Method for producing a ring with a toothing
US-10493517-B2 · Dec 3, 2019 · US
Method for manufacturing ring-rolled product
US11077481B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11077481-B2 |
| Application number | US-201615779772-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 1, 2016 |
| Priority date | Dec 3, 2015 |
| Publication date | Aug 3, 2021 |
| Grant date | Aug 3, 2021 |
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- Title
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Abstract
Official abstract text for this publication.
A method for manufacturing a ring-rolled product forms the ring-rolled product from a ring material by using a mandrel roll and a main roll. The mandrel roll and the main roll are configured so as to contact inner and outer circumferential surfaces of the ring material, respectively, and are configured so as to press the ring material in a radial direction thereof in a state in which the ring material is rotated in a circumferential direction thereof. The method includes a step of rolling the ring material that includes an operation of induction-heating the main roll by at least one induction heating element and rolling the ring material between the mandrel roll and the main roll, which is induction-heated.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for manufacturing a ring-rolled product, the method forming a ring-rolled product from a ring material by using a mandrel roll and a main roll, the mandrel roll and the main roll being configured so as to contact inner and outer circumferential surfaces of the ring material respectively in a state in which the ring material is rotated in a circumferential direction thereof, the mandrel roll and the main roll being configured so as to press the ring material in a radial direction thereof, comprising: a step of rolling the ring material, this step including an operation of induction-heating a contact portion of a circumferential surface of the main roll which contacts the outer circumferential surface of the ring material by at least one induction heating element to a temperature of not less than 100 degrees C. and less than the softening temperature of a material of the main roll, and rolling the ring material between the mandrel roll, and the main roll which is induction-heated. 2. The method for manufacturing a ring-rolled product according to claim 1 , wherein in the step of rolling, the main roll is induction-heated during rolling of the ring material. 3. The method for manufacturing a ring-rolled product according to claim 2 , wherein in the step of rolling, the induction heating of the main roll is started before start of the rolling of the ring material, and the induction heating of the main roll is performed so as to heat the contact portion of the main roll to a temperature of not less than 100 degrees C. and less than the softening temperature of a material of the main roll, in a period from three minutes to two hours in a stage before start of the rolling of the ring material. 4. The method for manufacturing a ring-rolled product according to claim 1 , wherein in the step of rolling, the main roll is induction-heated by the at least one induction heating element so as to heat the make a contact portion of the main roll to a temperature of not less than 300 degrees C. and less than the softening temperature of the material of the main roll, in a period from 15 minutes to two hours, and the rolling of the ring material is carried out after stop of the induction heating. 5. The method for manufacturing a ring-rolled product according to claim 1 , wherein in the step of rolling, an edge-shaped contact portion of a circumferential surface of the main roll which contacts an edge-shaped portion formed on an outer circumferential side region of the ring material, is induction-heated.
Assignees
Inventors
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
externally · CPC title
Heating the product · CPC title
Extending closed shapes of metal bands by rolling (manufacture of circular shapes, e.g. wheel rims, B21H1/06) · CPC title
Large applications, e.g. bearings having an inner diameter exceeding 500 mm · CPC title
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- What does patent US11077481B2 cover?
- A method for manufacturing a ring-rolled product forms the ring-rolled product from a ring material by using a mandrel roll and a main roll. The mandrel roll and the main roll are configured so as to contact inner and outer circumferential surfaces of the ring material, respectively, and are configured so as to press the ring material in a radial direction thereof in a state in which the ring m…
- Who is the assignee on this patent?
- Hitachi Metals Ltd
- 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 Tue Aug 03 2021 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).