Method and device for the cutting of pipes into separate pipe sections
AssigneeEmil Suter Maschinenfabrik AG
InventorsRudolf Binggeli, Fritz Langmeier
Life of this patent
Estimating the term…
Abstract
A method and apparatus for cutting pipes into sections are described. A punching unit (7) forms apertures (8) in strip (2) from which pipe (4) is formed on winding core (3). A cutting device (5) has a circular shears (10) which has a first, smaller-diameter cutting roller (13) and a second cutting roller (14) each having two cutting edges. The first cutting roller (13) is swivelled through aperture (8) into the pipe (4). Rotary movement of the pipe (4) effects cutting, during which the cutting rollers (13, 14) move in synchronism with the pipe (4) so that the pipe is cut from the inside and the outside by the cutting rollers (13, 14).
Claims20
A method for forming pipe sections from strip, comprising:
- (a) punching apertures at predetermined intervals in a strip;
- (b) winding said strip to form pipe having apertures on the outer surface of said pipe;
- and
- (c) cutting said pipe into pipe sections with a circular shears having a first cutting roller and a second cutting roller, the diameter of said first cutting roller being less than the diameter of said second cutting roller so that only the first cutting roller can fit through each said aperture, wherein said cutting includes repeating the following steps:
- (i) rotationally advancing the pipe, aligning the fist cutting roller with one said aperture int eh pipe and introducing the first cutting roller radially through the one said aperture and into the pipe, (ii) contacting the inside surface o the pipe with the first cutting roller and the outside surface of the pipe with he second cutting roller, (iii) rotating the pipe between the fist cutting roller and the second cutting roller until a pipe section is cut and separated from said pipe, and (iv) moving the first cutting roller outside of The pipe.
An apparatus for forming pipe sections from strip, comprising:
- (a) punching means for forming apertures at predetermined intervals in a strip;
- (b) winding means for winding the strip to form pipe having apertures on the outer surface of said pipe and for rotationally advancing the pipe;
- and
- (c) a circular shears for cutting the pipe into pipe sections, said circular shears including:
- (i) a first cutting roller and a second cutting roller, the diameter of said first cutting roller being less than the diameter of said second cutting roller so that only the first cutting roller can fit through each said aperture, and
- (ii) roller positioning means for introducing the first cutting roller radially through one said aperture and into the pipe, positioning the first cutting roller in contact with the inside of the pipe and second cutting roller in contact with the outside o the pipe, and moving the first cutting roller to a position outside of the pipe.
Dependencies are inferred from the claim text.