Topic
Roller burnishing
About: Roller burnishing is a research topic. Over the lifetime, 395 publications have been published within this topic receiving 3322 citations.
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TL;DR: In this article, AA6063 cylindrical rods of 2 feet long and 25mm outer diameter are taken and a hardened steel roller is made as a tool and pressed against a rotating cylinrical work piece and parallel to the axis of the work.
7 citations
TL;DR: The same character of transformations during hardening by ball burnishing (roller burnishing) and during the running-in period of wear causes the increased wear resistance of ball-burnished surfaces during running in period and the approximately identical wear resistance during the steady wear period for surfaces both hardened and not hardened before wear as discussed by the authors.
Abstract: 1.
During surface hardening by ball burnishing and roller burnishing of gray cast iron microstructural transformations occur in the surface layer-the white phase occurs in treating pearlitic cast iron at low feed rates, the transformation of lamellar pearlite into divorced pearlite, the agglomeration of pearlite and partial transformation of ferrite into pearlite during treatment of pearlitic cast iron with increasing feed rates and during hardening of pearlitic-ferritic cast iron.
2.
Ferritic cast iron is hardened hardly at all but there is danger of re-cold working and “peeling” of the surface layer.
3.
The same character of transformations during hardening by ball burnishing (roller burnishing) and during the running-in period of wear causes the increased wear resistance of ball-burnished surfaces during the running-in period and the approximately identical wear resistance during the steady wear period for surfaces both hardened and not hardened before wear.
7 citations
TL;DR: A simulation concept for the prediction of forces in a robot-guided roller burnishing process based on a series of detailed ABAQUS simulations is presented and it is shown that, based on these test configurations, the process forces can be calculated much faster and with sufficient precision.
7 citations
TL;DR: In this article, a combination of URB and heat treatment (URB/HT) was used to achieve better surface finishing of Inconel 718 alloy, which had better surface morphology, lower surface roughness, higher micro-hardness, and more well-distributed compressive residual stress.
7 citations
TL;DR: In this article, a three-dimensional finite element analysis is carried out with the commercial software ABAQUS in order to model roller burnishng in the fillets of crankshafts.
Abstract: Roller burnishing is a very commonly used industrial process. It involves a local plastic deformation on surfaces that permits the fatigue strength of structures to be increased. Crack propagation is indeed delayed by the introduction of compressive residual stresses. In th~s way, this process is particularly useful in the presence of stress concentrators like in the fillets of crankshafts or in notched shafts for instance. In the present work, a three-dimensional finite element analysis is carried out with the commercial software ABAQUS in order to model roller burnishng in the fillets of crankshafts. The contact between the workpiece and the tool is simulated and the latter is subjected to a pressure. Thus, all the residual stresses and strains can be calculated after unloading. The outputs are compared to experimental profiles of residual stresses measured by X-ray diffraction and a good agreement between experimental and three-dimensional numerical results is obtained. Unfortunately, this analysis is costly and the effects of roller burnishing can only be observed in the vicinity of the contact between the tool and the piece and not on the whole circumference of the shaft since neither the tool nor the piece rotates. However, our investigations show also that a simple axisymrnetric model may approach experiments, not considering residual stresses as unknown quantities but as inputs of the problem. The threedimensional field obtained by revolving the two-dimensional one will then make it possible to study, by the finite element method, crack propagation in such residual stress fields.
7 citations