振動粉砕におけるボールの最適充填量 (第1報)
1976 年 92 巻 1056 号 p. 83-89
詳細
1976 年 92 巻 1056 号 p. 83-89
As a first stage of the explanation of the optimum ball filling for vibratory reduction a fundamental conception was applied to vertical and declined oscillation of lying fixed cylindrical container, where two-dimensional ball movements and their two-dimensionally maximum throw orbits were refered to besides following assumptions:
(1) The maximum grinding effect may be expected if every realizable ball movement under given oscillating condition can be reproduced without any hindrance.
(2) The possibility of the ball movements in a container should be controlled by the mobility of the balls originated from the highest layer of the ball mass, which is to be regulated by the dimensions of the container considered as well as by the amount of the ball exist.
Two boundary conditions regarding to the throw time of the balls from the highest layer let assume the existence of two kinds of optimum ball filling in accordance with two kinds of interaction between grinding bodies.
As these two kinds of interaction should not be realized alone in the practical grinding process it is proper to regard some fillingsgrade between two boundary values based on the above two boundary conditions newly as an optimum fillingsgrade. It depends on the oscillating condition to be given and on the strength properties of the grinding material whose kind of interaction should be preferred in each case.
In the present instance the optimum ball filling for vertical oscillation was discussed both theoretically and experimentally, when a certain deduction was drawn also for declined oscillation.
