There are many strict constraints in the grinding process of internal grinder. First of all, it is very difficult to measure in practice or analyze according to the principle. The smaller the diameter of the workpiece hole is, the deeper the hole depth is, the more difficult the grinding process is.
This is due to different grinding machines and grinding methods, the thicker the grinding wheel shaft, the greater the rigidity of the grinder. However, the grinding wheel larger than the diameter of the workpiece and the grinding wheel beyond the length of the workpiece hole cannot be used in the internal grinding. However, when grinding with cylindrical grinder, it has nothing to do with the size of the workpiece, and the same size of grinding wheel can be used. However, due to the restriction of workpiece aperture, it is necessary to select grinding wheel and grinding wheel shaft according to the size of workpiece aperture.
Generally, the suitable diameter of the grinding wheel is about 0.8 times of the diameter of the workpiece, and the length of the grinding wheel shaft only needs to be slightly larger than the length of the hole. If the diameter of the grinding wheel is small, the circumferential speed will decrease, and the power will decrease due to the wear of the grinding wheel. If the length of the grinding wheel shaft is larger than the length of the hole, the power will definitely be lower and will cause oscillation. If the area of grinding wheel for internal grinding can not meet the requirements of the specification, the balance can not be maintained. If it is not balanced, it will swing due to the effect of centrifugal force at a speed higher than that of cylindrical grinding, which is a very dangerous appearance. If the use of too small grinding wheel will also reduce the grinding power.
It can be seen from the above that it is necessary to select the grinding wheel, fixture and grinding wheel shaft suitable for the hole diameter and hole depth. Due to the different manufacturers and shapes of grinding wheel shafts, the clamps installed on the top of grinding wheel shafts vary in size and length. However, when selecting the grinding wheel shaft, attention should be paid to the selection of universal grinding wheel shaft and fixture which can be used by any grinder.
Therefore, the grinding step of the internal grinder is obtained
1. First of all, we should consider and select a suitable grinding wheel.
2. Reasonable selection of fixture, determine the reciprocating interval and orientation of the worktable.
3. The key to dressing grinding wheel is the direction of dresser.
In order to prevent grinding problems, it is necessary to pay attention to: make the grinding wheel stop running, then add the dresser installed on the working table to the grinding wheel, close to the processing part of the workpiece, and then move the table to the position of the grinding wheel, and fix the dresser in this direction.
If the dresser is in contact with the grinding surface of the grinding wheel, the operation of the cutting control rod can be reduced. Because the grinding wheel used in internal grinder is small, it is necessary to adjust the height of dresser to the same position as the axis of grinding wheel, otherwise the normal operation will be affected due to the uncoordinated grinding wheel and dresser.
Before dressing, it is necessary to adjust the dresser diamond to coincide with the grinding wheel axis with the marking plate, and the following step is the same as that of cylindrical grinding. The selected back feed and feed rate can be used for longitudinal grinding.
On 2018-08-08 11:45:46
