PIPE ROLLING MACHINE Russian patent published in 2019 - IPC B21B19/14 B21H1/18 

FIELD: technological processes.

SUBSTANCE: invention relates to metal forming, particularly, to inner roller rolling of thin-wall pipes with wall thinning. Machine comprises coaxially installed matrix with crimping and calibrating sections, rolling head with deforming rollers, fixed on rotating mandrel with possibility of diametrical adjustment of rollers position, with drive in form of spindle head with controlled rotation drive and longitudinal movement, pusher installed on hydraulic cylinder rod with adjustable speed of movement, which are arranged on bed with flat guides with possibility of their adjustment and fixation in axial and transverse directions. In the matrix there is lead section with diameter of 5–6 mm which is larger than outer nominal diameter of pipe, crimping section behind it is made in form of conical surface with angle of cone generatrix of not more than 10° and cylindrical with diameter less than outer nominal diameter of pipe by 1.0–1.5 mm, calibrating section after crimping has diameter equal to external nominal diameter of pipe. Pusher is made in the form of a disc, on end part of which at first there is a lead conical section, behind it cylindrical diameter equal to inner diameter of pipe, and end with pins in number of at least two with outer surface is less than outer diameter of pipe by 1.0–1.5 mm, wherein pusher is mounted on post supported by two rollers on flat guide plates, and post is attached to end of hydraulic cylinder rod.

EFFECT: higher reliability and convenience during maintenance and operation.

6 cl, 5 dwg