Study On Pre-Stripping Technology Of Copper Starting Sheet

At present,copper is used more and more widely in the production and life of mankind.The traditional level of electrolytic copper production has been unable to meet the growing market demand.In the early 20s of last century,foreign copper smelting enterprises began the research of automatic electrolytic copper production line,in recent years,the domestic smelting plant has also increased investment in the field.Among them,the copper starting sheet and electrolytic copper stripping is the key to the development of automated production lines,the stripping of copper starting sheet,including the pre-stripping and complete stripping process,pre-stripping is a pre-purpose of the completely stripped,and the aim is to open the joint of copper starting sheet and the mother board.If the pre-stripping fails,subsequent stripping can not be proceed smoothly.The traditional way of stripping is to scratch a crack and flare it from the interface end of combination interface bonded copper starting sheet and the mother board,then the workers use the manual way to strip the copper starting sheet completely from the mother board.But this kind of method is much harmful to the copper starting sheet and the mother board,which is prone to waste and low efficiency.Therefore,as the leader,the foreign smelters adopt flexible manner to achieve the copper pre-stripping,that is,making the interface end of combination interface,which combined with copper starting sheet and the mother board,crack the gap by loading a flexure force to the mother board which attached to the starting sheet,and then use the suction cup to absorb the copper on both sides of the copper starting sheet and strip them completely,to some extent,they have improved the stripping efficiency and reduced the rejection rate.However,this pre-stripping method exists several problems:firstly,there is a phenomenon that copper starting sheet is not separated from the mother board in the pre-stripping process.Secondly,the copper starting sheet bending deformation is relatively large;thirdly,the mother board over bending,which affecting the service life.Therefore,the study of copper pre-stripping technology is important and urgent.According to the characteristics of copper starting sheet separated firstly from the interface end,in this paper,the stress singularity of the interface end bonded the copper starting sheet and the titanium mother board was analyzed by using the interface mechanics theory,the reason that why separation emerges from combination interface end was researched,and the influence of different materials on the stress singularity in the interface end was studied.Then,the shear stress of interface which consists of copper starting sheet and the titanium mother board was analyzed by using the theory of material mechanics.Furthermore,the plate structure's flexural deformation under the bending force was simulated by using ANSYS Workbench software,and,the shear stress distribution of the interface between the copper starting sheet and the titanium mother board was researched.At last,according to the thickness of the titanium plate and flexural force,nine kinds of combinations were designed.The three-dimensional model was established for each combination,and simulated by using ANSYS Workbench software.By analyzing the interface shear stress and the plate structure deformation,determined the better combination that good for improving the quality and success rate of copper stripping with less damage to the titanium starting plate.The above study can be used for the improvement of the pre-stripping device of the copper starting sheet,the nickel starting sheet and the cathode plate.