A method and a device are provided for joining the ends of strips with two or more surfaces arranged flat on top of each other, more particularly metal sheets that can be coiled, in order to draw these successively through a treatment or machining system. It is provided that the strip ends are joined by means of a plurality of eyelets arranged essentially transversally to the strip direction, wherein initially all holes are simultaneously punched in a first stroke and then all eyelets are pressed in a second stroke. The device has a clamping device and a machining unit, which has a working tool with a plurality of punching and pressing tools, wherein the working tool and a die are displaceable by the distance between two neighboring individual tools and wherein above the punching and pressing tools, a pressing device is provided.

A plant and a process for uncoiling wire rod from wire-rod coils produced in rolling mills. In particular, an apparatus provided with a control system that makes it possible to considerably reduce, if not completely eliminate, the risk of accidents for the operators, thus achieving a degree of safety that meets the most demanding standards. The plant includes the differential activation of devices that break down a safe area in order to guarantee a completely safe process of continuous uncoiling and manual operation.

A helically wound tubular structure formed from helically wound sheet metals is disclosed. The tubular structure has a first sheet metal helically wound about a longitudinal axis. A second sheet metal having voids disposed therein is helically wound about the longitudinal axis and coaxially about the first sheet metal. A third sheet metal is helically wound about the longitudinal axis and coaxially about the first sheet metal and the second sheet metal.

Cutting equipment for steel strips (1), the cutting equipment including: a cutting device (4) configured to laser cut a vicinity of a joint portion (2) in which a rear end of a preceding steel strip and a front end of a succeeding steel strip are joined that has been detected by a joint portion detection device (5), and a vicinity of a defective portion of the steel strips that has been detected by a defect detection device (8); and a control unit (9), wherein the control unit includes a plurality of modes, including a first cut mode that causes laser cutting in the vicinity of the joint portion, and a second cut mode that causes laser cutting in the vicinity of the defective portion, and the control unit operates the cutting device in accordance with one cut mode in the plurality of modes.