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US449624A - Sheet-metal-flanging machine - Google Patents

Sheet-metal-flanging machine Download PDF


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US449624A US449624DA US449624A US 449624 A US449624 A US 449624A US 449624D A US449624D A US 449624DA US 449624 A US449624 A US 449624A
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    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers


Ll.. e e h s m e e h S s a. d o M o m APatented Mar. 31, 1891.

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No. 449.624.v a y Patented'Mar. 31, `1891.

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Patented Ma1.31,1891.

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SPECIFICATION forming part of Letters Patent No. 449,624, dated March 31, 189.1.

` Application filed August G, 1890.

To @ZZ who/1t it 'nz/(ty concern.-

Be it known that I, JOHN A. KURTZ, a resident of Allegheny city, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Flanging-Machine's; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

The object of the invention is to provide a simple and efcient machine for bending blanks to produce rings for protecting screwthreads and other purposes, and for Hanging said blanks and for removing them from the Hanging-rolls; and it consists in the matters hereinafter described and pointed out.

In the accompanying` drawings,Figure 1 is a plan of the Hanging-machine, the -bending devices being omitted. Fig. 2 is a transverse section, the throwingbff lever being omitted. Fig. S is a side elevation of rolls, shafts, supporting-frame, and driving-gears. Fig. 4 is a plan of sheet-metal blank. Fig. 5 is a plan of amodied blank. Fig. G is a section ot' the modified blank partially formed into a ring. Fig. 7 is a transverse section of the complete band, and Fig. 8 is a side elevation of the ring applied to a section of pipe. Fig. 9 is a section on line @c of Fig. 1.

Numeral 1 indicates a roll-su pportin g frame, which may be of any convenientand suitable form. In the posts or uprights of the frame are journaled shafts 2 and 3, which are provided, respectively, with gears at and 5. A pulley-shaft is denoted by 6, and 6 indicates a driving-pulley.

7 is a pinion on shaft 6, which gears with wheel S on shaft 10. Said shaft 10 has a pinion 9, which drive gears 4E and 5.

The shafts 2 and 3 have removably secured thereon the respective rolls 11 and 12. These shafts are preferably free or unsupported at their outer ends; but for so me of the purposes of the invention these outer ends may be journaled in an upright. The rolls are keyed to their shafts and removably secured thereto by means of a screw-nut 10 and removable collar 102 or by other devices, so as to permitthe substitution of others when desired. For

this purpose the shaft-bearings are made adjustable by well-known means, 13 13 indicat- Serial No. 361,218. (No model.)

ing screws which engage journal-boxes 17. One roll, as 12, is made longer than the other and provided with a portion having a reduced diameter, as indicated at 14 14. At 1-5 the diameter of the roll may be still further reduced, as shown. The roll 11 preferably has its edges beveled at 1G. plate for the rolls is indicated by 1S. This guide preferably has a table 19, and is arranged adjacent to the space between the rolls. On the opposite side is a bracket 20, to which is hinged a deecting table or plate 21, made adjustable by means of a hinged screw-bolt 22, having a nut 23. Said nut can be run up or down on the bolt, so as to raise or lower the outer end of the plate 21.

24 is a lever pivoted at any convenient point. In the present instance it is represented as pivoted to the top of the guide- 'plate 18 at 25.

The machine above described is intended to bend and flange blanks such as illustrated in Figs. l and 5. The blank before it is passed between the rolls may be provided with a tongue 2G and a slot 27, whereby the ends of the blank may be subsequently coupled, as indicated in Figs. 7 and S; but this is not essential, as the plain blank can be bent and flanged and its ends then riveted together to form a ring or band. The table 19 of the guide can,'\vhen desired, be provided with a depression or channel 19 to permit the tongue to pass across the same.

To bend and iiange the blank it is introduced through the guide and between the rolls, which are suitably revolved to draw or carry the blank between them. As it emerges from between the rolls its end is turned upwardly by the plate 21, and the blank is bent in the form of aring. Thedepressed portion 15 of the roll 12 permits the free passage of the bent tongue 26. This tongue can be omitted, however, or it could be formed subsequently to the bending, in which cases the depressions 15 and 19 could be omitted and the part 14 of the roll could beextended, as indicated by dotted lines. During the passage ot the blank between the rolls, said blank being wider than the distance between the shoulders 14', formed by the depression 14, it is forceddown between said shoulders by roll 11, arranged, as shown, for that pur- A guide or guidei IOO pose. This part of the operation bends the edges of the blank and forms ilanges 2G thereon. The edges of roll 11 are beveled to avoid breaking the nletal in this operation, which forms anges practically at right angles to the main surface of the blank.

If the machine as illustrated in Fig. is used, the bent'band or ring will require to be opened for its removal from the upper roll, which can be done in some cases; but ordinarily rolls with free outer ends are used. 'l`o remove the rings in the latter case, the lever 2i can be adjusted on its hinge, so as to engage the inside of the free end of the open band as it is bent over and around the upper roll, and by the inclination of the lever bear said band to one side, whereby it will be thrown oit' the end roll. This operation imparts what Ymay be termed a twist to the band, whereby its flanges are adapted to run in the scre\\-threads of a pipe, asindicated in Fig. S. This lever, having been suitably adjusted for bands of particular size7 can be fixed in position by any known means. It is not of the gist of this part of the improvement that the bar behinged, since a fixed bar or roll could easily be substituted without varying the operation substantially.

The means above described for throwing the band from the roll, and also for permitting the removal of the roll and adjusting the shaft-bearings are not limited in their use to the particular construction whereby the band is flanged. The throwing-oftl device, whether it be a bar or an equivalent roller, is preferably placed near thet'eeding-table and above the same, as represented, though the precise location is not of the gist ofthe improvement.

The article would be thrown oil' were the bar or roll snitabl y arranged at any point above the table and so as to engage the end of the metal when curved by the rollers.

Other parts of the machine may be varied by skilled mechanics without departure from the invention, provided substantially the same construction and principles ot operation are maintained.

Having thus described my invention, what I desire to secure by Letters Patent is- 1. In a Hanging-machine, the roll 11, having a beveled edge, in combination with the roll 12, having a depression l-t of greater length than the roll first named, and a depression 15, adapted to permit the passage of a narrow '[iange or projection on the end of the blank, the surface of. said roll being arranged in the depression first above named, substantially as set forth.

2. In combination with the rolls, one of which has a depression 15, a guide-table having a similar depression, substantially as set forth.

The combination, with the rolls adapted to form a ring of' sheet metal, of a hinged bar located at one side of a plane which passes between the rollers, said bar being adapted to beheld at an inclination to said plane, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.




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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4633698A (en) * 1983-12-21 1987-01-06 Hans Oetiker Method for preforming a substantially flat blank of an open clamp
US4811581A (en) * 1983-12-21 1989-03-14 Hans Oetiker Apparatus for preforming a substantially flat blank of an open clamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4633698A (en) * 1983-12-21 1987-01-06 Hans Oetiker Method for preforming a substantially flat blank of an open clamp
US4811581A (en) * 1983-12-21 1989-03-14 Hans Oetiker Apparatus for preforming a substantially flat blank of an open clamp

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