Method of manufacturing tube and apparatus for manufacturing the same
AssigneeDenso Corporation
InventorTakumi Yamauchi
Life of this patent
Estimating the term…
Abstract
In a method of manufacturing a tube that has a plurality of projections (dimples) protruding inwardly from an inside wall of the tube other than a longitudinal end, a work, which is a material of the tube and in a form of band plate, is shaped by a roller to form projections while the work is continuously fed. Then, the projections formed at a predetermined portion of the work are crushed so that the predetermined portion of the work is flattened. Therefore, the projections are formed continuously while the work is continuously fed. It is possible to deal with variations of length of the tube without exchanging a projection-forming roller, thereby improving productivity.
Claims17
A method of manufacturing tubes, each of which has a plurality of projections projecting inwardly from an inside wall of a portion of the tube other than a predetermined portion, the method comprising:
- a first step of pressing a work, which has a shape of band plate, to form projections on the work while the work is fed in its longitudinal direction;
- a second step of crushing a projection formed at a predetermined portion of the work to flatten the predetermined portion;
- and
- a third step of shaping the work into substantially a tube and cutting the work into a predetermined length.
An apparatus for manufacturing tubes, each of which has a plurality of projections projecting inwardly from an inside wall of a portion of the tube other than a predetermined portion, the apparatus comprising:
- a first shaping device that presses a work, which has a shape of band plate, to form projections on the work while the work is fed in its longitudinal direction;
- a second shaping device that crushes a projection formed at a predetermined portion of the work to flatten the predetermined portion;
- and
- a third shaping device that shapes the work into substantially a tube and cuts the work into a predetermined length, the third shaping device being provided forward of the second shaping device in a feed direction of the work.
A method of manufacturing tubes, each of which has a plurality of projections protruding inwardly from an inside wall of a predetermined portion of the tube, the method comprising:
- a first step of pressing a predetermined portion of a work, which has a shape of band plate, to form projections on the predetermined portion while the work is continuously fed in its longitudinal direction;
- and
- a second step of shaping the work into a tube and cutting the work into a predetermined length.
An apparatus for manufacturing tubes, each of which has a plurality of projections projecting inwardly from an inside wall of a predetermined portion of the tube, the apparatus comprising:
- a first shaping device that presses a predetermined portion of a work, which has a shape of band plate, to form projections on the predetermined portion while the work is continuously fed in its longitudinal direction;
- and
- a second shaping device that shapes the work into substantially a tube and cuts the work into a predetermined length, the second shaping device being provided forward of the first shaping device in a feed direction of the work.
Dependencies are inferred from the claim text.