cast iron grinding plate
Lapping finish is a precision
machining process, in which a thin layer will be removed from the working surface
of the cast iron plate by using grinding tools and abrasives. According to the
process method, lapping method can be divided into wet lapping, dry lapping and
semi-dry lapping. Dry lapping, also know as embedded emery lapping, is the
common used finishing method for cast iron surface plate.
三板互研法：所謂三板互研法是指三塊平板互相之間依次互研，并且每塊平板只能當下板兩遍，實際共研磨6遍。使用這種方法壓砂的好處是，三塊研磨平板的平面度都很好，三塊研磨平板的壓砂效果基本一樣，并且三塊研磨平板都可以使用，不用經(jīng)常壓砂，缺點是加工時間長且每次加工必須制作三塊相同的鑄鐵平板才能完成整個加工，也就是說制作一塊研磨平板的成本和制作三塊研磨平板的成本是一樣的。
Three-piece Lapping
Technique:
This type of lapping,
involves three lapping plates, in which the three plates are supposed to
lapping mutually in proper order and each plate to be lapped at the bottom
POSTTTION just for two times. So the total lapping times is 6. This type of lapping can ensure all the three
plates achieve good flatness and similar
sand embedded effect. But it always take a long lapping time and much more
cost.
二板互研法：也叫子母板壓法，這種方法是只用兩塊研磨平板一上一下互研。用這種方法研磨壓砂結(jié)果是，兩塊平板的平面度基本吻合，上面平板的平面度凹，下板的平面度凸，并且下板的壓砂效果要比上板的好。由于上板中間凹，不容易修理量塊，一般不用上板，只用下板這一塊平板。
Two-piece Lapping Technique:
This type of lapping just
require two plates to grind mutually. Embedded sand by this method will ensure
the flatness of these two plates are coincided. The flatness and embedded sand
effect of lower plate are better than
the upper one. So we just use the lower plate.
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