By using the measuring features of Wenzel gear measuring machines combined with Barkhausen noise analyzer sensors and controls, gear surface defects like grind burn can now be detected.
In a continuing effort to enhance the capabilities of Wenzel gear measuring equipment, Wenzel has introduced a new feature that detects any presence of grind burn or pits on gears that are being measured on any Wenzel GearTec gear measurement machine.
The integration of this new grind burn detection capability was developed in association with Stresstech GmbH, a leading German producer of non-destructive process control equipment. The sensor technology being applied here utilizes the Magnetic Barkhausen Noise Method. This method is based on inductively detecting a noise-like signal generated when a magnetic field is applied to a ferromagnetic material. Barkhausen Noise can be used to analyze the micro-structure of a materials’ surface in terms of hardness and its microstructural condition.
Chris Pomm, Wenzel technical director explains, “Because gear measuring machines utilize very sophisticated programming software to inspect all geometrical features of gears and gear teeth, it’s logical that a sensor adapted to the same measuring arm, making many of the same inspection movements, should be able to inspect for grind burn and pits that can occur on the flanks of ground gear teeth. Typically chemical acid baths and optical methods are used to check for grind burn. With our new method, grind burn on gear flanks can be analyzed at the same time inspection occurs, eliminating the need for additional processing.”
