Showing papers on "Roller burnishing published in 1996"
Patent•
11 Jan 1996
TL;DR: In this article, a surface finishing tool for use in combination with a power driver for rotating a workpiece about a central axis including a microfinishing assembly adapted to be positioned adjacent the workpiece and having at least one finishing means for surface finishing the work piece, the finishing means lying in a plane generally perpendicular to the central axis of rotation.
Abstract: A surface finishing tool for use in combination with a power driver for rotating a workpiece about a central axis including a microfinishing assembly adapted to be positioned adjacent the workpiece and having at least one finishing means for surface finishing the workpiece, the finishing means lying in a plane generally perpendicular to the central axis of rotation of the workpiece and a burnishing assembly for applying a burnishing pressure to the workpiece, the burnishing assembly positioned adjacent the workpiece and spaced apart from the microfinishing assembly, the burnishing assembly having at least one burnishing roller lying in the plane generally perpendicular to the central axis of rotation of the workpiece wherein the microfinishing assembly and burnishing assembly are operable upon rotation of the workpiece to microfinish and burnish the workpiece respectively.
27 citations
Patent•
28 Mar 1996
TL;DR: In this paper, an annular body with a central opening is manufactured by powder pressing and sintering, and a roller burnishing tool is positioned within the central of the annular base.
Abstract: In a method for mounting and finishing a valve seat ring in an operational position of a receiving bore at the entrance of a gas channel of the cylinder head of an internal combustion engine consisting of a light alloy, an annular body with a central opening is manufactured by powder pressing and sintering. A roller burnishing tool is positioned within the central of the annular body. The annular body is inserted into the receiving bore with the aid of the roller burnishing tool such that the annular body is positioned with play relative the inner wall of the receiving bore. The annular body is radially expanded by roller burnishing with the roller burnishing tool such that the annular body positive-lockingly engages the inner wall of the receiving bore and is compressed to a selected finish size of ready-to-use density.
4 citations
TL;DR: In this paper, a slip-line field and corresponding ve- locity field are modified for the rolling of the rigid-plastic half-space given by Collins, which is responsible for a peeling and cracking of surface layers during the burnishing process.
Abstract: Micrographs of metal surface layers after the roller burnishing process show that while about 90% of surface 1ayer thickness is displaced forwards of a roller motion, a thin contact zone undergoes a backward displacement. This seizing effect is caused by a softening of the contact zone due to overheating of the material, during high speed rolling, or due to the plastic strain cumu- lation in the layer after multiple rolling repetition. The effect is responsible for a peeling and cracking of surface layers during the burnishing process. The plastic analysis of the process taking into account the above effect is presented in the paper. The proposed slip-line field and corresponding ve- locity field are modification of the simplified solution for the rolling of the rigid-plastic half-space given by Collins. PACS numbers: 68.10.Cr, 68.35.Gy