US2554093A

US2554093A - Apparatus for manufacturing tubes and the like from flat metal strips or bands

Info

Publication number: US2554093A
Application number: US40273A
Authority: US
Inventors: Desilly Lucien
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-08-06
Filing date: 1948-07-23
Publication date: 1951-05-22
Anticipated expiration: 1968-05-22

Description

May 22, 1951 I DESHLLY fiv flil APPARATUS FOR MANUFACTURING TUBES AND THE LIKE FROM FLAT METAL STRIPS OR BANDS Filed July 25, 1948 2 Sheets-Sheet 1 V j U 5 10 W INVENTOR;

LUGIEN DE$HJAY S D N A B R O s P I R m s L A u m W 9 3953 L. DESILLY APPARATUS FOR MANUFACTURING TUBES AND THE LIKE FROM FLAT Filed July 2a, 1948 2 Sheets-Sheet 2 W J a 14 1a ff u fy INVENTOR:

LUCIEH DESILLY Attormaig.

i atented May 22,

APPARATUS FOR MANUFACTURING TUBES AND THE LIKE FROM FLAT METAL STRIPS OR BANDS Lucien Desilly, La Louviere, Belgium Application July'23, 1948, Serial No. 40,273 In Belgium August 6, 1947 The present invention relates to an apparatus for manufacturing tubes and the like by bringing together the edges of fiat metal strips or bands.

In accordance with my invention, the strip or band is subjected to a gradual and continuous deformation under such conditions that the finished articles have exactly the desired cross-section and size and permanently keep their shape. The flat strips or bands are engagedbetween two grooved surfaces moving in unison, said surfaces being separated by a wedge-shaped space of curved outline, so that the strip or band engaged therebetween is progressively and continuously bent until its two edges are brought together and the desired shape is obtained.

It is the object of this invention to provide a simple and efiicient apparatus for manufacturing tubes as aforesaid. Such apparatus comprises two circular rotatable members, one being an internally grooved ring and the other an externally grooved disc mounted eccentrically within said ring, with its outer edge adjacent the inner edge of the ring. The two members are rotated in the same direction and their grooves co-operate to bend the strip longitudinally and to gradually shape it to tubular form. The disc may be adjusted in position to meet requirements. Suitablemeans are provided for guiding the strip into the space comprised between the two grooves and for directing the tube out of the apparatus.

In order that the invention shall be more readily understood reference will be had to the accompanying drawings which illustrate by way of example two constructional forms of my improved apparatus.

Fig. 1 illustrates diagrammatically, in crosssection on line II of Fig. 2, the essential parts of a horizontal apparatus.

Fig. 2 is a plan view of same.

Figs. 3, 4 and 5 are cross-sectional views, similar to Fig. 1, illustrating modified arrangements of the parts.

Figs. 6, 7, 8 and 9 respectively show successive phases in the manufacture of a tube in the apparatus shown in Figs. 1 and 2.

Fig. 10 is a view in elevation illustrating a vertically arranged apparatus.

Figs. 11 and 12 are cross-sectional views on line XIXI and XII-XII respectively of Fig. 10.

Figs. 1 and 2 illustrate the disc [0 and ring II which are the main essential parts of the apparatus. The disc I0 is substantially smaller than and is arranged eccentrically within the ring ll.

Both disc and ring are rotated in the same direction, their respective centers being shown at I2 v 6 Claims. (Cl. 153-54) 2 and I3 in Fig. 2. It will be understood that by varying the distance between said centers the shape of the cross-section of the finished article can be varied.

In the outer periphery of the disc 10 and the inner periphery of the ring I I are provided semicircular grooves which define together a space I l between the two rotating members, which space is of circular cross-section where the said members are adjacent, as shown on the right hand side of Fig. 1. Where the disc and ring are spaced apart, I may provide leading in rolls I5, l5a (Fig. 1) or a fixed guide I6 (Fig. 3) or a rotary guide piece which may be a side flange Illa on disc I!) (Fig. 4) or a side flange Ha on ring ll (Fig.5).

