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Method for producing gears

  • US 4,709,569 A
  • Filed: 05/02/1983
  • Issued: 12/01/1987
  • Est. Priority Date: 02/25/1981
  • Status: Expired due to Fees
First Claim
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1. A method of producing a spur or bevel gear of low to medium carbon level carbon or allow steel comprising the steps of:

  • (a) providing a properly sized, shaped and cleaned billet of a given low to medium carbon level carbond or ally steel having a carbon content of not more than 0.30%;

    (b) heating the billet in a minimum oxidizing environment to a preselected temperature falling in the range of 0.069-0.71 for the homologous temperature ratio of the billet material;

    (c) locating the heated billet in a first die member on a forging machine;

    (d) precision forging the billet while substantially at said preselected temerature by engaging the heated billet with a second die member complementary with the first die member in a single forge flow to form a gear precision preform;

    (e) removing the preform and allowing the preform to cool in air to substantially ambient temperature; and

    (f) machining less than 0.060 inch of material from the exterior functional surfaces of the cooled preform without subjecting the cooled preform to any heat treating operation prior to said machining.

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