US1486977A - Corrugating machine - Google Patents

Description

March 18 1924. 1,486,977

B. J. LINDGREN CORRUGATING MACHINE Filed Aug. 22. 1921 4 sheets-sheet 1 March 18 1924. i 1,486,977

B. J. LINDGREN CORRUGATING M ACHINE Filed Aug. 22. 1921 4 Sheets-Shet 2 fig. Z.

4 N' g ZvenU/ March `18 1924.'

t B. J. LINDGREN CORRUGATING MACHINE Filed Aug. 22. 1921 4 sheets-shea 4 Patented Mar. 18, 1924.

BROR J. LINDGR-EN, OF BUFFALO, YORK, ASSIGNOR TO. NIAGARA. MACHINE & TOOL WORKS, 01E' BUFFALO, NEW YORK, A CORPORATION.

CORBUGATING MAcHrNE.

Application med August z2, r1921. serial No. 494,044.

To all whom z'z may concern:

Be it known that l, Bron J. LINDGREN, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful,v

Improvements in Corrugating Machines, of which the following is a specification.

This invention relates to a power driven machine for corrugating sheet f metal rand relates more particularly to a machine for performing the initial operation upon sheet metal plates which, after undergoing a number of further consecutive mechanical steps, finally become sheet metal, corrugated stove pipe elbows or Ls.

One of the objects of the present invention is to provide a machine which may be adjustably altered so as to produce plates of different size and having a diiferent number of corrugations so as to enable the same to be fabricated into stove pipe elbows of different commercial sizes. A further object of the invention is to produce in said plates,

not only a plurality of longitudinal corrugations, but also offset corrugations as well, so

as to permit said plates to be subsequently curled into cylindrical shape with their overlapping edges fitting together snugly and smoothly.

In the accompanying drawings: Figure 1 is a front view of the complete corrugating machine, partially in section and taken on line 1 1 Figure 2. Figure 2 is'a top plan view of the machine. Figure 3 is a left end elevation of the same, partially in section and taken on line 3-3 Figure l. Figure fl is a vertical, transverse section through the Inachine taken on line 4F-4L Figure 2. Figure 5 is an enlarged, vertical, longitudinal, fragmentary section through the upper and lower corrugating rollers and taken on line 5 5 Figure 4L. Figure 6 is an enlarged, substantially vertical, longitudinal, fragmentaryv through the rollers taken on line 7 7 Figure,

5. Figure 8 is a very greatly'enlarged, vertical, longitudinal, fragmentary section through the rollers taken on line 8--8 Fig-' ure 7. Figure 9 is a fragmentary perspective view of a typical corrugated metal plate such as produced by the machine. Figure 10 is a fragmentary vertical transverse sec` tion somewhat similar to Figure 7 but showing the construction of the removable offset blocks and taken on line 10-10 Figure 5. Similar characters of reference indicate corresponding parts in the several views.

Figure 9 illustrates the product which the machine produces and which consists of a plate 10 of sheet metal provided with a plurality of longitudinal corrugations or corrugated ribs l1 and a plurality of offset corrugated ribs 12 (see Figure 8) formedat the one end of said' longitudinal ribs. The said corrugated ribs 1'1 and 12 stop short of the opposite ends of the plate and thereby form flat end extensions 13. The width of said eX- tensions (i. e., the distance across the same measured transversely ofthe ribs 11) is the same for all ordinary sizes of stove pipe elbows. Also the length of the offset corrugated ribs 12-is the same for all ordinary sizes of stove pipe elbows. The total overall length and widthof the plate 10f' and also the'number of corrugated ribs 11 and 121are, however, somewhat different for the different sizes of pipe elbows. To produce or corrugate these different sized plates on the one machine is the principal obj ect ofthe present invention. y

14 represents the main frame of the machine in which are suitably journaledl an upper corrugating roll 15 and a lower corrugating roll 16, said rolls being disposed hor` bearing box 21, and upon'v its eXtreme outer v end, is journaled alarge driving'spur gear sus` 22. The latter meshes with a plnlon'gear 23 mounted on a jack shaft 24,*whi'chv latter is suitably journaled in4 thefmain'framev of the machine Vand carries'a driven. spur gear 25 at its inner end. The latter gear, in turn, meshes withV a driving pinion 26 mounted on a pulley shaft 27 which is suitably journ'aled'inlthe main frame of the machinefand carries the customary tight and loose pulley wheels'29 Vand 30 at its outer end, the same being suitably belted to any available source of power. The engagement of the driving belt (not shown) with either the loose or the tight belt pulley 29 or 30 as the case may be is controlled by the usual pair of belt tongues or arms 31 which are secured to a longitudinally-slidable, square shaft 32 actuated at the opposite end of the machine by a suitable belt-control lever 33 which is pivoted to the main frame of the machine at 34.

