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Número de publicaciónUS3595046 A
Tipo de publicaciónConcesión
Fecha de publicación27 Jul 1971
Fecha de presentación18 Dic 1967
Fecha de prioridad21 Dic 1966
Número de publicaciónUS 3595046 A, US 3595046A, US-A-3595046, US3595046 A, US3595046A
InventoresEino Kalervo Malkki, Valentin Silde
Cesionario originalMalkki Eino, Valentin Silde
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Method and device for manufacturing helically seamed tube
US 3595046 A
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Descripción  (El texto procesado por OCR puede contener errores)

United States Patent [72] inventors Eino Kale rvo Mnlkki 3,247,692 4/1966 Davis 72/49 Etel l'lesperiankatu 18 A; 2,136,942 11/1938 Freeze... 72/50 Valentin Silde, 3 linja23 B, both of 2,595,747 5/1952 Anderson 72/50 Helsinki, Finland 1,739,774 l2/l929 Thorsby 72/49 [211 App]. No. 691,642 3,192,754 7/1965 Kehne et a1 72/49 1221 1:2 FOREIGN PATENTS [45] Patented July 1 [32] Priority D. 2" 1966 4,513 2/1894 Great Britain................ 72/50 [33] Finland Primary Examiner-Richard .l Herbst l3 1 1 3404/66 Attorney-Richards & Geier [54] METHOD AND DEVICE FOR MANUFACTURING HELICALLY SEAMED TUBE 1 Claim, 6 Drawing Figs.

[52] Us. Cl 72/49 ABSTRACT: A helicany seamed tube is produced f a 1511 3"/12 strip-shaped profiled blank by turning the profiled blank by a [50] Field 0! Sql'dl 72/49, '50 revolving rolling device to the extent f one lead of the helical seam and bringing the profi1ed blanks which will form the [56] References Clad seam into seaming contact with each other. At least three UNITED STATES PATENTS rolling devices are in contact with the helical seam and finish 3,417,587 12/ 1968 Campbell 72/49 the seam while supporting the tube.

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SHEET 1 OF 3 Fig.3 INVENTORS:

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ATTOILNESLS PATENTED JUL27 1971 SHEET 2 OF 3 Fig.5

INV E NTO RSZ EJCMCLZKKLLA MSLZC/(f ATTDILNEEJS METHOD AND DEVICE FOR MANUFACTURING IIELICALLY SEAMED TUBE The present invention relates to a method and device for producing helically seamed tube from a strip-shaped profiled blank.

Nowadays several different methods are known for manufacturing helically seamed tubes from metal strip which prior to its introduction in the seaming device proper has been shaped to have such a suitable profile which enables the ultimate seam to be made and shaped. Of course, the preprofiling of the metal strip may then take place in the machine itself which performs the seaming, or it may be accomplished separately. The commonest shortcoming of previously known methods and devices has been that they usually include devices which one has been compelled to exchange when starting to produce a tube of different diameter or to use strip of another width.

The objects of the present invention include elimination of these drawbacks and achievement of such a method and device that one and the same machine can be used without exchangeable tools, merely by performing certain adjustments, to manufacture tubes of even considerably different diameters and even to manufacture conical tube sections by means of which tubes of different diameters may be connected to each other.

One of the present inventions most essential advantages is the simplicity of the devices required in it, and the fact that one is enabled to change the production of the seaming machine very rapidly from one type of tube to another, all of which results in considerable reduction of the production costs.

The invention is described in greater detail in the following, with reference to the attached drawing and to the different embodiments of the invention illustrated by it, partly in the way of sketches.

FIG. I shows a device for use according to the invention, seen from one side. i

FIG. 2 shows the same device, seen from above.

FIG. 3 shows, in the form of profile diagrams, the different phases of forming the helical seam.

FIG. 4 shows some other profile shapes of the helical seam which can be produced by means of the invention.

FIG. 5 is an enlarged presentation of part of FIG. 1.

FIG. 6 shows, from the side as in FIG. 1, another embodiment of the device used according to the invention.

The metal strip 1 enters the machine, drawn by the rolls 3. At the same time the rolls 3 shape the strip blank 1 to have the desired profile so that a profiled strip 2 is produced, which is fed onwards in the device. The strip 2 then passes through an arc of 360, forming a length of the tube corresponding to one lead of the helical or screw line formed by the helical seam, and arrives at the rolling device 4, which initiates the finishing of the helical seam. On the length of the next lead of the screw line, starting at the rolling device 4, two further rolling devices 5 and 6 have been placed, which finish the helical seam. It is favorable in view of the seaming work quality as well as the reliable operation of the entire device if all the rolls participating in the seaming operation are driven, that is if they draw the tube which is being formed in the direction of the helical seam with the same speed. If preprofiled strip is used in the device, the rolls 3 are obviously unnecessary and may be replaced with some appropriate preprofiled strip feeding device, in which case the feed has to be synchronized with the traction of the rolls producing the helical seam.

