Invention Grant
- Patent Title: Powder metal forging and method and apparatus of manufacture
- Patent Title (中): 粉末金属锻造及其制造方法和装置
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Application No.: US12532561Application Date: 2008-04-01
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Publication No.: US09248503B2Publication Date: 2016-02-02
- Inventor: Alfred J. Chiesa , Hank J. Knott , David E. Lenhart
- Applicant: Alfred J. Chiesa , Hank J. Knott , David E. Lenhart
- Applicant Address: US MI Auburn Hills
- Assignee: GKN Sinter Metals, LLC
- Current Assignee: GKN Sinter Metals, LLC
- Current Assignee Address: US MI Auburn Hills
- Agency: Quarles & Brady LLP
- International Application: PCT/US2008/058980 WO 20080401
- International Announcement: WO2008/124378 WO 20081016
- Main IPC: B21D22/20
- IPC: B21D22/20 ; B22F5/08 ; B22F3/17

Abstract:
A method of forming a powder metal forging, which includes the steps of providing a preform including a sintered powder metal composition; inserting the preform in at least one part of a die set having a top die and a bottom die, at least one of the top die and the bottom die defining a helical forge form therewithin; closing the die set wherein the top die is contacting the bottom die; and compressing the preform in the forge form using an upper punch including a core rod and a lower punch, the compressing step occurring after the closing step, the compressing step resulting in a formed part having a helical outer surface. The method and apparatus of the present invention is particularly advantageous when forming a powder metal forging helical outer surface and an inner contour such as a cylindrical inside diameter.
Public/Granted literature
- US20100083782A1 POWDER METAL FORGING AND METHOD AND APPARATUS OF MANUFACTURE Public/Granted day:2010-04-08
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