TUBE BENDING DEVICE Russian patent published in 2013 - IPC B21D7/24 

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and may be used for metal tube bending in, for example, production of heat exchangers. Support roller is secured on axle at the bed to revolve thereon. Besides, axles are secured at the bed and check point is fixed thereat. Forming elements are composed of two thrusts with forming surfaces mating straight tube outer surfaces secured at said axle to run on two U-like clevises and secured to run on said axles of half-rollers. Every said half-roller has forming surface mating outer surface to tube being bend and prominent surface and centring thrust surface arranged opposite forming surface. Said check point is arranged to get in contact with centring thrust surfaces of half-rollers. Said half-rollers are arranged to get in contact with each other along contact prominent surfaces. Note here that half-rollers and thrusts are arranged to get in contact over forming surfaces with tube being bent. Note also that points of contact between semi-rollers and tube at bending start are located at the distance making 1/4 to 1 OD of tube being bent.

EFFECT: higher quality.

2 dwg