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Enabling More-accurate Measurement in the Micron Range

Enabling More-accurate Measurement in the Micron Range

Enabling More-accurate Measurement in the Micron Range

This technology has enabled myonic to do machining even more accurate than before, and achieve even more measuring points to be recorded in a shorter space of time. Article by Blum Novotest.

The range of precision bearings, which are still a key sales-driver at myonic, has since been enhanced by a number of other products.

Precision hard turning is a key production process in the machine tool bearings unit at myonic GmbH in Leutkirch im Allgäu/Germany. Pieces are directly turned to the final dimension with extremely tight tolerances in the micron range. Using a probe solution from Blum-Novotest, key workpiece dimensions are now measured in-process, while still clamped. The result: greater measuring accuracy, improved manufacturing process, shorter cycle times.

myonic’s machine tool bearing activities are concentrated at a fully air-conditioned facility in Leutkirch, Germany. “The high-precision roller bearings are employed, for example, in rotary and swivel tables, milling heads and swivel spindles in machine tools,” explains Christoph Sauter, who, as Production Manager, is responsible for the manufacture of these precision bearings. “The bearings are double-direction, screw-on and installation-ready precision bearing units and part of the AXRY bearing range at myonic.”

The axial-radial-bearings consist of three rings: inner ring, outer ring and axial washer. Additional components include the cylindrical rollers, axial and radial cages, lubricants and retaining screws that hold the assembled bearing together. The rings are made of chromium steel, which has proven highly successful in bearing rings and rolling elements and which is hard machined at myonic exclusively on turning centres.

The hard-turning process occurs on different machines in two stages: roughing and finishing. Depending on the actual size, fine finishing to the final dimension, with extremely tight tolerances in the micron range, takes place on a horizontal or vertical turning machine in one setup and without any reworking. Cutting is conducted in a wet condition (cooling lubricant), while the workpieces are clamped on special magnetic chucks. Important dimensions in Z-direction are measured in-process, in other words while still clamped on the machine. An innovation that has significantly contributed to improving the production processes. This high-precision task is performed by the TC52 touch probe from Blum-Novotest, which transmits the measured values to an infrared receiver inside the machine room. The TC52 is positioned on the Hembrug horizontal hard-turning machines via the tool turret.

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