What is it about?
Milling of curved surfaces using CNC machines is a common task in the manufacture of molds and dies of products used in various industrial sectors. In recent years, the use of milling for machining hardened parts has helped manufacturers to obtain these parts with shorter lead times. In this context, this work seeks to verify the influence of the feed direction of the ball nose radius tool when milling cylindrical surfaces on hardened parts. The final surface roughness and tool wear were analyzed.
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Why is it important?
It is important to investigate the relationship between the milling parameters and the part roughness so that the finishing milling operations are effectively the final machining stage, eliminating the need of polishing or electric discharge machining.
Perspectives
The paper concludes that the use of the downward direction strongly worsens the roughness of a cylindrical surface. Also, greater width of the wear mark at the tool tip was observed using the downward direction, which also showed vibration marks on the part. On the other hand, the use of the upward direction improves the roughness of a cylindrical surface, but using upward direction the surface roughness is worsened in the regions near the top of the cylindrical profile, that is, when the tool performs the cut with regions near the center of the spherical tip.
Ph.D. Joao Carlos Espindola Ferreira
Universidade Federal de Santa Catarina
Read the Original
This page is a summary of: Influence of feed direction on finishing milling cylindrical surfaces in H13 hardened steel, Journal of the Brazilian Society of Mechanical Sciences and Engineering, March 2019, Springer Science + Business Media,
DOI: 10.1007/s40430-019-1668-0.
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