How to deal with the numerical control lathe guide bearing temperature is too high

HowNumerical control lathe guide bearing temperature is too high, cause tile burning phenomenon is a common problem, say how to deal with the following numerical control lathe bearing temperature too high.
1, The role of the guide bearing
Numerical control lathe spindle guide bearing is set to limit the generator can only be run within the scope of the provisions of the guide bearing clearance and bear radial load on the generator shaft.
2, The working principle of guide bearing
Thin oil lubrication block tile bearing the working principle of the main unit is the use of high speed rotates, the combination of lubricating oil into the bearing and shaft neck surface, for bearing lubrication, the lubrication of hot oil through the oil cooler after again into the combination of bearing and shaft neck surface, with the operation of the unit, has been automatic reciprocating cycle cooling lubricant.When the spindle rotation shaft neck and the tile surface to form stable oil wedge, thus bear radial load and is passed on to the guide bearing seat, then passed on to the frame.
3, The structure of the guide bearing
CNC lathe guide bearing for thin oil lubrication bearing block tile type, mainly composed of bearing cover, lubricating oil tank, cooler, return pipe, bearing, bearing, thermometer and carry heavy screw attached parts.B stand two units of guide bearing can be divided into eight pieces, according to the average distribution of the circumference of a circle in the generator main shaft guide shaft neck.
4, The bearing temperature and increase the vibration analysis of the reasons
According to the operation of the observation and maintenance situation analysis, we think that the cause of bearing temperature and vibration increase basically has the following two kinds:
(1) increases the bearing clearance, clearance is greater than the design requirement, cause lubricating oil after entering water guide bearing tile surface is not easy to form oil wedge, leading to poor lubrication are produced by the increase of temperature rise of guide bearing and the vibration phenomenon.
(2) bearing contact points on the surface of the tile, contact area is insufficient, can not meet the equipment specification requirements.
5, The temperature rise of guide bearing solutions
According to manufacturer design requirements, when CNC lathe units in continuous operation under the condition of the highest temperature of cooling water is not more than 25 ℃, temperature and oil temperature of the highest temperature should not exceed 65 ℃.Temperature and oil temperature of high and low, is not only related to the temperature of the cooling water, also with the cycle of lubricating oil and q clearance of bearing and spindle axis neck.
CNC lathe without the permission of the guide bearing clearance is 0.2 ~ 0.3 mm gap (bilateral), lower bearing shell immersed in lubricating oil, when the main shaft clockwise operation, lubricating oil is easy to enter the guide bearing tile surface, and produce oil wedge, lubrication was carried out on the tile surface, even after the spindle swing degree maximum point, although with q minimum gap, due to the short distance, good lubrication condition, less friction heat, cooling effect is good, does not generally lead to the phenomenon of bearing temperature, more will not lead to tile burning phenomenon.
Supplier
BMB Bearings ia a precision bearing enterprise specializing in the production of double row angular contact ball bearings, double row deep groove ball bearings, and single row angular contact ball bearings. The company is a end bearings manufacturer enterprise producing double row angular contact ball bearings in China. Its models cover 3200 series, 3300 series, 3000 series, 3800 series, 3900 series, etc. The product accuracy grades are: P0, P6, P5, P4, and the products are widely applicable.
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