Roll structure of a four-high rolling mill for preparing ultra-thin metal foils with surface microtexture and a rolling method thereof

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.

What is claimed is: 
     
         1 . A roll structure of a four-high rolling mill for preparing ultra-thin metal foils surface microtexture, wherein, comprising: 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;
 wherein diameters of the upper supporting guide roll and the lower supporting guide roll are the same; diameters of the convex working roll and the concave working roll are the same; and   the upper supporting guide roll and the concave working roll being provided with grooves that match the convex working roll;   textured microtexture being provided on a groove surface of the concave working roll, and the textured microtexture are reinforced.   
     
     
         2 . The roll structure of the four-high rolling mill for preparing ultra-thin metal foils with surface microtexture according to  claim 1 , wherein the textured microtexture are transverse textured microtexture, longitudinal textured microtexture, or transverse and longitudinal textured microtexture; and a cross-sectional shape of the textured microtexture is sine waveform, triangle, trapezoid, or rectangle. 
     
     
         3 . The roll structure of the four-high rolling mill for preparing ultra-thin metal foils with surface microtexture according to  claim 1 , wherein, the textured microtexture of the groove surface are reinforced by carburizing or nitrogen treatment. 
     
     
         4 . The roll structure of the four-high rolling mill for preparing ultra-thin metal foils with surface microtexture according to  claim 2 , wherein, a depth of channels of the transverse textured microtexture is 10 to 50 μm, and a width between tops of adjacent transverse textured microtexture is 10 to 50 μm. 
     
     
         5 . A rolling method for preparing ultra-thin metal foils with surface textured microtexture, the rolling method is applied to a roll structure of a four-high rolling mill of  claim 1 , wherein, comprising steps of:
 S1, choosing a micro rolling mill equipped with a roll structure of a four-high rolling mill; and   S2, placing an ultra-thin metal foils to be rolled on the micro rolling mill with the roll structure of the four-high rolling mill, and starting a rolling process to form textured microtexture on a surface of the ultra-thin metal foils to be rolled;   S3, spraying anhydrous ethanol onto the surface with the textured microtexture;   S4, after the anhydrous ethanol is complete evaporation, performing a heat treatment, a straightening operation, an edge cutting operation, and a segmentation in sequence, to obtain an ultra-thin metal foils with the surface textured microtexture.   
     
     
         6 . The rolling method according to  claim 5 , wherein, a thickness of the ultra-thin metal foils is 20 to 100 μm. 
     
     
         7 . The rolling method according to  claim 5 , wherein, a material of the ultra-thin metal foils is one of copper, aluminum, copper alloy, aluminum alloy, magnesium alloy, stainless steel, and titanium metal. 
     
     
         8 . The rolling method according to  claim 5 , wherein, before S2, the rolling method also comprises the following steps:
 S21, performing a surface cleaning process on the ultra-thin metal foils to be rolled;   wherein the surface cleaning process comprises an anhydrous ethanol cleaning process and an ultrasonic cleaning process, and the anhydrous ethanol cleaning process is performed before the ultrasonic cleaning process.   
     
     
         9 . The rolling method according to  claim 5 , wherein, rolling conditions are as follows: a set value of a roll gap is 0 to 100 μm, and a rolling speed is 0.1 to 1 m min.