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压砂平板的打磨质量应以能在最短时间内稳定地达到量块最后要求的光洁度和使用寿命这两项指标来衡量。 1.平板工作面应分为粗、中、细、精各区域,各区之间粗细相差程度要适当; 2.打磨平板时,先从精研区打磨起,然后依次打磨细、中、粗区域。打磨精研区域应保证试研时,手上能感到有明显的切削力,当光洁度一旦达到要求,即应停止打磨, 3.打磨平板时,油石的运动应如图所示作纵向螺旋形移动,各区域的交界处(图中的ab段)应尽可能狭窄一些。
The grinding quality of the sand compacted sand plate should be measured by the two indexes of finish and service life which can reach the final requirement of the gauge block stably in the shortest time. 1. The flat face should be divided into coarse, medium, fine, fine areas, the extent of the difference between the extent of the appropriate area; 2. When grinding flat, polished from the lapping area, and then polished fine, medium and thick areas . Polishing lapping area should ensure that trial trial, the hands can feel significant cutting force, once the finish once meet the requirements, that should stop grinding, 3. Grinding plate, the stone movement should be as shown in the longitudinal spiral movement , The boundaries of the regions (ab in the figure) should be as narrow as possible.