<p>The ELID (electrolytic in-process dressing) grinding plays an important role in the precision grinding since 1980s. When grinding of materials with ductility, the residual pile up will be stacked onto the groove and destroy the arc-groove profile. Few published literatures describe the influence of the residual pile up on the arc-groove profiles of bearing raceways. In this research, the micro-dent experiment with high-speed impact is carried out on the GCr15 bearing steel to analogy the interference situation between the individual cutting grain and the workpiece surface in the cutting stage. Of high interest is the fact that a smaller cutting depth produces a smaller residual pile up, but a larger cutting depth does not necessarily produce a larger residual pile up. It innovatively proposes plastic deformation coefficient <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="170_2025_15890_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="24" /> </InlineMediaObject> <EquationSource Format="TEX">${R}_{P}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>R</mi> <mi>P</mi> </msub> </math></EquationSource> </InlineEquation> and ELID oxide layer coefficient <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="170_2025_15890_Article_IEq2.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="25" /> </InlineMediaObject> <EquationSource Format="TEX">${R}_{E}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>R</mi> <mi>E</mi> </msub> </math></EquationSource> </InlineEquation>, which is capable of describing the evolution of the residual pile up on the arc-groove profile. As the penetration depth gradually increases, the height of the residual pile up stabilizes at around 0.07 mm, even the highest point of the residual pile up is not larger than 0.1 mm. This result indicate that the height of the residual pile up has the stable region, in which the impact of the residual pile up on the groove is controllable. The coefficient <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="170_2025_15890_Article_IEq2.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="25" /> </InlineMediaObject> <EquationSource Format="TEX">${R}_{E}$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>R</mi> <mi>E</mi> </msub> </math></EquationSource> </InlineEquation> also exhibits a stable area in which the geometric features of the ground surface are well kept without being disturbed by the ELID grinding process. Only when the thickness of the oxide layer is in a stable region and the height of the residual pile up is not larger than the upper limit of the plastic deformation in the cutting stage, the groove profile is controllable.</p>

The residual pile up in the ploughing and its influence on the arc-groove error in ELID groove grinding of bearing raceway

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发表日期：

2025年6月23日

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M.L. Wu,
C.Z. Ren,
K.F. Zhang

摘要

The ELID (electrolytic in-process dressing) grinding plays an important role in the precision grinding since 1980s. When grinding of materials with ductility, the residual pile up will be stacked onto the groove and destroy the arc-groove profile. Few published literatures describe the influence of the residual pile up on the arc-groove profiles of bearing raceways. In this research, the micro-dent experiment with high-speed impact is carried out on the GCr15 bearing steel to analogy the interference situation between the individual cutting grain and the workpiece surface in the cutting stage. Of high interest is the fact that a smaller cutting depth produces a smaller residual pile up, but a larger cutting depth does not necessarily produce a larger residual pile up. It innovatively proposes plastic deformation coefficient ${R}_{P}$ $R_{P}$ and ELID oxide layer coefficient ${R}_{E}$ $R_{E}$ , which is capable of describing the evolution of the residual pile up on the arc-groove profile. As the penetration depth gradually increases, the height of the residual pile up stabilizes at around 0.07 mm, even the highest point of the residual pile up is not larger than 0.1 mm. This result indicate that the height of the residual pile up has the stable region, in which the impact of the residual pile up on the groove is controllable. The coefficient ${R}_{E}$ $R_{E}$ also exhibits a stable area in which the geometric features of the ground surface are well kept without being disturbed by the ELID grinding process. Only when the thickness of the oxide layer is in a stable region and the height of the residual pile up is not larger than the upper limit of the plastic deformation in the cutting stage, the groove profile is controllable.