Penetration Depth of the Critical Temperature into the Workpiece Material During Grinding

The grinding process successfully ensures high accuracy of the part, microgeometry, and geometry, then very often grinding reduces such quality indicators as the phase-structure and stress composition of the processed surface. When grinding, high contact temperatures arise, some of which, called critical, have a negative effect on the part’s material and can lead to a change in the phase-structural composition and the stress state. The grinding process must be carried out so that these temperatures do not penetrate to a greater depth than the value of the remaining machining allowance. In this case, negative phase-structural changes occur in the layer of material that is removed. The article describes a technique that calculates the depth of penetration of critical temperatures and adjusts the processing modes so that each subsequent pass does not exceed the metal layer that will be removed.