FIELD: mechanical engineering.
SUBSTANCE: expandable anchor bolt (1) and a method for its manufacture. Cap (2) is welded to the end of tube (3). Fold (9) is formed from the first side of anchor bolt (1) and runs along the length of tube (3). Lower part (10) of fold (9) is made in such a way that it passes from tube (3) into side wall (5) of cap (2) and outward to the mentioned first side to the position separated by protrusion (12) from first part (13) of the end wall that remains outside fold (9), while second part (14) of the end wall is drawn into fold (9).
EFFECT: increased resistance to stress arising on the curved sections of the material during expansion when in use.
12 cl, 4 dwg
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