Honing

About: Honing is a research topic. Over the lifetime, 3530 publications have been published within this topic receiving 17491 citations.

Hand tool for sharpening cutting edges

Abstract: A HAND TOOL FOR SHARPENING CUTTING EDGES CHARACTERIZED BY A CURVED HONING SURFACE FORMED BY A LAYER OF ABRASIVE PARTICLES FOR SHARPENING EDGES OF THE CUTTING DEVICE SUCH AS A KNIFE WHICH CURVED SURFACE ENABLES THE SHARPENING OF KNIFE BLADES HAVING A SERRATED OR WAVERLY CUTTING EDGE. IN THE PREFERRED EMBODIMENTS THE TOOL HAS AN ELONGATED SLOT OR GROOVE WITH SIDEWALLS COVERED BY THE LAYER OF ABRASIVE PARTICLES TO PROVIDE A POINT SHARPENING DEVICE. THE ELONGATED GROOVE OF THE TOOL CAN BE PROVIDED AS A GEOOVE IN A SOLID BODY MEMBER OF THE TOOL OR AS A SLOT IN A TUBULAR BODY MEMBER OF THE TOOL, THE GROOVE CAN ALSO BE DEFINED BY EDGES OF ASSEMBLED HALVES FORMING THE BODY MEMBER OF THE TOOL, OR BY THE CURVED SURFACES OF A PLURALITY OF BODY MEMBERS ASSEMBLED TO FORM THE TOOL.

Method and apparatus for honing

Abstract: A recess in a workpiece is honed by a honing tool that is reciprocated in a succession of strokes back and forth in the recess as it is rotated about an axis of the recess. The stones of the honing tool are pressed by at least one hydraulic cylinder against the workpiece with a pressure that is incrementally increased after each stroke. To this end a pilot-controlled primary pressure-limiting valve is connected between a pump and the cylinder, and a plurality of multiway valves can connect any of a plurality of differently preset secondary pressure-limiting valves to the pilot port of the primary valve. The cylinder piston can have a pair of unequal effective faces each exposed in a respective cylinder compartment so that during a first operation stage both compartments are pressurized to the same extent for differential action and during a second operation stage only one of the compartments is pressurized.

Study on the frictional performance of slide and plateau honed cylinder liners during running-in

Abstract: Purpose During running-in, the change in the honed cylinder liner surface alters the performance and efficiency of the piston ring-pack system. The present paper, thus, aims to investigate the surface topography and wear and friction evolution of a cylinder liner surface during the running-in tests on a reciprocating ring–liner tribometer under a mixed lubrication regime. After an initial period of rapid wear termed “running-in wear”, a relatively long-term steady-state surface topography can emerge. A numerical model is developed to predict the frictional performance of a piston ring-pack system at the initial and steady-state stages. Design/methodology/approach The liner surfaces are produced by slide honing (SH) and plateau honing (PH). The bearing area parameter (Rk family), commonly used in the automotive industry, is used to quantitatively characterize the surface topography change during the running-in process. A wear volume-sensitive surface roughness parameter, Rktot, is used to show the wear evolution. Findings The experimental results show that a slide-honed surface leads to reduced wear, and it reduces the costly running-in period compared to the plateau-honed surface. The simulation results show that running-in is a beneficial wear process that leads to a reduced friction mean effective pressure at the steady-state. Originality/value To simulate the mixed lubrication performance of a ring–liner system with non-Gaussian roughness, a one-dimensional homogenized mixed lubrication model was established. The real surface topography instead of its statistical properties is taken into account.