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System and method of making a forged part

  • US 9,724,748 B2
  • Filed: 08/11/2014
  • Issued: 08/08/2017
  • Est. Priority Date: 08/11/2014
  • Status: Active Grant
First Claim
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1. A method of making a forged part comprising:

  • forming a workpiece into a toothless drive pinion that has a stem and an enlarged head that extends from the stem with a first die unit that is disposed in a first press that has a press bolster and a press ram that is moveable with respect to the press bolster,wherein the first die unit has a first die assembly that has a first die and a first punch, a second die assembly that has a second die and a second punch, and a third die assembly that has a third die and a third punch, the first punch, the second punch, and the third punch being disposed on the press ram,wherein the first punch engages the workpiece to form a protrusion hub at an end of the workpiece, the protrusion hub being formed inside a first punch cavity of the first punch that is received inside the first die,the second punch receives the protrusion hub in a second punch cavity of the second punch that is received inside the second die, andthe third die is partially received inside a third punch cavity of the third punch, wherein the third punch cavity receives the protrusion hub and forms the enlarged head adjacent to the protrusion hub;

    transferring the toothless drive pinion from the first die unit to a tooth forming die unit that is disposed in a second press; and

    forming the toothless drive pinion into the forged part by forming a set of teeth on the enlarged head with the tooth forming die unit.

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