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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26 Sep 2002TL;DR: In this article, a method and device for the production of coated bores is described, whereby the bore wall is plasma sprayed with a coating material after formation of the bore, and an adequate resistance of the coating to mechanical loads may be achieved by applying a roller burnishing.
Abstract: The invention relates to a method and device for the production of coated bores, whereby the bore wall is plasma sprayed with a coating material after formation of the bore. According to the invention, an adequate resistance of the coating of the bore wall to mechanical loads may be achieved, whereby the bore wall is subjected to a roller burnishing.
7 citations
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12 Nov 2008TL;DR: In this article, a roller burnishing apparatus including a first member moving relative to an object to be burnished, a second member movable relative to the first member in a relative movement direction, a burnishing roller held by the second member such that the burnish roller is rotatable, and a biasing device which biases with a bias of the second person relative to a first person in one of two opposite directions along the relative motion direction.
Abstract: There is disclosed a roller burnishing apparatus including a first member moved relative to an object to be burnished, a second member movable relative to the first member in a relative movement direction, a burnishing roller held by the second member such that the burnishing roller is rotatable, a biasing device which biases with a biasing force the second member relative to the first member in one of two opposite directions along the relative movement direction, and a pressing-force detecting device that detects a pressing force with which the burnishing roller is pressed against the object and which is based on the biasing force of the biasing device.
7 citations
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TL;DR: In this article, a physics-based model able to simulate the flow stress behavior of the Ti6Al4V alloy during subsequent severe plastic deformation processes, namely turning and burnishing, was presented.
Abstract: This paper presents a physics-based model able to simulate the flow stress behavior of the Ti6Al4V alloy during subsequent severe plastic deformation processes, namely turning and burnishing. All the physical and metallurgical mechanisms that accommodate the deformation were considered to describe the material strengthening and they were implemented via user subroutine in a commercial finite element software. Then, the proposed numerical model was used to investigate the effect of combined turning/burnishing processes on the surface integrity of manufactured Ti6Al4V components. Turning and roller burnishing experiments were conducted to validate the proposed finite element model and to analyze the microstructural phenomena and the output variables. The implemented model well fits experimental results, precisely predicting the evolution of grain size, dislocations, hardness, and residual stresses. Different process combinations can lead to similar microstructures and information on different contributions can be highlighted through physics-based modelling and simulated process combinations.
7 citations
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TL;DR: In this article, a comparative analysis involving three static burnishing processes: slide burnishing (SB), roller burnishing, and deep rolling (DR) is presented, and it is shown that three-quarters of the external work in SB converts into heat in the deforming element-workpiece contact area, which leads to the so-called softening effect in the surface layers.
Abstract: This article presents outcomes from a comparative analysis involving three static burnishing processes: slide burnishing (SB), roller burnishing (RB), and deep rolling (DR). The treated material was 41Cr4 steel. The investigative methods used were fully coupled thermal-stress finite element (FE) simulations and natural experiments. Using one and the same magnitudes for the governing factors, the basic difference among the compared processes was the type of contact between the deforming element and the surface being burnished—sliding friction for SB and rolling contact for RB and DR. SB was implemented with a spherical-ended polycrystalline diamond whereas RB and DR were conducted using a single toroidal roller with the same magnitude for the radius of the toroid surface as that for the radius of the deforming diamond. The objects of comparison were in themselves processes and considered to be alterations in the thermodynamic systems’ states, as were the obtained surface integrities (SIs) of the treated specimens and their fatigue behaviors. It was established that three-quarters of the external work in SB converts into heat in the “deforming element–workpiece” contact area, which leads to the so-called softening effect in the surface layers. The comparison of the energy balances of the investigated processes clearly demonstrates the thermo-mechanical nature of the SB process, whereas the deforming processes in the RB and DR can be assumed to be purely mechanical. On the other hand, SB provides less roughness, significantly greater micro-hardness, larger-in-absolute-values compressive residual stresses, a more refined microstructure and, as a result, greater fatigue strength compared with RB and DR.
7 citations
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TL;DR: In this paper, the impact of material properties (primary hardness) for smoothing efficiency and achieving of lower roughness and higher work piece hardness was evaluated with roller burnishing tools.
Abstract: Purpose: of this paper is investigation of fine machining efficiency of 34CrMo4 steel with roller burnishing tools. Application of roller burnishing process as a clean and environmentally friendly machining process which can replace other pollution processes is of great interests. It is important to evaluate the influence of material properties (primary hardness) for smoothing efficiency and achieving of lower roughness and higher work piece hardness. Design/methodology/approach: Experimental tests of cutting outputs have been done on specimens prepared for final machining process to estimate the rate of roughness decrease, and diameter increase. Roughness measured data before and after roller burnishing process have been compared. Findings: It was found that surface roughness is significantly lower after roller burnishing. Roughness ratio (before/after process) and decrease factor was 4 what doesn’t satisfy expected results. Some roughness results after burnishing exceed upper limits. Research limitations/implications: Results and findings presented in this paper are qualitative and might be slightly different in other machining condition (e.g. higher hardness materials and higher roughness of row material). Practical implications: Smoothing process can be performed on standard machine tools without additional reconfiguration tasks. Process is very rapid. Process is very versatile for any workshop and can be conducted without coolant what is additional advantages for the environment and pollution free machining. Originality/value: Originality of the paper is in analysis of results and smoothing efficiency with Wilcoxon test.
7 citations