Polygonturning - Newly developed technologies for polygon shapes, shaft polygons and gripper grooves

Polygon turning

AREAS OF APPLICATION AND USE

Polygon turning is an efficient turning process for the production of non-circular geometric shapes on shaft ends. The geometric shapes that can be produced are polygonal profiles that can be generated by kinematic coupling and the superimposition of linear movements between the workpiece and the tool. It is possible to produce profiles with axially constant profile and also with axially variable profile such as conical polygons.
The process makes it possible to produce shaft-hub connections (WNV) which, in addition to a frictional connection (interference fit), also have a form fit (polygon with n drivers) and thus, compared with
and thus offer increased transmission capability or higher safety compared to conventional WNV.

ADDED VALUE
Production of shaft-hub connections with
combined positive and non-positive locking possible.

Multi-edge hammering

Multi-edge hammering is characterized by the setting of a speed transmission ratio between the tool and the workpiece.Both rotate in such a way that counter-rotation is generated at the cutting edge engagement point. However, synchronization is also possible, in which other, sometimes more unfavorable cutting conditions are present. If the transmission ratio is selected appropriately, polygons with n corners can be generated. Other influencing variables are the tool radius and the minimum diameter to be produced (width across flats SW in the literature), which affect the size and shape of the polygon. The polygon hammering process is currently only used for the production of wrench flats and is not used for other applications. This results in new areas of application for the process, such as on convex polygons (polygonal hammering in up-cut) and notched (mating) gears
(polygonal impact in synchronism). By choosing a suitable gear ratio, it is possible to place several cutting edges on the tool, thus increasing productivity in terms of the tooth feed to be used. The tools designed for the process
tools are not available on the market, since the tools offered are used for the production of wrench flats and thus have an insufficient clearance angle reserve. The necessary tools are derived from the contour to be produced, which are ideally matched to the process and the material.