Contact and Non-contact Measurements of Grinding Pins

Abstract

Abstract. The paper presents the results of contact and non-contact measurements of external profiles of selected grinding pins. The measurements were conducted in order to choose the appropriate measuring technique in the case of the considered measurement task. In the case of contact measurements the coordinate measuring machine ACCURA II was applied. The used coordinate measuring machine was equipped with the contact scanning probe VAST XT and the Calypso inspection software. Contact coordinate measurements were performed by using of different measurement strategies. The applied strategies included different scanning velocities and distances between measured points. Non-contact measurements were conducted by means of the tool presetter produced by the Mahr company. On the basis of gained results the guidelines concerning measurements of grinding pins were formulated. The measurements of analyzed grinding pins performed by means of the non-contact measuring system are characterized by higher reproducibility than the contact measurements. The low reproducibility of contact measurements may be connected with the inaccuracy of the selected coordinate measuring machine and the measuring probe, the measurement parameters and environmental conditions in the laboratory where the coordinate measuring machine is located. Moreover, the paper presents the possible application of results of conducted investigations. The results of non-contact measurements can be used in the simulation studies of grinding processes. The simulations may reduce the costs of machining processes.

Research on measurement method of grinding wheel profile based on image mosaic

“…Through the movement of the X-direction translation stage and Z-direction vertical stage, the grinding wheel profile was moved into the FOV. Autofocus [13] of the grinding wheel profile was realized by moving the CCD camera along the optical axis (Y axis) and searching for the maximally sharp position in the image sequence. Then, through X direction and Z direction translation, different section images of the grinding wheel profile could be obtained.…”

“…Magdziak et al [13] employed a coordinate measuring machine to measure the profile of a grinding wheel and concluded that the contact method presented a lack of repeatability, which is associated with the different measurement parameters applied during coordinate measurements.…”