錐の切削力に就て及び工具研磨機の新考案
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概要
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For measuring the cutting force exerted on a drill very accurately, the authors have attempted to apply the piezoelectricity to this problem, and invented a new apparatus. Firstly, by means of this apparatus, how the twisting moment undergoes quantitative changes during the whole process of drilling the sample plate of a determinate thickness made of every kind of metals such as mild steel, copper, bronze, brass, aluminium, zinc, tin and lead was observed ; and it was ascertained that the twisting moment suddenly increasing at the instant of the drill tip piercing through the back of the plate is proportional to the twisting moment revealed during the earlier stage. Again, the changes of those two kinds of twisting moments according to the diameter and the feed were also examined for all those specimens above mentioned. Nextly, the changes of the thrust during the drilling process were examined for the said specimens, and the manner of dependence of the thrust upon the diameter and the feed was also tested. Lastly, the changes of the twisting moments according to the magnitude of the drill angle were measured for several kinds of metals. Diminishing 10 degrees each time from 140 degrees to begin with, the twisting moment diminished rather rapidly at first, but the rate of falling gradually decreased. One of the most essential conditions in carrying out the comparative tests of the cutting force of tools is to grind a great number of them to a similar form very accurately. As a round nose tool presents special difficulties for grinding, the authors devised and put into shape, as a trial, a new contrivance for a small grinder to be used in a laboratory.
- 社団法人日本機械学会の論文
- 1928-08-20
社団法人日本機械学会 | 論文
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