Transport Packaging Design Of High-precision Cylindrical Roller Bearings

High-precision bearings are widely used in aerospace and military aviation, its quality directly affects the performance of relevant machinery and equipment. Since the protective transport packaging high-precision bearings is insufficient, the rolling element and inner transport after arrival destination, the outer ring contact surface damage, the lead product Depot enable manufacturers to increase production costs.Existing high-precision bearings for the package to simulate road transport experiment, analyze the impact factors of surface quality in the transportation environment of high precision bearings under the existing package. After transit of high precision bearings subject to shock and vibration is present in the form of the analysis, fractal geometry to characterize morphology method of bonding surface by fractal theory has been roughened surface asperity distribution function, carry out the process of transport of high precision bearings subject to shock and vibration using surface friction and wear research.Strain clamp design principle of high precision bearings to eliminate the bearing clearance between the various parts, reduce the impact of the shock and vibration during transport to the bearing surface quality-based on stress. Based on the principle of give Fretting prevent rolling element bearings and the bearing inner ring and the clamping device relative sliding friction occurs, the use of stress-strain relationship has been applied to the rolling element bearing positive stress, the establishment of the clamping device according to the theoretical analysis three-dimensional solid model, provide the basis for subsequent simulation. Cushioning thickness calculated according to the mechanical properties of cushioning packaging materials, and transport and warehousing according to the process of environmental factors on the rust-proof material selection, selection according to flute corrugated cardboard packaging material is characterized by type and size calculation and stacking school nuclear.Based on finite element software to simulate the working process clamping device bearing interaction study the process withstand the mechanical axis expression changes and the clamping device. The high-precision bearings transport packaging assembly model into finite element software, the definition of material parameters and different parts of the mesh to give the clamping device and the bearing stress and strain through a cloud simulation.The cushioning pad, clamping devices, high-precision bearings and other components combined into a transport package, its vibration and drop tests to verify the theoretical analysis that is packaging design reliability. According to transport packaging test requirements, the sine of the package within 2～5Hz carried fixed frequency vibration test and a height of 700mm free drop test, through the analysis of acceleration and bearing contact surface roughness by the high-precision bearings, and with the original packaging test data verified by comparing the kind of transport packaging in the form of rationality.