Rolling bearing - heating device method

Source: China Bearing Network Time: 2017-11-16

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When the inner diameter of the bearing is greater than 70mm; or the cooperation interference is large; the heating method is used to make the bearing hole swell; the device saves labor and time; and the damage caused by excessive force is also prevented. The bearings are usually heated to 80 Â° C; up to 100 Â° C. It is enough. Exceeding 120 Â°C will lead to the appearance of bearing tempering; the hardness of the ferrule is reduced and the accuracy is reduced. Commonly used heating methods are: hot plate heating method to place the bearing on a hot plate with a temperature of 100 Â° C for a few minutes. This method is the most succinct; if it is flipped a few times, the bearing can be heated evenly; and the power is also high; the large-capacity bearing can use this method.
2 Electric furnace heating method: The bearing is placed in the closed active temperature control electric furnace for heating; uniform heating; precise temperature control; fast heating; suitable for a batch of heating many bearings.
3 Induction heating uses induction heaters to heat the bearing to the required temperature quickly, securely and cleanly; this is uniquely suited for tight coupling of the inner ring; because only the inner ring is heated; the outer ring is rarely heated This can be easily mounted on the shaft; it is also easy to fit into the seat hole.
4 bulb heating method uses 50W bulb to heat the bearing; it can ensure the heating temperature is about 100 Â°C; the smaller bearing can be placed directly on the bulb; the larger bearing can be placed in the cone of the bulb; the cone can prevent the bulb heat Loss; and make the heating even. The cone cover can be adjusted up and down; in a certain scale, it can be used to heat the bearings of different sizes. If you choose a far-infrared bulb; pay attention to the direction of the bulb should be downward; avoid infrared rays is not good for human eyes This type of bulb can save energy. The bulb heating method is suitable for occasions where the number is small and not often needed to heat the bearing; the ordinary bulb can also be used for lighting; in addition, no other equipment is required.
5 Oil tank heating method This is a widely used traditional heating method; the oil tank is provided with a metal mesh at 50~70mm from the bottom; the bearing is placed on the net; the large bearing should be hung with a hook. The bearing should not be placed directly at the bottom of the groove; The bottom part of the bearing part is heated too high; or the dirt deposited at the bottom of the tank enters the bearing. The key points of the oil tank heating method are as follows; mineral oil with no corrosive thermal stability should be used; the best is transformer oil; oil and container are Should be kept clean. The capacity of the oil tank should be determined by the size of the heated bearing and the amount of oil; if it is too containerized, the è¯¹ é‡ é‡ ç° ç° ç° æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢ æ¹ƒèƒ«å²¢
The heating temperature of the key 1 heating temperature should be handled properly; if the temperature is too high, the bearing will be damaged; if the temperature is too low, the ferrule will be inflated in a large amount; the effect is not obvious. The inner diameter of the inner ring is obtained by the heating temperature of 80-1000 Â°C. A large amount of inflation; this is about bearings with normal interference; it is already enough.
2 arrive at the required heating temperature; it is necessary to carry out the device as soon as possible; avoid the cooling and the device is difficult.
3 The bearing is also shortened in the width direction when cooling; therefore, the device must apply a certain pressure to press the inner ring to the shoulder; and after cooling, test with a very thin feeler gauge; can the inner ring end face and the shaft There is a gap between the shoulders. Totally; the butterfly is skilled, agile and precise.

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