Abstract
For the purpose of investigating the machinability of aluminum in comparison with other metals, following experiments were performed under the same conditions for all samples. Cutting tests were conducted on 4 sorts of metals; i.e., aluminum (99.5%), copper (99.6%), magnesium (99.9%), and carbon steel (C 0.25%) (in the above metals, each figure of % represents its purity) under the conditions of cutting speed of 100-400m/min., feed of 0.04-0.32mm/rev., and depth of cutting of 1.3mm by means of SHOUN KSA Type cutting dynamometer, dynamic strain meter, and electric recorder.
The following results were obtained.
(1) The increasing order of the measured values of cutting force was arranged as follows: Hg<Al<Fe_??_Cu (in which copper was the largest).
(2) It was observed that cutting force in copper or aluminum decreased with the increase of cutting speed or the decrease of feed; however, the force in magnesium was scarcely affected by cutting speed or feed.
(3) It would be estimated that the value of cutting force was less than a half of that of copper or nearly twice as great as that of magnesium.
(4) The increasing order of cutting ratio was arranged as follows: Al_??_Cu<Fe<Hg (in which aluminum was the smallest).
