Reishauer Ag

Ralf Jankowski

Wolfgang Thyssen

Roland Schmid

Dieter Nobs

Michael Siebert

A grinding worm for the continuous generation grinding of a work piece is provided with mutually overlapping rough grinding and finish grinding zones arranged along the worm's axis, the finished grinding zone being provided with a three-dimensionally modified flank geometry having a width related design.

Grinding worm, profiling gear and process for the profiling of the grinding worm

Method and an apparatus for the profiling of single-gear or multiple-gear grinding worms for grinding tooth profiles in accordance with the principle of continuous diagonal generating grinding. A grinding worm is divided into at least two axial zones wherein one zone remains unmodified and a second zone receives, by means of special profiling methods, modifications of the thread flanks for the generation of tooth flank modifications The main attribute of these profiling methods is additional movements, which are superimposed on the disk-shaped profiling tool and/or the grinding worm in relation to a given profiling shift position, and which result in the modifications of the grinding worm flanks that are mapped onto the flanks of the toothed wheel work during subsequent diagonal generating grinding across a grinding worm zone profiled in this manner. Additional movements designed to generate the modifications include, in particular, pivoting of the profiling tool around an axis (F) or pivoting the grinding worm around an axis (C) during profile dressing, as well as continuous incline change during line-by-line profiling.

Profiling methods and apparatus for generation of modified grinding worms

Method and an apparatus for the profiling of single-gear or multiple-gear grinding worms for grinding tooth profiles in accordance with the principle of continuous diagonal hob grinding. A grinding worm is divided into at least two axial segments wherein one segment remains unmodified and a second segment receives, by means of special profiling methods, modifications of the spiral faces for the generation of tooth face modifications. The main attribute of these profiling methods is additional movements, which are superimposed on the disk-shaped profiling tool and/or the grinding worm in relation to a given profiling lift position, and which result in the modifications of the grinding worm faces that are mapped onto the faces of the toothed wheel work during subsequent diagonal hob grinding across a grinding worm segment profiled in this manner. Additional movements designed to generate the modifications include, in particular, pivoting of the profiling tool around an axis (F) or pivoting the grinding worm around an axis (C) during profile dressing, as well as continuous incline change during line-by-line profiling.

Profiling methods for generation of modified grinding worms

The invention relates to a method for the profiling of single-start or multistart grinding worms for profile grinding of gear-teeth according to the principle of continuous generating grinding. The goal of the proposed profiling principle is to position the profiling tool and/or the grinding worm in relation to each other in such a way that different areas of an axial section of the grinding worm thread (referred to as shape elements) can be profiled with different geometric elements of the active area of a profiling tool (referred to as tool elements). According to the invention, for this purpose, with the aid of a coordination matrix a tool element is coordinated with each shape element of an axial section of the grinding worm thread. The coordination criteria applied in this regard are, in particular, short profiling time and flexible changing of the shape elements. Tool elements that lead to a punctiform contact between the worm thread and the profiling tool are coordinated with shape elements of the worm thread axial section that must be flexibly changeable. On the other hand, longer shape elements are profiled by means of the more productive line contact. For the positioning of the grinding worm and the profiling tool in relation to each other, besides the linear axes known with respect to the profiling of grinding worms, for achieving the shifting and feeding movement, swivelling axes are also used for swivelling the profiling tool and/or the grinding worm.

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Bad Sackingen, Germany

Ralf Jankowski