Page 15 - Апрель

METALWORKING EQUIPMENT AND TOOLS

Analysis of the results shows that the best quality indicators are obtained by grinding
the splines with two wheels simultaneously with counter rotation (schemes 1 and 2) during the
forward stroke for both the surface processed by the upper and lower wheel. Further, in order of
decreasing quality, there are machining schemes 3 and 4, corresponding to separate grinding
with the upper and lower discs. The worst results are obtained by double-sided grinding, when,
during the forward stroke, the upper wheel grinds along the way, and the lower one - opposite
(schemes 5 and 6). On the diagrams of double-sided processing, the tool and work piece
surfaces are highlighted in dark tone, on which the vibration parameters were measured.
Table 1.
Indicators of surface quality of the inner diameter of the splined shaft for different methods of
grinding.

Test series Vibration spectrum indicators that The sum of ranked
number in determine the surface quality during positions (points)
descending grinding characterizing the Scheme processing
order of Аmax on 10 loss of surface
surface quality f=50Hz RMS � A quality (according to
i
3 criteria)
1
1 1.123 0.0097 11.495 1+2+3→6

2 1.925 0.0091 9.388 3+2+1→6

3 1.360 0.0154 8.625 2+4+1→7

4 2.160 0.0145 16.300 4+3+6→13

5 2.285 0.0157 15.385 5+5+5→15

6 2.248 0.0196 12.660 6+6+4→16

Stanochniy park 15