US1384103A

US1384103A - Method of flattening pipe

Info

Publication number: US1384103A
Application number: US356247A
Authority: US
Inventors: Howard W Smith
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-02-04
Filing date: 1920-02-04
Publication date: 1921-07-12
Anticipated expiration: 1938-07-12

Description

HOWARD W. SMITH, 0F ELLWOOD CITY, PENNSYLVANIA.

METHOD OF FLATTENING PIPE.

Application filed February To @ZZ 107mm t may 0012 cern Be it known that l, HOWARD WV, SMITH, a citizen of the United States, and resident of Ellwood City, in the county of Lawrence and State of Pennsylvania, have invented a new and useful Improvement in Methods of Flattening Pipe; and do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to methods of scrapping defective pipe.

In the manufacture of pipe, defective pieces are produced from time to time which have not been properly welded or may have some other defect so that the pipe has to be scrapped. The pipe in tubular form is very difficult to handle as scrap either for remelting in the furnace or for shipment.

The object of my invention is to provide a simple and eflicient method of scrapping this defective pipe, and to these ends my invention consists, generally stated, in introducing the pipe between rolls whereby rolling pressure is applied to opposite points in the circumference of the pipe, and the pipe is crushed or reduced to a flattened form, or substantially so.

In the accompanying drawing, I have illustrated suitable apparatus for carrying out my improved method in which Figures l and 2 show smooth faced rolls for this purpose; and in Fig. 3 the method is carried out by corrugated rolls.

The defective section of pipe 2 to be flattened is fed cold to the plain rolls and by pressure, either hydraulic or other power, the pipe, with the end entering the rolls of the original shape and diameter, is forced in between the space between the rolls, and the rolls will be rotated by the forcing of the pipe in this manner through the same. T he front end of the pipe will be reduced, and having passed beyond the rolls the remaining portion of the pipe will be forced through so that the pipe is flattened and reduced by the pressure applied from opposite points on its circumference, the metal being free to spread laterally without restraint.

My improved method can further be carried out by the use of corrugated rolls, as shown in Fig. 3, and two sets of such rolls t and 5 may be employed. These rolls are power-driven in any suitable manner, and are driven to rotate in opposite direction as indicated by the arrows. The pipe 7 to be Specification of Letters Patent.

Patented July i2, i921.

4, 1920. Serial No. 356,247.

flattened is advanced into the rst set of corrugated rolls 4, whereupon the corrugations will act to pinch or break down the end of the pipe as indicated by dotted lines, and the pipe will be sent forward between the corrugated rolls, each succeeding pair of corrugations acting to pinch and reduce the pipe so that the pipe is formed in a flattened wavy condition as indicated. ln case it is desired to further reduce the pipe, a second set of rolls 5 with smaller corrugations is employed and the same action takes place, so that the pipe is further iiattened as it is advanced through this second set of rolls.

ln case it is not desired to have the pipe in the wavy condition due to the corrugations, a plain set of rolls 8 may be employed for a final pass to smooth out the waves formed by the corrugated rolls.

y my improved method, I provide a simple and etlicient way of reducing uniformly pipe of large diameter, for where the corrugated rolls are employed the pipe will be pinched and reduced by each succeeding pair of corrugations, and fed through the rolls. Furthermore, the same corrugated rolls may be employed for pipes of many different diameters, it only being necessary to have pipe of such diameter that it will enter between the corrugations and be pinched or reduced by the succeeding pair.

By my invention, I provide a method which does away with the old method heretofore generally employed, of introducing the pipe between the dies of a press or between hammer dies and feeding the pipe forward So as to bring its dierent portions of its entire length under the action of the press or hammer, and such an operation is very slow and tedious and requires great power.

What I claim is:

l. The method of scrapping defective pipe, consisting in forcing the pipe longitudinally between rolls with the end entering the rolls being of its original shape and diameter, and allowing the metal to spread laterallv without restraint.

2. The method of scrapping defective pipe consisting in forcing the pipe longitudinally through corrugated rolls, the end entering the rolls being of its original shape and diameter, pinching the end of the pipe and drawing it in by one pair of corrugations, and subsequently pinching and drawing in the pipe by the succeeding corrugations in succession, and allowing the metal to spread laterally ywithout restraint 3. The method of flattening pipe comprising forcing the'pipe longitudinally between corrugated rolls and straightening the flattened pipe by passing it between -a'set of Y plain rolls.

l. The method of scrapping vdefective pipeconsisting in forcingthe pipe longitudinallybetween corrugated Tolls, forcing the flattened pipe betweencoirugated'rolls having smaller coi'iugations, and straightening ,the flattened pipebypassing it between a Set HOWARD W.. SMITI-L Witnesses Y e. A. PUGH; W'. J. MOORE.