Plug for hot pipe making
US-9283600-B2 · Mar 15, 2016 · US
Mandrel
US9862016B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9862016-B2 |
| Application number | US-201615060101-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 3, 2016 |
| Priority date | Mar 4, 2015 |
| Publication date | Jan 9, 2018 |
| Grant date | Jan 9, 2018 |
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- Title
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- Abstract
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- Assignees and inventors
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- Key dates
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- First independent claim
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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
Provided is a mandrel which is inserted into a pipe material when the pipe material is bent, the mandrel including: a core member having a rod-shaped main body portion and a small-diameter portion which is provided on one end side of the main body portion and which is thinner than the main body portion; and a front end member which is provided on one end side of the core member and which is formed integrally with the core member so as to cover the small-diameter portion.
First claim
Opening claim text (preview).
The invention claimed is: 1. A mandrel which is inserted into a pipe material when the pipe material is bent in a bending machine, the mandrel comprising: a core member having a rod-shaped main body portion and a small-diameter portion which is provided on one end side of the main body portion and which is thinner than the main body portion; and a front end member which is provided on one end side of the core member and which is formed integrally with the core member so as to cover the small-diameter portion, wherein each of the core member and the front end member is made of a solid structure configured to prevent fluid flow through the core member and the front end member, the core member is formed so as not to come off the bending machine at the time of bending, the small-diameter portion has a groove portion, and the front end member is formed on the core member so as to fill the groove portion and come into close contact with the small-diameter portion with no space therebetween, and to keep the front end member from coming off in case of an action of a force in a direction to release the front end member from the small-diameter portion at the time of bending. 2. The mandrel according to claim 1 , wherein the front end member is a resin member formed by injection molding. 3. The mandrel according to claim 1 , wherein the front end member is a ceramic member formed by sintering. 4. The mandrel according to claim 1 , wherein a diameter D 1 of the main body portion and a diameter D 2 of the small-diameter portion satisfy D 2 ≈D 1 /2. 5. The mandrel according to claim 1 , wherein the front end member is made of a resin.
Assignees
Inventors
Classifications
Selection of materials · CPC title
Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor {; Construction of, or alloys for, mandrels or plugs} · CPC title
Rolling basic material of solid, i.e. non-hollow, structure; Piercing {, e.g. rotary piercing mills} · CPC title
- B21D9/073Primary
with one swinging forming member · CPC title
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Frequently asked questions
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- What does patent US9862016B2 cover?
- Provided is a mandrel which is inserted into a pipe material when the pipe material is bent, the mandrel including: a core member having a rod-shaped main body portion and a small-diameter portion which is provided on one end side of the main body portion and which is thinner than the main body portion; and a front end member which is provided on one end side of the core member and which is for…
- Who is the assignee on this patent?
- Mitsubishi Aircraft Corp
- What technology area does this patent fall under?
- Primary CPC classification B21D9/073. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 09 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).