You may think that pipe bending is a rare necessity, but it is way more common than you think. Whether you are looking under your car hood, at a child’s playground, or even the safety railing at a shopping centre you will send evidence of pipe bending. But in order to shape these strong metals into various shapes and patterns will require the use of tools and a little know how. The most commonly used tool, of course, is a pipe bender. With this tool you can more easily bend and craft the metal into your desired shape.

Pipe benders have been around for a very long time, and through the years they have undergone tweaking and perfecting until there are now several types of pipe benders available on the market. Since there has been a significant amount of development in the pipe and tubing industries, benders are now available in many shapes, sizes, and advancement to cover today’s current demands. Which one of these benders you need will all depend on your project and intended use. Each project will likely require a different approach and perhaps even a different pipe bender depending on its mode of operations, speed of operation, and the effectiveness and reliability of each device.

Materials That Can Be Bent With a Pipe Bender

Generally the metals that are able to be shaped with a bender are aluminium, copper and tin. The heavier and more durable the metal you are trying to bend the more likely you are to need a commercial pipe bender. The most common commercial benders are the hydraulic and mechanical benders. The hydraulic bender is more advanced and technical, and is therefore typically preferred over the mechanical benders. One advantage of a hydraulic machine is that it can perform a wide array of operations and functions that require a larger range of materials.

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All benders use one of four methods. Ram bending is the easiest and most affordable method. Pipe benders are controlled at each end and a ram bends the pipe in the middle. This is only used for light weight pipe. Rotary draw bending is the most popular method since it maintains the diameter of the pipe without warping. This method is used in tube bending machines to form exhaust pipes, process pipes, and for any aluminium or stainless steel projects that will not allow for any interior warping. Ring roll bender is used for shaping pipes with a large diameter. There are three rollers, one at the top and two at the bottom.

How Hydraulic Roll Benders Work

The interior of the pipe is supported by a flexible mandrel, which ensures that the interior diameter of the tube is not deformed. As the pipe rolls through, the top roller exerts a downward pressure which bends the pipe. As the outside wall is stretched it becomes thinner while the inside wall becomes thicker due to the compressing of metal. The top roller pressure may be adjusted manually or hydraulically. Also, you can power two or three rollers at a time in order to make round shapes needed for drum barrels, awnings, etc.

When the proportion of pipe diameter to wall thickness is small enough, a pipe can be bent on a small radius without excessive wrinkling or flattening.

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