Roller burnishing

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

Burnishing of Engineering Materials: Process Optimisation (DOE) & Maps

Abstract: BURNISHING is a widely used common metal finishing technique, which is not only simple and economical, but at the same time is extremely important surface modification treatment that results in immensely desirable compressive residual stresses at the surface. The present monograph provides the scientific- and technological- principles based basis for burnishing, optimization of burnishing parameters (using Taguchi proposed and other designs of experiments), surface characterisation using optical microscopy and micro hardness measurements. The monograph also provides the details of burnishing maps, correlating burnishing parameters with surface characteristics-notable is the first time proposed MASTER BURNISHING MAP that correlates burnishing volume and strength / micro hardness levels. Thus, this monograph should be an extremely useful preference document for the mechanical engineers engaged in component and structural design and manufacture.

Multichennel roller burnishing machine for waxing fruit or vegetable

Abstract: The utility model discloses a multi-passage roller type burnishing machine for waxing fruit or vegetables. The utility model is especially designed for carrying out burnishing processing for fruit or vegetables after the fruit or vegetables are waxed for refreshment at present. The machine frame of the utility model is supported by an inclination angle regulating device and two hinged support seats and is slantwise arranged on a pedestal; the high and the lower end of the machine frame are respectively connected with the supporting seats and a gear box; every 4 to 6 brush rollers forms a plurality of U-shaped passages between the supporting seat and the gear box, wherein, the lower end of each U-shaped passage is connected with a discharge groove. The utility model can be used for surface burnishing for spherical or straight strip type waxed fruit or vegetables. Having the advantages of simple structure, high productive efficiency, uniform burnishing and little damage for fruit or vegetables, the utility model enhances the grade of the waxed fruit or vegetables.

The influence of milling-burnishing successive and simultaneous processes on the surface roughness

Abstract: The present techniques do not offer the possibility for milling and burnishing at the same time. The novelty of this study is the development of a new tool and tool holder that allows this processes to take place simultaneous. Magnesium alloys have a wide range of usages in industry; in the past years they seem to be a promising solution to classic implants. Improvements in fatigue and tensile strength need to be made. Heat treatments are difficult to implement, so the solution is a mechanical treatment. The burnishing process offers very good results, but it has difficulties in simultaneous machining with the milling process. Thereby a hydraulic roller burnishing tool and a special tool holder was manufactured to solve this issue. The combined process was carried out on a CNC milling machine. This study seeks to highlight the influence of the milling-burnishing process parameter on the surface roughness in the case of magnesium alloy AZ31B-F. Parameters like speed and feed of cut, burnishing pressure and depth where taken into consideration. It was noted that with the increase of the feed, speed, pressure and depth of burnishing the general percentage improvement of the surface roughness was higher.

Positron annihilation lifetime spectroscopy study of roller burnished magnesium alloy

Abstract: Abstract The effect of roller burnishing on Vickers’ hardness and positron lifetimes in the AZ91HP magnesium alloy was studied. The microhardness increases with an increase in the burnishing force and with a decrease in the feed. The comparison of various methods of analysis of positron annihilation lifetime (PAL) spectra allowed identification of two components, which are related to solute-vacancy complexes and vacancy clusters, respectively. It was found that the increase in microhardness was related to the increase in the concentration of vacancy clusters.

Roller burnishing tool and burnishing method using it

Abstract: PROBLEM TO BE SOLVED: To perform uniform and smooth surface finish over the total length of a hollow portion by axially tensing a mandrel with a plural of rollers arranged on the outer periphery in a rotatable manner and mounting the mandrel with a shaft connected to a motor for relative rotation with a workpiece. SOLUTION: In burnishing the inner wall 11 of the hollow portion of a workpiece 10, the axial position of a roller 2 relative to a mandrel 1 is selected, where time roller 2 is held, depending on the inner diameter of the hollow portion. A shaft 5 is connected to the end of the mandrel 1, part of the roller 2 being somewhat exposed to the outside is inserted in the hollow portion and the end is mounted on a motor. The workpiece 10 is fixed to a position, the motor is rotated and the shaft 5 is tensed. The mandrel 1 is rotated and the outer periphery of the mandrel 1 is planetarily moved. In this way, the rough surface of the inner wall 11 is deformed by rolling and plastic flow so as to be crushed for uniform and smooth surface finish.