KOYO bearing heating methods and key points for installation

When the KOYO bearing inside diameter greater than 70 mm, or the interference fit is larger, the heating method to KOYO bearing hole expansion, such easy installation to save time and avoid damage caused by the force is too large. It is enough. More than 120 ℃ tempering occur will lead to KOYO bearing, the lower hardness and precision of the ring. A, commonly used heating method has: 1, the heating method: electric heating plate to KOYO bearing placed in a temperature of 100 ℃ hot plate on a few minutes, this method is most convenient, such as reverse it a few times can make KOYO bearing heated evenly, and the efficiency is high, size KOYO bearing can use this method. 2, electric furnace heating method: KOYO bearing in the automatic temperature control of the closed electric furnace heating, uniform heating, accurate temperature control, heat fast, suitable for the occasion of a batch of heating a lot of KOYO bearing. 3, induction heating method: using the induction heater can be fast, reliable and clean to KOYO bearing heated to the required temperature, which are particularly suitable for the inner ring of the tight fit, just because of the heated inner ring, and the outer heat is small, so can be a drag on the shaft, also easily into a hole. 4, light bulb heating method: using the 50 w light bulb heating KOYO bearings, can guarantee the heating temperature about 100 ℃, the smaller KOYO bearing can be directly on the bulb, KOYO bearings may be placed on a larger bulb conical enclosure, conical cover can prevent heat losses, bulb and heated evenly. Conical cover can be adjusted up and down, in a certain heating range that can adapt to different size of KOYO bearing. If the far infrared light bulb, pay attention to the light bulb direction should be down, so as to avoid of infrared radiation is bad for the eyes. Imported pump this bulb can be energy saving. Bulb heating method is suitable for small and often do not need; To KOYO bearing heating, light bulbs still can make lighting at ordinary times, moreover does not need any other equipment. 5, oil tank heating method: this is a widely used traditional heating method, the bottom of the tank from 50 to 70 mm in a metal mesh, KOYO bearing on the Internet, KOYO bearings with a hook to lift. KOYO bearing should not be placed directly on the bottom of the channel, in case of contact with the bottom of the channel KOYO bearing parts of the local heat is too high, or dirt into KOYO bearing groove bottom sediment. Oil tank heating method of the key points are as follows, should use no corrosive thermal stability good mineral oil, it is best to transformer oil, oil, and the container should be kept clean. Tank capacity should be and the size of the heated KOYO bearing and oil amount, if the container is too small, in continuous operation, a into the KOYO bearing oil temperature will drop quickly, the effect is bad. Second, the main points of the heating installation method: (1) to control the heating temperature appropriate, KOYO bearing high temperature cause damage, the temperature is low enough ring expansion, the effect is not significant. 80 ~ 1000 ℃ heating temperature of the thermal expansion of the inner ring diameter, this with the general interference amount of KOYO bearing, is enough. (2) but to reach the required heating temperature, will be to install as soon as possible, so as to avoid cooling and installation difficulties. (3) KOYO bearing during cooling in the width direction also have shrinkage, therefore when installation to a certain pressure inner ring to the shoulder pressure, and with a very thin feeler after cooling test for detection, whether inside the gap between end face and shoulder. All in all, requires skilled, quick and accurate adjustment.