품질 검사
국가 표준
1. 진동 가속도 국가 표준(일반적으로 Z 표준으로 알려짐)
본 규격은 베어링이 회전할 때의 진동가속도값을 측정하여 베어링의 품질수준을 판단하기 위하여 비교적 일찍 제정된 것으로, 품질등급을 Low부터 High까지 Z1, Z2, Z3의 3단계로 구분한다. 현재 국내 베어링 제조사들은 여전히 진동 가속도 값을 사용하여 베어링의 품질을 측정하고 있으며 이는 단순히 베어링의 피로 수명을 반영합니다.
2. 진동 속도 기준(통칭 V마크)
Since the original vibration acceleration standard has not been abolished, the standard was issued as a standard issued by the Ministry of Machinery Industry. It was formulated with reference to European standards and combined with my country's actual conditions and needs. It is used to detect the vibration speed of the bearing to classify the quality level of the bearing (equivalent to the national standard). Divided into five quality levels: V, V1, V2, V3, and V4. The quality grades of various ball bearings from low to high are V, V1, V2, V3, V4; the quality grades of roller bearings (cylindrical and cone) from low to high are V, V1, V2, and V3.
It reflects the quality of the bearing by detecting the vibration b speed of the bearing in different frequency ranges (low frequency, medium frequency, high frequency). It can be roughly analyzed whether the bearing has geometric size problems (such as steel ring ellipse), the quality of the raceway/rolling element, and the quality of the cage. Compared with the vibration acceleration, the quality of the bearing has been significantly improved. At present, domestic bearings exported to Europe, my country's military and aerospace industry have carried out bearing quality testing in accordance with this standard. At the same time, testing the quality of European imported bearings and distinguishing counterfeit imported bearings provides a feasible means.
Bearing quality testing has two parallel standards. Bearings with a high "Z-mark" quality level may not have good quality performance when tested with "V-mark", and there is no corresponding relationship between the two. This should be paid special attention to in the quality inspection of the bearing
