Please use this identifier to cite or link to this item:
http://acervodigital.unesp.br/handle/11449/8993
- Title:
- Surface finishing of flat pieces when submitted to lapping kinematics on abrasive disc dressed under several overlap factors
- Universidade Estadual Paulista (UNESP)
- 0141-6359
- Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
- In machining of pieces that require surface finishing levels finer than grinding can offer, it is necessary to use specific finishing processes. However, these processes, which have lapping as the most classic representative, are usually difficult to setup and demand much time in setting the large number of variables. This paper discusses the investigation of an abrasive process for finishing of flat workpieces based on the combination of important grinding and lapping characteristics. Instead of loosing abrasive grains between the workpiece and the lapping plate, a resinoid grinding wheel of hot-pressed silicon carbide is fixed on the plate of a device resembling to a lapping machine. The grinding wheel is dressed with a single-point diamond for maintaining its form flat and mainly for interfering in the workpieces surface finishing by varying of the overlap factor (Ud). It was noticed that the studied process can simplify the setup and make it easier than in lapping, which is a painstaking process. The surface roughness values and flatness deviations showed to be comparable to those achieved in lapping, or even better. The best surface roughness and flatness deviation found were Ra = 0.8 nm and 0.4 mu m with Ud = 3, respectively. The workpiece material was made of quenched and tempered SAE 4340 steel, reaching a hardness of 60 HRC. The process was also monitored by acoustic emission (AE), which indicates to be a promising and suitable technique to housed in this process. Compared to lapping, there is an additional advantage of a less contaminated workpiece surface with a shiny appearance. (C) 2010 Elsevier B.V. All rights reserved.
- 1-Apr-2011
- Precision Engineering-Journal of The International Societies For Precision Engineering and Nanotechnology. New York: Elsevier B.V., v. 35, n. 2, p. 355-363, 2011.
- 355-363
- Elsevier B.V.
- Overlap factor
- Lapping
- Grinding
- Surface roughness
- Flatness
- http://dx.doi.org/10.1016/j.precisioneng.2010.09.012
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/8993
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.