Acer Supra 818PD, Operation Manual

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818~2040 PD
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5-10
圖
(C)
A workpiece is clamped on the angle plate Grind the first side surface
5.4.5 GRINDING SIDE OR END SURFACE OF WORKPIECE
Adjacent surfaces grinding procedures: Once the workpiece is clamped on the angle
plate, you can perform grinding on the first side surface and its adjacent surface. Grinding
procedures are shown as below:
A.
Raise the wheel head until it positions at 12.5mm above the workpiece top.
B.
If automatic table cross feed device is used, properly adjust the table reversing dog position, so that the
grinding wheel center may leave away workpiece about 25mm at each end.
C.
Turn the cross feed handwheel, so that the grinding wheel side overlaps with workpiece side about
3mm.
D.
Start the machine running. Lower the wheel head until it just touches the workpiece and a small amount
of sparks occur.
E.
Turn the cross feed handwheel to move the workpiece from the grinding wheel.
F.
To prevent the grinding wheel from touching the lowest point on the workpiece surface, it is suggested to
raise the grinding wheel about 0.125mm.
G.
Manually feed table until the workpiece completely feed through the rotating grinding wheel. Try to find
the highest point on the workpiece. Once the highest point is found, raising the grinding wheel again
about 0.125mm.
H.
Grind the side surface of workpiece until all cutting marks have been completely ground out. Suggested
coarse grinding depth each time is 0.075mm~0.175mm, and fine grinding depth is
0.0125mm~0.025mm.
I.
Once the first side surface grinding is finished, stop the machine shown as above right figure. Remove
the clamp at the right side of workpiece.
J.
Disconnect magnetic force of the chuck. Remove the angle plate and workpiece assembly. Note that do
not change the workpiece mounting condition.
K.
Thoroughly clean the magnetic chuck and the angle plate.
L.
Place the clamped workpiece and the angle plate end surface on the magnetic chuck. Keep the
adjacent surfaces to be ground at top shown as above right figure.
M.
Use two clamps to clamp the workpiece and the angle plate, shown as above right figure.
N.
Remove the two clamps located at the top of workpiece.
O.
If necessary, use two additional clamps, however make sure they do not interfere against grinding
operations.
P.
Repeat steps 1~8 for grinding the second side surface until they achieve accurate squareness.
Q.
Remove the angle plate and workpiece assembly from the magnetic chuck. Then remove workpiece
from the angle plate.