US1000122A - Process for flanging tubes. - Google Patents

Description

G. H. REYNOLDS, DECD. A. n. muons, ADMINISTRATRIX.

PROCESS FOR FLANGING TUBES. APPLICATION FILED SEPT123, 1908.

1 ,OOO, 1 22. Patented Aug. 8, 1911.

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G. H. REYNOLDS, DEOD.

PROGESS FOR FLANGING TUBES.

1,000,122, Patented Aug. 8,1911.

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ABBY E. REYNOLDS, 0F MANSFIELD DEPOT, CONNECTICUT, ADMINISTRATRIX OF GEORGE H. REYNOLDS, DECEASED, ASSIGNOR TO GENERAL FIR-E EXTINGUISHER COMPANY, A CORPORATION OF NEW YORK.

PROCESS FOR FLANGING TUBES.

Specification of Letters Patent.

Patented Aug. 8, 1911.

Original application filed February 2, 1907, Serial No. 355,421. Divided and this application filed September 23, 1908. Serial No. 454,454.

To all whom it may concern:

Be it known that GEORGE H. REYNOLDS, deceased, who was a citizen of the United States, and resided in Mansfield Depot, county of Tolland, and State of Connecticut, invented a new and useful Improvement in Processes for Flanging Tubes, which I, ABBY E. REYNOLDS, administratrix 0f the estate of said REYNOLDS, fully set forthin the foldrawings illustrating a machine, which may be employed for carrying out the process and producing the product, accompany this specification, and therein: I

Figure 1 is a top-plan partially in section, illustrating a machine which produces the article and-illustrates the process; Fig. 2 is a sectional view illustrating the die-blocks and hammer-hen d with the pipe or tube end in position and illustrating a step in the process of flanging; Fig. 3 is a View similar to Fig. 2, showing the fiange completed; Fig. 4 is a partial section and elevation illustrating the parts as the flange is being completed; Fig. 5 is an end elevation of the hammer-head; Fig. 6 is a sectional view illustrating a mode of producing a joint from two flanged pipes or tubes; Fig. 7 is a sectional view illustrating an alternative mocle;of carrying out the invention; Figs.

'8. 9 and 10 are views similar to Fig. 7 and illustrating successive steps in the alternative mode of producing a flange; Fig. 11 is a partial section and elevation illustrating the formof hammer-head used in carrying out the alternative mode of the invention; and Fig. 12 is an end elevation of the hammerhead shown in Fig. 11.

Preliminarily, it may be stated that the invention herein set forth was disclosed in the application of said George H. Reynolds, Serial KO. 355,421, filed February 2, 1907, and this application constitutes division thereof.

Referring to the drawings, the numeral 1 ates as a cushion or butter.

1 indicates the frame of the machine which is composed of a series of longitudinal and transverse ties or beams, which ma be suitably heldtogether by bolts or other fastiening means and which support baseplates 2 and 3 for carrying the several parts of the apparatus. Tie-rods 4 and 5 extend longitudinally of the frame and are supported by standards 6, to which, lattersaid rods are securely bolted for the purpose of securing stability of the machine. One of the supports 6 carries die-blocks 7, which are made to conform to the shape of the article 8 to be flanged and the inner surface of which is grooved to form a shoulder 7 and beveled at 7 just back of said shoulder, the ,said article passing through said die-blocks, in which it may be firmly clamped in any suitable manner. A hydraulic mechanism, for actuating the hammer-head, consists of a cylinder 9 with the piston 10.1and rod 11 working therein and said piston having the forwardly-extending hammer-rod 12 secured to it, at the forward end of which is securely held the hammer-head 13 which, as shown, is recessed so as to provide the slightly curved cylindrical portion 14, which extends into the end of the tube or other article 8 to be flanged. The hammer-rod is journaled in the bearing 15, which supports it between its ends and gives stability and certainty to the movements of the hammer-head. The

rear end of the piston-rod is provided with worm-threads 16 cooperating with a worm sleeve 17 and the extreme end of said rod moves in a cell or chamber 18, which opersleeve 17 has the ratchet-wheel ltl'fixed thereto, which cooperates with a series of pawls 2 0 rto prevent backward movement.

As the pressure in the cylinder drives the hammer-head, this being an intermittent rotation or stcp-by-step movement. The form of the hammerhead is illustrated in Figs. 4 and 5 and comprises the angular hummer-block Q1 separated shown by the .9 0 The wormintervening curved portions 22, which are substantially, at thebase of the cylindrical portion 14:. Near the rear end of the ham mer-head, a flange 23 is provided, which cooperates with the ends 24: of the dieblocks and limits the inward movement of said hammer-head. The angular hammerblocks cooperate and correspond with the shoulders 7 of the die-blocks, and the cylindrical portion 14 of the hammer-head, entering the end of the article to be flanged, compels the flange to be outturned and prevents interior buckling.

