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The installation of the ball screw vice supporting scheme

by:Waxing     2020-08-31
In order to improve the transmission stiffness, ball screw reasonable supporting structure and it is very important to the correct installation generally use high stiffness of thrust bearing support structure, in order to improve the axial bearing capacity of the ball screw. ( 一) Fixed - Freestyle end thrust bearing, its carrying capacity is small, low axial stiffness, applies only to short screw. The occasion of accuracy in low speed. ( b) Fixed - One end winding type thrust bearing, deep groove ball bearings at the other end. In order to reduce the influence of screw thermal alteration, the installation position of thrust bearing should be far away from the heat source is suitable for the occasion of rotational speed and high precision. ( c) Support - Bearing thrust bearing type at both ends. Will thrust bearings in the ends of the ball screw, and exert the pre-tightening force, help to improve the transmission stiffness. But this kind of installation method for thermal elongation is more sensitive. Suitable for medium speed precision occasions ( d) Fixed - Fixed at both ends with double thrust bearing and deep groove ball bearings. In order to improve the rigidity, using double bearing on both ends of the screw, such as thrust bearing and deep groove ball bearings, and exert the pre-tightening force. This kind of structure form, can make the thermal deformation of leadscrew can convert bearing preloaded force so far. Suitable for high speed and high precision.
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