Poly(methyl methacrylate) Coating of Titanium Workpieces to Reduce Burrs in Micro-drilling
Department of Mechanical and Industrial Engineering, University of Brescia, 25136 Brescia, Italy
Micromachines 2019, 10(12), 838; https://doi.org/10.3390/mi10120838
Received: 31 October 2019 / Revised: 26 November 2019 / Accepted: 28 November 2019 / Published: 30 November 2019
(This article belongs to the Section D:Materials and Processing)
A technique to reduce burr height in titanium micro-drilling is presented: a poly (methyl methacrylate) coating was applied before machining on the upper and lower surfaces of a titanium specimen (0.5-mm thick). After drilling, a cleaning process (acetone bath) was executed to eliminate the coating, and holes with less burr were obtained. The coating process was executed with a spin-coating machine. To test the efficacy of the technique, two different coating thicknesses (7.9 and 5.4 μm) and two drill bits (0.25- and 0.5-mm diameter) were evaluated. Qualitative and quantitative analyses of the holes obtained were performed with scanning electron microscopy and three-dimensional microscopy, respectively. The results highlight the efficacy of the technique to reduce the burr height by 70% in coated titanium relative to that in an uncoated titanium sheet.
View Full-Text
Keywords:
micro-drilling; burr reduction method; spin coating
▼
Show Figures
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
MDPI and ACS Style
Giorleo, L. Poly(methyl methacrylate) Coating of Titanium Workpieces to Reduce Burrs in Micro-drilling. Micromachines 2019, 10, 838.
Show more citation formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.