Method and means for heat treating cutting tools
OwnerGeoffrey Philip Fisher, Richard Mark Lill +4inventors
InventorsGeoffrey Philip Fisher, Richard Mark Lill, Edgar Dabill, Martin John Monaghan, Jonathan Clifford Oates, Graham Monteith Smith
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Abstract
Apparatus for heat treating a cutting tool comprises a furnace and a tool holder within the furnace adapted to receive therein a first portion of the tool, a second portion of the tool projecting from the tool holder, the second portion of the tool being directly exposed to radiant heat from at least one radiant heating element within the furnace with the first portion of the tool being shielded from the radiant heat.
Claims19
Apparatus for heat treating a cutting tool having a first portion and a second portion, the apparatus comprising a furnace, a tool holder within the furnace and adapted to receive therein the first portion of the tool, with the second portion of the tool projecting from the tool holder, and at least one radiant heating element within the furnace, the second portion of the tool being directly exposed to radiant heat from said element, and the first portion of the tool being shielded from said radiant heat.
A method of heat treating a cutting tool having first and second portions to harden the tool, the method comprising the steps of directly exposing the first portion of the tool to a source of radiant heat in a furnace to raise the temperature of said first portion to an elevated value, and shielding a second portion of the tool from said source of radiant heat to maintain it at a temperature lower than the elevated temperature of the first portion.
Dependencies are inferred from the claim text.