Arranged upon the lower, corrugating roller shaft 20 is a clutch 35, which is actuated by a suitable bell-crank lever 36 pivoted to the main frame of the machine at 37. This lever 36 is operatively connected through a link 39 with an outer arm 40 secured to a short, stub shaft 41 suitably journaled in one of the end plates of the main machine frame. The inner end of said stub shaft carries an arm 42 which is operatively connected, through a suitable link 43 and arm 44, with a long, horizontal, longitudinal, pedal shaft 45 which extends the full length of the machine frame and is suitably' journaled at opposite ends therein. Thisy pedal shaft is provided near its one end with a substantially horizontal, forwardly extending pedal 46, which is normally held resiliently in its upper position by means of a suitable tension spring 47 (or otherwise), whose upper end is secured to the main frame of the'machine (see Figure 4).

When the machine is in normal operation, the pulley shaft 27 and the jack shaft 24 and also the large driving gear 22 are all rotating constantly, but the rest ofV the inachine is idle. Now when the .operator of the machine desiresto impart motion to the corrugating rolls 15 and 16, he depresses the pedall 46 which actuates the bell-crank lever 36 and also the aforementioned clutch 35, thereby power-connecting the large driving gear 22 to the lower corrugating roll shaft 26, and causing the latter to rotate. By mcanswhich are well known in the art and do not concern the present invention, this shaft 20 is always brought to a stop in the same position and is only permitted to rotate one revolution for each depression of the aforesaid pedal 46. lt is thus evident that the corrugating lrollers 15 and 16 remain at rest (in the position of Figure 4)y until the operator depressesthe pedal 46, whereupon both of saidrollers make one complete .revolution and again come to rest.

Secured to the main frame of the machine is a forwardly projecting, horizontal table 5() upon which the operator places the blank of sheet metal which is to be'corrugated, said blank being properly positioned thereon by a side locating block or stop gauge 51 and a lengthwise gauge or front stop bar 52. The

latter is adjustably movable forwardly and backwardly and is rigidly secured to a horizontally slidable cross-head or guiding plate 53 whose opposite longitudinaly sidesr bear snugly against the inner vertical walls of a guide 54 formed in the upper face of the table 50. By reason of this guide 54 and cross-head 53, the front stop bar or gauge 52 is caused to remain parallel at all times to the corrugating rolls 15 and 16. Said gauge 52 is adaptedV to be secured in any desired position by means of adjusting bolts 55, whose sh anks are received within suitable slots 56 and whose heads are adapted to bear upwardly against the under surface of the table 50.

A portion of the periphery of each of the corrugating rollers 15 and 16 is a smooth, cylindrical and unbroken` surface 57. The said cylindrical surface, however, of neither of said rollers ever touches the sheet metal plate 10 (see Figure 4). Formed upon each of the corrugating rolls, adjacent to 'the said cylindrical surface 57 thereof, are a plurality of longitudinal corrugations 59 which extend a considerable distance around the periphery of each of said corrugating rolls and extend substantially the full length of the same. Also formed longitudinally in each of said corrugating rolls and disposed interm-ediately of the longitudinal corrugations 59 and the cylindrical surface 57 thereof, are a plurality of flat recesses. 60 whose bottoms are disposed obliquely relatively to a radius theoretically drawn therethrough from the axis of rotation of the companion corrugating roll. Adapted to be arranged in said recesses and suitably secured in place by cap screws 61 are a number of detachable, corrugated bars 62 having two corrugations formed on each of the same. Also adapted to be disposed', if desir-ed, in one of the said recesses 60 of each of said corrugating rolls 15 and 16 is a modified detachable, corruA gated bar 63 having only one corrngation formed on the outer face of the same. YWhen the machine isL being set up for producingcorrugated metal sheets 1() intended to be Vsuitable for fabricating the smallest size of stove pipe elbow, then both the corrugated bars 62 and 63 are removed entirely. lf, on the other hand, it is desired to produce a larger sizeof stove pipe elbow requiring, for instance, the addition of an even number of corrugated ribs 11, then one or more bars 62 are placed in position in the aforesaid recesses 60 and secured therein by the screws 61. If, however, the desired additional number of corrugated ribs 11 is an odd number, then one of the single corrugation bars 63' is employed, and (if also required) one or more of the double corrugated bars 62 in addition thereto. (See Figure 10).

