Laser welding process for thin-wall tinplate packaging material

Abstract

The invention discloses a laser welding process for a thin-wall tinplate packaging material, which is used for realizing welding of a chrome plated tinplate and a tin plate tinplate which have the thicknesses of 0.20mm to 0.27mm by selection of parameters of a laser welding machine. Welding seam strips are of a fish scale shape and are uniformly distributed, are smooth and attractive and have no obvious welding defects of cracks, air holes and the like. The deformation of a metal tank and the damage to coatings on the inner and outer walls of the metal tank can be avoided. Welding seams are molten with a parent metal into one whole body. The laser welding process is reliable in welding, is beneficial to avoidance of damage to a metal packaging container and leakage of contents in the metal packaging container and reduction of loss of enterprises and consumers and can be used for effectively preventing spoilage of the contents and ensuring the body health of eaters. Due to a small light spot and high power density of the laser welding, the energy required by the laser welding is less than that required by the conventional welding by one order of magnitude, so that the daily operating cost of the laser welding is not higher than that of the conventional welding, the power consumption is reduced, the production cost is reduced, the problem of difficulty in welding of the thin wall of the chrome plated tinplate is also solved, the environment is not polluted, and the laser welding process has good social benefits.

Description

technical field [0001] The invention relates to a metal welding process, in particular to a thin-wall tinplate laser welding process. Background technique [0002] Metal packaging is an important part of my country's packaging industry, and its output value accounts for about 10% of my country's packaging industry. It is widely used in food, medicine, and industrial packaging. According to the survey, in the metal packaging, the coated tinplate packaging is the main one, and the main products are printed iron products, pop cans, aerosol cans, food cans, various bottle caps, and industrial chemical barrels and steel barrels. my country now has more than 500 tinplate three-piece can manufacturing production lines, and its products are supplied to the beverage industry with about 6 billion pieces, the food can industry with about 3.5 billion pieces, the annual production capacity of aerosol cans reaches 950 million pieces, and the annual production and processing volume of stee...

AI Technical Summary

Problems solved by technology

Foreign laser welding system suppliers may provide a specific set of process parameters. However, because the steel plate wall thickness, composition and coating metal used in cans will vary, most of the process parameters provided by system suppliers cannot be used.

In this way, the application of laser welding technology in the manufacture of metal packaging containers is greatly restricted.

Images