US1332354A

US1332354A - Sheet-metal-working machine

Info

Publication number: US1332354A
Application number: US235613A
Authority: US
Inventors: Oscar P Nystrom
Original assignee: HOLLAND FURNACE CO
Current assignee: HOLLAND FURNACE CO
Priority date: 1918-05-20
Filing date: 1918-05-20
Publication date: 1920-03-02
Anticipated expiration: 1937-03-02

Description

0. 'P. NYSTROIVI.

SHEET METAL WORKING MACHINE.

APPLICATION FILED MAY 20, |918.

v Patented Mar. 2, 1920.

1332354 4 sHEETs-sHEETI z 33 E lm J 0 f I 0. P. NYSTROM. SHEETNIETAL WORKING MACHINE. APPLICATION FILED MAY 20, 1918.`

Patented Mar. 2, 1920.

4 SHEETS-SHEET 2.

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@Seg/f HAM/572cm lL-QL# f. e i2 0. P. NYSTROM.

SHEET'METAL WORKING MAcHlNE.

APPLICATlON FIL'ED MAYZO., 1918.

1,332,354. Patented Mar. 2, 1920.

4 SHEETS-SHEET 3.

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SHEET METAL WORKING MACHINE.

APPLLcATxoN FILED MAY2o,191e.

STATES PATENT OFFIC.

. OSCAR P. NYSTROM, OF HOLLAND, IJLICIIIGAN, ASSIGNOR TO" HOLLAND FURNACE COMPANY, OF HOLLAND, MICHIGANi A CORPORATION OF MICHIGAN.

SHEET-METAL-WORKEMG MACHINE.

Speccaton of LettersPatent.

Patented Mar. 2, 1920.

Application led May 20, 1918. Serial No. 235,613.

To all whom #may concern:

Be it known that I, OSCAR P. NYs'rRoi/r, a citizen ofthe United States of America, residing at Holland, in the county of 0ttawa and State of Michigan, have invented certain new and useful Improvements in Sheet-llietalWorking Machines; 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 appertains to. make and use the same.

This: invention relates to a machine for working and forming sheet metal, particularly various sections of metal which go to makeup an elbow or a similar construction in smoke pipes of furnaces or other heating constructions', the invention being also adapted for making elbows in various types of pipesv other than that mentioned, particularly the' hot air pipes leading from a furnace to various rooms in a; building heated by the same. It is a primary object and purpose of the present invention to provide; a machine with which various continuous grooves and ridges may be formed at the ends of sections. so that the, same may be fitted. and secured together to form an el-` bow, the invention consisting in many novel features; ofv construction and arrangement of' parts for eectively accomplishing the end desired.

For an understandingl of the invention and the mechanism embodying the same, reference may be had to the accompanying drawings5 in which,

Figure L i's a side,` elevation, partly' in section, ofy a sheet` metal working machine embodying my invention.

Fig. 2l is a plan View of the rotar f d1e carryingy member.

Fig. 3 is a vertical section therethrough andv adjacent: parts of a relatively stationary die member and' support cooperating with the dies carried by the. rotary member.

Fig. 4 is a side elevation of the Uconstruction shown in Fig. 2. l n

Fig. 5 is a fragmentary section, similar to that shown in Fig; 3, and illustrating a slight' modification in the dies.

Fig. 6 isV a horizontal sectiontaken substantially on the lined- 6 of Fig. l.l

Fig. 7 is a side elevatipn, partly 'in sec tion, of an elbow the sections of whichl are formedkon the machine.

- Fig. 8 is a plan View of the frame of the machine, the rotary die` member being removed.

Fig. 9i is a vertical section substantially on the line 9--9 of Fig. 8.

Fig. 10y is a front view of the upper portion of the frame of the machine, and

Fig. 11 is a fragmentary side elevation, partly vin section, of the mechanism for bringing the various dies together in operative position during the operation of the machine.

