US252741A - Machine for bending and punching arch-bars - Google Patents

Description

2 SheetsSheet 1.

(No Model.)

G. G. CROSS. MACHINE FOR BENDING AND-PUNGHING ARCH BARS. No, 252,741. Patented-Jan. 24,1882.

(No Model.)

2 Sheets-Sheet 2.

G. G. GROSS.

MACHINE FOR BENVDING AND PUNOHING ARGHBARS.

Patented Jan. 24,18 82.

N. PETERS. PllnkrLillmgl-Apller. WJshilmluvl. n. c

' UNITE STATES PATENT @rrrcn,

CHRISTOPHER e. cnoss, or CHICAGO, ASSIGNOR TO WILLlAh'lS, WHITE &

00., on MOLINE, ILLINOIS.

MACHINE F( )R BENDING AND PUNCHING ARCH-BARS.

SPECIFICATION forming part of Letters Patent No. 252,741, dated January 24, 1882.

Application filed August 15, 1881. (No model.)

T (d l whom it may concern:

Be itknown that I, CHRISTOPHER G. (Jaoss, residing in Chicago, in the county of Cook and State of Illinois, and a citizen of the United States, have invented new and useful Improvements in Dies or Formers for Making Arch- Bars, of which the following is a full description, reference being had to the accompanying drawings, in which- IO Figure 1 is a side elevation. Fig. 2 is atop or plan view; Fig. 3, a detail, being an under side view of the female die or former, one end being broken 011'; Figs. 4 and 5, details showing the punch.

I5 This invention relates to thcmaking or forming of arch-bars,and to that class of such bars which are used in the construction ofcar-trucks; but it can also be applied to the manufacture .of similar bars for use in other places and for other purposes in which it is desirable or necessary to use arch-bars having straight center, diagonal or oblique sides, and straight ends.

The object of the invention is to make or form such bars readily, easily, and quickly 2 5 without the use of hand-labor, except to the extent required in placing the bars in position to be formed into shape and to remove them when formed, and have the operation of making or forming the arches complete, so that when the bars are removed from the devices by which they are made and formed into shape they will be in condition for immediate use, so far as their shape and construction are concerned, and will all have a uniform and corre- 5 sponding shape; and its nature consists in providing dies or formersone male and one femalehavingsupporting-plates, as hereinafter set forth, and also having coacting faces of the desired configuration to present a straight cen- 0 ter face, diagonal or oblique side faces, and straight end faces, between which the bars will be given a corresponding shape by the action of the dies or formers when brought together under pressure; and in providing the female 5 die with dovetail grooves located in the straight center and end faces to receive and retain punches,and providing the maledie at its center and ends with holes or openings which coincide with the punches, for forming holes at the required points in the arch-bars without removing the bars from the dies or formers, both dies having supporting and strengthening plates, as hereinafter more fully described.

In the drawings, A represents the male die or former; A, the base or supporting plate for the male die or former; A, the backing or strengtheningplate for the male die or former; B, the female die or former; B, the base or supporting plate for the female die or former; B, the backing or strengthening plate for the female die or former; O, the screws for adjusting the male die or former and holding it in position, when adjusted, against pressure of the female die or former; G, the heads having screw-threaded openings for the passage of the screws 0; D, the bed or frame on which the dies or formers are located and supported; E, the movable head or pressure plate by which the female dieor former is moved or operated F, the pitmen for operating the head E; Gr, the disks or wheels for operating the pitmen; a a a, the acting faces of the male die or former; b b b, the acting faces of the female die or former; 0, the punch block orhead c, the dovetail grooves or openings for the recep- 7 5 tion of the punch blocks or heads; 0, the punches; d, the flange or guide by which the head E is held in position on the bed or frame D; e, the connection of the head E with the pitmen F; f, the wrist-pin for attachment of the pitmen to the wheels or disks G.

The male die or former A and female die or former B are to be made from steel or other suitable material which can be subjected to a severe pressure and not bend or'break, and they may be cast or otherwise formed into shape, so that the male die or former will present a working-face having a straight center port-ion, a, diagonal or oblique portion a, and

straight end portion a, while the female die 0 or former will have corresponding coactingfaces, I) I) b, b coinciding with and corresponding to (1,1) coinciding with and corresponding to a, and b coInciding with and corresponding to a. These dies or formers each 5 have a base or supporting plate and a backing or strengthening plate, A A being such plates for the die or formerA, B B being such plates for the die or former B. The plate A forms a support on which the bar to be operated on I00 can be laid, and the plate B forms a guard or guide to keep such bar in position while being pressed or formed into shape, and these plates, with their respective dies or formers, can be cast or otherwise formed from a single piece, and, if desired, strengthening rods or flanges, extending from the centerof the die or former A to the back plate A, and from the ends of the die or former B to the back plate B, can be provided,to furnish additional strength and resist the pressure of the dies or formers. The straight center faces, a b, are of the required length for the center of the arch, and the diagonal or oblique faces a I) are of the required length and stand at the desired angle for the length and angle for the diagonal or oblique portions of the arch, and the end faces, a b, are of the desired length for the length of ends of the arch, so that the desired form of arch will be produced by the action of these faces when brought together with the bar between them.

