Abstract: A roll structure of a four-high rolling mill for preparing ultra-thin metal foils with surface microtexture and a rolling method thereof, the roll structure of the four-high rolling mill includes: an upper supporting guide roll, a convex working roll, a concave working roll, and a lower supporting guide roll arranged in sequence from top to bottom; diameters of the upper and lower supporting guide roll are the same; diameters of the convex and concave working roll are the same; and the upper supporting guide roll and the concave working roll is provided with grooves that match the convex working roll; a textured microtexture is provided on a groove surface, the roll structure of the four-high rolling mill prevents direct contact between the microtextured surface of the concave work roll grooves and the supporting guide rolls, directly addressing the issue of roll wear in traditional microtexture rolling processes.

Abstract: A method for checking the design of locking assemblies is provided. A pressure on each contact surface and a torque that can be transferred by a spindle and a bushing after locking assemblies are locked are calculated. The calculated torque is compared with the designed maximum transferable torque to calculate a torque safety coefficient. Based on a minimum fit clearance, a resultant stress of components is calculated and is compared with a yield strength of the material of the components to calculate a strength safety coefficient of the components. A pre-tightening force of the bolts is obtained according to a given pre-tightening moment of the bolts. A maximum equivalent stress of the bolts is calculated to obtain a safety coefficient of the bolts. This method is able to be applied to the manufacturing of the locking assemblies.

Abstract: The present invention discloses a method for checking the design of locking assemblies, comprising: calculating a pressure on each contact surface and a torque that can be transferred by a spindle and a bushing after locking assemblies are locked, and comparing the calculated torque with the designed maximum transferable torque to calculate a torque safety coefficient; with a minimum fit clearance, calculating a resultant stress of components, and comparing the resultant stress with a yield strength of the material of the components to calculate a strength safety coefficient of the components; and obtaining a pre-tightening force of the bolts according to a given pre-tightening moment of the bolts, calculating a maximum equivalent stress of the bolts, and obtaining a safety coefficient of the bolts. This method in the present invention can effectively verify the rationality of design of locking assemblies, reduce the manufacture risk and increase the yield of products.