As illustrated by this form of the mechanism and hammer-head, the process of flanging an article is as follows: A tube 8, e. g., see Figs. 2 to 4l,-is placed between the the blocks, which are operated upon to firmly clamp the end of the tube in alinement with the lltUIlHlQF-llOSCl and rigidly from movement. The apparatus is then started into action, whereupon the hammer-rod will be rcciprocated with an intermittent rotary movement, a movement of rotation alternating with a forward movement of the hammer-head; and each blow of the hammer-head upon the end of the tube resulting in simultaneously driving separated portions 8 of the end of the tube longitudinally of the latter and slightly at an angle thereto. and giving to other separated portions 8 a slightly outwardly-curved form at an angle to the length of the tube. The angular hammer-blocks 21 of the hammerhead produce the first etfect, while the curved, intermediate portions 22 produce the second effect, and the portions 8 and 8 alternating. A succeeding forward movement of the hammer-head, plus a rotary movement, will bring a curved portion 22 of the hammer-head into contact with one, of. the portions 8 previously produced by an angular portion 21 of the hammer-head, and will bring the angular portion 21 of the hammer-head into cooperation with a curved portion 8 previously produced by a curved portion of the hammer-head. This results in crowding longitudinally the previously deflected portions 8 of the tube and giving them a little greater curvature, and in slightly more curving the portions 8 of the tube. This operation is continued until a flange is produced, substantially as shown in Figs. 3, t and (3, wherein a flange 8 rectangular in cross-section is formed around the end of the tube and just forward of said flange the pipe or tube is considerably thickened, as at 8.

According to another form of the invention, the luunnier-head. is provided with the several rectangular hammer-blocks 25 alter hating with the curved portions 26, both said portions terminating at their forward ends in the shoulder '27. the flange and tubular portion ll of this l ainnier-head being in all material res ects substantially the same as in the other orm of hammer-head. The hammer-head is reciprocated and intermittently rotated in the same manner, but, as illustrated by this form of the mechanism and hammer-head, the process of flanging an article is, as seen in Figs. 7 to 10, that the end of the tube a is caused to buckle transversely of its length,*as at 66 by contact of the hammer-blocks 25 with the end thereof, as indicated in Fig. 8, while successive blows will result in producing a flange consisting of a portion a of the end of the tube superposed upon a portion a of the body of the tube back of the end, and crowding the two parts longitudinally of the tube and thickening the body of the same back of said flange at a as clearly illustrated by Figs. 10 and 11, this form of hammer and die resulting in producing a rectangular flange of double-thick material arranged at a rightangle to the length of the tube, with the thicker portion in the body of the tube at the inner face of the flange, as clearly indicated in said figures.- The separated hammer-blocks 25operate upon separated portions of the tube-end and the rotary movement of the hammer-head brings successive hammer-blocks into engagement with successive portions of the flange.

A connection made with pipe sections, produced as above described, is illustrated in Fig. 12, wherein,sin1ilar oppositely-disposed rings 28 are placed on adjacent, abutted ends of pipe sections, the said rings being made at their inner surfaces to conform substantially to the form of the flange of the pipeends, rivets or bolts 29 being then passed through the two rings to tightly clamp them together and in engagement with the ends of the pipe sections so as to produce a substantially fluid-tight joint. As an additional step in the process of flanging metal articles, the latter may be preliminarily heated, or heat may be applied to the article during the flanging operations. The application of heat to certain metals during or before the flanging operations prevents flaking and fracturing and facilitates the flanging process; and the atmospheric cooling of the article during the flanging operation results in concentrating the molecules of the metal and strengthening the completed flange.

Having thus described the invention, what I claim and desire to secure by Letters Patent is:

1. The method of flanging tubes, consisting in clamping the end of the tube rigidly in, position at a point a short distance back of its end, administering a number of blows directly on the end of the tube at separated points and at the same time sustaining the tube interiorly at its end and deflecting intermediate portions of the end of the tube,

whereby, at one and the. same time, portions of the end of the tube are bent or outturned and other portions of theend of the tube are both outturned and compressed longitudinally of the tube.

2. The method of flanging tubes, consisting in holding the tube rigi y in position at a point a short distance back from its end so as to prevent lateral movement thereof,

turning the extreme end of the tubelaterally to a certain degree at separated points along its periphery and intermediate portions of the end of the tube to a different degree, and continuing this operation until the several portions operated upon are brought into 15 contact with a. die-block when all said portions of the tube are compressed. into a flange rectangular in cross-section.

In testimony whereof I have hereunto signed my name in the presence of two sub- 20 scribing Witnesses.

ABBYE REYNOLDS,

Admim' stmtria: of the estate of George H. Reynolds, deceased.

Witnesses: v

E. E. BAss, H. D. POLLARD.

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