Study of the Influence of the Working Liquid Temperature in the Spindle Bearings of a Cylindrical Grinding Machine on the Errors of Its Position Relative to the Part Being Machined

Abstract

The article presents the results of measurements of the ambient temperature around the working cylindrical grinding machines during the working day. The analysis of the behavior of the grinding head spindle of different cylindrical grinding machines during the work shift is performed, namely the results of experimental studies of the displacement of the front and rear ends of the grinding head spindle of cylindrical grinding machines are presented. The analysis of influence of temperature of working fluids in spindle bearings on its displacement is carried out. Possible changes in the geometric shape, namely, conicity, of parts machined on cylindrical grinding machines have been established.

Investigation of Temperature Deformations of the Base of Cylindrical Grinding Machines

“…Errors due to the action of temperature deformations range from 30 to 70% in the total balance of processing errors, depending on the size of the machine [13]. The temperature deformation of grinding machine spindle plays an important role in the formation of the workpiece accuracy [14][15][16]. Previously, it was established [15,16] that the amount of thermal displacement of the spindle with a grinding headstock depends on the operating time of the machine tool, the temperature of the working fluid in the bearings, and the ambient temperature and can reach up to 40 µm.…”

“…The temperature deformation of grinding machine spindle plays an important role in the formation of the workpiece accuracy [14][15][16]. Previously, it was established [15,16] that the amount of thermal displacement of the spindle with a grinding headstock depends on the operating time of the machine tool, the temperature of the working fluid in the bearings, and the ambient temperature and can reach up to 40 µm. This contributes to the empirical power dependence of cutting modes' influence on part surface roughness obtained during grinding described in the work [17].…”