US1288965A - Rod-bending machine. - Google Patents

Description

C. A. NELSON.

ROD BENDING MACHINE.

APPLICATION FILED APR.8. I918.

Patented Dec. 24, 1918.

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non BENDING MACHINE.

APPLICATION FILED APR. 8,1918. I 1,288,965. Patented Dec. 24, 1918.

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WITNESSES INVE/VTOI? A TTOR/VEYS CLYDE ALSTON NELSON, 0F CRIS'IOIBAL, CANAL ZONE.

ROD-BENDING MACHINE.

Application filed April 8, 1918.

To all whom it may concern:

Be it known that I, CLYDE A. NELsoN, a citizen of the United States, and a resident of Cristobal, Canal Zone, Republic of Panama, have invented a new and Improved Rod-Bending Machine, of which the following is a full, clear, and exact description.

This invention relates to rod bending machines and has for an object the provision of an improved construction whereby a number of rods may be quickly and accurately bent at one operation.

Another object of the invention is to provide a bending machine with a number of bending elements spaced apart whereby a single rod may be bent successively along its length for producing certain bends or indentations.

A still further object of the invention is the provision of a bending machine with rod holding members, a bending element, a single power means for operating the bending element either together or in succession for bending rods in the holding member.

In the accompanying drawings:

Figure 1 is a top plan view of part of a series of bending machines embodying the invention.

Fig. 2 is a top plan view of part of the structure shown in Fig. 1, illustrating the device in its operated position.

Fig. 3 is a section through Fig. 1 on line 33.

Fig. i is a fragmentary sectional view through F ig 1 on line lt, same being on an enlarged scale.

Fig. 5 is a top plan view of a section of rod after same has been bent.

Referring to the accompanying drawings by numerals, 1 indicates a support of any desired kind on which base plates 2 and 3 are mounted, base plate 3 preferably being somewhat elevated as shown in Fig. 3. On the plate 3 there is provided angle bars 4 and 5 for holding the various rods 6 during the bending operation. Two sets of angle bars 4 and 5 are shown, but it is, of course, evident a large number could be used without departing from the spirit of the invention, and which are used when long bars are to be provided with a large number of bends, thus causing the bars to be bent without adjusting the same, which would be necessary if only one or two bending devices were used. Arranged on the base plate 3 Specification of Letters Patent.

Patented Dec. 2a, 1918.

Serial No. 227,307.

are stops 7 and 8 which are in the form of angle bars and are bolted to plate 3 in a similar manner to the way holders 4; and 5 are bolted. All of these members, preferably the angle bars, are provided with a number of apertures for receiving the clamping bolts which pass through suitable apertures in plate 3. The apertures are arranged so that the various angle bars may be moved toward or from each other to accommodate different size bars, and in the case of the stops 7 and 8 to allow a greater or less bending action. If a considerable bend is to be provided, as for instance more than that shown in Fig. 2 the holder 4 is moved toward the pivotal pin 9. Associated with each of the holders 4 and 5, and consequently with each of the stops 7 and 8, is a cylinder 10. All of the cylinders 10 are alike, as well as the parts associated therewith, except that each alternate cylinder is operated at the opposite angle as shown in Fig. 1, so that the description of cylinder 10 will equally apply to the other cylinders. The cylinder opposite cylinder 10 will be known as cylinder 10 for the convenience of description, said cylinder operating an arm similar to arm 11 Arm 11 is pivotally conneeted. with the pin 9, which pin has one end mounted in plate 3 and the opposite end braced by the bracing bar 12, which is oper ated or otherwise secured to plate 2 at the free end. A pair of cars 13 is secured to the arm 11, said ears accommodating a bolt 14, which bolt extends through the outer end of the rod 15, which rod is pivotally connected at 16 to the piston 17. The piston 17 is connected with rod 15, as shown in Fig. 4, through fitting 18 threaded on to the piston rod, which fitting accommodates a pin 19, said pin extending through a suitable aperture in the rod 15, which rod extends preferably for the full length of the piston rod 17 and bears preferably lightly against the piston 20 whereby excessive strain may be communicated from the piston directly to the rod 15, though when said strain is not provided said rod may be allowed a slight swinging or pivotal movement so as to adjust itself automatically to the various strains brought to bear thereon.- Piston rod 17 is slidingly mounted on the head 21 which head is provided with a forwardly extending nose or uiding projection 22, which not only gui es the piston rod and acts as a bearing therefor, but accommodates the return spring which presses at one end against the projection or nose 22 and at the opposite end against piston 20 for returning the piston when the steam or air used in the cylinder has been turned off and the exhaust valve opened. The cylinder 10, as shown in Fig. 4, is provided with a single inlet pipe 24 which is connected to a' steam supply pipe 25 through the use of a flexible pipe 26. A steam control valve 27 is arranged in pipe 25 so as to turn the steam or compressed air on and off. A relief valve 28 is provided preferably at the end of pipe 25, as shown in Figs. 1 and 2, whereby after the bending operation has been performed and the steam or compressed air turned off,

