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US 2004/0183239 A1Published application
Apparatus for softening a selected portion of a steel object by heating
AssigneeA. Finkl & Sons Co.
InventorsCharles W. Finkl, Algirdas A. Underys
Life of this patent
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Abstract
Apparatus for softening a selected portion of a steel object which comprises subjecting the selected portion to electrical energy derived from induction heating or infrared heating to a controlled depth, preferably just sufficiently deep to soften said portion but not sufficiently deep to soften the remainder of the part.
Claims10
Apparatus for reducing cracking at the body-shank junctions of a hardened die block, said apparatus including, in combination
- an electric heat source in close proximity to the body-shank junction portion of the die block,
- said electric heat source being arranged to direct heat to the body-shank junction portion of the die block, and in an amount such that the body-shank portion, only, of the die block is softened to a level at which subsequent cracking at a shank-body junction of the die block is substantially eliminated, and
- means for confining the heat from the electric heat source to the body-shank junction portion of the die block.
Apparatus for softening a selected portion of a steel object which includes, in combination
- a source of infrared heating,
- means for subjecting said selected portion to electrical energy derived from said source of infrared heating,
- means for maintaining said selected portion and said source of infrared heating in fixed relationship to one another during subjection of said selected portion to said source of infrared heating, and
- means for controlling the depth in the steel object to which the infrared heating is applied
- whereby the selected portion is softened to the desired extent but the remainder of the steel object is not so softened.
2 more elements
Dependencies are inferred from the claim text.