US660505A - Machine for bending or curving metal. - Google Patents

Description

N0. 660,505. Patented 0ct. 23r |900.

N. mason. MACHINE FUR BENDING 0R CURVING METAL.

(Application led June 27, 1.900.) (No Model.)

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UNITED STATES PATENT OFFICE.

JACOB N. GIBSON, OF CHICAGO, ILLINOIS.

MACHIN FIOR BENDING OR CURVING METAL.

SPECIFICATION forming part of Letters Patent N o. 660,505, dated October 23, 1900.

Application filed June 27, 1900. Serial No. 21,730. iNo model.)

To all whom t may con/cern,.-

Beit known that I, JACOB N. GIBSON, a citizen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented a certain new and useful Improvement in Machines for Bending or Curviug Metal, of which the following is a specification.

It is desirable and necessary in many cases and for many purposes to employ metal rods or tubes having curves or bends therein, and it is important that the bends or curves should be similar for rods or tubes which are duplicates one of the other and used alike or for the same purpose. It is exceedingly dificult to bend rods or tubes uniformly and so that each rod or tube will correspond as to the bend or curve. This is particularly true of irregular curves or bends, so that where it is requisite to have two parts or pieces with the same conformation as to curves or bends it requires time and skill to do the work by hand, and even when partly done by machinery there is no certainty that the bending or curving will be uniform and alike in any two pieces.

The object of this invention is to construct a machine which will be simple in operation and reliable and edective in the productionV of rods or tubes having bends or curves in every respect alike or similar; and the invention consists in the features of construction and combination of parts hereinafter described, and pointed ou't in the claims.

In the drawings illustrating the invention in one form of construction, Figure l is a top or plan view with one section or division of the die or former removed, and Fig. 2 is a cross-section on line 2 of Fig. l looking in the direction of the arrow.

The mechanism or machine for carrying out my invention consists of an upper head or plate A and a lower head or plate B, each made of steel, cast-iron, or other suitable material and of the requisite dimensions and thickness for the work to be done by or on the machine. The plate or head A has in its body a circular slot a, somewhat eccentric or carried out of a true circle at one end, and the head or plate B has a corresponding and coinciding slot b, also deliected or carried out of a true circle at the same end as the slot a. The deflection or carrying out of atrue circle for both slots is at the initial or starting end of each. The plate B, which is the under plate in the construction and arrangement shown, has a side extension or continuation B, provided with holes for the passage of bolts b', by means of which the machine as a whole is attached to a support of suitable construction. Each head or plate has on its inner face one half or section of a die or former C, having a periphery conforming to the curvature of the slots o. and b, and the two halves or sections when the heads or plates are face to face constitute a complete die or former of the required curvature 011 the periphery and divided so as to be separable one from the other. Each half or section has in its outer inner corner a groove, which when the two sections or halves are together form a semicircular groove or recess c in the wall or peripheral face of the die or former as a whole, the diameter of which groove corresponds with the exterior diameter of the rod or tube which is to be curved or bent. As shown, the halves or sections of the die or former are made integral with the heads or plates; but they could be made separate and attached to the heads or plates in any suitable manner, and, if desired,the heads or plates could be formed with a central recess adapted to receive a central neck or stud on the sections or halves, thereby enabling the heads or plates to receive dies or formers of different curvatures. As shown, the sections or halves are secured together by means of lag-bolts c; but they could be secured together in any other suitable manner.

A roller D, having in its peripheral or exterior face a semicircular groove d, corresponding in size to the groove c in the die or former, is located between the heads or plates adjacent to the die or former and so arranged that the two grooves c and d form a complete circle of a diameter corresponding to the eX- terior diameter of the rods` or tube to be curved or bent.

side its journal or spindle D', which extends through the curved slots` a and b of the respective plates A and B, as shown in Fig. 2, and so that the journal or shaft of the roller The roller D has on each v will travel around in the curved slots and cause the roller to travel coincident; with the peripheral face or wall of the die or former.

