FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and can be used for producing the semitubular articles with periodic mount flanges from sheet blanks. First, long sheet blank is formed to W-like section with central site on height larger than the finished particle. Holes spaced apart over the blank length. Said blank is placed into female die and centered by premade holes. W-shape section is formed to U-like section with formation of flanges except nearby centering holes by rearrangement of along sheet blank.
EFFECT: lower costs, higher operating performances.
7 cl, 2 dwg
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