Abstract A process for producing a cutting tool having a rake face and flank face which intersect to form a cutting edge, which cutting tool comprises a substrate consisting of a sintered hard metal and a coating film provided thereon consisting of a material with a higher hardness than the substrate, which method involves subjecting the substrate to a coating treatment and honing treatment in such a manner that the coating film near the cutting edge has such a thickness that the thickness continuously increases in directions away from the cutting edge along both the rake face and the flank face from a minimum value, including zero, at the cutting edge, such that the thickness of the coating at the rake face reaches a maximum thickness at a first distance from the cutting edge and the thickness at the flank face reaches a maximum thickness at a second distance from the cutting edge, wherein the first distance is greater than the second distance.
A process for the production of a cutting tool having a rake face and a flank face which intersect to form a cutting edge, said cutting tool comprising a substrate consisting of a sintered hard metal and a coating film provided thereon consisting of a material with a higher hardness than the substrate, which comprises subjecting the substrate to a coating treatment and honing treatment in such a manner that said coating film near the cutting edge has such a thickness that the thickness continuously increases in directions away from the cutting edge along both the rake face and the flank face from a minimum value, including zero, at the cutting edge, such that the thickness of the coating at the rake face reaches a maximum thickness at a first distance from the cutting edge and the thickness at the flank face reaches a maximum thickness at a second distance from the cutting edge, the first distance being greater than the second distance.
Claim 2
Dependent Claim
163 words
A process for the production of a cutting tool having a rake face and a flank face which intersect to form a cutting edge, said cutting tool comprising a substrate consisting of a sintered hard metal and a coating film provided thereon consisting of a material with a higher hardness than the substrate, which comprises subjecting the substrate to a coating treatment and honing treatment in such a manner that said coating film near the cutting edge has such a thickness that the thickness continuously increases in directions away from the cutting edge along both the rake face and the flank face from a minimum value, including zero, at the cutting edge, such that the thickness of the coating at the rake face reaches a maximum thickness at a first distance from the cutting edge and the thickness at the flank face reaches a maximum thickness at a second distance from the cutting edge, the first distance being greater than the second distance.
Claim 3
Dependent Claim
66 words
The process of claim 1, wherein the honing treatment is carried out by arranging a number of the coated substrates on a rotary disk in such a manner that the rake faces are faced above and pushing a revolving elastic grindstone against the edge parts of the coated substrate from the side of the rake face, thereby simultaneously lapping the rake face and the flank face.
Claim 4
Dependent Claim
26 words
The process of claim 2, wherein the elastic grindstone is selected from the group consisting of buffs and brushes consisting of a resin with grinding grains.