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US 6,402,438 B1Granted
Composite Cutting Tool
AssigneeAlvord-Polk, Inc.
InventorRonald E. Boyer
Life of this patent
Estimating the term…
Abstract
A laser beam is directed onto a bonding surface of a steel tool body to form a molten melt pool. Particles of high speed steel alloy are flowed into the melt pool and melt in the melt pool. The laser beam is moved along the bonding surface to form solid lines of high speed steel laser cladding metallurgically bonded to the cutter portion at the bonding surface and to each other. The cladding is abraded to form the cutting edge of a composite cutting tool.
Claims39
A composite cutting tool comprising:
- (a) a tool body formed from a metal having a first hardness, said body including a mounting portion and a cutting portion having one or more bonding surfaces;
- and
- (b) one or more cutters, each cutter formed from metal laser cladding having a second hardness greater than said first hardness, each cutter joined to the tool body at a bonding surface, a solidified melt pool at each bonding surface, each pool including a mixture of said tool body metal and said laser cladding metal and having a greater concentration of said tool body metal adjacent the mounting portion than away from the mounting portion, the laser cladding in each cutter including two formed surfaces intersecting at a cutting edge.
A composite rotary cutting tool comprising:
- (a) a rotary metal tool body formed from a first alloy of either a low carbon steel or low grade high speed steel, the tool body having a rotary axis and including a cylindrical mounting portion on the axis adapted to be held by a chuck, the mounting portion having a first hardness, and a cutting portion axially spaced from the mounting portion and including one or more bonding surfaces each extending along the axis;
- and
- (b) one or more shaped metal cutters, each cutter integrally joined to the cutting portion at a bonding surface and formed from high speed steel alloy laser cladding having a second hardness greater than said first hardness, a metallurgical bond between said cladding and the cutting portion at the bonding surface, each cutter including two abraded surfaces extending along the axis and intersecting at a cutting edge extending along the axis, each cutting edge facing in the same circumferential direction around the axis.
A composite cutting tool comprising:
- (a) a metal tool body formed from a first alloy of either a low carbon steel or low grade high speed steel, the tool body including a mounting portion adapted to be held by a machine tool, and having a first hardness, and a cutting portion including one or more bonding surfaces;
- and
- (b) one or more metal cutters, each cutter comprising a body of laser cladding and including at least a first line of laser cladding extending along a bonding surface, said laser cladding formed from a high speed steel alloy having a second hardness greater than said first hardness, a solidified melt pool at the bonding surface, the solidified melt pool forming a first metallurgical bond between said laser cladding and the cutting portion, said metallurgical bond including a mixture of said first alloy and said high speed steel alloy and having a greater concentration of said first alloy adjacent the mounting portion than away from the mounting portion, each cutter including two formed surfaces on the laser cladding and intersecting at a cutting edge.
Dependencies are inferred from the claim text.