Nagel Maschinen- Und Werkzeugfabrik Gmbh

Nagel Maschinen Und Werekzeugfabrik Gmbh

Wolf Nagel

Uwe-Peter Weigmann

Peter Nagel

Herbert Rauscher

Rainer Widmann

Hans Kuhn

Karl Günther Roth

Uwe-Peter-Dr Weigmann

When honing working cylinders for reciprocating piston-type machines or engines, e.g. internal combustion engines, unlike in conventional honing methods working takes place with a much higher axial speed than circumferential speed. This gives a mark pattern, which admittedly differs significantly from the axial direction, but runs more in the axial direction than in the circumferential direction. On the dominant mark pattern can be superimposed in a finishing operation a honing mark pattern, which has much finer honing marks and creates a plateau surface with diamond-shaped islands pointing in the working direction of the piston. A thus treated working cylinder, in the case of limited wear, leads to much lower oil consumption on the part of the engines.

Cylinder and method for honing its internal surfaces

In place of conventional machining of cylinder paths or tracks of piston engines, a honing machining without a rotary component is performed at least as a final machining operation so that the remaining small honing tracks are directed longitudinally and consequently permit an improved running-in behavior in conjunction with the piston rings. A preferred honing tool this has honing segments taking up a large circumferential portion and which are preferably resiliently constructed in Such a way that they automatically adapt to the cylinder path. A coating of components in the vicinity or working chambers, such as internal combustion chambers, e.g. of piston rings, comprises a chemically inert, anti-adhesive metal, such as e.g. niobium or zirconium. It is applied in a target process in vacuo and has a small thickness of approximately 8 micrometers. Together with the final machining by honing in the axial direction and in conjunction with a corresponding cylinder path, there is an improved running-in behavior, lower pollutant formation, better sealing and oil scraping.

Method and tool for improving the structure of the inner faces of

A honing tool (1) simultaneously serving as a measuring mandrel has, apart from honing ledges (7), measuring and/or guide ledges (10), which are mounted in radially adjustable manner on the tool body (2) for increasing the measuring precision and/or for adjusting to different nominal dimensions of the hole. Thus, e.g. prior to the end of the machining of a hole, the measuring ledges (10) can be infed again and/or the desired measured value can be recalibrated by means of a calibration hole.

Honing measuring tool

A method for machining a workpiece bore in a single working stroke utilizes a honing tool with a preset honing surface fixed in a radial position corresponding to the desired end size of the bore during the work cycle and measures the finished project for calibration and repositioning of the work surface prior to the honing of a second bore during a second work cycle.

Method for honing workpieces

A method and device for honing a workpiece surface to be machined to provide a finished size and surface configuration comprising a honing tool with adjustable honing elements, the elements having a cutting zone and a calibrating zone, and also comprising a guide element with a surface sized to the finished size of the workpiece surface such that on the cutting stroke of the tool the cutting zone performs the cut and the tool is guided by the movement of the calibrated zone through the guide element and the honed surface.

Method and apparatus for honing workpieces

A honing tool for machining a workpiece bore (40) in one working stroke with honing coatings (22) set in fixed manner to the desired size of the bore, has on a non-readjustable part of the tool body (12) and preferably in the vicinity of a guide zone (28), air measuring nozzles (33). During the tool return stroke, these nozzles are subject to an action through the bore and measure the final size of the latter following the working zone (24). Optionally a readjustment can be automatically initiated as a function of the result.

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Nuertingen-Zizishausen, Germany

Wolf Nagel