Cylindrical expandable mandrels structure and working principle:
cylindrical expandable mandrels are consisted of mandrel main body, diameter adjustable body, cylindrical support plate, diameter expanding add. Layer , positioning and locking mechanism, connection flange etc. six parts.
The winding mandrel drive reducer screw gear by manual or motorized, screw gear drives left and right nuts to reciprocate linear motion. There are T grooves around nuts, nut reciprocating linear motion drives slope beams inside T-slot to expand and contract corresponding to center line of screw gear. Left and right ends of slope beams are symmetrical slope, its top surface assembles cylinder support plates, so the beams achieve diameter expansion and contraction with the reciprocating linear motion of nuts