Cargando…
Femtosecond Laser Trimming with Simultaneous Nanostructuring to Fine Piercing Punch to Electrical Amorphous Steel Sheets
A CVD (Chemical Vapor Deposition) diamond coated tungsten carbide (WC) and cobalt (Co) sintered alloy punch was trimmed by the femtosecond laser machining to sharpen its edge with about 2 μm and to simultaneously make nanostructuring to its side surface. In addition to the sharpened edge, its edge p...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8156874/ https://www.ncbi.nlm.nih.gov/pubmed/34067805 http://dx.doi.org/10.3390/mi12050568 |
_version_ | 1783699551730794496 |
---|---|
author | Aizawa, Tatsuhiko Shiratori, Tomomi Kira, Yoshihiro Yoshino, Tomoaki Suzuki, Yohei |
author_facet | Aizawa, Tatsuhiko Shiratori, Tomomi Kira, Yoshihiro Yoshino, Tomoaki Suzuki, Yohei |
author_sort | Aizawa, Tatsuhiko |
collection | PubMed |
description | A CVD (Chemical Vapor Deposition) diamond coated tungsten carbide (WC) and cobalt (Co) sintered alloy punch was trimmed by the femtosecond laser machining to sharpen its edge with about 2 μm and to simultaneously make nanostructuring to its side surface. In addition to the sharpened edge, its edge profile was formed to be homogeneous enough to reduce the damage layer width by piercing the electrical amorphous steel sheet stack. Each brittle sheet in the stacked work was damaged to have three kinds of defects by piercing; e.g., the droop-like cracking in the thickness and at the vicinity of hole, the wrinkling in peak-to-valley with partial cracking on the peaks, and the circumferential cracking. When using the WC (Co) punch with the inhomogeneous edge profile in the sharpened edge width, these three damages were induced into each sheet and the maximum damage width exceeded 80 μm. When using the punch with the sharpened edge and homogeneous edge profile, the wrinkling mode was saved and the total affected layer width was significantly reduced to less than 20 μm. Through the precise embossing experiments, this effect of punch edge profile condition to the induced damages was discussed with a statement on the nanostructuring effect on the reduction of damaged width in electrical amorphous steel sheets. The developed tool with the sharpened edge and homogenous edge condition contributes to the realization of a low iron loss motor with a reduced affected layer width. |
format | Online Article Text |
id | pubmed-8156874 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-81568742021-05-28 Femtosecond Laser Trimming with Simultaneous Nanostructuring to Fine Piercing Punch to Electrical Amorphous Steel Sheets Aizawa, Tatsuhiko Shiratori, Tomomi Kira, Yoshihiro Yoshino, Tomoaki Suzuki, Yohei Micromachines (Basel) Article A CVD (Chemical Vapor Deposition) diamond coated tungsten carbide (WC) and cobalt (Co) sintered alloy punch was trimmed by the femtosecond laser machining to sharpen its edge with about 2 μm and to simultaneously make nanostructuring to its side surface. In addition to the sharpened edge, its edge profile was formed to be homogeneous enough to reduce the damage layer width by piercing the electrical amorphous steel sheet stack. Each brittle sheet in the stacked work was damaged to have three kinds of defects by piercing; e.g., the droop-like cracking in the thickness and at the vicinity of hole, the wrinkling in peak-to-valley with partial cracking on the peaks, and the circumferential cracking. When using the WC (Co) punch with the inhomogeneous edge profile in the sharpened edge width, these three damages were induced into each sheet and the maximum damage width exceeded 80 μm. When using the punch with the sharpened edge and homogeneous edge profile, the wrinkling mode was saved and the total affected layer width was significantly reduced to less than 20 μm. Through the precise embossing experiments, this effect of punch edge profile condition to the induced damages was discussed with a statement on the nanostructuring effect on the reduction of damaged width in electrical amorphous steel sheets. The developed tool with the sharpened edge and homogenous edge condition contributes to the realization of a low iron loss motor with a reduced affected layer width. MDPI 2021-05-17 /pmc/articles/PMC8156874/ /pubmed/34067805 http://dx.doi.org/10.3390/mi12050568 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Aizawa, Tatsuhiko Shiratori, Tomomi Kira, Yoshihiro Yoshino, Tomoaki Suzuki, Yohei Femtosecond Laser Trimming with Simultaneous Nanostructuring to Fine Piercing Punch to Electrical Amorphous Steel Sheets |
title | Femtosecond Laser Trimming with Simultaneous Nanostructuring to Fine Piercing Punch to Electrical Amorphous Steel Sheets |
title_full | Femtosecond Laser Trimming with Simultaneous Nanostructuring to Fine Piercing Punch to Electrical Amorphous Steel Sheets |
title_fullStr | Femtosecond Laser Trimming with Simultaneous Nanostructuring to Fine Piercing Punch to Electrical Amorphous Steel Sheets |
title_full_unstemmed | Femtosecond Laser Trimming with Simultaneous Nanostructuring to Fine Piercing Punch to Electrical Amorphous Steel Sheets |
title_short | Femtosecond Laser Trimming with Simultaneous Nanostructuring to Fine Piercing Punch to Electrical Amorphous Steel Sheets |
title_sort | femtosecond laser trimming with simultaneous nanostructuring to fine piercing punch to electrical amorphous steel sheets |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8156874/ https://www.ncbi.nlm.nih.gov/pubmed/34067805 http://dx.doi.org/10.3390/mi12050568 |
work_keys_str_mv | AT aizawatatsuhiko femtosecondlasertrimmingwithsimultaneousnanostructuringtofinepiercingpunchtoelectricalamorphoussteelsheets AT shiratoritomomi femtosecondlasertrimmingwithsimultaneousnanostructuringtofinepiercingpunchtoelectricalamorphoussteelsheets AT kirayoshihiro femtosecondlasertrimmingwithsimultaneousnanostructuringtofinepiercingpunchtoelectricalamorphoussteelsheets AT yoshinotomoaki femtosecondlasertrimmingwithsimultaneousnanostructuringtofinepiercingpunchtoelectricalamorphoussteelsheets AT suzukiyohei femtosecondlasertrimmingwithsimultaneousnanostructuringtofinepiercingpunchtoelectricalamorphoussteelsheets |