US965018A

US965018A - Plate-bending apparatus.

Info

Publication number: US965018A
Application number: US53196509A
Authority: US
Inventors: Augustus M Saunders
Original assignee: National Tube Co
Current assignee: National Tube Co
Priority date: 1909-12-08
Filing date: 1909-12-08
Publication date: 1910-07-19
Anticipated expiration: 1927-07-19

Description

A. M. SAUNDERS. PLATE BENDING APPARATUS.

APPLIOATION FILED DEC. 8, 1909.

Patented July 19, 1910.

2 SHEETS-$111531 1.

IVENTOR Q11Lmm Patented July 19, 1910.

2 SHEETS-SHEET 2.

wwwgsmzs WCLWM UNITED STATES PATENT OFFICE.

AUGUSTUS M. SAUNDERS, OF MCKEESPORT PENNSYLVANIA, ASSIGNOR 'I'O NATIONAL TUBE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF NEW JERSEY.

PLATE-BEN DING Al?PAIL-EATUS.

Applioation filed December 8, 1909. Serial No. 531,965

To all whom it may concern:

Be it known that I, AUGUSTUS M. SAUN- DERS, of McKeesport, Allegheny county, and State of Pennsylvania, have invented a new and useful Improvement in Plate-Bending Apparatus, of which the following is a full, clear, and. exact description, reference being had to the accompanying drawings, forming part of this specification, in Which- Figure 1 is a longitudinal side elevation showing the overhead traveling ram as constructed and applied for use in'connection with power bending rolls-in accordance with my invention. Fig. 2 is a sectional end elevation of the same on the line 11- 11 of Fig. 1.

in being made into pipes or tubes. Hereto- My invention relates to apparatus used in connection with power bending rolls for bending metal plates into cylindrical form which are afterward reheated and welded fore with the apparatus used in bending such plates, after the plates have been bent by means of the bending rolls, the adjacent longitudinal edges of the plates at the ends of the curved plates must be hammered into proper shape with sledges by manuallabor, which is a slow and expensive operation.

The object of this invention is to provide improved means by which such plates are given a cylindrical form and the edges of the bent plate are made of uniform and with a proper amount of lap along the entire length of the bent plate.

In the drawings 2-2 re resent the two bottom'and 3 the top roll 0 a set of power bending rolls, mounted in suitable bearings on the shoes 4 and driven through the spur gears 5 by means of an. suitable type of motor which-is operative y connected to the driving shaft 6.

Located above the

bending rolls

2, 3 and extending lengthwise of these rolls is a runway track formed by the girders 7 which are secured to the columns 7 of'the runway structure and mounted upon the track formed by the irders 7 is a traveling ram forming part 0% my invention which is arranged to travel lengthwise from end to end The rain as shown consists of two parallel rollers 8 mounted in bearings 9 secured on the ends of the crosshead 10, and connected by one end to this cross-head is a piston rod 11 having on its opposite end a piston which is-operatively which i mounted in the fluid pressure cylinder 12, so as to move the cross-head l0 and rollers 8 1iiertically relative to the power bending ro s.

The fluidpressure cylinder 12 is provided with wings 13 forming supports'which pro ject into therecessed slides on the track girders so as to' permit of longitudinal movement of the ram while preventing its being lifted from its track when being used to reinforce and prevent bendin'groll 3 at the beginnin of the plate bending operation, or in bending the longitudinal edges of the plate into engagement in completing the plate bending operations. -.-The cross-head 10 is also provided with guide rods 14 which operate through suitable guides forming part of the cylinder 12 and cushioning means formed by springs 15 on the rods 16 are provided to lessen the shock of the upward stroke of the cross head when being lifted in operating the apparatus.

The cylinder 12 of the traveling ram is connected by means of a flexible connection 17 with the slow down gearing 18 to a driving motor 19 by which the ram is caused to travel lengthwise on its ways in bringing the ram in engagement with the entire length of the plate being bent. As shown in the drawings, one end of the connection 17 is and the idler sheave wheel 21 on the opposite end of the runway, has its other end connected to the opposite side of the cylinder 12. The cylinder 12 is double acting and fluid pressure is supplied to one end through walking pipes 22 which are connected'by the pipe 23 with a suitable source of fluid pressure, the opposite end of the cylinder 12 also being connected by the pipe '24:" and walking pipes 25 with a source of fluid pressure supply.

In the operation of my improved apparatus, the plate to be bent into cylindrical form is heated to the proper temperature and is then placed between the power bending rolls from one side at the proper angle. The ram referably in the position upon the runway s own in full lines in Fig. 1 is then lowered by means of the fluid pressure cylinder 12, until the rollers 8 are in engagement with the bending roll 3 so as to form a support for and prevent springing of this roll 3 during the plate forming operation. As soon as the plate has passed through the rolls 2?. and 23 sufficiently to come into proximity to or strike the rollers 8 or the side of the cross-head 10, the ram is lifted by means of the power Cylinder 12 until the rollers 8 are above the plate bein bent. The bending rolls are then rotate and the plate is passed farther between the bending rolls and the ram is again caused to descend until the rollers 8; are in contact with the outer surface of the plate being bent, when the rotation of the bending rolls and necessarily the plate is continued. This operation causes one edge of the plate to be forced downwardly into engagement with the adjacent longitudinal edge of the plate as shownat A in Fig. 1. The plate is then caused to rotate backwardly and -forwardly be-tween'the bending rolls, this operation giving the plate a substantially cylindrical form opposite the rollers 8. The travelin ram after being raised is then moved longltudinally or in the direction of the axes of the bending rolls and is again caused to descend. .The .rolls are then rotated until the rollers 8 have pressed the high edge portionsB and, in.