A leverE, having a forked head E' to straddle the heads or plates, is pivotally mounted on the heads or plates by a pin or pivot F, and, as shown, the pin or pivot passes through the heads or plates. The pin or pivot is provided with a key f for holding it in place, so as to. be readily detached by `driving out the key and readily attached by driving in the key, and, as shown, between the key and the face of one arm of the fork or yoke is a washer f to reduce friction. Each arm of `the fork or yoke of the head has a longitudinal slot e, into which projects the end of the journal or shaft of the roller D, as shown in FigA 2, so that by swinging the lever on its pin or pivot the roller will be carried thereby around the die or former. The lever is detachably mounted on the heads or plates' so as to be removable and permit the two heads or plates to be separated when the lever is detached.

The rod or tube G, which is to have its end curved or bent, is passed through a socket or clamp g on the head or plate B in the arrangement shown, which socket or clamp is arranged so as to be in a straight line with the initial or starting end of the curved grooves a and b and in line with the groove formed by the two semicircular grooves c and d of the die or former and the bending or curving roller. Thelower plate Bis attached by its extension B and the bolts b' to a bench or support H, so as to leave the lever with a clear space for the movements thereof in a circle around the die or former.

The operation will be understood from the foregoing description, but briefly is as follows: The two halves or sections of the die or former are brought together and secured in place by the bolts c', with the grooved forming-roller between the heads or plates for its groove d to aline with the groove c of the die or former. The lever is then pivotally mounted 4on the heads or plates by its pin or pivot for its fork or yoke to straddle the heads or plates, when thejournal or shaft of the bending or curving roller can be passed through the slots of the lever and the curved slots of the heads or plates for its ends to project into the slots of the lever, assembling the parts ready for use. The rod or tube which is to have its end curved or bent is forced through the socket or clamp g for the end thereof to project the required length to form the desired curve or bend, and when inserting the rod or tube the roller CZ is to be at the point of initial start, as shown in Fig. l. The lever E is then operated to carry the roller around the die or former by the guide furnished from the curved slots, and in such travel the end of the tube will be curved or bent around the die or former into the desired shape. After the curve or bend has been made the lever can be returned to its normal position and the two sections or halves the journal or shaft of the roller travels, and

the slots in the head of the lever permit of the necessary lost motion during the swing ing movement for the roller to travel around the die or former without creating excessive friction or any binding eect that would ina terfere with its operation.

The machine as a whole is very simple'and is reliable and effective in operation, as the line of travel of the roller is controlled by the curved slots in which its' journal -or shaft passes, and as these slots conform to the shape of the die or former the result will be a curving or bending of the end of the rod or tube into the shape of the peripheral wall or face of the die or former, and this shape will be the same no matter how many rods or tubes are curved or bent, as the curving or bending is around the same die or former and under the same conditions in every case. 'lhe parts are readily assembled and easily taken apart after each operation, as with the removal of the fastening-bolts for the heads or plates and the removal of the pin or pivot for the lever and the journal or shaft for the roller the lever can be slipped off fromthe plates or heads, leaving the plates free Ato be separated one from the other for the removal of the formed rod or tube.

I claiml. In a machine for curving or bending metal, the combination of two companion heads or plates each having in its body a curved slot, a section or half of a die or former on each head or plate each section or half having a peripheral face or wall of a curvature conforming to thecurvature of the slots in the heads or plates, a forming-roller traveling around the peripheral face or wall of the die or former and having its journal or shaft ends projected linto the slots of the heads or plates and means for forcing the roller to travel around the peripheral face or wall of the die or formerand guided in its travel by the curved slots of the heads or plates and its journal or shaft, substantially as described.

