There are lines on the machined parts of grinder

In the process of grinding machine processing, the surface of the workpiece often appears to have a ripple, which affects the accuracy and the appearance. According to experience, there are three situations:

There are irregular lines and scratches on the surface: This is mainly due to the problems of the grinding fluid and filtering system used, resulting in the particles and debris falling from the grinding wheel circulating in the grinding fluid to scratch the surface of the workpiece. At this time, the grinding fluid should be replaced or the filtering device should be added.

There are several reasons for the appearance of helix on the surface

1. When dressing the grinding wheel, the grinding wheel at the exit is convex, and the workpiece is just grinded to the surface by the convex point when it comes out of the grinding area, forming spiral pattern. The solution is that the grinding wheel at the exit can be trimmed more or the edge of the grinding wheel at the exit can be rounded with a file.
2. Small cracks appear in the alloy part of the tool plate supporting the workpiece, resulting in uneven surface and scuffing. The tool plate needs to be repaired or replaced.
3. The uneven bond hardness of grinding wheel leads to uneven wheel threshing. If the grinding wheel can not be improved after sanding, it is necessary to replace the grinding wheel.
4. The feeding speed or discharging speed is inconsistent with the normal speed of the guide wheel (it is easy to appear when there is an automatic feeding device). It is necessary to adjust the feed and guide wheel speed.
5. The relative position of the axis of the same grinding wheel deviates when the guide wheel is adjusted and R is hit, which needs to be re aligned.

Oscillation pattern on the surface: it is mainly caused by the vibration of the machine itself or the vibration in the grinding process of the workpiece.

1. The grinding wheel is clamped tightly, and the grinding wheel is not in stable operation. This requires new grinding wheel installation and balancing.
2. The bearing in the spindle is worn or improperly adjusted, which drives the grinding wheel to vibrate. The bearing clearance should be readjusted or replaced.
3. The vibration of other equipment is transmitted to the grinder to cause resonance, so it is necessary to keep away from other vibration sources or dig anti vibration ditch.
4. Due to the increase of the center height of the tool plate supported by the pad wood, the tool plate is not firm and vibrates when the workpiece passes through. The screws that hold the cutterhead need to be tightened.
5. The grinding wheel spindle is driven by the motor through the triangle belt. The length of the triangle belt is different or there is wear, which causes the vibration of the machine tool. Need to check and replace.
6. When the center of the workpiece is too high, the grinding wheel presses the workpiece to the cutter plate through grinding force, and the component force of the guide wheel is reduced, resulting in uneven force of the workpiece and vibration. At this time, lower the center height of the cutterhead.