Analysis: Common knowledge of bearing grinding

Source: China Bearing Network Time: 2017-12-03

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The key factors that can maximize the grinding wheel's grinding function are good shaping and sharpening (known as trimming) and skillful trimming. In fact, an operator with high quality trimming and skillful grasping of the grinding wheel tips; The grinding wheel has a high grinding function. It is not only relying on the acquisition of the so-called good grinding wheel. This is very important; because the workshop can not be operated according to each person; equipped with a special grinding wheel.
The sharpening is a sharp process of grinding the abrasive grains of the super-hard abrasive grinding wheel. In this process, the bonding agent between the abrasive grains and the blunt grinding wheel abrasive particles need to be removed; The grinding wheel is excellent in bonding agent; it forms a sharp cutting edge. It is also necessary to remove the fine material from the outer surface of the grinding wheel; to prevent the grinding force from increasing on the grinding wheel; the grinding force on the grinding wheel is increased. Large; will cause oscillations and form parts to burn.
There is no proper sharpening; even the best grinding wheels are not able to achieve high quality and dimensional consistency of the machined parts. In fact; when you fund a high quality grinding wheel; in order to achieve a high grinding function; They are very important.
Shaping can be said to be part of the preparation work of the grinding wheel; it is carried out together with the sharpening of the usual grinding wheel. Regarding the super-hard abrasive grinding wheel; the two processes are separated; the grinding wheel is first shaped. In the grinding with superabrasive grinding wheel; Plastic surgery is carried out using plastic objects or rollers; sharpening is often a trimming rod using a ceramic bond; after shaping is completed; the grinding wheel is sharpened.
Before the grinding wheel contains shaping and sharpening trimming; it is important to ensure that the spindle bearing is at a certain temperature (such as the normal grinding wheel grinding condition). This will prevent damage to the shape of the part and the abnormal wear of the grinding wheel and trimming. It is necessary to take care of the things used for dressing; because it is usually made of hard, wear-resistant but brittle diamond material; and it is very sensitive to small bumps and crushing due to slight bumps and forces.
Because the diamond shaper itself is a tool; it needs to be very sharp. Use a blunt trimming to trim the surface of the wheel; it will make the wheel blunt. In order to adhere to a high-quality and sharp diamond dressing; every certain moment Need to rotate a single point or a tapered tip with 1/8 turns. The number of rotations can be determined according to the trim condition; according to the experience; at least once a day. About the chisel head and the shaped trimming; usually before they are blunt Rotate once at 180Â°.
Most cylindrical grinding machines place parts and grinding wheels on a horizontal line. The highest point of the outer circle of the part and the highest point of the outer circle of the grinding wheel are called parts/wheel touch points; diamond trimming should be able to touch the parts/wheels as close as possible Trimming the grinding wheel at the point. Regarding the grinding wheel for the internal grinding machine; it is more important to trim the diamond to the highest point of the outer circle of the grinding wheel (ie, the part/wheel touch point when grinding the hole);
Adopting micro-trimming to reduce the finishing time; it seems that there is always a kind of temptation to choose a large depth of repair. This is an extreme fault. It is necessary to select the most suitable repair depth to trim the grinding wheel. The depth of the repair; high cutting temperatures will occur; the service life of the dresser will be reduced; and the useful wheel layer will be cut off. The end result is damage to both the dresser and the grinding wheel;
The best dressing amount is after several repairs; it can not only recover the shape of the grinding wheel; but also the principle of outstanding grinding edge.
Use a single point to trim things; you should touch the diameter direction of the grinding wheel with a 10-15o axis line skew angle. This will make the single point trimming things change at the timing; a sharpening effect occurs. The multi-touch trimming thing does not The demand is skewed from this point of view. Instead, the entire end face of the trimmed object is touched with the outer surface of the grinding wheel.

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