Original scientific paper

https://doi.org/10.21278/TOF.471046522

Numerical Evaluation of Plane Grinding Stability

Danijel Barjašić orcid.org/0009-0004-6520-006X ; HSTec d.d., Zadar, Croatia
Milenko Stegić ; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia
Marin Juran ; HSTec d.d., Zadar, Croatia

Abstract

Regenerative chatter is a serious productivity limitation in machining. The term refers to unstable relative vibrations between the workpiece and the cutting tool that negatively affect almost all cutting operations by chip removal. Grinding is the most commonly used abrasive process. As a result of significant tool wear in grinding, surface regeneration (which causes regenerative chatter) can occur on the workpiece and around the grinding wheel circumference. This study examines only the regenerative mechanism related to the grinding wheel, i.e., the effect of distributed grain dullness in particular, which causes instability in the machining processes. A chatter vibration model was formulated and validated by numerical simulations and experimental data. For the first time, the new model accurately predicts the existence of a region of stability in the grinding process. That new model refutes the previous model stating that grinding cannot be stable considering grinding wheel regeneration.

Keywords

machine tool dynamics; grinding chatter; wheel regeneration

Hrčak ID:

294212

URI

https://hrcak.srce.hr/294212

Publication date:

19.4.2023.

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