Die, joining tool and die production method
US-2016151825-A1 · Jun 2, 2016 · US
Hot-formed metal sheet and method of producing an opening in such a metal sheet
US11027325B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11027325-B2 |
| Application number | US-201715851297-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 21, 2017 |
| Priority date | Dec 22, 2016 |
| Publication date | Jun 8, 2021 |
| Grant date | Jun 8, 2021 |
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- Title
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Abstract
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A hot-formed metal sheet has a tensile strength Rm>1300 megapascal (MPa) and includes an opening which is produced by high-speed punching at a speed of a punch of more than 6 m/s in the absence of a counter holder of a contour matching a contour of the punch, with a smooth cut proportion of the cutting surface of the opening amounting to more than 50%.
First claim
Opening claim text (preview).
What is claimed is: 1. A method, comprising: hot forming and press hardening a metal sheet in a press-hardening tool to a tensile strength of Rm >1300 megapascal (MPa); and producing an opening with closed cutting line in the hot formed and press hardened metal sheet at the tensile strength Rm solely by high-speed punching the metal sheet in a single-step process with a punch at a speed of the punch of more than 6 m/s, sufficient to cause a momentary temperature rise in immediate proximity of the opening to at least minimize strain hardening and wherein the producing step is performed without the use of a counter holder. 2. The method of claim 1 , wherein the speed of the punch is less than 100 m/s and greater than 10 m/s. 3. The method of claim 1 , wherein the speed of the punch is less than 100 m/s and greater than 20 m/s. 4. The method of claim 1 , further comprising mounting the punch to a robotic arm for movement of the punch into a work position in relation to the metal sheet. 5. The method of claim 4 , further comprising securing the metal sheet to the robotic arm or to a further robotic arm in relation to the punch in the work position.
Assignees
Inventors
Classifications
Shoulder or burr prevention {, e.g. fine-blanking} · CPC title
by heating the blank or deep-drawing associated with heat treatment (C21D takes precedence) · CPC title
other parts for vehicles, e.g. cowlings, mudguards · CPC title
Machining or cutting being involved · CPC title
for die quenching · CPC title
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- What does patent US11027325B2 cover?
- A hot-formed metal sheet has a tensile strength Rm>1300 megapascal (MPa) and includes an opening which is produced by high-speed punching at a speed of a punch of more than 6 m/s in the absence of a counter holder of a contour matching a contour of the punch, with a smooth cut proportion of the cutting surface of the opening amounting to more than 50%.
- Who is the assignee on this patent?
- Benteler Automobiltechnik Gmbh
- What technology area does this patent fall under?
- Primary CPC classification B21D28/26. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jun 08 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).