` Formed in the corrugating roll 15 at one end of the longitudinal corrugations 59 thereof are a plurality of outwardly olfset corrugations 64 which are of substantially the same shape as, and are longitudinally in line with, said longitudinal corrugations 59, but their inner ends are disposed outwardly somewhat therefrom, i. e., further outwardly from the axis of said roll 15. These outwardly offset corrugations 64 may be made integral with the main body of the corrugating roll, but for purposes of manufacture, the same are preferably construct-4 ed, as shown, on the periphery of a separate, offset corrugation collar 65 which; is preferably press-fitted over the reduced end or journal of the said roll 15. Cooperating with said outwardly offset corrugations 64 arranged upon said upper roll are a plurality of inwardly offset corrugations 66 arranged upon the lower roll, the inner ends of said corrugations 66 being disposed inwardly of the main longitudinal corrugations 59 of the lower roll, i. e., closer to the axis of rotation thereof. it is the co-l action (see Figure 8) of these outwardly offset corrugations 64 and inwardly offset corrugations 66 which produces the offset corrugated ribs 12 of the metal plate 10 heretofore described. The purpose of said ribs 12 is best comprehended when it is understood that after the initial operation upon the sheet 10 has been completed by the hereindescribed corrugating machine, that said she-et 10 is curved up into a cylindrical tube the axis of which is transverse of the ribs l1, and with the aforesaid offset ribs 12 overlapping the opposite extreme ends of the said ribs 11. It should be noted thatv in any sized sheet 10 whatsoever the number of ribs 11 and 12 are in all cases equal to each other. rlhis means merely that, when. a certain number of corrugated bars 62 and 63 are added to or removed from the corrugating rolls 15 and 16, a like number of outwardly, offset, double-corrugated blocks 70, (and perhaps, in addition a single-corrugated, outwardly offset block 71) are added to the upper corrugating roll 15 and the same arrangement and number of inwardly offset blocks 72 and 73 added to the lower corrugating roll 16. These offset. blocks are received within longitudinal recesses 74 which are formed adjacent to the outermost offset corrugations 64 and 66 respectively and similarly to the manner in which the corrugated bars 62 and 63 are received within the recesses 60, and similarly secured therein by cap screws 75.

The manipulation of the machine is as follows: The operator rst moves the belt lever 33 from its dotted line position to its full line position, thereby shifting the usual flexible driving belt (not shown) to the tight belt pulley 30. Then he places a blank piece of fiat, sheet metal (previously cut to a proper length and width) upon the table 50 in the position indicated in Figures 2,

3, 4, and 5, with its outer edge or rear bearing against the inner face of the gauge 52 and its left edge positioned by the side gauge 51. In this position the fro-nt portion of the said blank extends forwardly through the interstice between the rollers 15 and 16 (seeFig. 4) without, however,`

and rear parts 13 of the sheet or plate 10 l are, however, left uncorrugated, these portions 13 `going lto make up the male and female ends of the stove pipe elbow which ends are formed during a subsequentoperation upon the sheet 1() and permit the completed sto-ve pipe elbow, in the usual and well kno-wn manner, to slip respectively into and around the adjacent male andl female ends of adjacent stove pipes, so as to effect a smoke tight junction therewith. If the operator desires to alter the machine, so as to produce either larger or smaller plates 10 and create a larger or smaller number of corrugated ribs 11 and 12 thereon, then he adds to or removes from both rollers 15 and 16, a like number of double corrugated bars 62 (and if necessary the single bars 63) andV also theV offset double corrugated blocks and 72 (and if necessary the single corrugated blocks 71 and 73). These bars and blocksv are ldetachably held in their obliquebot-4 tomed recesses by the several cap screws 61 and 75. It is obvious that for larger or smaller sizes of plates 10, the gauge bar 52 must be set either rearwardly or forwardly, and locked in position by adjustment bolts 55, but the ysame is always retained in a position parallel to the corrugating rolls 15 and 16 by reason of the co-action ofthe sliding head 53 and guide 54. The longitudinal position of the end gauge block 51 is, however, never shifted, because the'overlapping orolfse-t corrugated ribs 12 are of the same ylength for every size of stove pipe elbow;

The length ofthe corrugated ribs 11 of any sized `plate 10 is determined merely by the overall width of said plate. For small plates, such as shown in Figure 5, the right edge of the said plate 10 does not extend over to the righ-t end of the rolls, and the extreme ends of the co-rrugations 59, in such quired to produceeither larger or smaller platesk for the different sized stove pipe elbows.

l claim as my invention:

l. A corrugating machine comprising a pair of cooperating corrugating rolls each having a plurality of integral, 'longitudinal corrugations formed on its periphery and also having a4 plurality of longitudinal recesses having obliquely formed buttons; and a plurality of longitudinal corrugated. bars adapted to be disposed Within said recesses.

2. A corrugating machine comprising a pair of co-operating corrugating rolls each having a plurality of integral, longitudinal corrugations formed ou its periphery and also having a plurality of longitudinal recesses having obliquely formed bottoms, said bottoms being dis-posed at equal angles relatively to a radius drawn through each of the saine; and a plurality of longitudinal corrugated bars: adapted to be disposed Within said recesses.

3. A corrugating machine comprisinga pair Lesage?? of co-operating corrugatingrolls eachhaving an integral longitudinal corrugation and an offset corrugation and also having a longitudinal recess and a loca-ting shelf disposed longitudinally in line With each other; acorrugated bar adapted to be `disposed in said longitudinal recess; and an offset corrugated block adapted to be dis-poised upon said loeatin shelf.

4. corrugating machine comprising an upper corrugating roll having longitudinal corrugations and inwardly oilfset corrugations located at one end of said longitudinal corrugations; a corrugated bar arranged adjacent to said longitudinal corrugations of said upper roll; an inwardly oil'set corrugated hlock arranged adjacent to the said` in- Wardly offset corrugations oi' said upper roll; a lower corrugating roll having longitudinal corrugations and outwardly oiiset corrugations; a corrugated har arranged upon said lower roll; and an outwardly oii'- set block arranged upon said lower roll.

BRQR J. LINDGREN.

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