If the width of the strip 2 is changed but the outer diameter of the tube 9 to be produced remains unchanged, the mutual position of the rolling devices is adjusted in the longitudinal direction of the tube which is being formed, as required. If it is desired to change the outer diameter of the tube produced by the device, the rolling devices 5 and 6 are displaced in their guides 8. In the embodiment accordin to FIG. 1, oblong openings in the end plate 7 act as guides In the embodiment shown in FIG. 6 the rolling devices 5 and 6 have been mounted on slides 10, both slides moving along two guide bars, and by turning the spindle 12, which acts on screw spindles 11 interacting with the slides 10, the slides 10 and the rolling devices 5 and 6 along with them may be positioned as desired. The spindle 12 (FIG. 6) may also be arranged, e.g. by means of the appropriate gear ratio and transmission, to per form a reciprocal rotation so that one may then with the device produce a helically seamed tube the diameter of which alternately decreases and'increases. In order that the rolling devices according to FIG. 6 might be made to be driven rolls and to exercise traction, the power is most suitably transferred to the slides by means of chain transmission and further carried by bevel gears to the. rolling devices proper (5 and 6), which in the embodiment according to FIG. 6 both include two rolls rotating in opposite directions and pressing the helical seam between them.

In FIG. 3 the three different phases a, b and c occurring in the manufacturing of one type of helical seam are shown. These profile shapes of the seam are produced in the device at the pints indicated by the same reference symbols in FIG. 3. In FIG. 4 some other such helical seam profiles are presented which can be produced with a device and method according to the'invention.

A device according to the invention can naturally be provided with more than three rolling devices, but there is no reason for this as a rule. The device would merely become unnecessarily complicated, and achievement of certain adjustments would be rendered more difficult. It is also possible to install in the device various supporting and bracing elements, such as rolls, especially when manufacturing of large-diameter tubes is concerned, but such rolls are obviously in no wise connected with the producing of the helical seam itself, that is, they do not actually fall within the sphere of the invention.

It is possible at the same time, e.g. when tubes consisting of very thin material are seamed, to place within the tube at the points where seaming is in process, a bracing roll or some equivalent organ, against which theseaming is done.

With a prototype of the device according to the invention, in which three rolling devices have been used distributed over the length of one lead of the helical seam produced, with mutual phase shift, tubes have been seamed with diameters varying from the order of 1 cm. up to 1.5 meters. It is easy in actual practice to achieve even larger diameters if need exists.

In the foregoing the invention has been described in the first place with reference to the embodiments shown in the drawing. However, the invention is not restricted to them and it may vary within the scope defined by the attached claims.

We claim:

1. A device devoid of mandrel for making rigid helically seamed tubing, said device comprising a device for profiling and feeding a metal strip, at least three rolling devices, means rotating one of said rolling devices in synchronism with the speed of said feeding device, said one rolling device engaging and turning the metal strip to the extent of 360 and bringing its edges into seaming contact with each other, the other two rolling devices being spaced from the first-mentioned rolling device to the extent of a pitch of the helical seam and engaging the rolled strip to join its helically extending seams, two guides extending at an acute angle to each other and carrying said two other rolling devices which are movable upon said guides and screw spindles carried by said guides and engaging said two other rolling devices and geared to a common shaft for simultaneously varying their distances from the first-mentioned rolling device while the device is in operation.

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US1739774 *7 Nov 192717 Dic 1929California Corrugated CulvertSpiral-pipe machine
US2136942 *23 Oct 193415 Nov 1938American Rolling Mill CoMethod and apparatus for making helical lock seam culverts
US2595747 *16 May 19476 May 1952Chicago Metal Hose CorpTubemaking machine
US3192754 *10 Jul 19616 Jul 1965Lothar KehneApparatus for spiral pipe manufacturing
US3247692 *10 Oct 196126 Abr 1966Pacific Roller Die Company IncPipe making machine and method
US3417587 *15 Ago 196624 Dic 1968Garland Steel CompanySpiral pipe machine
GB189404513A * Título no disponible
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US4058997 *4 Abr 197722 Nov 1977Emil SiegwartApparatus for manufacturing tubes
US4353232 *28 Ene 198012 Oct 1982The Lockformer CompanyApparatus for making corrugated tubing and method for joining corrugated tubing
US4616495 *20 May 198314 Oct 1986Rib Loc Hong Kong LimitedHelically-formed pipe winding machine
US4957586 *17 Ago 198918 Sep 1990Ametex AgApparatus for producing a wound plastic tube
US700788711 Nov 20037 Mar 2006Sonoco Development, Inc.Tubular core with polymer plies
WO1991009693A1 *4 Dic 19903 Jul 1991Spiro Maschinen AgSheet steel strip, process and device for manufacturing lock seam tubing with helical seams
WO1991013702A1 *6 Mar 199119 Sep 1991Firmac LtdMethod and apparatus for forming one piece duct sections
Clasificaciones
Clasificación de EE.UU.72/49
Clasificación internacionalB21C37/12, B21C37/06, B23K9/032, B23K9/02
Clasificación cooperativaB23K9/0325, B21C37/121
Clasificación europeaB21C37/12B, B23K9/032B