Aluminum strip material for capacitor shell and manufacturing method for aluminum strip material

Abstract

The invention relates to manufacturing of an aluminum alloy material, in particular to an aluminum strip material for a capacitor shell and a manufacturing method for the aluminum strip material. The material comprises the following alloy components in percentage by weight: 0.2 to 0.3 percent of Si, 0.45 to 0.55 percent of Fe, 0.08 to 0.12 percent of Cu, 0.01 percent of Mn, 0.03 percent of Zn, 0.03 percent of Ti and the balance of Al. By optimizing the proportion of the alloy components and matching a low sub-cooling casting and rolling technology, an optimized cold rolling process and two annealing processes, the produced aluminum strip material for the capacitor shell has high precision, low aeolotropy, low earring rate and high forming rate, and meets relatively high using requirements; and compared with the conventional aluminum strip material produced by using 1100 alloy and used for the capacitor shell, the aluminum strip material has the advantages that: an annealing process isreduced, the production efficiency is improved, the energy is saved, and exhaust of waste gas is reduced.

Description

technical field [0001] The invention relates to the manufacture of aluminum alloy materials, in particular to an aluminum strip material for capacitor shells and a manufacturing method thereof. Background technique [0002] At present, domestic ordinary capacitor shells are mainly stamped from Al99% pure aluminum plates, such as 1050, 1060 and other grades of aluminum strips, which have the characteristics of low price and good processing performance. However, with the development of capacitors in the direction of miniaturization, chip type and medium and high voltage large capacity capacitors. However, the surface of the conventional aluminum strip is blackened after punching, and the ear-making rate in the forming process is difficult to meet the punching process requirements, and the yield is also low. At present, 1100 alloy replaces 1060 alloy to produce capacitor shells, which improves product performance, but the traditional manufacturing method of 1100 alloy has the ...

AI Technical Summary

Problems solved by technology

However, the surface of conventional aluminum strips is blackened after punching, and the ear-making rate in the forming process is difficult to meet the punching process requirements, and the yield rate is also low.

At present, 1100 alloy replaces 1060 alloy to produce capacitor shells, which improves product performance, but the traditional manufacturing method of 1100 alloy has the defects of complicated manufacturing process and low manufacturing efficiency.