Effect of a combined machining/burnishing tool on the roughness and mechanical properties

Abstract

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. ABSTRACTBurnishing is a cold working surface treatment process in which plastic deformation of surface irregularities occurs by exerting pressure through a very hard and a very smooth roller or ball on a surface to generate a uniform and work-hardened surface. This treatment occurs generally after the machining process. In this study, a new combined machining/burnishing tool is designed and is fabricated. This tool allows for generating simultaneously the machining (turning) and the burnishing of the cylindrical surface using a turning machine. First, turned surfaces at different conditions, sketches, finishing and half finishing were performed using only the cutting tool. The evolutions of a surface roughness parameter and the technological time relative to every test condition have been investigated. Second, using the combined machining/burnishing tool at coarse conditions, the evolutions of the surface roughness and the technological time have been also investigated. A comparison among the parameters obtained under different machining conditions and those obtained using the combined machining/burnishing tool has been carried out. Moreover, the analyses of the layers obtained on the combined machined/burnished surface have shown that the burnishing process induces compressive residual stresses on the subsurface treated specimens.

Modeling and Evaluation of Energy Efficiency of New Hybrid Turning-Burnishing Process in Terms of Surface Properties

“…Energies 2020, 13, x FOR PEER REVIEW 4 of 21 compared to using the calibrating spring in the works of References [19][20][21]. This effectively supports deep understanding of the impacts of the burnishing force.…”

“…The turned chips are prevented from being entangled/pressed by the compressing ball. The dominance of a new turning-burnishing tool is to allow to precisely control the burnishing pressure and force, as compared to using the calibrating spring in the works of References [19][20][21]. This effectively supports deep understanding of the impacts of the burnishing force.…”

Changes in the Surface Layer of Rolled Bearing Steel

“…Hydrostatic roller burnishing heads made by HEGENSCHEIDT or by ECOROLL [14] can be given as examples, in both cases, constant pressure of the roller burnishing element on the surface of the workpiece is ensured, along with a supply of process fluid to the point of contact. Convenient conditions were provided by speed values in the range of 20-100 m min −1 , feeds of 0.05 to 0.2 mm, and a working force derived from the fluid pressure of 500-2500 N [1,6].…”

“…The arithmetic mean roughness R a and also the maximum height of profile R z [6,8] were evaluated as shown in Fig. 6.…”

“…As part of the measurements, changes to the amount of residual austenite were evaluated, depending on the size of the working force. Subsequently, the amount of residual stress was also assessed in relation to the working force [6]. Both of these dependencies are shown in Figs.…”