lie in said end face and substantially in the plane of said end face of said milling head;
- a peripheral cutting edge being disposed to lie in said peripheral side surface of said milling head;
- at least one of said cutting edges being configured to form a positive rake angle;
- upon said face cutting edge forming a positive rake angle, said face cutting edge being configured as follows:
- (a) said face cutting edge and said peripheral side surface forming an angle, across a solid portion of said end face between said face cutting edge and said peripheral side surface, at the intersection of said face cutting edge and said peripheral side surface;
- said face cutting edge angle comprising an acute angle configured to form a positive rake angle;
- upon said peripheral cutting edge forming a positive rake angle said peripheral cutting edge being configured as follows:
- (b) said peripheral cutting edge and said end face forming an angle, across a solid portion of said peripheral side surface between said peripheral cutting edge and said end face, at the intersection of said peripheral cutting edge and said end face;
- and
- said peripheral cutting edge angle comprising an acute angle configured to form a positive rake angle.
23 more elements
An end milling cutter comprising a central longitudinal axis about which said end milling cutter is to be rotated, said end milling cutter comprising:
- a shaft comprising an internal channel disposed in said shaft;
- an internal channel disposed in said shaft;
- said internal channel being configured to receive and guide chips produced during a cutting process;
- said internal channel being configured to be operatively connected to a suction device configured to create a suction force in said internal channel to suck chips produced during a cutting process through said internal channel;
- a milling head being disposed at an end of said shaft;
- said shaft comprises an outer diameter;
- said milling head comprises an outer diameter;
- the outer diameter of said shaft is smaller than said outer diameter of said milling head, at least in an area that borders said milling head;
- and
- said milling head comprising:
- an end face being disposed at an end of said end milling cutter and facing away from said shaft;
- said end face being substantially orthogonal to the longitudinal axis;
- said end face comprising a solid portion being substantially flat;
- a peripheral side surface disposed about the perimeter of said milling head;
- a cutting structure being configured to cut an object in a cutting process;
- said cutting structure configured to cut in a rotational cutting direction;
- and
- said cutting structure comprising:
- a face cutting edge being disposed to lie in said end face of said milling head;
- a peripheral cutting edge being disposed to lie in said peripheral side surface of said milling head;
- at least one of said cutting edges being configured to form a positive rake angle;
- upon said face cutting edge forming a positive rake angle, said face cutting edge being configured as follows:
- (a) said face cutting edge having a first portion and a second portion;
- said first portion of said face cutting edge disposed adjacent said peripheral side surface;
- said second portion of said face cutting edge disposed away from said peripheral side surface;
- said first portion of said face cutting edge being configured to be rotationally ahead of, in the rotational cutting direction, to precede rotationally, said second portion of said face cutting edge during use;
- upon said peripheral cutting edge forming a positive rake angle, said peripheral cutting edge being configured as follows:
- (b) said peripheral cutting edge having a first portion and a second portion;
- said first portion of said peripheral cutting edge disposed adjacent said end face;
- said second portion of said peripheral cutting edge disposed away from said end face;
- and
- said first portion of said peripheral cutting edge being configured to be rotationally ahead of, to precede rotationally, said second portion of said peripheral cutting edge during use.
29 more elements
An end milling cutter comprising a central longitudinal axis about which said end milling cutter is to be rotated, said end milling cutter comprising:
- a shaft comprising an internal channel disposed in said shaft;
- said internal channel being configured to receive and guide chips produced during a cutting process;
- said internal channel being configured to be operatively connected to a suction device configured to create a suction force in said internal channel to suck chips produced during a cutting process through said internal channel;
- a milling head being disposed at an end of said shaft;
- said shaft comprises a diameter;
- said milling head comprises a diameter;
- the diameter of said shaft is smaller than the diameter of said milling head, at least in an area that borders said milling head;
- and
- said milling head comprising:
- an end face being disposed at an end of said end milling cutter and facing away from said shaft;
- said end face being substantially orthogonal to the longitudinal axis;
- said end face comprising a solid portion being disposed substantially in a plane;
- a peripheral side surface disposed about the perimeter of said milling head;
- a cutting structure being configured to cut an object in a cutting process;
- and
- said cutting structure comprising:
- a face cutting edge being disposed to lie in said end face and substantially in the plane of said end face of said milling head;
- a peripheral cutting edge being disposed to lie in said peripheral side surface of said milling head;
- at least one of said cutting edges being configured to form a positive rake angle;
- upon said face cutting edge forming a positive rake angle, said face cutting edge being configured as follows:
- (a) said face cutting edge and said peripheral side surface forming an angle, across a solid portion of said end face between said face cutting edge and said peripheral side surface;
- said face cutting edge angle comprising an acute angle;
- said face cutting edge acute angle being configured to dispose said face cutting edge at a positive rake angle;
- upon said peripheral cutting edge forming a positive rake angle said peripheral cutting edge being configured as follows:
- (b) said peripheral cutting edge and said end face forming an angle, across a solid portion of said peripheral side surface between said peripheral cutting edge and said end face;
- said peripheral cutting edge angle comprising an acute angle to form a positive rake angle;
- and
- said peripheral cutting edge acute angle being configured to dispose said peripheral cutting edge at a positive rake angle.
25 more elements
Dependencies are inferred from the claim text.