Cutting cast-iron milling machine

An inspection of the CoM charts for the bonded and the cast-iron machines shows clearly that the former was dynamically superior to the latter. For instance, in the case of down-milling the CoM of the bonded machine ranged between 12 and 28 N/m as compared to 1-10-5 N/m. For up-milling, the respective ranges of the CoM were 8-29-5 as compared to 1-10-5 N/m. For very shallow cuts and y/ = 60° the cast-iron machine had a slightly better performance but for any other conditions the bonded machine was considerably better. 

Fig. 1.28(a) and (b) respectively. For up-milling, the RIC factor ranges from 10% at shallow cuts to about 500% at deep cuts. For down-milling, the RIC varies between 200% and 680%. Table 1.7 summarises experimental and theoretical results which are of prime interest from the practical point of view in assessing the bonded machine in relation to the cast-iron one. 

Chang, H. C., Sadek, M. M. and Tobias, S. A., Relative assessment of the dynamic behaviour and cutting performance of a bonded and a cast iron horizontal milling machine, 83-Prod-10. Presented at the ASME Design and Production Engineering Technical Conference, Dearborn, Michigan, Sept. 11-14, 1983. Published in Trans. ASME (Journal of Engineering for Industry). 

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