Experimental Thermal Performance Double-Sided Face Grinding Machine

The paper presents a description of the experimental thermal characteristics of a double-sided face grinding machine. Thermal characteristics in the form of time dependences of temperatures and displacements were obtained when the machine was idling, as well as under load. The analysis of experimental studies showed that for a face grinding machine, the thermal characteristics differ significantly at idle and when operating under thermal load. First of all, this is due to different heating of the machine components during idling and when operating under thermal load. It was experimentally found that the highest temperatures during idling are at the faces of the spindle heads and the bed. When working under a thermal load, the greatest heating was recorded for structural elements of the bed located near the fence of the grinding zone, as well as for the faces of the spindle heads facing the grinding zone. The design features of the machine led to a significant difference in the magnitude of the thermal displacements of the right and left grinding wheels. The grinding wheels moved in the direction “wider at the bottom” under the influence of thermal deformations when the machine was idling. When working under heat load, the relative position of the grinding wheels gradually changed from “it is wider at the bottom” to “it is narrower at the bottom.” Changing the position of the grinding wheels led to distortions in the relative position of the grinded faces of the workpiece on the machine.