The die or former A is adjusted on the frame .or bed, on which it is mounted or supported,

as sh0\vn,by set-screws G, the shanks of which pass through screw-threaded o 'ienings in heads 0, one on each side of the frame or bed, as shown in Fig. 2, the end of the screws coming in contact with the back plate, A, so that by turning the screws the die or former A can be adjusted to properly coact with the die or former B; but other means may be provided for obtaining this adjustment of the die or former A.

The die or former B has its back plate abutting against the face of the head or push plate E, and is to be connected with such plate in any suitable manner, so that it will be advanced and receded by the movements of the head or plate, and the head or plate E is given a reciprocating movement through the medium of pitmen or connecting-bars F, one on each side, which bars are operated by crank wheels or disks G, the pitmen being attached to the disks or wheels by wrist-pins f and to the htad E by pins or pivots c. The wheels or disks G are to be revolved by means of suitable shafts, gears, and pulleys; but, as such devices may be of any of the usual and ordinary forms of construction and arrangement for imparting a pressure movement through the wheels or disks, they need not be specifically described.

The bed or frame D may be of any suitable form of construction that will furnish a support for the dies or formers, the head, and the devices for operating the head. As shown, it is provided on its exterior face and upper edge with a spline or flange, d, by which the head E is held in place, the spline entering suitable recesses or grooves in the head.

Other forms of devices for operating the head or pressure plateE may be used, and other forms of presses than that shown may be provided, so long as the devices and press will act to give the required amount of pressure to form the bar into shape between the dies or formers.

In the central straight portion and in the ends of the female die are formed dovetail grooves c, which grooves extend through the plate B, and in these grooves are slipped a cor responding dovetail-shaped block or head, a, on which is a punch, c, of the required size to punch an o ening of the size required at the center and ends of the arch; and at the center and ends of the male die or former, in line with the punch when in position on the female die or former, are holes or openings corresponding in size to the size of the punches, into which the punches will enter in punching the holes through the arch. As many punches are to be provided as the number of holes required in the arch, and the length of the head or block which carries the punches is to be somewhat greater than thelength ot' the dovetail opening into which the head enters, so that the end of the head or block will project above the face of the plate B, so as to be grasped or caught for the withdrawal of the punches.

In operation the die or former A is adjusted for the thickness of bar to be operated on, and the bar, after being heated, is placed in front of the die or former, the bar being of the required length to form, when finished, an arch of the required dimensions. The pressis then put in operation, advancing the head E, and with it the die or former B, toward the die or former A, and forcing the bar for the arch over the die or former A, and forming it into the shape which the die or former has, which shape is the one required. The die or former B is then receded by the movement of the'head or plate E, leaving the arch formed into shape on the die or former A. The punches are then slipped into the dovetail groove 0 and the die or former B again ad vanced,with the punches therein,which punches come in contact with the arch on the die or former A, and punch holes therein at the required points in the ends and center. Then the head is again receded, withdrawing the die or former B, leaving the arch on the die or former A formed, shaped, and punched, from which die it can be removed, by hand or otherwise, complete and ready for use, so far as the shaping and punching are concerned. Another hot bar is then placed on the die or former A and the operation justdescribed again repeated to form such bar into its arched shape, and these movements are continued until the required number of bars have been formed into shape and punched. By thisarrangementitwill be seen that the arches leave the dies or formers in acomplete condition, sofar as shapeand holes are concerned, and that the operation of forming them is very simple and does away with a large amount of manual labor which has heretofore been required in forming or making archbars, and that the bars will be all formed in uniform and corresponding shapes,with the holes of each bar in the same relative position, so as to coincide in use.

The length of the center and end faces and the length of the side faces and angle at which such diagonal or oblique side faces stand can be changed to suit the form of bar which it is desired that the dies or formers shall produce.

The plate B is to be provided with a suitable slot for the passage of the punch a and allow the punches to drop into the groove 0.

that I claim as new, and desire to secure by Letters Patent, is v l. The dies or formers for making arch or truck bars, consisting of a male and female die or former, each having a straight center,

down the bar While the latter is being bent,

substantially as described.

2. The dies or formers for making arch or truck bars, consisting of the male die A-and the female die B, each having a straight center, diagonal or oblique sides, and straight ends, the male die being provided with base or supporting plate A and strengthening-plate A, and the female die being provided with supporting'plate B and strcngthening plate B, substantially as described.

3. The dies or formers for making arch or truck bars, consisting of a male and female die, each having a straight center, diagonal or oblique sides, straight ends, and a supportingplate, and a back or strengthening plate, as described, the female die having dovetailed grooves to receive and hold punches, and the male die having openings for the punches to enter, between which dies the bar is bent and punched, substantially as described.

CHRISTOPHER G. GROSS. Witnesses:

ALBERT H. ADAMS, O. W. BOND.

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