FIELD: technological processes.
SUBSTANCE: initial blank is serially deformed in several stages by rolling tool of roll-forming machine with shaping of preset profile. At first shelf is bent on two sides of strip with width that is equal to half of top part of profile at the angle of 90°, in subsequent stages side walls are bent, then profile bottom is deformed upwards in the last but one stage. In the last stage it is straightened by extrusion with technological tool that is rigidly fixed in roll-forming machine.
EFFECT: higher quality of output produce and reduction of expenses.
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