Trunnion rigid with busbar processing technology

1. Processing points of the diameter of axle diameter of axle is generally cylindrical and the requirement of the surface roughness is higher, so the diameter of axle surface must pass fine grinding, grinding workpiece ( Trunnion) The direction of rotation should be consistent with the direction of rotation and the diameter of axle actual work. If the diameter of axle after fine grinding surface roughness also can not meet the requirements, needs for grinding or polishing processing. Trunnion materials should have sufficient hardness after heat treatment, for grinding and polishing. 2. Bearing hole processing point bearing shell material usually soft and inner cylinder should not be processed by grinding method, can use boring, king kong boring, scraping and grinding method processing. When grinding should not adopt the method of and trunnion running-in, and should use special, size and bearing hole size as pestle. Scraping for part of the bearing, with wide blade scraper machine. Manual scraping, scratches should be shallow. Inner surface shape complex bearing bush, according to the specific shape of the use of special boring method. ( 1) The requirement of bearing surface matching bearing installation position of the shaft and hole, the lower the surface roughness is, the better shape and position precision, would get the bearing rigidity is also higher. On the surface to surface strengthening treatment, favorable to improve rigidity. Using high hardness stopper of roughness is very low, at a certain interference in many gentle pressure lubrication condition in and out of a hole, but also to improve the bearing rigidity, snap ring if necessary to similar to the journal. ( 2) Bearing preload method is used to improve the bearing rigidity of ball bearings or tapered roller bearings can take axial preload method, radial on short cylindrical roller bearing can be preloaded method, can significantly improve the rigidity of shaft bearing or eliminated the bearing clearance, or had little negative clearance. But the speed is not too high, under the condition of temperature rise modestly, should also be transferred to the best little negative clearance status. When applying preload, should be constantly measuring the deformation situation, pay attention to in the low stage of the deformation, deformation is nonlinear with the increase of the pre-tightening load; And in the stage of high value, deformation are linear with the increase of the load. Once the deformation load appears linear relation, then stop immediately increase pre-tightening load, has been a constant stiffness can be obtained at this time. Since then, the axial and radial rigidity of bearing rigidity relationship exists between the fixed, and not dependent on the applied load.