Curvature retaining device for plate-shaped workpiece, curvature retaining method for plate-shaped workpiece, and curvature forming method for plate-shaped workpiece
US-9802234-B2 · Oct 31, 2017 · US
Incremental forming method
US9522420B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9522420-B2 |
| Application number | US-201314390414-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 2, 2013 |
| Priority date | Apr 5, 2012 |
| Publication date | Dec 20, 2016 |
| Grant date | Dec 20, 2016 |
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- Title
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Abstract
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An incremental forming method includes pressing a rod-shaped tool into a workpiece and stretching the workpiece little by little while moving the rod-shaped tool so that a percentage of decrease in plate thickness of the workpiece after forming with respect to plate thickness of the workpiece before forming is made to be within a range of 35% to 40%, inclusive.
First claim
Opening claim text (preview).
What is claimed is: 1. An incremental forming method comprising: pressing a tip end of a rod-shaped tool into a metal plate with a pressing amount X; and stretching the metal plate little by little while moving the rod-shaped tool so that a percentage of decrease in plate thickness after incremental forming of the metal plate with respect to plate thickness before incremental forming of the metal plate is made to be within a range of 35% to 40%, inclusive, wherein the pressing amount X is equal to or less than 4.0 μm; the rod-shaped tool has a hemisphere shape at a tip end portion of the rod-shaped tool; a relationship among a radius of the tip end portion, a moving amount of one pass of the rod-shaped tool, and a pressing amount of the one pass of the rod-shaped tool is expressed by an expression X = R - R 2 - P 2 4 cos 2 θ where R represents the radius, P represents the moving amount, and X represents the pressing amount, and θ is an inclination of a direction in which the rod-shaped tool is moved with respect to a horizontal direction; and the radius of the tip end portion of the rod-shaped tool and the moving amount are set such that the pressing amount X is equal to or less than 4.0 μm.
Assignees
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Classifications
- B21D31/005Primary
Incremental shaping or bending, e.g. stepwise moving a shaping tool along the surface of the workpiece (B21D22/14 takes precedence) · CPC title
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Frequently asked questions
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- What does patent US9522420B2 cover?
- An incremental forming method includes pressing a rod-shaped tool into a workpiece and stretching the workpiece little by little while moving the rod-shaped tool so that a percentage of decrease in plate thickness of the workpiece after forming with respect to plate thickness of the workpiece before forming is made to be within a range of 35% to 40%, inclusive.
- Who is the assignee on this patent?
- Nonomura Kiyoshi, Kurozumi Koji, Inoue Koji, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification B21D31/005. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Dec 20 2016 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).