
335Modern Abrasive Processes
In typical two-way ow, the workpiece is hydraulically clamped between
two vertically opposed media cylinders. Material is removed by the ow of
a semisolid abrasive compound through a restrictive passage formed by a
work part/tooling combination (Figure 10.34). This causes the media viscos-
ity to temporarily rise. The abrasive grains are held tightly in place at this
point and the media acts as a grinding stone that conforms to the passage
geometry. Consequently, the media slug uniformly abrades the walls of the
extrusion passage. Media viscosity returns to normal after the slug passes
through the restricted area. ...