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US 11,661,903 B2Granted
Forming near-net shape single-piece piston blanks
AssigneeKs Kolbenschmidt US, Inc.
InventorsDavid J. Boye, Bryan Quinn, Joseph Stojkov, Joshua Cota, Scott D. Bailey
Life of this patent
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Abstract
A one-piece piston blank of near-net shape wherein the piston blank has a flange disposed opposite a skirt, the flange being spin-bendable to form a cooling channel with reduced preliminary removal of material relative to conventional forged piston blanks.
Claims1
A one-piece piston blank of near-net shape formed by:
- heating a billet (20);
- while heated, shaping the billet (20) by at least one hit in a die;
- allowing cooling of the shaped billet (20);
- heating a pre-flange portion (32, 26) of the shaped billet while maintaining a skirt portion (33, 25) at a temperature sufficiently cool to retain its shape;
- and
- upsetting a pre-flange portion (36) of the billet to form a flange (48, 58, 68), thereby forming a near-net shape piston blank (40, 50, 60),
- wherein the flange (48, 58, 68) of the piston blank is disposed opposite a skirt (45, 55, 65), the flange (48, 58, 68) being spin-bendable to form a cooling channel (67) with reduced preliminary removal of material relative to conventional forged piston blanks.
4 more elements
Dependencies are inferred from the claim text.