The contact spot of the gear is a comprehensive reflection of the manufacturing error and the installation error of the gear. It refers to the contact of the assembled gear pair, which is distributed on the tooth surface after running under slight braking. The size of the contact marks is calculated as a percentage on the developed surface of the tooth surface. So far, most of the inspections of the contact spots have been observed on the inspection machine after a certain period of time. The national standards for gear accuracy are specified in light load. We have developed a detection instrument that can objectively assess contact spots, which is suitable for the detection of contact spots after the installation of the lower gear pair.
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