| 摘要 |
The invention relates to a working method for roll-forming profiled bars (WPS) from flat strips in a roll train consisting of a series of roll stands with shaping rollers. According to said method, the flat strip is heated and the section material is rollingly displaced from the section of the web area to the section of the angle edge area by section rolling in order to form the roll-formed profiled bar (WPS). Heating is limited to the longitudinal centre region of the angularly roll-formed profiled bar (WPS) which is subsequently fed to a roller arrangement which consists of a horizontal roller (HW) and two driven roughing-down rollers (STW1 and STW2), whereby the axes thereof (x-x) extend in an inclined manner in relation to each other at an angle corresponding to the web angle of profiled bar (WPS), forming a camber at a distance above the horizontal roller (HW). The horizontal roller (HW) comprises a roughing-down inner calibre (SKR) which is adapted to the profile of the outer angle edge (AWK) of the roll-formed profiled bar and the roughing-down rollers (STW1, STW2) have roughing-down inner calibres (SKR) which are adapted to the outer profile of the web ends (STE) of the roll-formed profiled bar (WPS) . The section material is displaced by impinging the ends (STE) of the webs (ST) by means of the roughing-down rollers (STW1 and STW2).
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