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Sep 14, 2022
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How to quickly bend the perfect ring with the simplest tool

Of course, one ring of acceptable quality can be made without special equipment, but it will take a lot of time, physical strength and materials. With some special devices, it is faster to bend the bars into rings, physically easier, but there is a lot of waste and the help of third parties is needed. We are talking about pipe benders, handicraft devices, etc. Below, we will consider two devices and evaluate their capabilities.

How to quickly bend the perfect ring with the simplest tool

Fixture #1

It is a rigid frame attached to the base table. From above, a horizontally located axis is attached to it, on one side of which there is a knob for rotation, and on the other, a multifaceted sheet.

An exemplary circle of sheet steel is welded to the outside of the sheet, reinforced from the inside with a rigid steel ring. On one of the faces of the polyhedron, an elongated nut with a bolt directed radially with respect to the circle is welded.

How to quickly bend the perfect ring with the simplest tool

On the bed, parallel to the upper axis, there is another axis with a rolling bearing at some distance from the exemplary circle and at an angle to its vertical axis.

Before starting work, we place the polyhedron so that the bolt is at the bottom. We start the rod along the top of the bearing and press its end to the exemplary circle with a bolt. Rotating the knob, on a model circle we make a half ring.

How to quickly bend the perfect ring with the simplest tool

The presence of a clamping bolt does not allow bending the rod in one go. It is necessary to release the bolt, rotate the semi-ring in a standard circle, re-tighten the bolt and bring the bend of the bar to a full circle.

How to quickly bend the perfect ring with the simplest tool

The disadvantages of this device are associated with the duration of the bending process and large losses of metal. It is clearly not suitable for mass production of rings.

Device No. 2

By design, the second device for bending bars into rings is noticeably simpler. It consists of a steel sheet, on one side of which a small section of a profiled square pipe 20 × 20 mm is welded for fixing in a vice, and on the other side – 2/3 of the full ring, made of steel strip. Also, at one of the bases of the incomplete ring, a limiter-stop made of a square bar is welded on the outside at a distance of 12 mm.

How to quickly bend the perfect ring with the simplest tool
How to quickly bend the perfect ring with the simplest tool

Additionally, you need to stock up on two metal plastics 2 and 4 mm thick in order to work with bars not only 12, but also 10 and 8 mm, which are inserted between the bar and the limiter.

Working on such a device is quite simple. Take, for example, a rod with a diameter of 10 mm, the end of which is placed between the fragment of the ring and the stop, not forgetting to insert a plate 2 mm thick.

How to quickly bend the perfect ring with the simplest tool
How to quickly bend the perfect ring with the simplest tool

We grab the end of the bar with our hand and roll around the incomplete exemplary ring to the end and get a half ring. We turn the workpiece over with the other side, fasten and also run around 2/3 of the full ring.

How to quickly bend the perfect ring with the simplest tool
How to quickly bend the perfect ring with the simplest tool

In order not to waste a lot of effort, at the last stage of the bend, we will use the fork-lever and screw the ring to the end. As you can see, the ends of the ring are practically without creases. The ends of the bar bent into a ring are cut off in the middle of the overlap. We weld the joint and the ring is completely ready.

How to quickly bend the perfect ring with the simplest tool

To make a ring with a diameter of 30 cm, we take a workpiece with a length of L = π × d = 3.14 × 30 = 94.2 cm or, rounding, 100 cm. The time for making two rings is no more than 1 minute.

How to quickly bend the perfect ring with the simplest tool

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