Reishauer

Reishauer AG specializes in high-precision grinding technologies for gear manufacturing. Their product range includes high-quality gear grinding machines designed for a wide variety of applications, from small parts to large gears for heavy-duty vehicles. Reishauer employs innovative technologies such as generating grinding and profile grinding, offering complete solutions ranging from standalone machines to fully automated systems.

We are official distributors and representatives of Reishauer en España.

Dressing with diamond tools

The dressing of threaded grinding wheels for continuous generating grinding fulfils several purposes. It serves to generate the required grinding wheel profile and to maintain the free-cutting ability of the wheel. Furthermore, dressing also has to remove any impurities that have been generated during the grinding process. Additionally, dressing must create chip clearance space to transport away the chips that are produced during the grinding process.

Diamond is the ideal material for dressing tools as it is many times harder than the aluminium oxide of the grinding wheels. The dressing of Reishauer aluminium oxide wheels is exclusively done with rotary diamond dressing tools. Reishauer offers a comprehensive range of such rotary diamond dressing tools. The selection of the tools depends on specific customer requirements such as the desired flexibility regarding gear geometries and the required productivity.

Continuous generating grinding of gears

Only grinding can simultaneously deliver high surface finish and high precision geometry.
Grinding is a metal cutting process that, due to innumerable cutting edges and high operating speed, can simultaneously deliver high material removal rate, superior surface finish and very precise geometry. The grinding process is particularly suitable for hard materials such as case hardened gears. Generally, this process is referred to as hard finishing.

The Reishauer continuous generating grinding process is based on a multi-axes high performance grinding machine equipped with dressable, vitrified bonded grinding worms also called threaded wheels. This union of machine and tooling ensures the resulting high-quality gears ground with very short cycle times. The abrasive grain used in the threaded wheels consists of fused or sintered aluminium oxides that are markedly harder than the case hardened steel of the gears to be ground. The constant profile accuracy and permanent free-cutting properties of the threaded wheels are maintained by diamond dressing tools mounted within the grinding machine.

Put simply, the kinematics of continuous generating grinding can be understood as a worm drive with additional abrasive machining properties, consisting of an infeed X to set the depth of cut, a vertical feed-rate Z, and the lateral shifting motion Y that ensures that the abrasive worm shifts continuously sideways by a small amount for each mm of vertical feed-rate. In this manner, the grinding always takes place with fresh, unused abrasive grits that determine the material removal rates, surface finishes and profile holding.

Profile grinding

The profile grinding heads PSK extend the application possibilities of the Reishauer generating grinding machines. They enable the grinding of gears with very small modules and diameters that feature interfering contours.

Profile grinding is an efficient method for the production of prototypes and small lots. Gear profile modifications can be achieved by simply reprogramming the dressing path by using the existing profile grinding dressing tools.

Conversion to the profile grinding head is completed in as little as 20 minutes. On the software side, most Reishauer machines are already prepared for profile grinding. On the hardware side, a B-grinding spindle with «Performance» design is a prerequisite. Two variants of the profile grinding head are available: