US1266470A - Machine for forming tubes. - Google Patents

Description

J. L. HOSACK. MACHINE FOR FORMING TUBES. APPLICATION FILED SEPT- no. 19H.

Patented MayM, 1918.

3 SHEETS-SHEET I.

Ham-s5 I. L. HOSACK.

MACHINE FOR FORMING TUBES.

APPLICATION FILED SEPT- I0. I91].

Patented May14, 1918.

3 SHEETS-SHEET 2.

1311mm .MMEE Lwamlt J, L. HOSACK. MACHINE FOR FORMING TUBES. APPUCATION HLED SEPT. I0. l9! 1.

Patented May 14, 1918.

3 SHEETS-SHEET 3- w E w LJIIJIMK.

JAMES LUTHER HOSACK, or WOODSTOCK, TUBE a-runcn 00., LTD., or

ONTARIO, CANADA, ASSIGNOR TO STANDARD WOODSTOCK, ONTARIO, CANADA.

MACHINE FOR FORMING TUBES.

Specification of Letters Patent.

Patented May 14, 1918.

Application filed September 10, 1917. Serial No. 190,526.

To all whom it may concern.

Be it known that I, JAMES LUTHER Ho- SACK, a subjectof the King of Great Britain, residing in thecity of \Voodstock, in. the

rovince of Ontario, Dominion of Canada, have invented certain new and useful Im provements in Machines for Forming Tubes, of which the following is a specification.

This invention relates to in'iprovements in machines for forming tubes of the type in which tubes are formed from strips of metal passedlongitudinally through a plurality of forming rolls and dies, to give them their final shape and the objects of the invention are to enable the forming operation to be more effectually perforn'ied.

According to the present invention, a forming roll having a stationary axis is provided adapted to cooperate with a series of flat dies in endless chain formation adapted to move axially with the tube over a plane surface opposite the roll in the manner hereinafter explained and more fully set forth in the accompanying specification and drawings.

Referring to the drawings:

Figure 1 is a side iew of the portion of the machine embodvinc' the pre ent invention.

Fig. 2 is a longitudinal sectional v therethrough.

Fig. 3 is a perspective view of one of the flat forming dies.

Fig. 4 is a plan view of one of the flat forming dies.

Fig. 5 is a cross sectional view of one of the flat forming dies.

Fig. 6 is a transverse section through one of the forming rolls and dies.

In the drawings like characters of reference indicate corresponding parts in each figure.

The present invention is designed to form part of a tube forming machine, and the function performed by the cooperating rolls and dies. which depends upon the shape of the die surface, is usuallv that of effecting the final closing of the tube.

Referring to the drawings. A represents the frame of the machine which supports a plurality of pairs of rolls B. single rolls 10 and guides ll. The nature and construe tion and number of the forming rolls and dies does not form part of the present invention, and is disclosed in the United States ie W Patent No. 724426.

Certain of these rolls will be driven by gearing in the usual way to draw or force the metal which is to be formed through the machine.

he present invention includes a fori'ning roll C having a stationary axis and an end less series of flat forming dies D. The stationary roll is supported from suitable adjustable bearing blocks 12 of any desired character. The roll (1 may be power driven if desired. or may simply be permitted to be turned by the frictional contact of the tube as it is drawn through the machine.

The endless series of forming dies D comprise carriers 13 and die blocks 14 mounted on the carriers. Each carrier is formed on opposite ends with lugs 15 adaptedto enter between lugs 16 and 17 on the adjacent blocks, the said lugs being adapted to receive a suitable pivot pin 18, whereby the carriers form an endless chain. The die block 14 itself may be made of steel heat treated for proper hardness and. suitably grooved for the size of the tube. It is fastened to and held in alinenient with the carrier by a tongue 19 fitting in a groove 20 in the carrier, being held therein by suitable means, such as dowel pins 21 and fillister headed cap screws 22.

The endless series of carriers 13 are guided in position opposite the forming roll C by means of a semi-circular uide-way E, having side flanges 23 and 24 eld in position by the screws 25 and 26. The guide way itself is adjustably held in position, the means I have shown to accomplish this comprising clamping bolts 27 extending through the frame and through slots 28 in a flange or web 29 on the guide way.

The guide-way E is formed opposite the roll C With a flat or plane face 30, the length of which is equal to or greater than the length of two of the dies, whereby two of the dies will always be in position opposite the forming roll with their faces in alinement, and parallel to the axis of the tube being formed.

In practising the invention, a steel strip of suitable thickness and width is fed to the machine and the tube is gradually formed by a number, which may be five, or more pairs of rolls B, the surface of the rolls being suitably ooved to gradually bend the strip into a most perfect circular form. The tube thus formed is then suband withoutibeing tuneler the necessity of transferring the tube to a separate closing former.

The degree of pressure.by the roll and die blocks may be regulated by the adjustable screws30, operating to move he ring blocks 12 in the guide way 31. It wi'l also be evident that my improved forming roll series of die blocks may be applied to some ofjthe preliminary operations in the femur tion of tubing, and not merely for finally (losing and setting the joint of the tube. By variations in the form of die surfaces, various kinds of cylindrical, oval and angular shapes may be made.

\Vhat I claim as my invention is:

1. In a tube forming machine, in combination, a pivoted forming roll, a support for the tubeto be formed comprising a stationary support and a series of movable Copies of thlscpatent may. be obtained for elongated flat dies in endless'chain formation contacting with the tube under the roll, and means formowingflie oontimlnusty to I and from, smpmi rtmg 5 gnition.

The device of claim 1 with the addition of guiding means for the dies.

3. In a tube forming machine, in combimrwbionna forming roll, a plmeiswfiifl e opposite the same, an endless series of flat forming dies and means for moving said dies longitudinally with theitub eiover the plane surfaee.

1. In a tube forn'tingi machine, in combination, a. forming roll, a plene' surfaeeopposite the same, an. endless series' of forming dies and means for moving said dies longitudinally with the tube over the plane surface, at least two of said (lies being on the surface together, and forming thereon a continuous the surface which engu es the tube.

11 witness whereof I have hereunto set hand in the presence of two witnesses.

J AMES LUTHER HOSAGKS Witnesses HENRY A. 'LITILE, ADELENE MACKA'Y.

the cents each,-ny addressing the Gmhmissiontr at flaunts.

Washington, 3.0.

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