In operation disc ill and ring H are rotated in the same direction, as shown for example in Fig. 2 by the arrow 9:. The flat strip I! to be shaped is introduced into the space it at y, where the open gap between the parts I0 and II is wider than the width of the strip. It is caught between the rolls 15, la whereby it is guided into the space 14 which has the general shape of a curved wedge tapering from y to a. While it nears the point of maximum construction .2, the strip 11 is gradually shaped by the grooves defining the space M as illustrated in Figs. 6 to 8. At 2 shaping is completed and the strip is bent edge to edge into a tube lia (Fig. 9). Additional pairs of rolls such as i5, [5a may be provided between 11 and z, or other guide pieces such as the plate It or the flanges lilo. or Ila may be provided.

Beyond 2, the space between disc 10 and ring ll again increases in cross-section, so that the finished tube can be diverted side wise and with.- drawn from the apparatus.

In the form of apparatus illustrated in Figs. 10 to 12, the disc l0 and-ring II are arranged vertically in eccentric relation to each other and they are provided with toothed rings l8, [8 re-.- spectively, in mutual engagement, so that they are adapted to rotate in unison in the same direction. The disc it is driven by its shaft I!) which is journalled in bearings 26 and is rotated from a motor 2| through reducing

gears

22, 23, whereas the ring I i is freely supported on rollers 24 journalled in the casing 25 which is made of two parts to provide easy access to the inside of the apparatus.

The strip or band to be shaped (not shown) is fed to the apparatus by means of guiding

rolls

26, 21, 28.

The first pair of rolls 26 have peripheral grooves for engaging the edges of the strip which is fed in a vertical plane. The distance between the rolls 26 is regulable by means of a screw 36 which engages threaded holes in pins 3| carrying the rolls 26, said pins being slidable towards and away from each other in a frame 29 secured to the casing 25. The pins 31 are each made of two parts connected by a vertical pivot 30 so that the angular position of the rolls 26 and consequently of the strip can be varied as required.

Being guided by the rolls 126 the strip enters the as 25 throu h an openiii W5 $1. caught by the second pair of rolls 21 which is almost in line with the shaping gap M. The rolls 2'! are preferably slightly curved as shown in order to initiate the shaping operation.

Just before the point where the strip. is, caught between the disc [0 and ring I I is a further guiding roll 28 which leads the slightly curved strip into the gap 14 where the shaping operation is completed in the manner shown in Figs. 6 to 9. A window 33 is provided in the wall of the casing 25 to permit of watching and if necessary correcting the positioning of the strip in the shaping space [4.

The finished tube is led away through the side of the casing opposite the inlet side, the outlet side of the casing being provided with a funnelshaped guide 34 merging into an outlet pipe 35 of sufiicient length to cause the outgoing tube to straighten up.

It will be understood that the shape of and distance between the grooves in the disc and ring may be varied according to the shape of the articles to be produced and that details of construction of the apparatus may be varied without departing from the invention as defined in the appended claims.

I claim:

1. An apparatus for making substantially continuous tubes by longitudinally bending a Hat metal strip, comprising a ring having a shaping surface on its inner periphery, a disc having a shaping surface on its outer periphery, said respective shaping surfaces being complementarily concave with respect to one another, said disc being mounted eccentrically within said ring and adjacent its inner periphery, means for rotating said disc and ring in unison in the same direction, means for guiding said strip into the space between said disc and said ring for progressive edge-on deformation thereby, and means for guiding the substantially continuous, tubular shape'dstrip out of said space.

2. An apparatus as claimed in claim 1, having means for closing at least one side of the space formed between the shaping surface on said ring and the shaping surface on said disc.

3. An apparatusas'claimed in claim 1, wherein the shaping surfaces on said ring and said disc are. of semi-circular outline.

4. An apparatus as claimed in claim 1, wherein the means for guiding said strip into the space between said disc and said ring comprise a pair of grooved rollers arranged at an angle outside said ring and at least a pair of rollers arranged within said ring.

5. An'apparatus as claimed in claim 1, wherein the means for guiding said strip into the space between said disc and said ring comprise a pair of coacting rollers having curved peripheral surfaces for imparting an initial curvature to the strip to be shaped.

6. An apparatus as claimed in claim 1, wherein the means for guiding the shaped strip out of the space between said disc and said ring comprise a funnel-shaped outlet followed by a straight outlet tube.

LUCIEN DESILLY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 40 617,363 Skogse Jan. 19, 1899 829,990 McKee Sept. 4, 1906 2,449,206 Dryer et a1. Sept. 14.1948

FOREIGN PATENTS Number Country Date 98,098 Germany July 13, 1898