US1524946A

US1524946A - Bead-forming machine

Info

Publication number: US1524946A
Application number: US625837A
Authority: US
Inventors: Oscar P Nystrom
Original assignee: HOLLAND FURNACE CO
Current assignee: HOLLAND FURNACE CO
Priority date: 1923-03-17
Filing date: 1923-03-17
Publication date: 1925-02-03
Anticipated expiration: 1942-02-03

Description

Feb. 3, 1925. 1,524,946

0. P. NYSTROM BEAD FORMING MACHINE glad March 17, 1925 4 Sheets-Sheet l M OsoarPNgsfiom 13 wgW K Feb. 3, 1925. 1,524,946

0. P. NYSTROM BEAD FORMING MACHINE Filed March 1'7, 1923 4 Sheets$heet z E66 I q a r A 1/ I /C I AM 3 l2 15 fig-l B OscavRNg it m (wforncg Feb. 3, 1925. 1,524,946

0. P. NYSTROM BEAD FORMING MACH INE Filed March 17, 1923 4 Sheets$heet 3 lnuemor OseowPN sfrom.

Feb. 3, R925.

0. P. NYSTROM BEAD FORMING MACHINE 4 Sheets-Sheet 4 Filed March 17, 1923 InueMor J B OsoarPN sr fim Patented Feb. 3, 1925.

UNITED STATES.

PATENT OFFICE.

OSCAR P. NYSTROM, OF HOLLAND, MICHIGAN, ASSIGNO'R TO HOLLAND FURNACE COM- PANY, OF HOLLAND, MICHIGAN, A CORPORATION OF MICHIGAN.

IBEAD-FORMING MACHINE.

Application filed March 17, 1923. Serial No. 625,837.

To all whom it may concem:

Be it known that I, OSCAR P. NYSTROM, a citizen of the United States of America, residing at Holland in the county of Ottawa and State 0 Michigan, have invented certain new and useful Improvements in Bead-Forming 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 pipe beading machine, being of use particularly in beading the ends of elbow sections of pipe such as are used in smoke pipes and hot air pipes in furnaces. The different sections which are used in making an elbow are formed on this machine at their ends with outwardly pressed and continuous beads adapted to interlock with similar beads on the adjacent sections in making up the elbow, whereby an elbow is'made with the parts or sections thereof securely fastened together. It is a primary object and purpose of the present invention to make a machine in which the pipe or elbow sections may be beaded very rapidly, the mechanism being practically automatic in action after it is brought into action by operating a foot pedal, no operations by the operator of the machine being required other than putting the plain sections in the machine and taking them out after the heads have been formed. The machine has many novel constructive features and arrangements of parts for effectively attaining the ends outlined, as will be apparent as understanding of the invention is had from the following description, taken in connection with the accompanying drawings, in which,

igure 1 is a front elevation of the bead forming machine.

Fig. 2 is a fragmentary vertical section taken substantially on the plane of line 2-2, of Fig. 4.

Fig. 3 is a centralv vertical section through the machine, the plane of the section being from the front to the rear of the machine.

Fig. 4: is a plan view of the machine.

Fig. 5 is a vertical section showing a fragmentary portion of the machine, the section being on the line 5-5, of Fig. 4. 5

' the shaft.

Fig. 6 is a fragmentary vertical section enlarged through the upper portion of the machine, and on the plane of line 66, 01 Fig. 4.

Fig. 7 is a view similar to Fig. 6 but with the partsin a different position or that which they take in the bead forming operation, and

Fig. 8 is a plan with parts broken away and shown in section showing the roller die carrying head and the manner of mounting the roller carrying slides thereon.

Like reference characters refer to like parts in the different figures of the drawings.

In the construction of the machine a support is provided comprising vertical posts 1 at the corners of the machine, those at each side of the machine being integrally connected by a cross member 2 (see Fig. 3). These posts extend downwardly from the top of the machine for a distance and below the lower ends of the same, the machine is supported by a plurality of legs 3, a table 4 being interposed between the posts 1 at their lower ends and resting on the upper ends of the legs which are securely attached to the table. At the upper ends of the posts a top member 5 is located and secured in.

place, this completing the supporting frame structure for the machine. The side posts 1 of the supporting frame are also connected adjacent their upper ends by cross bars 2* which serve as ledges on which the sides of the top member 5 bear as shown.

