Effects of material microstructure on surface roughness and burr formation in micromilling: A review
Authors: Duc Truong Pham, Stefan Dimov, Krastimir Popov, Ahmed Elkaseer
Abstract
Micromilling concerns the machining of parts with features that range from tens of micrometres to a few millimetres in size, with chiploads usually varying from below one micron to a few microns. Due to the fact that most commonly used materials have crystalline grains similar in size to chiploads, the cutting process sometimes takes place inside the individual grain itself. This phenomenon can be considered one of the main differences between microcutting and macrocutting. Recently it has been revealed that microstructure, especially grain size, has a dominant effect on the quality of the machined part. So far, there has been no detailed study of the influences of microstructure in the micromilling of polycrystalline materials. This paper reviews previous work on this topic.
Special attention is given to surface finishes and burrs, as these are important issues for micro machined parts. The paper concludes with a summary of some of the key research problems in micromilling and suggests a systematic study of the effects of microstructure on surface generation and burr formation in the micromilling of polycrystalline materials.
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Dear author,
I found a very tiny error in this paper.
Let's say it is a micro error.
2.1 Material microstructure processing
line 4.
Refinementof
Refinement of
Regards,
Xuedong
@Can you explane more about the Burr types appearing in fig 3 and the direction of the feed.
Because tool is rooling(rotation) when it cut metal.
At the same time, tool is moving(translation) as well.
So the matal was contacted by diffrent part of the tool in different way and cause different type of burrs.
Dear Mohamed,
Thank you for interests. Regarding Fig. 3, usually we have two cases, moving tool in X and Y direction or moving WP in X and Y direction which is more common with moving the tool in Z direction. So, in Fig. 3 assume that the WP moves in the feed dirction( X or Y) as shown from the arrow, in the begining whihle the tool start cutting the burs form in this edge called entrance burr and the opposite in the other edge called exit burr. For the second part ( side edges) while the cutting tool rotating in the clockwise direction
( in our case ) so the left side is cut first so, due to the feed value in this side start from zero so the milling process called up-milling and the burrs formed called top burr up milling and the opposite for the burrs formed in the right side. I think it is now clear and Iam waitting for any other comments.
Dear Xuedong,
Thank you for your comment and we will do recycle our product and avoid this micro error.
Can you explane more about the Burr types appearing in fig 3 and the direction of the feed. Thank you.