Roller burnishing

About: Roller burnishing is a research topic. Over the lifetime, 395 publications have been published within this topic receiving 3322 citations.

Finite element approach for the prediction of residual stresses in aluminum work pieces produced by roller burnishing

Abstract: Burnishing is a cold rolling process without removal of metal. A set of precision rollers are used to roll on the component surface with adequate pressure. As a result all the premachined peaks gets compressed into valleys thus giving a mirror like surface finish. Surface finish is considered as important factor for the sliding surfaces, in order to have long life. In Burnishing, compressive residual stresses are induced during the process. In the present work, experimental work is carried out to reduce the surface roughness of a specially fabricated aluminum work piece, by roller burnishing process on lathe. High carbon, high chromium roller is used as tool in the roller burnishing process. Various experiments are conducted to investigate the variation of surface roughness (R a) with respect to the variation of burnishing force. Finite element model is developed to compare the experimental results. The results are found to coincide with the values got from the experimental readings, and the variations are less than 10 %.

Roller burnishing method and device thereof

Abstract: PURPOSE:To perform burnishing on the outer periphery or a work efficiently without leaving indentations by pressing the work rotated around an axis at the finish start position on oblique finishing rollers, starting the roller processing, and relatively moving it under the pressed state CONSTITUTION:When finishing rollers 18 are brought into contact with a work 14 being rotated by a work drive device, the first and second roller units 70, 71 are expanded against the energizing force of a pressing device 64 because the outer diameter of the work 14 is larger than the distance between both finishing rollers 18 when a stopper 65 hits it At the same time, the pressing between the work 14 and the finishing rollers 18 is started, the finishing rollers 18 and backup rollers 20 start to be rotated by the rotation of the work 14, a feeding device 22 slowly continues to feed a roller holding device 16, thus the pressing position between the work 14 and rollers 18 is moved in the axial direction Next, as the pressing position is moved, the roller processing is applied to the whole outer periphery of the large-diameter section of the work 14 to obtain the predetermined smooth surface

Apparatus and method for deburring and roller-burnishing machine parts

Abstract: The object of the invention is an apparatus and method for deburring and roller-burnishing machine parts. The inventive apparatus can be applied for working plane and general spatial surfaces by deburring and roller burnishing action and comprises a DC power supply (5) and a magnetic coil (3), and is characterised by having a revolving magnetic arbour (4) disposed inside a magnetic coil (3), with the magnetic arbour (4) adapted for being fitted on a milling machine, and also having roller balls (1) pressed against the surface of the workpiece (2) to be machined by the uniform magnetic field generated by the magnetic coil (3) and the magnetic arbour (4). A further apparatus according to the invention can be applied for deburring and roller burnishing plane and general spatial surfaces, and is characterised by that it can be fitted on a turning machine and that it comprises a permanent magnet (12) disposed inside a tubular extension piece (11) made of non-magnetisable material, a connecting piece (9) having bores for receiving fastening screws (10) securing the tubular extension piece (11), with the connecting piece being adapted for connecting the permanent magnet (12) and a rotatable arbour (8), and roller balls (1) pressed against the surface of the workpiece (2) to be machined by the magnetic force of the permanent magnet (12). The method according to the invention can be applied for deburring and roller-burnishing machine parts, and comprises the steps of producing adjustable-intensity uniform magnetic field for pressing hard, abrasion-proof rolling balls (1) against the surface to be machined and moving the workpiece (2) while simultaneously rolling the rolling balls (1) along the surface and the burred edges of the workpiece, flexibly tracking the surface irregularities thereof.

Experimental Investigation of the Influence of Burnishing Parameters on Surface Roughness and Hardness of Brass Alloy

Abstract: Burnishing is a cold working surface finishing process in which peaks and valleys on machined surfaces deformed plastically by the application of hard and finished ball or roller against to it. Recently burnishing is becoming popular among post finishing processes because of its many advantages along its primary role i.e., increasing surface finish. In this paper the effect of burnishing process parameters on surface roughness and hardness of brass alloy is experimentally investigated. A simple roller burnishing tool was used for the experiential work of the present study, surface test and micro hardness test were used to demonstrate the effects of the burnishing force and feed rate on surface roughness and surface hardness of a brass alloy. The smoothing process under consideration can be performed on standard machine tools without additional reconfiguration tasks. Process is very useful for any workshop and can be carried out without coolant. The results proved that all the parameters have significant effect on the above said two surface characteristics. The results revealed that improvements in the surface finish and increase in the surface hardness are obtained by reduce the burnishing feed and increase the burnishing force.