Abstract: The invention relates to a device (1) for production of a tube (2) with a polygonal, preferably rectangular cross-section, comprising a tube welding unit (3), in which the tube (2) is formed from a sheet metal strip and welded at the resulting jointing position and a rolling unit (4), connected to the tube welding unit (3) in the transport direction (R) of the tube (2), which essentially rolls the tube (2) into the desired polygonal cross-sectional contour. According to the invention, right-angled tubes may be produced with the optimal geometry, whereby a camber rolling unit (5) is arranged in series with the rolling unit (4) in the transport direction (R) of the tube (2), by means of which at least two opposing tube sides (6, 7) may be rolled with a pair of crowned convex rollers (8, 9).

Abstract: The invention relates to a device (1) for production of a tube (2) with a polygonal, preferably rectangular cross-section, comprising a tube welding unit (3), in which the tube (2) is formed from a sheet metal strip and welded at the resulting jointing position and a rolling unit (4), connected to the tube welding unit (3) in the transport direction (R) of the tube (2), which essentially rolls the tube (2) into the desired polygonal cross-sectional contour. According to the invention, right-angled tubes may be produced with the optimal geometry, whereby a camber rolling unit (5) is arranged in series with the rolling unit (4) in the transport direction (R) of the tube (2), by means of which at least two opposing tube sides (6, 7) may be rolled with a pair of crowned convex rollers (8, 9).

Abstract: Painting a band on elongated stock having an elongated edge by means of a spray gun placed at a particular distance from the stock which is controlled by a driven spindle mounting the gun. A scanning unit has a particular distance from the edge of the stock and scans an edge of a painted band, and a control circuit is connected to the scanning unit and operates the spindle drive for maintaining the spray gun on the spindle in a particular position relative to the edge of the stock.

Abstract: The h.f.-heated edges of a split tube are prepared prior to heating by means of contour-rolling the edges in order to obtain a convex contour in which the temperature is isothermically distributed, parallel to the convex edges.

Abstract: A tool for deburring the inside wall of welded tubes includes a tool body carrying a cutter, and a lower roller is linked to the body, being urged at a constant force against the tube wall; the body carries an upper roller linked to a rod that is accessible externally to a tube receiving the tool for urging the upper roller against the tube diametrically opposed to the lower roller. The pressure differential effective on the upper roller and the lower roller is measured for determining any drop in effective cutting forces, variation in cutting depth or the like.