DEVICE FOR PIPE ROLLING AND EXPANSION Russian patent published in 2014 - IPC B21D41/02 

FIELD: metallurgy.

SUBSTANCE: device case has connection and working parts, central axial channel, working rolls, cylinder and rod with return spring. Cylinder and rod have conical sections to make the support for appropriate conical working section of aforesaid rolls while the latter are arranged parallel with the case axis, each roll being provided with conical shaping, cylindrical gaging and conical bearing sections. Note here that said rod is provided with polyconic stem while conical segments and wedges interacting with said segments and stem are located at the case working surface for radial displacement.

EFFECT: enhanced performances, accelerated process.

3 dwg