Like reference characters refer tov like parts in the different views ofthe drawings.l

Iny construction a relatively stationary table 1` is supported by a plurality of vertical supports 2, preferably, of tubular form, the same being connected andl braced between their upper and lower ends by a cross membery 3. The table l has a central opening through which a boss l projects in and through which a Vertical shaft 5 is mounted, being slidable vertically throughthe boss but keyed thereto so that the boss rotates with the shaft. The lower end of the shaft extends a short. distance below the member 3 and has pivotal connection to a lever 6. which is pivotally mounted at 3? to and below the member 3. Its front end extends in front of the forward supports 2 and isi formed with` a foot-engaging portion 7, while its rear end carries a weight 8', the normal tendencyv of which is to elevate the shaft 5 to;4 uppery position. The shaft: eX- tends through a vertical; spacing member 9 connected to and extending above the mem ber 3, above which a pulley 10 is connected with the sha-ft 5, the same being adapted to. be driven` byV an endless. belt 11 passing overy any suitable driving pulley 122 onr a drive shaft 13. The belt is guided aroundv idle guide pulleys` llwhich are mounted on suitablev brackets l5 connected to they rearv vertical supports 2, it being; evident that the shaft 5 rotates continuously whenever the drive shaft 13 is in operation, the connection of the lower end of the'shaft 5 tothe lever 6 bein,fr one suitableto permit such rotation, as shown in Fig.

Above the table li at the rear portionthereof a die member 16` is fixed,` covering substantially the rear half of the table-1, in front ofwhich atzeach-f side edge ofl thetable i guides 17` are located between which a movable die member 18 is slidably mounted. Coil springs 19 are interposed between the

members

16 and 18, the tendency of which is to force the member 18 toward the front and away from the rear member 16. A head 20 having an inclined rear face 21 passes through an opening in the member 18,hav ing a coperating inclined face as shown in Fig. 9, the lower end of the head being connected to the upper end of a rod 22 which at its lower end has pivotal connection to a lever 23 pivotally mounted between its ends on the member 3 as shown in Fig. 11. A link 24 pivotally connects at its upper end to the rear end of lever 23, and at its lower end to the upper end of a second lever 25,

also pivotally mounted at a point between its ends'on the member 3, while a second link 26 connects the rear end of the lever 25 with the foot-operated, lever 6. It is evident that upon depression of the front end of the lever 6 by the foot of the operator of the machine, the die member 18 is moved to the rear against the resistance of springs 19 bringing the adjacent edges of the

members

16 and 18 together. As soon as the pressure of the foot upon the front end of lever 6 is removed, springs 19 move the member 18 to its normal position, the head 20 being elevated not only by the action of the weight 8,

but also by a coil spring 27 disposed under the front end of the lever 23. This coil spring 27, however, is not absolutely essential and may be eliminated if desired.

A circular recess 28 is cut in the upper side of the table 1 and the

members

16 and 18 around this recess are cut away in semicircular form as shown. In the edges of the simicircular portions of the

members

16 and 18 dies are cut in the form of upper and lower grooves 29 as shown in Fig. 3. There may be one or more of these grooves, and in Fig. 5 I have shown a modification in which only one groove 29a is formed in the member 18a, similar to member 18, and of course the coperating member 16 would likewise have one groove only.

A circular die-carrying member 30 seats in the recess 28 and is connected to the boss 4 to rotate therewith. In diametrically opposed sides thereof recesses are cut, over which retaining plates 31, one at each side of each recess, are secured to hold a sliding construction underneath, such construction comprising upper and lower

connected plates

32 and 33 between which at their outer ends circular dies 34 are rotatably mounted, the same being formed with ridges to coperate with the grooves 29 in the

die members

16 and 18. In the modification shown in Fig. 5 the die 34a has "one ridge only to coperate with the single groove 29,-

A rod 35 is attached to each of the sliding constructions, extending inwardly therefrom and terminating in a head 36. A coil spring 37 surrounds each rod 35 and is under compression, the tendency thereof being to draw the dies 34 away from the

members

16 and 18 and force the heads 36 into grooves 38 cut in opposed sides of the shaft 5. It is evident, however, that on downward operation of the foot lever 6 and the consequent movement of the shaft 5 in a downward direction, the upwardly and outwardly inclined sides of the grooves 38 serve to force heads 36 and attached rods 35 in an outward direction, thereby carrying the dies 34 outwardly and into coperation with the grooves 29. The downward movement of the shaft 5 is limited by a collar 39 secured at the upper end of the shaft as shown.

