在一般工厂里,磨削使用的砂轮,常常由于生产条件的限制,如受到砂轮紧圈或法蘭盤的直径、工件的形状、磨床的类型等的限制,还没有用到砂轮可用的限度,就不能再继续使用了。这些不能再用的砂轮,通常是送到砂轮制造厂,把它打碎了作制造砂轮的原料。这样来利用废砂轮,当然不能算是很合理的方法,因为还没有充分地利用这些废砂轮。在莫斯科斯大林汽车工厂里,为了充分利用这些废砂轮,成立了一个废砂轮翻新组。翻新组按照砂累分类表来改变废砂轮的尺寸和规格,使这 Grinding wheels used in general factories are often limited by the manufacturing conditions, such as the restriction of the diameter of the grommet or flange, the shape of the workpiece, the type of the grinder, etc., and the available limits of the grinder have not been used, Can not continue to use. These unusable grinding wheels, usually sent to the wheel manufacturing plant, break it up as the raw material used to make the grinding wheel. It is certainly not a reasonable way to utilize the waste wheel in this way because the waste wheels have not been fully utilized. In Moscow Stalin car factory, in order to make full use of these waste wheel, set up a waste wheel refurbishment group. Renovation group in accordance with the sand tired classification table to change the size and size of the waste wheel, so that