A bearing sleeve 6 is formed centrally of the table 4 and a like sleeve 7 is formed with the member 5 directly above the sleeve 6. A shaft 8 is mounted vertically and passes through said sleeve, being driven through a belt around a pulley 9 splined on This pulley has a collar 10 formed at the lower end of the hub thereof, and a bracket 11 is secured to the table 4, extending upwardly to the collar and having a lip turned inwardly from the upper end of the bracket to enter the annular groove in the collar, thereby holding the drive pulley at a fixed level, the shaft 8 being mounted for longitudinal movements up and down through the pulley. A foot lever 12 is located substantially horizontally under the table 4 and is pivotally mounted at 13 at the lower end of a supporting arm 14 which depends from the table back of the shaft 8. The foot lever extends to in front of the supporting frame and at its front end is formed with a pedal head 15 for engagement by the foot of the operator. The lever is formed with an integral collar 17 between its ends, off-set to one side thereof and the lower end of the shaft 8 is reduced in size, making an end portion 8 which passes through the collar, a set collar 19 being secured on the lower end of the portion 8. A weight 16 on the rear end of the lever 12 normally holds the shaft in its upper position, but the operator of the machine by stepping on the pedal head 15 overcomes the weight and draws the shaft to a lower position, as is evident.

At the upper end of the shaft 8 and mounted within the sleeve 7 is a sleeve 20 which is splined on the shaft 81 This sleeve 20 is formed integrally with and depends from a circular head 21 which is located in an annular recess 22 formed in the upper side of the top member 5 of the supporting frame of the machine. Suitable anti-friction bearings are disposed between the lower side of the head 21 and the top member A pair of oppositely extending slides 23 are slidably mounted in the head 21 in suitable grooves 24 therein, the slides 23 being trapezoidal in cross section and the grooves 24 formed to correspond. The ends of the slides 23 project a short distance beyond the sides of the head 21 and each of the outer ends of the slides carry roller dies 26 which are mounted to turn freely on vertical axes. The slides are connected and drawn together normally by tension springs 25 (see Fig. 8) so as to normally occupy inner positions with inner ends abutting.

The inner ends of the slides at their middle portions are cut to form inclined cam surfaces 27 and recesses are also cut so that a reduced neck 28 at the upper end of the shaft 8 may pass between the slides when the same are located with inner ends in abuttin engagement. Above the neck 8, a conica portion 29 is formed for a distance, merging into a short section 30 of the same diameter as the shaft 8. A threaded boss 31 extends upwardly from the upper end of the section 30 on which a disk 32 is threaded down into engagement with the upper end of said section 30, and locked in place by a lock nut as shown. Two set screws-32 are threaded through the disk 32 at opposed sides thereof and the same are capable of adjustment whereby the distance that the shaft 8 may be moved downwardly is determined, the lower ends of the screws 32 coming into contact with the head 21 and stopping further downward movement of the shaft. As the shaft is drawn downward when the lever 12 is operated, the cone at 29 rides against the cam surfaces 27 in the slides 23, forcing said slides and the roller dies 26 thereon outwardly and in unison; and as soon as the pressure on the lever 12 is released, the weight 16 moves the shaft 8 upwardly, permitting the slides to return inwardly to normal position under the influence of the springs 25.

Above the top 5 two plates 33 are mounted, one at each side of the head 21, each having a 'semi-circular recess at its inner edge larger than the head. These plates are pivotally mounted at 34 to the top member 5 near their rear and-inner edges. In the semi-circular recessed portions of the plates, dies are secured to act in conjunction with the roller dies 26. Each plate adjacent its front edge is formed with a short vertical slot (see Fig. 5) through which -screws 37 pass, this limiting the. extent of movement of the plates which are norma'lly separated as far as the screws 37'and slots 36 will allow by a spring 38 under. compression located at the front andgzbet-weeai said plates (see Figs. 1, 4 and 5)'.'

At the front of the top member 5 afbraeket is secured included in which is a vertical sleeve 39 which extends downwardly,'and from which adjacent its upper end and at opposite sides ears 40 extend horizontally. A lever 41 is pivotally mounted between its ends at 42; between the cars 40 of each pair of ears, said levers extending above the pivots through openings in the member 5 and terminating in partially rounded heads 43 which enter openings 44 in the two plates 33.