2. In a machine for curving or bending metal rods or tubes, the combination of two companion heads or plates each having in -its body a curved slot, a section or half of a die or former on each head or plate, each section or half having a peripheral face or wall conforming to the curvature of the slots in the IOO TIO

heads or plates and each section or half having in its peripheral corner a groove or recess, the two grooves or recesses forming a semicircular groove of a diameter corresponding to the diameter of the rod or tube, a formingroller traveling around the peripheral face or Wall of the die or former having its journal or shaft ends Aprojected into the slots of the heads or plates and having in its body a semicircular groove or recess corresponding to and coinciding With the semicircular groove or recess of the die or former, and means for forcing the roller to travel around the peripheral face or Wall of the die or former and guided in its travel by the curved slots of the heads or plates and its journal or shaft, substantially as described.

3. In a machine for curving or bending metal rods or tubes, the combination of two companion heads or plates each having in its body a curved slot With its initial or starting end outwardly deflected, a section or half of a die or former on each head or plate, each section or half having a peripheral face or Wall conforming to the curvature of the slots in the heads or plates with its initial or starting end in alinement with the outwardly-deflected ends of the slots and each section or half having in its peripheral corner a groove or recess, the two grooves or recesses forming a semicircular groove or recess of a d-iameter corresponding to the diameter of the rod or tube, a forming-roller traveling around the peripheral face or Wall of the die or former and having its journal or shaft ends projected into the slots of the heads or plates and having in its body a semicircular groove or recess corresponding torand coinciding with the semicircular grooves or recesses of the die or former and a lever engaging the projected ends of the roller journal or shaft for forcing the roller to travel around the peripheral face or Wall of the die or former and guided in its travel by the curved slots of the heads or plates and its journal or shaft, substantially as described.

4. In a machine for curving or bending metal rods or tubes, the combination of two companion heads or plates each having in its body a curved slot with its initial or starting end outwardly deflected, a section or half of a die or former on each head or plate, each section or half:` having a peripheral face or wall conforming to thecurvature of the slots of the heads or plates With its initial or starting end in alineulent with the outwardly-deliected ends of the slots and each section or half having in its peripheral corner a groove or recess, the two grooves or recesses forming a semicircular groove or recess of a diameter corresponding to the diameter of the rod or tube, a forming-roller traveling around the peripheral face or Wall of the die or former and having its journal or shaft ends projected into the slots of the heads or plates and having in its body a semicircular groove or recess corresponding to and coinciding with the semicircular groove of the die or former and a lever pivotally mounted on the heads or plates and having in its head longitudinal slots receiving the projected ends of the roller journal or shaft for the movements of the lever to force the roller around the peripheral face or Wall of the die or former and guided in its travel by the curved slots of the heads or plates and its journal or shaft, substantially as, described. L

5. In a machine for curving or bending metal rods or tubes, the combination of two companion heads or plates each having in its body a curved slot with its initial or starting end outwardly deflected, a section or half of a die or former on each head or plate, each section or half having a peripheral face or Wall conforming to the curvature of the slots of the heads or plates with its initial or starting end in alinement with the outwardly-deflected ends of the slots and each section or half having in its peripheral corner a groove or recess, the two grooves or recesses forming a semicircular groove or recess of a diameter corresponding to the diameter of the rod or tube, a forming-roller traveling around the peripheral face or Wall of the die or former and having its journal or shaft ends projected into the slots of heads or plates and having in its body a semicircular groove or recess corresponding to and coinciding With the semicircular grooves or recesses of the die or former, a lever pivotally mounted on the heads or plates and having in its head longitudinal slots receiving the projected ends of the roller journalor shaft for the movements of the lever to force the roller around the peripheral face or wall of the die or former and guided in its travel by the curved slots of the heads or plates and its journal or shaft, and a guide on one head or plate in line with the outwardly-deflected ends of the curved slots for entering and guiding the end ofA the rod or tube into position for bending or curving, substantially as described.

JACOB N. GIBSON. Witnesses:

THOMAS B. MOGREGOR, BELLE W. BARRY.

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