valve 28 may be opened for relieving the pressure in the cylinder and thereby allow the spring 23 to return the piston and parts connected therewith. It is, of course, understood that the steam or air pressure could be left on as long as it is desired, or the steam or air pressure could be turned off and valve 28 left closed so that the parts will be held in their operated position as shown in Fig. 2, while the other arms and associate parts are being operated. In this way the rod being bent would move from one end to compensate for the material provided in the bending. Preferably a number of rods are bent at the same time as shown in Fig. 3, as it requires but little more pressure to bend a number of small. rods than would be required to bend a single rod as the extra pressure required is all utilized in bending instead of moving the various parts in the bending machinery.

As shown particularly in Fig. 3 the cylinder 10 is provided with a pair of supporting ears 29 which are clamped to the plate 2 by the bracket 30, a suitable journal or pivotal pin 31 being used so that the cylinder 10 may swing .back and forth in a hori- Zontal plane. The parts are comparatively loose so that a free movement is provided and also the weight of the cylinder 10 is carried by plate 2 through the use of sup porting legs 32 which may be the heads of supporting bolts. A bracing arm 33 acts on the pintle 31 and on part of the plate 2 for bracing the parts when in operation. The swinging of the cylinder is very desirable in order that. as the pin 14L associated with the arm 1.1 moves the cylinder may also move in order to give as nearly as possible w a direct thrustv at all times against the pin 14:

and associate parts. A flexible connecting five cents each, by addressing Washington, I). 0.

pipe or hose 26 allows this swinging movement whereby pressure may be applied for bending the rods'at an angle, as shown in Fig. 2, without changing the pivotal pin or pintle 31. In case a greater bending is desired than shown in Fig. 2 the pin 31 and associate parts could be moved including brace 33. The pin 9 could also be moved, as a number of apertures are provided therefor which would allow alimited change in the angle of bending of the rod without changing the position of the pin 31. From this it will be seen that all of the parts are adjustable to provide any desired angle in the bending and also provide for any desired length of bending.

What I claim is:

1. A rod bending machine comprising a plurality of spaced alined holders adapted to receive rods to be bent, a stop arranged between each pair of holders, said stops being offset from the holders, a pivotally mounted bending arm arranged adja cent each of said holders positioned to bend the rods supported by the holders at tWO points whereby a diagonal section will be produced extending from the holders to the stops, a power piston rod for each of said 7 arms, a piston for each of said rods, a pivotally mounted cylinder for each piston and rod, and means for manually supplying-said cylinders individually with a fluid under pressure so as to cause the bending arms to operate in any desired sequence.

2. Arod bending machine comprising a flat base, a pair of spaced alined holders ar ranged on said flat base in the same plane,

said holders being adapted to receive rods 7 I of any length, stops arranged between said holders, said stops being offset from the holders, a pivotally mounted bending arm arranged adjacent each of said holders, arranged to bend the rods supported by the holders at two points whereby a diagonal section will be produced extending from the holders to the stops, each of said bending arms being mounted on said base and in substantially the same plane as said holders, a I,

swinging cylinder for each of said arms arranged on said base, a piston arranged in each of said cylinders, a piston rod for each of said pistons connecting the pistons with said arms, and means for turning on and off .power to said cylinders whereby said pistons and said arms will be operated and the cylinders moved automaticallyto compensate for changing line of s-traln.

CLYDE LsTo -N LsoN.

the Commissioner 'of Patents,

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