TY - JOUR

T1 - Influence of dressing strategy on tool wear and performance behavior in grinding of forming tools with toric grinding pins

AU - Denkena, Berend

AU - Krödel-Worbes, Alexander

AU - Keitel, Michael

AU - Wolters, Philipp

N1 - Funding Information: The authors gratefully acknowledge the German Research Foundation (DFG) for the founding of the subproject B8 “Grinding strategies for local and stress orientated subsurface modification of sheet-bulk metal forming tools” of the Transregional Collaborative Research Centre on sheet-bulk metal forming (TCRC73).

PY - 2022/8

Y1 - 2022/8

N2 - The performance of grinding tools in grinding processes and the resulting surface and subsurface properties depend on various factors. The condition of the grinding tool after dressing is one of these factors. However, the influence of the dressing process on the condition of the grinding tool depends on the selected process parameters and is difficult to predict. Therefore, this paper presents an approach to describe the influence of the dressing process on tool wear of toric grinding pins and the resulting subsurface modification. For this purpose, toric grinding pins with a vitrified bond were dressed with two different strategies and the wear and operational behavior were investigated when grinding AISI M3:2 tool steel with two different grinding strategies. In general, the investigations have shown that the dressing process influences the performance and wear behavior differently depending on the grinding strategy used. The degree of clogging is influenced by the geometric contact sizes. In the case of small engagement cross sections with simultaneously large contact lengths the thermal tool load is distributed over a small annular area of the tool and favors clogging. Crushing and additional transverse loading of the grains result in an almost clog-free tool surface. This also leads to a lower G-ratio. Crushing leads to an intensified decrease of the torus radii. The influence of the dressing strategy can also be observed in the induced residual stresses. Toric grinding pins dressed by crushing induce lower compressive residual stresses into the workpiece, which can be attributed to the self-sharpening effect. This effect reduces the mechanical and thermomechanical load of the workpiece during machining.

AB - The performance of grinding tools in grinding processes and the resulting surface and subsurface properties depend on various factors. The condition of the grinding tool after dressing is one of these factors. However, the influence of the dressing process on the condition of the grinding tool depends on the selected process parameters and is difficult to predict. Therefore, this paper presents an approach to describe the influence of the dressing process on tool wear of toric grinding pins and the resulting subsurface modification. For this purpose, toric grinding pins with a vitrified bond were dressed with two different strategies and the wear and operational behavior were investigated when grinding AISI M3:2 tool steel with two different grinding strategies. In general, the investigations have shown that the dressing process influences the performance and wear behavior differently depending on the grinding strategy used. The degree of clogging is influenced by the geometric contact sizes. In the case of small engagement cross sections with simultaneously large contact lengths the thermal tool load is distributed over a small annular area of the tool and favors clogging. Crushing and additional transverse loading of the grains result in an almost clog-free tool surface. This also leads to a lower G-ratio. Crushing leads to an intensified decrease of the torus radii. The influence of the dressing strategy can also be observed in the induced residual stresses. Toric grinding pins dressed by crushing induce lower compressive residual stresses into the workpiece, which can be attributed to the self-sharpening effect. This effect reduces the mechanical and thermomechanical load of the workpiece during machining.

KW - Dressing

KW - High-speed steel 1.3344 (AISI M3:2)

KW - Residual stresses

KW - Sheet-bulk metal forming

KW - Toric grinding pins

KW - Wear behavior

UR - http://www.scopus.com/inward/record.url?scp=85120479840&partnerID=8YFLogxK

U2 - 10.1007/s11740-021-01089-5

DO - 10.1007/s11740-021-01089-5

M3 - Article

AN - SCOPUS:85120479840

VL - 16

SP - 513

EP - 522

JO - Production Engineering

JF - Production Engineering

SN - 0944-6524

IS - 4

ER -