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The reason why the bearing forms a spiral defect in the grinding process
Source: China Bearing Network Time: 2013-02-08
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The bearing is in the grinding process; the surface of the work is ground by a high-speed rotating grinding wheel; therefore, if it is not operated and adjusted according to the operation instructions during grinding, it will present various shortcomings in the bearing operation; The overall quality of the bearing. The bearing is in the fine grinding; because the rough demand is very high; the grinding marks on the exterior of the work can often be observed with the naked eye. The appearance of the grinding marks is mainly the following. The embodiment presents the interlacing spiral traces. The reason for the trace is that the busbar of the grinding wheel is poor in flatness; there is a concave-convex appearance; during grinding; the grinding wheel and the workpiece are only some touch; when the workpiece or the grinding wheel reciprocates several times; And the naked eye can observe. The pitch of these spirals is related to the workpiece table speed and the workpiece rotation speed; together with the grinding wheel axis line and the worktable guide rail are not parallel.
ㄒ唬┞èªå’ å‚» å‚» å‚» é¥•é¢ 1. The grinding wheel is poorly trimmed; the corners are not chamfered; the coolant is not trimmed,
2. The workbench guide guides too much lubricating oil; causing the workbench to float.
3. The machine tool accuracy is not good,
4. Grinding pressure is too large.
Ǘ┞èªå’ å‚» silly wood å’›é€¶é¢ 1. The V-shaped guide rail is not well rigid; when grinding, the grinding wheel is offset; only the edge of the grinding wheel and the touch of the work surface,
2. When the quarrel is repaired, the commutation speed of the workbench is unstable; the precision is not high; the trimming of the grinding wheel is slightly less,
3. The workpiece itself is poorly rigid,
4. The sand on the grinding wheel with the broken and too falling off and the iron scrap under the grinding of the workpiece are attached to the outer surface of the grinding wheel; for this purpose, the finished grinding wheel should be washed or rinsed with cooling water.
5. The dressing of the grinding wheel is not good; there are some bulges, etc. The main reason for the appearance of the scale-like appearance of the fish scale-like appearance is that the cutting edge of the grinding wheel is not sharp; the phenomenon of "squatting" occurs during grinding;
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