Due to the influence of the new machine parts’ processing, assembly and adjustment, the friction surface of the concrete mixing plant is rough, the surface contact area is small and the pressure state in the surface is uneven. In the process of operation, the metal debris as abrasive continued to participate in the friction, which accelerated the wear of parts’ surface. Therefore, in the running-in period, it is easy to cause the wear and tear of the parts, and the speed of the wear is quick. At this time, if there is overload operation, it will lead to the failure of parts and the occurrence of early failure. Such as: the host’s mixing blade of the concrete mixing plant.

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