METHOD OF FORMING HOLES IN THE WALL OF THE FLEXIBLE PIPE AND DEVICE FOR ITS REALIZATION Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: forces are applied from the exterior side of the pipe perpendicular to its longitudinal axis. The pipe is given the flattened shape until it touches the opposite-laying walls. After flattening out the pipes are shifted to the location of the knife fixed perpendicular to the action of the flattening force. The hole is cut out in the process of the pipe travel cutting down by means of the knife edge the part of the flattened flexible pipe free from the applied forces. The device for the method realization has a housing with a slot and holes going out into the slot toward each other, a guide pipe placed in the housing slot and made as two cheeks of the guide pipe mounted from each other at the distance equal to the pipe diameter with windows, two knives, each of them is fixed on the housing with the possibility of its edge to go out into the windows of the guide pipe and the mechanism for the pipe flattening made as not less than one pair of spring-loaded rods mounted into the housing holes, correspondingly, and interacting with the exterior surface of the pipe. One of the rods has the drive of the reciprocal displacement. EFFECT: facilitated manufacture. 2 cl, 3 dwg