Bending the Iron

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According ;to-a pre'ferredmcde'of carrying out the method,.

Harlequin | Bending the Iron

The invention is illustrated in the drawing b 55 a constructional example, the drawing showing :by. The table plate I of the machine is, in known manner, provided with one or more bending discs 2. Upon the end 3 of the main shaft of the bending machine, which projects above the 'bendingdisc 2, is fixed a segment-,shaped lever 4, which'is symmetrically formed and is provided at both ends with a suitable opening 5, so that it may, as indicated by dotted lines, be used also 10 for bending left-hand curvatures.

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Above the bending lever 4 there is mounted upon the shaft lifting of the iron bar during the bending. Thisarrangemerit; enables the "supporting rollers H I o be fixed in any desiredjposition. The bars Sand iii are arranged at the same level as the bending 2 discs2; i.

In a bending machine for bending iron bars, more particularly iron bars for reinforced concrete structures, the sub-combination of: a table; a bending disc rotatably mounted therein; a shaft for turning said disc having an end projecting upwards from said disc; a curved former adapted to be fixed to said projecting shaft; a clamping yoke fixed to said shaft and also fixed to said disc for holding the bar to be bent; and an adjustable stop upon said table for holding the remote end of the bar. In a bending machine for bending iron bars, more particularly iron bars for reinforced concrete structures, thesub-combination of: a table; a bending disc rotatably mounted therein; a shaft for turning said disc having an end projecting upwards from said disc; a curved former adapted to be fixed to said projecting shaft; a clamping yoke fixed to said shaft and also fixed to said disc for holding the bar to be bent; and an adjustable stop upon said table for holding the remote end of the bar, said adjustable stop being constituted by a transverse member fixed to the table and by a roller adjustably mounted thereon.

In a bending machine for bending iron bars, more particularly iron bars for reinforced concrete structures, the sub-combination of a table; a bending disc rotatably mounted therein; a shaft for carrying and driving said bending disc, said shaft having an end portion pro-" je'cting upwards from the table and a bending disc; a pin mounted uponsaid bending disc; a clampingyoke mounted upon the projecting 7 end upon the shaft and having a means for clamping said yoke to said pin; a curved former adapted to be fixedto the top end of said shaft for rotation therewith; and an adjustable stop upon said table; the rod to be bent being located at one point between the top end of the shaft and the pin of the table and supported at the remote end by said adjustable stop.

In a bending machine for bending iron bars, more particularly iron bars for reinforced concrete structures, the sub-combination of: a table; a bending disc rotatably mounted therein and having a number of holes for the insertion of a pin; a pin inserted into one of said holes; a shaft for driving said bending disc having an upper end projecting from said disc; a curved former inserted upon said shaft end for rotation therewith; a clamping yoke inserted upon said shaft end and enclosing said pin and having means for clamping to said pin; two bars one at each side of the table, each bar being provided with a slot; and a supporting roller slidable in said slot and fixable therein in any desired position, said curved former being symmetrically shaped and having at either end a hole for fixing to said shaft end.


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A process fortbending iron rods by means of a rocking bending member having a curved rod contacting surface shaped to the bend to be produced in the rod, said process consisting in supporting a rod between two spaced points one of which is adjacent the rockingpoint of the bending member and the other of which is spaced therefrom, and rocking said member to cause its rod contacting surface to progressively engage the rod from the support adjacent the rocking point toward the other supporting point, the resistance to bending being progressively increased on the rod.

This method has the advantage that curvatures, such as circular arcs, involutes or other shapes of any desired size can be bent directly without the necessity of employing, as hitherto; very large bending discs or blades and using heavy and unwieldy bending rollers. According to a preferred mode of carrying out the method, the curved former is constituted by a one-armed lever, which is adapted to be clutched to the bending shaft of the bending machine, said shaft constituting at the same time one of the supports for the iron to be bent.

The curved bending lever is preferably provided at both ends with an opening-for insertion upon the bending shaft, so that it may be selectively used either for right-hand or left-hand- curvatures.

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The 60 other fixed support for the iron to be bent may be constituted by pins adjustably mounted at the ends of the machine table or adjacent projecting. The invention is illustrated in the drawing by a constructional example, the drawing showing a plan of the top of the improved bending machine. The table plate I of the machine is, in known manner, provided with one or more bending discs 2.

Upon the end 3 of the main shaft of the bending machine, which projects above the bending disc 2, is fixed a segment-shaped lever 4, which is symmetrically formed and is provided at both ends with a suitable opening 5, so that it may, as indicated by dotted lines, be used also 1o for bending left-hand curvatures. Above the bending lever 4 there is mounted upon the shaft end 3 a clamping yoke 6, the clamping screw 7 of which bears against a pin 8 inserted into the bending disc 2. The pin 8 bears, during the w5 turning of the bending disc 2, against the iron bar x to be bent.

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The yoke C also prevents lifting of the iron bar during the bending. At both ends of the machine table I there are provided toothed racks 9 and 10 respectively, each formed with a longitudinal slot II for the reception of supporting rollers This arrangement enables the supporting rollers 12 to be fixed in any desired position. The bars 9 and 10 are arranged at the same level as the bending discs 2. The machine is then set in motion and, due to the rotation of the driving shaft carrying on its end 3 the bending disc 2 and the bending lever 4, the bending lever 4 rolls with its periphery, which has the curvature to be imparted to the iron bar, upon the iron bar, and the latter being supported by the fixed roller 12 and the pin 3, will therefore receive the shape indicated by dotted lines.

To reach this temperature, set the dial to 6 and allow minutes for the iron to heat up. Gauge the temperature: it's important to use a quality Surface Thermometer placed directly on the aluminum to monitor the iron's temperature. Laser temperature guns don't work well because of how their infrared energy reflects off of the aluminum iron, and we've also found that food thermometers don't give an accurate reading. Bending wood: Successful bending requires practice! We recommend using stainless steel Side Bending Straps to support wood sides during bending.

We offer inexpensive practice wood and free instructions to help you get started. It has a U. After watching a few YouTube videos, I was off and running bending sides.

Excellent product. Built a simple table to work on.


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Had no trouble bending maple sides for an archtop. I bought this bending iron when my old one died. A tip- I bend some fillets and purflings edge-wise. For half-edging on lutes and early guitars. Take a small washer and screw it between the bending iron and the violin attachment- voila!

The IBEX bending iron works as designed. I was able to bend all the side wood for a mandolin build with little trouble. Once it reached optimum bending temperature it stayed there, but it took an hour to get there. Excellent product!!!

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