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Bearing in precision grinding, due to the rough demands were high, working surface appearance of grinding trace can often be observed with the naked eye the surface grinding marks mainly has following several.
Show cross spiral line traces
The reasons for this trace is mainly due to the bus straight wheel of existence, bump phenomenon, when in grinding, the grinding wheel and the workpiece is only part of the contact, when the workpiece or wheel several times back and forth movement, cross spiral line and the naked eye are reproduced in the workpiece performance will be observed. The helix pitch associated with the workpiece table speed, rotational speed of workpiece size, also with a grinding wheel axis and the guide rail is not parallel to the working table.
(a) the main reason for the formation of the spiral line
1 grinding wheel dressing is bad, not chamfered corner, without the use of cooling liquid dressing;
Guide table 2 guide lubrication oil too much, cause the work station floating;
3 the precision of the machine tool is not good;
4 the grinding pressure and so.
(two) has the reason of the formation of the spiral line
1.V rail not good rigidity, when grinding wheel grinding wheel edge offset, just contact with the working surface;
2 dressing noisy round table reversing speed, accuracy is not high, the grinding wheel is a slightly less edge trimming;
The 3 workpiece itself poor rigidity;
4 wheel broken too peeling off the sand and grinding of iron deposition in the grinding wheel on the surface, this should be trimmed grinding wheel with cooling water rinse or wash clean;
5 wheel dressing is not good, there is a local projection etc..