Heat treatment method for ring-shaped member and heat treatment equipment for ring-shaped member
US-2016230243-A1 · Aug 11, 2016 · US
Method for thermally treating ring-shaped member
US10508318B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10508318-B2 |
| Application number | US-201415022650-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 8, 2014 |
| Priority date | Sep 30, 2013 |
| Publication date | Dec 17, 2019 |
| Grant date | Dec 17, 2019 |
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- Title
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Abstract
Official abstract text for this publication.
When a plurality of outer rings (R) are sequentially and inductively heated to a target temperature by energizing a heating coil ( 2 ) elongated more than each of the plurality of outer rings (R), which are made of steel and retained coaxially by a retaining unit ( 3 ), while relatively moving the outer rings (R) and the heating coil ( 2 ) in an axial direction, an output of the heating coil ( 2 ) is varied in consideration of the number of outer rings (R) present in an opposing region of the heating coil ( 2 ).
First claim
Opening claim text (preview).
The invention claimed is: 1. A heat treatment method for a ring-shaped member, the heat treatment method comprising a heating step of sequentially and inductively heating a plurality of ring-shaped members to a target temperature by energizing a heating coil elongated more than each of the plurality of ring-shaped members, which are made of steel and retained coaxially with each other, while relatively moving the plurality of ring-shaped members and the heating coil in an axial direction of each of the plurality of ring-shaped members, the heating step comprising: an output increasing step of increasing an output of the heating coil each time a number of the ring-shaped members present in an opposing region of the heating coil increases by one; and an output decreasing step of decreasing the output of the heating coil each time the number of the ring-shaped members present in the opposing region of the heating coil decreases by one. 2. The heat treatment method for a ring-shaped member according to claim 1 , wherein an output increase pattern of the heating coil in the output increasing step and an output decrease pattern of the heating coil in the output decreasing step are different from each other. 3. The heat treatment method for a ring-shaped member according to claim 1 , further comprising a cooling step of cooling one of the ring-shaped members inductively heated to the target temperature. 4. The heat treatment method for a ring-shaped member according to claim 1 , wherein each of the ring-shaped members is made of steel having a carbon content of 0.8 mass % or more.
Assignees
Inventors
Classifications
Oils · CPC title
- C21D9/40Primary
for rings; for bearing races · CPC title
Special methods of manufacture · CPC title
Induction heating · CPC title
with induction hardening · CPC title
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- What does patent US10508318B2 cover?
- When a plurality of outer rings (R) are sequentially and inductively heated to a target temperature by energizing a heating coil ( 2 ) elongated more than each of the plurality of outer rings (R), which are made of steel and retained coaxially by a retaining unit ( 3 ), while relatively moving the outer rings (R) and the heating coil ( 2 ) in an axial direction, an output of the heating coil ( …
- Who is the assignee on this patent?
- Ntn Toyo Bearing Co Ltd, HIRAYAMA Eri, Hiraoka Tsuneaki, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C21D9/40. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 17 2019 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).