A laser irradiation apparatus includes: multiple irradiation units each to emit a laser beam to a surface of a base to form a pattern, the multiple irradiation units, including: a first irradiation unit to emit a first laser beam; and a second irradiation unit to emit a second laser beam; and a circuitry to: control the first irradiation unit to irradiate only a first irradiation region on a surface of a base with the first laser beam; and control the second irradiation unit to irradiate only a second irradiation region on the surface of the base with the second laser beam. The first irradiation region and the second irradiation region are not overlapping each other.

A method of assembling a first part (1) with a second part (2) having at least one crimping lip (4), a crimping anvil (3) and a crimping groove (9) designed to accept an edge (10) that is to be crimped belonging to the first part, in which method the edge that is to be crimped is introduced into the crimping groove and magnetic crimping is performed by applying to the crimping lip a magnetic field that is designed to bend the crimping lip over and close the crimping groove onto the edge that is to be crimped, characterized in that the crimping anvil has at least one inclined portion.

A zero-scrap method and associating tooling for manufacturing can bodies is provided. A metal sheet is shorn into strips, and each strip is wound to form a cylindrical tube. Each tube is cut into two or more can bodies using a zigzagged pattern, such that each can body has one planar edge and one zigzagged edge with triangular formations. Each can body is mounted on a mounting base for support while steps are performed to form the zigzagged edge into the can body base. A folding die folds the triangular formations until their apexes all coincide with one another and with the central axis of the can body. A flattening die then flattens the folded formation into a flat end of the can body. A friction stir welding assembly then stir welds the entire flat end of the can body at one time in order to seal all seams.

A method of removing a coating made of an organic material, in particular an organic lacquer or a polymer coating, which adheres to the surface of tin-plated sheet steel. In a first step, the tin layer of the tin-plated sheet steel is completely or incipiently melted by exposure to electromagnetic radiation with a predefined wavelength, to which the organic coating is at least primarily transparent, with the organic coating becoming detached from tin layer, and in a second step, the organic material of the coating which detached from the tin layer is removed.

The invention relates to a method for separating off an annular edge portion (2) from a cylindrical, thin-walled hollow article (1), in particular a deep-drawn, cup-shaped hollow article (1), the cylindrical hollow article (1) being turned about its cylinder axis (4) and a laser beam being directed onto the cutting point during the multiple turns until the edge portion (2) is detached from the rest of the hollow article.

A trimming device for metal hollow bodies, including a machine frame on which a workpiece round table is mounted for rotation about an axis of rotation and on which a cutting device is located, wherein the workpiece round table includes a plurality of holding devices designed for holding a metal hollow body each for carrying out a trimming operation, and wherein the cutting device is designed for providing a cutting beam, in particular a laser beam, for a contactless trimming operation on the metal hollow body, wherein a drive device is designed for providing a rotary step movement for the workpiece round table is assigned to the workpiece round table.