Critical refraction longitudinal wave detection component inside tangential stress assistant device

The utility model discloses an auxiliary device of internal tangential stress for critical refraction longitudinal wave detecting components, which is characterized in that: the inclined surface of the lower part (1) upward presents a concave cylindrical surface (3) and the inclined surface of the upper part (2) downward presents an outer convex cylindrical surface (4). The outer convex cylindrical surface (4) of the upper part (2) is meshed with the concave cylindrical surface (3) of the lower part (1). The upper part (2) can slide on the concave cylindrical surface (3) of the lower part (1). An indexing round graduation (6) is carved on borderline end face of the outer convex cylindrical surface (4) and the concave cylindrical surface (3). The receiving transducer and the transmitting transducer of ultrasonic wave are fixed at the upper part (2). The utility model has the advantages of overcoming the failures that different wedge structure is needed for measuring different components under test and the best