When the inner diameter of the bearing is greater than 70 mm or greater cooperation interference, adopt the method of heating the bearing hole expansion, equipment to save time and effort, also in order to prevent due to excessive force application incur losses.


At that time, the demand of the heating measurement, the normal bearing heated to 80 ℃, 100 ℃. It is enough. More than 120 ℃ tempering can lead to bearing, so the Angle of the ring is higher and higher precision.


That require heating method is:


1, the heating method: electric heating plate


Will shelve bearing measuring how many seconds 100 ℃ of hot plate, the most trouble, such as how many times can make bearing thermal symmetry, and the size of the high frequency, the bearing can be used.


2, electric furnace heating method:


Open the bearings in the active heating furnace temperature control, heat balance, accurate temperature control, heat fast, suitable for a batch of bearing heating.


3, induction heating method:


Induction heater to heat the bearing application is fast and the temperature needed for stability and security, it is especially suitable for the inner ring of tight, just because the heated inner ring, and the external heat is small, it can drag on the shaft, a simple into the hole.


4, the light bulb heating method:


Application of 50 w bulb heating bearings, can ensure that the internal and external heating temperature is 100 ℃, a smaller bearing can indirectly the light bulb, larger bearing industry bulb shell, cooling fan cover, can prevent the bulb and heat equilibrium. The height of the fan casing can be adjusted. If the far infrared light bulb, pay attention to the position of the light bulb should be down, so the infrared radiation hurt people's eyes. Import pump energy saving light bulb. Bulb heating methods and practical small unit didn't break usually need; As bearing heating, can also be used as a common bulb light, so there is no any other infrastructure needs.


5, oil tank heating method SKF Bearings Inner Diameter http://www.cylindrical-roller-bearings.com/ :


This is a conservative way of heating, widely used in 50 ~ 70 mm tank away from the bottom of the net non-metallic, bearing on the Internet, a large bearing block. Bearing should not be placed in the bottom of the tank of indirect contact with the bottom bearing of the channel all the heat is too high, or channel at the bottom of the accumulation of dust into the bearing. More attention, the stand or fall of oil tank heating method should be used without corrosive hot mineral oil, transformer oil is best with good sex of the taiping heavenly kingdom, oil and equipment should be kept clean. Quantitative should match the size of the heating oil bearing and oil amount, if the ship is too small, in continuous operation, a bearing oil temperature will be landing, the result is bad.


Second, the method of sweet heating device:


(1) to measure improper heating control, high temperature bearing damage, by ring shrinkage temperature is low, no obvious effect. 80 ~ 1000 ℃ heating thermal contraction of the inner ring diameter, about the number of deposits is normal bearing interference.


(2) but the arrived in heat metering requires that equipment will stop as soon as possible, so as to avoid from the reduce the temperature of the device.


(3) the bearing device coupled to the inner ring on the shoulder pressure, pressure needs strong, fast and accurate operation.