Method for producing a ring with a toothing
US-10493517-B2 · Dec 3, 2019 · US
Forging tool for the manufacture of a shaped rolled ring, notably for the manufacture of a turbomachine disc
US2016339504A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016339504-A1 |
| Application number | US-201515114918-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 2, 2015 |
| Priority date | Feb 5, 2014 |
| Publication date | Nov 24, 2016 |
| Grant date | — |
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Abstract
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Mandrels for rolling a ring include recesses for receiving the ring, which have rounded parts at the connection between the various faces, so as to avoid the formation of sharp angles on the rolled ring and the accidental formation of cracks.
First claim
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1 - 10 . (canceled) 11 . A rolling tool for a part in the form of a ring, comprising two mandrels turning about axes parallel to each other and each comprising a circular recess for receiving the ring, the recesses comprising a bottom face and lateral faces, wherein the bottom face of each of the mandrels is connected to the lateral faces by curved portions having radii of curvature of between 10 mm and 20 mm. 12 . The rolling tool according to claim 11 , wherein the radii of curvature are between 12 and 15 mm. 13 . The rolling tool according to claim 11 , wherein the bottom face is cylindrical or conical, defined by a rectilinear generatrix, and the lateral faces are conical, defined by rectilinear generatrices. 14 . The rolling tool according to claim 11 , wherein the curved portions, which have a concavity opening up towards the outside of the recesses, connect the lateral faces by a profile with no angle. 15 . A method for manufacturing a turbomachine disc, comprising a blank step by rolling, where in the disc arrives in the form of a ring, a cross section of which is reduced by the rolling, wherein said step is performed by a tool comprising two mandrels turning about axes parallel to each other and each comprising a circular recess for receiving the ring, the recesses comprising a bottom face and lateral faces wherein the bottom face of each of the mandrels is connected to the lateral faces by curved portions having radii of curvature of between 10 mm and 20 mm, the ring having an essentially polygonal cross section and comprising corners situated on the curved portions, and also curved during the method. 16 . The method for manufacturing a turbomachine disc according to claim 15 , wherein the disc is an alloy based on nickel. 17 . The method for manufacturing a turbomachine disc according to claim 16 , wherein the disc is an alloy based on nickel and chromium. 18 . The method for manufacturing a turbomachine disc according to claim 17 , wherein the disc is a Rene 65 super alloy. 19 . The method for manufacturing a turbine disc according to claim 17 , wherein the disc is an AD730 super alloy. 20 . The method for manufacturing a turbine disc according to claim 15 , wherein the ring has a diameter of between 300 mm and 1500 mm.
Assignees
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Classifications
- B21H1/06Primary
rings of restricted axial length (extending closed shapes of metal bands by simultaneous rolling at two or more zones B21B5/00) · CPC title
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Frequently asked questions
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- What does patent US2016339504A1 cover?
- Mandrels for rolling a ring include recesses for receiving the ring, which have rounded parts at the connection between the various faces, so as to avoid the formation of sharp angles on the rolled ring and the accidental formation of cracks.
- Who is the assignee on this patent?
- Snecma
- What technology area does this patent fall under?
- Primary CPC classification B21H1/06. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Nov 24 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).