TIMKEN bearing assembly noise cause analysis solutions

1, rolling bearing, the normal assembly, shaft and hole are generally interference fit. Interference fit assembly method, commonly used are: temperature difference method, the pressure in the method, etc. In fact, at the scene of the mechanical assembly, temperature difference method with less, mainly operating is more complex. A: temperature difference method of assembly, cooling than heating method is simple, generally we use liquid nitrogen, the advantage is temperature difference is big, the volume of linear expansion of clean. Such as bearing is installed into the hole, the TIMKEN bearing directly to the bubble in liquid nitrogen. Heating method more troublesome. In order to uniform heating, generally need to put the parts ( Bearing) In a liquid is boiled. If it is boiled bearing, demand is relatively high. For example, the heating medium to clean, good temperature to control, and so on. Temperature difference method, the biggest drawback is that the volume of parts limited. Lathe spindle assembly, for example, needs to be installed at the same time on the main shaft and the shaft gear parts, such as temperature difference method can not achieve. The most widely used b pressure into the method. A hammer and a copper bar. In detail, operation there are still some difference and matters needing attention. Bearing when loading, try to adopt the way of the impact. E. g. , in press. Hammer percussion, adverse to the parts and bearing are protected. Small specifications, if they cannot forgive surplus bearings, using hand press, such as screw type, you can, even vise. Large size bearing, generally want to use hydraulic. Bearing installation, in the beginning, always pay attention to whether the TIMKEN bearing tilt, need to adjust loading position, to prevent damage to the installation hole or shaft. , of course, the preparation before installation is also very important, such as surface mounting surface cleaning, remove the orifice, shaft end burr, etc. Clean up after the installation surface coated with clean engine oil, etc. The preparation must be careful. If because of the burrs, dirt and other research into the assembly surface, lead to bearing can't assembly in place, behind is more difficult, often in a dilemma, or even the entire shaft parts are scrap. Similarly, removing TIMKEN bearings, also should try to avoid impact. For example, can press press, can discharge device ( That thing that three legs) Try to use the device. Most of the time can only use on packing and unpacking bearing, the impact is inevitable. So the hammer kung fu, also be fitter's important basic training up to now. Different ways of loading and unloading, rap is different also. If is to use copper bar, left and right symmetry of percussion, every effort not to too much, will gradually bearing tap into it. In general, bilateral symmetry percussion, without three point hit. Another good approach is to use one with the bearing outer ring or similar cylinder pad on the bearing inner ring size, the end of the hammer knock drum ( Our own special tool, do the tapping of the head is dead) Under the bearing has been in a situation, All into the hole or shaft) , percussive force can be larger, actually this kind of situation, in principle should be used tap on a number of less as far as possible to bearing blow in place. Because the tap is according to the characteristics of the frequent tapping, produces the riveting effect, easy to hurt the surface of the shaft or hole. Just work independently, used to repair a clutch of slotting machine, remove the clutch shaft, unprepared, prophase tap on a right way, the strength is not enough, lead to have some deformation of the shaft end into the TIMKEN bearings. Later using the hammer of the 18 pounds, the shock of the whole machine tool like in sway, also didn't come down. After discharge or homemade a pull is done. This memory.