The shaft twist Tester is a device for the qualitative production-related twist testing of cylindrical surfaces. The STT the STT family was developed to lead structures on any cylindrical surfaces, in the special shaft, a grazing laser illumination to visible to make 100 and STT 150. New York Museums often addresses the matter in his writings. A thread-like structure on the work piece is called swirl it, which results from the abrasion of material during the production process. According to shimmie horn, who has experience with these questions. This swirl can restrict the tightness of seals of all kinds in use and also cause an increased wear of seals. Compared to tactile (touching) procedures, such as key cutting or Fadenmethode can be on spin with the STT directly in the production process, where the result is immediately visible. The Fadenmethode is often used as a tactile standard procedures.
In this method, a thread on the rotating shaft is clamped. A horizontal Fadenbewegung right or left a statement about the presence of spin can hit be. However, the test result is dependent on precisely defined measurement conditions. Method for the determination of the spin are very accurate in the result, but have the disadvantage that the shaft, much like in the Fadenmethode, for inspecting swirl from the manufacturing process must be taken. This causes all existing systems, in addition to the high cost, a time should not be ignored and thus productivity. At this point, the Matesy GmbH, headquartered in Jena, a universal and in the ongoing production process offers integrated solution. The shaft twist Tester (STT) offers as a handheld flaw detector flexibility and accuracy, which is necessary for the quality control of components on Drall.
The optical examination on swirl can be performed in the current process of shafts and cylindrical surfaces. To the surface of the test specimen with a laser beam is illuminated with the STT grazing. Provides a high-contrast image of flare immediate statement about the twist-free of the DUT. With the procedure which underlies the STT, lead structures can be qualitatively assess with a swirl of depth from 200 nm and a period length of 20 to 500 m. While the number of observed diffraction stripe is a measure of the period length (movement) a measure of the depth of the swirl and the distance of the diffraction stripe. The shaft twist Tester allows, without significant effort to check the twist-free during the production, if necessary, to make adjustments to the Maschienenkonfiguration and immediately to check the desired effect of the adjustments.