The so-called test run-in of the foaming machine means that the machinery, especially the newly purchased machinery, needs to be kept in good operation and well maintained in the new cycle, that is to make the mechanical operating parts (such as cylinder liner piston, valve rocker arm, timing gear... …) A good meshing state is achieved. In order to play a better performance in the future. The running-in period is an important period. If it is put into use without sufficient preparation, it will have a great impact on the service life of the equipment and the processing and production efficiency, and it is also a major hidden danger of mechanical failure.
Due to the influence of factors such as the processing, assembly and adjustment of parts of the newly purchased foaming machine, the friction surface is rough, the contact area of the mating surface is small, and the pressure state of the surface is uneven. During the operation of the machine, the concave and convex parts of the surface of the parts fit and rub each other, and the metal chips that fall off are used as abrasives to continue to participate in the friction, which accelerates the wear of the mating surface of the parts. Therefore, the parts (especially the mating surface) are easily worn during the running-in period, and the wear rate is fast. At this time, if overloading is performed, it may cause accelerated destruction of components and frequent early failures.
The gap between the new parts of the foaming machine is small, and due to installation problems, it is difficult to ensure the uniformity of the fit gap. It is difficult for the lubricant (grease) to form a uniform film on the friction surface to reduce wear. Thereby reducing the lubrication efficiency, causing early abnormal wear of the machine parts. In severe cases, it will cause scratches or seizures on the friction surface of the precision fit, leading to failures. In addition, equipment trial run-in is also a run-in between people and equipment. Because the staff (especially new operators) do not have enough understanding of the structure and performance of the machine, it is easy to cause malfunctions or even mechanical accidents due to operating errors.