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Compensation method for CNC Vertical Internal Grinder grinding wheel dressing

Apr 07, 2021

The consistency of the workpiece size of CNC Vertical Internal Grinder depends on the consistency of the state of the process system to a large extent. After the grinding wheel is trimmed once, the thickness of the abrasive is reduced, and the end face of the grinding wheel changes to the designated calibration position, which leads to a change in the state of the entire process system, and the size of the workpiece to be processed will also change, which cannot guarantee dimensional consistency. Therefore, the compensation after dressing of the grinding wheel is particularly important.

Analyzing the process of dressing the grinding wheel is the mutual grinding of two abrasive tools. Not only the thickness of the grinding wheel will be reduced, but the thickness of the dressing wheel will also be reduced, which is the result of a comprehensive effect. Therefore, the method of multiple tests was adopted to determine the compensation method of the grinding wheel dressing.

Because the hardness and wear resistance of diamond grinding wheels are much greater than GC cup-shaped dressing wheels. It is foreseeable that in a dressing process, the reduced abrasive thickness of the diamond grinding wheel is much smaller than the reduced abrasive thickness of the dressing wheel. The position of the dressing wheel is fixed. During dressing, the grinding wheel advances by a dressing amount in the feed direction. Due to the mutual grinding effect, the thickness of the grinding wheel and the dressing wheel are reduced at the same time. The relationship between them is: dressing amount = grinding wheel reduction, dressing wheel reduction. In order to ensure the dimensional consistency of the workpiece to be processed, the reduction of the grinding wheel after dressing should be compensated. The actual dressing test data shows that when the dressing amount is 0.03mm, the reduction of the grinding wheel is 0.0015mm, and the reduction of the dressing wheel is 0.0275mm.

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