Roller burnishing

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

The effects of machining strategies of magnetic assisted roller burnishing on the resulted surface structure

Abstract: The aim of this paper is to investigate the effect of different burnishing strategy on a C45 steel machining. Burnishing is a well-known, cold working surface improving technology, it is usually applied for cylindrical workpiece. In the reported research a novel developed magnetic assisted ball burnishing (MABB) tool was applied which was designed for MABB machining of flat and harmonic surfaces. To increase its efficiency, different types of machining strategies were applied. After the burnishing process the machined surfaces were measured by surface roughness tester to determine the most important Rsk and Rku tribological parameters. According to the results it can be stated that all different burnishing strategies have special application areas where they can be used efficiently (e.g. sliding surface, moulding tool and after- or pre-machining for ultra-precision machining).

Effect of Roller Burnishing on the Mechanical Behavior and Surface Quality of O 1 Alloy Steel

Abstract: The main aim of this study is to enhance the mechanical properties and microhardness of the surface of O1 steel using the roller burnishing process. In manufacturing processes, surfaces and their properties are as important as the bulk properties of the materials. Surface treatment is an important aspect of all manufacturing processes. It has been used to impart certain physical and mechanical properties, such as appearance, corrosion, friction, wear and fatigue resistance. Widely used methods of finishing treatment that create necessary parts with the given roughness usually do not provide optimum quality of the surface. Therefore, methods of Surface Plastic Deformation (SPD) are used. One of the most effective representatives is the roller burnishing. This can simply achieved by pressing a hard and highly polished ball or roller against the surface of metallic work pieces. In this paper the effect of diamond pressing process with a different pressing force (105, 140, 175, 210) N was studied and the results of the experiments are presented. The major findings of this study are; the true stress of material has been increased of about 150 MPa, the surface quality has been enhanced by 12.5%, finally the U.T.S. has been increased by 166 MPa.

Combined tool for performing cutting and roller burnishing

Abstract: PROBLEM TO BE SOLVED: To provide a tool combining a cutting blade and burnishing roller to perform dimensional correction and roller burnishing surface finishing simultaneously in one process suitable for inside processing of a small diameter hole in particular. SOLUTION: The parallel arrangement of a cutter 14 and a roller 15 on the outer circumference of the main body enables the simultaneous processing. Also, the symmetrical arrangement of two of the cutters 14 and rollers 15 respectively offsets the cutting resistance and secures coaxial performance. The roller 15 is supported on a mandrel 17 possible to rotate freely. During processing, high-pressure working fluid is supplied to the roller from the working fluid supply routes 12a, 17b to smooth the rotation of the roller and to raise the roller burnishing pressure. Also, high-pressure working fluid is supplied to a chip pocket 16 from the behind to remove chips quickly.

Ultrasonic-Induced Phase Redistribution and Acoustic Hardening for Rotary Ultrasonic Roller Burnished Ti-6Al-4V

Abstract: Ultrasonic energy can promote the dislocation motion in ultrasonic-assisted machining. The phase redistribution of Ti-6Al-4V alloy will occur in ultrasonic-assisted machining with appropriate ultrasonic powers. The variations of the volume fractions of β-Ti and α-Ti influence the microhardness on the processed surface. In the present paper, various rotary ultrasonic roller burnishing experiments were conducted to investigate the ultrasonic-induced phase redistribution of Ti-6Al-4V at different ultrasonic powers. The volume fractions of β-Ti and α-Ti were measured by X-ray diffraction. SEM images of the processed surfaces were used to analyze the microstructure evolution and grain refinement of Ti-6Al-4V at various ultrasonic powers. Then, the distributions of local misorientation, texture and grain boundary were observed by EBSD. The results indicated that the microhardness approached the maximum value on the processed surface while the volume fraction of β-Ti reached its maximum value. Finally, the modified phenomenological model was applied to elucidate the relationship among the microhardness, the phase volume fractions and the grain refinement. The fitting degree for microhardness between the modified phenomenological model prediction and experimental measurement was 92.2 pct.

Process for using a combination tool

Abstract: A method of using combination tool is disclosed in which a roller burnishing tool and a cutting tool are both mounted on a common shaft means and in which the roller burnishing tool has its mandrel arranged so that its largest diameter portion is located toward the forward end of the tool in the direction of normal advance and protruding from the larger diameter end porton of the mandrel is a nose or male portion that is adapted to engage a receiving socket means in cutting tool assembly that is co-axially arranged with the roller burnishing tool and in which cutting is accomplished on the forward pass and burnishing on withdrawal from a bore.