Adjust basic countermeasures of SKF error of linear motion bearings

Every procedure of the SKF bearing parts processing, in order to obtain linear motion bearing the size, shape and position precision of the machined surface, must adjust machine tool, fixture and tools, any adjustment will inevitably bring certain error. Bearing parts in mechanical processing of production and processing precision often require different, have different adjustment methods. Like, SKF bearing production in large quantities by using sample, sample, block and copying adjusting processing system; In sheet small batch production, usually by taking advantage of machine tool to adjust the scale or the use of gauge block. Adjust the work content has varied from the complexity of the workpiece, for simple surface, Such as internal and external) cylinder The location of the movement, generally only adjust the forming relationship; For complex surface, Such as helical surface, gradually open side) , to adjust the relations of forming movement speed. Therefore, adjust the error is caused by many factors. 1. Mechanical damage serious when in contact with the appearance of metal strip and a massive mixed and disorderly cut; In general, linear motion bearings mechanical damage refers to the alloy bearing appearance appear different levels of the trench. Contact surface damage and ablation phenomenon is the main cause of SKF bearing mechanical damage is difficult to form the oil film bearing appearance or oil film were severely damaged. 2. Plastic deformation in the surface layers of bearing outside the cavitation and cold work hardening, linear motion bearings in the cylinder pressure impact load) Under the action of repeated. Partial loss of the deformation ability, and gradually form lines and expanded, and then with the shedding of wear debris, the outside surface of the load the form. Pits of the cavitation, general bearing bush came first, then gradually expand the pits of the interface crack, and lead to an alloy layer along the interface crack parallel to the direction of extension, until it is peeling off. SKF bearing of the main causes of cavitation is due to structural elements such as oil groove and oil hole cross-sectional sudden change of oil flow caused by strong disturbance, oil flow disorder of empty space form bubbles, then because of the pressure, generate cavitation bubble breaking. Cavitation occurs commonly in high load zone of SKF bearing, such as the crankshaft main bearing on the lower bearing.