othersimilar operations the high edge pen tion C is pressed downwardly until in en-- gagement with the opposite longitudinal edge portion of the plate bei bent. The plate is also moved backwa-r ly and forwardly between the bending rolls by rotating these rollsand is caused to assume 9. cy-

lindrical form opposite the high points B and C. In this way the bent plate is formed to the desired curvature throughout its entire length and the lap is made uniform throughout its length. This is of particu lar va us in making the larger sizes of pipes and in making extra length pipes. The bent plate is then removed endwise from the bending rolls when the apparatus is in readiness to again perform the bending operations as described.

The advantages of my invention are many and will be appreciated by those skilled in the. art.

By its use the plates are bent to the desired curvature and the opposite longitudinal edges of the plates are brought into the desired close contact and with the desired amount of la without difficulty, and the number of de ective pipes or tubes made in the later welding operations is thereby greatly reduced. The ram is ada ted to operate all points in the length 0 the pipes being used and in engaging with the top bending roll 3 during the be inning of the plate bending operation rein orces and prevents any spring in the top bending roll and greatly increases the efiiciency of the bendmg rolls. The apparatus is simple and is easily kept in re an.

Modifications 1n the construction and aredges of the a track for said carrier, and means for movrangement of the parts may be made without departing from my invention. The plates may be heated or not as is desired. The means employed for actuating the rain on its track as well as into and out of its operative position may be modified and other 'chaiwes may be made.

I c aim:

1. Apparatus for bending metal plates, comprising bending rolls, a ram movable toe ward and away from said rolls, a carrier on which the ram is movably mounted, a track for the carrier and means for moving the carrier on said track; substantially as described.

2-. Apparatus for bending metal plates, comprising bending rolls, an overhead ram movable toward and away from said rolls, a carrier on which said ram is mounted, a track for the carrier, and means for moving the carrier on said track; substantially as described.

3. Apparatus for bending metal plates, comprising bending rolls, a carrier having a movable ram mounted thereon adapted to engage with and bend the marginal side plates held between said rolls,

ing the carrier on the track; substantially as described.

4. Apparatus for bending metal plates, comprising bending rolls, an overhead carrier having a vertically movable ram mounted thereon adapted to en age with and bend the marginal side edges 0% the plates held between said rolls, a track for said carrier, and means for movin the carrier on said track; substantially as 'escribed.

5. Apparatus for bendin metal plates comprising plate bending rolls, an overhea carrier having a vertically movable plate .b'ending ram mounted thereon, means for moving said ram on the carrier into engagement with a plate held between the rolls, a track for the carrier, and means for. moving the carrier on said track; substantially as described.

6. In apparatus for bending metal plates, the combination with bendin rolls of an overhead track extending len hwise of said rolls, a carrier on said two a vertically movable plate bending ram on the carrier, means for moving the carrier on the track, and means for moving the ram on the carrier into en agement with a plate held be tween the r0 ls; substantially as described.

7. In apparatus for bending metal plates, the combination with bending rolls of a track extending lengthwise of said rolls, a carrier on the track, a ram movable toward and away from the rolls mounted on said carrier, means for moving the ram on the carrier, and means for moving the carrier on the track; substantially as described.

8. Apparatus for bending plates, comprising bending rolls, an overhead track above sa1d bending rolls, a fluid pressure cylinder movablymounted on said track, means for movin said cylinder on the track, and a vertica ly movable ram operativel connected to said cylinder and arrange to move toward and away from said bending rolls; substantially as described.

9. Apparatus for bending metal plates comprising bending rolls, a ram above said rolls, means for moving the ram toward and away from the rolls and means for movin said ram in the direction of the length 0 said rolls; substantiall as described.

10. Apparatus for ending metal plates.

comprism bending rolls, a movable ram above sai rolls, a carrier for the ram and means for moving the carrier and ram in the direction of the length of said rolls; substantially as described.

11. Apparatus for bending metal plates comprising bending rolls, a ram, means for moving the ram lengthwise of said rolls, and means for moving said ram into and out of engagement with plates being bent by the re s in different ositions relative to the len h of said roils; substantially as descri ed. a

12. Apparatus for bending metal plates comprising bending rolls, a ram movable toward and away from said rolls, means for moving said ram lengthwise of the rolls, and means for moving said ram into and out of en agement with plates being bent by the rol 5, said ram having a plurality of antifriction rollers mounted thereon and adapted to contact with the plates being bent; substantially as described.

In testimony whereof, I have hereunto set my hand.

AUGUSTUS M. SAUNDERS. Witnesses: Y

C. H. STARR, -JAs. P. DAvxs.