Hot fitting process is a method of raising the temperature of the workpiece to around 180 degrees through open flame, oil boiling, and electromagnetic heating. Based on the planetary gearbox storage, the assembly base hole is heated and expanded, and the shaft type workpiece is hot fitted into the base hole. After the workpiece cools down, it is locked, thus achieving the assembly operation of fitting and gear type workpieces.

Due to the basic principle of hot assembly being thermal expansion and contraction, the diameter of the base hole is increased through thermal expansion by heating the workpiece with the base hole. However, insufficient heating time, small gap, low ambient temperature, fast cooling speed, and untimely assembly speed may cause the diameter of the shaft and hole parts to shrink before they are in place, resulting in a dilemma of clamping and jamming, which can cause damage to the parts.

The cold fitting process is an assembly method that first cools the parts that need to be installed into the base hole, causing their external dimensions to shrink. Planetary gearbox storage creates assembly gaps between the assembly surfaces to facilitate the assembly of the parts. When using the cold fitting process for assembly, only the secondary planetary gear ring needs to be cooled. The parts have a small volume, are easy to cool, and the cold fitting process is non-destructive assembly, which will not cause damage to the parts.

It is not difficult to compare the cold and hot installation processes of planetary gearbox storage. Compared with the hot installation process, the cold installation process is less likely to cause damage to the parts of planetary gearbox storage. Therefore, it is generally recommended that you use the cold installation process as much as possible when installing planetary gearbox storage.

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