When we drive for a long time, many auto parts need to be checked for cracks. If we don't find them in time during the car repair, they will be damaged and cause serious accidents. How to detect the crack of auto parts in Jinan BMW special repair?

　　部分裂紋的檢測方法包括磁力檢測、熒光檢測和氣溶膠檢測。對水冷缸體和缸蓋鑄件用液壓試驗方法進行了裂紋檢測。在某些軸類零件的表面也可以通過出油的方法發現隱藏的裂紋。

　　Some crack detection methods include magnetic detection, fluorescence detection and aerosol detection. The crack detection of water-cooled cylinder block and cylinder head casting by hydraulic test method was carried out. The hidden cracks can also be found on the surface of some shaft parts by the method of oil discharge.

　　磁力探傷。磁力探傷法具有設備簡單、測量準確、快速等優點。

　　Magnetic flaw detection. The magnetic flaw detection method has the advantages of simple equipment, accurate measurement, fast and so on.

　　磁探傷的原理是當磁力線通過被檢零件時，零件被磁化。如果零件表面有裂紋，裂紋部位的磁力線會因為裂紋本身不具有磁性而中斷，從而使磁力線偏移而形成磁極。此時，磁性鐵粉或鐵粉液體被移出零件表面，鐵粉被磁化吸附在裂紋內，從而顯示出裂紋的位置和大小。當裂紋方向與磁場方向平行時，裂紋所切割的磁力線數較少，裂紋兩側不會出現磁極，鐵粉無法被吸收。因此，利用磁力檢測裂紋時，裂紋必須與磁場方向垂直。因此，在檢測時，要估計出裂紋可能發生的位置和方向，并使用不同的磁化方法:橫向裂紋使零件縱向磁化，縱向裂紋使零件橫向磁化(或環形磁化)。

　　The principle of magnetic flaw detection is that when the magnetic line of force passes through the inspected part, the part is magnetized. If there is a crack on the surface of the part, the magnetic field line at the crack will be interrupted because the crack itself is not magnetic, so that the magnetic field line will shift and form a magnetic pole. At this time, the magnetic iron powder or liquid iron powder is removed from the surface of the part, and the iron powder is magnetized and adsorbed in the crack, thus showing the location and size of the crack. When the direction of the crack is parallel to the direction of the magnetic field, the number of magnetic lines cut by the crack is small, the magnetic poles will not appear on both sides of the crack, and the iron powder cannot be absorbed. Therefore, the crack must be perpendicular to the direction of magnetic field. Therefore, in the detection, it is necessary to estimate the possible location and direction of cracks, and use different magnetization methods: transverse cracks magnetize the parts longitudinally, and longitudinal cracks magnetize the parts transversely (or circularly).

　　以上就是濟南寶馬汽車專修介紹的檢測汽車零部件裂紋的相關方法，希望對您有所幫助!如果您有更多的信息，請隨時與我們聯系。

　　The above is the relevant method of detecting the crack of auto parts introduced by Jinan BMW special repair. I hope it can help you! If you have more information, please feel free to contact us.