A rod 45 has its upper end portion slidably received in the sleeve 39 and at its lower end is connected to the foot lever 12. A member 46 is permanently secured to the rod 45 directly below. the sleeve 39, the lower portion of the member 46 being tapered downwardly. to form a conical extension 47 to the lower part of said member 46. A screw 48 passes through the lower end 49 of each of the'levers 41, the ends of screws 48 coming against opposite sides of the rod 45 immediately below the cone portion 47 of member 46 when the rod 45 is in upper position, as shown in Fig. 5.- On downward operation of the foot lever 12 and downward movement of the rod 45, the inclined sides of the cone 47 ride against the ends of screws 48 whereby levers 41 are operatedso as to move the plates toward each other at the front with a compression of the spring 38. As soon as the foot lever is released, the spring 38 moves the plates 33 away from each other, separating them at their front portions as is obvious.

In the operation of the machine, as thus constructed, a section of an elbow, as shown at 50 in Figs. 4 and 6, .is placed with one edge located around the recess 22 in the member 5, the elbow section passing around the head 21 and the roller dies 26 carried thereon, and being located within the dies 35 on the plates 33. This is done with the parts of the machine in open normal position. The operator then depresses the lever 12 whereupon the plates 33 are moved inwardly so as to bring the dies 35 to the outer sides of the elbow secformed therein in the same manner.

tion 50, and the slides 23 are moved out- \vardly in opposite directions, carrying the roller dies 26 against the inner sides of the section 50, tending to press the metal into the grooves of the dies so that in a short time a bead 51 tis formed at the edge of the pipe section, as shown in Fig. 7. As soon as the foot lever 12 is released after the bead is formed, the roller dies are retracted, moving away from the bead formed, and the plates 33 with attached dies 35 move outwardly away from the bead, so that the beaded section of the elbow is free for removal from the machine. It may he removed and other sections have beTags e operation is very rapid and by using this machine-a large quantity production is had.

The construction described is very practical, useful'and in every way is efficient for the purposes for which it is designed. The automatic release of the elbow section after the head is formed is a very useful feature of the invention. .The machine has had extensive test and trial and is in every way exceptionally satisfactory. The appended claims define the invention and all forms of structure coming within their scope are to 'he considered as comprehended by the inrention.

I claim:

1. In a machine of the class described, a horizontally located flat member, two plates mounted on and above said member, each of said, plates covering substantially one halfof the member and each at its inner portion having a semi-circular recess cut therein, a grooved die attached to each plate and located. in the recess thereof, means pivotally connecting said plates to the member to turn about a vertical axis adjacent the rear and inner edges of said plates, :1 spring interposed between the' plates adjacent their front edges tending to separate them, stop means limiting the separation of the plates, a vertically mounted rod, means for moving the same downwardly, a member mounted on the rod having a conical extension at its lower end, two levers pivotally mounted, one at each side of the rod, the upper portions of said levers extending through openings in said first member and said plates, screws threaded through the lower ends of the levers toward the rod and the member and plate, a foot lever pivotally mounted between its ends on and below the plate, connections between the lever and the lower end of the shaft, a weight on the lever tending to hold the shaft in an upper position, a head splined on the upper end of the shaft. and located above said member, two slides slidably mounted for horizontal sliding movement on the head, one at each side of the shaft, spring means normally drawing the slides toward each other, roller dies mounted. to turn on vertical. axes, one at the outer end of each slide, a reduced neck on the shaft where it passes between the slides and an enlargement above the neck having a conical lower portion for moving the slides outwardly on downward movement of the shaft, two plates located on and above the said member, one at each side of the head, each having a semicircular recess in its inner side, means pivotally connecting the plates to the member adjacent the rear and inner ed es of the plates, a spring between the pfiites adjacent their front edges and tending to separate said plates, semi-circular dies carried by said plates in the recesses therein, a-vertical rod connected at its lower end to the foot lever and movable downwardly with the down-" ward movement of the shaft, a conical member fixed on the rod, two levers pivotally mounted between their ends on the support,

through the lower ends of the levers, the

inner ends thereof be'ing'adapted to bear against opposite sides of the rod and against opposite'sides of the conical member when the rod is moved to lower position, substantially as and for the purposes described.

In testimony whereof I aflix my signature.

' OSCAR NYSTROM.