Grinding Surface Treatment Technology of Bearing Parts
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| Time：2016.11.10 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
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Deep groove ball bearings as a result of the use and working conditions are different, there are many changes in its structure, but the basic structure is by the inner ring, outer ring, rolling body (ball) and the cage of four parts.
First, the inner ring (also known as the inner sleeve or inner ring). Usually fixed to the journal, the inner ring with the shaft rotation. The outer surface of the inner ring for rolling ball or roller groove, known as the inner groove or inner raceway.
Second, the outer ring (also known as jacket or outer ring). Usually fixed to the bearing housing or machine housing, play the role of supporting the ball rolling. The inner surface of the outer ring also has a groove for the ball or roller rolling, called the inner groove or inner raceway.
Third, the rolling body (ball). Each set of deep groove ball bearings are equipped with a group or groups of rolling elements, mounted between the inner and outer rings, the role of rolling transmission force. Rolling body is to bear the load of parts, its shape, size and number of bearing capacity to bear the ability to determine the performance of the high-speed operation.
Fourth, the cage (also known as retainers or isolators). The rolling elements in the bearing are evenly spaced from each other so that each rolling element rolls normally between the inner and outer rings
Bearing in precision grinding, due to rough demanding, the work surface of the grinding marks can often be observed with the naked eye surface grinding marks, mainly in the following: First, the performance of cross-spiral traces. The main reason for this traces is due to the poor straightness of the grinding wheel bus, there are convex phenomenon, in grinding, grinding wheel and the workpiece is only part of the contact, when the workpiece or wheel several times from the movement, the performance will reproduce the workpiece cross Spiral and visible to the naked eye. These helix pitch and the workpiece table speed, the size of the workpiece speed, but also with the grinding wheel axis and the table is not parallel to the rail.
(A) the main reason for the formation of bearing surface spiral
1. Wheel dressing bad, not chamfered corners, no use of coolant for dressing;
2. Guide rail guide lubricating oil too much, resulting in table floating;
3. Machine precision is not good;
4. Grinding pressure is too large and so on.
(B) the formation of the bearing helix has a cause
1. V-shaped rail rigid is not good, when the grinding wheel when the offset, but the edge of the wheel contact with the work surface;
2. Dressing wheel when the table for the speed of instability, precision is not high, so that the edge of a slightly trimmed wheel;
3. Rigidity of the workpiece itself is poor;
4. Grinding wheel is too broken off the grinding of the sand and the workpiece under the scrap iron surface attached to the wheel surface, this should be a good dressing wheel with a cooling water rinse or scrub clean;
5. Wheel dressing is not good, there are local bulge.
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