What is the solution to the common problems of automatic double-end surface grinder?

The treatment methods for common problems of automatic double-end grinding machine are as follows:

Grinding is the process of extrusion, sliding, plowing and chip separation of abrasive grains on the surface of the workpiece. The whole process is accompanied by the friction of abrasive grains on the surface of the workpiece, especially during double-sided grinding. The grinding area is large, the friction resistance increases, and the heat generated by friction also increases, which is easy to generate high temperature. The high temperature generated by friction is also concentrated in the place where the wear debris gathers, which causes the local metal structure on the surface of the workpiece to anneal and shrink, forming a concave shape, and the surface color turns purple, resulting in grinding injuries.

Fully automatic double-end grinding machine: The key to solving grinding injuries is to choose a suitable grinding wheel. The grinding wheel should have appropriate hardness, neither can it lose too quickly, but also have strong self-sharpening, so as to reduce the frictional resistance generated during the grinding process. The second is that the grinding wheel should have good chip removal performance, and the second is that the cutting fluid should give full play to its cooling effect. In addition, if the grinding is only slightly injured (there is a small area of bright spots on the surface of the workpiece), the speed of the grinding wheel can be appropriately reduced to reduce the cutting force and solve the problem of workpiece injury.

1. Part taper

The taper of the workpiece can be adjusted or put waterproof paper on the wheel surface shedding plate guided by the machine tool; check whether the bearing of the machine tool guide wheel is too loose.

2. Edge grinding and subsidence (multiple corner grinding)

Fully automatic double-end grinding machine: There are many reasons for the collapse of the grinding edge, which are related to the relative positions of the reference base plate, reference grinding wheel, guide pressure plate and the grinding angle of the grinding wheel.

First of all, it is necessary to check and adjust the grinding angle of the grinding wheel as described above, so as to avoid the concentration of the grinding amount on a certain part of the grinding wheel during grinding, and maintain the uniformity of the grinding force when the workpiece is ground by the grinding wheel, so as to achieve layered separation. The purpose of step grinding.

Second, check and adjust the parallelism of the entrance and exit datum base plate with the right grinding wheel and the height difference between them. Adjust the proper clearance between the entry and exit reference base plates of the guide platen to allow the workpiece to pass freely without interference, while also ensuring that it is not deflected.

In addition, the positional relationship of the reference grinding wheel is also very important, it should be 0.02-0.03mm higher than the outlet reference substrate. It is necessary to check the flatness of the grinding surface of the grinding wheel. Since the linear velocity of the grinding wheel gradually decreases to zero from the outer edge to the center, the outer edge consumes quickly and is prone to protrusions, so the grinding wheel needs to be trimmed to maintain the flatness of the surface.

3. Smoothness

Poor surface finish when grinding parts with automatic double-end surface grinder may be caused by the following factors: the middle height of the part is not high; too little grinding area is reserved for the part; the vibration of the grinding wheel is too large; the quality of the guide wheel of the machine tool is not high; Whether there is floating oil on the surface of the cutting and grinding fluid of the grinding machine or whether the quality has changed.

4. Workpiece thickness deviation

When the thickness deviation of the workpiece after grinding is large and cannot meet the quality requirements, the angle of the grinding wheel should be checked.

Fully automatic double-end surface grinding machine: The thickness deviation in the width direction of the workpiece should be different from the upper and lower openings in the vertical direction of the grinding wheel. If there is a thickness deviation in the length direction, it should be because the angle of the grinding wheel is too large or too small, or the reverse adjustment (the entrance is smaller than the exit). Therefore, if thickness deviation occurs, please adjust the angle.

5. Roundness of parts.

The roundness of the parts is not ideal, and the middle height of the parts is not high; observe whether the grinding sound, cutting sound, and fire center of the automatic double-end surface grinding machine are abnormal; whether the machine tool shakes abnormally during grinding and cutting.