1 cutting disc pressure plate lock is not tight
Due to the poor installation operation, the feature of the burst is that the 6 inch es cutting disc has obvious wear marks at the contact point of the cutting disc. The cutting disc pressure plate is not tightly locked, and the relative rotation between the cutting disc and the cutting disc pressure plate causes frictional heat to cause the temperature at both ends of the cutting disc to rise rapidly, which is the cause of the explosion.
The thickness of the cutting disc is L1. Under the action of the screw, the step faces of the cutting disc pressing disc and the cutting disc holder are respectively in contact with the end faces of the cutting disc, and the locking surface is locked. At this time, the outer taper surface of the disc holder and the cutting disc are pressed. There is a gap S between the cones in the disc, and when S>0, it is ensured that the cutting disc is locked.
Detecting the cutting disc pressure plate and the cutting disc holder in the event of a burst failure: assembling the cutting disc pressure plate and the cutting disc holder without installing the cutting disc, screwing in the screw, and installing the cutting disc pressure plate in place. The gap value between the measured cutting disc pressure plate and the cutting disc holder is L=124.7 mm, and the thickness of the cutting disc whose actual failure occurs is L2=124.4 mm, L2
2 improper installation method
Due to the non-parallel between the working surface of the cutting disc and the working surface of the cutting disc holder, the locking torque of the fastening screw is uneven, etc., the force of the cutting disc is uneven, and the overturning moment is generated, which causes the cutting disc to tilt and the cutting disc The contact area with the cutting disc pressing plate and the cutting disc holder is reduced, and the relative rotation between the cutting disc pressing plate and the cutting disc holder is easy to occur during operation, thereby causing heat and explosion.
Long-term screw locking torque is uneven, which will result in uneven wear of the cutting disc pressure plate and the working surface of the cutting disc. In this case, even if a qualified cutting disc is used and the correct mounting method is used, a burst will occur.

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