In operation a section, such as 40, of plain sheet metal, for a pipe elbow is placed at one end between dies 34a and the cooperating groove members 16 and 18a, after which a depression of the foot lever 6 is made forcing the dies 34a against the metal and causing it to enter the grooves 29a, this making a single bead on the sections 40 as indicated at 40a. Other sections such as that indicated at 41 are disposed in a similar mechanism between the dies 34 andthe

coperating groove members

16 and 18 whereby, on depression of the f oot lever, a double bead indicated at 412L is made. The beaded ends of the

sections

40 and 41 may then be fitted together and by another? operation, which forms no part of the present invention, rmly secured together. It will be noted that on depression of the foot lever, the member 18 is moved over toward the part 16 and with the rotation of the diecarrying member 30, a smooth and continuous bead or double bead may be made on the

section

40 or 41, and that as soon as the foot lever 6 is released and member 18 permitted to take its normal position, the beaded section is free to be taken from the mechanism. In fact, with thin sheet metal there is no necessity to use a movable member 18, but the grooves 29 0r 29F-Vmay be cut in a solid member which may be made by connecting the

parts

16 and 18 together. But with heavier metals for heavier pipes, the movable die member 18 is advisable if not absolutely essential. Each

section

40 or 41 is inserted between the die-carrying member and the

grooved die members

16 and 18 and is left in momentarily while the foot lever is depressed, the beads in the metal sections bei formed very rapidly, after which it is removed, permitting another section to be acted upon. Y

The construction described is very eiiicient for properly forming sheet metal sections, which may later be connected together to make pipe elbows for furnace or smoke pipes, and with which, production may be very greatly facilitated. In practical operation the mechanism has proven completely satisfactory. The mechanism is relatively simple but is very efficient for attainment of the desired ends.

I claim:

l. In combination, a support, a die member mounted on and above the support and provided with a circular opening in the sides of which a grooved die is formed, a rotary die mem'ber located in the opening in said first die member, a rotating die mounted to move radially on said rotary die member, a vertical shaft on which the rotary die member is splined, said shaft having a groove formed with an upwardly and outwardly inclined side, a headed pin connected with the radially movable die, said head entering the groove in the shaft, means to normally hold said head in the groove, means to drive the shaft, and means t0y depress the shaft thereby forcing the radially movable die outwardly to coperate with the first mentioned die, substantially as described.

2. In combination, a supporting frame, a vertically positioned shaft rotatably mounted on the frame, a lever pivotally mounted on the lower portion of the frame to which the lower end of the shaft is conneeted, means tending to elevate the front end of the lever and to thereby raise the shaft to upper position, a circular die carrying member splined on the shaft, a roller die movably mounted on said member for radial movements, means whereby on downward movement to the front end of the lever and consequent downward movement of the shaft, the roller die is moved outwardly, a coperating die member surrounding the circular die carrying member and formed with a die to coperate with the roller die when it is projected outwardly, and means to drive the shaft, substantially as described.

3. In combination, a circular member, a slide positioned radially thereon, a roller die mounted at the end of the slide, means normally moving the slide and die inwardly, means to rotate said member, a second stationary member partially surrounding the circular member and provided with a cooperating die at its edge adjacent the circular member, a third member mounted to move toward or away from the other members, said third member completing the surrounding of the circular member and also having a coperating die formed at its adj acent edge, springs normally moving the third member away from the other members, a. foot operated lever, means disposed between the lever and the third member for moving said third member toward the other members on operation of the lever, and means disposed between said lever and the slide to Project the slide and roller die outwardly on operation of the lever, substantially as described.

In testimony whereof I aifix my signature.

OSCAR P. NYSTROM.