Acer Supra 2040PD, Operation Manual

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818~2040 PD
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5-8
Q. Perform several times of coarse grinding as desired. Grind out complete cutting marking until size
approaches to your desired value.
R. Fine sharpening on the grinding wheel.
S. Apply a dressing strip to slightly chamfer both sides of the grinding wheel, that reduces grinding wheel feed
lines on the workpiece.
T. Lower the grinding wheel until it just touches the workpiece surface and slight sparks occur. Then lower the
grinding wheel again by 0.0125~0.025mm to perform fine grinding.
U. Properly adjust the table cross feed speed to obtain the finish as you desired.
V. Perform
fine grinding.
W. Under the condition of without adjustment of downfeed, perform final cross feed grinding by reversing the
cross feed direction until sparks disappear. Also, make sure the grinding wheel leaves away the workpiece.
X. Close coolant, and then stop table movement.
Y. Keep grinding wheel running about half minute to completely remove coolant from the grinding wheel. Then
stop the machine.
Z. If only one surface grinding is required, release the magnetic chuck. Raise one side of the workpiece to
release magnetism, then remove the workpiece to avoid damage to the chuck surface. If you need to grind
the opposite side of workpiece, perform parallel surface grinding to your desired size, according to following
procedures.
5.3.2 PARALLEL SURFACE GRINDING ON A WORKPIECE
After the first surface grinding has been finished, you may use this surface as a
reference plane for grinding the parallel surface. If the grinding machine condition is
unchanged, the parallel surface can be fast and accurately ground to your desired size.
Grinding procedures are shown as below:
A.
After the first surface of workpiece grinding has been finished, turn the cross feed handwheel to move the
table away from the grinding wheel. Do not change the positions of the wheel head and the table reversing
dog.
B.
Apply a pencil to mark each side position of the morkpiece on the side of the magnetic chuck.
C.
Lift the workpiece on the magnetic chuck for removing all burrs.
D.
Thoroughly clean the magnetic chuck and workpiece.
E.
Measure the workpiece thickness, and determine the material removal amount.
F.
Place a thin paper on the magnetic chuck, and make sure the paper thickness is same as that for the first
surface grinding. .
G.
Place the workpiece on the magnetic chuck between the lines marked by the pencil, then increase magnetic
force.
H.
When the first surface has been ground and the wheel head position is unchanged, then the grinding wheel
can perform coarse grinding.
I.
Perform coarse grinding until the workpiece size approaches a tolerance of 0.025mm or 0.05mm to the final
size.
J.
Sharpen the grinding wheel.
K.
Perform slight grinding on the workpiece.
L.
Remove workpiece from the chuck, and then measure its thickness.
M.
Clean the chuck and workpiece. Mount the workpiece on the chuck again.
N.
Lower the wheel head to perform grinding until your desired size is obtained.