PERFORATED SECTION FOR WALL-PARTITION CARCASS AND METHOD OF ITS PRODUCTION Russian patent published in 2010 - IPC B21D47/02 B21D31/02 

FIELD: process engineering.

SUBSTANCE: invention relates to construction and metal forming, particularly to design of perforated section with thickness below 1 mm used is structural element of wall-partition carcass, and to method of its production. Preset-length strip is fed from uncoiler into rotary unit rollers to produce lines of cutouts at strip central part along lengthwise axis, said cutouts being made at an angle to lengthwise axis and opposite each other. Then said strip is transferred to profile-iron banding mill to draw said cutouts in crosswise direction by mill rollers to produce perforated preset-value design. First, stiffness rib is formed along the strip axis of symmetry to clamp said strip, as well as corrugated locks to allow feeding and clamping workpiece on mill rollers in crosswise drawing. All pairs of mill rollers have equal crosswise configuration, but with increasing diametre, and are made so that ledges on one roller and mating recess on the other one comply with shape of corrugation in workpiece and are arranged in symmetry about the axis. Note here that every subsequent pair stays apart from the axis of symmetry by value higher compared with the pervious pair. Said value equals the ratio between perforated surface drawing and the number of mill stands used in its production. Perforated surface produced, horizontal smoothing of said strip is effected by rolling aforesaid stiffness rib and corrugation. Then successive continuous metal deformation is performed till preset cross section profile is produced by bending the strip by pair of roller of profile-iron banding mill. Said profile has wall whereon rows of rhomb-like cells are arranged in symmetry about lengthwise axis and directed at an angle to the latter opposite each other.

EFFECT: expanded performances.

2 cl, 2 dwg