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US 6,688,817 B2Granted
Drill for drilling, a method for making a drill for drilling, and a cutting tool
AssigneeKennametal Inc.
InventorsBernhard Walter Borschert, Dieter Hermann Mühlfriedel, Karl-Heinz Wendt
Life of this patent
Estimating the term…
Abstract
A method of making a drill comprising a tip (16), a shank (10) and a flute area having chip spaces (12, 14) formed therein, the drill being substantially completely coated with a hard material, and is characterized by applying an abrasive material to merely the tip (16) before coating the drill with the hard material. The drill may more particularly be a solid carbide drill.
Claims20
A drill for drilling, said drill comprising:
- a shank;
- said shank being configured to be mounted in a chuck mechanism to drive said drill;
- a fluted portion;
- a conical tip portion;
- said fluted portion being disposed between said shank and said conical tip portion;
- said fluted portion and said conical tip portion comprising one material throughout;
- said fluted portion comprising at least one chip flute which extends longitudinally along the length of the flute portion;
- said conical tip portion comprising at least one cutting edge;
- said at least one cutting edge being configured to cut into an object to be drilled;
- said at least one chip flute being configured to guide chips produced by cutting an object with said at least one cutting edge;
- said fluted portion comprising a first section disposed adjacent said conical tip portion and a second section disposed adjacent said shank;
- said first section, said second section, and said conical tip portion each comprising at least one surface;
- said at least one surface of said conical tip portion having a plurality of pits formed in said one material to form a first surface roughness;
- said at least one surface of said first section having a plurality of pits formed in said one material to form a second surface roughness;
- said at least one surface of said second section having a third surface roughness;
- each of said first surface roughness and said second surface roughness being greater than said third surface roughness;
- and
- each of said at least one surface of said conical tip portion, said at least one surface of said first section, and said at least one surface of said second section being coated with a material which is harder than said one material of said drill.
15 more elements
A drill for drilling, said drill comprising:
- a shank;
- said shank being configured to be mounted in a chuck mechanism to drive said drill;
- a fluted portion;
- a conical tip portion;
- said fluted portion being disposed between said shank and said conical tip portion;
- said fluted portion and said conical tip portion comprising essentially one material throughout;
- said fluted portion comprising at least one chip flute which extends longitudinally along the length of the flute portion;
- said conical tip portion comprising at least one cutting edge;
- said at least one cutting edge being configured to cut into an object to be drilled;
- said at least one chip flute being configured to guide chips produced by cutting an object with said at least one cutting edge;
- said fluted portion comprising a first section disposed adjacent said conical tip portion and a second section disposed adjacent said shank;
- said first section, said second section, and said conical tip portion each comprising at least one surface;
- said at least one surface of said conical tip portion having a plurality of pits formed in said one material to form a first surface roughness;
- said at least one surface of said first section having a plurality of pits formed in said one material to form a second surface roughness;
- said at least one surface of said second section having a third surface roughness;
- at least one of said first surface roughness and said second surface roughness being greater than said third surface roughness;
- and
- each of said at least one surface of said conical tip portion, said at least one surface of said first section, and said at least one surface of said second section being coated with a material which is harder than said one material of said drill.
15 more elements
A method for making a drill for drilling, said drill comprising a shank;
- said shank being configured to be mounted in a chuck mechanism to drive said drill;
- a fluted portion;
- a conical tip portion;
- said fluted portion being disposed between said shank and said conical tip portion;
- said fluted portion and said conical tip portion comprising essentially one material throughout;
- said fluted portion comprising at least one chip flute which extends longitudinally along the length of the fluted portion;
- said conical tip portion comprising at least one cutting edge;
- said at least one cutting edge being configured to cut into an object to be drilled;
- said at least one chip flute being configured to guide chips produced by cutting an object with said at least one cutting edge;
- said fluted portion comprising a first section disposed adjacent said conical tip portion and a second section disposed adjacent said shank;
- said first section, said second section, and said conical tip portion each comprising at least one surface;
- said at least one surface of said conical tip portion having a first surface roughness;
- said at least one surface of said first section having a second surfaQe roughness;
- said at least one surface of said second section having a third surface roughness;
- each of said first surface roughness and said second surface roughness being greater than said third surface roughness, said method comprising the steps of:
- projecting abrasive particles at each of:
- said at least one surface of said conical tip portion, and
- said at least one surface of said first section, and
- thus impinging upon said each of:
- said at least one surface of said conical tip portion, and
- said at least one surface of said first section,
- with said abrasive particles, and
- thus producing a plurality of pits in said each of:
- said at least one surface of said conical tip portion, and
- said at least one surface of said first section, and
- thus forming a surface roughness on said each of:
- said at least one surface of said conical tip portion, and
- said at least one surface of said first section,
- whereupon each of said first surface roughness and
- said second surface roughness is greater than said third surface roughness.
27 more elements
A cutting tool for cutting, said cutting tool comprising:
- a driven portion;
- said driven portion being configured to be mounted on or in a mechanism to drive said cutting tool;
- a tool body portion;
- a cutting portion;
- said tool body portion and said cutting portion comprising essentially one material throughout;
- said tool body portion being disposed between said driven portion and said cutting portion;
- said cutting portion comprising at least one cutting edge;
- said at least one cutting edge being configured to cut into an object;
- said tool body portion comprising a first section disposed adjacent said cutting portion and a second section disposed adjacent said driven portion;
- said first section, said second section, and said cutting portion each comprising at least one surface;
- said at least one surface of said cutting portion having a plurality of pits formed in said one material to form a first surface roughness;
- said at least one surface of said first section having a plurality of pits formed in said one material to form a second surface roughness;
- said at least one surface of said second section having a third surface roughness;
- and
- at least one of said first surface roughness and said second surface roughness being greater than said third surface roughness.
12 more elements
A method for making a cutting tool for cutting, said cutting tool comprising a driven portion;
- said driven portion being configured to be mounted on or in a mechanism to drive said cutting tool;
- a tool body portion;
- a cutting portion;
- said tool body portion and said cutting portion comprising essentially one material throughout;
- said tool body portion being disposed between said driven portion and said cutting portion;
- said cutting portion comprising at least one cutting edge;
- said at least one cutting edge being configured to cut into an object;
- said tool body portion comprising a first section disposed adjacent said cutting portion and a second section disposed adjacent said driven portion;
- said first section, said second section, and said cutting portion each comprising at least one surface;
- said at least one surface of said cutting portion having a first surface roughness;
- said at least one surface of said first section having a second surface roughness;
- said at least one surface of said second section having a third surface roughness;
- and at least one of said first surface roughness and said second surface roughness being greater than said third surface roughness, said method comprising the steps of:
- projecting abrasive particles at at least one of:
- said at least one surface of said cutting portion, and
- said at least one surface of said first section, and
- thus impinging upon said at least one of:
- said at least one surface of said cutting portion, and said at least one surface of said first section,
- with said abrasive particles, and
- thus producing a plurality of pits in said at least one of:
- said at least one surface of said cutting portion, and
- said at least one surface of said first section, and
- thus forming a surface roughness on said at least one of:
- said at least one surface of said cutting portion, and
- said at least one surface of said first section,
- whereupon at least one of said first surface roughness and said second surface roughness is greater than said third surface roughness.
23 more elements
Dependencies are inferred from the claim text.