研削音の研究
歯科用ポイントによる研削
1964 年 30 巻 355 号 p. 629-636
詳細
1964 年 30 巻 355 号 p. 629-636
In this paper, are studied both of the properties and the generation mechanism of the sound produced by a dental point grinding operation.
As work-pieces to be operated, we take up the three kinds of pieces such as glass, iron and aluminium. (The glass piece has a homogeneous enamellike property of tooth and the elastic properties of both iron and aluminium become almost equal to that of glass.) The experimental results obtained are as follows.
(1) The grinding sound are caused by both the vibration of the work-piece and that of the dental point.
(2) For the case of glass glinding, the power of the sound generated from the work-piece vibration becomes larger than that generated from the dental point vibration, but for both cases of iron and aluminium grindings the sound power relation-becomes reverse to the case of glass grinding.
(3) The power of the grinding sound has no relation with the magnitude of the depth of cut of the dental point and it becomes proportional to the grinding efficiency defined by the cut volume in unit time in the grinding operation.
In this paper, the sound generation mechanism is also treated theoretically by using the property of the cutting abrasives distributed at random on the surface of the dental point and moreover by putting some simple assumptions on both the vibration and the sound radiation conditions of the work-piece.
