ショアかたさ試験機について : ダイヤモンドハンマの寿命

概要

論文の詳細を見る
In several new and old, domestic and foreign-made Shore hammers, the fixing of diamond in steel bodies was investigated by means of X ray photographs which showed us the interior of hammers clearly. And the influence of these fixing methods on the accuracy of hardness measurement and the life of hammers were discussed. And then, four of these hammers, which were alternately employed in the same tester of D type, were used repeatedly for many thousands of hardness measurements of hard materials. Two of these hammers were built up with taper, and the others with caulking. No different effect could be found between such two fixing methods, but it was estimated that diamond hammers would be damaged within about 1 000 times of hardness measurements for tangsten carbide, after 10 000 or more for chilled cast iron, and then more than 40 000 for hardened steel.
一般社団法人日本機械学会の論文
1958-03-25