Release date : 2022/3/15 11:25:54 　Clicks : 11410

First of all, bearing hot mounting usually refers to the process of placing the inner ring of the bearing on the bearing block of the rotating shaft for heating, which is divided into two kinds of hot mounting and cold mounting. Generally speaking, the former is more effective than the latter.
There are four heating methods of bearing hot mounting.
I. Oil bath 
Place the bearings on a grid in a container. Heat the oil in the container, fish it out after a predetermined period, wipe off the oil and adherents with a clean lint-free cloth, and place it on the shaft as soon as possible.
There are four noteworthy points in using the oil bath heat mounting method:
1. Normally, the bearing should be heated to 100°C only, with a maximum temperature of 120°C, and the oil must be clean.
2. The bearing should not directly touch the bottom of the oil tank, it is better to put the bearing on the metal net or lift the bearing.
3. Measure the inner ring of the bearing with calipers of the cut-to-length magnitude of interference, and stop heating when you can put it into the inner ring so that the inner ring will not become too cold to install.
4. After the installation, the bearing shall avoid the wind and be cooled naturally under cover to prevent the inner ring from shrinking too quickly and breaking, and its width direction will also shrink. Therefore, the shaft nut or other suitable method should be used to position it to prevent the gap between the inner ring and the shaft shoulder.
II. Industrial frequency eddy current heating 
After placing the bearing on the dynamic core of the industrial frequency heater, turn on the industrial frequency AC power. The bearing will generate eddy currents in the inner ring and outer ring due to electromagnetic induction, thus generating heat expansion.
III. Oven-heating 
Put the bearing into the special oven, the oven temperature should be constant and even. After reaching the set time, take it out and put it on the shaft as soon as possible.
IV. Induction heating
Heating the bearings on an induction oven is more suitable for miniature bearings, especially when there is no equipment mentioned above. It is a good method when replacing bearings at the user's site. The induction cooker used can be produced by a professional factory, and you can also use a common induction cooker used for home cooking. During operation, care should be taken to control the temperature.
Compared with the oil bath method, the induction heating method has the advantages of shorter heating time, uniform heating, can be timed, constant temperature, clean and pollution-free, high efficiency, and simple and quick operation.
A final point to note is that
The so-called hot assembly mounting is to heat the bearing to expand the inner diameter of the inner ring and then set it to the bearing block of the rotating shaft. After cooling, the inner ring shrinks to fit tightly with the shaft.
The temperature of heating the bearing should be controlled between 80-100°C. The heating time depends on the size of the bearing and is generally between 5-10 minutes.