Engine connecting rod bolt breaking reason
The broken bolts of the engine connecting rods can easily cause stenciling and burning of tiles. The main causes are: 1. The connecting rod journal and tile clearance are too large, and they collide with each other during the movement. The connecting rod bolts are broken by a relatively large force. 2 The internal bolts of the connecting rod have not been found and are still used. They are easily broken. If the connecting rod bolt is found to be buckled, buckled and lengthened, it should be replaced in time. 3. If the tightening torque of the connecting rod bolt is too large, the assembly stress exceeds the limit, or the tightening torque is too small, loosening during operation, and knocking, the connecting rod bolts are likely to be broken. 4 casually replaced with defective bolts, or connecting rod bolt material is not good, rough processing, can not withstand the standard torque and deformation or cracks, under the impact of the impact of stress concentration and break. 5. The locking device for the connecting rod bolts and nuts will lose its function. Loosening during operation will also cause the connecting rod bolts to break. 6. "Speeding" failed to take emergency measures in time to make the connecting rod bolts overloaded and broken. 7. The connecting rod bolts are not tightened according to the specified torque, forming a tight one, loose one and easily broken. In view of the above reasons, in order to prevent accidents, the technical standards and operating specifications must be strictly observed during assembly, check the tightening of the connecting rod bolts within the specified maintenance cycle, and find that the loosening is tightened with standard torque.
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