METHOD AND DEVICE FOR MANUFACTURING BANK CASES, AND BANKS CASE

摘要

To manufacture the can body (148, 248), a side wall (140, 24, 240) of the can closed using the first connection is prepared on the basis of a metallic flat material (103, 116). At least one locking element (142, 31a, 31b, 242) is located on the closed side wall (140, 24, 240) of the can with the help of another connection. At least one other connection is made in the form of a laser welded seam, which forms an annularly closed closing seam (145, 42, 245) between the closed side wall (140, 24, 240) of the can and at least one closing element (142, 31a, 31b, 242). Before welding of the closing seam (145, 42, 245), the seam contact surfaces of the side wall (140, 24, 240) of the can and the closing element (142, 31a, 31b, 242) fitted to each other are formed in the form of deviating from respectively narrowing in the direction of the axis of the banks, ring-shaped closed edge regions (140a, 60a, 142a, 240a, 242a). For welding of the closing seam (145, 42, 245), the side wall (140, 24, 240) of the can and at least one closing element (142, 31a, 31b, 242) are joined by edge areas (140a, 60a, 142a, 240a, 242a) until a mutual stop is reached, of which from the end surfaces (140b, 142b, 240b, 242b) of both marginal areas (140a, 60a, 142a, 240a, 242a), one is located inside on the case (148, 248) banks and the other outside. In this solution, backlash-free welding of the seam contact surfaces can be ensured so that even a very thin metal sheet is guaranteed a tight weld. The overlap of the material in the area of the closing seam (145, 42, 245) is minimal.