CONTROL UNIT OF BIAS OFFSETTING AND OPERATION MODE OF BIAS OFFSETTING IN CONTINUOUS TACK WELDING DEVICE Russian patent published in 2017 - IPC B21C37/08 B23K37/04 

FIELD: measuring equipment.

SUBSTANCE: control unit has a metering device, that finds and sizes the joint displacement value in an across-track direction of the weldable open pipe section, and a bias offsetting control device, that adjusts the swaging forces of the cage rolls, that are mounted on the both sides of the weldable section in such a way that the joint displacement value grows smaller than a particular value in case if the offset value, measured by virtue of the metering device, is greater than or equal to the particular value. The bias offsetting control device also contracts swaging forces of other cage rolls in case if the joint displacement value does not grow smaller than a particular value after adjusting the swaging forces of the cage rolls, that are mounted on the both sides of the weldable section.

EFFECT: capability of the open pipe reducing by virtue of the great number of the cage rolls, the capability of the joint tie-in of the open pipe in an across-track direction of the steel plate of which this open pipe is made, and capability of the noted joint continuous tack welding.

4 cl, 7 dwg